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Remove the iLBC audio codec

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Bug: webrtc:372395680
Change-Id: I228777281a26ada5336aefc9168b2537e029aca3
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/365101
Commit-Queue: Alessio Bazzica <alessiob@webrtc.org>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#43234}
This commit is contained in:
Alessio Bazzica 2024-10-09 14:35:43 +02:00 committed by WebRTC LUCI CQ
parent ad49112cd0
commit 01a9264959
170 changed files with 3 additions and 13406 deletions
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15
api/audio_codecs/BUILD.gn
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@ -66,12 +66,6 @@ rtc_library("builtin_audio_decoder_factory") {
"g722:audio_decoder_g722",
]
defines = []
if (rtc_include_ilbc) {
deps += [ "ilbc:audio_decoder_ilbc" ]
defines += [ "WEBRTC_USE_BUILTIN_ILBC=1" ]
} else {
defines += [ "WEBRTC_USE_BUILTIN_ILBC=0" ]
}
if (rtc_include_opus) {
deps += [
"opus:audio_decoder_multiopus",
@ -99,15 +93,6 @@ rtc_library("builtin_audio_encoder_factory") {
"g722:audio_encoder_g722",
]
defines = []
if (rtc_include_ilbc) {
deps += [
"..:field_trials_view",
"ilbc:audio_encoder_ilbc",
]
defines += [ "WEBRTC_USE_BUILTIN_ILBC=1" ]
} else {
defines += [ "WEBRTC_USE_BUILTIN_ILBC=0" ]
}
if (rtc_include_opus) {
deps += [
"..:field_trials_view",

8
api/audio_codecs/builtin_audio_decoder_factory.cc
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@ -23,9 +23,6 @@
#include "api/audio_codecs/g711/audio_decoder_g711.h"
#include "api/audio_codecs/g722/audio_decoder_g722.h"
#include "api/scoped_refptr.h"
#if WEBRTC_USE_BUILTIN_ILBC
#include "api/audio_codecs/ilbc/audio_decoder_ilbc.h" // nogncheck
#endif
#if WEBRTC_USE_BUILTIN_OPUS
#include "api/audio_codecs/opus/audio_decoder_multi_channel_opus.h"
#include "api/audio_codecs/opus/audio_decoder_opus.h" // nogncheck
@ -62,11 +59,6 @@ rtc::scoped_refptr<AudioDecoderFactory> CreateBuiltinAudioDecoderFactory() {
#endif
AudioDecoderG722,
#if WEBRTC_USE_BUILTIN_ILBC
AudioDecoderIlbc,
#endif
AudioDecoderG711, NotAdvertised<AudioDecoderL16>>();
}

8
api/audio_codecs/builtin_audio_encoder_factory.cc
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@ -24,9 +24,6 @@
#include "api/audio_codecs/g722/audio_encoder_g722.h"
#include "api/field_trials_view.h"
#include "api/scoped_refptr.h"
#if WEBRTC_USE_BUILTIN_ILBC
#include "api/audio_codecs/ilbc/audio_encoder_ilbc.h" // nogncheck
#endif
#if WEBRTC_USE_BUILTIN_OPUS
#include "api/audio_codecs/opus/audio_encoder_multi_channel_opus.h"
#include "api/audio_codecs/opus/audio_encoder_opus.h" // nogncheck
@ -69,11 +66,6 @@ rtc::scoped_refptr<AudioEncoderFactory> CreateBuiltinAudioEncoderFactory() {
#endif
AudioEncoderG722,
#if WEBRTC_USE_BUILTIN_ILBC
AudioEncoderIlbc,
#endif
AudioEncoderG711, NotAdvertised<AudioEncoderL16>>();
}

53
api/audio_codecs/ilbc/BUILD.gn
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@ -1,53 +0,0 @@
# Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
#
# Use of this source code is governed by a BSD-style license
# that can be found in the LICENSE file in the root of the source
# tree. An additional intellectual property rights grant can be found
# in the file PATENTS. All contributing project authors may
# be found in the AUTHORS file in the root of the source tree.
import("../../../webrtc.gni")
if (is_android) {
import("//build/config/android/config.gni")
import("//build/config/android/rules.gni")
}
rtc_source_set("audio_encoder_ilbc_config") {
visibility = [ "*" ]
sources = [ "audio_encoder_ilbc_config.h" ]
}
rtc_library("audio_encoder_ilbc") {
visibility = [ "*" ]
poisonous = [ "audio_codecs" ]
sources = [
"audio_encoder_ilbc.cc",
"audio_encoder_ilbc.h",
]
deps = [
":audio_encoder_ilbc_config",
"..:audio_codecs_api",
"../../../api:field_trials_view",
"../../../modules/audio_coding:ilbc",
"../../../rtc_base:checks",
"../../../rtc_base:safe_conversions",
"../../../rtc_base:safe_minmax",
"../../../rtc_base:stringutils",
"//third_party/abseil-cpp/absl/strings",
]
}
rtc_library("audio_decoder_ilbc") {
visibility = [ "*" ]
poisonous = [ "audio_codecs" ]
sources = [
"audio_decoder_ilbc.cc",
"audio_decoder_ilbc.h",
]
deps = [
"..:audio_codecs_api",
"../../../api:field_trials_view",
"../../../modules/audio_coding:ilbc",
"//third_party/abseil-cpp/absl/strings",
]
}

47
api/audio_codecs/ilbc/audio_decoder_ilbc.cc
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@ -1,47 +0,0 @@
/*
* Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "api/audio_codecs/ilbc/audio_decoder_ilbc.h"
#include <memory>
#include <optional>
#include <vector>
#include "absl/strings/match.h"
#include "api/audio_codecs/audio_codec_pair_id.h"
#include "api/audio_codecs/audio_decoder.h"
#include "api/audio_codecs/audio_format.h"
#include "api/field_trials_view.h"
#include "modules/audio_coding/codecs/ilbc/audio_decoder_ilbc.h"
namespace webrtc {
std::optional<AudioDecoderIlbc::Config> AudioDecoderIlbc::SdpToConfig(
const SdpAudioFormat& format) {
if (absl::EqualsIgnoreCase(format.name, "ILBC") &&
format.clockrate_hz == 8000 && format.num_channels == 1) {
return Config();
}
return std::nullopt;
}
void AudioDecoderIlbc::AppendSupportedDecoders(
std::vector<AudioCodecSpec>* specs) {
specs->push_back({{"ILBC", 8000, 1}, {8000, 1, 13300}});
}
std::unique_ptr<AudioDecoder> AudioDecoderIlbc::MakeAudioDecoder(
Config config,
std::optional<AudioCodecPairId> /*codec_pair_id*/,
const FieldTrialsView* field_trials) {
return std::make_unique<AudioDecoderIlbcImpl>();
}
} // namespace webrtc

39
api/audio_codecs/ilbc/audio_decoder_ilbc.h
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@ -1,39 +0,0 @@
/*
* Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef API_AUDIO_CODECS_ILBC_AUDIO_DECODER_ILBC_H_
#define API_AUDIO_CODECS_ILBC_AUDIO_DECODER_ILBC_H_
#include <memory>
#include <optional>
#include <vector>
#include "api/audio_codecs/audio_codec_pair_id.h"
#include "api/audio_codecs/audio_decoder.h"
#include "api/audio_codecs/audio_format.h"
#include "api/field_trials_view.h"
namespace webrtc {
// ILBC decoder API for use as a template parameter to
// CreateAudioDecoderFactory<...>().
struct AudioDecoderIlbc {
struct Config {}; // Empty---no config values needed!
static std::optional<Config> SdpToConfig(const SdpAudioFormat& audio_format);
static void AppendSupportedDecoders(std::vector<AudioCodecSpec>* specs);
static std::unique_ptr<AudioDecoder> MakeAudioDecoder(
Config config,
std::optional<AudioCodecPairId> codec_pair_id = std::nullopt,
const FieldTrialsView* field_trials = nullptr);
};
} // namespace webrtc
#endif // API_AUDIO_CODECS_ILBC_AUDIO_DECODER_ILBC_H_

97
api/audio_codecs/ilbc/audio_encoder_ilbc.cc
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@ -1,97 +0,0 @@
/*
* Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "api/audio_codecs/ilbc/audio_encoder_ilbc.h"
#include <map>
#include <memory>
#include <optional>
#include <string>
#include <utility>
#include <vector>
#include "absl/strings/match.h"
#include "api/audio_codecs/audio_codec_pair_id.h"
#include "api/audio_codecs/audio_encoder.h"
#include "api/audio_codecs/audio_format.h"
#include "api/audio_codecs/ilbc/audio_encoder_ilbc_config.h"
#include "api/field_trials_view.h"
#include "modules/audio_coding/codecs/ilbc/audio_encoder_ilbc.h"
#include "rtc_base/checks.h"
#include "rtc_base/numerics/safe_minmax.h"
#include "rtc_base/string_to_number.h"
namespace webrtc {
namespace {
int GetIlbcBitrate(int ptime) {
switch (ptime) {
case 20:
case 40:
// 38 bytes per frame of 20 ms => 15200 bits/s.
return 15200;
case 30:
case 60:
// 50 bytes per frame of 30 ms => (approx) 13333 bits/s.
return 13333;
default:
RTC_CHECK_NOTREACHED();
}
}
} // namespace
std::optional<AudioEncoderIlbcConfig> AudioEncoderIlbc::SdpToConfig(
const SdpAudioFormat& format) {
if (!absl::EqualsIgnoreCase(format.name.c_str(), "ILBC") ||
format.clockrate_hz != 8000 || format.num_channels != 1) {
return std::nullopt;
}
AudioEncoderIlbcConfig config;
auto ptime_iter = format.parameters.find("ptime");
if (ptime_iter != format.parameters.end()) {
auto ptime = rtc::StringToNumber<int>(ptime_iter->second);
if (ptime && *ptime > 0) {
const int whole_packets = *ptime / 10;
config.frame_size_ms = rtc::SafeClamp<int>(whole_packets * 10, 20, 60);
}
}
if (!config.IsOk()) {
RTC_DCHECK_NOTREACHED();
return std::nullopt;
}
return config;
}
void AudioEncoderIlbc::AppendSupportedEncoders(
std::vector<AudioCodecSpec>* specs) {
const SdpAudioFormat fmt = {"ILBC", 8000, 1};
const AudioCodecInfo info = QueryAudioEncoder(*SdpToConfig(fmt));
specs->push_back({fmt, info});
}
AudioCodecInfo AudioEncoderIlbc::QueryAudioEncoder(
const AudioEncoderIlbcConfig& config) {
RTC_DCHECK(config.IsOk());
return {8000, 1, GetIlbcBitrate(config.frame_size_ms)};
}
std::unique_ptr<AudioEncoder> AudioEncoderIlbc::MakeAudioEncoder(
const AudioEncoderIlbcConfig& config,
int payload_type,
std::optional<AudioCodecPairId> /*codec_pair_id*/,
const FieldTrialsView* field_trials) {
if (!config.IsOk()) {
RTC_DCHECK_NOTREACHED();
return nullptr;
}
return std::make_unique<AudioEncoderIlbcImpl>(config, payload_type);
}
} // namespace webrtc

43
api/audio_codecs/ilbc/audio_encoder_ilbc.h
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@ -1,43 +0,0 @@
/*
* Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef API_AUDIO_CODECS_ILBC_AUDIO_ENCODER_ILBC_H_
#define API_AUDIO_CODECS_ILBC_AUDIO_ENCODER_ILBC_H_
#include <memory>
#include <optional>
#include <vector>
#include "api/audio_codecs/audio_codec_pair_id.h"
#include "api/audio_codecs/audio_encoder.h"
#include "api/audio_codecs/audio_format.h"
#include "api/audio_codecs/ilbc/audio_encoder_ilbc_config.h"
#include "api/field_trials_view.h"
namespace webrtc {
// ILBC encoder API for use as a template parameter to
// CreateAudioEncoderFactory<...>().
struct AudioEncoderIlbc {
using Config = AudioEncoderIlbcConfig;
static std::optional<AudioEncoderIlbcConfig> SdpToConfig(
const SdpAudioFormat& audio_format);
static void AppendSupportedEncoders(std::vector<AudioCodecSpec>* specs);
static AudioCodecInfo QueryAudioEncoder(const AudioEncoderIlbcConfig& config);
static std::unique_ptr<AudioEncoder> MakeAudioEncoder(
const AudioEncoderIlbcConfig& config,
int payload_type,
std::optional<AudioCodecPairId> codec_pair_id = std::nullopt,
const FieldTrialsView* field_trials = nullptr);
};
} // namespace webrtc
#endif // API_AUDIO_CODECS_ILBC_AUDIO_ENCODER_ILBC_H_

28
api/audio_codecs/ilbc/audio_encoder_ilbc_config.h
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@ -1,28 +0,0 @@
/*
* Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef API_AUDIO_CODECS_ILBC_AUDIO_ENCODER_ILBC_CONFIG_H_
#define API_AUDIO_CODECS_ILBC_AUDIO_ENCODER_ILBC_CONFIG_H_
namespace webrtc {
struct AudioEncoderIlbcConfig {
bool IsOk() const {
return (frame_size_ms == 20 || frame_size_ms == 30 || frame_size_ms == 40 ||
frame_size_ms == 60);
}
int frame_size_ms = 30; // Valid values are 20, 30, 40, and 60 ms.
// Note that frame size 40 ms produces encodings with two 20 ms frames in
// them, and frame size 60 ms consists of two 30 ms frames.
};
} // namespace webrtc
#endif // API_AUDIO_CODECS_ILBC_AUDIO_ENCODER_ILBC_CONFIG_H_

2
api/audio_codecs/test/BUILD.gn
View File

@ -33,8 +33,6 @@ if (rtc_include_tests) {
"../g711:audio_encoder_g711",
"../g722:audio_decoder_g722",
"../g722:audio_encoder_g722",
"../ilbc:audio_decoder_ilbc",
"../ilbc:audio_encoder_ilbc",
"../opus:audio_decoder_opus",
"../opus:audio_encoder_opus",
]

15
api/audio_codecs/test/audio_decoder_factory_template_unittest.cc
View File

@ -22,7 +22,6 @@
#include "api/audio_codecs/audio_format.h"
#include "api/audio_codecs/g711/audio_decoder_g711.h"
#include "api/audio_codecs/g722/audio_decoder_g722.h"
#include "api/audio_codecs/ilbc/audio_decoder_ilbc.h"
#include "api/audio_codecs/opus/audio_decoder_opus.h"
#include "api/environment/environment.h"
#include "api/environment/environment_factory.h"
@ -242,20 +241,6 @@ TEST(AudioDecoderFactoryTemplateTest, G722) {
ASSERT_EQ(nullptr, dec3);
}
TEST(AudioDecoderFactoryTemplateTest, Ilbc) {
const Environment env = CreateEnvironment();
auto factory = CreateAudioDecoderFactory<AudioDecoderIlbc>();
EXPECT_THAT(factory->GetSupportedDecoders(),
::testing::ElementsAre(
AudioCodecSpec{{"ILBC", 8000, 1}, {8000, 1, 13300}}));
EXPECT_FALSE(factory->IsSupportedDecoder({"foo", 8000, 1}));
EXPECT_TRUE(factory->IsSupportedDecoder({"ilbc", 8000, 1}));
EXPECT_EQ(nullptr, factory->Create(env, {"bar", 8000, 1}, std::nullopt));
auto dec = factory->Create(env, {"ilbc", 8000, 1}, std::nullopt);
ASSERT_NE(nullptr, dec);
EXPECT_EQ(8000, dec->SampleRateHz());
}
TEST(AudioDecoderFactoryTemplateTest, L16) {
const Environment env = CreateEnvironment();
auto factory = CreateAudioDecoderFactory<AudioDecoderL16>();

16
api/audio_codecs/test/audio_encoder_factory_template_unittest.cc
View File

@ -22,7 +22,6 @@
#include "api/audio_codecs/audio_format.h"
#include "api/audio_codecs/g711/audio_encoder_g711.h"
#include "api/audio_codecs/g722/audio_encoder_g722.h"
#include "api/audio_codecs/ilbc/audio_encoder_ilbc.h"
#include "api/audio_codecs/opus/audio_encoder_opus.h"
#include "api/environment/environment.h"
#include "api/environment/environment_factory.h"
@ -266,21 +265,6 @@ TEST(AudioEncoderFactoryTemplateTest, G722) {
Pointer(Property(&AudioEncoder::SampleRateHz, 16000)));
}
TEST(AudioEncoderFactoryTemplateTest, Ilbc) {
const Environment env = CreateEnvironment();
auto factory = CreateAudioEncoderFactory<AudioEncoderIlbc>();
EXPECT_THAT(factory->GetSupportedEncoders(),
::testing::ElementsAre(
AudioCodecSpec{{"ILBC", 8000, 1}, {8000, 1, 13333}}));
EXPECT_EQ(std::nullopt, factory->QueryAudioEncoder({"foo", 8000, 1}));
EXPECT_EQ(AudioCodecInfo(8000, 1, 13333),
factory->QueryAudioEncoder({"ilbc", 8000, 1}));
EXPECT_THAT(factory->Create(env, {"bar", 8000, 1}, {}), IsNull());
EXPECT_THAT(factory->Create(env, {"ilbc", 8000, 1}, {}),
Pointer(Property(&AudioEncoder::SampleRateHz, 8000)));
}
TEST(AudioEncoderFactoryTemplateTest, L16) {
const Environment env = CreateEnvironment();
auto factory = CreateAudioEncoderFactory<AudioEncoderL16>();

218
modules/audio_coding/BUILD.gn
View File

@ -191,186 +191,6 @@ rtc_library("g722_c") {
deps = [ "../third_party/g722:g722_3p" ]
}
rtc_library("ilbc") {
visibility += webrtc_default_visibility
poisonous = [ "audio_codecs" ]
sources = [
"codecs/ilbc/audio_decoder_ilbc.cc",
"codecs/ilbc/audio_decoder_ilbc.h",
"codecs/ilbc/audio_encoder_ilbc.cc",
"codecs/ilbc/audio_encoder_ilbc.h",
]
deps = [
":legacy_encoded_audio_frame",
"../../api:array_view",
"../../api/audio_codecs:audio_codecs_api",
"../../api/audio_codecs/ilbc:audio_encoder_ilbc_config",
"../../api/units:time_delta",
"../../common_audio",
"../../rtc_base:buffer",
"../../rtc_base:checks",
"../../rtc_base:logging",
"../../rtc_base:safe_conversions",
]
public_deps += [ ":ilbc_c" ] # no-presubmit-check TODO(webrtc:8603)
}
rtc_library("ilbc_c") {
poisonous = [ "audio_codecs" ]
sources = [
"codecs/ilbc/abs_quant.c",
"codecs/ilbc/abs_quant.h",
"codecs/ilbc/abs_quant_loop.c",
"codecs/ilbc/abs_quant_loop.h",
"codecs/ilbc/augmented_cb_corr.c",
"codecs/ilbc/augmented_cb_corr.h",
"codecs/ilbc/bw_expand.c",
"codecs/ilbc/bw_expand.h",
"codecs/ilbc/cb_construct.c",
"codecs/ilbc/cb_construct.h",
"codecs/ilbc/cb_mem_energy.c",
"codecs/ilbc/cb_mem_energy.h",
"codecs/ilbc/cb_mem_energy_augmentation.c",
"codecs/ilbc/cb_mem_energy_augmentation.h",
"codecs/ilbc/cb_mem_energy_calc.c",
"codecs/ilbc/cb_mem_energy_calc.h",
"codecs/ilbc/cb_search.c",
"codecs/ilbc/cb_search.h",
"codecs/ilbc/cb_search_core.c",
"codecs/ilbc/cb_search_core.h",
"codecs/ilbc/cb_update_best_index.c",
"codecs/ilbc/cb_update_best_index.h",
"codecs/ilbc/chebyshev.c",
"codecs/ilbc/chebyshev.h",
"codecs/ilbc/comp_corr.c",
"codecs/ilbc/comp_corr.h",
"codecs/ilbc/constants.c",
"codecs/ilbc/constants.h",
"codecs/ilbc/create_augmented_vec.c",
"codecs/ilbc/create_augmented_vec.h",
"codecs/ilbc/decode.c",
"codecs/ilbc/decode.h",
"codecs/ilbc/decode_residual.c",
"codecs/ilbc/decode_residual.h",
"codecs/ilbc/decoder_interpolate_lsf.c",
"codecs/ilbc/decoder_interpolate_lsf.h",
"codecs/ilbc/defines.h",
"codecs/ilbc/do_plc.c",
"codecs/ilbc/do_plc.h",
"codecs/ilbc/encode.c",
"codecs/ilbc/encode.h",
"codecs/ilbc/energy_inverse.c",
"codecs/ilbc/energy_inverse.h",
"codecs/ilbc/enh_upsample.c",
"codecs/ilbc/enh_upsample.h",
"codecs/ilbc/enhancer.c",
"codecs/ilbc/enhancer.h",
"codecs/ilbc/enhancer_interface.c",
"codecs/ilbc/enhancer_interface.h",
"codecs/ilbc/filtered_cb_vecs.c",
"codecs/ilbc/filtered_cb_vecs.h",
"codecs/ilbc/frame_classify.c",
"codecs/ilbc/frame_classify.h",
"codecs/ilbc/gain_dequant.c",
"codecs/ilbc/gain_dequant.h",
"codecs/ilbc/gain_quant.c",
"codecs/ilbc/gain_quant.h",
"codecs/ilbc/get_cd_vec.c",
"codecs/ilbc/get_cd_vec.h",
"codecs/ilbc/get_lsp_poly.c",
"codecs/ilbc/get_lsp_poly.h",
"codecs/ilbc/get_sync_seq.c",
"codecs/ilbc/get_sync_seq.h",
"codecs/ilbc/hp_input.c",
"codecs/ilbc/hp_input.h",
"codecs/ilbc/hp_output.c",
"codecs/ilbc/hp_output.h",
"codecs/ilbc/ilbc.c",
"codecs/ilbc/ilbc.h",
"codecs/ilbc/index_conv_dec.c",
"codecs/ilbc/index_conv_dec.h",
"codecs/ilbc/index_conv_enc.c",
"codecs/ilbc/index_conv_enc.h",
"codecs/ilbc/init_decode.c",
"codecs/ilbc/init_decode.h",
"codecs/ilbc/init_encode.c",
"codecs/ilbc/init_encode.h",
"codecs/ilbc/interpolate.c",
"codecs/ilbc/interpolate.h",
"codecs/ilbc/interpolate_samples.c",
"codecs/ilbc/interpolate_samples.h",
"codecs/ilbc/lpc_encode.c",
"codecs/ilbc/lpc_encode.h",
"codecs/ilbc/lsf_check.c",
"codecs/ilbc/lsf_check.h",
"codecs/ilbc/lsf_interpolate_to_poly_dec.c",
"codecs/ilbc/lsf_interpolate_to_poly_dec.h",
"codecs/ilbc/lsf_interpolate_to_poly_enc.c",
"codecs/ilbc/lsf_interpolate_to_poly_enc.h",
"codecs/ilbc/lsf_to_lsp.c",
"codecs/ilbc/lsf_to_lsp.h",
"codecs/ilbc/lsf_to_poly.c",
"codecs/ilbc/lsf_to_poly.h",
"codecs/ilbc/lsp_to_lsf.c",
"codecs/ilbc/lsp_to_lsf.h",
"codecs/ilbc/my_corr.c",
"codecs/ilbc/my_corr.h",
"codecs/ilbc/nearest_neighbor.c",
"codecs/ilbc/nearest_neighbor.h",
"codecs/ilbc/pack_bits.c",
"codecs/ilbc/pack_bits.h",
"codecs/ilbc/poly_to_lsf.c",
"codecs/ilbc/poly_to_lsf.h",
"codecs/ilbc/poly_to_lsp.c",
"codecs/ilbc/poly_to_lsp.h",
"codecs/ilbc/refiner.c",
"codecs/ilbc/refiner.h",
"codecs/ilbc/simple_interpolate_lsf.c",
"codecs/ilbc/simple_interpolate_lsf.h",
"codecs/ilbc/simple_lpc_analysis.c",
"codecs/ilbc/simple_lpc_analysis.h",
"codecs/ilbc/simple_lsf_dequant.c",
"codecs/ilbc/simple_lsf_dequant.h",
"codecs/ilbc/simple_lsf_quant.c",
"codecs/ilbc/simple_lsf_quant.h",
"codecs/ilbc/smooth.c",
"codecs/ilbc/smooth.h",
"codecs/ilbc/smooth_out_data.c",
"codecs/ilbc/smooth_out_data.h",
"codecs/ilbc/sort_sq.c",
"codecs/ilbc/sort_sq.h",
"codecs/ilbc/split_vq.c",
"codecs/ilbc/split_vq.h",
"codecs/ilbc/state_construct.c",
"codecs/ilbc/state_construct.h",
"codecs/ilbc/state_search.c",
"codecs/ilbc/state_search.h",
"codecs/ilbc/swap_bytes.c",
"codecs/ilbc/swap_bytes.h",
"codecs/ilbc/unpack_bits.c",
"codecs/ilbc/unpack_bits.h",
"codecs/ilbc/vq3.c",
"codecs/ilbc/vq3.h",
"codecs/ilbc/vq4.c",
"codecs/ilbc/vq4.h",
"codecs/ilbc/window32_w32.c",
"codecs/ilbc/window32_w32.h",
"codecs/ilbc/xcorr_coef.c",
"codecs/ilbc/xcorr_coef.h",
]
deps = [
"../../api/audio_codecs:audio_codecs_api",
"../../common_audio",
"../../common_audio:common_audio_c",
"../../rtc_base:checks",
"../../rtc_base:sanitizer",
"../../rtc_base/system:arch",
"//third_party/abseil-cpp/absl/base:core_headers",
]
}
rtc_library("isac_vad") {
visibility += [ "../audio_processing/vad:*" ]
sources = [
@ -949,9 +769,6 @@ if (rtc_include_tests) {
"../../common_audio",
"../../system_wrappers",
]
if (rtc_include_ilbc) {
audio_coding_deps += [ ":ilbc" ]
}
if (rtc_include_opus) {
audio_coding_deps += [ ":webrtc_opus" ]
}
@ -985,8 +802,6 @@ if (rtc_include_tests) {
":audio_decoder_unittests",
":g711_test",
":g722_test",
":ilbc_test",
":neteq_ilbc_quality_test",
":neteq_opus_quality_test",
":neteq_pcm16b_quality_test",
":neteq_pcmu_quality_test",
@ -1046,8 +861,6 @@ if (rtc_include_tests) {
"../../api/audio_codecs/g711:audio_encoder_g711",
"../../api/audio_codecs/g722:audio_decoder_g722",
"../../api/audio_codecs/g722:audio_encoder_g722",
"../../api/audio_codecs/ilbc:audio_decoder_ilbc",
"../../api/audio_codecs/ilbc:audio_encoder_ilbc",
"../../api/audio_codecs/opus:audio_decoder_opus",
"../../api/audio_codecs/opus:audio_encoder_opus",
"../../api/environment",
@ -1171,7 +984,6 @@ if (rtc_include_tests) {
defines = neteq_defines
deps = [
":ilbc",
":neteq",
":neteq_input_audio_tools",
":neteq_tools",
@ -1377,7 +1189,6 @@ if (rtc_include_tests) {
"../../api/audio_codecs/L16:audio_encoder_L16",
"../../api/audio_codecs/g711:audio_encoder_g711",
"../../api/audio_codecs/g722:audio_encoder_g722",
"../../api/audio_codecs/ilbc:audio_encoder_ilbc",
"../../api/audio_codecs/opus:audio_encoder_opus",
"../../api/environment:environment_factory",
"../../rtc_base:checks",
@ -1469,25 +1280,6 @@ if (rtc_include_tests) {
]
}
rtc_executable("neteq_ilbc_quality_test") {
testonly = true
sources = [ "neteq/test/neteq_ilbc_quality_test.cc" ]
deps = [
":ilbc",
":neteq",
":neteq_quality_test_support",
":neteq_tools",
"../../rtc_base:checks",
"../../rtc_base:safe_conversions",
"../../test:fileutils",
"../../test:test_main",
"//testing/gtest",
"//third_party/abseil-cpp/absl/flags:flag",
]
}
rtc_executable("neteq_pcmu_quality_test") {
testonly = true
@ -1542,14 +1334,6 @@ if (rtc_include_tests) {
}
if (!build_with_chromium) {
rtc_executable("ilbc_test") {
testonly = true
sources = [ "codecs/ilbc/test/iLBC_test.c" ]
deps = [ ":ilbc" ]
}
rtc_executable("webrtc_opus_fec_test") {
testonly = true
@ -1588,7 +1372,6 @@ if (rtc_include_tests) {
"codecs/builtin_audio_encoder_factory_unittest.cc",
"codecs/cng/audio_encoder_cng_unittest.cc",
"codecs/cng/cng_unittest.cc",
"codecs/ilbc/ilbc_unittest.cc",
"codecs/legacy_encoded_audio_frame_unittest.cc",
"codecs/opus/audio_decoder_multi_channel_opus_unittest.cc",
"codecs/opus/audio_encoder_multi_channel_opus_unittest.cc",
@ -1654,7 +1437,6 @@ if (rtc_include_tests) {
":audio_encoder_cng",
":audio_network_adaptor",
":g711",
":ilbc",
":legacy_encoded_audio_frame",
":mocks",
":neteq",

3
modules/audio_coding/audio_coding.gni
View File

@ -9,9 +9,6 @@
import("../../webrtc.gni")
audio_codec_defines = []
if (rtc_include_ilbc) {
audio_codec_defines += [ "WEBRTC_CODEC_ILBC" ]
}
if (rtc_include_opus) {
audio_codec_defines += [ "WEBRTC_CODEC_OPUS" ]
}

82
modules/audio_coding/codecs/ilbc/abs_quant.c
View File

@ -1,82 +0,0 @@
/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_AbsQuant.c
******************************************************************/
#include "modules/audio_coding/codecs/ilbc/abs_quant.h"
#include "modules/audio_coding/codecs/ilbc/abs_quant_loop.h"
#include "modules/audio_coding/codecs/ilbc/constants.h"
#include "modules/audio_coding/codecs/ilbc/defines.h"
/*----------------------------------------------------------------*
* predictive noise shaping encoding of scaled start state
* (subrutine for WebRtcIlbcfix_StateSearch)
*---------------------------------------------------------------*/
void WebRtcIlbcfix_AbsQuant(
IlbcEncoder *iLBCenc_inst,
/* (i) Encoder instance */
iLBC_bits *iLBC_encbits, /* (i/o) Encoded bits (outputs idxForMax
and idxVec, uses state_first as
input) */
int16_t *in, /* (i) vector to encode */
int16_t *weightDenum /* (i) denominator of synthesis filter */
) {
int16_t *syntOut;
size_t quantLen[2];
/* Stack based */
int16_t syntOutBuf[LPC_FILTERORDER+STATE_SHORT_LEN_30MS];
int16_t in_weightedVec[STATE_SHORT_LEN_30MS+LPC_FILTERORDER];
int16_t *in_weighted = &in_weightedVec[LPC_FILTERORDER];
/* Initialize the buffers */
WebRtcSpl_MemSetW16(syntOutBuf, 0, LPC_FILTERORDER+STATE_SHORT_LEN_30MS);
syntOut = &syntOutBuf[LPC_FILTERORDER];
/* Start with zero state */
WebRtcSpl_MemSetW16(in_weightedVec, 0, LPC_FILTERORDER);
/* Perform the quantization loop in two sections of length quantLen[i],
where the perceptual weighting filter is updated at the subframe
border */
if (iLBC_encbits->state_first) {
quantLen[0]=SUBL;
quantLen[1]=iLBCenc_inst->state_short_len-SUBL;
} else {
quantLen[0]=iLBCenc_inst->state_short_len-SUBL;
quantLen[1]=SUBL;
}
/* Calculate the weighted residual, switch perceptual weighting
filter at the subframe border */
WebRtcSpl_FilterARFastQ12(
in, in_weighted,
weightDenum, LPC_FILTERORDER+1, quantLen[0]);
WebRtcSpl_FilterARFastQ12(
&in[quantLen[0]], &in_weighted[quantLen[0]],
&weightDenum[LPC_FILTERORDER+1], LPC_FILTERORDER+1, quantLen[1]);
WebRtcIlbcfix_AbsQuantLoop(
syntOut,
in_weighted,
weightDenum,
quantLen,
iLBC_encbits->idxVec);
}

42
modules/audio_coding/codecs/ilbc/abs_quant.h
View File

@ -1,42 +0,0 @@
/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_AbsQuant.h
******************************************************************/
#ifndef MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_ABS_QUANT_H_
#define MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_ABS_QUANT_H_
#include <stddef.h>
#include <stdint.h>
#include "modules/audio_coding/codecs/ilbc/defines.h"
/*----------------------------------------------------------------*
* predictive noise shaping encoding of scaled start state
* (subrutine for WebRtcIlbcfix_StateSearch)
*---------------------------------------------------------------*/
void WebRtcIlbcfix_AbsQuant(
IlbcEncoder* iLBCenc_inst,
/* (i) Encoder instance */
iLBC_bits* iLBC_encbits, /* (i/o) Encoded bits (outputs idxForMax
and idxVec, uses state_first as
input) */
int16_t* in, /* (i) vector to encode */
int16_t* weightDenum /* (i) denominator of synthesis filter */
);
#endif

89
modules/audio_coding/codecs/ilbc/abs_quant_loop.c
View File

@ -1,89 +0,0 @@
/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_AbsQuantLoop.c
******************************************************************/
#include "modules/audio_coding/codecs/ilbc/abs_quant_loop.h"
#include "modules/audio_coding/codecs/ilbc/constants.h"
#include "modules/audio_coding/codecs/ilbc/defines.h"
#include "modules/audio_coding/codecs/ilbc/sort_sq.h"
void WebRtcIlbcfix_AbsQuantLoop(int16_t *syntOutIN, int16_t *in_weightedIN,
int16_t *weightDenumIN, size_t *quantLenIN,
int16_t *idxVecIN ) {
size_t k1, k2;
int16_t index;
int32_t toQW32;
int32_t toQ32;
int16_t tmp16a;
int16_t xq;
int16_t *syntOut = syntOutIN;
int16_t *in_weighted = in_weightedIN;
int16_t *weightDenum = weightDenumIN;
size_t *quantLen = quantLenIN;
int16_t *idxVec = idxVecIN;
for(k1=0;k1<2;k1++) {
for(k2=0;k2<quantLen[k1];k2++){
/* Filter to get the predicted value */
WebRtcSpl_FilterARFastQ12(
syntOut, syntOut,
weightDenum, LPC_FILTERORDER+1, 1);
/* the quantizer */
toQW32 = (int32_t)(*in_weighted) - (int32_t)(*syntOut);
toQ32 = (((int32_t)toQW32)<<2);
if (toQ32 > 32767) {
toQ32 = (int32_t) 32767;
} else if (toQ32 < -32768) {
toQ32 = (int32_t) -32768;
}
/* Quantize the state */
if (toQW32<(-7577)) {
/* To prevent negative overflow */
index=0;
} else if (toQW32>8151) {
/* To prevent positive overflow */
index=7;
} else {
/* Find the best quantization index
(state_sq3Tbl is in Q13 and toQ is in Q11)
*/
WebRtcIlbcfix_SortSq(&xq, &index,
(int16_t)toQ32,
WebRtcIlbcfix_kStateSq3, 8);
}
/* Store selected index */
(*idxVec++) = index;
/* Compute decoded sample and update of the prediction filter */
tmp16a = ((WebRtcIlbcfix_kStateSq3[index] + 2 ) >> 2);
*syntOut = (int16_t) (tmp16a + (int32_t)(*in_weighted) - toQW32);
syntOut++; in_weighted++;
}
/* Update perceptual weighting filter at subframe border */
weightDenum += 11;
}
}

36
modules/audio_coding/codecs/ilbc/abs_quant_loop.h
View File

@ -1,36 +0,0 @@
/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_AbsQuantLoop.h
******************************************************************/
#ifndef MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_ABS_QUANT_LOOP_H_
#define MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_ABS_QUANT_LOOP_H_
#include <stddef.h>
#include <stdint.h>
/*----------------------------------------------------------------*
* predictive noise shaping encoding of scaled start state
* (subrutine for WebRtcIlbcfix_StateSearch)
*---------------------------------------------------------------*/
void WebRtcIlbcfix_AbsQuantLoop(int16_t* syntOutIN,
int16_t* in_weightedIN,
int16_t* weightDenumIN,
size_t* quantLenIN,
int16_t* idxVecIN);
#endif

