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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #ifndef CONTENT_RENDERER_MEDIA_RTC_VIDEO_DECODER_H_ | |
| 6 #define CONTENT_RENDERER_MEDIA_RTC_VIDEO_DECODER_H_ | |
| 7 | |
| 8 #include <string> | |
| 9 | |
| 10 #include "base/compiler_specific.h" | |
| 11 #include "base/gtest_prod_util.h" | |
| 12 #include "base/synchronization/lock.h" | |
| 13 #include "base/task_runner.h" | |
| 14 #include "base/time.h" | |
| 15 #include "content/common/content_export.h" | |
| 16 #include "media/base/video_decoder.h" | |
| 17 #include "third_party/libjingle/source/talk/app/webrtc/mediastreaminterface.h" | |
| 18 | |
| 19 | |
| 20 namespace cricket { | |
| 21 class VideoFrame; | |
| 22 } // namespace cricket | |
| 23 | |
| 24 namespace content { | |
| 25 | |
| 26 // RTCVideoDecoder is a media::VideoDecoder designed for rendering | |
| 27 // Video MediaStreamTracks, | |
| 28 // http://dev.w3.org/2011/webrtc/editor/getusermedia.html#mediastreamtrack | |
| 29 // RTCVideoDecoder implements webrtc::VideoRendererInterface in order to render | |
| 30 // video frames provided from a webrtc::VideoTrackInteface. | |
| 31 // RTCVideoDecoder register itself to the Video Track when the decoder is | |
| 32 // initialized and deregisters itself when it is stopped. | |
| 33 // Calls to webrtc::VideoTrackInterface must occur on the main render thread. | |
| 34 class CONTENT_EXPORT RTCVideoDecoder | |
| 35 : public media::VideoDecoder, | |
| 36 NON_EXPORTED_BASE(public webrtc::VideoRendererInterface) { | |
| 37 public: | |
| 38 RTCVideoDecoder(base::TaskRunner* video_decoder_thread, // For video decoder | |
| 39 base::TaskRunner* main_thread, // For accessing VideoTracks. | |
| 40 webrtc::VideoTrackInterface* video_track); | |
| 41 | |
| 42 // media::VideoDecoder implementation. | |
| 43 virtual void Initialize(const scoped_refptr<media::DemuxerStream>& stream, | |
| 44 const media::PipelineStatusCB& status_cb, | |
| 45 const media::StatisticsCB& statistics_cb) OVERRIDE; | |
| 46 virtual void Read(const ReadCB& read_cb) OVERRIDE; | |
| 47 virtual void Reset(const base::Closure& closure) OVERRIDE; | |
| 48 virtual void Stop(const base::Closure& closure) OVERRIDE; | |
| 49 | |
| 50 // webrtc::VideoRendererInterface implementation | |
| 51 virtual void SetSize(int width, int height) OVERRIDE; | |
| 52 virtual void RenderFrame(const cricket::VideoFrame* frame) OVERRIDE; | |
| 53 | |
| 54 protected: | |
| 55 virtual ~RTCVideoDecoder(); | |
| 56 | |
| 57 private: | |
| 58 friend class RTCVideoDecoderTest; | |
| 59 FRIEND_TEST_ALL_PREFIXES(RTCVideoDecoderTest, Initialize_Successful); | |
| 60 FRIEND_TEST_ALL_PREFIXES(RTCVideoDecoderTest, DoReset); | |
| 61 FRIEND_TEST_ALL_PREFIXES(RTCVideoDecoderTest, DoRenderFrame); | |
| 62 FRIEND_TEST_ALL_PREFIXES(RTCVideoDecoderTest, DoSetSize); | |
| 63 | |
| 64 enum DecoderState { | |
| 65 kUnInitialized, | |
| 66 kNormal, | |
| 67 kStopped | |
| 68 }; | |
| 69 | |
| 70 void CancelPendingRead(); | |
| 71 | |
| 72 // Register this RTCVideoDecoder to get VideoFrames from the | |
| 73 // webrtc::VideoTrack in |video_track_|. | |
| 74 // This is done on the |main_thread_|. | |
| 75 void RegisterToVideoTrack(); | |
| 76 void DeregisterFromVideoTrack(); | |
| 77 | |
| 78 scoped_refptr<base::TaskRunner> video_decoder_thread_; | |
| 79 scoped_refptr<base::TaskRunner> main_thread_; | |
| 80 gfx::Size visible_size_; | |
| 81 std::string url_; | |
| 82 DecoderState state_; | |
| 83 ReadCB read_cb_; | |
| 84 bool got_first_frame_; | |
| 85 base::TimeDelta last_frame_timestamp_; | |
| 86 base::TimeDelta start_time_; | |
| 87 // The video track the renderer is connected to. | |
| 88 scoped_refptr<webrtc::VideoTrackInterface> video_track_; | |
| 89 | |
| 90 // Used for accessing |read_cb_| from another thread. | |
| 91 base::Lock lock_; | |
| 92 | |
| 93 DISALLOW_COPY_AND_ASSIGN(RTCVideoDecoder); | |
| 94 }; | |
| 95 | |
| 96 } // namespace content | |
| 97 | |
| 98 #endif // CONTENT_RENDERER_MEDIA_RTC_VIDEO_DECODER_H_ | |
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