media/filters/fake_video_decoder.h

   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 MEDIA_FILTERS_FAKE_VIDEO_DECODER_H_
   6 #define MEDIA_FILTERS_FAKE_VIDEO_DECODER_H_
   7
   8 #include <list>
   9
  10 #include "base/bind.h"
  11 #include "base/callback.h"
  12 #include "base/callback_helpers.h"
  13 #include "base/memory/weak_ptr.h"
  14 #include "media/base/callback_holder.h"
  15 #include "media/base/decoder_buffer.h"
  16 #include "media/base/pipeline_status.h"
  17 #include "media/base/video_decoder.h"
  18 #include "media/base/video_decoder_config.h"
  19 #include "media/base/video_frame.h"
  20 #include "ui/gfx/size.h"
  21
  22 using base::ResetAndReturn;
  23
  24 namespace base {
  25 class MessageLoopProxy;
  26 }
  27
  28 namespace media {
  29
  30 class FakeVideoDecoder : public VideoDecoder {
  31  public:
  32   // Constructs an object with a decoding delay of |decoding_delay| frames.
  33   explicit FakeVideoDecoder(int decoding_delay);
  34   virtual ~FakeVideoDecoder();
  35
  36   // VideoDecoder implementation.
  37   virtual void Initialize(const VideoDecoderConfig& config,
  38                           const PipelineStatusCB& status_cb) OVERRIDE;
  39   virtual void Decode(const scoped_refptr<DecoderBuffer>& buffer,
  40                       const DecodeCB& decode_cb) OVERRIDE;
  41   virtual void Reset(const base::Closure& closure) OVERRIDE;
  42   virtual void Stop(const base::Closure& closure) OVERRIDE;
  43
  44   // Holds the next init/read/reset/stop callback from firing.
  45   void HoldNextInit();
  46   void HoldNextRead();
  47   void HoldNextReset();
  48   void HoldNextStop();
  49
  50   // Satisfies the pending init/read/reset/stop callback, which must be ready
  51   // to fire when these methods are called.
  52   void SatisfyInit();
  53   void SatisfyRead();
  54   void SatisfyReset();
  55   void SatisfyStop();
  56
  57   int total_bytes_decoded() const { return total_bytes_decoded_; }
  58
  59  private:
  60   enum State {
  61     UNINITIALIZED,
  62     NORMAL
  63   };
  64
  65   // Callback for updating |total_bytes_decoded_|.
  66   void OnFrameDecoded(int buffer_size,
  67                       const DecodeCB& read_cb,
  68                       Status status,
  69                       const scoped_refptr<VideoFrame>& video_frame);
  70
  71   void DoReset();
  72   void DoStop();
  73
  74   scoped_refptr<base::MessageLoopProxy> message_loop_;
  75   base::WeakPtrFactory<FakeVideoDecoder> weak_factory_;
  76   base::WeakPtr<FakeVideoDecoder> weak_this_;
  77
  78   const int decoding_delay_;
  79
  80   State state_;
  81
  82   CallbackHolder<PipelineStatusCB> init_cb_;
  83   CallbackHolder<DecodeCB> decode_cb_;
  84   CallbackHolder<base::Closure> reset_cb_;
  85   CallbackHolder<base::Closure> stop_cb_;
  86
  87   VideoDecoderConfig current_config_;
  88
  89   std::list<scoped_refptr<VideoFrame> > decoded_frames_;
  90
  91   int total_bytes_decoded_;
  92
  93   DISALLOW_COPY_AND_ASSIGN(FakeVideoDecoder);
  94 };
  95
  96 }  // namespace media
  97
  98 #endif  // MEDIA_FILTERS_FAKE_VIDEO_DECODER_H_