2c8c8e26fc
TBR=stefan@webrtc.org Bug: webrtc:7925 Change-Id: I0bb97acdf0d58a9ce531ecdd672bb17ef96360df Reviewed-on: https://webrtc-review.googlesource.com/21162 Commit-Queue: Magnus Jedvert <magjed@webrtc.org> Reviewed-by: Anders Carlsson <andersc@webrtc.org> Reviewed-by: Rasmus Brandt <brandtr@webrtc.org> Cr-Commit-Position: refs/heads/master@{#20717}
89 lines
3.2 KiB
C++
89 lines
3.2 KiB
C++
/*
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* Copyright (c) 2016 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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#include "media/engine/internalencoderfactory.h"
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#include <utility>
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#include "modules/video_coding/codecs/h264/include/h264.h"
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#include "modules/video_coding/codecs/vp8/include/vp8.h"
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#include "modules/video_coding/codecs/vp9/include/vp9.h"
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#include "rtc_base/logging.h"
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#include "system_wrappers/include/field_trial.h"
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namespace webrtc {
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namespace {
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// If this field trial is enabled, the "flexfec-03" codec will be advertised
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// as being supported by the InternalEncoderFactory. This means that
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// "flexfec-03" will appear in the default SDP offer, and we therefore need to
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// be ready to receive FlexFEC packets from the remote. It also means that
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// FlexFEC SSRCs will be generated by MediaSession and added as "a=ssrc:" and
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// "a=ssrc-group:" lines in the local SDP.
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bool IsFlexfecAdvertisedFieldTrialEnabled() {
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return webrtc::field_trial::IsEnabled("WebRTC-FlexFEC-03-Advertised");
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}
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} // namespace
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std::vector<SdpVideoFormat> InternalEncoderFactory::GetSupportedFormats()
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const {
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std::vector<SdpVideoFormat> supported_codecs;
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supported_codecs.push_back(SdpVideoFormat(cricket::kVp8CodecName));
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if (webrtc::VP9Encoder::IsSupported())
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supported_codecs.push_back(SdpVideoFormat(cricket::kVp9CodecName));
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for (const webrtc::SdpVideoFormat& format : webrtc::SupportedH264Codecs())
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supported_codecs.push_back(format);
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supported_codecs.push_back(SdpVideoFormat(cricket::kRedCodecName));
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supported_codecs.push_back(SdpVideoFormat(cricket::kUlpfecCodecName));
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if (IsFlexfecAdvertisedFieldTrialEnabled()) {
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// This value is currently arbitrarily set to 10 seconds. (The unit
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// is microseconds.) This parameter MUST be present in the SDP, but
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// we never use the actual value anywhere in our code however.
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// TODO(brandtr): Consider honouring this value in the sender and receiver.
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SdpVideoFormat::Parameters params = {
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{cricket::kFlexfecFmtpRepairWindow, "10000000"}};
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supported_codecs.push_back(
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SdpVideoFormat(cricket::kFlexfecCodecName, params));
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}
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return supported_codecs;
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}
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VideoEncoderFactory::CodecInfo InternalEncoderFactory::QueryVideoEncoder(
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const SdpVideoFormat& format) const {
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CodecInfo info;
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info.is_hardware_accelerated = false;
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info.has_internal_source = false;
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return info;
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}
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std::unique_ptr<VideoEncoder> InternalEncoderFactory::CreateVideoEncoder(
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const SdpVideoFormat& format) {
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if (cricket::CodecNamesEq(format.name, cricket::kVp8CodecName))
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return VP8Encoder::Create();
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if (cricket::CodecNamesEq(format.name, cricket::kVp9CodecName))
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return VP9Encoder::Create();
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if (cricket::CodecNamesEq(format.name, cricket::kH264CodecName))
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return H264Encoder::Create(cricket::VideoCodec(format));
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RTC_LOG(LS_ERROR) << "Trying to created encoder of unsupported format "
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<< format.name;
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return nullptr;
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}
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} // namespace webrtc
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