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 CONTENT_RENDERER_MEDIA_VIDEO_FRAME_PROVIDER_H_ 6 #define CONTENT_RENDERER_MEDIA_VIDEO_FRAME_PROVIDER_H_ 7 8 #include "base/callback.h" 9 #include "base/memory/ref_counted.h" 10 #include "content/common/content_export.h" 11 12 namespace media { 13 class VideoFrame; 14 } 15 16 namespace content { 17 18 // Define an interface to provide a sequence of video frames to clients. 19 // TODO(wjia): remove ref count. 20 // TODO(wjia): rename interface so it doesn't clash with cc::VideoFrameProvider. 21 class CONTENT_EXPORT VideoFrameProvider 22 : public base::RefCountedThreadSafe<VideoFrameProvider> { 23 public: 24 typedef base::Callback<void(const scoped_refptr<media::VideoFrame>&)> 25 RepaintCB; 26 27 // Start to provide video frames to the caller. 28 virtual void Start() = 0; 29 30 // Stop to provide video frames to the caller. 31 virtual void Stop() = 0; 32 33 // Resume to provide video frames to the caller after being paused. 34 virtual void Play() = 0; 35 36 // Put the provider in pause state and the caller will not receive video 37 // frames, but the provider might still generate video frames which are 38 // thrown away. 39 virtual void Pause() = 0; 40 41 protected: 42 friend class base::RefCountedThreadSafe<VideoFrameProvider>; 43 44 VideoFrameProvider(); 45 virtual ~VideoFrameProvider(); 46 47 private: 48 DISALLOW_COPY_AND_ASSIGN(VideoFrameProvider); 49 }; 50 51 } // namespace content 52 53 #endif // CONTENT_RENDERER_MEDIA_VIDEO_FRAME_PROVIDER_H_ 54
