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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 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_FILTERS_VIDEO_FRAME_SCHEDULER_H_ | 5 #ifndef MEDIA_FILTERS_VIDEO_FRAME_SCHEDULER_H_ |
6 #define MEDIA_FILTERS_VIDEO_FRAME_SCHEDULER_H_ | 6 #define MEDIA_FILTERS_VIDEO_FRAME_SCHEDULER_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 "media/base/media_export.h" | 11 #include "media/base/media_export.h" |
11 | 12 |
12 namespace media { | 13 namespace media { |
13 | 14 |
14 class VideoFrame; | 15 class VideoFrame; |
15 | 16 |
16 // Defines an abstract video frame scheduler that is capable of managing the | 17 // Defines an abstract video frame scheduler that is capable of managing the |
17 // display of video frames at explicit times. | 18 // display of video frames at explicit times. |
18 class MEDIA_EXPORT VideoFrameScheduler { | 19 class MEDIA_EXPORT VideoFrameScheduler { |
19 public: | 20 public: |
20 VideoFrameScheduler() {} | 21 VideoFrameScheduler() {} |
21 virtual ~VideoFrameScheduler() {} | 22 virtual ~VideoFrameScheduler() {} |
22 | 23 |
23 enum Reason { | 24 enum Reason { |
24 DISPLAYED, // Frame was displayed. | 25 DISPLAYED, // Frame was displayed. |
25 DROPPED, // Frame was dropped. | 26 DROPPED, // Frame was dropped. |
26 RESET, // Scheduler was reset before frame was scheduled for display. | 27 RESET, // Scheduler was reset before frame was scheduled for display. |
27 }; | 28 }; |
28 typedef base::Callback<void(const scoped_refptr<VideoFrame>&, Reason)> DoneCB; | 29 typedef base::Callback<void(const scoped_refptr<VideoFrame>&, Reason)> DoneCB; |
29 | 30 |
30 // Schedule |frame| to be displayed at |wall_ticks|, firing |done_cb| when | 31 // Schedule |frame| to be displayed at |wall_ticks|, firing |done_cb| when |
31 // the scheduler has finished with the frame. | 32 // the scheduler has finished with the frame. |
32 virtual void ScheduleVideoFrame(const scoped_refptr<VideoFrame>& frame, | 33 virtual void ScheduleVideoFrame(const scoped_refptr<VideoFrame>& frame, |
33 base::TimeTicks wall_ticks, | 34 base::TimeTicks wall_ticks, |
34 const DoneCB& done_cb) = 0; | 35 const DoneCB& done_cb) = 0; |
35 | 36 |
36 // Causes the scheduler to release all previously scheduled frames. Frames | 37 // Causes the scheduler to release all previously scheduled frames. Frames |
37 // will be returned as RESET. | 38 // will be returned as RESET. |
38 virtual void Reset() = 0; | 39 virtual void Reset() = 0; |
acolwell GONE FROM CHROMIUM
2014/04/24 16:43:59
nit: You might want add a note here warning people
scherkus (not reviewing)
2014/04/25 02:04:47
Done.
| |
39 }; | 40 }; |
40 | 41 |
41 } // namespace media | 42 } // namespace media |
42 | 43 |
43 #endif // MEDIA_FILTERS_VIDEO_FRAME_SCHEDULER_H_ | 44 #endif // MEDIA_FILTERS_VIDEO_FRAME_SCHEDULER_H_ |
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