a750333372
Also put Baseline profile in front of Constrained Baseline profile. The reason is that the HW encoders are mostly BP, and we want this to be the first codec in the list so that HW is preferred by default. The H264 tests in chromium needs to be updated again with this change, which was changed here: https://codereview.chromium.org/2985263002/. Bug: webrtc:8317 Change-Id: Ief75683962b79b6664143d73b9259729c66ce082 Reviewed-on: https://webrtc-review.googlesource.com/17780 Reviewed-by: Rasmus Brandt <brandtr@webrtc.org> Commit-Queue: Magnus Jedvert <magjed@webrtc.org> Cr-Commit-Position: refs/heads/master@{#20554}
106 lines
3.1 KiB
C++
106 lines
3.1 KiB
C++
/*
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* Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*
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*/
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#include "modules/video_coding/codecs/h264/include/h264.h"
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#include "api/video_codecs/sdp_video_format.h"
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#include "media/base/h264_profile_level_id.h"
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#if defined(WEBRTC_USE_H264)
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#include "modules/video_coding/codecs/h264/h264_decoder_impl.h"
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#include "modules/video_coding/codecs/h264/h264_encoder_impl.h"
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#endif
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#include "rtc_base/checks.h"
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#include "rtc_base/logging.h"
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namespace webrtc {
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namespace {
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#if defined(WEBRTC_USE_H264)
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bool g_rtc_use_h264 = true;
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#endif
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// If H.264 OpenH264/FFmpeg codec is supported.
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bool IsH264CodecSupported() {
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#if defined(WEBRTC_USE_H264)
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return g_rtc_use_h264;
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#else
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return false;
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#endif
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}
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SdpVideoFormat CreateH264Format(H264::Profile profile, H264::Level level) {
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const rtc::Optional<std::string> profile_string =
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H264::ProfileLevelIdToString(H264::ProfileLevelId(profile, level));
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RTC_CHECK(profile_string);
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return SdpVideoFormat(cricket::kH264CodecName,
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{{cricket::kH264FmtpProfileLevelId, *profile_string},
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{cricket::kH264FmtpLevelAsymmetryAllowed, "1"},
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{cricket::kH264FmtpPacketizationMode, "1"}});
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}
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} // namespace
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void DisableRtcUseH264() {
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#if defined(WEBRTC_USE_H264)
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g_rtc_use_h264 = false;
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#endif
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}
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std::vector<SdpVideoFormat> SupportedH264Codecs() {
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if (!IsH264CodecSupported())
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return std::vector<SdpVideoFormat>();
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// We only support encoding Constrained Baseline Profile (CBP), but the
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// decoder supports more profiles. We can list all profiles here that are
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// supported by the decoder and that are also supersets of CBP, i.e. the
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// decoder for that profile is required to be able to decode CBP. This means
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// we can encode and send CBP even though we negotiated a potentially
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// higher profile. See the H264 spec for more information.
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return {CreateH264Format(H264::kProfileBaseline, H264::kLevel3_1),
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CreateH264Format(H264::kProfileConstrainedBaseline, H264::kLevel3_1)};
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}
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H264Encoder* H264Encoder::Create(const cricket::VideoCodec& codec) {
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RTC_DCHECK(H264Encoder::IsSupported());
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#if defined(WEBRTC_USE_H264)
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RTC_CHECK(g_rtc_use_h264);
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LOG(LS_INFO) << "Creating H264EncoderImpl.";
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return new H264EncoderImpl(codec);
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#else
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RTC_NOTREACHED();
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return nullptr;
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#endif
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}
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bool H264Encoder::IsSupported() {
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return IsH264CodecSupported();
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}
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H264Decoder* H264Decoder::Create() {
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RTC_DCHECK(H264Decoder::IsSupported());
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#if defined(WEBRTC_USE_H264)
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RTC_CHECK(g_rtc_use_h264);
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LOG(LS_INFO) << "Creating H264DecoderImpl.";
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return new H264DecoderImpl();
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#else
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RTC_NOTREACHED();
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return nullptr;
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#endif
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}
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bool H264Decoder::IsSupported() {
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return IsH264CodecSupported();
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}
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} // namespace webrtc
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