110
modules/audio_coding/codecs/ilbc/audio_decoder_ilbc.cc
View File

@ -1,110 +0,0 @@
/*
* Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "modules/audio_coding/codecs/ilbc/audio_decoder_ilbc.h"
#include <memory>
#include <utility>
#include "modules/audio_coding/codecs/ilbc/ilbc.h"
#include "modules/audio_coding/codecs/legacy_encoded_audio_frame.h"
#include "rtc_base/checks.h"
#include "rtc_base/logging.h"
namespace webrtc {
AudioDecoderIlbcImpl::AudioDecoderIlbcImpl() {
WebRtcIlbcfix_DecoderCreate(&dec_state_);
WebRtcIlbcfix_Decoderinit30Ms(dec_state_);
}
AudioDecoderIlbcImpl::~AudioDecoderIlbcImpl() {
WebRtcIlbcfix_DecoderFree(dec_state_);
}
bool AudioDecoderIlbcImpl::HasDecodePlc() const {
return true;
}
int AudioDecoderIlbcImpl::DecodeInternal(const uint8_t* encoded,
size_t encoded_len,
int sample_rate_hz,
int16_t* decoded,
SpeechType* speech_type) {
RTC_DCHECK_EQ(sample_rate_hz, 8000);
int16_t temp_type = 1; // Default is speech.
int ret = WebRtcIlbcfix_Decode(dec_state_, encoded, encoded_len, decoded,
&temp_type);
*speech_type = ConvertSpeechType(temp_type);
return ret;
}
size_t AudioDecoderIlbcImpl::DecodePlc(size_t num_frames, int16_t* decoded) {
return WebRtcIlbcfix_NetEqPlc(dec_state_, decoded, num_frames);
}
void AudioDecoderIlbcImpl::Reset() {
WebRtcIlbcfix_Decoderinit30Ms(dec_state_);
}
std::vector<AudioDecoder::ParseResult> AudioDecoderIlbcImpl::ParsePayload(
rtc::Buffer&& payload,
uint32_t timestamp) {
std::vector<ParseResult> results;
size_t bytes_per_frame;
int timestamps_per_frame;
if (payload.size() >= 950) {
RTC_LOG(LS_WARNING)
<< "AudioDecoderIlbcImpl::ParsePayload: Payload too large";
return results;
}
if (payload.size() % 38 == 0) {
// 20 ms frames.
bytes_per_frame = 38;
timestamps_per_frame = 160;
} else if (payload.size() % 50 == 0) {
// 30 ms frames.
bytes_per_frame = 50;
timestamps_per_frame = 240;
} else {
RTC_LOG(LS_WARNING)
<< "AudioDecoderIlbcImpl::ParsePayload: Invalid payload";
return results;
}
RTC_DCHECK_EQ(0, payload.size() % bytes_per_frame);
if (payload.size() == bytes_per_frame) {
std::unique_ptr<EncodedAudioFrame> frame(
new LegacyEncodedAudioFrame(this, std::move(payload)));
results.emplace_back(timestamp, 0, std::move(frame));
} else {
size_t byte_offset;
uint32_t timestamp_offset;
for (byte_offset = 0, timestamp_offset = 0; byte_offset < payload.size();
byte_offset += bytes_per_frame,
timestamp_offset += timestamps_per_frame) {
std::unique_ptr<EncodedAudioFrame> frame(new LegacyEncodedAudioFrame(
this, rtc::Buffer(payload.data() + byte_offset, bytes_per_frame)));
results.emplace_back(timestamp + timestamp_offset, 0, std::move(frame));
}
}
return results;
}
int AudioDecoderIlbcImpl::SampleRateHz() const {
return 8000;
}
size_t AudioDecoderIlbcImpl::Channels() const {
return 1;
}
} // namespace webrtc

54
modules/audio_coding/codecs/ilbc/audio_decoder_ilbc.h
View File

@ -1,54 +0,0 @@
/*
* Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef MODULES_AUDIO_CODING_CODECS_ILBC_AUDIO_DECODER_ILBC_H_
#define MODULES_AUDIO_CODING_CODECS_ILBC_AUDIO_DECODER_ILBC_H_
#include <stddef.h>
#include <stdint.h>
#include <vector>
#include "api/audio_codecs/audio_decoder.h"
#include "rtc_base/buffer.h"
typedef struct iLBC_decinst_t_ IlbcDecoderInstance;
namespace webrtc {
class AudioDecoderIlbcImpl final : public AudioDecoder {
public:
AudioDecoderIlbcImpl();
~AudioDecoderIlbcImpl() override;
AudioDecoderIlbcImpl(const AudioDecoderIlbcImpl&) = delete;
AudioDecoderIlbcImpl& operator=(const AudioDecoderIlbcImpl&) = delete;
bool HasDecodePlc() const override;
size_t DecodePlc(size_t num_frames, int16_t* decoded) override;
void Reset() override;
std::vector<ParseResult> ParsePayload(rtc::Buffer&& payload,
uint32_t timestamp) override;
int SampleRateHz() const override;
size_t Channels() const override;
protected:
int DecodeInternal(const uint8_t* encoded,
size_t encoded_len,
int sample_rate_hz,
int16_t* decoded,
SpeechType* speech_type) override;
private:
IlbcDecoderInstance* dec_state_;
};
} // namespace webrtc
#endif // MODULES_AUDIO_CODING_CODECS_ILBC_AUDIO_DECODER_ILBC_H_

151
modules/audio_coding/codecs/ilbc/audio_encoder_ilbc.cc
View File

@ -1,151 +0,0 @@
/*
* Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "modules/audio_coding/codecs/ilbc/audio_encoder_ilbc.h"
#include <algorithm>
#include <cstdint>
#include "modules/audio_coding/codecs/ilbc/ilbc.h"
#include "rtc_base/checks.h"
#include "rtc_base/numerics/safe_conversions.h"
namespace webrtc {
namespace {
const int kSampleRateHz = 8000;
int GetIlbcBitrate(int ptime) {
switch (ptime) {
case 20:
case 40:
// 38 bytes per frame of 20 ms => 15200 bits/s.
return 15200;
case 30:
case 60:
// 50 bytes per frame of 30 ms => (approx) 13333 bits/s.
return 13333;
default:
RTC_CHECK_NOTREACHED();
}
}
} // namespace
AudioEncoderIlbcImpl::AudioEncoderIlbcImpl(const AudioEncoderIlbcConfig& config,
int payload_type)
: frame_size_ms_(config.frame_size_ms),
payload_type_(payload_type),
num_10ms_frames_per_packet_(
static_cast<size_t>(config.frame_size_ms / 10)),
encoder_(nullptr) {
RTC_CHECK(config.IsOk());
Reset();
}
AudioEncoderIlbcImpl::~AudioEncoderIlbcImpl() {
RTC_CHECK_EQ(0, WebRtcIlbcfix_EncoderFree(encoder_));
}
int AudioEncoderIlbcImpl::SampleRateHz() const {
return kSampleRateHz;
}
size_t AudioEncoderIlbcImpl::NumChannels() const {
return 1;
}
size_t AudioEncoderIlbcImpl::Num10MsFramesInNextPacket() const {
return num_10ms_frames_per_packet_;
}
size_t AudioEncoderIlbcImpl::Max10MsFramesInAPacket() const {
return num_10ms_frames_per_packet_;
}
int AudioEncoderIlbcImpl::GetTargetBitrate() const {
return GetIlbcBitrate(rtc::dchecked_cast<int>(num_10ms_frames_per_packet_) *
10);
}
AudioEncoder::EncodedInfo AudioEncoderIlbcImpl::EncodeImpl(
uint32_t rtp_timestamp,
rtc::ArrayView<const int16_t> audio,
rtc::Buffer* encoded) {
// Save timestamp if starting a new packet.
if (num_10ms_frames_buffered_ == 0)
first_timestamp_in_buffer_ = rtp_timestamp;
// Buffer input.
std::copy(audio.cbegin(), audio.cend(),
input_buffer_ + kSampleRateHz / 100 * num_10ms_frames_buffered_);
// If we don't yet have enough buffered input for a whole packet, we're done
// for now.
if (++num_10ms_frames_buffered_ < num_10ms_frames_per_packet_) {
return EncodedInfo();
}
// Encode buffered input.
RTC_DCHECK_EQ(num_10ms_frames_buffered_, num_10ms_frames_per_packet_);
num_10ms_frames_buffered_ = 0;
size_t encoded_bytes = encoded->AppendData(
RequiredOutputSizeBytes(), [&](rtc::ArrayView<uint8_t> encoded) {
const int r = WebRtcIlbcfix_Encode(
encoder_, input_buffer_,
kSampleRateHz / 100 * num_10ms_frames_per_packet_, encoded.data());
RTC_CHECK_GE(r, 0);
return static_cast<size_t>(r);
});
RTC_DCHECK_EQ(encoded_bytes, RequiredOutputSizeBytes());
EncodedInfo info;
info.encoded_bytes = encoded_bytes;
info.encoded_timestamp = first_timestamp_in_buffer_;
info.payload_type = payload_type_;
info.encoder_type = CodecType::kIlbc;
return info;
}
void AudioEncoderIlbcImpl::Reset() {
if (encoder_)
RTC_CHECK_EQ(0, WebRtcIlbcfix_EncoderFree(encoder_));
RTC_CHECK_EQ(0, WebRtcIlbcfix_EncoderCreate(&encoder_));
const int encoder_frame_size_ms =
frame_size_ms_ > 30 ? frame_size_ms_ / 2 : frame_size_ms_;
RTC_CHECK_EQ(0, WebRtcIlbcfix_EncoderInit(encoder_, encoder_frame_size_ms));
num_10ms_frames_buffered_ = 0;
}
std::optional<std::pair<TimeDelta, TimeDelta>>
AudioEncoderIlbcImpl::GetFrameLengthRange() const {
return {{TimeDelta::Millis(num_10ms_frames_per_packet_ * 10),
TimeDelta::Millis(num_10ms_frames_per_packet_ * 10)}};
}
size_t AudioEncoderIlbcImpl::RequiredOutputSizeBytes() const {
switch (num_10ms_frames_per_packet_) {
case 2:
return 38;
case 3:
return 50;
case 4:
return 2 * 38;
case 6:
return 2 * 50;
default:
RTC_CHECK_NOTREACHED();
}
}
} // namespace webrtc

61
modules/audio_coding/codecs/ilbc/audio_encoder_ilbc.h
View File

@ -1,61 +0,0 @@
/*
* Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef MODULES_AUDIO_CODING_CODECS_ILBC_AUDIO_ENCODER_ILBC_H_
#define MODULES_AUDIO_CODING_CODECS_ILBC_AUDIO_ENCODER_ILBC_H_
#include <stddef.h>
#include <stdint.h>
#include <optional>
#include <utility>
#include "api/audio_codecs/audio_encoder.h"
#include "api/audio_codecs/ilbc/audio_encoder_ilbc_config.h"
#include "api/units/time_delta.h"
#include "modules/audio_coding/codecs/ilbc/ilbc.h"
namespace webrtc {
class AudioEncoderIlbcImpl final : public AudioEncoder {
public:
AudioEncoderIlbcImpl(const AudioEncoderIlbcConfig& config, int payload_type);
~AudioEncoderIlbcImpl() override;
AudioEncoderIlbcImpl(const AudioEncoderIlbcImpl&) = delete;
AudioEncoderIlbcImpl& operator=(const AudioEncoderIlbcImpl&) = delete;
int SampleRateHz() const override;
size_t NumChannels() const override;
size_t Num10MsFramesInNextPacket() const override;
size_t Max10MsFramesInAPacket() const override;
int GetTargetBitrate() const override;
EncodedInfo EncodeImpl(uint32_t rtp_timestamp,
rtc::ArrayView<const int16_t> audio,
rtc::Buffer* encoded) override;
void Reset() override;
std::optional<std::pair<TimeDelta, TimeDelta>> GetFrameLengthRange()
const override;
private:
size_t RequiredOutputSizeBytes() const;
static constexpr size_t kMaxSamplesPerPacket = 480;
const int frame_size_ms_;
const int payload_type_;
const size_t num_10ms_frames_per_packet_;
size_t num_10ms_frames_buffered_;
uint32_t first_timestamp_in_buffer_;
int16_t input_buffer_[kMaxSamplesPerPacket];
IlbcEncoderInstance* encoder_;
};
} // namespace webrtc
#endif // MODULES_AUDIO_CODING_CODECS_ILBC_AUDIO_ENCODER_ILBC_H_

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modules/audio_coding/codecs/ilbc/augmented_cb_corr.c
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_AugmentedCbCorr.c
******************************************************************/
#include "modules/audio_coding/codecs/ilbc/augmented_cb_corr.h"
#include "modules/audio_coding/codecs/ilbc/constants.h"
#include "modules/audio_coding/codecs/ilbc/defines.h"
void WebRtcIlbcfix_AugmentedCbCorr(
int16_t *target, /* (i) Target vector */
int16_t *buffer, /* (i) Memory buffer */
int16_t *interpSamples, /* (i) buffer with
interpolated samples */
int32_t *crossDot, /* (o) The cross correlation between
the target and the Augmented
vector */
size_t low, /* (i) Lag to start from (typically
20) */
size_t high, /* (i) Lag to end at (typically 39) */
int scale) /* (i) Scale factor to use for
the crossDot */
{
size_t lagcount;
size_t ilow;
int16_t *targetPtr;
int32_t *crossDotPtr;
int16_t *iSPtr=interpSamples;
/* Calculate the correlation between the target and the
interpolated codebook. The correlation is calculated in
3 sections with the interpolated part in the middle */
crossDotPtr=crossDot;
for (lagcount=low; lagcount<=high; lagcount++) {
ilow = lagcount - 4;
/* Compute dot product for the first (lagcount-4) samples */
(*crossDotPtr) = WebRtcSpl_DotProductWithScale(target, buffer-lagcount, ilow, scale);
/* Compute dot product on the interpolated samples */
(*crossDotPtr) += WebRtcSpl_DotProductWithScale(target+ilow, iSPtr, 4, scale);
targetPtr = target + lagcount;
iSPtr += lagcount-ilow;
/* Compute dot product for the remaining samples */
(*crossDotPtr) += WebRtcSpl_DotProductWithScale(targetPtr, buffer-lagcount, SUBL-lagcount, scale);
crossDotPtr++;
}
}

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modules/audio_coding/codecs/ilbc/augmented_cb_corr.h
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_AugmentedCbCorr.h
******************************************************************/
#ifndef MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_AUGMENTED_CB_CORR_H_
#define MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_AUGMENTED_CB_CORR_H_
#include <stddef.h>
#include <stdint.h>
/*----------------------------------------------------------------*
* Calculate correlation between target and Augmented codebooks
*---------------------------------------------------------------*/
void WebRtcIlbcfix_AugmentedCbCorr(
int16_t* target, /* (i) Target vector */
int16_t* buffer, /* (i) Memory buffer */
int16_t* interpSamples, /* (i) buffer with
interpolated samples */
int32_t* crossDot, /* (o) The cross correlation between
the target and the Augmented
vector */
size_t low, /* (i) Lag to start from (typically
20) */
size_t high, /* (i) Lag to end at (typically 39 */
int scale); /* (i) Scale factor to use for the crossDot */
#endif

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modules/audio_coding/codecs/ilbc/bw_expand.c
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_BwExpand.c
******************************************************************/
#include "modules/audio_coding/codecs/ilbc/bw_expand.h"
#include "modules/audio_coding/codecs/ilbc/defines.h"
/*----------------------------------------------------------------*
* lpc bandwidth expansion
*---------------------------------------------------------------*/
/* The output is in the same domain as the input */
void WebRtcIlbcfix_BwExpand(
int16_t *out, /* (o) the bandwidth expanded lpc coefficients */
int16_t *in, /* (i) the lpc coefficients before bandwidth
expansion */
int16_t *coef, /* (i) the bandwidth expansion factor Q15 */
int16_t length /* (i) the length of lpc coefficient vectors */
) {
int i;
out[0] = in[0];
for (i = 1; i < length; i++) {
/* out[i] = coef[i] * in[i] with rounding.
in[] and out[] are in Q12 and coef[] is in Q15
*/
out[i] = (int16_t)((coef[i] * in[i] + 16384) >> 15);
}
}

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modules/audio_coding/codecs/ilbc/bw_expand.h
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_BwExpand.h
******************************************************************/
#ifndef MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_BW_EXPAND_H_
#define MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_BW_EXPAND_H_
#include <stddef.h>
#include <stdint.h>
/*----------------------------------------------------------------*
* lpc bandwidth expansion
*---------------------------------------------------------------*/
void WebRtcIlbcfix_BwExpand(
int16_t* out, /* (o) the bandwidth expanded lpc coefficients */
int16_t* in, /* (i) the lpc coefficients before bandwidth
expansion */
int16_t* coef, /* (i) the bandwidth expansion factor Q15 */
int16_t length /* (i) the length of lpc coefficient vectors */
);
#endif

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modules/audio_coding/codecs/ilbc/cb_construct.c
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_CbConstruct.c
******************************************************************/
#include "modules/audio_coding/codecs/ilbc/cb_construct.h"
#include "modules/audio_coding/codecs/ilbc/defines.h"
#include "modules/audio_coding/codecs/ilbc/gain_dequant.h"
#include "modules/audio_coding/codecs/ilbc/get_cd_vec.h"
#include "rtc_base/sanitizer.h"
// An arithmetic operation that is allowed to overflow. (It's still undefined
// behavior, so not a good idea; this just makes UBSan ignore the violation, so
// that our old code can continue to do what it's always been doing.)
static inline int32_t RTC_NO_SANITIZE("signed-integer-overflow")
OverflowingAddS32S32ToS32(int32_t a, int32_t b) {
return a + b;
}
/*----------------------------------------------------------------*
* Construct decoded vector from codebook and gains.
*---------------------------------------------------------------*/
bool WebRtcIlbcfix_CbConstruct(
int16_t* decvector, /* (o) Decoded vector */
const int16_t* index, /* (i) Codebook indices */
const int16_t* gain_index, /* (i) Gain quantization indices */
int16_t* mem, /* (i) Buffer for codevector construction */
size_t lMem, /* (i) Length of buffer */
size_t veclen) { /* (i) Length of vector */
size_t j;
int16_t gain[CB_NSTAGES];
/* Stack based */
int16_t cbvec0[SUBL];
int16_t cbvec1[SUBL];
int16_t cbvec2[SUBL];
int32_t a32;
int16_t *gainPtr;
/* gain de-quantization */
gain[0] = WebRtcIlbcfix_GainDequant(gain_index[0], 16384, 0);
gain[1] = WebRtcIlbcfix_GainDequant(gain_index[1], gain[0], 1);
gain[2] = WebRtcIlbcfix_GainDequant(gain_index[2], gain[1], 2);
/* codebook vector construction and construction of total vector */
/* Stack based */
if (!WebRtcIlbcfix_GetCbVec(cbvec0, mem, (size_t)index[0], lMem, veclen))
return false; // Failure.
if (!WebRtcIlbcfix_GetCbVec(cbvec1, mem, (size_t)index[1], lMem, veclen))
return false; // Failure.
if (!WebRtcIlbcfix_GetCbVec(cbvec2, mem, (size_t)index[2], lMem, veclen))
return false; // Failure.
gainPtr = &gain[0];
for (j=0;j<veclen;j++) {
a32 = (*gainPtr++) * cbvec0[j];
a32 += (*gainPtr++) * cbvec1[j];
a32 = OverflowingAddS32S32ToS32(a32, (*gainPtr) * cbvec2[j]);
gainPtr -= 2;
decvector[j] = (int16_t)((a32 + 8192) >> 14);
}
return true; // Success.
}

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modules/audio_coding/codecs/ilbc/cb_construct.h
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_CbConstruct.h
******************************************************************/
#ifndef MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_CB_CONSTRUCT_H_
#define MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_CB_CONSTRUCT_H_
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include "absl/base/attributes.h"
#include "modules/audio_coding/codecs/ilbc/defines.h"
/*----------------------------------------------------------------*
* Construct decoded vector from codebook and gains.
*---------------------------------------------------------------*/
// Returns true on success, false on failure.
ABSL_MUST_USE_RESULT
bool WebRtcIlbcfix_CbConstruct(
int16_t* decvector, /* (o) Decoded vector */
const int16_t* index, /* (i) Codebook indices */
const int16_t* gain_index, /* (i) Gain quantization indices */
int16_t* mem, /* (i) Buffer for codevector construction */
size_t lMem, /* (i) Length of buffer */
size_t veclen /* (i) Length of vector */
);
#endif

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modules/audio_coding/codecs/ilbc/cb_mem_energy.c
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_CbMemEnergy.c
******************************************************************/
#include "modules/audio_coding/codecs/ilbc/cb_mem_energy.h"
#include "modules/audio_coding/codecs/ilbc/cb_mem_energy_calc.h"
#include "modules/audio_coding/codecs/ilbc/constants.h"
#include "modules/audio_coding/codecs/ilbc/defines.h"
/*----------------------------------------------------------------*
* Function WebRtcIlbcfix_CbMemEnergy computes the energy of all
* the vectors in the codebook memory that will be used in the
* following search for the best match.
*----------------------------------------------------------------*/
void WebRtcIlbcfix_CbMemEnergy(
size_t range,
int16_t *CB, /* (i) The CB memory (1:st section) */
int16_t *filteredCB, /* (i) The filtered CB memory (2:nd section) */
size_t lMem, /* (i) Length of the CB memory */
size_t lTarget, /* (i) Length of the target vector */
int16_t *energyW16, /* (o) Energy in the CB vectors */
int16_t *energyShifts, /* (o) Shift value of the energy */
int scale, /* (i) The scaling of all energy values */
size_t base_size /* (i) Index to where energy values should be stored */
) {
int16_t *ppi, *ppo, *pp;
int32_t energy, tmp32;
/* Compute the energy and store it in a vector. Also the
* corresponding shift values are stored. The energy values
* are reused in all three stages. */
/* Calculate the energy in the first block of 'lTarget' sampels. */
ppi = CB+lMem-lTarget-1;
ppo = CB+lMem-1;
pp=CB+lMem-lTarget;
energy = WebRtcSpl_DotProductWithScale( pp, pp, lTarget, scale);
/* Normalize the energy and store the number of shifts */
energyShifts[0] = (int16_t)WebRtcSpl_NormW32(energy);
tmp32 = energy << energyShifts[0];
energyW16[0] = (int16_t)(tmp32 >> 16);
/* Compute the energy of the rest of the cb memory
* by step wise adding and subtracting the next
* sample and the last sample respectively. */
WebRtcIlbcfix_CbMemEnergyCalc(energy, range, ppi, ppo, energyW16, energyShifts, scale, 0);
/* Next, precompute the energy values for the filtered cb section */
energy=0;
pp=filteredCB+lMem-lTarget;
energy = WebRtcSpl_DotProductWithScale( pp, pp, lTarget, scale);
/* Normalize the energy and store the number of shifts */
energyShifts[base_size] = (int16_t)WebRtcSpl_NormW32(energy);
tmp32 = energy << energyShifts[base_size];
energyW16[base_size] = (int16_t)(tmp32 >> 16);
ppi = filteredCB + lMem - 1 - lTarget;
ppo = filteredCB + lMem - 1;
WebRtcIlbcfix_CbMemEnergyCalc(energy, range, ppi, ppo, energyW16, energyShifts, scale, base_size);
}

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modules/audio_coding/codecs/ilbc/cb_mem_energy.h
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_CbMemEnergy.h
******************************************************************/
#ifndef MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_CB_MEM_ENERGY_H_
#define MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_CB_MEM_ENERGY_H_
#include <stddef.h>
#include <stdint.h>
void WebRtcIlbcfix_CbMemEnergy(
size_t range,
int16_t* CB, /* (i) The CB memory (1:st section) */
int16_t* filteredCB, /* (i) The filtered CB memory (2:nd section) */
size_t lMem, /* (i) Length of the CB memory */
size_t lTarget, /* (i) Length of the target vector */
int16_t* energyW16, /* (o) Energy in the CB vectors */
int16_t* energyShifts, /* (o) Shift value of the energy */
int scale, /* (i) The scaling of all energy values */
size_t base_size /* (i) Index to where energy values should be stored */
);
#endif

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modules/audio_coding/codecs/ilbc/cb_mem_energy_augmentation.c
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_CbMemEnergyAugmentation.c
******************************************************************/
#include "modules/audio_coding/codecs/ilbc/cb_mem_energy_augmentation.h"
#include "modules/audio_coding/codecs/ilbc/constants.h"
#include "modules/audio_coding/codecs/ilbc/defines.h"
void WebRtcIlbcfix_CbMemEnergyAugmentation(
int16_t *interpSamples, /* (i) The interpolated samples */
int16_t *CBmem, /* (i) The CB memory */
int scale, /* (i) The scaling of all energy values */
size_t base_size, /* (i) Index to where energy values should be stored */
int16_t *energyW16, /* (o) Energy in the CB vectors */
int16_t *energyShifts /* (o) Shift value of the energy */
){
int32_t energy, tmp32;
int16_t *ppe, *pp, *interpSamplesPtr;
int16_t *CBmemPtr;
size_t lagcount;
int16_t *enPtr=&energyW16[base_size-20];
int16_t *enShPtr=&energyShifts[base_size-20];
int32_t nrjRecursive;
CBmemPtr = CBmem+147;
interpSamplesPtr = interpSamples;
/* Compute the energy for the first (low-5) noninterpolated samples */
nrjRecursive = WebRtcSpl_DotProductWithScale( CBmemPtr-19, CBmemPtr-19, 15, scale);
ppe = CBmemPtr - 20;
for (lagcount=20; lagcount<=39; lagcount++) {
/* Update the energy recursively to save complexity */
nrjRecursive += (*ppe * *ppe) >> scale;
ppe--;
energy = nrjRecursive;
/* interpolation */
energy += WebRtcSpl_DotProductWithScale(interpSamplesPtr, interpSamplesPtr, 4, scale);
interpSamplesPtr += 4;
/* Compute energy for the remaining samples */
pp = CBmemPtr - lagcount;
energy += WebRtcSpl_DotProductWithScale(pp, pp, SUBL-lagcount, scale);
/* Normalize the energy and store the number of shifts */
(*enShPtr) = (int16_t)WebRtcSpl_NormW32(energy);
tmp32 = energy << *enShPtr;
*enPtr = (int16_t)(tmp32 >> 16);
enShPtr++;
enPtr++;
}
}

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modules/audio_coding/codecs/ilbc/cb_mem_energy_augmentation.h
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_CbMemEnergyAugmentation.h
******************************************************************/
#ifndef MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_CB_MEM_ENERGY_AUGMENTATION_H_
#define MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_CB_MEM_ENERGY_AUGMENTATION_H_
#include <stddef.h>
#include <stdint.h>
void WebRtcIlbcfix_CbMemEnergyAugmentation(
int16_t* interpSamples, /* (i) The interpolated samples */
int16_t* CBmem, /* (i) The CB memory */
int scale, /* (i) The scaling of all energy values */
size_t base_size, /* (i) Index to where energy values should be stored */
int16_t* energyW16, /* (o) Energy in the CB vectors */
int16_t* energyShifts /* (o) Shift value of the energy */
);
#endif

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modules/audio_coding/codecs/ilbc/cb_mem_energy_calc.c
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_CbMemEnergyCalc.c
******************************************************************/
#include "modules/audio_coding/codecs/ilbc/cb_mem_energy_calc.h"
#include "modules/audio_coding/codecs/ilbc/defines.h"
/* Compute the energy of the rest of the cb memory
* by step wise adding and subtracting the next
* sample and the last sample respectively */
void WebRtcIlbcfix_CbMemEnergyCalc(
int32_t energy, /* (i) input start energy */
size_t range, /* (i) number of iterations */
int16_t *ppi, /* (i) input pointer 1 */
int16_t *ppo, /* (i) input pointer 2 */
int16_t *energyW16, /* (o) Energy in the CB vectors */
int16_t *energyShifts, /* (o) Shift value of the energy */
int scale, /* (i) The scaling of all energy values */
size_t base_size /* (i) Index to where energy values should be stored */
)
{
size_t j;
int16_t shft;
int32_t tmp;
int16_t *eSh_ptr;
int16_t *eW16_ptr;
eSh_ptr = &energyShifts[1+base_size];
eW16_ptr = &energyW16[1+base_size];
for (j = 0; j + 1 < range; j++) {
/* Calculate next energy by a +/-
operation on the edge samples */
tmp = (*ppi) * (*ppi) - (*ppo) * (*ppo);
energy += tmp >> scale;
energy = WEBRTC_SPL_MAX(energy, 0);
ppi--;
ppo--;
/* Normalize the energy into a int16_t and store
the number of shifts */
shft = (int16_t)WebRtcSpl_NormW32(energy);
*eSh_ptr++ = shft;
tmp = energy << shft;
*eW16_ptr++ = (int16_t)(tmp >> 16);
}
}

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modules/audio_coding/codecs/ilbc/cb_mem_energy_calc.h
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_CbMemEnergyCalc.h
******************************************************************/
#ifndef MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_CB_MEM_ENERGY_CALC_H_
#define MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_CB_MEM_ENERGY_CALC_H_
#include <stddef.h>
#include <stdint.h>
void WebRtcIlbcfix_CbMemEnergyCalc(
int32_t energy, /* (i) input start energy */
size_t range, /* (i) number of iterations */
int16_t* ppi, /* (i) input pointer 1 */
int16_t* ppo, /* (i) input pointer 2 */
int16_t* energyW16, /* (o) Energy in the CB vectors */
int16_t* energyShifts, /* (o) Shift value of the energy */
int scale, /* (i) The scaling of all energy values */
size_t base_size /* (i) Index to where energy values should be stored */
);
#endif

