Reland: Add Stop() to AudioDecoder. (https://codereview.chromium.org/126793002/)

media/filters/decrypting_audio_decoder.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MEDIA_FILTERS_DECRYPTING_AUDIO_DECODER_H_
 #define MEDIA_FILTERS_DECRYPTING_AUDIO_DECODER_H_
 
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 30 matching lines @@
       const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
       const SetDecryptorReadyCB& set_decryptor_ready_cb);
   virtual ~DecryptingAudioDecoder();
 
   // AudioDecoder implementation.
   virtual void Initialize(DemuxerStream* stream,
                           const PipelineStatusCB& status_cb,
                           const StatisticsCB& statistics_cb) OVERRIDE;
   virtual void Read(const ReadCB& read_cb) OVERRIDE;
   virtual void Reset(const base::Closure& closure) OVERRIDE;
+  virtual void Stop(const base::Closure& closure) OVERRIDE;
   virtual int bits_per_channel() OVERRIDE;
   virtual ChannelLayout channel_layout() OVERRIDE;
   virtual int samples_per_second() OVERRIDE;
 
  private:
   // For a detailed state diagram please see this link: http://goo.gl/8jAok
   // TODO(xhwang): Add a ASCII state diagram in this file after this class
   // stabilizes.
   // TODO(xhwang): Update this diagram for DecryptingAudioDecoder.
   enum State {
     kUninitialized = 0,
     kDecryptorRequested,
     kPendingDecoderInit,
     kIdle,
     kPendingConfigChange,
     kPendingDemuxerRead,
     kPendingDecode,
     kWaitingForKey,
     kDecodeFinished,
+    kStopped,
   };
 
   // Callback for DecryptorHost::RequestDecryptor().
   void SetDecryptor(Decryptor* decryptor);
 
   // Callback for Decryptor::InitializeAudioDecoder() during initialization.
   void FinishInitialization(bool success);
 
   // Callback for Decryptor::InitializeAudioDecoder() during config change.
   void FinishConfigChange(bool success);
@@ skipping 28 matching lines @@
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
   base::WeakPtrFactory<DecryptingAudioDecoder> weak_factory_;
   base::WeakPtr<DecryptingAudioDecoder> weak_this_;
 
   State state_;
 
   PipelineStatusCB init_cb_;
   StatisticsCB statistics_cb_;
   ReadCB read_cb_;
   base::Closure reset_cb_;
+  base::Closure stop_cb_;
 
   // Pointer to the demuxer stream that will feed us compressed buffers.
   DemuxerStream* demuxer_stream_;
 
   // Callback to request/cancel decryptor creation notification.
   SetDecryptorReadyCB set_decryptor_ready_cb_;
 
   Decryptor* decryptor_;
 
   // The buffer returned by the demuxer that needs decrypting/decoding.
@@ skipping 14 matching lines @@
   int samples_per_second_;
 
   scoped_ptr<AudioTimestampHelper> timestamp_helper_;
 
   DISALLOW_COPY_AND_ASSIGN(DecryptingAudioDecoder);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_DECRYPTING_AUDIO_DECODER_H_