fix non working optical audio out on mac os lion

Signed-off-by: Felix Paul Kühne <fkuehne@videolan.org>

modules/audio_output/auhal.c

@@ -631,12 +631,15 @@ static int OpenSPDIF( aout_instance_t * p_aout )
     }
 
     /* Set mixable to false if we are allowed to */
-    AudioObjectPropertyAddress audioDeviceSupportsMixingAddress = { kAudioDevicePropertySupportsMixing , kAudioDevicePropertyScopeOutput, kAudioObjectPropertyElementMaster };
+    AudioObjectPropertyAddress audioDeviceSupportsMixingAddress = { kAudioDevicePropertySupportsMixing , kAudioObjectPropertyScopeGlobal, kAudioObjectPropertyElementMaster };
+    
+    if( AudioObjectHasProperty( p_sys->i_selected_dev, &audioDeviceSupportsMixingAddress ) )
+    {
         err = AudioObjectIsPropertySettable( p_sys->i_selected_dev, &audioDeviceSupportsMixingAddress, &b_writeable );
         err = AudioObjectGetPropertyDataSize( p_sys->i_selected_dev, &audioDeviceSupportsMixingAddress, 0, NULL, &i_param_size );
         err = AudioObjectGetPropertyData( p_sys->i_selected_dev, &audioDeviceSupportsMixingAddress, 0, NULL, &i_param_size, &b_mix );
         
-    if( !err && b_writeable )
+        if( err == noErr && b_writeable )
         {
             b_mix = 0;
             err = AudioObjectSetPropertyData( p_sys->i_selected_dev, &audioDeviceSupportsMixingAddress, 0, NULL, i_param_size, &b_mix );
@@ -648,6 +651,7 @@ static int OpenSPDIF( aout_instance_t * p_aout )
             msg_Err( p_aout, "failed to set mixmode: [%4.4s]", (char *)&err );
             return false;
         }
+    }
 
     /* Get a list of all the streams on this device */
     AudioObjectPropertyAddress streamsAddress = { kAudioDevicePropertyStreams, kAudioDevicePropertyScopeOutput, kAudioObjectPropertyElementMaster };
@@ -1171,7 +1175,7 @@ static int AudioStreamChangeFormat( aout_instance_t *p_aout, AudioStreamID i_str
     OSStatus            err = noErr;
     UInt32              i_param_size = 0;
 
-    AudioObjectPropertyAddress physicalFormatAddress = { kAudioStreamPropertyPhysicalFormat, kAudioDevicePropertyScopeOutput, kAudioObjectPropertyElementMaster };
+    AudioObjectPropertyAddress physicalFormatAddress = { kAudioStreamPropertyPhysicalFormat, kAudioObjectPropertyScopeGlobal, kAudioObjectPropertyElementMaster };
 
     struct { vlc_mutex_t lock; vlc_cond_t cond; } w;