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modules/audio_coding/codecs/ilbc/cb_search.c
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_CbSearch.c
******************************************************************/
#include "modules/audio_coding/codecs/ilbc/cb_search.h"
#include "modules/audio_coding/codecs/ilbc/augmented_cb_corr.h"
#include "modules/audio_coding/codecs/ilbc/cb_mem_energy.h"
#include "modules/audio_coding/codecs/ilbc/cb_mem_energy_augmentation.h"
#include "modules/audio_coding/codecs/ilbc/cb_search_core.h"
#include "modules/audio_coding/codecs/ilbc/cb_update_best_index.h"
#include "modules/audio_coding/codecs/ilbc/constants.h"
#include "modules/audio_coding/codecs/ilbc/create_augmented_vec.h"
#include "modules/audio_coding/codecs/ilbc/defines.h"
#include "modules/audio_coding/codecs/ilbc/energy_inverse.h"
#include "modules/audio_coding/codecs/ilbc/filtered_cb_vecs.h"
#include "modules/audio_coding/codecs/ilbc/gain_quant.h"
#include "modules/audio_coding/codecs/ilbc/interpolate_samples.h"
/*----------------------------------------------------------------*
* Search routine for codebook encoding and gain quantization.
*----------------------------------------------------------------*/
void WebRtcIlbcfix_CbSearch(
IlbcEncoder *iLBCenc_inst,
/* (i) the encoder state structure */
int16_t *index, /* (o) Codebook indices */
int16_t *gain_index, /* (o) Gain quantization indices */
int16_t *intarget, /* (i) Target vector for encoding */
int16_t *decResidual,/* (i) Decoded residual for codebook construction */
size_t lMem, /* (i) Length of buffer */
size_t lTarget, /* (i) Length of vector */
int16_t *weightDenum,/* (i) weighting filter coefficients in Q12 */
size_t block /* (i) the subblock number */
) {
size_t i, range;
int16_t ii, j, stage;
int16_t *pp;
int16_t tmp;
int scale;
int16_t bits, temp1, temp2;
size_t base_size;
int32_t codedEner, targetEner;
int16_t gains[CB_NSTAGES+1];
int16_t *cb_vecPtr;
size_t indexOffset, sInd, eInd;
int32_t CritMax=0;
int16_t shTotMax=WEBRTC_SPL_WORD16_MIN;
size_t bestIndex=0;
int16_t bestGain=0;
size_t indexNew;
int16_t CritNewSh;
int32_t CritNew;
int32_t *cDotPtr;
size_t noOfZeros;
int16_t *gainPtr;
int32_t t32, tmpW32;
int16_t *WebRtcIlbcfix_kGainSq5_ptr;
/* Stack based */
int16_t CBbuf[CB_MEML+LPC_FILTERORDER+CB_HALFFILTERLEN];
int32_t cDot[128];
int32_t Crit[128];
int16_t targetVec[SUBL+LPC_FILTERORDER];
int16_t cbvectors[CB_MEML + 1]; /* Adding one extra position for
Coverity warnings. */
int16_t codedVec[SUBL];
int16_t interpSamples[20*4];
int16_t interpSamplesFilt[20*4];
int16_t energyW16[CB_EXPAND*128];
int16_t energyShifts[CB_EXPAND*128];
int16_t *inverseEnergy=energyW16; /* Reuse memory */
int16_t *inverseEnergyShifts=energyShifts; /* Reuse memory */
int16_t *buf = &CBbuf[LPC_FILTERORDER];
int16_t *target = &targetVec[LPC_FILTERORDER];
int16_t *aug_vec = (int16_t*)cDot; /* length [SUBL], reuse memory */
/* Determine size of codebook sections */
base_size=lMem-lTarget+1;
if (lTarget==SUBL) {
base_size=lMem-19;
}
/* weighting of the CB memory */
noOfZeros=lMem-WebRtcIlbcfix_kFilterRange[block];
WebRtcSpl_MemSetW16(&buf[-LPC_FILTERORDER], 0, noOfZeros+LPC_FILTERORDER);
WebRtcSpl_FilterARFastQ12(
decResidual+noOfZeros, buf+noOfZeros,
weightDenum, LPC_FILTERORDER+1, WebRtcIlbcfix_kFilterRange[block]);
/* weighting of the target vector */
WEBRTC_SPL_MEMCPY_W16(&target[-LPC_FILTERORDER], buf+noOfZeros+WebRtcIlbcfix_kFilterRange[block]-LPC_FILTERORDER, LPC_FILTERORDER);
WebRtcSpl_FilterARFastQ12(
intarget, target,
weightDenum, LPC_FILTERORDER+1, lTarget);
/* Store target, towards the end codedVec is calculated as
the initial target minus the remaining target */
WEBRTC_SPL_MEMCPY_W16(codedVec, target, lTarget);
/* Find the highest absolute value to calculate proper
vector scale factor (so that it uses 12 bits) */
temp1 = WebRtcSpl_MaxAbsValueW16(buf, lMem);
temp2 = WebRtcSpl_MaxAbsValueW16(target, lTarget);
if ((temp1>0)&&(temp2>0)) {
temp1 = WEBRTC_SPL_MAX(temp1, temp2);
scale = WebRtcSpl_GetSizeInBits((uint32_t)(temp1 * temp1));
} else {
/* temp1 or temp2 is negative (maximum was -32768) */
scale = 30;
}
/* Scale to so that a mul-add 40 times does not overflow */
scale = scale - 25;
scale = WEBRTC_SPL_MAX(0, scale);
/* Compute energy of the original target */
targetEner = WebRtcSpl_DotProductWithScale(target, target, lTarget, scale);
/* Prepare search over one more codebook section. This section
is created by filtering the original buffer with a filter. */
WebRtcIlbcfix_FilteredCbVecs(cbvectors, buf, lMem, WebRtcIlbcfix_kFilterRange[block]);
range = WebRtcIlbcfix_kSearchRange[block][0];
if(lTarget == SUBL) {
/* Create the interpolated samples and store them for use in all stages */
/* First section, non-filtered half of the cb */
WebRtcIlbcfix_InterpolateSamples(interpSamples, buf, lMem);
/* Second section, filtered half of the cb */
WebRtcIlbcfix_InterpolateSamples(interpSamplesFilt, cbvectors, lMem);
/* Compute the CB vectors' energies for the first cb section (non-filtered) */
WebRtcIlbcfix_CbMemEnergyAugmentation(interpSamples, buf,
scale, 20, energyW16, energyShifts);
/* Compute the CB vectors' energies for the second cb section (filtered cb) */
WebRtcIlbcfix_CbMemEnergyAugmentation(interpSamplesFilt, cbvectors, scale,
base_size + 20, energyW16,
energyShifts);
/* Compute the CB vectors' energies and store them in the vector
* energyW16. Also the corresponding shift values are stored. The
* energy values are used in all three stages. */
WebRtcIlbcfix_CbMemEnergy(range, buf, cbvectors, lMem,
lTarget, energyW16+20, energyShifts+20, scale, base_size);
} else {
/* Compute the CB vectors' energies and store them in the vector
* energyW16. Also the corresponding shift values are stored. The
* energy values are used in all three stages. */
WebRtcIlbcfix_CbMemEnergy(range, buf, cbvectors, lMem,
lTarget, energyW16, energyShifts, scale, base_size);
/* Set the energy positions 58-63 and 122-127 to zero
(otherwise they are uninitialized) */
WebRtcSpl_MemSetW16(energyW16+range, 0, (base_size-range));
WebRtcSpl_MemSetW16(energyW16+range+base_size, 0, (base_size-range));
}
/* Calculate Inverse Energy (energyW16 is already normalized
and will contain the inverse energy in Q29 after this call */
WebRtcIlbcfix_EnergyInverse(energyW16, base_size*CB_EXPAND);
/* The gain value computed in the previous stage is used
* as an upper limit to what the next stage gain value
* is allowed to be. In stage 0, 16384 (1.0 in Q14) is used as
* the upper limit. */
gains[0] = 16384;
for (stage=0; stage<CB_NSTAGES; stage++) {
/* Set up memories */
range = WebRtcIlbcfix_kSearchRange[block][stage];
/* initialize search measures */
CritMax=0;
shTotMax=-100;
bestIndex=0;
bestGain=0;
/* loop over lags 40+ in the first codebook section, full search */
cb_vecPtr = buf+lMem-lTarget;
/* Calculate all the cross correlations (augmented part of CB) */
if (lTarget==SUBL) {
WebRtcIlbcfix_AugmentedCbCorr(target, buf+lMem,
interpSamples, cDot,
20, 39, scale);
cDotPtr=&cDot[20];
} else {
cDotPtr=cDot;
}
/* Calculate all the cross correlations (main part of CB) */
WebRtcSpl_CrossCorrelation(cDotPtr, target, cb_vecPtr, lTarget, range, scale, -1);
/* Adjust the search range for the augmented vectors */
if (lTarget==SUBL) {
range=WebRtcIlbcfix_kSearchRange[block][stage]+20;
} else {
range=WebRtcIlbcfix_kSearchRange[block][stage];
}
indexOffset=0;
/* Search for best index in this part of the vector */
WebRtcIlbcfix_CbSearchCore(
cDot, range, stage, inverseEnergy,
inverseEnergyShifts, Crit,
&indexNew, &CritNew, &CritNewSh);
/* Update the global best index and the corresponding gain */
WebRtcIlbcfix_CbUpdateBestIndex(
CritNew, CritNewSh, indexNew+indexOffset, cDot[indexNew+indexOffset],
inverseEnergy[indexNew+indexOffset], inverseEnergyShifts[indexNew+indexOffset],
&CritMax, &shTotMax, &bestIndex, &bestGain);
sInd = ((CB_RESRANGE >> 1) > bestIndex) ?
0 : (bestIndex - (CB_RESRANGE >> 1));
eInd=sInd+CB_RESRANGE;
if (eInd>=range) {
eInd=range-1;
sInd=eInd-CB_RESRANGE;
}
range = WebRtcIlbcfix_kSearchRange[block][stage];
if (lTarget==SUBL) {
i=sInd;
if (sInd<20) {
WebRtcIlbcfix_AugmentedCbCorr(target, cbvectors + lMem,
interpSamplesFilt, cDot, sInd + 20,
WEBRTC_SPL_MIN(39, (eInd + 20)), scale);
i=20;
cDotPtr = &cDot[20 - sInd];
} else {
cDotPtr = cDot;
}
cb_vecPtr = cbvectors+lMem-20-i;
/* Calculate the cross correlations (main part of the filtered CB) */
WebRtcSpl_CrossCorrelation(cDotPtr, target, cb_vecPtr, lTarget,
eInd - i + 1, scale, -1);
} else {
cDotPtr = cDot;
cb_vecPtr = cbvectors+lMem-lTarget-sInd;
/* Calculate the cross correlations (main part of the filtered CB) */
WebRtcSpl_CrossCorrelation(cDotPtr, target, cb_vecPtr, lTarget,
eInd - sInd + 1, scale, -1);
}
/* Adjust the search range for the augmented vectors */
indexOffset=base_size+sInd;
/* Search for best index in this part of the vector */
WebRtcIlbcfix_CbSearchCore(
cDot, eInd-sInd+1, stage, inverseEnergy+indexOffset,
inverseEnergyShifts+indexOffset, Crit,
&indexNew, &CritNew, &CritNewSh);
/* Update the global best index and the corresponding gain */
WebRtcIlbcfix_CbUpdateBestIndex(
CritNew, CritNewSh, indexNew+indexOffset, cDot[indexNew],
inverseEnergy[indexNew+indexOffset], inverseEnergyShifts[indexNew+indexOffset],
&CritMax, &shTotMax, &bestIndex, &bestGain);
index[stage] = (int16_t)bestIndex;
bestGain = WebRtcIlbcfix_GainQuant(bestGain,
(int16_t)WEBRTC_SPL_ABS_W16(gains[stage]), stage, &gain_index[stage]);
/* Extract the best (according to measure) codebook vector
Also adjust the index, so that the augmented vectors are last.
Above these vectors were first...
*/
if(lTarget==(STATE_LEN-iLBCenc_inst->state_short_len)) {
if((size_t)index[stage]<base_size) {
pp=buf+lMem-lTarget-index[stage];
} else {
pp=cbvectors+lMem-lTarget-
index[stage]+base_size;
}
} else {
if ((size_t)index[stage]<base_size) {
if (index[stage]>=20) {
/* Adjust index and extract vector */
index[stage]-=20;
pp=buf+lMem-lTarget-index[stage];
} else {
/* Adjust index and extract vector */
index[stage]+=(int16_t)(base_size-20);
WebRtcIlbcfix_CreateAugmentedVec(index[stage]-base_size+40,
buf+lMem, aug_vec);
pp = aug_vec;
}
} else {
if ((index[stage] - base_size) >= 20) {
/* Adjust index and extract vector */
index[stage]-=20;
pp=cbvectors+lMem-lTarget-
index[stage]+base_size;
} else {
/* Adjust index and extract vector */
index[stage]+=(int16_t)(base_size-20);
WebRtcIlbcfix_CreateAugmentedVec(index[stage]-2*base_size+40,
cbvectors+lMem, aug_vec);
pp = aug_vec;
}
}
}
/* Subtract the best codebook vector, according
to measure, from the target vector */
WebRtcSpl_AddAffineVectorToVector(target, pp, (int16_t)(-bestGain),
(int32_t)8192, (int16_t)14, lTarget);
/* record quantized gain */
gains[stage+1] = bestGain;
} /* end of Main Loop. for (stage=0;... */
/* Calculte the coded vector (original target - what's left) */
for (i=0;i<lTarget;i++) {
codedVec[i]-=target[i];
}
/* Gain adjustment for energy matching */
codedEner = WebRtcSpl_DotProductWithScale(codedVec, codedVec, lTarget, scale);
j=gain_index[0];
temp1 = (int16_t)WebRtcSpl_NormW32(codedEner);
temp2 = (int16_t)WebRtcSpl_NormW32(targetEner);
if(temp1 < temp2) {
bits = 16 - temp1;
} else {
bits = 16 - temp2;
}
tmp = (int16_t)((gains[1] * gains[1]) >> 14);
targetEner = (int16_t)WEBRTC_SPL_SHIFT_W32(targetEner, -bits) * tmp;
tmpW32 = ((int32_t)(gains[1]-1))<<1;
/* Pointer to the table that contains
gain_sq5TblFIX * gain_sq5TblFIX in Q14 */
gainPtr=(int16_t*)WebRtcIlbcfix_kGainSq5Sq+gain_index[0];
temp1 = (int16_t)WEBRTC_SPL_SHIFT_W32(codedEner, -bits);
WebRtcIlbcfix_kGainSq5_ptr = (int16_t*)&WebRtcIlbcfix_kGainSq5[j];
/* targetEner and codedEner are in Q(-2*scale) */
for (ii=gain_index[0];ii<32;ii++) {
/* Change the index if
(codedEnergy*gainTbl[i]*gainTbl[i])<(targetEn*gain[0]*gain[0]) AND
gainTbl[i] < 2*gain[0]
*/
t32 = temp1 * *gainPtr;
t32 = t32 - targetEner;
if (t32 < 0) {
if ((*WebRtcIlbcfix_kGainSq5_ptr) < tmpW32) {
j=ii;
WebRtcIlbcfix_kGainSq5_ptr = (int16_t*)&WebRtcIlbcfix_kGainSq5[ii];
}
}
gainPtr++;
}
gain_index[0]=j;
return;
}

40
modules/audio_coding/codecs/ilbc/cb_search.h
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@ -1,40 +0,0 @@
/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_CbSearch.h
******************************************************************/
#ifndef MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_CB_SEARCH_H_
#define MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_CB_SEARCH_H_
#include <stddef.h>
#include <stdint.h>
#include "modules/audio_coding/codecs/ilbc/defines.h"
void WebRtcIlbcfix_CbSearch(
IlbcEncoder* iLBCenc_inst,
/* (i) the encoder state structure */
int16_t* index, /* (o) Codebook indices */
int16_t* gain_index, /* (o) Gain quantization indices */
int16_t* intarget, /* (i) Target vector for encoding */
int16_t* decResidual, /* (i) Decoded residual for codebook construction */
size_t lMem, /* (i) Length of buffer */
size_t lTarget, /* (i) Length of vector */
int16_t* weightDenum, /* (i) weighting filter coefficients in Q12 */
size_t block /* (i) the subblock number */
);
#endif

115
modules/audio_coding/codecs/ilbc/cb_search_core.c
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@ -1,115 +0,0 @@
/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_CbSearchCore.c
******************************************************************/
#include "modules/audio_coding/codecs/ilbc/cb_search_core.h"
#include "modules/audio_coding/codecs/ilbc/constants.h"
#include "modules/audio_coding/codecs/ilbc/defines.h"
void WebRtcIlbcfix_CbSearchCore(
int32_t *cDot, /* (i) Cross Correlation */
size_t range, /* (i) Search range */
int16_t stage, /* (i) Stage of this search */
int16_t *inverseEnergy, /* (i) Inversed energy */
int16_t *inverseEnergyShift, /* (i) Shifts of inversed energy
with the offset 2*16-29 */
int32_t *Crit, /* (o) The criteria */
size_t *bestIndex, /* (o) Index that corresponds to
maximum criteria (in this
vector) */
int32_t *bestCrit, /* (o) Value of critera for the
chosen index */
int16_t *bestCritSh) /* (o) The domain of the chosen
criteria */
{
int32_t maxW32, tmp32;
int16_t max, sh, tmp16;
size_t i;
int32_t *cDotPtr;
int16_t cDotSqW16;
int16_t *inverseEnergyPtr;
int32_t *critPtr;
int16_t *inverseEnergyShiftPtr;
/* Don't allow negative values for stage 0 */
if (stage==0) {
cDotPtr=cDot;
for (i=0;i<range;i++) {
*cDotPtr=WEBRTC_SPL_MAX(0, (*cDotPtr));
cDotPtr++;
}
}
/* Normalize cDot to int16_t, calculate the square of cDot and store the upper int16_t */
maxW32 = WebRtcSpl_MaxAbsValueW32(cDot, range);
sh = (int16_t)WebRtcSpl_NormW32(maxW32);
cDotPtr = cDot;
inverseEnergyPtr = inverseEnergy;
critPtr = Crit;
inverseEnergyShiftPtr=inverseEnergyShift;
max=WEBRTC_SPL_WORD16_MIN;
for (i=0;i<range;i++) {
/* Calculate cDot*cDot and put the result in a int16_t */
tmp32 = *cDotPtr << sh;
tmp16 = (int16_t)(tmp32 >> 16);
cDotSqW16 = (int16_t)(((int32_t)(tmp16)*(tmp16))>>16);
/* Calculate the criteria (cDot*cDot/energy) */
*critPtr = cDotSqW16 * *inverseEnergyPtr;
/* Extract the maximum shift value under the constraint
that the criteria is not zero */
if ((*critPtr)!=0) {
max = WEBRTC_SPL_MAX((*inverseEnergyShiftPtr), max);
}
inverseEnergyPtr++;
inverseEnergyShiftPtr++;
critPtr++;
cDotPtr++;
}
/* If no max shifts still at initialization value, set shift to zero */
if (max==WEBRTC_SPL_WORD16_MIN) {
max = 0;
}
/* Modify the criterias, so that all of them use the same Q domain */
critPtr=Crit;
inverseEnergyShiftPtr=inverseEnergyShift;
for (i=0;i<range;i++) {
/* Guarantee that the shift value is less than 16
in order to simplify for DSP's (and guard against >31) */
tmp16 = WEBRTC_SPL_MIN(16, max-(*inverseEnergyShiftPtr));
(*critPtr)=WEBRTC_SPL_SHIFT_W32((*critPtr),-tmp16);
critPtr++;
inverseEnergyShiftPtr++;
}
/* Find the index of the best value */
*bestIndex = WebRtcSpl_MaxIndexW32(Crit, range);
*bestCrit = Crit[*bestIndex];
/* Calculate total shifts of this criteria */
*bestCritSh = 32 - 2*sh + max;
return;
}

41
modules/audio_coding/codecs/ilbc/cb_search_core.h
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@ -1,41 +0,0 @@
/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_CbSearchCore.h
******************************************************************/
#ifndef MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_CB_SEARCH_CORE_H_
#define MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_CB_SEARCH_CORE_H_
#include <stddef.h>
#include <stdint.h>
void WebRtcIlbcfix_CbSearchCore(
int32_t* cDot, /* (i) Cross Correlation */
size_t range, /* (i) Search range */
int16_t stage, /* (i) Stage of this search */
int16_t* inverseEnergy, /* (i) Inversed energy */
int16_t* inverseEnergyShift, /* (i) Shifts of inversed energy
with the offset 2*16-29 */
int32_t* Crit, /* (o) The criteria */
size_t* bestIndex, /* (o) Index that corresponds to
maximum criteria (in this
vector) */
int32_t* bestCrit, /* (o) Value of critera for the
chosen index */
int16_t* bestCritSh); /* (o) The domain of the chosen
criteria */
#endif

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modules/audio_coding/codecs/ilbc/cb_update_best_index.c
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_CbUpdateBestIndex.c
******************************************************************/
#include "modules/audio_coding/codecs/ilbc/cb_update_best_index.h"
#include "modules/audio_coding/codecs/ilbc/constants.h"
#include "modules/audio_coding/codecs/ilbc/defines.h"
void WebRtcIlbcfix_CbUpdateBestIndex(
int32_t CritNew, /* (i) New Potentially best Criteria */
int16_t CritNewSh, /* (i) Shift value of above Criteria */
size_t IndexNew, /* (i) Index of new Criteria */
int32_t cDotNew, /* (i) Cross dot of new index */
int16_t invEnergyNew, /* (i) Inversed energy new index */
int16_t energyShiftNew, /* (i) Energy shifts of new index */
int32_t *CritMax, /* (i/o) Maximum Criteria (so far) */
int16_t *shTotMax, /* (i/o) Shifts of maximum criteria */
size_t *bestIndex, /* (i/o) Index that corresponds to
maximum criteria */
int16_t *bestGain) /* (i/o) Gain in Q14 that corresponds
to maximum criteria */
{
int16_t shOld, shNew, tmp16;
int16_t scaleTmp;
int32_t gainW32;
/* Normalize the new and old Criteria to the same domain */
if (CritNewSh>(*shTotMax)) {
shOld=WEBRTC_SPL_MIN(31,CritNewSh-(*shTotMax));
shNew=0;
} else {
shOld=0;
shNew=WEBRTC_SPL_MIN(31,(*shTotMax)-CritNewSh);
}
/* Compare the two criterias. If the new one is better,
calculate the gain and store this index as the new best one
*/
if ((CritNew >> shNew) > (*CritMax >> shOld)) {
tmp16 = (int16_t)WebRtcSpl_NormW32(cDotNew);
tmp16 = 16 - tmp16;
/* Calculate the gain in Q14
Compensate for inverseEnergyshift in Q29 and that the energy
value was stored in a int16_t (shifted down 16 steps)
=> 29-14+16 = 31 */
scaleTmp = -energyShiftNew-tmp16+31;
scaleTmp = WEBRTC_SPL_MIN(31, scaleTmp);
gainW32 = ((int16_t)WEBRTC_SPL_SHIFT_W32(cDotNew, -tmp16) * invEnergyNew) >>
scaleTmp;
/* Check if criteria satisfies Gain criteria (max 1.3)
if it is larger set the gain to 1.3
(slightly different from FLP version)
*/
if (gainW32>21299) {
*bestGain=21299;
} else if (gainW32<-21299) {
*bestGain=-21299;
} else {
*bestGain=(int16_t)gainW32;
}
*CritMax=CritNew;
*shTotMax=CritNewSh;
*bestIndex = IndexNew;
}
return;
}

39
modules/audio_coding/codecs/ilbc/cb_update_best_index.h
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_CbUpdateBestIndex.h
******************************************************************/
#ifndef MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_CB_UPDATE_BEST_INDEX_H_
#define MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_CB_UPDATE_BEST_INDEX_H_
#include <stddef.h>
#include <stdint.h>
void WebRtcIlbcfix_CbUpdateBestIndex(
int32_t CritNew, /* (i) New Potentially best Criteria */
int16_t CritNewSh, /* (i) Shift value of above Criteria */
size_t IndexNew, /* (i) Index of new Criteria */
int32_t cDotNew, /* (i) Cross dot of new index */
int16_t invEnergyNew, /* (i) Inversed energy new index */
int16_t energyShiftNew, /* (i) Energy shifts of new index */
int32_t* CritMax, /* (i/o) Maximum Criteria (so far) */
int16_t* shTotMax, /* (i/o) Shifts of maximum criteria */
size_t* bestIndex, /* (i/o) Index that corresponds to
maximum criteria */
int16_t* bestGain); /* (i/o) Gain in Q14 that corresponds
to maximum criteria */
#endif

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modules/audio_coding/codecs/ilbc/chebyshev.c
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_Chebyshev.c
******************************************************************/
#include "modules/audio_coding/codecs/ilbc/chebyshev.h"
#include "modules/audio_coding/codecs/ilbc/constants.h"
#include "modules/audio_coding/codecs/ilbc/defines.h"
/*------------------------------------------------------------------*
* Calculate the Chevyshev polynomial series
* F(w) = 2*exp(-j5w)*C(x)
* C(x) = (T_0(x) + f(1)T_1(x) + ... + f(4)T_1(x) + f(5)/2)
* T_i(x) is the i:th order Chebyshev polynomial
*------------------------------------------------------------------*/
int16_t WebRtcIlbcfix_Chebyshev(
/* (o) Result of C(x) */
int16_t x, /* (i) Value to the Chevyshev polynomial */
int16_t *f /* (i) The coefficients in the polynomial */
) {
int16_t b1_high, b1_low; /* Use the high, low format to increase the accuracy */
int32_t b2;
int32_t tmp1W32;
int32_t tmp2W32;
int i;
b2 = (int32_t)0x1000000; /* b2 = 1.0 (Q23) */
/* Calculate b1 = 2*x + f[1] */
tmp1W32 = (x << 10) + (f[1] << 14);
for (i = 2; i < 5; i++) {
tmp2W32 = tmp1W32;
/* Split b1 (in tmp1W32) into a high and low part */
b1_high = (int16_t)(tmp1W32 >> 16);
b1_low = (int16_t)((tmp1W32 - ((int32_t)b1_high << 16)) >> 1);
/* Calculate 2*x*b1-b2+f[i] */
tmp1W32 = ((b1_high * x + ((b1_low * x) >> 15)) << 2) - b2 + (f[i] << 14);
/* Update b2 for next round */
b2 = tmp2W32;
}
/* Split b1 (in tmp1W32) into a high and low part */
b1_high = (int16_t)(tmp1W32 >> 16);
b1_low = (int16_t)((tmp1W32 - ((int32_t)b1_high << 16)) >> 1);
/* tmp1W32 = x*b1 - b2 + f[i]/2 */
tmp1W32 = ((b1_high * x) << 1) + (((b1_low * x) >> 15) << 1) -
b2 + (f[i] << 13);
/* Handle overflows and set to maximum or minimum int16_t instead */
if (tmp1W32>((int32_t)33553408)) {
return(WEBRTC_SPL_WORD16_MAX);
} else if (tmp1W32<((int32_t)-33554432)) {
return(WEBRTC_SPL_WORD16_MIN);
} else {
return (int16_t)(tmp1W32 >> 10);
}
}

38
modules/audio_coding/codecs/ilbc/chebyshev.h
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_Chebyshev.h
******************************************************************/
#ifndef MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_CHEBYSHEV_H_
#define MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_CHEBYSHEV_H_
#include <stddef.h>
#include <stdint.h>
/*------------------------------------------------------------------*
* Calculate the Chevyshev polynomial series
* F(w) = 2*exp(-j5w)*C(x)
* C(x) = (T_0(x) + f(1)T_1(x) + ... + f(4)T_1(x) + f(5)/2)
* T_i(x) is the i:th order Chebyshev polynomial
*------------------------------------------------------------------*/
int16_t WebRtcIlbcfix_Chebyshev(
/* (o) Result of C(x) */
int16_t x, /* (i) Value to the Chevyshev polynomial */
int16_t* f /* (i) The coefficients in the polynomial */
);
#endif

51
modules/audio_coding/codecs/ilbc/comp_corr.c
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_CompCorr.c
******************************************************************/
#include "modules/audio_coding/codecs/ilbc/comp_corr.h"
#include "modules/audio_coding/codecs/ilbc/defines.h"
/*----------------------------------------------------------------*
* Compute cross correlation and pitch gain for pitch prediction
* of last subframe at given lag.
*---------------------------------------------------------------*/
void WebRtcIlbcfix_CompCorr(
int32_t *corr, /* (o) cross correlation */
int32_t *ener, /* (o) energy */
int16_t *buffer, /* (i) signal buffer */
size_t lag, /* (i) pitch lag */
size_t bLen, /* (i) length of buffer */
size_t sRange, /* (i) correlation search length */
int16_t scale /* (i) number of rightshifts to use */
){
int16_t *w16ptr;
w16ptr=&buffer[bLen-sRange-lag];
/* Calculate correlation and energy */
(*corr)=WebRtcSpl_DotProductWithScale(&buffer[bLen-sRange], w16ptr, sRange, scale);
(*ener)=WebRtcSpl_DotProductWithScale(w16ptr, w16ptr, sRange, scale);
/* For zero energy set the energy to 0 in order to avoid potential
problems for coming divisions */
if (*ener == 0) {
*corr = 0;
*ener = 1;
}
}

39
modules/audio_coding/codecs/ilbc/comp_corr.h
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_CompCorr.h
******************************************************************/
#ifndef MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_COMP_CORR_H_
#define MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_COMP_CORR_H_
#include <stddef.h>
#include <stdint.h>
/*----------------------------------------------------------------*
* Compute cross correlation and pitch gain for pitch prediction
* of last subframe at given lag.
*---------------------------------------------------------------*/
void WebRtcIlbcfix_CompCorr(int32_t* corr, /* (o) cross correlation */
int32_t* ener, /* (o) energy */
int16_t* buffer, /* (i) signal buffer */
size_t lag, /* (i) pitch lag */
size_t bLen, /* (i) length of buffer */
size_t sRange, /* (i) correlation search length */
int16_t scale /* (i) number of rightshifts to use */
);
#endif

57
modules/audio_coding/codecs/ilbc/complexityMeasures.m
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% % Copyright(c) 2011 The WebRTC project authors.All Rights Reserved.%
% Use of this source code is governed by a BSD
-
style license % that can be found in the LICENSE file in the root of the source
% tree.An additional intellectual property rights grant can be found
% in the file PATENTS.All contributing project authors may
% be found in the AUTHORS file in the root of the source tree.%
clear;
pack;
%
% Enter the path to YOUR executable and remember to define the perprocessor
% variable PRINT_MIPS te get the instructions printed to the screen.
%
command = '!iLBCtest.exe 30 speechAndBGnoise.pcm out1.bit out1.pcm tlm10_30ms.dat';
cout=' > st.txt'; %saves to matlab variable 'st'
eval(strcat(command,cout));
if(length(cout)>3)
load st.txt
else
disp('No cout file to load')
end
% initialize vector to zero
index = find(st(1:end,1)==-1);
indexnonzero = find(st(1:end,1)>0);
frames = length(index)-indexnonzero(1)+1;
start = indexnonzero(1) - 1;
functionOrder=max(st(:,2));
new=zeros(frames,functionOrder);
for i = 1:frames,
for j = index(start-1+i)+1:(index(start+i)-1),
new(i,st(j,2)) = new(i,st(j,2)) + st(j,1);
end
end
result=zeros(functionOrder,3);
for i=1:functionOrder
nonzeroelements = find(new(1:end,i)>0);
result(i,1)=i;
% Compute each function's mean complexity
% result(i,2)=(sum(new(nonzeroelements,i))/(length(nonzeroelements)*0.03))/1000000;
% Compute each function's maximum complexity in encoding
% and decoding respectively and then add it together:
% result(i,3)=(max(new(1:end,i))/0.03)/1000000;
result(i,3)=(max(new(1:size(new,1)/2,i))/0.03)/1000000 + (max(new(size(new,1)/2+1:end,i))/0.03)/1000000;
end
result
% Compute maximum complexity for a single frame (enc/dec separately and together)
maxEncComplexityInAFrame = (max(sum(new(1:size(new,1)/2,:),2))/0.03)/1000000
maxDecComplexityInAFrame = (max(sum(new(size(new,1)/2+1:end,:),2))/0.03)/1000000
totalComplexity = maxEncComplexityInAFrame + maxDecComplexityInAFrame

