Adding GetAudioInputDeviceNames to AudioManager, this function is supposed to do device enumerati...

media/audio/audio_manager_base.h

 // Copyright (c) 2010 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 "base/threading/thread.h"
 #include "media/audio/audio_manager.h"
 
 class AudioOutputDispatcher;
 
 // AudioManagerBase provides AudioManager functions common for all platforms.
 class AudioManagerBase : public AudioManager {
  public:
+  // Name of the generic "default" device.
+  static const char kDefaultDeviceName[];

[awong, 2011/05/23 17:36:15]

"default" isn't cross platform...is the AudioManagerBase comment incorrect?

[xians, 2011/05/23 20:15:59]

Sorry, I should have written more comments here.
It is actually the design. For all the platforms, we always prepend the default
device to the list, and use this default device if the users do not explicitly
choose another device for the call. So this string is mainly used as a display
name to the users. And we dont use it to open the device.

+
   AudioManagerBase();
 
   virtual void Init();
   virtual void Cleanup();
 
   virtual MessageLoop* GetMessageLoop();
 
   virtual string16 GetAudioInputDeviceModel();
 
   virtual bool CanShowAudioInputSettings();
   virtual void ShowAudioInputSettings();
 
+  virtual void GetAudioInputDeviceNames(AudioInputDeviceNames* device_names);
+
   virtual AudioOutputStream* MakeAudioOutputStreamProxy(
       const AudioParameters& params);
 
  protected:
   virtual ~AudioManagerBase();
 
   typedef std::map<AudioParameters, scoped_refptr<AudioOutputDispatcher>,
                    AudioParameters::Compare>
       AudioOutputDispatchersMap;
 
   bool initialized() { return initialized_; }
 
   // Thread used to interact with AudioOutputStreams created by this
   // audio manger.
   base::Thread audio_thread_;
 
   bool initialized_;
 
   AudioOutputDispatchersMap output_dispatchers_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioManagerBase);
 };
 
 #endif  // MEDIA_AUDIO_AUDIO_MANAGER_BASE_H_