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

media/audio/mac/audio_manager_mac.cc

Index: media/audio/mac/audio_manager_mac.cc
===================================================================
--- media/audio/mac/audio_manager_mac.cc	(revision 86276)
+++ media/audio/mac/audio_manager_mac.cc	(working copy)
@@ -4,6 +4,7 @@
 
 #include <CoreAudio/AudioHardware.h>
 
+#include "base/stringprintf.h"
 #include "base/sys_info.h"
 #include "media/audio/fake_audio_input_stream.h"
 #include "media/audio/fake_audio_output_stream.h"
@@ -127,6 +128,21 @@
   // TODO(cpu): implement.
 }
 
+void AudioManagerMac::GetAudioInputDeviceNames(
+    AudioInputDeviceNames* device_names) {
+  // TODO(xians): query a full list of valid devices.
+  if (HasAudioInputDevices()) {
+    // Add the default device to the list.

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

Does this make sense in Mac?

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

We only prepend the default device to the list to display to the users.
This "Default" string is only used as the name of the default device in the
list, and when opening the device, we still use
kAudioHardwarePropertyDefaultOutputDevice.

+    // We use (device_name)_(index) to make up the unique_ids to identify the
+    // devices. For default device, the index is 0, so its unique_id is
+    // Default_0.
+    AudioInputDeviceName name;
+    name.device_name = AudioManagerBase::kDefaultDeviceName;
+    name.unique_id = StringPrintf("%s_0", AudioManagerBase::kDefaultDeviceName);
+    device_names->push_back(name);
+  }
+}
+
 // Called by the stream when it has been released by calling Close().
 void AudioManagerMac::ReleaseOutputStream(AudioOutputStream* stream) {
   DCHECK(stream);