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1 // Copyright 2013 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef WEBKIT_RENDERER_MEDIA_VIDEO_FRAME_PROVIDER_H_ | |
6 #define WEBKIT_RENDERER_MEDIA_VIDEO_FRAME_PROVIDER_H_ | |
7 | |
8 #include "base/callback.h" | |
9 #include "base/memory/ref_counted.h" | |
10 | |
11 namespace media { | |
12 class VideoFrame; | |
13 } | |
14 | |
15 namespace webkit_media { | |
16 | |
17 // Define an interface to provide a sequence of video frames to clients. | |
18 // TODO(wjia): remove ref count. | |
19 class VideoFrameProvider | |
20 : public base::RefCountedThreadSafe<VideoFrameProvider> { | |
21 public: | |
22 typedef base::Callback<void(const scoped_refptr<media::VideoFrame>&)> | |
23 RepaintCB; | |
24 | |
25 // Start to provide video frames to the caller. | |
26 virtual void Start() = 0; | |
27 | |
28 // Stop to provide video frames to the caller. | |
29 virtual void Stop() = 0; | |
30 | |
31 // Resume to provide video frames to the caller after being paused. | |
32 virtual void Play() = 0; | |
33 | |
34 // Put the provider in pause state and the caller will not receive video | |
35 // frames, but the provider might still generate video frames which are | |
36 // thrown away. | |
37 virtual void Pause() = 0; | |
38 | |
39 protected: | |
40 friend class base::RefCountedThreadSafe<VideoFrameProvider>; | |
41 VideoFrameProvider(); | |
42 virtual ~VideoFrameProvider(); | |
43 | |
44 private: | |
45 DISALLOW_COPY_AND_ASSIGN(VideoFrameProvider); | |
46 }; | |
47 | |
48 } // namespace webkit_media | |
49 | |
50 #endif // WEBKIT_RENDERER_MEDIA_VIDEO_FRAME_PROVIDER_H_ | |
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