Move some generic functions to AudioManagerBase to be inherited by platform-specific AudioManager***

media/audio/win/audio_manager_win.h

 // Copyright (c) 2011 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_WIN_AUDIO_MANAGER_WIN_H_
 #define MEDIA_AUDIO_WIN_AUDIO_MANAGER_WIN_H_
 
 #include <windows.h>
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/gtest_prod_util.h"
 #include "media/audio/audio_manager_base.h"
 
 class PCMWaveOutAudioOutputStream;
 
 // Windows implementation of the AudioManager singleton. This class is internal
 // to the audio output and only internal users can call methods not exposed by
 // the AudioManager class.
 class MEDIA_EXPORT AudioManagerWin : public AudioManagerBase {
  public:
   AudioManagerWin();
   // Implementation of AudioManager.
   virtual bool HasAudioOutputDevices() OVERRIDE;
   virtual bool HasAudioInputDevices() OVERRIDE;
-  virtual AudioOutputStream* MakeAudioOutputStream(
-      const AudioParameters& params) OVERRIDE;
-  virtual AudioInputStream* MakeAudioInputStream(
-      const AudioParameters& params, const std::string& device_id) OVERRIDE;
   virtual void MuteAll() OVERRIDE;
   virtual void UnMuteAll() OVERRIDE;
   virtual string16 GetAudioInputDeviceModel() OVERRIDE;
   virtual bool CanShowAudioInputSettings() OVERRIDE;
   virtual void ShowAudioInputSettings() OVERRIDE;
   virtual void GetAudioInputDeviceNames(media::AudioDeviceNames* device_names)
       OVERRIDE;
 
-  // Windows-only methods to free a stream created in MakeAudioStream. These
-  // are called internally by the audio stream when it has been closed.
-  void ReleaseOutputStream(AudioOutputStream* stream);
-
-  // Called internally by the audio stream when it has been closed.
-  void ReleaseInputStream(AudioInputStream* stream);
+  // Implementation of AudioManagerBase.
+  virtual int GetMaxAudioOutputStreamsAllowed() OVERRIDE;
+  virtual AudioOutputStream* MakeAudioLinearOutputStream(
+      const AudioParameters& params) OVERRIDE;
+  virtual AudioOutputStream* MakeAudioLowLatencyOutputStream(
+      const AudioParameters& params) OVERRIDE;
+  virtual AudioInputStream* MakeAudioLinearInputStream(
+      const AudioParameters& params, const std::string& device_id) OVERRIDE;
+  virtual AudioInputStream* MakeAudioLowLatencyInputStream(
+        const AudioParameters& params, const std::string& device_id) OVERRIDE;
 
  protected:
   virtual ~AudioManagerWin();
 
  private:
   enum EnumerationType {
     kUninitializedEnumeration = 0,
     kMMDeviceEnumeration,
     kWaveEnumeration,
   };
 
   // Allow unit test to modify the utilized enumeration API.
   friend class AudioInputDeviceTest;
 
   EnumerationType enumeration_type_;
   EnumerationType enumeration_type() { return enumeration_type_; }
   void SetEnumerationType(EnumerationType type) {
     enumeration_type_ = type;
   }
 
-  // Number of currently open output streams.
-  int num_output_streams_;
-
   DISALLOW_COPY_AND_ASSIGN(AudioManagerWin);
 };
 
 #endif  // MEDIA_AUDIO_WIN_AUDIO_MANAGER_WIN_H_