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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_forward.h" | 8 #include "base/callback_forward.h" |
9 #include "base/macros.h" | 9 #include "base/macros.h" |
10 #include "media/base/media_export.h" | 10 #include "media/base/media_export.h" |
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26 | 26 |
27 // Initializes a VideoRenderer with |stream|, executing |init_cb| upon | 27 // Initializes a VideoRenderer with |stream|, executing |init_cb| upon |
28 // completion. If initialization fails, only |init_cb| | 28 // completion. If initialization fails, only |init_cb| |
29 // (not RendererClient::OnError) will be called. | 29 // (not RendererClient::OnError) will be called. |
30 // | 30 // |
31 // |cdm_context| can be used to handle encrypted streams. May be null if the | 31 // |cdm_context| can be used to handle encrypted streams. May be null if the |
32 // stream is not encrypted. | 32 // stream is not encrypted. |
33 // | 33 // |
34 // |wall_clock_time_cb| is used to convert media timestamps into wallclock | 34 // |wall_clock_time_cb| is used to convert media timestamps into wallclock |
35 // timestamps. | 35 // timestamps. |
| 36 // |
| 37 // VideoRenderer may be reinitialized for playback of a different demuxer |
| 38 // stream by calling Initialize again when the renderer is in a flushed |
| 39 // state (i.e. after Flush call, but before StartPlayingFrom). This is used |
| 40 // for media track switching. |
36 virtual void Initialize(DemuxerStream* stream, | 41 virtual void Initialize(DemuxerStream* stream, |
37 CdmContext* cdm_context, | 42 CdmContext* cdm_context, |
38 RendererClient* client, | 43 RendererClient* client, |
39 const TimeSource::WallClockTimeCB& wall_clock_time_cb, | 44 const TimeSource::WallClockTimeCB& wall_clock_time_cb, |
40 const PipelineStatusCB& init_cb) = 0; | 45 const PipelineStatusCB& init_cb) = 0; |
41 | 46 |
42 // Discards any video data and stops reading from |stream|, executing | 47 // Discards any video data and stops reading from |stream|, executing |
43 // |callback| when completed. | 48 // |callback| when completed. |
44 // | 49 // |
45 // Clients should expect |buffering_state_cb| to be called with | 50 // Clients should expect |buffering_state_cb| to be called with |
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58 virtual void OnTimeProgressing() = 0; | 63 virtual void OnTimeProgressing() = 0; |
59 virtual void OnTimeStopped() = 0; | 64 virtual void OnTimeStopped() = 0; |
60 | 65 |
61 private: | 66 private: |
62 DISALLOW_COPY_AND_ASSIGN(VideoRenderer); | 67 DISALLOW_COPY_AND_ASSIGN(VideoRenderer); |
63 }; | 68 }; |
64 | 69 |
65 } // namespace media | 70 } // namespace media |
66 | 71 |
67 #endif // MEDIA_BASE_VIDEO_RENDERER_H_ | 72 #endif // MEDIA_BASE_VIDEO_RENDERER_H_ |
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