3ec96df907
split domain and only implements floating point operations (to avoid spectral leakage issues and unnecessary complexity). The goal of this CL is adding the new sub-module into APM without providing an implementation that could replace the existing gain control modules. The focus is in fact on initialization, reset, and configuration of AGC2. The module itself only applies a hard-coded gain value. This behavior will change in the coming CLs. BUG=webrtc:7494 Review-Url: https://codereview.webrtc.org/2848593002 Cr-Commit-Position: refs/heads/master@{#18222}
57 lines
1.7 KiB
C++
57 lines
1.7 KiB
C++
/*
|
|
* 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 WEBRTC_MODULES_AUDIO_PROCESSING_AGC2_GAIN_CONTROLLER2_H_
|
|
#define WEBRTC_MODULES_AUDIO_PROCESSING_AGC2_GAIN_CONTROLLER2_H_
|
|
|
|
#include <memory>
|
|
#include <string>
|
|
|
|
#include "webrtc/base/constructormagic.h"
|
|
#include "webrtc/modules/audio_processing/include/audio_processing.h"
|
|
#include "webrtc/modules/audio_processing/agc2/digital_gain_applier.h"
|
|
|
|
namespace webrtc {
|
|
|
|
class ApmDataDumper;
|
|
class AudioBuffer;
|
|
|
|
// Gain Controller 2 aims to automatically adjust levels by acting on the
|
|
// microphone gain and/or applying digital gain.
|
|
//
|
|
// It temporarily implements a hard-coded gain mode only.
|
|
class GainController2 {
|
|
public:
|
|
explicit GainController2(int sample_rate_hz);
|
|
~GainController2();
|
|
|
|
int sample_rate_hz() { return sample_rate_hz_; }
|
|
|
|
void Process(AudioBuffer* audio);
|
|
|
|
static bool Validate(const AudioProcessing::Config::GainController2& config);
|
|
static std::string ToString(
|
|
const AudioProcessing::Config::GainController2& config);
|
|
|
|
private:
|
|
int sample_rate_hz_;
|
|
std::unique_ptr<ApmDataDumper> data_dumper_;
|
|
DigitalGainApplier digital_gain_applier_;
|
|
static int instance_count_;
|
|
// TODO(alessiob): Remove once a meaningful gain controller mode is
|
|
// implemented.
|
|
const float gain_;
|
|
RTC_DISALLOW_COPY_AND_ASSIGN(GainController2);
|
|
};
|
|
|
|
} // namespace webrtc
|
|
|
|
#endif // WEBRTC_MODULES_AUDIO_PROCESSING_AGC2_GAIN_CONTROLLER2_H_
|