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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_MEDIASTREAM_MEDIA_STREAM_VIDEO_RENDERER_SINK_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_MEDIASTREAM_MEDIA_STREAM_VIDEO_RENDERER_SINK_H_
#include "base/functional/callback.h"
#include "base/memory/scoped_refptr.h"
#include "base/memory/weak_ptr.h"
#include "base/task/sequenced_task_runner.h"
#include "base/threading/thread_checker.h"
#include "third_party/blink/public/platform/media/video_capture.h"
#include "third_party/blink/public/web/modules/mediastream/media_stream_video_sink.h"
#include "third_party/blink/renderer/modules/mediastream/media_stream_video_renderer.h"
#include "third_party/blink/renderer/modules/modules_export.h"
#include "third_party/blink/renderer/platform/mediastream/media_stream_component.h"
#include "ui/gfx/geometry/size.h"
namespace base {
class SingleThreadTaskRunner;
} // namespace base
namespace blink {
// MediaStreamVideoRendererSink is a MediaStreamVideoRenderer designed
// for rendering Video MediaStreamTracks [1], MediaStreamVideoRendererSink
// implements MediaStreamVideoSink in order to render video frames provided from
// a MediaStreamVideoTrack, to which it connects itself when the
// MediaStreamVideoRenderer is Start()ed, and disconnects itself when the latter
// is Stop()ed.
//
// [1] https://dev.w3.org/2011/webrtc/editor/getusermedia.html#mediastreamtrack
//
// TODO(wuchengli): Add unit test. See the link below for reference.
// https://src.chromium.org/viewvc/chrome/trunk/src/content/renderer/media/rtc_
// video_decoder_unittest.cc?revision=180591&view=markup
class MODULES_EXPORT MediaStreamVideoRendererSink
: public MediaStreamVideoRenderer,
public MediaStreamVideoSink {
public:
MediaStreamVideoRendererSink(
MediaStreamComponent* video_component,
const MediaStreamVideoRenderer::RepaintCB& repaint_cb,
scoped_refptr<base::SequencedTaskRunner> video_task_runner,
scoped_refptr<base::SingleThreadTaskRunner> main_render_task_runner);
MediaStreamVideoRendererSink(const MediaStreamVideoRendererSink&) = delete;
MediaStreamVideoRendererSink& operator=(const MediaStreamVideoRendererSink&) =
delete;
// MediaStreamVideoRenderer implementation. Called on the main
// thread.
void Start() override;
void Stop() override;
void Resume() override;
void Pause() override;
protected:
~MediaStreamVideoRendererSink() override;
private:
friend class MediaStreamVideoRendererSinkTest;
enum State {
kStarted,
kPaused,
kStopped,
};
// MediaStreamVideoSink implementation. Called on the main thread.
void OnReadyStateChanged(WebMediaStreamSource::ReadyState state) override;
// Helper method used for testing.
State GetStateForTesting();
const RepaintCB repaint_cb_;
Persistent<MediaStreamComponent> video_component_;
// Inner class used for transfering frames on compositor thread and running
// |repaint_cb_|.
class FrameDeliverer;
std::unique_ptr<FrameDeliverer> frame_deliverer_;
const scoped_refptr<base::SequencedTaskRunner> video_task_runner_;
const scoped_refptr<base::SingleThreadTaskRunner> main_render_task_runner_;
THREAD_CHECKER(main_thread_checker_);
base::WeakPtrFactory<MediaStreamVideoRendererSink> weak_factory_{this};
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_MEDIASTREAM_MEDIA_STREAM_VIDEO_RENDERER_SINK_H_
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