coded_frame_provider_host.h revision 1320f92c476a1ad9d19dba2a48c72b75566198e9 
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 CHROMECAST_MEDIA_CMA_IPC_STREAMER_CODED_FRAME_PROVIDER_HOST_H_
6#define CHROMECAST_MEDIA_CMA_IPC_STREAMER_CODED_FRAME_PROVIDER_HOST_H_
7
8#include "base/callback.h"
9#include "base/memory/weak_ptr.h"
10#include "base/threading/thread_checker.h"
11#include "chromecast/media/cma/base/coded_frame_provider.h"
12#include "media/base/audio_decoder_config.h"
13#include "media/base/video_decoder_config.h"
14
15namespace chromecast {
16namespace media {
17class MediaMessageFifo;
18
19// CodedFrameProviderHost is a frame provider that gets the frames
20// from a media message fifo.
21class CodedFrameProviderHost : public CodedFrameProvider {
22 public:
23  // Note: if the media message fifo is located into shared memory,
24  // the caller must make sure the shared memory segment is valid
25  // during the whole lifetime of this object.
26  explicit CodedFrameProviderHost(
27      scoped_ptr<MediaMessageFifo> media_message_fifo);
28  virtual ~CodedFrameProviderHost();
29
30  // CodedFrameProvider implementation.
31  virtual void Read(const ReadCB& read_cb) OVERRIDE;
32  virtual void Flush(const base::Closure& flush_cb) OVERRIDE;
33
34  // Invoked when some data has been written into the fifo.
35  void OnFifoWriteEvent();
36  base::Closure GetFifoWriteEventCb();
37
38 private:
39  void ReadMessages();
40
41  base::ThreadChecker thread_checker_;
42
43  // Fifo holding the frames.
44  scoped_ptr<MediaMessageFifo> fifo_;
45
46  ReadCB read_cb_;
47
48  // Audio/video configuration for the next A/V buffer.
49  ::media::AudioDecoderConfig audio_config_;
50  ::media::VideoDecoderConfig video_config_;
51
52  base::WeakPtrFactory<CodedFrameProviderHost> weak_factory_;
53  base::WeakPtr<CodedFrameProviderHost> weak_this_;
54
55  DISALLOW_COPY_AND_ASSIGN(CodedFrameProviderHost);
56};
57
58}  // namespace media
59}  // namespace chromecast
60
61#endif  // CHROMECAST_MEDIA_CMA_IPC_STREAMER_CODED_FRAME_PROVIDER_HOST_H_
62