4fe6adc06a
TBR=stefan@webrtc.org Bug: webrtc:7925 Change-Id: I84239b071a2608d928f09b06809090eec5eafb14 Reviewed-on: https://webrtc-review.googlesource.com/21165 Commit-Queue: Magnus Jedvert <magjed@webrtc.org> Reviewed-by: Erik Språng <sprang@webrtc.org> Cr-Commit-Position: refs/heads/master@{#20650}
88 lines
3.1 KiB
C++
88 lines
3.1 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 "system_wrappers/include/field_trial.h"
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namespace cricket {
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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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InternalEncoderFactory::InternalEncoderFactory() {
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supported_codecs_.push_back(VideoCodec(kVp8CodecName));
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if (webrtc::VP9Encoder::IsSupported())
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supported_codecs_.push_back(VideoCodec(kVp9CodecName));
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for (const webrtc::SdpVideoFormat& format : webrtc::SupportedH264Codecs())
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supported_codecs_.push_back(VideoCodec(format));
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supported_codecs_.push_back(VideoCodec(kRedCodecName));
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supported_codecs_.push_back(VideoCodec(kUlpfecCodecName));
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if (IsFlexfecAdvertisedFieldTrialEnabled()) {
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VideoCodec flexfec_codec(kFlexfecCodecName);
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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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flexfec_codec.SetParam(kFlexfecFmtpRepairWindow, "10000000");
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supported_codecs_.push_back(flexfec_codec);
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}
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}
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InternalEncoderFactory::~InternalEncoderFactory() {}
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// WebRtcVideoEncoderFactory implementation.
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webrtc::VideoEncoder* InternalEncoderFactory::CreateVideoEncoder(
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const VideoCodec& codec) {
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const webrtc::VideoCodecType codec_type =
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webrtc::PayloadStringToCodecType(codec.name);
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switch (codec_type) {
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case webrtc::kVideoCodecH264:
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return webrtc::H264Encoder::Create(codec).release();
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case webrtc::kVideoCodecVP8:
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return webrtc::VP8Encoder::Create().release();
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case webrtc::kVideoCodecVP9:
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return webrtc::VP9Encoder::Create().release();
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default:
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return nullptr;
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}
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}
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const std::vector<VideoCodec>&
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InternalEncoderFactory::supported_codecs() const {
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return supported_codecs_;
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}
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void InternalEncoderFactory::DestroyVideoEncoder(
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webrtc::VideoEncoder* encoder) {
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delete encoder;
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}
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} // namespace cricket
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