e73afbaf17
The plan is that this interface should be used by all classes which receive a stream of video frames, and replace the two generic classes webrtc::VideoRendererInterface and cricket::VideoRenderer. And the list goes on, there's a dozen of different classes which act as video frame sinks. At some point, we will likely add some method to handle sink properties like, e.g, maximum useful width and height. But hopefully this can be done while keeping the interface very simple. BUG=webrtc:5426 R=perkj@webrtc.org, pthatcher@webrtc.org Committed: https://crrev.com/a862d4563fbc26e52bed442de784094ae1dfe5ee Cr-Commit-Position: refs/heads/master@{#11396} Review URL: https://codereview.webrtc.org/1594973006 Cr-Commit-Position: refs/heads/master@{#11414}
101 lines
3.7 KiB
C++
101 lines
3.7 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/media/base/capturerenderadapter.h"
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#include "talk/media/base/videocapturer.h"
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#include "talk/media/base/videorenderer.h"
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#include "webrtc/base/logging.h"
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namespace cricket {
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CaptureRenderAdapter::CaptureRenderAdapter(VideoCapturer* video_capturer)
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: video_capturer_(video_capturer) {
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}
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CaptureRenderAdapter::~CaptureRenderAdapter() {
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// Since the signal we're connecting to is multi-threaded,
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// disconnect_all() will block until all calls are serviced, meaning any
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// outstanding calls to OnVideoFrame will be done when this is done, and no
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// more calls will be serviced by this.
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// We do this explicitly instead of just letting the has_slots<> destructor
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// take care of it because we need to do this *before* sinks_ is
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// cleared by the destructor; otherwise we could mess with it while
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// OnVideoFrame is running.
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// We *don't* take capture_crit_ here since it could deadlock with the lock
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// taken by the video frame signal.
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disconnect_all();
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}
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CaptureRenderAdapter* CaptureRenderAdapter::Create(
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VideoCapturer* video_capturer) {
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if (!video_capturer) {
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return NULL;
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}
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CaptureRenderAdapter* return_value = new CaptureRenderAdapter(video_capturer);
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return_value->Init(); // Can't fail.
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return return_value;
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}
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void CaptureRenderAdapter::AddSink(rtc::VideoSinkInterface<VideoFrame>* sink) {
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RTC_DCHECK(sink);
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rtc::CritScope cs(&capture_crit_);
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// This implements set semantics, the same renderer can only be
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// added once.
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// TODO(nisse): Is this really needed?
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if (std::find(sinks_.begin(), sinks_.end(), sink) == sinks_.end())
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sinks_.push_back(sink);
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}
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void CaptureRenderAdapter::RemoveSink(
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rtc::VideoSinkInterface<VideoFrame>* sink) {
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RTC_DCHECK(sink);
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rtc::CritScope cs(&capture_crit_);
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sinks_.erase(std::remove(sinks_.begin(), sinks_.end(), sink), sinks_.end());
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}
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void CaptureRenderAdapter::Init() {
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video_capturer_->SignalVideoFrame.connect(
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this,
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&CaptureRenderAdapter::OnVideoFrame);
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}
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void CaptureRenderAdapter::OnVideoFrame(VideoCapturer* capturer,
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const VideoFrame* video_frame) {
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rtc::CritScope cs(&capture_crit_);
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if (sinks_.empty()) {
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return;
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}
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for (auto* sink : sinks_)
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sink->OnFrame(*video_frame);
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}
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} // namespace cricket
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