Adding GetAudioInputDeviceNames() to AudioManager, which allows for device enumeration.

The current version only supports the default device and isn't fully implemented for Mac/Windows yet.

Patch by xians@chromium.org:
http://codereview.chromium.org/7060011/

BUG=none
TEST=media_unittests

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@87493 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 15 insertions, 0 deletions

diff --git a/media/audio/mac/audio_manager_mac.cc b/media/audio/mac/audio_manager_mac.cc
index 8b2c918..84d5fee 100644
--- a/media/audio/mac/audio_manager_mac.cc
+++ b/media/audio/mac/audio_manager_mac.cc
@@ -81,6 +81,20 @@ bool AudioManagerMac::HasAudioInputDevices() {
   return HasAudioHardware(kAudioHardwarePropertyDefaultInputDevice);
 }
 
+void AudioManagerMac::GetAudioInputDeviceNames(
+    media::AudioDeviceNames* device_names) {
+  // TODO(xians): query a full list of valid devices.
+  if (HasAudioInputDevices()) {
+    // Add the default device to the list.
+    // We use index 0 to make up the unique_id to identify the
+    // default devices.
+    media::AudioDeviceName name;
+    name.device_name = AudioManagerBase::kDefaultDeviceName;
+    name.unique_id = "0";
+    device_names->push_back(name);
+  }
+}
+
 AudioOutputStream* AudioManagerMac::MakeAudioOutputStream(
     AudioParameters params) {
   if (!params.IsValid())
diff --git a/media/audio/mac/audio_manager_mac.h b/media/audio/mac/audio_manager_mac.h
index 1977bac..2556aec 100644
--- a/media/audio/mac/audio_manager_mac.h
+++ b/media/audio/mac/audio_manager_mac.h
@@ -21,6 +21,7 @@ class AudioManagerMac : public AudioManagerBase {
   // Implementation of AudioManager.
   virtual bool HasAudioOutputDevices();
   virtual bool HasAudioInputDevices();
+  virtual void GetAudioInputDeviceNames(media::AudioDeviceNames* device_names);
   virtual AudioOutputStream* MakeAudioOutputStream(AudioParameters params);
   virtual AudioInputStream* MakeAudioInputStream(AudioParameters params);
   virtual void MuteAll();