src/chromecast/media/cma/filters/demuxer_stream_adapter.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_FILTERS_DEMUXER_STREAM_ADAPTER_H_
   6 #define CHROMECAST_MEDIA_CMA_FILTERS_DEMUXER_STREAM_ADAPTER_H_
   7
   8 #include "base/callback.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "base/memory/weak_ptr.h"
  11 #include "base/threading/thread_checker.h"
  12 #include "base/time/time.h"
  13 #include "chromecast/media/cma/base/coded_frame_provider.h"
  14 #include "media/base/audio_decoder_config.h"
  15 #include "media/base/demuxer_stream.h"
  16 #include "media/base/video_decoder_config.h"
  17
  18 namespace base {
  19 class SingleThreadTaskRunner;
  20 }
  21
  22 namespace media {
  23 class DemuxerStream;
  24 }
  25
  26 namespace chromecast {
  27 namespace media {
  28 class BalancedMediaTaskRunnerFactory;
  29 class MediaTaskRunner;
  30
  31 // DemuxerStreamAdapter wraps a DemuxerStream into a CodedFrameProvider.
  32 class DemuxerStreamAdapter : public CodedFrameProvider {
  33  public:
  34   DemuxerStreamAdapter(
  35       const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
  36       const scoped_refptr<BalancedMediaTaskRunnerFactory>&
  37       media_task_runner_factory,
  38       ::media::DemuxerStream* demuxer_stream);
  39   virtual ~DemuxerStreamAdapter();
  40
  41   // CodedFrameProvider implementation.
  42   virtual void Read(const ReadCB& read_cb) override;
  43   virtual void Flush(const base::Closure& flush_cb) override;
  44
  45  private:
  46   void ResetMediaTaskRunner();
  47
  48   void ReadInternal(const ReadCB& read_cb);
  49   void RequestBuffer(const ReadCB& read_cb);
  50
  51   // Callback invoked from the demuxer stream to signal a buffer is ready.
  52   void OnNewBuffer(const ReadCB& read_cb,
  53                    ::media::DemuxerStream::Status status,
  54                    const scoped_refptr< ::media::DecoderBuffer>& input);
  55
  56   base::ThreadChecker thread_checker_;
  57
  58   // Task runner DemuxerStreamAdapter is running on.
  59   scoped_refptr<base::SingleThreadTaskRunner> const task_runner_;
  60
  61   // Media task runner to pace requests to the DemuxerStream.
  62   scoped_refptr<BalancedMediaTaskRunnerFactory> const
  63       media_task_runner_factory_;
  64   scoped_refptr<MediaTaskRunner> media_task_runner_;
  65   base::TimeDelta max_pts_;
  66
  67   // Frames are provided by |demuxer_stream_|.
  68   ::media::DemuxerStream* const demuxer_stream_;
  69
  70   // Indicate if there is a pending read.
  71   bool is_pending_read_;
  72
  73   // Indicate if |demuxer_stream_| has a pending read.
  74   bool is_pending_demuxer_read_;
  75
  76   // In case of a pending flush operation, this is the callback
  77   // that is invoked when flush is completed.
  78   base::Closure flush_cb_;
  79
  80   // Audio/video configuration that applies to the next frame.
  81   ::media::AudioDecoderConfig audio_config_;
  82   ::media::VideoDecoderConfig video_config_;
  83
  84   base::WeakPtr<DemuxerStreamAdapter> weak_this_;
  85   base::WeakPtrFactory<DemuxerStreamAdapter> weak_factory_;
  86
  87   DISALLOW_COPY_AND_ASSIGN(DemuxerStreamAdapter);
  88 };
  89
  90 }  // namespace media
  91 }  // namespace chromecast
  92
  93 #endif  // CHROMECAST_MEDIA_CMA_FILTERS_DEMUXER_STREAM_ADAPTER_H_