Home | History | Annotate | Download | only in filters 
      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_
     99