Tab Audio Mirroring: WebContentsAudioInputStream is a new implementation which represents the lifet…

media/audio/audio_manager_base.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_AUDIO_AUDIO_MANAGER_BASE_H_
 #define MEDIA_AUDIO_AUDIO_MANAGER_BASE_H_
 
 #include <map>
 #include <string>
 #include <utility>
@@ skipping 10 matching lines @@
 #endif
 
 namespace base {
 class Thread;
 }
 
 namespace media {
 
 class AudioOutputDispatcher;
 class VirtualAudioInputStream;
+class VirtualAudioOutputStream;
 
 // AudioManagerBase provides AudioManager functions common for all platforms.
 class MEDIA_EXPORT AudioManagerBase : public AudioManager {
  public:
   // Name of the generic "default" device.
   static const char kDefaultDeviceName[];
   // Unique Id of the generic "default" device.
   static const char kDefaultDeviceId[];
 
   virtual ~AudioManagerBase();
@@ skipping 16 matching lines @@
 
   virtual AudioOutputStream* MakeAudioOutputStreamProxy(
       const AudioParameters& params) OVERRIDE;
 
   virtual bool IsRecordingInProcess() OVERRIDE;
 
   // Called internally by the audio stream when it has been closed.
   virtual void ReleaseOutputStream(AudioOutputStream* stream);
   virtual void ReleaseInputStream(AudioInputStream* stream);
 
+  // Called internally by the browser-wide VirtualAudioInputStream after it has
+  // been closed.  Notifies all AudioDeviceListeners to re-create output
+  // streams and then deletes |stream|.
+  virtual void ReleaseVirtualInputStream(VirtualAudioInputStream* stream);
+  virtual void ReleaseVirtualOutputStream(VirtualAudioOutputStream* stream);
+
   void IncreaseActiveInputStreamCount();
   void DecreaseActiveInputStreamCount();
 
   // Creates the output stream for the |AUDIO_PCM_LINEAR| format. The legacy
   // name is also from |AUDIO_PCM_LINEAR|.
   virtual AudioOutputStream* MakeLinearOutputStream(
       const AudioParameters& params) = 0;
 
   // Creates the output stream for the |AUDIO_PCM_LOW_LATENCY| format.
   virtual AudioOutputStream* MakeLowLatencyOutputStream(
@@ skipping 87 matching lines @@
   // create all audio output streams as virtual streams so as to redirect audio
   // data to this virtual input stream.
   VirtualAudioInputStream* virtual_audio_input_stream_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioManagerBase);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_AUDIO_MANAGER_BASE_H_