667
modules/audio_coding/codecs/ilbc/constants.c
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@ -1,667 +0,0 @@
/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
constants.c
******************************************************************/
#include "modules/audio_coding/codecs/ilbc/constants.h"
#include "modules/audio_coding/codecs/ilbc/defines.h"
/* HP Filters {b[0] b[1] b[2] -a[1] -a[2]} */
const int16_t WebRtcIlbcfix_kHpInCoefs[5] = {3798, -7596, 3798, 7807, -3733};
const int16_t WebRtcIlbcfix_kHpOutCoefs[5] = {3849, -7699, 3849, 7918, -3833};
/* Window in Q11 to window the energies of the 5 choises (3 for 20ms) in the choise for
the 80 sample start state
*/
const int16_t WebRtcIlbcfix_kStartSequenceEnrgWin[NSUB_MAX-1]= {
1638, 1843, 2048, 1843, 1638
};
/* LP Filter coeffs used for downsampling */
const int16_t WebRtcIlbcfix_kLpFiltCoefs[FILTERORDER_DS_PLUS1]= {
-273, 512, 1297, 1696, 1297, 512, -273
};
/* Constants used in the LPC calculations */
/* Hanning LPC window (in Q15) */
const int16_t WebRtcIlbcfix_kLpcWin[BLOCKL_MAX] = {
6, 22, 50, 89, 139, 200, 272, 355, 449, 554, 669, 795,
932, 1079, 1237, 1405, 1583, 1771, 1969, 2177, 2395, 2622, 2858, 3104,
3359, 3622, 3894, 4175, 4464, 4761, 5066, 5379, 5699, 6026, 6361, 6702,
7050, 7404, 7764, 8130, 8502, 8879, 9262, 9649, 10040, 10436, 10836, 11240,
11647, 12058, 12471, 12887, 13306, 13726, 14148, 14572, 14997, 15423, 15850, 16277,
16704, 17131, 17558, 17983, 18408, 18831, 19252, 19672, 20089, 20504, 20916, 21325,
21730, 22132, 22530, 22924, 23314, 23698, 24078, 24452, 24821, 25185, 25542, 25893,
26238, 26575, 26906, 27230, 27547, 27855, 28156, 28450, 28734, 29011, 29279, 29538,
29788, 30029, 30261, 30483, 30696, 30899, 31092, 31275, 31448, 31611, 31764, 31906,
32037, 32158, 32268, 32367, 32456, 32533, 32600, 32655, 32700, 32733, 32755, 32767,
32767, 32755, 32733, 32700, 32655, 32600, 32533, 32456, 32367, 32268, 32158, 32037,
31906, 31764, 31611, 31448, 31275, 31092, 30899, 30696, 30483, 30261, 30029, 29788,
29538, 29279, 29011, 28734, 28450, 28156, 27855, 27547, 27230, 26906, 26575, 26238,
25893, 25542, 25185, 24821, 24452, 24078, 23698, 23314, 22924, 22530, 22132, 21730,
21325, 20916, 20504, 20089, 19672, 19252, 18831, 18408, 17983, 17558, 17131, 16704,
16277, 15850, 15423, 14997, 14572, 14148, 13726, 13306, 12887, 12471, 12058, 11647,
11240, 10836, 10436, 10040, 9649, 9262, 8879, 8502, 8130, 7764, 7404, 7050,
6702, 6361, 6026, 5699, 5379, 5066, 4761, 4464, 4175, 3894, 3622, 3359,
3104, 2858, 2622, 2395, 2177, 1969, 1771, 1583, 1405, 1237, 1079, 932,
795, 669, 554, 449, 355, 272, 200, 139, 89, 50, 22, 6
};
/* Asymmetric LPC window (in Q15)*/
const int16_t WebRtcIlbcfix_kLpcAsymWin[BLOCKL_MAX] = {
2, 7, 15, 27, 42, 60, 81, 106, 135, 166, 201, 239,
280, 325, 373, 424, 478, 536, 597, 661, 728, 798, 872, 949,
1028, 1111, 1197, 1287, 1379, 1474, 1572, 1674, 1778, 1885, 1995, 2108,
2224, 2343, 2465, 2589, 2717, 2847, 2980, 3115, 3254, 3395, 3538, 3684,
3833, 3984, 4138, 4295, 4453, 4615, 4778, 4944, 5112, 5283, 5456, 5631,
5808, 5987, 6169, 6352, 6538, 6725, 6915, 7106, 7300, 7495, 7692, 7891,
8091, 8293, 8497, 8702, 8909, 9118, 9328, 9539, 9752, 9966, 10182, 10398,
10616, 10835, 11055, 11277, 11499, 11722, 11947, 12172, 12398, 12625, 12852, 13080,
13309, 13539, 13769, 14000, 14231, 14463, 14695, 14927, 15160, 15393, 15626, 15859,
16092, 16326, 16559, 16792, 17026, 17259, 17492, 17725, 17957, 18189, 18421, 18653,
18884, 19114, 19344, 19573, 19802, 20030, 20257, 20483, 20709, 20934, 21157, 21380,
21602, 21823, 22042, 22261, 22478, 22694, 22909, 23123, 23335, 23545, 23755, 23962,
24168, 24373, 24576, 24777, 24977, 25175, 25371, 25565, 25758, 25948, 26137, 26323,
26508, 26690, 26871, 27049, 27225, 27399, 27571, 27740, 27907, 28072, 28234, 28394,
28552, 28707, 28860, 29010, 29157, 29302, 29444, 29584, 29721, 29855, 29987, 30115,
30241, 30364, 30485, 30602, 30717, 30828, 30937, 31043, 31145, 31245, 31342, 31436,
31526, 31614, 31699, 31780, 31858, 31933, 32005, 32074, 32140, 32202, 32261, 32317,
32370, 32420, 32466, 32509, 32549, 32585, 32618, 32648, 32675, 32698, 32718, 32734,
32748, 32758, 32764, 32767, 32767, 32667, 32365, 31863, 31164, 30274, 29197, 27939,
26510, 24917, 23170, 21281, 19261, 17121, 14876, 12540, 10126, 7650, 5126, 2571
};
/* Lag window for LPC (Q31) */
const int32_t WebRtcIlbcfix_kLpcLagWin[LPC_FILTERORDER + 1]={
2147483647, 2144885453, 2137754373, 2125918626, 2109459810,
2088483140, 2063130336, 2033564590, 1999977009, 1962580174,
1921610283};
/* WebRtcIlbcfix_kLpcChirpSyntDenum vector in Q15 corresponding
* floating point vector {1 0.9025 0.9025^2 0.9025^3 ...}
*/
const int16_t WebRtcIlbcfix_kLpcChirpSyntDenum[LPC_FILTERORDER + 1] = {
32767, 29573, 26690, 24087,
21739, 19619, 17707, 15980,
14422, 13016, 11747};
/* WebRtcIlbcfix_kLpcChirpWeightDenum in Q15 corresponding to
* floating point vector {1 0.4222 0.4222^2... }
*/
const int16_t WebRtcIlbcfix_kLpcChirpWeightDenum[LPC_FILTERORDER + 1] = {
32767, 13835, 5841, 2466, 1041, 440,
186, 78, 33, 14, 6};
/* LSF quantization Q13 domain */
const int16_t WebRtcIlbcfix_kLsfCb[64 * 3 + 128 * 3 + 128 * 4] = {
1273, 2238, 3696,
3199, 5309, 8209,
3606, 5671, 7829,
2815, 5262, 8778,
2608, 4027, 5493,
1582, 3076, 5945,
2983, 4181, 5396,
2437, 4322, 6902,
1861, 2998, 4613,
2007, 3250, 5214,
1388, 2459, 4262,
2563, 3805, 5269,
2036, 3522, 5129,
1935, 4025, 6694,
2744, 5121, 7338,
2810, 4248, 5723,
3054, 5405, 7745,
1449, 2593, 4763,
3411, 5128, 6596,
2484, 4659, 7496,
1668, 2879, 4818,
1812, 3072, 5036,
1638, 2649, 3900,
2464, 3550, 4644,
1853, 2900, 4158,
2458, 4163, 5830,
2556, 4036, 6254,
2703, 4432, 6519,
3062, 4953, 7609,
1725, 3703, 6187,
2221, 3877, 5427,
2339, 3579, 5197,
2021, 4633, 7037,
2216, 3328, 4535,
2961, 4739, 6667,
2807, 3955, 5099,
2788, 4501, 6088,
1642, 2755, 4431,
3341, 5282, 7333,
2414, 3726, 5727,
1582, 2822, 5269,
2259, 3447, 4905,
3117, 4986, 7054,
1825, 3491, 5542,
3338, 5736, 8627,
1789, 3090, 5488,
2566, 3720, 4923,
2846, 4682, 7161,
1950, 3321, 5976,
1834, 3383, 6734,
3238, 4769, 6094,
2031, 3978, 5903,
1877, 4068, 7436,
2131, 4644, 8296,
2764, 5010, 8013,
2194, 3667, 6302,
2053, 3127, 4342,
3523, 6595, 10010,
3134, 4457, 5748,
3142, 5819, 9414,
2223, 4334, 6353,
2022, 3224, 4822,
2186, 3458, 5544,
2552, 4757, 6870,
10905, 12917, 14578,
9503, 11485, 14485,
9518, 12494, 14052,
6222, 7487, 9174,
7759, 9186, 10506,
8315, 12755, 14786,
9609, 11486, 13866,
8909, 12077, 13643,
7369, 9054, 11520,
9408, 12163, 14715,
6436, 9911, 12843,
7109, 9556, 11884,
7557, 10075, 11640,
6482, 9202, 11547,
6463, 7914, 10980,
8611, 10427, 12752,
7101, 9676, 12606,
7428, 11252, 13172,
10197, 12955, 15842,
7487, 10955, 12613,
5575, 7858, 13621,
7268, 11719, 14752,
7476, 11744, 13795,
7049, 8686, 11922,
8234, 11314, 13983,
6560, 11173, 14984,
6405, 9211, 12337,
8222, 12054, 13801,
8039, 10728, 13255,
10066, 12733, 14389,
6016, 7338, 10040,
6896, 8648, 10234,
7538, 9170, 12175,
7327, 12608, 14983,
10516, 12643, 15223,
5538, 7644, 12213,
6728, 12221, 14253,
7563, 9377, 12948,
8661, 11023, 13401,
7280, 8806, 11085,
7723, 9793, 12333,
12225, 14648, 16709,
8768, 13389, 15245,
10267, 12197, 13812,
5301, 7078, 11484,
7100, 10280, 11906,
8716, 12555, 14183,
9567, 12464, 15434,
7832, 12305, 14300,
7608, 10556, 12121,
8913, 11311, 12868,
7414, 9722, 11239,
8666, 11641, 13250,
9079, 10752, 12300,
8024, 11608, 13306,
10453, 13607, 16449,
8135, 9573, 10909,
6375, 7741, 10125,
10025, 12217, 14874,
6985, 11063, 14109,
9296, 13051, 14642,
8613, 10975, 12542,
6583, 10414, 13534,
6191, 9368, 13430,
5742, 6859, 9260,
7723, 9813, 13679,
8137, 11291, 12833,
6562, 8973, 10641,
6062, 8462, 11335,
6928, 8784, 12647,
7501, 8784, 10031,
8372, 10045, 12135,
8191, 9864, 12746,
5917, 7487, 10979,
5516, 6848, 10318,
6819, 9899, 11421,
7882, 12912, 15670,
9558, 11230, 12753,
7752, 9327, 11472,
8479, 9980, 11358,
11418, 14072, 16386,
7968, 10330, 14423,
8423, 10555, 12162,
6337, 10306, 14391,
8850, 10879, 14276,
6750, 11885, 15710,
7037, 8328, 9764,
6914, 9266, 13476,
9746, 13949, 15519,
11032, 14444, 16925,
8032, 10271, 11810,
10962, 13451, 15833,
10021, 11667, 13324,
6273, 8226, 12936,
8543, 10397, 13496,
7936, 10302, 12745,
6769, 8138, 10446,
6081, 7786, 11719,
8637, 11795, 14975,
8790, 10336, 11812,
7040, 8490, 10771,
7338, 10381, 13153,
6598, 7888, 9358,
6518, 8237, 12030,
9055, 10763, 12983,
6490, 10009, 12007,
9589, 12023, 13632,
6867, 9447, 10995,
7930, 9816, 11397,
10241, 13300, 14939,
5830, 8670, 12387,
9870, 11915, 14247,
9318, 11647, 13272,
6721, 10836, 12929,
6543, 8233, 9944,
8034, 10854, 12394,
9112, 11787, 14218,
9302, 11114, 13400,
9022, 11366, 13816,
6962, 10461, 12480,
11288, 13333, 15222,
7249, 8974, 10547,
10566, 12336, 14390,
6697, 11339, 13521,
11851, 13944, 15826,
6847, 8381, 11349,
7509, 9331, 10939,
8029, 9618, 11909,
13973, 17644, 19647, 22474,
14722, 16522, 20035, 22134,
16305, 18179, 21106, 23048,
15150, 17948, 21394, 23225,
13582, 15191, 17687, 22333,
11778, 15546, 18458, 21753,
16619, 18410, 20827, 23559,
14229, 15746, 17907, 22474,
12465, 15327, 20700, 22831,
15085, 16799, 20182, 23410,
13026, 16935, 19890, 22892,
14310, 16854, 19007, 22944,
14210, 15897, 18891, 23154,
14633, 18059, 20132, 22899,
15246, 17781, 19780, 22640,
16396, 18904, 20912, 23035,
14618, 17401, 19510, 21672,
15473, 17497, 19813, 23439,
18851, 20736, 22323, 23864,
15055, 16804, 18530, 20916,
16490, 18196, 19990, 21939,
11711, 15223, 21154, 23312,
13294, 15546, 19393, 21472,
12956, 16060, 20610, 22417,
11628, 15843, 19617, 22501,
14106, 16872, 19839, 22689,
15655, 18192, 20161, 22452,
12953, 15244, 20619, 23549,
15322, 17193, 19926, 21762,
16873, 18676, 20444, 22359,
14874, 17871, 20083, 21959,
11534, 14486, 19194, 21857,
17766, 19617, 21338, 23178,
13404, 15284, 19080, 23136,
15392, 17527, 19470, 21953,
14462, 16153, 17985, 21192,
17734, 19750, 21903, 23783,
16973, 19096, 21675, 23815,
16597, 18936, 21257, 23461,
15966, 17865, 20602, 22920,
15416, 17456, 20301, 22972,
18335, 20093, 21732, 23497,
15548, 17217, 20679, 23594,
15208, 16995, 20816, 22870,
13890, 18015, 20531, 22468,
13211, 15377, 19951, 22388,
12852, 14635, 17978, 22680,
16002, 17732, 20373, 23544,
11373, 14134, 19534, 22707,
17329, 19151, 21241, 23462,
15612, 17296, 19362, 22850,
15422, 19104, 21285, 23164,
13792, 17111, 19349, 21370,
15352, 17876, 20776, 22667,
15253, 16961, 18921, 22123,
14108, 17264, 20294, 23246,
15785, 17897, 20010, 21822,
17399, 19147, 20915, 22753,
13010, 15659, 18127, 20840,
16826, 19422, 22218, 24084,
18108, 20641, 22695, 24237,
18018, 20273, 22268, 23920,
16057, 17821, 21365, 23665,
16005, 17901, 19892, 23016,
13232, 16683, 21107, 23221,
13280, 16615, 19915, 21829,
14950, 18575, 20599, 22511,
16337, 18261, 20277, 23216,
14306, 16477, 21203, 23158,
12803, 17498, 20248, 22014,
14327, 17068, 20160, 22006,
14402, 17461, 21599, 23688,
16968, 18834, 20896, 23055,
15070, 17157, 20451, 22315,
15419, 17107, 21601, 23946,
16039, 17639, 19533, 21424,
16326, 19261, 21745, 23673,
16489, 18534, 21658, 23782,
16594, 18471, 20549, 22807,
18973, 21212, 22890, 24278,
14264, 18674, 21123, 23071,
15117, 16841, 19239, 23118,
13762, 15782, 20478, 23230,
14111, 15949, 20058, 22354,
14990, 16738, 21139, 23492,
13735, 16971, 19026, 22158,
14676, 17314, 20232, 22807,
16196, 18146, 20459, 22339,
14747, 17258, 19315, 22437,
14973, 17778, 20692, 23367,
15715, 17472, 20385, 22349,
15702, 18228, 20829, 23410,
14428, 16188, 20541, 23630,
16824, 19394, 21365, 23246,
13069, 16392, 18900, 21121,
12047, 16640, 19463, 21689,
14757, 17433, 19659, 23125,
15185, 16930, 19900, 22540,
16026, 17725, 19618, 22399,
16086, 18643, 21179, 23472,
15462, 17248, 19102, 21196,
17368, 20016, 22396, 24096,
12340, 14475, 19665, 23362,
13636, 16229, 19462, 22728,
14096, 16211, 19591, 21635,
12152, 14867, 19943, 22301,
14492, 17503, 21002, 22728,
14834, 16788, 19447, 21411,
14650, 16433, 19326, 22308,
14624, 16328, 19659, 23204,
13888, 16572, 20665, 22488,
12977, 16102, 18841, 22246,
15523, 18431, 21757, 23738,
14095, 16349, 18837, 20947,
13266, 17809, 21088, 22839,
15427, 18190, 20270, 23143,
11859, 16753, 20935, 22486,
12310, 17667, 21736, 23319,
14021, 15926, 18702, 22002,
12286, 15299, 19178, 21126,
15703, 17491, 21039, 23151,
12272, 14018, 18213, 22570,
14817, 16364, 18485, 22598,
17109, 19683, 21851, 23677,
12657, 14903, 19039, 22061,
14713, 16487, 20527, 22814,
14635, 16726, 18763, 21715,
15878, 18550, 20718, 22906
};
const int16_t WebRtcIlbcfix_kLsfDimCb[LSF_NSPLIT] = {3, 3, 4};
const int16_t WebRtcIlbcfix_kLsfSizeCb[LSF_NSPLIT] = {64,128,128};
const int16_t WebRtcIlbcfix_kLsfMean[LPC_FILTERORDER] = {
2308, 3652, 5434, 7885,
10255, 12559, 15160, 17513,
20328, 22752};
const int16_t WebRtcIlbcfix_kLspMean[LPC_FILTERORDER] = {
31476, 29565, 25819, 18725, 10276,
1236, -9049, -17600, -25884, -30618
};
/* Q14 */
const int16_t WebRtcIlbcfix_kLsfWeight20ms[4] = {12288, 8192, 4096, 0};
const int16_t WebRtcIlbcfix_kLsfWeight30ms[6] = {8192, 16384, 10923, 5461, 0, 0};
/*
cos(x) in Q15
WebRtcIlbcfix_kCos[i] = cos(pi*i/64.0)
used in WebRtcIlbcfix_Lsp2Lsf()
*/
const int16_t WebRtcIlbcfix_kCos[64] = {
32767, 32729, 32610, 32413, 32138, 31786, 31357, 30853,
30274, 29622, 28899, 28106, 27246, 26320, 25330, 24279,
23170, 22006, 20788, 19520, 18205, 16846, 15447, 14010,
12540, 11039, 9512, 7962, 6393, 4808, 3212, 1608,
0, -1608, -3212, -4808, -6393, -7962, -9512, -11039,
-12540, -14010, -15447, -16846, -18205, -19520, -20788, -22006,
-23170, -24279, -25330, -26320, -27246, -28106, -28899, -29622,
-30274, -30853, -31357, -31786, -32138, -32413, -32610, -32729
};
/*
Derivative in Q19, used to interpolate between the
WebRtcIlbcfix_kCos[] values to get a more exact y = cos(x)
*/
const int16_t WebRtcIlbcfix_kCosDerivative[64] = {
-632, -1893, -3150, -4399, -5638, -6863, -8072, -9261,
-10428, -11570, -12684, -13767, -14817, -15832, -16808, -17744,
-18637, -19486, -20287, -21039, -21741, -22390, -22986, -23526,
-24009, -24435, -24801, -25108, -25354, -25540, -25664, -25726,
-25726, -25664, -25540, -25354, -25108, -24801, -24435, -24009,
-23526, -22986, -22390, -21741, -21039, -20287, -19486, -18637,
-17744, -16808, -15832, -14817, -13767, -12684, -11570, -10428,
-9261, -8072, -6863, -5638, -4399, -3150, -1893, -632};
/*
Table in Q15, used for a2lsf conversion
WebRtcIlbcfix_kCosGrid[i] = cos((2*pi*i)/(float)(2*COS_GRID_POINTS));
*/
const int16_t WebRtcIlbcfix_kCosGrid[COS_GRID_POINTS + 1] = {
32760, 32723, 32588, 32364, 32051, 31651, 31164, 30591,
29935, 29196, 28377, 27481, 26509, 25465, 24351, 23170,
21926, 20621, 19260, 17846, 16384, 14876, 13327, 11743,
10125, 8480, 6812, 5126, 3425, 1714, 0, -1714, -3425,
-5126, -6812, -8480, -10125, -11743, -13327, -14876,
-16384, -17846, -19260, -20621, -21926, -23170, -24351,
-25465, -26509, -27481, -28377, -29196, -29935, -30591,
-31164, -31651, -32051, -32364, -32588, -32723, -32760
};
/*
Derivative of y = acos(x) in Q12
used in WebRtcIlbcfix_Lsp2Lsf()
*/
const int16_t WebRtcIlbcfix_kAcosDerivative[64] = {
-26887, -8812, -5323, -3813, -2979, -2444, -2081, -1811,
-1608, -1450, -1322, -1219, -1132, -1059, -998, -946,
-901, -861, -827, -797, -772, -750, -730, -713,
-699, -687, -677, -668, -662, -657, -654, -652,
-652, -654, -657, -662, -668, -677, -687, -699,
-713, -730, -750, -772, -797, -827, -861, -901,
-946, -998, -1059, -1132, -1219, -1322, -1450, -1608,
-1811, -2081, -2444, -2979, -3813, -5323, -8812, -26887
};
/* Tables for quantization of start state */
/* State quantization tables */
const int16_t WebRtcIlbcfix_kStateSq3[8] = { /* Values in Q13 */
-30473, -17838, -9257, -2537,
3639, 10893, 19958, 32636
};
/* This table defines the limits for the selection of the freqg
less or equal than value 0 => index = 0
less or equal than value k => index = k
*/
const int32_t WebRtcIlbcfix_kChooseFrgQuant[64] = {
118, 163, 222, 305, 425, 604,
851, 1174, 1617, 2222, 3080, 4191,
5525, 7215, 9193, 11540, 14397, 17604,
21204, 25209, 29863, 35720, 42531, 50375,
59162, 68845, 80108, 93754, 110326, 129488,
150654, 174328, 201962, 233195, 267843, 308239,
354503, 405988, 464251, 531550, 608652, 697516,
802526, 928793, 1080145, 1258120, 1481106, 1760881,
2111111, 2546619, 3078825, 3748642, 4563142, 5573115,
6887601, 8582108, 10797296, 14014513, 18625760, 25529599,
37302935, 58819185, 109782723, WEBRTC_SPL_WORD32_MAX
};
const int16_t WebRtcIlbcfix_kScale[64] = {
/* Values in Q16 */
29485, 25003, 21345, 18316, 15578, 13128, 10973, 9310, 7955,
6762, 5789, 4877, 4255, 3699, 3258, 2904, 2595, 2328,
2123, 1932, 1785, 1631, 1493, 1370, 1260, 1167, 1083,
/* Values in Q21 */
32081, 29611, 27262, 25229, 23432, 21803, 20226, 18883, 17609,
16408, 15311, 14327, 13390, 12513, 11693, 10919, 10163, 9435,
8739, 8100, 7424, 6813, 6192, 5648, 5122, 4639, 4207, 3798,
3404, 3048, 2706, 2348, 2036, 1713, 1393, 1087, 747
};
/*frgq in fixpoint, but already computed like this:
for(i=0; i<64; i++){
a = (pow(10,frgq[i])/4.5);
WebRtcIlbcfix_kFrgQuantMod[i] = round(a);
}
Value 0 :36 in Q8
37:58 in Q5
59:63 in Q3
*/
const int16_t WebRtcIlbcfix_kFrgQuantMod[64] = {
/* First 37 values in Q8 */
569, 671, 786, 916, 1077, 1278,
1529, 1802, 2109, 2481, 2898, 3440,
3943, 4535, 5149, 5778, 6464, 7208,
7904, 8682, 9397, 10285, 11240, 12246,
13313, 14382, 15492, 16735, 18131, 19693,
21280, 22912, 24624, 26544, 28432, 30488,
32720,
/* 22 values in Q5 */
4383, 4684, 5012, 5363, 5739, 6146,
6603, 7113, 7679, 8285, 9040, 9850,
10838, 11882, 13103, 14467, 15950, 17669,
19712, 22016, 24800, 28576,
/* 5 values in Q3 */
8240, 9792, 12040, 15440, 22472
};
/* Constants for codebook search and creation */
/* Expansion filter to get additional cb section.
* Q12 and reversed compared to flp
*/
const int16_t WebRtcIlbcfix_kCbFiltersRev[CB_FILTERLEN]={
-140, 446, -755, 3302, 2922, -590, 343, -138};
/* Weighting coefficients for short lags.
* [0.2 0.4 0.6 0.8] in Q15 */
const int16_t WebRtcIlbcfix_kAlpha[4]={
6554, 13107, 19661, 26214};
/* Ranges for search and filters at different subframes */
const size_t WebRtcIlbcfix_kSearchRange[5][CB_NSTAGES]={
{58,58,58}, {108,44,44}, {108,108,108}, {108,108,108}, {108,108,108}};
const size_t WebRtcIlbcfix_kFilterRange[5]={63, 85, 125, 147, 147};
/* Gain Quantization for the codebook gains of the 3 stages */
/* Q14 (one extra value (max int16_t) to simplify for the search) */
const int16_t WebRtcIlbcfix_kGainSq3[9]={
-16384, -10813, -5407, 0, 4096, 8192,
12288, 16384, 32767};
/* Q14 (one extra value (max int16_t) to simplify for the search) */
const int16_t WebRtcIlbcfix_kGainSq4[17]={
-17203, -14746, -12288, -9830, -7373, -4915,
-2458, 0, 2458, 4915, 7373, 9830,
12288, 14746, 17203, 19661, 32767};
/* Q14 (one extra value (max int16_t) to simplify for the search) */
const int16_t WebRtcIlbcfix_kGainSq5[33]={
614, 1229, 1843, 2458, 3072, 3686,
4301, 4915, 5530, 6144, 6758, 7373,
7987, 8602, 9216, 9830, 10445, 11059,
11674, 12288, 12902, 13517, 14131, 14746,
15360, 15974, 16589, 17203, 17818, 18432,
19046, 19661, 32767};
/* Q14 gain_sq5Tbl squared in Q14 */
const int16_t WebRtcIlbcfix_kGainSq5Sq[32] = {
23, 92, 207, 368, 576, 829,
1129, 1474, 1866, 2304, 2787, 3317,
3893, 4516, 5184, 5897, 6658, 7464,
8318, 9216, 10160, 11151, 12187, 13271,
14400, 15574, 16796, 18062, 19377, 20736,
22140, 23593
};
const int16_t* const WebRtcIlbcfix_kGain[3] =
{WebRtcIlbcfix_kGainSq5, WebRtcIlbcfix_kGainSq4, WebRtcIlbcfix_kGainSq3};
/* Tables for the Enhancer, using upsamling factor 4 (ENH_UPS0 = 4) */
const int16_t WebRtcIlbcfix_kEnhPolyPhaser[ENH_UPS0][ENH_FLO_MULT2_PLUS1]={
{0, 0, 0, 4096, 0, 0, 0},
{64, -315, 1181, 3531, -436, 77, -64},
{97, -509, 2464, 2464, -509, 97, -97},
{77, -436, 3531, 1181, -315, 64, -77}
};
const int16_t WebRtcIlbcfix_kEnhWt[3] = {
4800, 16384, 27968 /* Q16 */
};
const size_t WebRtcIlbcfix_kEnhPlocs[ENH_NBLOCKS_TOT] = {
160, 480, 800, 1120, 1440, 1760, 2080, 2400 /* Q(-2) */
};
/* PLC table */
const int16_t WebRtcIlbcfix_kPlcPerSqr[6] = { /* Grid points for square of periodiciy in Q15 */
839, 1343, 2048, 2998, 4247, 5849
};
const int16_t WebRtcIlbcfix_kPlcPitchFact[6] = { /* Value of y=(x^4-0.4)/(0.7-0.4) in grid points in Q15 */
0, 5462, 10922, 16384, 21846, 27306
};
const int16_t WebRtcIlbcfix_kPlcPfSlope[6] = { /* Slope of y=(x^4-0.4)/(0.7-0.4) in Q11 */
26667, 18729, 13653, 10258, 7901, 6214
};

95
modules/audio_coding/codecs/ilbc/constants.h
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
constants.h
******************************************************************/
#ifndef MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_CONSTANTS_H_
#define MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_CONSTANTS_H_
#include <stddef.h>
#include <stdint.h>
#include "modules/audio_coding/codecs/ilbc/defines.h"
/* high pass filters */
extern const int16_t WebRtcIlbcfix_kHpInCoefs[];
extern const int16_t WebRtcIlbcfix_kHpOutCoefs[];
/* Window for start state decision */
extern const int16_t WebRtcIlbcfix_kStartSequenceEnrgWin[];
/* low pass filter used for downsampling */
extern const int16_t WebRtcIlbcfix_kLpFiltCoefs[];
/* LPC analysis and quantization */
extern const int16_t WebRtcIlbcfix_kLpcWin[];
extern const int16_t WebRtcIlbcfix_kLpcAsymWin[];
extern const int32_t WebRtcIlbcfix_kLpcLagWin[];
extern const int16_t WebRtcIlbcfix_kLpcChirpSyntDenum[];
extern const int16_t WebRtcIlbcfix_kLpcChirpWeightDenum[];
extern const int16_t WebRtcIlbcfix_kLsfDimCb[];
extern const int16_t WebRtcIlbcfix_kLsfSizeCb[];
extern const int16_t WebRtcIlbcfix_kLsfCb[];
extern const int16_t WebRtcIlbcfix_kLsfWeight20ms[];
extern const int16_t WebRtcIlbcfix_kLsfWeight30ms[];
extern const int16_t WebRtcIlbcfix_kLsfMean[];
extern const int16_t WebRtcIlbcfix_kLspMean[];
extern const int16_t WebRtcIlbcfix_kCos[];
extern const int16_t WebRtcIlbcfix_kCosDerivative[];
extern const int16_t WebRtcIlbcfix_kCosGrid[];
extern const int16_t WebRtcIlbcfix_kAcosDerivative[];
/* state quantization tables */
extern const int16_t WebRtcIlbcfix_kStateSq3[];
extern const int32_t WebRtcIlbcfix_kChooseFrgQuant[];
extern const int16_t WebRtcIlbcfix_kScale[];
extern const int16_t WebRtcIlbcfix_kFrgQuantMod[];
/* Ranges for search and filters at different subframes */
extern const size_t WebRtcIlbcfix_kSearchRange[5][CB_NSTAGES];
extern const size_t WebRtcIlbcfix_kFilterRange[];
/* gain quantization tables */
extern const int16_t WebRtcIlbcfix_kGainSq3[];
extern const int16_t WebRtcIlbcfix_kGainSq4[];
extern const int16_t WebRtcIlbcfix_kGainSq5[];
extern const int16_t WebRtcIlbcfix_kGainSq5Sq[];
extern const int16_t* const WebRtcIlbcfix_kGain[];
/* adaptive codebook definitions */
extern const int16_t WebRtcIlbcfix_kCbFiltersRev[];
extern const int16_t WebRtcIlbcfix_kAlpha[];
/* enhancer definitions */
extern const int16_t WebRtcIlbcfix_kEnhPolyPhaser[ENH_UPS0]
[ENH_FLO_MULT2_PLUS1];
extern const int16_t WebRtcIlbcfix_kEnhWt[];
extern const size_t WebRtcIlbcfix_kEnhPlocs[];
/* PLC tables */
extern const int16_t WebRtcIlbcfix_kPlcPerSqr[];
extern const int16_t WebRtcIlbcfix_kPlcPitchFact[];
extern const int16_t WebRtcIlbcfix_kPlcPfSlope[];
#endif

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modules/audio_coding/codecs/ilbc/create_augmented_vec.c
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_CreateAugmentedVec.c
******************************************************************/
#include "modules/audio_coding/codecs/ilbc/create_augmented_vec.h"
#include "common_audio/signal_processing/include/signal_processing_library.h"
#include "modules/audio_coding/codecs/ilbc/constants.h"
#include "modules/audio_coding/codecs/ilbc/defines.h"
#include "rtc_base/sanitizer.h"
/*----------------------------------------------------------------*
* Recreate a specific codebook vector from the augmented part.
*
*----------------------------------------------------------------*/
void WebRtcIlbcfix_CreateAugmentedVec(
size_t index, /* (i) Index for the augmented vector to be
created */
const int16_t* buffer, /* (i) Pointer to the end of the codebook memory
that is used for creation of the augmented
codebook */
int16_t* cbVec) { /* (o) The constructed codebook vector */
size_t ilow;
const int16_t *ppo, *ppi;
int16_t cbVecTmp[4];
/* Interpolation starts 4 elements before cbVec+index, but must not start
outside `cbVec`; clamping interp_len to stay within `cbVec`.
*/
size_t interp_len = WEBRTC_SPL_MIN(index, 4);
rtc_MsanCheckInitialized(buffer - index - interp_len, sizeof(buffer[0]),
index + interp_len);
ilow = index - interp_len;
/* copy the first noninterpolated part */
ppo = buffer-index;
WEBRTC_SPL_MEMCPY_W16(cbVec, ppo, index);
/* interpolation */
ppo = buffer - interp_len;
ppi = buffer - index - interp_len;
/* perform cbVec[ilow+k] = ((ppi[k]*alphaTbl[k])>>15) +
((ppo[k]*alphaTbl[interp_len-1-k])>>15);
for k = 0..interp_len-1
*/
WebRtcSpl_ElementwiseVectorMult(&cbVec[ilow], ppi, WebRtcIlbcfix_kAlpha,
interp_len, 15);
WebRtcSpl_ReverseOrderMultArrayElements(
cbVecTmp, ppo, &WebRtcIlbcfix_kAlpha[interp_len - 1], interp_len, 15);
WebRtcSpl_AddVectorsAndShift(&cbVec[ilow], &cbVec[ilow], cbVecTmp, interp_len,
0);
/* copy the second noninterpolated part */
ppo = buffer - index;
/* `tempbuff2` is declared in WebRtcIlbcfix_GetCbVec and is SUBL+5 elements
long. `buffer` points one element past the end of that vector, i.e., at
tempbuff2+SUBL+5. Since ppo=buffer-index, we cannot read any more than
`index` elements from `ppo`.
`cbVec` is declared to be SUBL elements long in WebRtcIlbcfix_CbConstruct.
Therefore, we can only write SUBL-index elements to cbVec+index.
These two conditions limit the number of elements to copy.
*/
WEBRTC_SPL_MEMCPY_W16(cbVec+index, ppo, WEBRTC_SPL_MIN(SUBL-index, index));
}

38
modules/audio_coding/codecs/ilbc/create_augmented_vec.h
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_CreateAugmentedVec.h
******************************************************************/
#ifndef MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_CREATE_AUGMENTED_VEC_H_
#define MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_CREATE_AUGMENTED_VEC_H_
#include <stddef.h>
#include <stdint.h>
/*----------------------------------------------------------------*
* Recreate a specific codebook vector from the augmented part.
*
*----------------------------------------------------------------*/
void WebRtcIlbcfix_CreateAugmentedVec(
size_t index, /* (i) Index for the augmented vector to be
created */
const int16_t* buffer, /* (i) Pointer to the end of the codebook memory
that is used for creation of the augmented
codebook */
int16_t* cbVec); /* (o) The construced codebook vector */
#endif

261
modules/audio_coding/codecs/ilbc/decode.c
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@ -1,261 +0,0 @@
/*
* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_Decode.c
******************************************************************/
#include "modules/audio_coding/codecs/ilbc/decode.h"
#include "modules/audio_coding/codecs/ilbc/constants.h"
#include "modules/audio_coding/codecs/ilbc/decode_residual.h"
#include "modules/audio_coding/codecs/ilbc/decoder_interpolate_lsf.h"
#include "modules/audio_coding/codecs/ilbc/defines.h"
#include "modules/audio_coding/codecs/ilbc/do_plc.h"
#include "modules/audio_coding/codecs/ilbc/enhancer_interface.h"
#include "modules/audio_coding/codecs/ilbc/hp_output.h"
#include "modules/audio_coding/codecs/ilbc/index_conv_dec.h"
#include "modules/audio_coding/codecs/ilbc/init_decode.h"
#include "modules/audio_coding/codecs/ilbc/lsf_check.h"
#include "modules/audio_coding/codecs/ilbc/simple_lsf_dequant.h"
#include "modules/audio_coding/codecs/ilbc/unpack_bits.h"
#include "modules/audio_coding/codecs/ilbc/xcorr_coef.h"
#include "rtc_base/system/arch.h"
#ifndef WEBRTC_ARCH_BIG_ENDIAN
#include "modules/audio_coding/codecs/ilbc/swap_bytes.h"
#endif
/*----------------------------------------------------------------*
* main decoder function
*---------------------------------------------------------------*/
int WebRtcIlbcfix_DecodeImpl(
int16_t *decblock, /* (o) decoded signal block */
const uint16_t *bytes, /* (i) encoded signal bits */
IlbcDecoder *iLBCdec_inst, /* (i/o) the decoder state
structure */
int16_t mode /* (i) 0: bad packet, PLC,
1: normal */
) {
const int old_mode = iLBCdec_inst->mode;
const int old_use_enhancer = iLBCdec_inst->use_enhancer;
size_t i;
int16_t order_plus_one;
int16_t last_bit;
int16_t *data;
/* Stack based */
int16_t decresidual[BLOCKL_MAX];
int16_t PLCresidual[BLOCKL_MAX + LPC_FILTERORDER];
int16_t syntdenum[NSUB_MAX*(LPC_FILTERORDER+1)];
int16_t PLClpc[LPC_FILTERORDER + 1];
#ifndef WEBRTC_ARCH_BIG_ENDIAN
uint16_t swapped[NO_OF_WORDS_30MS];
#endif
iLBC_bits *iLBCbits_inst = (iLBC_bits*)PLCresidual;
/* Reuse some buffers that are non overlapping in order to save stack memory */
data = &PLCresidual[LPC_FILTERORDER];
if (mode) { /* the data are good */
/* decode data */
/* Unpacketize bits into parameters */
#ifndef WEBRTC_ARCH_BIG_ENDIAN
WebRtcIlbcfix_SwapBytes(bytes, iLBCdec_inst->no_of_words, swapped);
last_bit = WebRtcIlbcfix_UnpackBits(swapped, iLBCbits_inst, iLBCdec_inst->mode);
#else
last_bit = WebRtcIlbcfix_UnpackBits(bytes, iLBCbits_inst, iLBCdec_inst->mode);
#endif
/* Check for bit errors */
if (iLBCbits_inst->startIdx<1)
mode = 0;
if ((iLBCdec_inst->mode==20) && (iLBCbits_inst->startIdx>3))
mode = 0;
if ((iLBCdec_inst->mode==30) && (iLBCbits_inst->startIdx>5))
mode = 0;
if (last_bit==1)
mode = 0;
if (mode) { /* No bit errors was detected, continue decoding */
/* Stack based */
int16_t lsfdeq[LPC_FILTERORDER*LPC_N_MAX];
int16_t weightdenum[(LPC_FILTERORDER + 1)*NSUB_MAX];
/* adjust index */
WebRtcIlbcfix_IndexConvDec(iLBCbits_inst->cb_index);
/* decode the lsf */
WebRtcIlbcfix_SimpleLsfDeQ(lsfdeq, (int16_t*)(iLBCbits_inst->lsf), iLBCdec_inst->lpc_n);
WebRtcIlbcfix_LsfCheck(lsfdeq, LPC_FILTERORDER, iLBCdec_inst->lpc_n);
WebRtcIlbcfix_DecoderInterpolateLsp(syntdenum, weightdenum,
lsfdeq, LPC_FILTERORDER, iLBCdec_inst);
/* Decode the residual using the cb and gain indexes */
if (!WebRtcIlbcfix_DecodeResidual(iLBCdec_inst, iLBCbits_inst,
decresidual, syntdenum))
goto error;
/* preparing the plc for a future loss! */
WebRtcIlbcfix_DoThePlc(
PLCresidual, PLClpc, 0, decresidual,
syntdenum + (LPC_FILTERORDER + 1) * (iLBCdec_inst->nsub - 1),
iLBCdec_inst->last_lag, iLBCdec_inst);
/* Use the output from doThePLC */
WEBRTC_SPL_MEMCPY_W16(decresidual, PLCresidual, iLBCdec_inst->blockl);
}
}
if (mode == 0) {
/* the data is bad (either a PLC call
* was made or a bit error was detected)
*/
/* packet loss conceal */
WebRtcIlbcfix_DoThePlc(PLCresidual, PLClpc, 1, decresidual, syntdenum,
iLBCdec_inst->last_lag, iLBCdec_inst);
WEBRTC_SPL_MEMCPY_W16(decresidual, PLCresidual, iLBCdec_inst->blockl);
order_plus_one = LPC_FILTERORDER + 1;
for (i = 0; i < iLBCdec_inst->nsub; i++) {
WEBRTC_SPL_MEMCPY_W16(syntdenum+(i*order_plus_one),
PLClpc, order_plus_one);
}
}
if ((*iLBCdec_inst).use_enhancer == 1) { /* Enhancer activated */
/* Update the filter and filter coefficients if there was a packet loss */
if (iLBCdec_inst->prev_enh_pl==2) {
for (i=0;i<iLBCdec_inst->nsub;i++) {
WEBRTC_SPL_MEMCPY_W16(&(iLBCdec_inst->old_syntdenum[i*(LPC_FILTERORDER+1)]),
syntdenum, (LPC_FILTERORDER+1));
}
}
/* post filtering */
(*iLBCdec_inst).last_lag =
WebRtcIlbcfix_EnhancerInterface(data, decresidual, iLBCdec_inst);
/* synthesis filtering */
/* Set up the filter state */
WEBRTC_SPL_MEMCPY_W16(&data[-LPC_FILTERORDER], iLBCdec_inst->syntMem, LPC_FILTERORDER);
if (iLBCdec_inst->mode==20) {
/* Enhancer has 40 samples delay */
i=0;
WebRtcSpl_FilterARFastQ12(
data, data,
iLBCdec_inst->old_syntdenum + (i+iLBCdec_inst->nsub-1)*(LPC_FILTERORDER+1),
LPC_FILTERORDER+1, SUBL);
for (i=1; i < iLBCdec_inst->nsub; i++) {
WebRtcSpl_FilterARFastQ12(
data+i*SUBL, data+i*SUBL,
syntdenum+(i-1)*(LPC_FILTERORDER+1),
LPC_FILTERORDER+1, SUBL);
}
} else if (iLBCdec_inst->mode==30) {
/* Enhancer has 80 samples delay */
for (i=0; i < 2; i++) {
WebRtcSpl_FilterARFastQ12(
data+i*SUBL, data+i*SUBL,
iLBCdec_inst->old_syntdenum + (i+4)*(LPC_FILTERORDER+1),
LPC_FILTERORDER+1, SUBL);
}
for (i=2; i < iLBCdec_inst->nsub; i++) {
WebRtcSpl_FilterARFastQ12(
data+i*SUBL, data+i*SUBL,
syntdenum+(i-2)*(LPC_FILTERORDER+1),
LPC_FILTERORDER+1, SUBL);
}
}
/* Save the filter state */
WEBRTC_SPL_MEMCPY_W16(iLBCdec_inst->syntMem, &data[iLBCdec_inst->blockl-LPC_FILTERORDER], LPC_FILTERORDER);
} else { /* Enhancer not activated */
size_t lag;
/* Find last lag (since the enhancer is not called to give this info) */
lag = 20;
if (iLBCdec_inst->mode==20) {
lag = WebRtcIlbcfix_XcorrCoef(
&decresidual[iLBCdec_inst->blockl-60],
&decresidual[iLBCdec_inst->blockl-60-lag],
60,
80, lag, -1);
} else {
lag = WebRtcIlbcfix_XcorrCoef(
&decresidual[iLBCdec_inst->blockl-ENH_BLOCKL],
&decresidual[iLBCdec_inst->blockl-ENH_BLOCKL-lag],
ENH_BLOCKL,
100, lag, -1);
}
/* Store lag (it is needed if next packet is lost) */
(*iLBCdec_inst).last_lag = lag;
/* copy data and run synthesis filter */
WEBRTC_SPL_MEMCPY_W16(data, decresidual, iLBCdec_inst->blockl);
/* Set up the filter state */
WEBRTC_SPL_MEMCPY_W16(&data[-LPC_FILTERORDER], iLBCdec_inst->syntMem, LPC_FILTERORDER);
for (i=0; i < iLBCdec_inst->nsub; i++) {
WebRtcSpl_FilterARFastQ12(
data+i*SUBL, data+i*SUBL,
syntdenum + i*(LPC_FILTERORDER+1),
LPC_FILTERORDER+1, SUBL);
}
/* Save the filter state */
WEBRTC_SPL_MEMCPY_W16(iLBCdec_inst->syntMem, &data[iLBCdec_inst->blockl-LPC_FILTERORDER], LPC_FILTERORDER);
}
WEBRTC_SPL_MEMCPY_W16(decblock,data,iLBCdec_inst->blockl);
/* High pass filter the signal (with upscaling a factor 2 and saturation) */
WebRtcIlbcfix_HpOutput(decblock, (int16_t*)WebRtcIlbcfix_kHpOutCoefs,
iLBCdec_inst->hpimemy, iLBCdec_inst->hpimemx,
iLBCdec_inst->blockl);
WEBRTC_SPL_MEMCPY_W16(iLBCdec_inst->old_syntdenum,
syntdenum, iLBCdec_inst->nsub*(LPC_FILTERORDER+1));
iLBCdec_inst->prev_enh_pl=0;
if (mode==0) { /* PLC was used */
iLBCdec_inst->prev_enh_pl=1;
}
return 0; // Success.
error:
// The decoder got sick from eating that data. Reset it and return.
WebRtcIlbcfix_InitDecode(iLBCdec_inst, old_mode, old_use_enhancer);
return -1; // Error
}

