Handle audio device changes on Mac

media/audio/mac/audio_manager_mac.cc

Index: media/audio/mac/audio_manager_mac.cc
diff --git a/media/audio/mac/audio_manager_mac.cc b/media/audio/mac/audio_manager_mac.cc
index a0562837d43ec7fbb82a408e7e5826b5e675505b..63a3e8d8aaf8021443507d10b3d4ca76c5bc317c 100644
--- a/media/audio/mac/audio_manager_mac.cc
+++ b/media/audio/mac/audio_manager_mac.cc
@@ -6,10 +6,12 @@
 
 #include <string>
 
+#include "base/bind.h"
 #include "base/command_line.h"
 #include "base/mac/mac_logging.h"
 #include "base/mac/scoped_cftyperef.h"
 #include "base/sys_string_conversions.h"
+#include "media/audio/mac/audio_device_listener_mac.h"
 #include "media/audio/mac/audio_input_mac.h"
 #include "media/audio/mac/audio_low_latency_input_mac.h"
 #include "media/audio/mac/audio_low_latency_output_mac.h"
@@ -17,6 +19,7 @@
 #include "media/audio/mac/audio_output_mac.h"
 #include "media/audio/mac/audio_synchronized_mac.h"
 #include "media/audio/mac/audio_unified_mac.h"
+#include "media/base/bind_to_loop.h"
 #include "media/base/limits.h"
 #include "media/base/media_switches.h"
 
@@ -232,6 +235,11 @@ static AudioDeviceID GetAudioDeviceIdByUId(bool is_input,
 
 AudioManagerMac::AudioManagerMac() {
   SetMaxOutputStreamsAllowed(kMaxOutputStreams);
+
+  output_device_listener_.reset(new AudioDeviceListenerMac(BindToLoop(

[DaleCurtis, 2012/10/29 01:58:45]

You need to do this in the InitializeOnAudioThread() method, you can't pass
"this" out to another thread during construction; it'll lead to races.

Which means you'll need to follow the same pattern as AUdioManagerWin to keep
thread checker happy.

[sail, 2012/10/29 04:21:46]

Done.

+      GetMessageLoop(),
+      base::Bind(&AudioManagerMac::NotifyAllOutputDeviceChangeListeners,
+                 base::Unretained(this)))));
 }
 
 AudioManagerMac::~AudioManagerMac() {