output/osx: implement 32 bit playback

NEWS

@@ -19,6 +19,7 @@ ver 0.17 (2011/??/??)
   - httpd: support for streaming to a DLNA client
   - openal: improve buffer cancellation
   - osx: allow user to specify other audio devices
+  - osx: implement 32 bit playback
   - raop: new output plugin
   - shout: add possibility to set url
   - roar: new output plugin for RoarAudio

src/output/osx_output_plugin.c

@@ -345,9 +345,13 @@ osx_output_open(struct audio_output *ao, struct audio_format *audio_format, GErr
 		stream_description.mBitsPerChannel = 16;
 		break;
 
+	case SAMPLE_FORMAT_S32:
+		stream_description.mBitsPerChannel = 32;
+		break;
+
 	default:
-		audio_format->format = SAMPLE_FORMAT_S16;
-		stream_description.mBitsPerChannel = 16;
+		audio_format->format = SAMPLE_FORMAT_S32;
+		stream_description.mBitsPerChannel = 32;
 		break;
 	}