42
modules/audio_coding/codecs/ilbc/decode.h
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@ -1,42 +0,0 @@
/*
* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_Decode.h
******************************************************************/
#ifndef MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_DECODE_H_
#define MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_DECODE_H_
#include <stdint.h>
#include "absl/base/attributes.h"
#include "modules/audio_coding/codecs/ilbc/defines.h"
/*----------------------------------------------------------------*
* main decoder function
*---------------------------------------------------------------*/
// Returns 0 on success, -1 on error.
ABSL_MUST_USE_RESULT
int WebRtcIlbcfix_DecodeImpl(
int16_t* decblock, /* (o) decoded signal block */
const uint16_t* bytes, /* (i) encoded signal bits */
IlbcDecoder* iLBCdec_inst, /* (i/o) the decoder state
structure */
int16_t mode /* (i) 0: bad packet, PLC,
1: normal */
);
#endif

185
modules/audio_coding/codecs/ilbc/decode_residual.c
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_DecodeResidual.c
******************************************************************/
#include "modules/audio_coding/codecs/ilbc/decode_residual.h"
#include <string.h>
#include "modules/audio_coding/codecs/ilbc/cb_construct.h"
#include "modules/audio_coding/codecs/ilbc/constants.h"
#include "modules/audio_coding/codecs/ilbc/defines.h"
#include "modules/audio_coding/codecs/ilbc/do_plc.h"
#include "modules/audio_coding/codecs/ilbc/enhancer_interface.h"
#include "modules/audio_coding/codecs/ilbc/index_conv_dec.h"
#include "modules/audio_coding/codecs/ilbc/lsf_check.h"
#include "modules/audio_coding/codecs/ilbc/state_construct.h"
#include "modules/audio_coding/codecs/ilbc/xcorr_coef.h"
/*----------------------------------------------------------------*
* frame residual decoder function (subrutine to iLBC_decode)
*---------------------------------------------------------------*/
bool WebRtcIlbcfix_DecodeResidual(
IlbcDecoder *iLBCdec_inst,
/* (i/o) the decoder state structure */
iLBC_bits *iLBC_encbits, /* (i/o) Encoded bits, which are used
for the decoding */
int16_t *decresidual, /* (o) decoded residual frame */
int16_t *syntdenum /* (i) the decoded synthesis filter
coefficients */
) {
size_t meml_gotten, diff, start_pos;
size_t subcount, subframe;
int16_t *reverseDecresidual = iLBCdec_inst->enh_buf; /* Reversed decoded data, used for decoding backwards in time (reuse memory in state) */
int16_t *memVec = iLBCdec_inst->prevResidual; /* Memory for codebook and filter state (reuse memory in state) */
int16_t *mem = &memVec[CB_HALFFILTERLEN]; /* Memory for codebook */
diff = STATE_LEN - iLBCdec_inst->state_short_len;
if (iLBC_encbits->state_first == 1) {
start_pos = (iLBC_encbits->startIdx-1)*SUBL;
} else {
start_pos = (iLBC_encbits->startIdx-1)*SUBL + diff;
}
/* decode scalar part of start state */
WebRtcIlbcfix_StateConstruct(iLBC_encbits->idxForMax,
iLBC_encbits->idxVec, &syntdenum[(iLBC_encbits->startIdx-1)*(LPC_FILTERORDER+1)],
&decresidual[start_pos], iLBCdec_inst->state_short_len
);
if (iLBC_encbits->state_first) { /* put adaptive part in the end */
/* setup memory */
WebRtcSpl_MemSetW16(mem, 0, CB_MEML - iLBCdec_inst->state_short_len);
WEBRTC_SPL_MEMCPY_W16(mem+CB_MEML-iLBCdec_inst->state_short_len, decresidual+start_pos,
iLBCdec_inst->state_short_len);
/* construct decoded vector */
if (!WebRtcIlbcfix_CbConstruct(
&decresidual[start_pos + iLBCdec_inst->state_short_len],
iLBC_encbits->cb_index, iLBC_encbits->gain_index,
mem + CB_MEML - ST_MEM_L_TBL, ST_MEM_L_TBL, diff))
return false; // Error.
}
else {/* put adaptive part in the beginning */
/* setup memory */
meml_gotten = iLBCdec_inst->state_short_len;
WebRtcSpl_MemCpyReversedOrder(mem+CB_MEML-1,
decresidual+start_pos, meml_gotten);
WebRtcSpl_MemSetW16(mem, 0, CB_MEML - meml_gotten);
/* construct decoded vector */
if (!WebRtcIlbcfix_CbConstruct(reverseDecresidual, iLBC_encbits->cb_index,
iLBC_encbits->gain_index,
mem + CB_MEML - ST_MEM_L_TBL, ST_MEM_L_TBL,
diff))
return false; // Error.
/* get decoded residual from reversed vector */
WebRtcSpl_MemCpyReversedOrder(&decresidual[start_pos-1],
reverseDecresidual, diff);
}
/* counter for predicted subframes */
subcount=1;
/* forward prediction of subframes */
if (iLBCdec_inst->nsub > iLBC_encbits->startIdx + 1) {
/* setup memory */
WebRtcSpl_MemSetW16(mem, 0, CB_MEML-STATE_LEN);
WEBRTC_SPL_MEMCPY_W16(mem+CB_MEML-STATE_LEN,
decresidual+(iLBC_encbits->startIdx-1)*SUBL, STATE_LEN);
/* loop over subframes to encode */
size_t Nfor = iLBCdec_inst->nsub - iLBC_encbits->startIdx - 1;
for (subframe=0; subframe<Nfor; subframe++) {
/* construct decoded vector */
if (!WebRtcIlbcfix_CbConstruct(
&decresidual[(iLBC_encbits->startIdx + 1 + subframe) * SUBL],
iLBC_encbits->cb_index + subcount * CB_NSTAGES,
iLBC_encbits->gain_index + subcount * CB_NSTAGES, mem, MEM_LF_TBL,
SUBL))
return false; // Error;
/* update memory */
memmove(mem, mem + SUBL, (CB_MEML - SUBL) * sizeof(*mem));
WEBRTC_SPL_MEMCPY_W16(mem+CB_MEML-SUBL,
&decresidual[(iLBC_encbits->startIdx+1+subframe)*SUBL], SUBL);
subcount++;
}
}
/* backward prediction of subframes */
if (iLBC_encbits->startIdx > 1) {
/* setup memory */
meml_gotten = SUBL*(iLBCdec_inst->nsub+1-iLBC_encbits->startIdx);
if( meml_gotten > CB_MEML ) {
meml_gotten=CB_MEML;
}
WebRtcSpl_MemCpyReversedOrder(mem+CB_MEML-1,
decresidual+(iLBC_encbits->startIdx-1)*SUBL, meml_gotten);
WebRtcSpl_MemSetW16(mem, 0, CB_MEML - meml_gotten);
/* loop over subframes to decode */
size_t Nback = iLBC_encbits->startIdx - 1;
for (subframe=0; subframe<Nback; subframe++) {
/* construct decoded vector */
if (!WebRtcIlbcfix_CbConstruct(
&reverseDecresidual[subframe * SUBL],
iLBC_encbits->cb_index + subcount * CB_NSTAGES,
iLBC_encbits->gain_index + subcount * CB_NSTAGES, mem, MEM_LF_TBL,
SUBL))
return false; // Error.
/* update memory */
memmove(mem, mem + SUBL, (CB_MEML - SUBL) * sizeof(*mem));
WEBRTC_SPL_MEMCPY_W16(mem+CB_MEML-SUBL,
&reverseDecresidual[subframe*SUBL], SUBL);
subcount++;
}
/* get decoded residual from reversed vector */
WebRtcSpl_MemCpyReversedOrder(decresidual+SUBL*Nback-1,
reverseDecresidual, SUBL*Nback);
}
return true; // Success.
}

45
modules/audio_coding/codecs/ilbc/decode_residual.h
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_DecodeResidual.h
******************************************************************/
#ifndef MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_DECODE_RESIDUAL_H_
#define MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_DECODE_RESIDUAL_H_
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include "absl/base/attributes.h"
#include "modules/audio_coding/codecs/ilbc/defines.h"
/*----------------------------------------------------------------*
* frame residual decoder function (subrutine to iLBC_decode)
*---------------------------------------------------------------*/
// Returns true on success, false on failure. In case of failure, the decoder
// state may be corrupted and needs resetting.
ABSL_MUST_USE_RESULT
bool WebRtcIlbcfix_DecodeResidual(
IlbcDecoder* iLBCdec_inst, /* (i/o) the decoder state structure */
iLBC_bits* iLBC_encbits, /* (i/o) Encoded bits, which are used
for the decoding */
int16_t* decresidual, /* (o) decoded residual frame */
int16_t* syntdenum /* (i) the decoded synthesis filter
coefficients */
);
#endif

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modules/audio_coding/codecs/ilbc/decoder_interpolate_lsf.c
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_DecoderInterpolateLsp.c
******************************************************************/
#include "modules/audio_coding/codecs/ilbc/decoder_interpolate_lsf.h"
#include "modules/audio_coding/codecs/ilbc/bw_expand.h"
#include "modules/audio_coding/codecs/ilbc/constants.h"
#include "modules/audio_coding/codecs/ilbc/defines.h"
#include "modules/audio_coding/codecs/ilbc/lsf_interpolate_to_poly_dec.h"
/*----------------------------------------------------------------*
* obtain synthesis and weighting filters form lsf coefficients
*---------------------------------------------------------------*/
void WebRtcIlbcfix_DecoderInterpolateLsp(
int16_t *syntdenum, /* (o) synthesis filter coefficients */
int16_t *weightdenum, /* (o) weighting denumerator
coefficients */
int16_t *lsfdeq, /* (i) dequantized lsf coefficients */
int16_t length, /* (i) length of lsf coefficient vector */
IlbcDecoder *iLBCdec_inst
/* (i) the decoder state structure */
){
size_t i;
int pos, lp_length;
int16_t lp[LPC_FILTERORDER + 1], *lsfdeq2;
lsfdeq2 = lsfdeq + length;
lp_length = length + 1;
if (iLBCdec_inst->mode==30) {
/* subframe 1: Interpolation between old and first LSF */
WebRtcIlbcfix_LspInterpolate2PolyDec(lp, (*iLBCdec_inst).lsfdeqold, lsfdeq,
WebRtcIlbcfix_kLsfWeight30ms[0], length);
WEBRTC_SPL_MEMCPY_W16(syntdenum,lp,lp_length);
WebRtcIlbcfix_BwExpand(weightdenum, lp, (int16_t*)WebRtcIlbcfix_kLpcChirpSyntDenum, (int16_t)lp_length);
/* subframes 2 to 6: interpolation between first and last LSF */
pos = lp_length;
for (i = 1; i < 6; i++) {
WebRtcIlbcfix_LspInterpolate2PolyDec(lp, lsfdeq, lsfdeq2,
WebRtcIlbcfix_kLsfWeight30ms[i], length);
WEBRTC_SPL_MEMCPY_W16(syntdenum + pos,lp,lp_length);
WebRtcIlbcfix_BwExpand(weightdenum + pos, lp,
(int16_t*)WebRtcIlbcfix_kLpcChirpSyntDenum, (int16_t)lp_length);
pos += lp_length;
}
} else { /* iLBCdec_inst->mode=20 */
/* subframes 1 to 4: interpolation between old and new LSF */
pos = 0;
for (i = 0; i < iLBCdec_inst->nsub; i++) {
WebRtcIlbcfix_LspInterpolate2PolyDec(lp, iLBCdec_inst->lsfdeqold, lsfdeq,
WebRtcIlbcfix_kLsfWeight20ms[i], length);
WEBRTC_SPL_MEMCPY_W16(syntdenum+pos,lp,lp_length);
WebRtcIlbcfix_BwExpand(weightdenum+pos, lp,
(int16_t*)WebRtcIlbcfix_kLpcChirpSyntDenum, (int16_t)lp_length);
pos += lp_length;
}
}
/* update memory */
if (iLBCdec_inst->mode==30) {
WEBRTC_SPL_MEMCPY_W16(iLBCdec_inst->lsfdeqold, lsfdeq2, length);
} else {
WEBRTC_SPL_MEMCPY_W16(iLBCdec_inst->lsfdeqold, lsfdeq, length);
}
}

41
modules/audio_coding/codecs/ilbc/decoder_interpolate_lsf.h
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@ -1,41 +0,0 @@
/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_DecoderInterpolateLsp.h
******************************************************************/
#ifndef MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_DECODER_INTERPOLATE_LSF_H_
#define MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_DECODER_INTERPOLATE_LSF_H_
#include <stddef.h>
#include <stdint.h>
#include "modules/audio_coding/codecs/ilbc/defines.h"
/*----------------------------------------------------------------*
* obtain synthesis and weighting filters form lsf coefficients
*---------------------------------------------------------------*/
void WebRtcIlbcfix_DecoderInterpolateLsp(
int16_t* syntdenum, /* (o) synthesis filter coefficients */
int16_t* weightdenum, /* (o) weighting denumerator
coefficients */
int16_t* lsfdeq, /* (i) dequantized lsf coefficients */
int16_t length, /* (i) length of lsf coefficient vector */
IlbcDecoder* iLBCdec_inst
/* (i) the decoder state structure */
);
#endif

225
modules/audio_coding/codecs/ilbc/defines.h
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@ -1,225 +0,0 @@
/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
define.h
******************************************************************/
#ifndef MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_DEFINES_H_
#define MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_DEFINES_H_
#include <stdint.h>
#include <string.h>
#include "common_audio/signal_processing/include/signal_processing_library.h"
/* general codec settings */
#define FS 8000
#define BLOCKL_20MS 160
#define BLOCKL_30MS 240
#define BLOCKL_MAX 240
#define NSUB_20MS 4
#define NSUB_30MS 6
#define NSUB_MAX 6
#define NASUB_20MS 2
#define NASUB_30MS 4
#define NASUB_MAX 4
#define SUBL 40
#define STATE_LEN 80
#define STATE_SHORT_LEN_30MS 58
#define STATE_SHORT_LEN_20MS 57
/* LPC settings */
#define LPC_FILTERORDER 10
#define LPC_LOOKBACK 60
#define LPC_N_20MS 1
#define LPC_N_30MS 2
#define LPC_N_MAX 2
#define LPC_ASYMDIFF 20
#define LSF_NSPLIT 3
#define LSF_NUMBER_OF_STEPS 4
#define LPC_HALFORDER 5
#define COS_GRID_POINTS 60
/* cb settings */
#define CB_NSTAGES 3
#define CB_EXPAND 2
#define CB_MEML 147
#define CB_FILTERLEN (2 * 4)
#define CB_HALFFILTERLEN 4
#define CB_RESRANGE 34
#define CB_MAXGAIN_FIXQ6 83 /* error = -0.24% */
#define CB_MAXGAIN_FIXQ14 21299
/* enhancer */
#define ENH_BLOCKL 80 /* block length */
#define ENH_BLOCKL_HALF (ENH_BLOCKL / 2)
#define ENH_HL \
3 /* 2*ENH_HL+1 is number blocks \
in said second \
sequence */
#define ENH_SLOP \
2 /* max difference estimated and \
correct pitch period */
#define ENH_PLOCSL \
8 /* pitch-estimates and \
pitch-locations buffer \
length */
#define ENH_OVERHANG 2
#define ENH_UPS0 4 /* upsampling rate */
#define ENH_FL0 3 /* 2*FLO+1 is the length of each filter */
#define ENH_FLO_MULT2_PLUS1 7
#define ENH_VECTL (ENH_BLOCKL + 2 * ENH_FL0)
#define ENH_CORRDIM (2 * ENH_SLOP + 1)
#define ENH_NBLOCKS (BLOCKL / ENH_BLOCKL)
#define ENH_NBLOCKS_EXTRA 5
#define ENH_NBLOCKS_TOT 8 /* ENH_NBLOCKS+ENH_NBLOCKS_EXTRA */
#define ENH_BUFL (ENH_NBLOCKS_TOT) * ENH_BLOCKL
#define ENH_BUFL_FILTEROVERHEAD 3
#define ENH_A0 819 /* Q14 */
#define ENH_A0_MINUS_A0A0DIV4 848256041 /* Q34 */
#define ENH_A0DIV2 26843546 /* Q30 */
/* PLC */
/* Down sampling */
#define FILTERORDER_DS_PLUS1 7
#define DELAY_DS 3
#define FACTOR_DS 2
/* bit stream defs */
#define NO_OF_BYTES_20MS 38
#define NO_OF_BYTES_30MS 50
#define NO_OF_WORDS_20MS 19
#define NO_OF_WORDS_30MS 25
#define STATE_BITS 3
#define BYTE_LEN 8
#define ULP_CLASSES 3
/* help parameters */
#define TWO_PI_FIX 25736 /* Q12 */
/* Constants for codebook search and creation */
#define ST_MEM_L_TBL 85
#define MEM_LF_TBL 147
/* Struct for the bits */
typedef struct iLBC_bits_t_ {
int16_t lsf[LSF_NSPLIT * LPC_N_MAX];
int16_t cb_index[CB_NSTAGES * (NASUB_MAX + 1)]; /* First CB_NSTAGES values
contains extra CB index */
int16_t gain_index[CB_NSTAGES * (NASUB_MAX + 1)]; /* First CB_NSTAGES values
contains extra CB gain */
size_t idxForMax;
int16_t state_first;
int16_t idxVec[STATE_SHORT_LEN_30MS];
int16_t firstbits;
size_t startIdx;
} iLBC_bits;
/* type definition encoder instance */
typedef struct IlbcEncoder_ {
/* flag for frame size mode */
int16_t mode;
/* basic parameters for different frame sizes */
size_t blockl;
size_t nsub;
int16_t nasub;
size_t no_of_bytes, no_of_words;
int16_t lpc_n;
size_t state_short_len;
/* analysis filter state */
int16_t anaMem[LPC_FILTERORDER];
/* Fix-point old lsf parameters for interpolation */
int16_t lsfold[LPC_FILTERORDER];
int16_t lsfdeqold[LPC_FILTERORDER];
/* signal buffer for LP analysis */
int16_t lpc_buffer[LPC_LOOKBACK + BLOCKL_MAX];
/* state of input HP filter */
int16_t hpimemx[2];
int16_t hpimemy[4];
#ifdef SPLIT_10MS
int16_t weightdenumbuf[66];
int16_t past_samples[160];
uint16_t bytes[25];
int16_t section;
int16_t Nfor_flag;
int16_t Nback_flag;
int16_t start_pos;
size_t diff;
#endif
} IlbcEncoder;
/* type definition decoder instance */
typedef struct IlbcDecoder_ {
/* flag for frame size mode */
int16_t mode;
/* basic parameters for different frame sizes */
size_t blockl;
size_t nsub;
int16_t nasub;
size_t no_of_bytes, no_of_words;
int16_t lpc_n;
size_t state_short_len;
/* synthesis filter state */
int16_t syntMem[LPC_FILTERORDER];
/* old LSF for interpolation */
int16_t lsfdeqold[LPC_FILTERORDER];
/* pitch lag estimated in enhancer and used in PLC */
size_t last_lag;
/* PLC state information */
int consPLICount, prev_enh_pl;
int16_t perSquare;
int16_t prevScale, prevPLI;
size_t prevLag;
int16_t prevLpc[LPC_FILTERORDER + 1];
int16_t prevResidual[NSUB_MAX * SUBL];
int16_t seed;
/* previous synthesis filter parameters */
int16_t old_syntdenum[(LPC_FILTERORDER + 1) * NSUB_MAX];
/* state of output HP filter */
int16_t hpimemx[2];
int16_t hpimemy[4];
/* enhancer state information */
int use_enhancer;
int16_t enh_buf[ENH_BUFL + ENH_BUFL_FILTEROVERHEAD];
size_t enh_period[ENH_NBLOCKS_TOT];
} IlbcDecoder;
#endif

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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_DoThePlc.c
******************************************************************/
#include "modules/audio_coding/codecs/ilbc/do_plc.h"
#include "modules/audio_coding/codecs/ilbc/bw_expand.h"
#include "modules/audio_coding/codecs/ilbc/comp_corr.h"
#include "modules/audio_coding/codecs/ilbc/constants.h"
#include "modules/audio_coding/codecs/ilbc/defines.h"
/*----------------------------------------------------------------*
* Packet loss concealment routine. Conceals a residual signal
* and LP parameters. If no packet loss, update state.
*---------------------------------------------------------------*/
void WebRtcIlbcfix_DoThePlc(
int16_t *PLCresidual, /* (o) concealed residual */
int16_t *PLClpc, /* (o) concealed LP parameters */
int16_t PLI, /* (i) packet loss indicator
0 - no PL, 1 = PL */
int16_t *decresidual, /* (i) decoded residual */
int16_t *lpc, /* (i) decoded LPC (only used for no PL) */
size_t inlag, /* (i) pitch lag */
IlbcDecoder *iLBCdec_inst
/* (i/o) decoder instance */
){
size_t i;
int32_t cross, ener, cross_comp, ener_comp = 0;
int32_t measure, maxMeasure, energy;
int32_t noise_energy_threshold_30dB;
int16_t max, crossSquareMax, crossSquare;
size_t j, lag, randlag;
int16_t tmp1, tmp2;
int16_t shift1, shift2, shift3, shiftMax;
int16_t scale3;
size_t corrLen;
int32_t tmpW32, tmp2W32;
int16_t use_gain;
int16_t tot_gain;
int16_t max_perSquare;
int16_t scale1, scale2;
int16_t totscale;
int32_t nom;
int16_t denom;
int16_t pitchfact;
size_t use_lag;
int ind;
int16_t randvec[BLOCKL_MAX];
/* Packet Loss */
if (PLI == 1) {
(*iLBCdec_inst).consPLICount += 1;
/* if previous frame not lost,
determine pitch pred. gain */
if (iLBCdec_inst->prevPLI != 1) {
/* Maximum 60 samples are correlated, preserve as high accuracy
as possible without getting overflow */
max = WebRtcSpl_MaxAbsValueW16((*iLBCdec_inst).prevResidual,
iLBCdec_inst->blockl);
scale3 = (WebRtcSpl_GetSizeInBits(max)<<1) - 25;
if (scale3 < 0) {
scale3 = 0;
}
/* Store scale for use when interpolating between the
* concealment and the received packet */
iLBCdec_inst->prevScale = scale3;
/* Search around the previous lag +/-3 to find the
best pitch period */
lag = inlag - 3;
/* Guard against getting outside the frame */
corrLen = (size_t)WEBRTC_SPL_MIN(60, iLBCdec_inst->blockl-(inlag+3));
WebRtcIlbcfix_CompCorr( &cross, &ener,
iLBCdec_inst->prevResidual, lag, iLBCdec_inst->blockl, corrLen, scale3);
/* Normalize and store cross^2 and the number of shifts */
shiftMax = WebRtcSpl_GetSizeInBits(WEBRTC_SPL_ABS_W32(cross))-15;
crossSquareMax = (int16_t)((
(int16_t)WEBRTC_SPL_SHIFT_W32(cross, -shiftMax) *
(int16_t)WEBRTC_SPL_SHIFT_W32(cross, -shiftMax)) >> 15);
for (j=inlag-2;j<=inlag+3;j++) {
WebRtcIlbcfix_CompCorr( &cross_comp, &ener_comp,
iLBCdec_inst->prevResidual, j, iLBCdec_inst->blockl, corrLen, scale3);
/* Use the criteria (corr*corr)/energy to compare if
this lag is better or not. To avoid the division,
do a cross multiplication */
shift1 = WebRtcSpl_GetSizeInBits(WEBRTC_SPL_ABS_W32(cross_comp))-15;
crossSquare = (int16_t)((
(int16_t)WEBRTC_SPL_SHIFT_W32(cross_comp, -shift1) *
(int16_t)WEBRTC_SPL_SHIFT_W32(cross_comp, -shift1)) >> 15);
shift2 = WebRtcSpl_GetSizeInBits(ener)-15;
measure = (int16_t)WEBRTC_SPL_SHIFT_W32(ener, -shift2) * crossSquare;
shift3 = WebRtcSpl_GetSizeInBits(ener_comp)-15;
maxMeasure = (int16_t)WEBRTC_SPL_SHIFT_W32(ener_comp, -shift3) *
crossSquareMax;
/* Calculate shift value, so that the two measures can
be put in the same Q domain */
if(2 * shiftMax + shift3 > 2 * shift1 + shift2) {
tmp1 =
WEBRTC_SPL_MIN(31, 2 * shiftMax + shift3 - 2 * shift1 - shift2);
tmp2 = 0;
} else {
tmp1 = 0;
tmp2 =
WEBRTC_SPL_MIN(31, 2 * shift1 + shift2 - 2 * shiftMax - shift3);
}
if ((measure>>tmp1) > (maxMeasure>>tmp2)) {
/* New lag is better => record lag, measure and domain */
lag = j;
crossSquareMax = crossSquare;
cross = cross_comp;
shiftMax = shift1;
ener = ener_comp;
}
}
/* Calculate the periodicity for the lag with the maximum correlation.
Definition of the periodicity:
abs(corr(vec1, vec2))/(sqrt(energy(vec1))*sqrt(energy(vec2)))
Work in the Square domain to simplify the calculations
max_perSquare is less than 1 (in Q15)
*/
tmp2W32=WebRtcSpl_DotProductWithScale(&iLBCdec_inst->prevResidual[iLBCdec_inst->blockl-corrLen],
&iLBCdec_inst->prevResidual[iLBCdec_inst->blockl-corrLen],
corrLen, scale3);
if ((tmp2W32>0)&&(ener_comp>0)) {
/* norm energies to int16_t, compute the product of the energies and
use the upper int16_t as the denominator */
scale1=(int16_t)WebRtcSpl_NormW32(tmp2W32)-16;
tmp1=(int16_t)WEBRTC_SPL_SHIFT_W32(tmp2W32, scale1);
scale2=(int16_t)WebRtcSpl_NormW32(ener)-16;
tmp2=(int16_t)WEBRTC_SPL_SHIFT_W32(ener, scale2);
denom = (int16_t)((tmp1 * tmp2) >> 16); /* in Q(scale1+scale2-16) */
/* Square the cross correlation and norm it such that max_perSquare
will be in Q15 after the division */
totscale = scale1+scale2-1;
tmp1 = (int16_t)WEBRTC_SPL_SHIFT_W32(cross, (totscale>>1));
tmp2 = (int16_t)WEBRTC_SPL_SHIFT_W32(cross, totscale-(totscale>>1));
nom = tmp1 * tmp2;
max_perSquare = (int16_t)WebRtcSpl_DivW32W16(nom, denom);
} else {
max_perSquare = 0;
}
}
/* previous frame lost, use recorded lag and gain */
else {
lag = iLBCdec_inst->prevLag;
max_perSquare = iLBCdec_inst->perSquare;
}
/* Attenuate signal and scale down pitch pred gain if
several frames lost consecutively */
use_gain = 32767; /* 1.0 in Q15 */
if (iLBCdec_inst->consPLICount*iLBCdec_inst->blockl>320) {
use_gain = 29491; /* 0.9 in Q15 */
} else if (iLBCdec_inst->consPLICount*iLBCdec_inst->blockl>640) {
use_gain = 22938; /* 0.7 in Q15 */
} else if (iLBCdec_inst->consPLICount*iLBCdec_inst->blockl>960) {
use_gain = 16384; /* 0.5 in Q15 */
} else if (iLBCdec_inst->consPLICount*iLBCdec_inst->blockl>1280) {
use_gain = 0; /* 0.0 in Q15 */
}
/* Compute mixing factor of picth repeatition and noise:
for max_per>0.7 set periodicity to 1.0
0.4<max_per<0.7 set periodicity to (maxper-0.4)/0.7-0.4)
max_per<0.4 set periodicity to 0.0
*/
if (max_perSquare>7868) { /* periodicity > 0.7 (0.7^4=0.2401 in Q15) */
pitchfact = 32767;
} else if (max_perSquare>839) { /* 0.4 < periodicity < 0.7 (0.4^4=0.0256 in Q15) */
/* find best index and interpolate from that */
ind = 5;
while ((max_perSquare<WebRtcIlbcfix_kPlcPerSqr[ind])&&(ind>0)) {
ind--;
}
/* pitch fact is approximated by first order */
tmpW32 = (int32_t)WebRtcIlbcfix_kPlcPitchFact[ind] +
((WebRtcIlbcfix_kPlcPfSlope[ind] *
(max_perSquare - WebRtcIlbcfix_kPlcPerSqr[ind])) >> 11);
pitchfact = (int16_t)WEBRTC_SPL_MIN(tmpW32, 32767); /* guard against overflow */
} else { /* periodicity < 0.4 */
pitchfact = 0;
}
/* avoid repetition of same pitch cycle (buzzyness) */
use_lag = lag;
if (lag<80) {
use_lag = 2*lag;
}
/* compute concealed residual */
noise_energy_threshold_30dB = (int32_t)iLBCdec_inst->blockl * 900;
energy = 0;
for (i=0; i<iLBCdec_inst->blockl; i++) {
/* noise component - 52 < randlagFIX < 117 */
iLBCdec_inst->seed = (int16_t)(iLBCdec_inst->seed * 31821 + 13849);
randlag = 53 + (iLBCdec_inst->seed & 63);
if (randlag > i) {
randvec[i] =
iLBCdec_inst->prevResidual[iLBCdec_inst->blockl + i - randlag];
} else {
randvec[i] = iLBCdec_inst->prevResidual[i - randlag];
}
/* pitch repeatition component */
if (use_lag > i) {
PLCresidual[i] =
iLBCdec_inst->prevResidual[iLBCdec_inst->blockl + i - use_lag];
} else {
PLCresidual[i] = PLCresidual[i - use_lag];
}
/* Attinuate total gain for each 10 ms */
if (i<80) {
tot_gain=use_gain;
} else if (i<160) {
tot_gain = (int16_t)((31130 * use_gain) >> 15); /* 0.95*use_gain */
} else {
tot_gain = (int16_t)((29491 * use_gain) >> 15); /* 0.9*use_gain */
}
/* mix noise and pitch repeatition */
PLCresidual[i] = (int16_t)((tot_gain *
((pitchfact * PLCresidual[i] + (32767 - pitchfact) * randvec[i] +
16384) >> 15)) >> 15);
/* Compute energy until threshold for noise energy is reached */
if (energy < noise_energy_threshold_30dB) {
energy += PLCresidual[i] * PLCresidual[i];
}
}
/* less than 30 dB, use only noise */
if (energy < noise_energy_threshold_30dB) {
for (i=0; i<iLBCdec_inst->blockl; i++) {
PLCresidual[i] = randvec[i];
}
}
/* use the old LPC */
WEBRTC_SPL_MEMCPY_W16(PLClpc, (*iLBCdec_inst).prevLpc, LPC_FILTERORDER+1);
/* Update state in case there are multiple frame losses */
iLBCdec_inst->prevLag = lag;
iLBCdec_inst->perSquare = max_perSquare;
}
/* no packet loss, copy input */
else {
WEBRTC_SPL_MEMCPY_W16(PLCresidual, decresidual, iLBCdec_inst->blockl);
WEBRTC_SPL_MEMCPY_W16(PLClpc, lpc, (LPC_FILTERORDER+1));
iLBCdec_inst->consPLICount = 0;
}
/* update state */
iLBCdec_inst->prevPLI = PLI;
WEBRTC_SPL_MEMCPY_W16(iLBCdec_inst->prevLpc, PLClpc, (LPC_FILTERORDER+1));
WEBRTC_SPL_MEMCPY_W16(iLBCdec_inst->prevResidual, PLCresidual, iLBCdec_inst->blockl);
return;
}

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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_DoThePlc.h
******************************************************************/
#ifndef MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_DO_PLC_H_
#define MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_DO_PLC_H_
#include <stddef.h>
#include <stdint.h>
#include "modules/audio_coding/codecs/ilbc/defines.h"
/*----------------------------------------------------------------*
* Packet loss concealment routine. Conceals a residual signal
* and LP parameters. If no packet loss, update state.
*---------------------------------------------------------------*/
void WebRtcIlbcfix_DoThePlc(
int16_t* PLCresidual, /* (o) concealed residual */
int16_t* PLClpc, /* (o) concealed LP parameters */
int16_t PLI, /* (i) packet loss indicator
0 - no PL, 1 = PL */
int16_t* decresidual, /* (i) decoded residual */
int16_t* lpc, /* (i) decoded LPC (only used for no PL) */
size_t inlag, /* (i) pitch lag */
IlbcDecoder* iLBCdec_inst
/* (i/o) decoder instance */
);
#endif

