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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_BLINK_VIDEO_FRAME_COMPOSITOR_H_ | 5 #ifndef MEDIA_BLINK_VIDEO_FRAME_COMPOSITOR_H_ |
6 #define MEDIA_BLINK_VIDEO_FRAME_COMPOSITOR_H_ | 6 #define MEDIA_BLINK_VIDEO_FRAME_COMPOSITOR_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/single_thread_task_runner.h" | 10 #include "base/single_thread_task_runner.h" |
11 #include "base/synchronization/lock.h" | 11 #include "base/synchronization/lock.h" |
12 #include "base/time/tick_clock.h" | 12 #include "base/time/tick_clock.h" |
13 #include "base/timer/timer.h" | 13 #include "base/timer/timer.h" |
14 #include "cc/layers/video_frame_provider.h" | 14 #include "cc/layers/video_frame_provider.h" |
15 #include "media/base/media_export.h" | |
16 #include "media/base/video_renderer_sink.h" | 15 #include "media/base/video_renderer_sink.h" |
| 16 #include "media/blink/media_blink_export.h" |
17 #include "ui/gfx/geometry/size.h" | 17 #include "ui/gfx/geometry/size.h" |
18 | 18 |
19 namespace media { | 19 namespace media { |
20 class VideoFrame; | 20 class VideoFrame; |
21 | 21 |
22 // VideoFrameCompositor acts as a bridge between the media and cc layers for | 22 // VideoFrameCompositor acts as a bridge between the media and cc layers for |
23 // rendering video frames. I.e. a media::VideoRenderer will talk to this class | 23 // rendering video frames. I.e. a media::VideoRenderer will talk to this class |
24 // from the media side, while a cc::VideoFrameProvider::Client will talk to it | 24 // from the media side, while a cc::VideoFrameProvider::Client will talk to it |
25 // from the cc side. | 25 // from the cc side. |
26 // | 26 // |
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37 // | 37 // |
38 // VideoRenderSink::RenderCallback implementations must call Start() and Stop() | 38 // VideoRenderSink::RenderCallback implementations must call Start() and Stop() |
39 // once new frames are expected or are no longer expected to be ready; this data | 39 // once new frames are expected or are no longer expected to be ready; this data |
40 // is relayed to the compositor to avoid extraneous callbacks. | 40 // is relayed to the compositor to avoid extraneous callbacks. |
41 // | 41 // |
42 // VideoFrameCompositor is also responsible for pumping UpdateCurrentFrame() | 42 // VideoFrameCompositor is also responsible for pumping UpdateCurrentFrame() |
43 // callbacks in the background when |client_| has decided to suspend them. | 43 // callbacks in the background when |client_| has decided to suspend them. |
44 // | 44 // |
45 // VideoFrameCompositor must live on the same thread as the compositor, though | 45 // VideoFrameCompositor must live on the same thread as the compositor, though |
46 // it may be constructed on any thread. | 46 // it may be constructed on any thread. |
47 class MEDIA_EXPORT VideoFrameCompositor | 47 class MEDIA_BLINK_EXPORT VideoFrameCompositor |
48 : public VideoRendererSink, | 48 : public VideoRendererSink, |
49 NON_EXPORTED_BASE(public cc::VideoFrameProvider) { | 49 NON_EXPORTED_BASE(public cc::VideoFrameProvider) { |
50 public: | 50 public: |
51 // |compositor_task_runner| is the task runner on which this class will live, | 51 // |compositor_task_runner| is the task runner on which this class will live, |
52 // though it may be constructed on any thread. | 52 // though it may be constructed on any thread. |
53 // | 53 // |
54 // |natural_size_changed_cb| is run with the new natural size of the video | 54 // |natural_size_changed_cb| is run with the new natural size of the video |
55 // frame whenever a change in natural size is detected. It is not called the | 55 // frame whenever a change in natural size is detected. It is not called the |
56 // first time UpdateCurrentFrame() is called. Run on the same thread as the | 56 // first time UpdateCurrentFrame() is called. Run on the same thread as the |
57 // caller of UpdateCurrentFrame(). | 57 // caller of UpdateCurrentFrame(). |
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166 // These values are updated and read from the media and compositor threads. | 166 // These values are updated and read from the media and compositor threads. |
167 base::Lock lock_; | 167 base::Lock lock_; |
168 VideoRendererSink::RenderCallback* callback_; | 168 VideoRendererSink::RenderCallback* callback_; |
169 | 169 |
170 DISALLOW_COPY_AND_ASSIGN(VideoFrameCompositor); | 170 DISALLOW_COPY_AND_ASSIGN(VideoFrameCompositor); |
171 }; | 171 }; |
172 | 172 |
173 } // namespace media | 173 } // namespace media |
174 | 174 |
175 #endif // MEDIA_BLINK_VIDEO_FRAME_COMPOSITOR_H_ | 175 #endif // MEDIA_BLINK_VIDEO_FRAME_COMPOSITOR_H_ |
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