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Side by Side Diff: media/blink/video_frame_compositor.h

Issue 1430063003: use MEDIA_BLINK_EXPORT in media/blink (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: no (c) Created 5 years, 1 month ago
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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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