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/*
* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_Encode.c
******************************************************************/
#include "modules/audio_coding/codecs/ilbc/encode.h"
#include <string.h>
#include "modules/audio_coding/codecs/ilbc/cb_construct.h"
#include "modules/audio_coding/codecs/ilbc/cb_search.h"
#include "modules/audio_coding/codecs/ilbc/constants.h"
#include "modules/audio_coding/codecs/ilbc/defines.h"
#include "modules/audio_coding/codecs/ilbc/frame_classify.h"
#include "modules/audio_coding/codecs/ilbc/hp_input.h"
#include "modules/audio_coding/codecs/ilbc/index_conv_enc.h"
#include "modules/audio_coding/codecs/ilbc/lpc_encode.h"
#include "modules/audio_coding/codecs/ilbc/pack_bits.h"
#include "modules/audio_coding/codecs/ilbc/state_construct.h"
#include "modules/audio_coding/codecs/ilbc/state_search.h"
#include "rtc_base/checks.h"
#include "rtc_base/system/arch.h"
#ifdef SPLIT_10MS
#include "modules/audio_coding/codecs/ilbc/unpack_bits.h"
#include "modules/audio_coding/codecs/ilbc/index_conv_dec.h"
#endif
#ifndef WEBRTC_ARCH_BIG_ENDIAN
#include "modules/audio_coding/codecs/ilbc/swap_bytes.h"
#endif
/*----------------------------------------------------------------*
* main encoder function
*---------------------------------------------------------------*/
void WebRtcIlbcfix_EncodeImpl(
uint16_t *bytes, /* (o) encoded data bits iLBC */
const int16_t *block, /* (i) speech vector to encode */
IlbcEncoder *iLBCenc_inst /* (i/o) the general encoder
state */
){
size_t n, meml_gotten, Nfor;
size_t diff, start_pos;
size_t index;
size_t subcount, subframe;
size_t start_count, end_count;
int16_t *residual;
int32_t en1, en2;
int16_t scale, max;
int16_t *syntdenum;
int16_t *decresidual;
int16_t *reverseResidual;
int16_t *reverseDecresidual;
/* Stack based */
int16_t weightdenum[(LPC_FILTERORDER + 1)*NSUB_MAX];
int16_t dataVec[BLOCKL_MAX + LPC_FILTERORDER];
int16_t memVec[CB_MEML+CB_FILTERLEN];
int16_t bitsMemory[sizeof(iLBC_bits)/sizeof(int16_t)];
iLBC_bits *iLBCbits_inst = (iLBC_bits*)bitsMemory;
#ifdef SPLIT_10MS
int16_t *weightdenumbuf = iLBCenc_inst->weightdenumbuf;
int16_t last_bit;
#endif
int16_t *data = &dataVec[LPC_FILTERORDER];
int16_t *mem = &memVec[CB_HALFFILTERLEN];
/* Reuse som buffers to save stack memory */
residual = &iLBCenc_inst->lpc_buffer[LPC_LOOKBACK+BLOCKL_MAX-iLBCenc_inst->blockl];
syntdenum = mem; /* syntdenum[(LPC_FILTERORDER + 1)*NSUB_MAX] and mem are used non overlapping in the code */
decresidual = residual; /* Already encoded residual is overwritten by the decoded version */
reverseResidual = data; /* data and reverseResidual are used non overlapping in the code */
reverseDecresidual = reverseResidual; /* Already encoded residual is overwritten by the decoded version */
#ifdef SPLIT_10MS
WebRtcSpl_MemSetW16 ( (int16_t *) iLBCbits_inst, 0,
sizeof(iLBC_bits) / sizeof(int16_t) );
start_pos = iLBCenc_inst->start_pos;
diff = iLBCenc_inst->diff;
if (iLBCenc_inst->section != 0){
WEBRTC_SPL_MEMCPY_W16 (weightdenum, weightdenumbuf,
SCRATCH_ENCODE_DATAVEC - SCRATCH_ENCODE_WEIGHTDENUM);
/* Un-Packetize the frame into parameters */
last_bit = WebRtcIlbcfix_UnpackBits (iLBCenc_inst->bytes, iLBCbits_inst, iLBCenc_inst->mode);
if (last_bit)
return;
/* adjust index */
WebRtcIlbcfix_IndexConvDec (iLBCbits_inst->cb_index);
if (iLBCenc_inst->section == 1){
/* Save first 80 samples of a 160/240 sample frame for 20/30msec */
WEBRTC_SPL_MEMCPY_W16 (iLBCenc_inst->past_samples, block, 80);
}
else{ // iLBCenc_inst->section == 2 AND mode = 30ms
/* Save second 80 samples of a 240 sample frame for 30msec */
WEBRTC_SPL_MEMCPY_W16 (iLBCenc_inst->past_samples + 80, block, 80);
}
}
else{ // iLBCenc_inst->section == 0
/* form a complete frame of 160/240 for 20msec/30msec mode */
WEBRTC_SPL_MEMCPY_W16 (data + (iLBCenc_inst->mode * 8) - 80, block, 80);
WEBRTC_SPL_MEMCPY_W16 (data, iLBCenc_inst->past_samples,
(iLBCenc_inst->mode * 8) - 80);
iLBCenc_inst->Nfor_flag = 0;
iLBCenc_inst->Nback_flag = 0;
#else
/* copy input block to data*/
WEBRTC_SPL_MEMCPY_W16(data,block,iLBCenc_inst->blockl);
#endif
/* high pass filtering of input signal and scale down the residual (*0.5) */
WebRtcIlbcfix_HpInput(data, (int16_t*)WebRtcIlbcfix_kHpInCoefs,
iLBCenc_inst->hpimemy, iLBCenc_inst->hpimemx,
iLBCenc_inst->blockl);
/* LPC of hp filtered input data */
WebRtcIlbcfix_LpcEncode(syntdenum, weightdenum, iLBCbits_inst->lsf, data,
iLBCenc_inst);
/* Set up state */
WEBRTC_SPL_MEMCPY_W16(dataVec, iLBCenc_inst->anaMem, LPC_FILTERORDER);
/* inverse filter to get residual */
for (n=0; n<iLBCenc_inst->nsub; n++ ) {
WebRtcSpl_FilterMAFastQ12(
&data[n*SUBL], &residual[n*SUBL],
&syntdenum[n*(LPC_FILTERORDER+1)],
LPC_FILTERORDER+1, SUBL);
}
/* Copy the state for next frame */
WEBRTC_SPL_MEMCPY_W16(iLBCenc_inst->anaMem, &data[iLBCenc_inst->blockl-LPC_FILTERORDER], LPC_FILTERORDER);
/* find state location */
iLBCbits_inst->startIdx = WebRtcIlbcfix_FrameClassify(iLBCenc_inst,residual);
/* check if state should be in first or last part of the
two subframes */
index = (iLBCbits_inst->startIdx-1)*SUBL;
max=WebRtcSpl_MaxAbsValueW16(&residual[index], 2*SUBL);
scale = WebRtcSpl_GetSizeInBits((uint32_t)(max * max));
/* Scale to maximum 25 bits so that the MAC won't cause overflow */
scale = scale - 25;
if(scale < 0) {
scale = 0;
}
diff = STATE_LEN - iLBCenc_inst->state_short_len;
en1=WebRtcSpl_DotProductWithScale(&residual[index], &residual[index],
iLBCenc_inst->state_short_len, scale);
index += diff;
en2=WebRtcSpl_DotProductWithScale(&residual[index], &residual[index],
iLBCenc_inst->state_short_len, scale);
if (en1 > en2) {
iLBCbits_inst->state_first = 1;
start_pos = (iLBCbits_inst->startIdx-1)*SUBL;
} else {
iLBCbits_inst->state_first = 0;
start_pos = (iLBCbits_inst->startIdx-1)*SUBL + diff;
}
/* scalar quantization of state */
WebRtcIlbcfix_StateSearch(iLBCenc_inst, iLBCbits_inst, &residual[start_pos],
&syntdenum[(iLBCbits_inst->startIdx-1)*(LPC_FILTERORDER+1)],
&weightdenum[(iLBCbits_inst->startIdx-1)*(LPC_FILTERORDER+1)]);
WebRtcIlbcfix_StateConstruct(iLBCbits_inst->idxForMax, iLBCbits_inst->idxVec,
&syntdenum[(iLBCbits_inst->startIdx-1)*(LPC_FILTERORDER+1)],
&decresidual[start_pos], iLBCenc_inst->state_short_len
);
/* predictive quantization in state */
if (iLBCbits_inst->state_first) { /* put adaptive part in the end */
/* setup memory */
WebRtcSpl_MemSetW16(mem, 0, CB_MEML - iLBCenc_inst->state_short_len);
WEBRTC_SPL_MEMCPY_W16(mem+CB_MEML-iLBCenc_inst->state_short_len,
decresidual+start_pos, iLBCenc_inst->state_short_len);
/* encode subframes */
WebRtcIlbcfix_CbSearch(iLBCenc_inst, iLBCbits_inst->cb_index, iLBCbits_inst->gain_index,
&residual[start_pos+iLBCenc_inst->state_short_len],
mem+CB_MEML-ST_MEM_L_TBL, ST_MEM_L_TBL, diff,
&weightdenum[iLBCbits_inst->startIdx*(LPC_FILTERORDER+1)], 0);
/* construct decoded vector */
RTC_CHECK(WebRtcIlbcfix_CbConstruct(
&decresidual[start_pos + iLBCenc_inst->state_short_len],
iLBCbits_inst->cb_index, iLBCbits_inst->gain_index,
mem + CB_MEML - ST_MEM_L_TBL, ST_MEM_L_TBL, diff));
}
else { /* put adaptive part in the beginning */
/* create reversed vectors for prediction */
WebRtcSpl_MemCpyReversedOrder(&reverseResidual[diff-1],
&residual[(iLBCbits_inst->startIdx+1)*SUBL-STATE_LEN], diff);
/* setup memory */
meml_gotten = iLBCenc_inst->state_short_len;
WebRtcSpl_MemCpyReversedOrder(&mem[CB_MEML-1], &decresidual[start_pos], meml_gotten);
WebRtcSpl_MemSetW16(mem, 0, CB_MEML - iLBCenc_inst->state_short_len);
/* encode subframes */
WebRtcIlbcfix_CbSearch(iLBCenc_inst, iLBCbits_inst->cb_index, iLBCbits_inst->gain_index,
reverseResidual, mem+CB_MEML-ST_MEM_L_TBL, ST_MEM_L_TBL, diff,
&weightdenum[(iLBCbits_inst->startIdx-1)*(LPC_FILTERORDER+1)],
0);
/* construct decoded vector */
RTC_CHECK(WebRtcIlbcfix_CbConstruct(
reverseDecresidual, iLBCbits_inst->cb_index,
iLBCbits_inst->gain_index, mem + CB_MEML - ST_MEM_L_TBL,
ST_MEM_L_TBL, diff));
/* get decoded residual from reversed vector */
WebRtcSpl_MemCpyReversedOrder(&decresidual[start_pos-1], reverseDecresidual, diff);
}
#ifdef SPLIT_10MS
iLBCenc_inst->start_pos = start_pos;
iLBCenc_inst->diff = diff;
iLBCenc_inst->section++;
/* adjust index */
WebRtcIlbcfix_IndexConvEnc (iLBCbits_inst->cb_index);
/* Packetize the parameters into the frame */
WebRtcIlbcfix_PackBits (iLBCenc_inst->bytes, iLBCbits_inst, iLBCenc_inst->mode);
WEBRTC_SPL_MEMCPY_W16 (weightdenumbuf, weightdenum,
SCRATCH_ENCODE_DATAVEC - SCRATCH_ENCODE_WEIGHTDENUM);
return;
}
#endif
/* forward prediction of subframes */
Nfor = iLBCenc_inst->nsub-iLBCbits_inst->startIdx-1;
/* counter for predicted subframes */
#ifdef SPLIT_10MS
if (iLBCenc_inst->mode == 20)
{
subcount = 1;
}
if (iLBCenc_inst->mode == 30)
{
if (iLBCenc_inst->section == 1)
{
subcount = 1;
}
if (iLBCenc_inst->section == 2)
{
subcount = 3;
}
}
#else
subcount=1;
#endif
if( Nfor > 0 ){
/* setup memory */
WebRtcSpl_MemSetW16(mem, 0, CB_MEML-STATE_LEN);
WEBRTC_SPL_MEMCPY_W16(mem+CB_MEML-STATE_LEN,
decresidual+(iLBCbits_inst->startIdx-1)*SUBL, STATE_LEN);
#ifdef SPLIT_10MS
if (iLBCenc_inst->Nfor_flag > 0)
{
for (subframe = 0; subframe < WEBRTC_SPL_MIN (Nfor, 2); subframe++)
{
/* update memory */
WEBRTC_SPL_MEMCPY_W16 (mem, mem + SUBL, (CB_MEML - SUBL));
WEBRTC_SPL_MEMCPY_W16 (mem + CB_MEML - SUBL,
&decresidual[(iLBCbits_inst->startIdx + 1 +
subframe) * SUBL], SUBL);
}
}
iLBCenc_inst->Nfor_flag++;
if (iLBCenc_inst->mode == 20)
{
start_count = 0;
end_count = Nfor;
}
if (iLBCenc_inst->mode == 30)
{
if (iLBCenc_inst->section == 1)
{
start_count = 0;
end_count = WEBRTC_SPL_MIN (Nfor, (size_t)2);
}
if (iLBCenc_inst->section == 2)
{
start_count = WEBRTC_SPL_MIN (Nfor, (size_t)2);
end_count = Nfor;
}
}
#else
start_count = 0;
end_count = Nfor;
#endif
/* loop over subframes to encode */
for (subframe = start_count; subframe < end_count; subframe++){
/* encode subframe */
WebRtcIlbcfix_CbSearch(iLBCenc_inst, iLBCbits_inst->cb_index+subcount*CB_NSTAGES,
iLBCbits_inst->gain_index+subcount*CB_NSTAGES,
&residual[(iLBCbits_inst->startIdx+1+subframe)*SUBL],
mem, MEM_LF_TBL, SUBL,
&weightdenum[(iLBCbits_inst->startIdx+1+subframe)*(LPC_FILTERORDER+1)],
subcount);
/* construct decoded vector */
RTC_CHECK(WebRtcIlbcfix_CbConstruct(
&decresidual[(iLBCbits_inst->startIdx + 1 + subframe) * SUBL],
iLBCbits_inst->cb_index + subcount * CB_NSTAGES,
iLBCbits_inst->gain_index + subcount * CB_NSTAGES, mem, MEM_LF_TBL,
SUBL));
/* update memory */
memmove(mem, mem + SUBL, (CB_MEML - SUBL) * sizeof(*mem));
WEBRTC_SPL_MEMCPY_W16(mem+CB_MEML-SUBL,
&decresidual[(iLBCbits_inst->startIdx+1+subframe)*SUBL], SUBL);
subcount++;
}
}
#ifdef SPLIT_10MS
if ((iLBCenc_inst->section == 1) &&
(iLBCenc_inst->mode == 30) && (Nfor > 0) && (end_count == 2))
{
iLBCenc_inst->section++;
/* adjust index */
WebRtcIlbcfix_IndexConvEnc (iLBCbits_inst->cb_index);
/* Packetize the parameters into the frame */
WebRtcIlbcfix_PackBits (iLBCenc_inst->bytes, iLBCbits_inst, iLBCenc_inst->mode);
WEBRTC_SPL_MEMCPY_W16 (weightdenumbuf, weightdenum,
SCRATCH_ENCODE_DATAVEC - SCRATCH_ENCODE_WEIGHTDENUM);
return;
}
#endif
/* backward prediction of subframes */
if (iLBCbits_inst->startIdx > 1) {
/* create reverse order vectors
(The decresidual does not need to be copied since it is
contained in the same vector as the residual)
*/
size_t Nback = iLBCbits_inst->startIdx - 1;
WebRtcSpl_MemCpyReversedOrder(&reverseResidual[Nback*SUBL-1], residual, Nback*SUBL);
/* setup memory */
meml_gotten = SUBL*(iLBCenc_inst->nsub+1-iLBCbits_inst->startIdx);
if( meml_gotten > CB_MEML ) {
meml_gotten=CB_MEML;
}
WebRtcSpl_MemCpyReversedOrder(&mem[CB_MEML-1], &decresidual[Nback*SUBL], meml_gotten);
WebRtcSpl_MemSetW16(mem, 0, CB_MEML - meml_gotten);
#ifdef SPLIT_10MS
if (iLBCenc_inst->Nback_flag > 0)
{
for (subframe = 0; subframe < WEBRTC_SPL_MAX (2 - Nfor, 0); subframe++)
{
/* update memory */
WEBRTC_SPL_MEMCPY_W16 (mem, mem + SUBL, (CB_MEML - SUBL));
WEBRTC_SPL_MEMCPY_W16 (mem + CB_MEML - SUBL,
&reverseDecresidual[subframe * SUBL], SUBL);
}
}
iLBCenc_inst->Nback_flag++;
if (iLBCenc_inst->mode == 20)
{
start_count = 0;
end_count = Nback;
}
if (iLBCenc_inst->mode == 30)
{
if (iLBCenc_inst->section == 1)
{
start_count = 0;
end_count = (Nfor >= 2) ? 0 : (2 - NFor);
}
if (iLBCenc_inst->section == 2)
{
start_count = (Nfor >= 2) ? 0 : (2 - NFor);
end_count = Nback;
}
}
#else
start_count = 0;
end_count = Nback;
#endif
/* loop over subframes to encode */
for (subframe = start_count; subframe < end_count; subframe++){
/* encode subframe */
WebRtcIlbcfix_CbSearch(iLBCenc_inst, iLBCbits_inst->cb_index+subcount*CB_NSTAGES,
iLBCbits_inst->gain_index+subcount*CB_NSTAGES, &reverseResidual[subframe*SUBL],
mem, MEM_LF_TBL, SUBL,
&weightdenum[(iLBCbits_inst->startIdx-2-subframe)*(LPC_FILTERORDER+1)],
subcount);
/* construct decoded vector */
RTC_CHECK(WebRtcIlbcfix_CbConstruct(
&reverseDecresidual[subframe * SUBL],
iLBCbits_inst->cb_index + subcount * CB_NSTAGES,
iLBCbits_inst->gain_index + subcount * CB_NSTAGES, mem, MEM_LF_TBL,
SUBL));
/* update memory */
memmove(mem, mem + SUBL, (CB_MEML - SUBL) * sizeof(*mem));
WEBRTC_SPL_MEMCPY_W16(mem+CB_MEML-SUBL,
&reverseDecresidual[subframe*SUBL], SUBL);
subcount++;
}
/* get decoded residual from reversed vector */
WebRtcSpl_MemCpyReversedOrder(&decresidual[SUBL*Nback-1], reverseDecresidual, SUBL*Nback);
}
/* end encoding part */
/* adjust index */
WebRtcIlbcfix_IndexConvEnc(iLBCbits_inst->cb_index);
/* Packetize the parameters into the frame */
#ifdef SPLIT_10MS
if( (iLBCenc_inst->mode==30) && (iLBCenc_inst->section==1) ){
WebRtcIlbcfix_PackBits(iLBCenc_inst->bytes, iLBCbits_inst, iLBCenc_inst->mode);
}
else{
WebRtcIlbcfix_PackBits(bytes, iLBCbits_inst, iLBCenc_inst->mode);
}
#else
WebRtcIlbcfix_PackBits(bytes, iLBCbits_inst, iLBCenc_inst->mode);
#endif
#ifndef WEBRTC_ARCH_BIG_ENDIAN
/* Swap bytes for LITTLE ENDIAN since the packbits()
function assumes BIG_ENDIAN machine */
#ifdef SPLIT_10MS
if (( (iLBCenc_inst->section == 1) && (iLBCenc_inst->mode == 20) ) ||
( (iLBCenc_inst->section == 2) && (iLBCenc_inst->mode == 30) )){
WebRtcIlbcfix_SwapBytes(bytes, iLBCenc_inst->no_of_words, bytes);
}
#else
WebRtcIlbcfix_SwapBytes(bytes, iLBCenc_inst->no_of_words, bytes);
#endif
#endif
#ifdef SPLIT_10MS
if (subcount == (iLBCenc_inst->nsub - 1))
{
iLBCenc_inst->section = 0;
}
else
{
iLBCenc_inst->section++;
WEBRTC_SPL_MEMCPY_W16 (weightdenumbuf, weightdenum,
SCRATCH_ENCODE_DATAVEC - SCRATCH_ENCODE_WEIGHTDENUM);
}
#endif
}

38
modules/audio_coding/codecs/ilbc/encode.h
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@ -1,38 +0,0 @@
/*
* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_Encode.h
******************************************************************/
#ifndef MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_ENCODE_H_
#define MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_ENCODE_H_
#include <stddef.h>
#include <stdint.h>
#include "modules/audio_coding/codecs/ilbc/defines.h"
/*----------------------------------------------------------------*
* main encoder function
*---------------------------------------------------------------*/
void WebRtcIlbcfix_EncodeImpl(
uint16_t* bytes, /* (o) encoded data bits iLBC */
const int16_t* block, /* (i) speech vector to encode */
IlbcEncoder* iLBCenc_inst /* (i/o) the general encoder
state */
);
#endif

46
modules/audio_coding/codecs/ilbc/energy_inverse.c
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@ -1,46 +0,0 @@
/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_EnergyInverse.c
******************************************************************/
/* Inverses the in vector in into Q29 domain */
#include "modules/audio_coding/codecs/ilbc/energy_inverse.h"
void WebRtcIlbcfix_EnergyInverse(
int16_t *energy, /* (i/o) Energy and inverse
energy (in Q29) */
size_t noOfEnergies) /* (i) The length of the energy
vector */
{
int32_t Nom=(int32_t)0x1FFFFFFF;
int16_t *energyPtr;
size_t i;
/* Set the minimum energy value to 16384 to avoid overflow */
energyPtr=energy;
for (i=0; i<noOfEnergies; i++) {
(*energyPtr)=WEBRTC_SPL_MAX((*energyPtr),16384);
energyPtr++;
}
/* Calculate inverse energy in Q29 */
energyPtr=energy;
for (i=0; i<noOfEnergies; i++) {
(*energyPtr) = (int16_t)WebRtcSpl_DivW32W16(Nom, (*energyPtr));
energyPtr++;
}
}

36
modules/audio_coding/codecs/ilbc/energy_inverse.h
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@ -1,36 +0,0 @@
/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_EnergyInverse.h
******************************************************************/
#ifndef MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_ENERGY_INVERSE_H_
#define MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_ENERGY_INVERSE_H_
#include <stddef.h>
#include <stdint.h>
#include "modules/audio_coding/codecs/ilbc/defines.h"
/* Inverses the in vector in into Q29 domain */
void WebRtcIlbcfix_EnergyInverse(
int16_t*
energy, /* (i/o) Energy and inverse
energy (in Q29) */
size_t noOfEnergies); /* (i) The length of the energy
vector */
#endif

112
modules/audio_coding/codecs/ilbc/enh_upsample.c
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_EnhUpsample.c
******************************************************************/
#include "modules/audio_coding/codecs/ilbc/enh_upsample.h"
#include "modules/audio_coding/codecs/ilbc/constants.h"
#include "modules/audio_coding/codecs/ilbc/defines.h"
/*----------------------------------------------------------------*
* upsample finite array assuming zeros outside bounds
*---------------------------------------------------------------*/
void WebRtcIlbcfix_EnhUpsample(
int32_t *useq1, /* (o) upsampled output sequence */
int16_t *seq1 /* (i) unupsampled sequence */
){
int j;
int32_t *pu1, *pu11;
int16_t *ps, *w16tmp;
const int16_t *pp;
/* filtering: filter overhangs left side of sequence */
pu1=useq1;
for (j=0;j<ENH_UPS0; j++) {
pu11=pu1;
/* i = 2 */
pp=WebRtcIlbcfix_kEnhPolyPhaser[j]+1;
ps=seq1+2;
*pu11 = (*ps--) * *pp++;
*pu11 += (*ps--) * *pp++;
*pu11 += (*ps--) * *pp++;
pu11+=ENH_UPS0;
/* i = 3 */
pp=WebRtcIlbcfix_kEnhPolyPhaser[j]+1;
ps=seq1+3;
*pu11 = (*ps--) * *pp++;
*pu11 += (*ps--) * *pp++;
*pu11 += (*ps--) * *pp++;
*pu11 += (*ps--) * *pp++;
pu11+=ENH_UPS0;
/* i = 4 */
pp=WebRtcIlbcfix_kEnhPolyPhaser[j]+1;
ps=seq1+4;
*pu11 = (*ps--) * *pp++;
*pu11 += (*ps--) * *pp++;
*pu11 += (*ps--) * *pp++;
*pu11 += (*ps--) * *pp++;
*pu11 += (*ps--) * *pp++;
pu1++;
}
/* filtering: simple convolution=inner products
(not needed since the sequence is so short)
*/
/* filtering: filter overhangs right side of sequence */
/* Code with loops, which is equivivalent to the expanded version below
filterlength = 5;
hf1 = 2;
for(j=0;j<ENH_UPS0; j++){
pu = useq1 + (filterlength-hfl)*ENH_UPS0 + j;
for(i=1; i<=hfl; i++){
*pu=0;
pp = polyp[j]+i;
ps = seq1+dim1-1;
for(k=0;k<filterlength-i;k++) {
*pu += (*ps--) * *pp++;
}
pu+=ENH_UPS0;
}
}
*/
pu1 = useq1 + 12;
w16tmp = seq1+4;
for (j=0;j<ENH_UPS0; j++) {
pu11 = pu1;
/* i = 1 */
pp = WebRtcIlbcfix_kEnhPolyPhaser[j]+2;
ps = w16tmp;
*pu11 = (*ps--) * *pp++;
*pu11 += (*ps--) * *pp++;
*pu11 += (*ps--) * *pp++;
*pu11 += (*ps--) * *pp++;
pu11+=ENH_UPS0;
/* i = 2 */
pp = WebRtcIlbcfix_kEnhPolyPhaser[j]+3;
ps = w16tmp;
*pu11 = (*ps--) * *pp++;
*pu11 += (*ps--) * *pp++;
*pu11 += (*ps--) * *pp++;
pu11+=ENH_UPS0;
pu1++;
}
}

33
modules/audio_coding/codecs/ilbc/enh_upsample.h
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@ -1,33 +0,0 @@
/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_EnhUpsample.h
******************************************************************/
#ifndef MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_ENH_UPSAMPLE_H_
#define MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_ENH_UPSAMPLE_H_
#include "modules/audio_coding/codecs/ilbc/defines.h"
/*----------------------------------------------------------------*
* upsample finite array assuming zeros outside bounds
*---------------------------------------------------------------*/
void WebRtcIlbcfix_EnhUpsample(
int32_t* useq1, /* (o) upsampled output sequence */
int16_t* seq1 /* (i) unupsampled sequence */
);
#endif

53
modules/audio_coding/codecs/ilbc/enhancer.c
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@ -1,53 +0,0 @@
/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_Enhancer.c
******************************************************************/
#include "modules/audio_coding/codecs/ilbc/enhancer.h"
#include "modules/audio_coding/codecs/ilbc/constants.h"
#include "modules/audio_coding/codecs/ilbc/defines.h"
#include "modules/audio_coding/codecs/ilbc/get_sync_seq.h"
#include "modules/audio_coding/codecs/ilbc/smooth.h"
/*----------------------------------------------------------------*
* perform enhancement on idata+centerStartPos through
* idata+centerStartPos+ENH_BLOCKL-1
*---------------------------------------------------------------*/
void WebRtcIlbcfix_Enhancer(
int16_t *odata, /* (o) smoothed block, dimension blockl */
int16_t *idata, /* (i) data buffer used for enhancing */
size_t idatal, /* (i) dimension idata */
size_t centerStartPos, /* (i) first sample current block within idata */
size_t *period, /* (i) pitch period array (pitch bward-in time) */
const size_t *plocs, /* (i) locations where period array values valid */
size_t periodl /* (i) dimension of period and plocs */
){
/* Stack based */
int16_t surround[ENH_BLOCKL];
WebRtcSpl_MemSetW16(surround, 0, ENH_BLOCKL);
/* get said second sequence of segments */
WebRtcIlbcfix_GetSyncSeq(idata, idatal, centerStartPos, period, plocs,
periodl, ENH_HL, surround);
/* compute the smoothed output from said second sequence */
WebRtcIlbcfix_Smooth(odata, idata + centerStartPos, surround);
}

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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_Enhancer.h
******************************************************************/
#ifndef MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_ENHANCER_H_
#define MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_ENHANCER_H_
#include <stddef.h>
#include <stdint.h>
/*----------------------------------------------------------------*
* perform enhancement on idata+centerStartPos through
* idata+centerStartPos+ENH_BLOCKL-1
*---------------------------------------------------------------*/
void WebRtcIlbcfix_Enhancer(
int16_t* odata, /* (o) smoothed block, dimension blockl */
int16_t* idata, /* (i) data buffer used for enhancing */
size_t idatal, /* (i) dimension idata */
size_t centerStartPos, /* (i) first sample current block within idata */
size_t* period, /* (i) pitch period array (pitch bward-in time) */
const size_t* plocs, /* (i) locations where period array values valid */
size_t periodl /* (i) dimension of period and plocs */
);
#endif

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modules/audio_coding/codecs/ilbc/enhancer_interface.c
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_EnhancerInterface.c
******************************************************************/
#include "modules/audio_coding/codecs/ilbc/enhancer_interface.h"
#include <stdlib.h>
#include <string.h>
#include "modules/audio_coding/codecs/ilbc/constants.h"
#include "modules/audio_coding/codecs/ilbc/defines.h"
#include "modules/audio_coding/codecs/ilbc/enhancer.h"
#include "modules/audio_coding/codecs/ilbc/hp_output.h"
#include "modules/audio_coding/codecs/ilbc/xcorr_coef.h"
/*----------------------------------------------------------------*
* interface for enhancer
*---------------------------------------------------------------*/
size_t // (o) Estimated lag in end of in[]
WebRtcIlbcfix_EnhancerInterface(
int16_t* out, // (o) enhanced signal
const int16_t* in, // (i) unenhanced signal
IlbcDecoder* iLBCdec_inst) { // (i) buffers etc
size_t iblock;
size_t lag=20, tlag=20;
size_t inLen=iLBCdec_inst->blockl+120;
int16_t scale, scale1;
size_t plc_blockl;
int16_t *enh_buf;
size_t *enh_period;
int32_t tmp1, tmp2, max;
size_t new_blocks;
int16_t *enh_bufPtr1;
size_t i;
size_t k;
int16_t EnChange;
int16_t SqrtEnChange;
int16_t inc;
int16_t win;
int16_t *tmpW16ptr;
size_t startPos;
int16_t *plc_pred;
const int16_t *target, *regressor;
int16_t max16;
int shifts;
int32_t ener;
int16_t enerSh;
int16_t corrSh;
size_t ind;
int16_t sh;
size_t start, stop;
/* Stack based */
int16_t totsh[3];
int16_t downsampled[(BLOCKL_MAX+120)>>1]; /* length 180 */
int32_t corr32[50];
int32_t corrmax[3];
int16_t corr16[3];
int16_t en16[3];
size_t lagmax[3];
plc_pred = downsampled; /* Reuse memory since plc_pred[ENH_BLOCKL] and
downsampled are non overlapping */
enh_buf=iLBCdec_inst->enh_buf;
enh_period=iLBCdec_inst->enh_period;
/* Copy in the new data into the enhancer buffer */
memmove(enh_buf, &enh_buf[iLBCdec_inst->blockl],
(ENH_BUFL - iLBCdec_inst->blockl) * sizeof(*enh_buf));
WEBRTC_SPL_MEMCPY_W16(&enh_buf[ENH_BUFL-iLBCdec_inst->blockl], in,
iLBCdec_inst->blockl);
/* Set variables that are dependent on frame size */
if (iLBCdec_inst->mode==30) {
plc_blockl=ENH_BLOCKL;
new_blocks=3;
startPos=320; /* Start position for enhancement
(640-new_blocks*ENH_BLOCKL-80) */
} else {
plc_blockl=40;
new_blocks=2;
startPos=440; /* Start position for enhancement
(640-new_blocks*ENH_BLOCKL-40) */
}
/* Update the pitch prediction for each enhancer block, move the old ones */
memmove(enh_period, &enh_period[new_blocks],
(ENH_NBLOCKS_TOT - new_blocks) * sizeof(*enh_period));
WebRtcSpl_DownsampleFast(
enh_buf+ENH_BUFL-inLen, /* Input samples */
inLen + ENH_BUFL_FILTEROVERHEAD,
downsampled,
inLen / 2,
(int16_t*)WebRtcIlbcfix_kLpFiltCoefs, /* Coefficients in Q12 */
FILTERORDER_DS_PLUS1, /* Length of filter (order-1) */
FACTOR_DS,
DELAY_DS);
/* Estimate the pitch in the down sampled domain. */
for(iblock = 0; iblock<new_blocks; iblock++){
/* references */
target = downsampled + 60 + iblock * ENH_BLOCKL_HALF;
regressor = target - 10;
/* scaling */
max16 = WebRtcSpl_MaxAbsValueW16(&regressor[-50], ENH_BLOCKL_HALF + 50 - 1);
shifts = WebRtcSpl_GetSizeInBits((uint32_t)(max16 * max16)) - 25;
shifts = WEBRTC_SPL_MAX(0, shifts);
/* compute cross correlation */
WebRtcSpl_CrossCorrelation(corr32, target, regressor, ENH_BLOCKL_HALF, 50,
shifts, -1);
/* Find 3 highest correlations that should be compared for the
highest (corr*corr)/ener */
for (i=0;i<2;i++) {
lagmax[i] = WebRtcSpl_MaxIndexW32(corr32, 50);
corrmax[i] = corr32[lagmax[i]];
start = WEBRTC_SPL_MAX(2, lagmax[i]) - 2;
stop = WEBRTC_SPL_MIN(47, lagmax[i]) + 2;
for (k = start; k <= stop; k++) {
corr32[k] = 0;
}
}
lagmax[2] = WebRtcSpl_MaxIndexW32(corr32, 50);
corrmax[2] = corr32[lagmax[2]];
/* Calculate normalized corr^2 and ener */
for (i=0;i<3;i++) {
corrSh = 15-WebRtcSpl_GetSizeInBits(corrmax[i]);
ener = WebRtcSpl_DotProductWithScale(regressor - lagmax[i],
regressor - lagmax[i],
ENH_BLOCKL_HALF, shifts);
enerSh = 15-WebRtcSpl_GetSizeInBits(ener);
corr16[i] = (int16_t)WEBRTC_SPL_SHIFT_W32(corrmax[i], corrSh);
corr16[i] = (int16_t)((corr16[i] * corr16[i]) >> 16);
en16[i] = (int16_t)WEBRTC_SPL_SHIFT_W32(ener, enerSh);
totsh[i] = enerSh - 2 * corrSh;
}
/* Compare lagmax[0..3] for the (corr^2)/ener criteria */
ind = 0;
for (i=1; i<3; i++) {
if (totsh[ind] > totsh[i]) {
sh = WEBRTC_SPL_MIN(31, totsh[ind]-totsh[i]);
if (corr16[ind] * en16[i] < (corr16[i] * en16[ind]) >> sh) {
ind = i;
}
} else {
sh = WEBRTC_SPL_MIN(31, totsh[i]-totsh[ind]);
if ((corr16[ind] * en16[i]) >> sh < corr16[i] * en16[ind]) {
ind = i;
}
}
}
lag = lagmax[ind] + 10;
/* Store the estimated lag in the non-downsampled domain */
enh_period[ENH_NBLOCKS_TOT - new_blocks + iblock] = lag * 8;
/* Store the estimated lag for backward PLC */
if (iLBCdec_inst->prev_enh_pl==1) {
if (!iblock) {
tlag = lag * 2;
}
} else {
if (iblock==1) {
tlag = lag * 2;
}
}
lag *= 2;
}
if ((iLBCdec_inst->prev_enh_pl==1)||(iLBCdec_inst->prev_enh_pl==2)) {
/* Calculate the best lag of the new frame
This is used to interpolate backwards and mix with the PLC'd data
*/
/* references */
target=in;
regressor=in+tlag-1;
/* scaling */
// Note that this is not abs-max, so we will take the absolute value below.
max16 = WebRtcSpl_MaxAbsElementW16(regressor, plc_blockl + 3 - 1);
const int16_t max_target =
WebRtcSpl_MaxAbsElementW16(target, plc_blockl + 3 - 1);
const int64_t max_val = plc_blockl * abs(max16 * max_target);
const int32_t factor = max_val >> 31;
shifts = factor == 0 ? 0 : 31 - WebRtcSpl_NormW32(factor);
/* compute cross correlation */
WebRtcSpl_CrossCorrelation(corr32, target, regressor, plc_blockl, 3, shifts,
1);
/* find lag */
lag=WebRtcSpl_MaxIndexW32(corr32, 3);
lag+=tlag-1;
/* Copy the backward PLC to plc_pred */
if (iLBCdec_inst->prev_enh_pl==1) {
if (lag>plc_blockl) {
WEBRTC_SPL_MEMCPY_W16(plc_pred, &in[lag-plc_blockl], plc_blockl);
} else {
WEBRTC_SPL_MEMCPY_W16(&plc_pred[plc_blockl-lag], in, lag);
WEBRTC_SPL_MEMCPY_W16(
plc_pred, &enh_buf[ENH_BUFL-iLBCdec_inst->blockl-plc_blockl+lag],
(plc_blockl-lag));
}
} else {
size_t pos;
pos = plc_blockl;
while (lag<pos) {
WEBRTC_SPL_MEMCPY_W16(&plc_pred[pos-lag], in, lag);
pos = pos - lag;
}
WEBRTC_SPL_MEMCPY_W16(plc_pred, &in[lag-pos], pos);
}
if (iLBCdec_inst->prev_enh_pl==1) {
/* limit energy change
if energy in backward PLC is more than 4 times higher than the forward
PLC, then reduce the energy in the backward PLC vector:
sample 1...len-16 set energy of the to 4 times forward PLC
sample len-15..len interpolate between 4 times fw PLC and bw PLC energy
Note: Compared to floating point code there is a slight change,
the window is 16 samples long instead of 10 samples to simplify the
calculations
*/
max=WebRtcSpl_MaxAbsValueW16(
&enh_buf[ENH_BUFL-iLBCdec_inst->blockl-plc_blockl], plc_blockl);
max16=WebRtcSpl_MaxAbsValueW16(plc_pred, plc_blockl);
max = WEBRTC_SPL_MAX(max, max16);
scale=22-(int16_t)WebRtcSpl_NormW32(max);
scale=WEBRTC_SPL_MAX(scale,0);
tmp2 = WebRtcSpl_DotProductWithScale(
&enh_buf[ENH_BUFL-iLBCdec_inst->blockl-plc_blockl],
&enh_buf[ENH_BUFL-iLBCdec_inst->blockl-plc_blockl],
plc_blockl, scale);
tmp1 = WebRtcSpl_DotProductWithScale(plc_pred, plc_pred,
plc_blockl, scale);
/* Check the energy difference */
if ((tmp1>0)&&((tmp1>>2)>tmp2)) {
/* EnChange is now guaranteed to be <0.5
Calculate EnChange=tmp2/tmp1 in Q16
*/
scale1=(int16_t)WebRtcSpl_NormW32(tmp1);
tmp1=WEBRTC_SPL_SHIFT_W32(tmp1, (scale1-16)); /* using 15 bits */
tmp2=WEBRTC_SPL_SHIFT_W32(tmp2, (scale1));
EnChange = (int16_t)WebRtcSpl_DivW32W16(tmp2,
(int16_t)tmp1);
/* Calculate the Sqrt of the energy in Q15 ((14+16)/2) */
SqrtEnChange = (int16_t)WebRtcSpl_SqrtFloor(EnChange << 14);
/* Multiply first part of vector with 2*SqrtEnChange */
WebRtcSpl_ScaleVector(plc_pred, plc_pred, SqrtEnChange, plc_blockl-16,
14);
/* Calculate increase parameter for window part (16 last samples) */
/* (1-2*SqrtEnChange)/16 in Q15 */
inc = 2048 - (SqrtEnChange >> 3);
win=0;
tmpW16ptr=&plc_pred[plc_blockl-16];
for (i=16;i>0;i--) {
*tmpW16ptr = (int16_t)(
(*tmpW16ptr * (SqrtEnChange + (win >> 1))) >> 14);
/* multiply by (2.0*SqrtEnChange+win) */
win += inc;
tmpW16ptr++;
}
}
/* Make the linear interpolation between the forward PLC'd data
and the backward PLC'd data (from the new frame)
*/
if (plc_blockl==40) {
inc=400; /* 1/41 in Q14 */
} else { /* plc_blockl==80 */
inc=202; /* 1/81 in Q14 */
}
win=0;
enh_bufPtr1=&enh_buf[ENH_BUFL-1-iLBCdec_inst->blockl];
for (i=0; i<plc_blockl; i++) {
win+=inc;
*enh_bufPtr1 = (int16_t)((*enh_bufPtr1 * win) >> 14);
*enh_bufPtr1 += (int16_t)(
((16384 - win) * plc_pred[plc_blockl - 1 - i]) >> 14);
enh_bufPtr1--;
}
} else {
int16_t *synt = &downsampled[LPC_FILTERORDER];
enh_bufPtr1=&enh_buf[ENH_BUFL-iLBCdec_inst->blockl-plc_blockl];
WEBRTC_SPL_MEMCPY_W16(enh_bufPtr1, plc_pred, plc_blockl);
/* Clear fileter memory */
WebRtcSpl_MemSetW16(iLBCdec_inst->syntMem, 0, LPC_FILTERORDER);
WebRtcSpl_MemSetW16(iLBCdec_inst->hpimemy, 0, 4);
WebRtcSpl_MemSetW16(iLBCdec_inst->hpimemx, 0, 2);
/* Initialize filter memory by filtering through 2 lags */
WEBRTC_SPL_MEMCPY_W16(&synt[-LPC_FILTERORDER], iLBCdec_inst->syntMem,
LPC_FILTERORDER);
WebRtcSpl_FilterARFastQ12(
enh_bufPtr1,
synt,
&iLBCdec_inst->old_syntdenum[
(iLBCdec_inst->nsub-1)*(LPC_FILTERORDER+1)],
LPC_FILTERORDER+1, lag);
WEBRTC_SPL_MEMCPY_W16(&synt[-LPC_FILTERORDER], &synt[lag-LPC_FILTERORDER],
LPC_FILTERORDER);
WebRtcIlbcfix_HpOutput(synt, (int16_t*)WebRtcIlbcfix_kHpOutCoefs,
iLBCdec_inst->hpimemy, iLBCdec_inst->hpimemx,
lag);
WebRtcSpl_FilterARFastQ12(
enh_bufPtr1, synt,
&iLBCdec_inst->old_syntdenum[
(iLBCdec_inst->nsub-1)*(LPC_FILTERORDER+1)],
LPC_FILTERORDER+1, lag);
WEBRTC_SPL_MEMCPY_W16(iLBCdec_inst->syntMem, &synt[lag-LPC_FILTERORDER],
LPC_FILTERORDER);
WebRtcIlbcfix_HpOutput(synt, (int16_t*)WebRtcIlbcfix_kHpOutCoefs,
iLBCdec_inst->hpimemy, iLBCdec_inst->hpimemx,
lag);
}
}
/* Perform enhancement block by block */
for (iblock = 0; iblock<new_blocks; iblock++) {
WebRtcIlbcfix_Enhancer(out + iblock * ENH_BLOCKL,
enh_buf,
ENH_BUFL,
iblock * ENH_BLOCKL + startPos,
enh_period,
WebRtcIlbcfix_kEnhPlocs, ENH_NBLOCKS_TOT);
}
return (lag);
}

