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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_RENDERER_MEDIA_RTC_VIDEO_RENDERER_H_
#define CONTENT_RENDERER_MEDIA_RTC_VIDEO_RENDERER_H_
#include "base/callback.h"
#include "base/memory/weak_ptr.h"
#include "content/common/content_export.h"
#include "content/common/media/video_capture.h"
#include "content/public/renderer/media_stream_video_sink.h"
#include "content/renderer/media/video_frame_provider.h"
#include "third_party/WebKit/public/platform/WebMediaStreamTrack.h"
#include "ui/gfx/geometry/size.h"
namespace base {
class MessageLoopProxy;
}
namespace content {
// RTCVideoRenderer is a VideoFrameProvider designed for rendering Video
// MediaStreamTracks [1], RTCVideoRenderer implements MediaStreamVideoSink in
// order to render video frames provided from a MediaStreamVideoTrack, to which
// it AddToVideoTrack()s itself when the VideoFrameProvider is Start()ed
// and RemoveFromVideoTrack()s itself when the latter is Stop()ed.
//
// [1] http://dev.w3.org/2011/webrtc/editor/getusermedia.html#mediastreamtrack
//
// TODO(wuchengli): Add unit test. See the link below for reference.
// http://src.chromium.org/viewvc/chrome/trunk/src/content/renderer/media/rtc_vi
// deo_decoder_unittest.cc?revision=180591&view=markup
class CONTENT_EXPORT RTCVideoRenderer
: NON_EXPORTED_BASE(public VideoFrameProvider),
NON_EXPORTED_BASE(public MediaStreamVideoSink) {
public:
RTCVideoRenderer(const blink::WebMediaStreamTrack& video_track,
const base::Closure& error_cb,
const RepaintCB& repaint_cb);
// VideoFrameProvider implementation. Called on the main thread.
void Start() override;
void Stop() override;
void Play() override;
void Pause() override;
protected:
~RTCVideoRenderer() override;
private:
enum State {
STARTED,
PAUSED,
STOPPED,
};
void OnVideoFrame(const scoped_refptr<media::VideoFrame>& frame,
const base::TimeTicks& estimated_capture_time);
// MediaStreamVideoSink implementation. Called on the main thread.
void OnReadyStateChanged(
blink::WebMediaStreamSource::ReadyState state) override;
void RenderSignalingFrame();
const base::Closure error_cb_;
const RepaintCB repaint_cb_;
const scoped_refptr<base::MessageLoopProxy> message_loop_proxy_;
State state_;
gfx::Size frame_size_;
const blink::WebMediaStreamTrack video_track_;
base::WeakPtrFactory<RTCVideoRenderer> weak_factory_;
DISALLOW_COPY_AND_ASSIGN(RTCVideoRenderer);
};
} // namespace content
#endif // CONTENT_RENDERER_MEDIA_RTC_VIDEO_RENDERER_H_
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