5ad129741c
BUG=webrtc:5420 NOTRY=True R=pthatcher@google.com, pthatcher@webrtc.org Review URL: https://codereview.webrtc.org/1684163002 . Cr-Commit-Position: refs/heads/master@{#11591}
82 lines
2.6 KiB
C++
82 lines
2.6 KiB
C++
/*
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* Copyright 2012 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 "webrtc/api/videotrackrenderers.h"
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#include "webrtc/media/engine/webrtcvideoframe.h"
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namespace webrtc {
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VideoTrackRenderers::VideoTrackRenderers() : enabled_(true) {
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}
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VideoTrackRenderers::~VideoTrackRenderers() {
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}
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void VideoTrackRenderers::AddRenderer(VideoRendererInterface* renderer) {
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if (!renderer) {
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return;
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}
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rtc::CritScope cs(&critical_section_);
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renderers_.insert(renderer);
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}
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void VideoTrackRenderers::RemoveRenderer(VideoRendererInterface* renderer) {
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rtc::CritScope cs(&critical_section_);
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renderers_.erase(renderer);
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}
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void VideoTrackRenderers::SetEnabled(bool enable) {
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rtc::CritScope cs(&critical_section_);
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enabled_ = enable;
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}
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bool VideoTrackRenderers::RenderFrame(const cricket::VideoFrame* frame) {
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{
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rtc::CritScope cs(&critical_section_);
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if (enabled_) {
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RenderFrameToRenderers(frame);
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return true;
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}
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}
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// Generate the black frame outside of the critical section. Note
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// that this may result in unexpected frame order, in the unlikely
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// case that RenderFrame is called from multiple threads without
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// proper serialization, and the track is switched from disabled to
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// enabled in the middle of the first call.
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cricket::WebRtcVideoFrame black(new rtc::RefCountedObject<I420Buffer>(
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static_cast<int>(frame->GetWidth()),
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static_cast<int>(frame->GetHeight())),
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frame->GetTimeStamp(),
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frame->GetVideoRotation());
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black.SetToBlack();
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{
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rtc::CritScope cs(&critical_section_);
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// Check enabled_ flag again, since the track might have been
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// enabled while we generated the black frame. I think the
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// enabled-ness ought to be applied at the track output, and hence
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// an enabled track shouldn't send any blacked out frames.
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RenderFrameToRenderers(enabled_ ? frame : &black);
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return true;
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}
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}
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// Called with critical_section_ already locked
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void VideoTrackRenderers::RenderFrameToRenderers(
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const cricket::VideoFrame* frame) {
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for (VideoRendererInterface* renderer : renderers_) {
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renderer->RenderFrame(frame);
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}
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}
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} // namespace webrtc
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