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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_EnhancerInterface.h
******************************************************************/
#ifndef MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_ENHANCER_INTERFACE_H_
#define MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_ENHANCER_INTERFACE_H_
#include <stddef.h>
#include <stdint.h>
#include "modules/audio_coding/codecs/ilbc/defines.h"
/*----------------------------------------------------------------*
* interface for enhancer
*---------------------------------------------------------------*/
size_t // (o) Estimated lag in end of in[]
WebRtcIlbcfix_EnhancerInterface(int16_t* out, // (o) enhanced signal
const int16_t* in, // (i) unenhanced signal
IlbcDecoder* iLBCdec_inst); // (i) buffers etc
#endif

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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_FilteredCbVecs.c
******************************************************************/
#include "modules/audio_coding/codecs/ilbc/filtered_cb_vecs.h"
#include "modules/audio_coding/codecs/ilbc/constants.h"
#include "modules/audio_coding/codecs/ilbc/defines.h"
/*----------------------------------------------------------------*
* Construct an additional codebook vector by filtering the
* initial codebook buffer. This vector is then used to expand
* the codebook with an additional section.
*---------------------------------------------------------------*/
void WebRtcIlbcfix_FilteredCbVecs(
int16_t *cbvectors, /* (o) Codebook vector for the higher section */
int16_t *CBmem, /* (i) Codebook memory that is filtered to create a
second CB section */
size_t lMem, /* (i) Length of codebook memory */
size_t samples /* (i) Number of samples to filter */
) {
/* Set up the memory, start with zero state */
WebRtcSpl_MemSetW16(CBmem+lMem, 0, CB_HALFFILTERLEN);
WebRtcSpl_MemSetW16(CBmem-CB_HALFFILTERLEN, 0, CB_HALFFILTERLEN);
WebRtcSpl_MemSetW16(cbvectors, 0, lMem-samples);
/* Filter to obtain the filtered CB memory */
WebRtcSpl_FilterMAFastQ12(
CBmem+CB_HALFFILTERLEN+lMem-samples, cbvectors+lMem-samples,
(int16_t*)WebRtcIlbcfix_kCbFiltersRev, CB_FILTERLEN, samples);
return;
}

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modules/audio_coding/codecs/ilbc/filtered_cb_vecs.h
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_FilteredCbVecs.h
******************************************************************/
#ifndef MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_FILTERED_CB_VECS_H_
#define MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_FILTERED_CB_VECS_H_
#include <stddef.h>
#include <stdint.h>
/*----------------------------------------------------------------*
* Construct an additional codebook vector by filtering the
* initial codebook buffer. This vector is then used to expand
* the codebook with an additional section.
*---------------------------------------------------------------*/
void WebRtcIlbcfix_FilteredCbVecs(
int16_t* cbvectors, /* (o) Codebook vector for the higher section */
int16_t* CBmem, /* (i) Codebook memory that is filtered to create a
second CB section */
size_t lMem, /* (i) Length of codebook memory */
size_t samples /* (i) Number of samples to filter */
);
#endif

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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_FrameClassify.c
******************************************************************/
#include "modules/audio_coding/codecs/ilbc/frame_classify.h"
#include "modules/audio_coding/codecs/ilbc/constants.h"
#include "modules/audio_coding/codecs/ilbc/defines.h"
/*----------------------------------------------------------------*
* Classification of subframes to localize start state
*---------------------------------------------------------------*/
size_t WebRtcIlbcfix_FrameClassify(
/* (o) Index to the max-energy sub frame */
IlbcEncoder *iLBCenc_inst,
/* (i/o) the encoder state structure */
int16_t *residualFIX /* (i) lpc residual signal */
){
int16_t max, scale;
int32_t ssqEn[NSUB_MAX-1];
int16_t *ssqPtr;
int32_t *seqEnPtr;
int32_t maxW32;
int16_t scale1;
size_t pos;
size_t n;
/*
Calculate the energy of each of the 80 sample blocks
in the draft the 4 first and last samples are windowed with 1/5...4/5
and 4/5...1/5 respectively. To simplify for the fixpoint we have changed
this to 0 0 1 1 and 1 1 0 0
*/
max = WebRtcSpl_MaxAbsValueW16(residualFIX, iLBCenc_inst->blockl);
scale = WebRtcSpl_GetSizeInBits((uint32_t)(max * max));
/* Scale to maximum 24 bits so that it won't overflow for 76 samples */
scale = scale-24;
scale1 = WEBRTC_SPL_MAX(0, scale);
/* Calculate energies */
ssqPtr=residualFIX + 2;
seqEnPtr=ssqEn;
for (n=(iLBCenc_inst->nsub-1); n>0; n--) {
(*seqEnPtr) = WebRtcSpl_DotProductWithScale(ssqPtr, ssqPtr, 76, scale1);
ssqPtr += 40;
seqEnPtr++;
}
/* Scale to maximum 20 bits in order to allow for the 11 bit window */
maxW32 = WebRtcSpl_MaxValueW32(ssqEn, iLBCenc_inst->nsub - 1);
scale = WebRtcSpl_GetSizeInBits(maxW32) - 20;
scale1 = WEBRTC_SPL_MAX(0, scale);
/* Window each 80 block with the ssqEn_winTbl window to give higher probability for
the blocks in the middle
*/
seqEnPtr=ssqEn;
if (iLBCenc_inst->mode==20) {
ssqPtr=(int16_t*)WebRtcIlbcfix_kStartSequenceEnrgWin+1;
} else {
ssqPtr=(int16_t*)WebRtcIlbcfix_kStartSequenceEnrgWin;
}
for (n=(iLBCenc_inst->nsub-1); n>0; n--) {
(*seqEnPtr)=WEBRTC_SPL_MUL(((*seqEnPtr)>>scale1), (*ssqPtr));
seqEnPtr++;
ssqPtr++;
}
/* Extract the best choise of start state */
pos = WebRtcSpl_MaxIndexW32(ssqEn, iLBCenc_inst->nsub - 1) + 1;
return(pos);
}

34
modules/audio_coding/codecs/ilbc/frame_classify.h
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_FrameClassify.h
******************************************************************/
#ifndef MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_FRAME_CLASSIFY_H_
#define MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_FRAME_CLASSIFY_H_
#include <stddef.h>
#include <stdint.h>
#include "modules/audio_coding/codecs/ilbc/defines.h"
size_t WebRtcIlbcfix_FrameClassify(
/* (o) Index to the max-energy sub frame */
IlbcEncoder* iLBCenc_inst,
/* (i/o) the encoder state structure */
int16_t* residualFIX /* (i) lpc residual signal */
);
#endif

47
modules/audio_coding/codecs/ilbc/gain_dequant.c
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_GainDequant.c
******************************************************************/
#include "modules/audio_coding/codecs/ilbc/gain_dequant.h"
#include "modules/audio_coding/codecs/ilbc/constants.h"
#include "modules/audio_coding/codecs/ilbc/defines.h"
/*----------------------------------------------------------------*
* decoder for quantized gains in the gain-shape coding of
* residual
*---------------------------------------------------------------*/
int16_t WebRtcIlbcfix_GainDequant(
/* (o) quantized gain value (Q14) */
int16_t index, /* (i) quantization index */
int16_t maxIn, /* (i) maximum of unquantized gain (Q14) */
int16_t stage /* (i) The stage of the search */
){
int16_t scale;
const int16_t *gain;
/* obtain correct scale factor */
scale=WEBRTC_SPL_ABS_W16(maxIn);
scale = WEBRTC_SPL_MAX(1638, scale); /* if lower than 0.1, set it to 0.1 */
/* select the quantization table and return the decoded value */
gain = WebRtcIlbcfix_kGain[stage];
return (int16_t)((scale * gain[index] + 8192) >> 14);
}

36
modules/audio_coding/codecs/ilbc/gain_dequant.h
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_GainDequant.h
******************************************************************/
#ifndef MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_GAIN_DEQUANT_H_
#define MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_GAIN_DEQUANT_H_
#include <stdint.h>
/*----------------------------------------------------------------*
* decoder for quantized gains in the gain-shape coding of
* residual
*---------------------------------------------------------------*/
int16_t WebRtcIlbcfix_GainDequant(
/* (o) quantized gain value (Q14) */
int16_t index, /* (i) quantization index */
int16_t maxIn, /* (i) maximum of unquantized gain (Q14) */
int16_t stage /* (i) The stage of the search */
);
#endif

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modules/audio_coding/codecs/ilbc/gain_quant.c
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_GainQuant.c
******************************************************************/
#include "modules/audio_coding/codecs/ilbc/gain_quant.h"
#include "modules/audio_coding/codecs/ilbc/constants.h"
#include "modules/audio_coding/codecs/ilbc/defines.h"
/*----------------------------------------------------------------*
* quantizer for the gain in the gain-shape coding of residual
*---------------------------------------------------------------*/
int16_t WebRtcIlbcfix_GainQuant( /* (o) quantized gain value */
int16_t gain, /* (i) gain value Q14 */
int16_t maxIn, /* (i) maximum of gain value Q14 */
int16_t stage, /* (i) The stage of the search */
int16_t *index /* (o) quantization index */
) {
int16_t scale, cblen;
int32_t gainW32, measure1, measure2;
const int16_t *cbPtr, *cb;
int loc, noMoves, noChecks, i;
/* ensure a lower bound (0.1) on the scaling factor */
scale = WEBRTC_SPL_MAX(1638, maxIn);
/* select the quantization table and calculate
the length of the table and the number of
steps in the binary search that are needed */
cb = WebRtcIlbcfix_kGain[stage];
cblen = 32>>stage;
noChecks = 4-stage;
/* Multiply the gain with 2^14 to make the comparison
easier and with higher precision */
gainW32 = gain << 14;
/* Do a binary search, starting in the middle of the CB
loc - defines the current position in the table
noMoves - defines the number of steps to move in the CB in order
to get next CB location
*/
loc = cblen>>1;
noMoves = loc;
cbPtr = cb + loc; /* Centre of CB */
for (i=noChecks;i>0;i--) {
noMoves>>=1;
measure1 = scale * *cbPtr;
/* Move up if gain is larger, otherwise move down in table */
measure1 = measure1 - gainW32;
if (0>measure1) {
cbPtr+=noMoves;
loc+=noMoves;
} else {
cbPtr-=noMoves;
loc-=noMoves;
}
}
/* Check which value is the closest one: loc-1, loc or loc+1 */
measure1 = scale * *cbPtr;
if (gainW32>measure1) {
/* Check against value above loc */
measure2 = scale * cbPtr[1];
if ((measure2-gainW32)<(gainW32-measure1)) {
loc+=1;
}
} else {
/* Check against value below loc */
measure2 = scale * cbPtr[-1];
if ((gainW32-measure2)<=(measure1-gainW32)) {
loc-=1;
}
}
/* Guard against getting outside the table. The calculation above can give a location
which is one above the maximum value (in very rare cases) */
loc=WEBRTC_SPL_MIN(loc, (cblen-1));
*index=loc;
/* Calculate and return the quantized gain value (in Q14) */
return (int16_t)((scale * cb[loc] + 8192) >> 14);
}

36
modules/audio_coding/codecs/ilbc/gain_quant.h
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_GainQuant.h
******************************************************************/
#ifndef MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_GAIN_QUANT_H_
#define MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_GAIN_QUANT_H_
#include <stdint.h>
/*----------------------------------------------------------------*
* quantizer for the gain in the gain-shape coding of residual
*---------------------------------------------------------------*/
int16_t
WebRtcIlbcfix_GainQuant( /* (o) quantized gain value */
int16_t gain, /* (i) gain value Q14 */
int16_t maxIn, /* (i) maximum of gain value Q14 */
int16_t stage, /* (i) The stage of the search */
int16_t* index /* (o) quantization index */
);
#endif

126
modules/audio_coding/codecs/ilbc/get_cd_vec.c
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_GetCbVec.c
******************************************************************/
#include "modules/audio_coding/codecs/ilbc/get_cd_vec.h"
#include "modules/audio_coding/codecs/ilbc/constants.h"
#include "modules/audio_coding/codecs/ilbc/create_augmented_vec.h"
#include "modules/audio_coding/codecs/ilbc/defines.h"
/*----------------------------------------------------------------*
* Construct codebook vector for given index.
*---------------------------------------------------------------*/
bool WebRtcIlbcfix_GetCbVec(
int16_t *cbvec, /* (o) Constructed codebook vector */
int16_t *mem, /* (i) Codebook buffer */
size_t index, /* (i) Codebook index */
size_t lMem, /* (i) Length of codebook buffer */
size_t cbveclen /* (i) Codebook vector length */
){
size_t k, base_size;
size_t lag;
/* Stack based */
int16_t tempbuff2[SUBL+5];
/* Determine size of codebook sections */
base_size=lMem-cbveclen+1;
if (cbveclen==SUBL) {
base_size += cbveclen / 2;
}
/* No filter -> First codebook section */
if (index<lMem-cbveclen+1) {
/* first non-interpolated vectors */
k=index+cbveclen;
/* get vector */
WEBRTC_SPL_MEMCPY_W16(cbvec, mem+lMem-k, cbveclen);
} else if (index < base_size) {
/* Calculate lag */
k = (2 * (index - (lMem - cbveclen + 1))) + cbveclen;
lag = k / 2;
WebRtcIlbcfix_CreateAugmentedVec(lag, mem+lMem, cbvec);
}
/* Higher codebbok section based on filtering */
else {
size_t memIndTest;
/* first non-interpolated vectors */
if (index-base_size<lMem-cbveclen+1) {
/* Set up filter memory, stuff zeros outside memory buffer */
memIndTest = lMem-(index-base_size+cbveclen);
WebRtcSpl_MemSetW16(mem-CB_HALFFILTERLEN, 0, CB_HALFFILTERLEN);
WebRtcSpl_MemSetW16(mem+lMem, 0, CB_HALFFILTERLEN);
/* do filtering to get the codebook vector */
WebRtcSpl_FilterMAFastQ12(
&mem[memIndTest+4], cbvec, (int16_t*)WebRtcIlbcfix_kCbFiltersRev,
CB_FILTERLEN, cbveclen);
}
/* interpolated vectors */
else {
if (cbveclen < SUBL) {
// We're going to fill in cbveclen + 5 elements of tempbuff2 in
// WebRtcSpl_FilterMAFastQ12, less than the SUBL + 5 elements we'll be
// using in WebRtcIlbcfix_CreateAugmentedVec. This error is caused by
// bad values in `index` (which come from the encoded stream). Tell the
// caller that things went south, and that the decoder state is now
// corrupt (because it's half-way through an update that we can't
// complete).
return false;
}
/* Stuff zeros outside memory buffer */
memIndTest = lMem-cbveclen-CB_FILTERLEN;
WebRtcSpl_MemSetW16(mem+lMem, 0, CB_HALFFILTERLEN);
/* do filtering */
WebRtcSpl_FilterMAFastQ12(
&mem[memIndTest+7], tempbuff2, (int16_t*)WebRtcIlbcfix_kCbFiltersRev,
CB_FILTERLEN, cbveclen+5);
/* Calculate lag index */
lag = (cbveclen<<1)-20+index-base_size-lMem-1;
WebRtcIlbcfix_CreateAugmentedVec(lag, tempbuff2+SUBL+5, cbvec);
}
}
return true; // Success.
}

40
modules/audio_coding/codecs/ilbc/get_cd_vec.h
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_GetCbVec.h
******************************************************************/
#ifndef MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_GET_CD_VEC_H_
#define MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_GET_CD_VEC_H_
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include "absl/base/attributes.h"
#include "modules/audio_coding/codecs/ilbc/defines.h"
// Returns true on success, false on failure. In case of failure, the decoder
// state may be corrupted and needs resetting.
ABSL_MUST_USE_RESULT
bool WebRtcIlbcfix_GetCbVec(
int16_t* cbvec, /* (o) Constructed codebook vector */
int16_t* mem, /* (i) Codebook buffer */
size_t index, /* (i) Codebook index */
size_t lMem, /* (i) Length of codebook buffer */
size_t cbveclen /* (i) Codebook vector length */
);
#endif

84
modules/audio_coding/codecs/ilbc/get_lsp_poly.c
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_GetLspPoly.c
******************************************************************/
#include "modules/audio_coding/codecs/ilbc/get_lsp_poly.h"
#include "modules/audio_coding/codecs/ilbc/defines.h"
/*----------------------------------------------------------------*
* Construct the polynomials F1(z) and F2(z) from the LSP
* (Computations are done in Q24)
*
* The expansion is performed using the following recursion:
*
* f[0] = 1;
* tmp = -2.0 * lsp[0];
* f[1] = tmp;
* for (i=2; i<=5; i++) {
* b = -2.0 * lsp[2*i-2];
* f[i] = tmp*f[i-1] + 2.0*f[i-2];
* for (j=i; j>=2; j--) {
* f[j] = f[j] + tmp*f[j-1] + f[j-2];
* }
* f[i] = f[i] + tmp;
* }
*---------------------------------------------------------------*/
void WebRtcIlbcfix_GetLspPoly(
int16_t *lsp, /* (i) LSP in Q15 */
int32_t *f) /* (o) polonymial in Q24 */
{
int32_t tmpW32;
int i, j;
int16_t high, low;
int16_t *lspPtr;
int32_t *fPtr;
lspPtr = lsp;
fPtr = f;
/* f[0] = 1.0 (Q24) */
(*fPtr) = (int32_t)16777216;
fPtr++;
(*fPtr) = WEBRTC_SPL_MUL((*lspPtr), -1024);
fPtr++;
lspPtr+=2;
for(i=2; i<=5; i++)
{
(*fPtr) = fPtr[-2];
for(j=i; j>1; j--)
{
/* Compute f[j] = f[j] + tmp*f[j-1] + f[j-2]; */
high = (int16_t)(fPtr[-1] >> 16);
low = (int16_t)((fPtr[-1] & 0xffff) >> 1);
tmpW32 = 4 * high * *lspPtr + 4 * ((low * *lspPtr) >> 15);
(*fPtr) += fPtr[-2];
(*fPtr) -= tmpW32;
fPtr--;
}
*fPtr -= *lspPtr * (1 << 10);
fPtr+=i;
lspPtr+=2;
}
return;
}

46
modules/audio_coding/codecs/ilbc/get_lsp_poly.h
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_GetLspPoly.h
******************************************************************/
#ifndef MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_GET_LSP_POLY_H_
#define MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_GET_LSP_POLY_H_
#include <stdint.h>
/*----------------------------------------------------------------*
* Construct the polynomials F1(z) and F2(z) from the LSP
* (Computations are done in Q24)
*
* The expansion is performed using the following recursion:
*
* f[0] = 1;
* tmp = -2.0 * lsp[0];
* f[1] = tmp;
* for (i=2; i<=5; i++) {
* b = -2.0 * lsp[2*i-2];
* f[i] = tmp*f[i-1] + 2.0*f[i-2];
* for (j=i; j>=2; j--) {
* f[j] = f[j] + tmp*f[j-1] + f[j-2];
* }
* f[i] = f[i] + tmp;
* }
*---------------------------------------------------------------*/
void WebRtcIlbcfix_GetLspPoly(int16_t* lsp, /* (i) LSP in Q15 */
int32_t* f); /* (o) polonymial in Q24 */
#endif

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modules/audio_coding/codecs/ilbc/get_sync_seq.c
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_GetSyncSeq.c
******************************************************************/
#include "modules/audio_coding/codecs/ilbc/get_sync_seq.h"
#include "modules/audio_coding/codecs/ilbc/constants.h"
#include "modules/audio_coding/codecs/ilbc/defines.h"
#include "modules/audio_coding/codecs/ilbc/nearest_neighbor.h"
#include "modules/audio_coding/codecs/ilbc/refiner.h"
/*----------------------------------------------------------------*
* get the pitch-synchronous sample sequence
*---------------------------------------------------------------*/
void WebRtcIlbcfix_GetSyncSeq(
int16_t *idata, /* (i) original data */
size_t idatal, /* (i) dimension of data */
size_t centerStartPos, /* (i) where current block starts */
size_t *period, /* (i) rough-pitch-period array (Q-2) */
const size_t *plocs, /* (i) where periods of period array are taken (Q-2) */
size_t periodl, /* (i) dimension period array */
size_t hl, /* (i) 2*hl+1 is the number of sequences */
int16_t *surround /* (i/o) The contribution from this sequence
summed with earlier contributions */
){
size_t i, centerEndPos, q;
/* Stack based */
size_t lagBlock[2 * ENH_HL + 1];
size_t blockStartPos[2 * ENH_HL + 1]; /* The position to search around (Q2) */
size_t plocs2[ENH_PLOCSL];
centerEndPos = centerStartPos + ENH_BLOCKL - 1;
/* present (find predicted lag from this position) */
WebRtcIlbcfix_NearestNeighbor(lagBlock + hl,
plocs,
2 * (centerStartPos + centerEndPos),
periodl);
blockStartPos[hl] = 4 * centerStartPos;
/* past (find predicted position and perform a refined
search to find the best sequence) */
for (q = hl; q > 0; q--) {
size_t qq = q - 1;
size_t period_q = period[lagBlock[q]];
/* Stop if this sequence would be outside the buffer; that means all
further-past sequences would also be outside the buffer. */
if (blockStartPos[q] < period_q + (4 * ENH_OVERHANG))
break;
blockStartPos[qq] = blockStartPos[q] - period_q;
size_t value = blockStartPos[qq] + 4 * ENH_BLOCKL_HALF;
value = (value > period_q) ? (value - period_q) : 0;
WebRtcIlbcfix_NearestNeighbor(lagBlock + qq, plocs, value, periodl);
/* Find the best possible sequence in the 4 times upsampled
domain around blockStartPos+q */
WebRtcIlbcfix_Refiner(blockStartPos + qq, idata, idatal, centerStartPos,
blockStartPos[qq], surround,
WebRtcIlbcfix_kEnhWt[qq]);
}
/* future (find predicted position and perform a refined
search to find the best sequence) */
for (i = 0; i < periodl; i++) {
plocs2[i] = plocs[i] - period[i];
}
for (q = hl + 1; q <= (2 * hl); q++) {
WebRtcIlbcfix_NearestNeighbor(
lagBlock + q,
plocs2,
blockStartPos[q - 1] + 4 * ENH_BLOCKL_HALF,
periodl);
blockStartPos[q]=blockStartPos[q-1]+period[lagBlock[q]];
if (blockStartPos[q] + 4 * (ENH_BLOCKL + ENH_OVERHANG) < 4 * idatal) {
/* Find the best possible sequence in the 4 times upsampled
domain around blockStartPos+q */
WebRtcIlbcfix_Refiner(blockStartPos + q, idata, idatal, centerStartPos,
blockStartPos[q], surround,
WebRtcIlbcfix_kEnhWt[2 * hl - q]);
} else {
/* Don't add anything since this sequence would
be outside the buffer */
}
}
}

41
modules/audio_coding/codecs/ilbc/get_sync_seq.h
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_GetSyncSeq.h
******************************************************************/
#ifndef MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_GET_SYNC_SEQ_H_
#define MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_GET_SYNC_SEQ_H_
#include <stddef.h>
#include <stdint.h>
/*----------------------------------------------------------------*
* get the pitch-synchronous sample sequence
*---------------------------------------------------------------*/
void WebRtcIlbcfix_GetSyncSeq(
int16_t* idata, /* (i) original data */
size_t idatal, /* (i) dimension of data */
size_t centerStartPos, /* (i) where current block starts */
size_t* period, /* (i) rough-pitch-period array (Q-2) */
const size_t* plocs, /* (i) where periods of period array are taken (Q-2) */
size_t periodl, /* (i) dimension period array */
size_t hl, /* (i) 2*hl+1 is the number of sequences */
int16_t* surround /* (i/o) The contribution from this sequence
summed with earlier contributions */
);
#endif

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modules/audio_coding/codecs/ilbc/hp_input.c
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_HpInput.c
******************************************************************/
#include "modules/audio_coding/codecs/ilbc/hp_input.h"
#include "modules/audio_coding/codecs/ilbc/defines.h"
/*----------------------------------------------------------------*
* high-pass filter of input with *0.5 and saturation
*---------------------------------------------------------------*/
void WebRtcIlbcfix_HpInput(
int16_t *signal, /* (i/o) signal vector */
int16_t *ba, /* (i) B- and A-coefficients (2:nd order)
{b[0] b[1] b[2] -a[1] -a[2]} a[0]
is assumed to be 1.0 */
int16_t *y, /* (i/o) Filter state yhi[n-1] ylow[n-1]
yhi[n-2] ylow[n-2] */
int16_t *x, /* (i/o) Filter state x[n-1] x[n-2] */
size_t len) /* (i) Number of samples to filter */
{
size_t i;
int32_t tmpW32;
int32_t tmpW32b;
for (i=0; i<len; i++) {
/*
y[i] = b[0]*x[i] + b[1]*x[i-1] + b[2]*x[i-2]
+ (-a[1])*y[i-1] + (-a[2])*y[i-2];
*/
tmpW32 = y[1] * ba[3]; /* (-a[1])*y[i-1] (low part) */
tmpW32 += y[3] * ba[4]; /* (-a[2])*y[i-2] (low part) */
tmpW32 = (tmpW32>>15);
tmpW32 += y[0] * ba[3]; /* (-a[1])*y[i-1] (high part) */
tmpW32 += y[2] * ba[4]; /* (-a[2])*y[i-2] (high part) */
tmpW32 = (tmpW32<<1);
tmpW32 += signal[i] * ba[0]; /* b[0]*x[0] */
tmpW32 += x[0] * ba[1]; /* b[1]*x[i-1] */
tmpW32 += x[1] * ba[2]; /* b[2]*x[i-2] */
/* Update state (input part) */
x[1] = x[0];
x[0] = signal[i];
/* Rounding in Q(12+1), i.e. add 2^12 */
tmpW32b = tmpW32 + 4096;
/* Saturate (to 2^28) so that the HP filtered signal does not overflow */
tmpW32b = WEBRTC_SPL_SAT((int32_t)268435455, tmpW32b, (int32_t)-268435456);
/* Convert back to Q0 and multiply with 0.5 */
signal[i] = (int16_t)(tmpW32b >> 13);
/* Update state (filtered part) */
y[2] = y[0];
y[3] = y[1];
/* upshift tmpW32 by 3 with saturation */
if (tmpW32>268435455) {
tmpW32 = WEBRTC_SPL_WORD32_MAX;
} else if (tmpW32<-268435456) {
tmpW32 = WEBRTC_SPL_WORD32_MIN;
} else {
tmpW32 <<= 3;
}
y[0] = (int16_t)(tmpW32 >> 16);
y[1] = (int16_t)((tmpW32 - (y[0] << 16)) >> 1);
}
return;
}

38
modules/audio_coding/codecs/ilbc/hp_input.h
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@ -1,38 +0,0 @@
/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_HpInput.h
******************************************************************/
#ifndef MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_HP_INPUT_H_
#define MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_HP_INPUT_H_
#include <stddef.h>
#include <stdint.h>
// clang-format off
// Bad job here. https://bugs.llvm.org/show_bug.cgi?id=34274
void WebRtcIlbcfix_HpInput(
int16_t* signal, /* (i/o) signal vector */
int16_t* ba, /* (i) B- and A-coefficients (2:nd order)
{b[0] b[1] b[2] -a[1] -a[2]}
a[0] is assumed to be 1.0 */
int16_t* y, /* (i/o) Filter state yhi[n-1] ylow[n-1]
yhi[n-2] ylow[n-2] */
int16_t* x, /* (i/o) Filter state x[n-1] x[n-2] */
size_t len); /* (i) Number of samples to filter */
// clang-format on
#endif

91
modules/audio_coding/codecs/ilbc/hp_output.c
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_HpOutput.c
******************************************************************/
#include "modules/audio_coding/codecs/ilbc/hp_output.h"
#include "modules/audio_coding/codecs/ilbc/defines.h"
/*----------------------------------------------------------------*
* high-pass filter of output and *2 with saturation
*---------------------------------------------------------------*/
void WebRtcIlbcfix_HpOutput(
int16_t *signal, /* (i/o) signal vector */
int16_t *ba, /* (i) B- and A-coefficients (2:nd order)
{b[0] b[1] b[2] -a[1] -a[2]} a[0]
is assumed to be 1.0 */
int16_t *y, /* (i/o) Filter state yhi[n-1] ylow[n-1]
yhi[n-2] ylow[n-2] */
int16_t *x, /* (i/o) Filter state x[n-1] x[n-2] */
size_t len) /* (i) Number of samples to filter */
{
size_t i;
int32_t tmpW32;
int32_t tmpW32b;
for (i=0; i<len; i++) {
/*
y[i] = b[0]*x[i] + b[1]*x[i-1] + b[2]*x[i-2]
+ (-a[1])*y[i-1] + (-a[2])*y[i-2];
*/
tmpW32 = y[1] * ba[3]; /* (-a[1])*y[i-1] (low part) */
tmpW32 += y[3] * ba[4]; /* (-a[2])*y[i-2] (low part) */
tmpW32 = (tmpW32>>15);
tmpW32 += y[0] * ba[3]; /* (-a[1])*y[i-1] (high part) */
tmpW32 += y[2] * ba[4]; /* (-a[2])*y[i-2] (high part) */
tmpW32 *= 2;
tmpW32 += signal[i] * ba[0]; /* b[0]*x[0] */
tmpW32 += x[0] * ba[1]; /* b[1]*x[i-1] */
tmpW32 += x[1] * ba[2]; /* b[2]*x[i-2] */
/* Update state (input part) */
x[1] = x[0];
x[0] = signal[i];
/* Rounding in Q(12-1), i.e. add 2^10 */
tmpW32b = tmpW32 + 1024;
/* Saturate (to 2^26) so that the HP filtered signal does not overflow */
tmpW32b = WEBRTC_SPL_SAT((int32_t)67108863, tmpW32b, (int32_t)-67108864);
/* Convert back to Q0 and multiply with 2 */
signal[i] = (int16_t)(tmpW32b >> 11);
/* Update state (filtered part) */
y[2] = y[0];
y[3] = y[1];
/* upshift tmpW32 by 3 with saturation */
if (tmpW32>268435455) {
tmpW32 = WEBRTC_SPL_WORD32_MAX;
} else if (tmpW32<-268435456) {
tmpW32 = WEBRTC_SPL_WORD32_MIN;
} else {
tmpW32 *= 8;
}
y[0] = (int16_t)(tmpW32 >> 16);
y[1] = (int16_t)((tmpW32 & 0xffff) >> 1);
}
return;
}

38
modules/audio_coding/codecs/ilbc/hp_output.h
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@ -1,38 +0,0 @@
/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_HpOutput.h
******************************************************************/
#ifndef MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_HP_OUTPUT_H_
#define MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_HP_OUTPUT_H_
#include <stddef.h>
#include <stdint.h>
// clang-format off
// Bad job here. https://bugs.llvm.org/show_bug.cgi?id=34274
void WebRtcIlbcfix_HpOutput(
int16_t* signal, /* (i/o) signal vector */
int16_t* ba, /* (i) B- and A-coefficients (2:nd order)
{b[0] b[1] b[2] -a[1] -a[2]} a[0]
is assumed to be 1.0 */
int16_t* y, /* (i/o) Filter state yhi[n-1] ylow[n-1]
yhi[n-2] ylow[n-2] */
int16_t* x, /* (i/o) Filter state x[n-1] x[n-2] */
size_t len); /* (i) Number of samples to filter */
// clang-format on
#endif

