81354f5ef6
If the track is disabled, replace incoming frames by black frames. Affects local rendering of disabled tracks. Also intended to replace the similar logic in WebRtcVideoChannel2::WebRtcVideoSendStream::InputFrame, once VideoRtpSender is hooked up as a renderer for the track. BUG=webrtc:5426 Review URL: https://codereview.webrtc.org/1575223003 Cr-Commit-Position: refs/heads/master@{#11297}
99 lines
3.6 KiB
C++
99 lines
3.6 KiB
C++
/*
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* libjingle
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* Copyright 2012 Google Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "talk/app/webrtc/videotrackrenderers.h"
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#include "talk/media/webrtc/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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