Upstream version 7.36.149.0
[platform/framework/web/crosswalk.git] / src / media / filters / video_frame_scheduler_proxy.h
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
3 // found in the LICENSE file.
4
5 #ifndef MEDIA_FILTERS_VIDEO_FRAME_SCHEDULER_PROXY_H_
6 #define MEDIA_FILTERS_VIDEO_FRAME_SCHEDULER_PROXY_H_
7
8 #include "base/memory/weak_ptr.h"
9 #include "media/filters/video_frame_scheduler.h"
10
11 namespace base {
12 class SingleThreadTaskRunner;
13 }
14
15 namespace media {
16
17 // Provides a thread-safe proxy for a VideoFrameScheduler. Typical use is to
18 // use a real VideoFrameScheduler on the task runner responsible for graphics
19 // display and provide a proxy on the task runner responsible for background
20 // video decoding.
21 class MEDIA_EXPORT VideoFrameSchedulerProxy : public VideoFrameScheduler {
22  public:
23   // |task_runner| is the runner that this object will be called on.
24   // |scheduler_runner| is the runner that |scheduler| will be called on.
25   // |scheduler| will be deleted on |scheduler_runner|.
26   VideoFrameSchedulerProxy(
27       const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
28       const scoped_refptr<base::SingleThreadTaskRunner>& scheduler_runner,
29       scoped_ptr<VideoFrameScheduler> scheduler);
30   virtual ~VideoFrameSchedulerProxy();
31
32   // VideoFrameScheduler implementation.
33   virtual void ScheduleVideoFrame(const scoped_refptr<VideoFrame>& frame,
34                                   base::TimeTicks wall_ticks,
35                                   const DoneCB& done_cb) OVERRIDE;
36   virtual void Reset() OVERRIDE;
37
38  private:
39   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
40   scoped_refptr<base::SingleThreadTaskRunner> scheduler_runner_;
41   scoped_ptr<VideoFrameScheduler> scheduler_;
42
43   // NOTE: Weak pointers must be invalidated before all other member variables.
44   base::WeakPtrFactory<VideoFrameSchedulerProxy> weak_factory_;
45
46   DISALLOW_COPY_AND_ASSIGN(VideoFrameSchedulerProxy);
47 };
48
49 }  // namespace media
50
51 #endif  // MEDIA_FILTERS_VIDEO_FRAME_SCHEDULER_PROXY_H_