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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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