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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef MEDIA_BASE_VIDEO_RENDERER_H_ | 5 #ifndef MEDIA_BASE_VIDEO_RENDERER_H_ |
6 #define MEDIA_BASE_VIDEO_RENDERER_H_ | 6 #define MEDIA_BASE_VIDEO_RENDERER_H_ |
7 | 7 |
8 #include "base/callback.h" | 8 #include "base/callback.h" |
9 #include "base/memory/ref_counted.h" | 9 #include "base/memory/ref_counted.h" |
10 #include "base/time/time.h" | 10 #include "base/time/time.h" |
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42 // | 42 // |
43 // |paint_cb| is executed on the video frame timing thread whenever a new | 43 // |paint_cb| is executed on the video frame timing thread whenever a new |
44 // frame is available for painting. Can be called from any thread. | 44 // frame is available for painting. Can be called from any thread. |
45 // | 45 // |
46 // |ended_cb| is executed when video rendering has reached the end of stream. | 46 // |ended_cb| is executed when video rendering has reached the end of stream. |
47 // | 47 // |
48 // |error_cb| is executed if an error was encountered. | 48 // |error_cb| is executed if an error was encountered. |
49 // | 49 // |
50 // |get_time_cb| is used to query the current media playback time. | 50 // |get_time_cb| is used to query the current media playback time. |
51 virtual void Initialize(DemuxerStream* stream, | 51 virtual void Initialize(DemuxerStream* stream, |
52 bool low_delay, | |
53 const PipelineStatusCB& init_cb, | 52 const PipelineStatusCB& init_cb, |
54 const StatisticsCB& statistics_cb, | 53 const StatisticsCB& statistics_cb, |
55 const BufferingStateCB& buffering_state_cb, | 54 const BufferingStateCB& buffering_state_cb, |
56 const PaintCB& paint_cb, | 55 const PaintCB& paint_cb, |
57 const base::Closure& ended_cb, | 56 const base::Closure& ended_cb, |
58 const PipelineStatusCB& error_cb, | 57 const PipelineStatusCB& error_cb, |
59 const TimeDeltaCB& get_time_cb) = 0; | 58 const TimeDeltaCB& get_time_cb) = 0; |
60 | 59 |
61 // Discards any video data and stops reading from |stream|, executing | 60 // Discards any video data and stops reading from |stream|, executing |
62 // |callback| when completed. | 61 // |callback| when completed. |
63 // | 62 // |
64 // Clients should expect |buffering_state_cb| to be called with | 63 // Clients should expect |buffering_state_cb| to be called with |
65 // BUFFERING_HAVE_NOTHING while flushing is in progress. | 64 // BUFFERING_HAVE_NOTHING while flushing is in progress. |
66 virtual void Flush(const base::Closure& callback) = 0; | 65 virtual void Flush(const base::Closure& callback) = 0; |
67 | 66 |
68 // Starts playback at |timestamp| by reading from |stream| and decoding and | 67 // Starts playback at |timestamp| by reading from |stream| and decoding and |
69 // rendering video. | 68 // rendering video. |
70 // | 69 // |
71 // Only valid to call after a successful Initialize() or Flush(). | 70 // Only valid to call after a successful Initialize() or Flush(). |
72 virtual void StartPlayingFrom(base::TimeDelta timestamp) = 0; | 71 virtual void StartPlayingFrom(base::TimeDelta timestamp) = 0; |
73 | 72 |
74 private: | 73 private: |
75 DISALLOW_COPY_AND_ASSIGN(VideoRenderer); | 74 DISALLOW_COPY_AND_ASSIGN(VideoRenderer); |
76 }; | 75 }; |
77 | 76 |
78 } // namespace media | 77 } // namespace media |
79 | 78 |
80 #endif // MEDIA_BASE_VIDEO_RENDERER_H_ | 79 #endif // MEDIA_BASE_VIDEO_RENDERER_H_ |
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