288
modules/audio_coding/codecs/ilbc/ilbc.c
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@ -1,288 +0,0 @@
/*
* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
iLBCInterface.c
******************************************************************/
#include "modules/audio_coding/codecs/ilbc/ilbc.h"
#include <stdlib.h>
#include "modules/audio_coding/codecs/ilbc/decode.h"
#include "modules/audio_coding/codecs/ilbc/defines.h"
#include "modules/audio_coding/codecs/ilbc/encode.h"
#include "modules/audio_coding/codecs/ilbc/init_decode.h"
#include "modules/audio_coding/codecs/ilbc/init_encode.h"
#include "rtc_base/checks.h"
int16_t WebRtcIlbcfix_EncoderAssign(IlbcEncoderInstance** iLBC_encinst,
int16_t* ILBCENC_inst_Addr,
int16_t* size) {
*iLBC_encinst=(IlbcEncoderInstance*)ILBCENC_inst_Addr;
*size=sizeof(IlbcEncoder)/sizeof(int16_t);
if (*iLBC_encinst!=NULL) {
return(0);
} else {
return(-1);
}
}
int16_t WebRtcIlbcfix_DecoderAssign(IlbcDecoderInstance** iLBC_decinst,
int16_t* ILBCDEC_inst_Addr,
int16_t* size) {
*iLBC_decinst=(IlbcDecoderInstance*)ILBCDEC_inst_Addr;
*size=sizeof(IlbcDecoder)/sizeof(int16_t);
if (*iLBC_decinst!=NULL) {
return(0);
} else {
return(-1);
}
}
int16_t WebRtcIlbcfix_EncoderCreate(IlbcEncoderInstance **iLBC_encinst) {
*iLBC_encinst=(IlbcEncoderInstance*)malloc(sizeof(IlbcEncoder));
if (*iLBC_encinst!=NULL) {
return(0);
} else {
return(-1);
}
}
int16_t WebRtcIlbcfix_DecoderCreate(IlbcDecoderInstance **iLBC_decinst) {
*iLBC_decinst=(IlbcDecoderInstance*)malloc(sizeof(IlbcDecoder));
if (*iLBC_decinst!=NULL) {
return(0);
} else {
return(-1);
}
}
int16_t WebRtcIlbcfix_EncoderFree(IlbcEncoderInstance *iLBC_encinst) {
free(iLBC_encinst);
return(0);
}
int16_t WebRtcIlbcfix_DecoderFree(IlbcDecoderInstance *iLBC_decinst) {
free(iLBC_decinst);
return(0);
}
int16_t WebRtcIlbcfix_EncoderInit(IlbcEncoderInstance* iLBCenc_inst,
int16_t mode) {
if ((mode==20)||(mode==30)) {
WebRtcIlbcfix_InitEncode((IlbcEncoder*) iLBCenc_inst, mode);
return(0);
} else {
return(-1);
}
}
int WebRtcIlbcfix_Encode(IlbcEncoderInstance* iLBCenc_inst,
const int16_t* speechIn,
size_t len,
uint8_t* encoded) {
size_t pos = 0;
size_t encpos = 0;
if ((len != ((IlbcEncoder*)iLBCenc_inst)->blockl) &&
#ifdef SPLIT_10MS
(len != 80) &&
#endif
(len != 2*((IlbcEncoder*)iLBCenc_inst)->blockl) &&
(len != 3*((IlbcEncoder*)iLBCenc_inst)->blockl))
{
/* A maximum of 3 frames/packet is allowed */
return(-1);
} else {
/* call encoder */
while (pos<len) {
WebRtcIlbcfix_EncodeImpl((uint16_t*)&encoded[2 * encpos], &speechIn[pos],
(IlbcEncoder*)iLBCenc_inst);
#ifdef SPLIT_10MS
pos += 80;
if(((IlbcEncoder*)iLBCenc_inst)->section == 0)
#else
pos += ((IlbcEncoder*)iLBCenc_inst)->blockl;
#endif
encpos += ((IlbcEncoder*)iLBCenc_inst)->no_of_words;
}
return (int)(encpos*2);
}
}
int16_t WebRtcIlbcfix_DecoderInit(IlbcDecoderInstance* iLBCdec_inst,
int16_t mode) {
if ((mode==20)||(mode==30)) {
WebRtcIlbcfix_InitDecode((IlbcDecoder*) iLBCdec_inst, mode, 1);
return(0);
} else {
return(-1);
}
}
void WebRtcIlbcfix_DecoderInit20Ms(IlbcDecoderInstance* iLBCdec_inst) {
WebRtcIlbcfix_InitDecode((IlbcDecoder*) iLBCdec_inst, 20, 1);
}
void WebRtcIlbcfix_Decoderinit30Ms(IlbcDecoderInstance* iLBCdec_inst) {
WebRtcIlbcfix_InitDecode((IlbcDecoder*) iLBCdec_inst, 30, 1);
}
int WebRtcIlbcfix_Decode(IlbcDecoderInstance* iLBCdec_inst,
const uint8_t* encoded,
size_t len,
int16_t* decoded,
int16_t* speechType)
{
size_t i=0;
/* Allow for automatic switching between the frame sizes
(although you do get some discontinuity) */
if ((len==((IlbcDecoder*)iLBCdec_inst)->no_of_bytes)||
(len==2*((IlbcDecoder*)iLBCdec_inst)->no_of_bytes)||
(len==3*((IlbcDecoder*)iLBCdec_inst)->no_of_bytes)) {
/* ok, do nothing */
} else {
/* Test if the mode has changed */
if (((IlbcDecoder*)iLBCdec_inst)->mode==20) {
if ((len==NO_OF_BYTES_30MS)||
(len==2*NO_OF_BYTES_30MS)||
(len==3*NO_OF_BYTES_30MS)) {
WebRtcIlbcfix_InitDecode(
((IlbcDecoder*)iLBCdec_inst), 30,
((IlbcDecoder*)iLBCdec_inst)->use_enhancer);
} else {
/* Unsupported frame length */
return(-1);
}
} else {
if ((len==NO_OF_BYTES_20MS)||
(len==2*NO_OF_BYTES_20MS)||
(len==3*NO_OF_BYTES_20MS)) {
WebRtcIlbcfix_InitDecode(
((IlbcDecoder*)iLBCdec_inst), 20,
((IlbcDecoder*)iLBCdec_inst)->use_enhancer);
} else {
/* Unsupported frame length */
return(-1);
}
}
}
while ((i*((IlbcDecoder*)iLBCdec_inst)->no_of_bytes)<len) {
if (WebRtcIlbcfix_DecodeImpl(
&decoded[i * ((IlbcDecoder*)iLBCdec_inst)->blockl],
(const uint16_t*)&encoded
[2 * i * ((IlbcDecoder*)iLBCdec_inst)->no_of_words],
(IlbcDecoder*)iLBCdec_inst, 1) == -1)
return -1;
i++;
}
/* iLBC does not support VAD/CNG yet */
*speechType=1;
return (int)(i*((IlbcDecoder*)iLBCdec_inst)->blockl);
}
int WebRtcIlbcfix_Decode20Ms(IlbcDecoderInstance* iLBCdec_inst,
const uint8_t* encoded,
size_t len,
int16_t* decoded,
int16_t* speechType)
{
size_t i=0;
if ((len==((IlbcDecoder*)iLBCdec_inst)->no_of_bytes)||
(len==2*((IlbcDecoder*)iLBCdec_inst)->no_of_bytes)||
(len==3*((IlbcDecoder*)iLBCdec_inst)->no_of_bytes)) {
/* ok, do nothing */
} else {
return(-1);
}
while ((i*((IlbcDecoder*)iLBCdec_inst)->no_of_bytes)<len) {
if (!WebRtcIlbcfix_DecodeImpl(
&decoded[i * ((IlbcDecoder*)iLBCdec_inst)->blockl],
(const uint16_t*)&encoded
[2 * i * ((IlbcDecoder*)iLBCdec_inst)->no_of_words],
(IlbcDecoder*)iLBCdec_inst, 1))
return -1;
i++;
}
/* iLBC does not support VAD/CNG yet */
*speechType=1;
return (int)(i*((IlbcDecoder*)iLBCdec_inst)->blockl);
}
int WebRtcIlbcfix_Decode30Ms(IlbcDecoderInstance* iLBCdec_inst,
const uint8_t* encoded,
size_t len,
int16_t* decoded,
int16_t* speechType)
{
size_t i=0;
if ((len==((IlbcDecoder*)iLBCdec_inst)->no_of_bytes)||
(len==2*((IlbcDecoder*)iLBCdec_inst)->no_of_bytes)||
(len==3*((IlbcDecoder*)iLBCdec_inst)->no_of_bytes)) {
/* ok, do nothing */
} else {
return(-1);
}
while ((i*((IlbcDecoder*)iLBCdec_inst)->no_of_bytes)<len) {
if (!WebRtcIlbcfix_DecodeImpl(
&decoded[i * ((IlbcDecoder*)iLBCdec_inst)->blockl],
(const uint16_t*)&encoded
[2 * i * ((IlbcDecoder*)iLBCdec_inst)->no_of_words],
(IlbcDecoder*)iLBCdec_inst, 1))
return -1;
i++;
}
/* iLBC does not support VAD/CNG yet */
*speechType=1;
return (int)(i*((IlbcDecoder*)iLBCdec_inst)->blockl);
}
size_t WebRtcIlbcfix_DecodePlc(IlbcDecoderInstance* iLBCdec_inst,
int16_t* decoded,
size_t noOfLostFrames) {
size_t i;
uint16_t dummy;
for (i=0;i<noOfLostFrames;i++) {
// PLC decoding shouldn't fail, because there is no external input data
// that can be bad.
int result = WebRtcIlbcfix_DecodeImpl(
&decoded[i * ((IlbcDecoder*)iLBCdec_inst)->blockl], &dummy,
(IlbcDecoder*)iLBCdec_inst, 0);
RTC_CHECK_EQ(result, 0);
}
return (noOfLostFrames*((IlbcDecoder*)iLBCdec_inst)->blockl);
}
size_t WebRtcIlbcfix_NetEqPlc(IlbcDecoderInstance* iLBCdec_inst,
int16_t* decoded,
size_t noOfLostFrames) {
/* Two input parameters not used, but needed for function pointers in NetEQ */
(void)(decoded = NULL);
(void)(noOfLostFrames = 0);
WebRtcSpl_MemSetW16(((IlbcDecoder*)iLBCdec_inst)->enh_buf, 0, ENH_BUFL);
((IlbcDecoder*)iLBCdec_inst)->prev_enh_pl = 2;
return (0);
}
void WebRtcIlbcfix_version(char *version)
{
strcpy((char*)version, "1.1.1");
}

251
modules/audio_coding/codecs/ilbc/ilbc.h
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@ -1,251 +0,0 @@
/*
* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/*
* ilbc.h
*
* This header file contains all of the API's for iLBC.
*
*/
#ifndef MODULES_AUDIO_CODING_CODECS_ILBC_ILBC_H_
#define MODULES_AUDIO_CODING_CODECS_ILBC_ILBC_H_
#include <stddef.h>
#include <stdint.h>
/*
* Solution to support multiple instances
* Customer has to cast instance to proper type
*/
typedef struct iLBC_encinst_t_ IlbcEncoderInstance;
typedef struct iLBC_decinst_t_ IlbcDecoderInstance;
/*
* Comfort noise constants
*/
#define ILBC_SPEECH 1
#define ILBC_CNG 2
#ifdef __cplusplus
extern "C" {
#endif
/****************************************************************************
* WebRtcIlbcfix_XxxAssign(...)
*
* These functions assigns the encoder/decoder instance to the specified
* memory location
*
* Input:
* - XXX_xxxinst : Pointer to created instance that should be
* assigned
* - ILBCXXX_inst_Addr : Pointer to the desired memory space
* - size : The size that this structure occupies (in Word16)
*
* Return value : 0 - Ok
* -1 - Error
*/
int16_t WebRtcIlbcfix_EncoderAssign(IlbcEncoderInstance** iLBC_encinst,
int16_t* ILBCENC_inst_Addr,
int16_t* size);
int16_t WebRtcIlbcfix_DecoderAssign(IlbcDecoderInstance** iLBC_decinst,
int16_t* ILBCDEC_inst_Addr,
int16_t* size);
/****************************************************************************
* WebRtcIlbcfix_XxxAssign(...)
*
* These functions create a instance to the specified structure
*
* Input:
* - XXX_inst : Pointer to created instance that should be created
*
* Return value : 0 - Ok
* -1 - Error
*/
int16_t WebRtcIlbcfix_EncoderCreate(IlbcEncoderInstance** iLBC_encinst);
int16_t WebRtcIlbcfix_DecoderCreate(IlbcDecoderInstance** iLBC_decinst);
/****************************************************************************
* WebRtcIlbcfix_XxxFree(...)
*
* These functions frees the dynamic memory of a specified instance
*
* Input:
* - XXX_inst : Pointer to created instance that should be freed
*
* Return value : 0 - Ok
* -1 - Error
*/
int16_t WebRtcIlbcfix_EncoderFree(IlbcEncoderInstance* iLBC_encinst);
int16_t WebRtcIlbcfix_DecoderFree(IlbcDecoderInstance* iLBC_decinst);
/****************************************************************************
* WebRtcIlbcfix_EncoderInit(...)
*
* This function initializes a iLBC instance
*
* Input:
* - iLBCenc_inst : iLBC instance, i.e. the user that should receive
* be initialized
* - frameLen : The frame length of the codec 20/30 (ms)
*
* Return value : 0 - Ok
* -1 - Error
*/
int16_t WebRtcIlbcfix_EncoderInit(IlbcEncoderInstance* iLBCenc_inst,
int16_t frameLen);
/****************************************************************************
* WebRtcIlbcfix_Encode(...)
*
* This function encodes one iLBC frame. Input speech length has be a
* multiple of the frame length.
*
* Input:
* - iLBCenc_inst : iLBC instance, i.e. the user that should encode
* a package
* - speechIn : Input speech vector
* - len : Samples in speechIn (160, 240, 320 or 480)
*
* Output:
* - encoded : The encoded data vector
*
* Return value : >0 - Length (in bytes) of coded data
* -1 - Error
*/
int WebRtcIlbcfix_Encode(IlbcEncoderInstance* iLBCenc_inst,
const int16_t* speechIn,
size_t len,
uint8_t* encoded);
/****************************************************************************
* WebRtcIlbcfix_DecoderInit(...)
*
* This function initializes a iLBC instance with either 20 or 30 ms frames
* Alternatively the WebRtcIlbcfix_DecoderInit_XXms can be used. Then it's
* not needed to specify the frame length with a variable.
*
* Input:
* - IlbcDecoderInstance : iLBC decoder instance
* - frameLen : The frame length of the codec 20/30 (ms)
*
* Return value : 0 - Ok
* -1 - Error
*/
int16_t WebRtcIlbcfix_DecoderInit(IlbcDecoderInstance* iLBCdec_inst,
int16_t frameLen);
void WebRtcIlbcfix_DecoderInit20Ms(IlbcDecoderInstance* iLBCdec_inst);
void WebRtcIlbcfix_Decoderinit30Ms(IlbcDecoderInstance* iLBCdec_inst);
/****************************************************************************
* WebRtcIlbcfix_Decode(...)
*
* This function decodes a packet with iLBC frame(s). Output speech length
* will be a multiple of 160 or 240 samples ((160 or 240)*frames/packet).
*
* Input:
* - iLBCdec_inst : iLBC instance, i.e. the user that should decode
* a packet
* - encoded : Encoded iLBC frame(s)
* - len : Bytes in encoded vector
*
* Output:
* - decoded : The decoded vector
* - speechType : 1 normal, 2 CNG
*
* Return value : >0 - Samples in decoded vector
* -1 - Error
*/
int WebRtcIlbcfix_Decode(IlbcDecoderInstance* iLBCdec_inst,
const uint8_t* encoded,
size_t len,
int16_t* decoded,
int16_t* speechType);
int WebRtcIlbcfix_Decode20Ms(IlbcDecoderInstance* iLBCdec_inst,
const uint8_t* encoded,
size_t len,
int16_t* decoded,
int16_t* speechType);
int WebRtcIlbcfix_Decode30Ms(IlbcDecoderInstance* iLBCdec_inst,
const uint8_t* encoded,
size_t len,
int16_t* decoded,
int16_t* speechType);
/****************************************************************************
* WebRtcIlbcfix_DecodePlc(...)
*
* This function conducts PLC for iLBC frame(s). Output speech length
* will be a multiple of 160 or 240 samples.
*
* Input:
* - iLBCdec_inst : iLBC instance, i.e. the user that should perform
* a PLC
* - noOfLostFrames : Number of PLC frames to produce
*
* Output:
* - decoded : The "decoded" vector
*
* Return value : Samples in decoded PLC vector
*/
size_t WebRtcIlbcfix_DecodePlc(IlbcDecoderInstance* iLBCdec_inst,
int16_t* decoded,
size_t noOfLostFrames);
/****************************************************************************
* WebRtcIlbcfix_NetEqPlc(...)
*
* This function updates the decoder when a packet loss has occured, but it
* does not produce any PLC data. Function can be used if another PLC method
* is used (i.e NetEq).
*
* Input:
* - iLBCdec_inst : iLBC instance that should be updated
* - noOfLostFrames : Number of lost frames
*
* Output:
* - decoded : The "decoded" vector (nothing in this case)
*
* Return value : Samples in decoded PLC vector
*/
size_t WebRtcIlbcfix_NetEqPlc(IlbcDecoderInstance* iLBCdec_inst,
int16_t* decoded,
size_t noOfLostFrames);
/****************************************************************************
* WebRtcIlbcfix_version(...)
*
* This function returns the version number of iLBC
*
* Output:
* - version : Version number of iLBC (maximum 20 char)
*/
void WebRtcIlbcfix_version(char* version);
#ifdef __cplusplus
}
#endif
#endif // MODULES_AUDIO_CODING_CODECS_ILBC_ILBC_H_

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modules/audio_coding/codecs/ilbc/ilbc_unittest.cc
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/*
* Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "modules/audio_coding/codecs/ilbc/audio_decoder_ilbc.h"
#include "modules/audio_coding/codecs/ilbc/audio_encoder_ilbc.h"
#include "modules/audio_coding/codecs/legacy_encoded_audio_frame.h"
#include "test/gtest.h"
namespace webrtc {
// TODO(bugs.webrtc.org/345525069): Either fix/enable or remove iLBC.
#if defined(__has_feature) && __has_feature(undefined_behavior_sanitizer)
TEST(IlbcTest, DISABLED_BadPacket) {
#else
TEST(IlbcTest, BadPacket) {
#endif
// Get a good packet.
AudioEncoderIlbcConfig config;
config.frame_size_ms = 20; // We need 20 ms rather than the default 30 ms;
// otherwise, all possible values of cb_index[2]
// are valid.
AudioEncoderIlbcImpl encoder(config, 102);
std::vector<int16_t> samples(encoder.SampleRateHz() / 100, 4711);
rtc::Buffer packet;
int num_10ms_chunks = 0;
while (packet.size() == 0) {
encoder.Encode(0, samples, &packet);
num_10ms_chunks += 1;
}
// Break the packet by setting all bits of the unsigned 7-bit number
// cb_index[2] to 1, giving it a value of 127. For a 20 ms packet, this is
// too large.
EXPECT_EQ(38u, packet.size());
rtc::Buffer bad_packet(packet.data(), packet.size());
bad_packet[29] |= 0x3f; // Bits 1-6.
bad_packet[30] |= 0x80; // Bit 0.
// Decode the bad packet. We expect the decoder to respond by returning -1.
AudioDecoderIlbcImpl decoder;
std::vector<int16_t> decoded_samples(num_10ms_chunks * samples.size());
AudioDecoder::SpeechType speech_type;
EXPECT_EQ(-1, decoder.Decode(bad_packet.data(), bad_packet.size(),
encoder.SampleRateHz(),
sizeof(int16_t) * decoded_samples.size(),
decoded_samples.data(), &speech_type));
// Decode the good packet. This should work, because the failed decoding
// should not have left the decoder in a broken state.
EXPECT_EQ(static_cast<int>(decoded_samples.size()),
decoder.Decode(packet.data(), packet.size(), encoder.SampleRateHz(),
sizeof(int16_t) * decoded_samples.size(),
decoded_samples.data(), &speech_type));
}
class SplitIlbcTest : public ::testing::TestWithParam<std::pair<int, int> > {
protected:
virtual void SetUp() {
const std::pair<int, int> parameters = GetParam();
num_frames_ = parameters.first;
frame_length_ms_ = parameters.second;
frame_length_bytes_ = (frame_length_ms_ == 20) ? 38 : 50;
}
size_t num_frames_;
int frame_length_ms_;
size_t frame_length_bytes_;
};
TEST_P(SplitIlbcTest, NumFrames) {
AudioDecoderIlbcImpl decoder;
const size_t frame_length_samples = frame_length_ms_ * 8;
const auto generate_payload = [](size_t payload_length_bytes) {
rtc::Buffer payload(payload_length_bytes);
// Fill payload with increasing integers {0, 1, 2, ...}.
for (size_t i = 0; i < payload.size(); ++i) {
payload[i] = static_cast<uint8_t>(i);
}
return payload;
};
const auto results = decoder.ParsePayload(
generate_payload(frame_length_bytes_ * num_frames_), 0);
EXPECT_EQ(num_frames_, results.size());
size_t frame_num = 0;
uint8_t payload_value = 0;
for (const auto& result : results) {
EXPECT_EQ(frame_length_samples * frame_num, result.timestamp);
const LegacyEncodedAudioFrame* frame =
static_cast<const LegacyEncodedAudioFrame*>(result.frame.get());
const rtc::Buffer& payload = frame->payload();
EXPECT_EQ(frame_length_bytes_, payload.size());
for (size_t i = 0; i < payload.size(); ++i, ++payload_value) {
EXPECT_EQ(payload_value, payload[i]);
}
++frame_num;
}
}
// Test 1 through 5 frames of 20 and 30 ms size.
// Also test the maximum number of frames in one packet for 20 and 30 ms.
// The maximum is defined by the largest payload length that can be uniquely
// resolved to a frame size of either 38 bytes (20 ms) or 50 bytes (30 ms).
INSTANTIATE_TEST_SUITE_P(
IlbcTest,
SplitIlbcTest,
::testing::Values(std::pair<int, int>(1, 20), // 1 frame, 20 ms.
std::pair<int, int>(2, 20), // 2 frames, 20 ms.
std::pair<int, int>(3, 20), // And so on.
std::pair<int, int>(4, 20),
std::pair<int, int>(5, 20),
std::pair<int, int>(24, 20),
std::pair<int, int>(1, 30),
std::pair<int, int>(2, 30),
std::pair<int, int>(3, 30),
std::pair<int, int>(4, 30),
std::pair<int, int>(5, 30),
std::pair<int, int>(18, 30)));
// Test too large payload size.
TEST(IlbcTest, SplitTooLargePayload) {
AudioDecoderIlbcImpl decoder;
constexpr size_t kPayloadLengthBytes = 950;
const auto results =
decoder.ParsePayload(rtc::Buffer(kPayloadLengthBytes), 0);
EXPECT_TRUE(results.empty());
}
// Payload not an integer number of frames.
TEST(IlbcTest, SplitUnevenPayload) {
AudioDecoderIlbcImpl decoder;
constexpr size_t kPayloadLengthBytes = 39; // Not an even number of frames.
const auto results =
decoder.ParsePayload(rtc::Buffer(kPayloadLengthBytes), 0);
EXPECT_TRUE(results.empty());
}
} // namespace webrtc

40
modules/audio_coding/codecs/ilbc/index_conv_dec.c
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_IndexConvDec.c
******************************************************************/
#include "modules/audio_coding/codecs/ilbc/index_conv_dec.h"
#include "modules/audio_coding/codecs/ilbc/defines.h"
void WebRtcIlbcfix_IndexConvDec(
int16_t *index /* (i/o) Codebook indexes */
){
int k;
for (k=4;k<6;k++) {
/* Readjust the second and third codebook index for the first 40 sample
so that they look the same as the first (in terms of lag)
*/
if ((index[k]>=44)&&(index[k]<108)) {
index[k]+=64;
} else if ((index[k]>=108)&&(index[k]<128)) {
index[k]+=128;
} else {
/* ERROR */
}
}
}

27
modules/audio_coding/codecs/ilbc/index_conv_dec.h
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_IndexConvDec.h
******************************************************************/
#ifndef MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_INDEX_CONV_DEC_H_
#define MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_INDEX_CONV_DEC_H_
#include "modules/audio_coding/codecs/ilbc/defines.h"
void WebRtcIlbcfix_IndexConvDec(int16_t* index /* (i/o) Codebook indexes */
);
#endif

45
modules/audio_coding/codecs/ilbc/index_conv_enc.c
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
IiLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_IndexConvEnc.c
******************************************************************/
#include "modules/audio_coding/codecs/ilbc/index_conv_enc.h"
#include "modules/audio_coding/codecs/ilbc/defines.h"
/*----------------------------------------------------------------*
* Convert the codebook indexes to make the search easier
*---------------------------------------------------------------*/
void WebRtcIlbcfix_IndexConvEnc(
int16_t *index /* (i/o) Codebook indexes */
){
int k;
for (k=4;k<6;k++) {
/* Readjust the second and third codebook index so that it is
packetized into 7 bits (before it was put in lag-wise the same
way as for the first codebook which uses 8 bits)
*/
if ((index[k]>=108)&&(index[k]<172)) {
index[k]-=64;
} else if (index[k]>=236) {
index[k]-=128;
} else {
/* ERROR */
}
}
}

31
modules/audio_coding/codecs/ilbc/index_conv_enc.h
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_IndexConvEnc.h
******************************************************************/
#ifndef MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_INDEX_CONV_ENC_H_
#define MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_INDEX_CONV_ENC_H_
#include <stdint.h>
/*----------------------------------------------------------------*
* Convert the codebook indexes to make the search easier
*---------------------------------------------------------------*/
void WebRtcIlbcfix_IndexConvEnc(int16_t* index /* (i/o) Codebook indexes */
);
#endif

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modules/audio_coding/codecs/ilbc/init_decode.c
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_InitDecode.c
******************************************************************/
#include "modules/audio_coding/codecs/ilbc/init_decode.h"
#include "modules/audio_coding/codecs/ilbc/constants.h"
#include "modules/audio_coding/codecs/ilbc/defines.h"
/*----------------------------------------------------------------*
* Initiation of decoder instance.
*---------------------------------------------------------------*/
int WebRtcIlbcfix_InitDecode( /* (o) Number of decoded samples */
IlbcDecoder *iLBCdec_inst, /* (i/o) Decoder instance */
int16_t mode, /* (i) frame size mode */
int use_enhancer) { /* (i) 1: use enhancer, 0: no enhancer */
int i;
iLBCdec_inst->mode = mode;
/* Set all the variables that are dependent on the frame size mode */
if (mode==30) {
iLBCdec_inst->blockl = BLOCKL_30MS;
iLBCdec_inst->nsub = NSUB_30MS;
iLBCdec_inst->nasub = NASUB_30MS;
iLBCdec_inst->lpc_n = LPC_N_30MS;
iLBCdec_inst->no_of_bytes = NO_OF_BYTES_30MS;
iLBCdec_inst->no_of_words = NO_OF_WORDS_30MS;
iLBCdec_inst->state_short_len=STATE_SHORT_LEN_30MS;
}
else if (mode==20) {
iLBCdec_inst->blockl = BLOCKL_20MS;
iLBCdec_inst->nsub = NSUB_20MS;
iLBCdec_inst->nasub = NASUB_20MS;
iLBCdec_inst->lpc_n = LPC_N_20MS;
iLBCdec_inst->no_of_bytes = NO_OF_BYTES_20MS;
iLBCdec_inst->no_of_words = NO_OF_WORDS_20MS;
iLBCdec_inst->state_short_len=STATE_SHORT_LEN_20MS;
}
else {
return(-1);
}
/* Reset all the previous LSF to mean LSF */
WEBRTC_SPL_MEMCPY_W16(iLBCdec_inst->lsfdeqold, WebRtcIlbcfix_kLsfMean, LPC_FILTERORDER);
/* Clear the synthesis filter memory */
WebRtcSpl_MemSetW16(iLBCdec_inst->syntMem, 0, LPC_FILTERORDER);
/* Set the old synthesis filter to {1.0 0.0 ... 0.0} */
WebRtcSpl_MemSetW16(iLBCdec_inst->old_syntdenum, 0, ((LPC_FILTERORDER + 1)*NSUB_MAX));
for (i=0; i<NSUB_MAX; i++) {
iLBCdec_inst->old_syntdenum[i*(LPC_FILTERORDER+1)] = 4096;
}
/* Clear the variables that are used for the PLC */
iLBCdec_inst->last_lag = 20;
iLBCdec_inst->consPLICount = 0;
iLBCdec_inst->prevPLI = 0;
iLBCdec_inst->perSquare = 0;
iLBCdec_inst->prevLag = 120;
iLBCdec_inst->prevLpc[0] = 4096;
WebRtcSpl_MemSetW16(iLBCdec_inst->prevLpc+1, 0, LPC_FILTERORDER);
WebRtcSpl_MemSetW16(iLBCdec_inst->prevResidual, 0, BLOCKL_MAX);
/* Initialize the seed for the random number generator */
iLBCdec_inst->seed = 777;
/* Set the filter state of the HP filter to 0 */
WebRtcSpl_MemSetW16(iLBCdec_inst->hpimemx, 0, 2);
WebRtcSpl_MemSetW16(iLBCdec_inst->hpimemy, 0, 4);
/* Set the variables that are used in the ehnahcer */
iLBCdec_inst->use_enhancer = use_enhancer;
WebRtcSpl_MemSetW16(iLBCdec_inst->enh_buf, 0, (ENH_BUFL+ENH_BUFL_FILTEROVERHEAD));
for (i=0;i<ENH_NBLOCKS_TOT;i++) {
iLBCdec_inst->enh_period[i]=160; /* Q(-4) */
}
iLBCdec_inst->prev_enh_pl = 0;
return (int)(iLBCdec_inst->blockl);
}

38
modules/audio_coding/codecs/ilbc/init_decode.h
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_InitDecode.h
******************************************************************/
#ifndef MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_INIT_DECODE_H_
#define MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_INIT_DECODE_H_
#include <stdint.h>
#include "modules/audio_coding/codecs/ilbc/defines.h"
/*----------------------------------------------------------------*
* Initiation of decoder instance.
*---------------------------------------------------------------*/
int WebRtcIlbcfix_InitDecode(/* (o) Number of decoded samples */
IlbcDecoder*
iLBCdec_inst, /* (i/o) Decoder instance */
int16_t mode, /* (i) frame size mode */
int use_enhancer /* (i) 1 to use enhancer
0 to run without enhancer */
);
#endif

73
modules/audio_coding/codecs/ilbc/init_encode.c
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_InitEncode.c
******************************************************************/
#include "modules/audio_coding/codecs/ilbc/init_encode.h"
#include "modules/audio_coding/codecs/ilbc/constants.h"
#include "modules/audio_coding/codecs/ilbc/defines.h"
/*----------------------------------------------------------------*
* Initiation of encoder instance.
*---------------------------------------------------------------*/
int WebRtcIlbcfix_InitEncode( /* (o) Number of bytes encoded */
IlbcEncoder *iLBCenc_inst, /* (i/o) Encoder instance */
int16_t mode) { /* (i) frame size mode */
iLBCenc_inst->mode = mode;
/* Set all the variables that are dependent on the frame size mode */
if (mode==30) {
iLBCenc_inst->blockl = BLOCKL_30MS;
iLBCenc_inst->nsub = NSUB_30MS;
iLBCenc_inst->nasub = NASUB_30MS;
iLBCenc_inst->lpc_n = LPC_N_30MS;
iLBCenc_inst->no_of_bytes = NO_OF_BYTES_30MS;
iLBCenc_inst->no_of_words = NO_OF_WORDS_30MS;
iLBCenc_inst->state_short_len=STATE_SHORT_LEN_30MS;
}
else if (mode==20) {
iLBCenc_inst->blockl = BLOCKL_20MS;
iLBCenc_inst->nsub = NSUB_20MS;
iLBCenc_inst->nasub = NASUB_20MS;
iLBCenc_inst->lpc_n = LPC_N_20MS;
iLBCenc_inst->no_of_bytes = NO_OF_BYTES_20MS;
iLBCenc_inst->no_of_words = NO_OF_WORDS_20MS;
iLBCenc_inst->state_short_len=STATE_SHORT_LEN_20MS;
}
else {
return(-1);
}
/* Clear the buffers and set the previous LSF and LSP to the mean value */
WebRtcSpl_MemSetW16(iLBCenc_inst->anaMem, 0, LPC_FILTERORDER);
WEBRTC_SPL_MEMCPY_W16(iLBCenc_inst->lsfold, WebRtcIlbcfix_kLsfMean, LPC_FILTERORDER);
WEBRTC_SPL_MEMCPY_W16(iLBCenc_inst->lsfdeqold, WebRtcIlbcfix_kLsfMean, LPC_FILTERORDER);
WebRtcSpl_MemSetW16(iLBCenc_inst->lpc_buffer, 0, LPC_LOOKBACK + BLOCKL_MAX);
/* Set the filter state of the HP filter to 0 */
WebRtcSpl_MemSetW16(iLBCenc_inst->hpimemx, 0, 2);
WebRtcSpl_MemSetW16(iLBCenc_inst->hpimemy, 0, 4);
#ifdef SPLIT_10MS
/*Zeroing the past samples for 10msec Split*/
WebRtcSpl_MemSetW16(iLBCenc_inst->past_samples,0,160);
iLBCenc_inst->section = 0;
#endif
return (int)(iLBCenc_inst->no_of_bytes);
}

36
modules/audio_coding/codecs/ilbc/init_encode.h
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_InitEncode.h
******************************************************************/
#ifndef MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_INIT_ENCODE_H_
#define MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_INIT_ENCODE_H_
#include <stdint.h>
#include "modules/audio_coding/codecs/ilbc/defines.h"
/*----------------------------------------------------------------*
* Initiation of encoder instance.
*---------------------------------------------------------------*/
int WebRtcIlbcfix_InitEncode(/* (o) Number of bytes encoded */
IlbcEncoder*
iLBCenc_inst, /* (i/o) Encoder instance */
int16_t mode /* (i) frame size mode */
);
#endif

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modules/audio_coding/codecs/ilbc/interpolate.c
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_Interpolate.c
******************************************************************/
#include "modules/audio_coding/codecs/ilbc/interpolate.h"
#include "modules/audio_coding/codecs/ilbc/constants.h"
#include "modules/audio_coding/codecs/ilbc/defines.h"
/*----------------------------------------------------------------*
* interpolation between vectors
*---------------------------------------------------------------*/
void WebRtcIlbcfix_Interpolate(
int16_t *out, /* (o) output vector */
int16_t *in1, /* (i) first input vector */
int16_t *in2, /* (i) second input vector */
int16_t coef, /* (i) weight coefficient in Q14 */
int16_t length) /* (i) number of sample is vectors */
{
int i;
int16_t invcoef;
/*
Performs the operation out[i] = in[i]*coef + (1-coef)*in2[i] (with rounding)
*/
invcoef = 16384 - coef; /* 16384 = 1.0 (Q14)*/
for (i = 0; i < length; i++) {
out[i] = (int16_t)((coef * in1[i] + invcoef * in2[i] + 8192) >> 14);
}
return;
}

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modules/audio_coding/codecs/ilbc/interpolate.h
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_Interpolate.h
******************************************************************/
#ifndef MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_INTERPOLATE_H_
#define MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_INTERPOLATE_H_
#include <stdint.h>
/*----------------------------------------------------------------*
* interpolation between vectors
*---------------------------------------------------------------*/
void WebRtcIlbcfix_Interpolate(
int16_t* out, /* (o) output vector */
int16_t* in1, /* (i) first input vector */
int16_t* in2, /* (i) second input vector */
int16_t coef, /* (i) weight coefficient in Q14 */
int16_t length); /* (i) number of sample is vectors */
#endif

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modules/audio_coding/codecs/ilbc/interpolate_samples.c
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/******************************************************************
iLBC Speech Coder ANSI-C Source Code
WebRtcIlbcfix_InterpolateSamples.c
******************************************************************/
#include "modules/audio_coding/codecs/ilbc/interpolate_samples.h"
#include "modules/audio_coding/codecs/ilbc/constants.h"
#include "modules/audio_coding/codecs/ilbc/defines.h"
void WebRtcIlbcfix_InterpolateSamples(
int16_t *interpSamples, /* (o) The interpolated samples */
int16_t *CBmem, /* (i) The CB memory */
size_t lMem /* (i) Length of the CB memory */
) {
int16_t *ppi, *ppo, i, j, temp1, temp2;
int16_t *tmpPtr;
/* Calculate the 20 vectors of interpolated samples (4 samples each)
that are used in the codebooks for lag 20 to 39 */
tmpPtr = interpSamples;
for (j=0; j<20; j++) {
temp1 = 0;
temp2 = 3;
ppo = CBmem+lMem-4;
ppi = CBmem+lMem-j-24;
for (i=0; i<4; i++) {
*tmpPtr++ = (int16_t)((WebRtcIlbcfix_kAlpha[temp2] * *ppo) >> 15) +
(int16_t)((WebRtcIlbcfix_kAlpha[temp1] * *ppi) >> 15);
ppo++;
ppi++;
temp1++;
temp2--;
}
}
return;
}

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