chromecast/media/cma/ipc_streamer/coded_frame_provider_host.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 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
  15 namespace chromecast {
  16 namespace media {
  17 class MediaMessageFifo;
  18
  19 // CodedFrameProviderHost is a frame provider that gets the frames
  20 // from a media message fifo.
  21 class 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   ~CodedFrameProviderHost() override;
  29
  30   // CodedFrameProvider implementation.
  31   void Read(const ReadCB& read_cb) override;
  32   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::WeakPtr<CodedFrameProviderHost> weak_this_;
  53   base::WeakPtrFactory<CodedFrameProviderHost> weak_factory_;
  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_