| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef WEBKIT_MEDIA_VIDEO_FRAME_PROVIDER_H_ |
| #define WEBKIT_MEDIA_VIDEO_FRAME_PROVIDER_H_ |
| |
| #include "base/callback.h" |
| #include "base/memory/ref_counted.h" |
| |
| namespace media { |
| class VideoFrame; |
| } |
| |
| namespace webkit_media { |
| |
| // Define an interface to provide a sequence of video frames to clients. |
| // TODO(wjia): remove ref count. |
| class VideoFrameProvider |
| : public base::RefCountedThreadSafe<VideoFrameProvider> { |
| public: |
| typedef base::Callback<void(const scoped_refptr<media::VideoFrame>&)> |
| RepaintCB; |
| |
| // Start to provide video frames to the caller. |
| virtual void Start() = 0; |
| |
| // Stop to provide video frames to the caller. |
| virtual void Stop() = 0; |
| |
| // Resume to provide video frames to the caller after being paused. |
| virtual void Play() = 0; |
| |
| // Put the provider in pause state and the caller will not receive video |
| // frames, but the provider might still generate video frames which are |
| // thrown away. |
| virtual void Pause() = 0; |
| |
| protected: |
| friend class base::RefCountedThreadSafe<VideoFrameProvider>; |
| VideoFrameProvider(); |
| virtual ~VideoFrameProvider(); |
| |
| private: |
| DISALLOW_COPY_AND_ASSIGN(VideoFrameProvider); |
| }; |
| |
| } // namespace webkit_media |
| |
| #endif // WEBKIT_MEDIA_VIDEO_FRAME_PROVIDER_H_ |