157 

   158 /*

   159 // http://stackoverflow.com/questions/287543/how-to-programatically-sense-the-iphone-mute-switch

   160 BOOL isAppleDeviceMuted(void) {

   161     if (!gAudioSessionInited) {

   162         AudioSessionInterruptionListener inInterruptionListener = NULL;

   163         OSStatus error;

   164         if ((error = AudioSessionInitialize(NULL, NULL, inInterruptionListener, NULL)))

   165             DLog(@"*** Error *** error in AudioSessionInitialize: %d", error);

   166         else

   167             gAudioSessionInited = YES;

   168     }

   169     UInt32 propertySize = sizeof(CFStringRef);

   170     BOOL muteResult = NO;

   171 

   172     // this checks if there is volume

   173     Float32 volume;

   174     OSStatus n = AudioSessionGetProperty(kAudioSessionProperty_CurrentHardwareOutputVolume, &propertySize, &volume);

   175     if (n != 0)

   176         DLog( @"AudioSessionGetProperty 'volume': %d", n );

   177     BOOL volumeResult = (volume == 0.0f);

   178     

   179     // this checks if the device is muted

   180     CFStringRef state;

   181     n = AudioSessionGetProperty(kAudioSessionProperty_AudioRoute, &propertySize, &state);

   182     if (n != 0)

   183         DLog( @"AudioSessionGetProperty 'audioRoute': %d", n );

   184     else {

   185         NSString *result = (NSString *)state;

   186         muteResult = ([result length] == 0);

   187         releaseAndNil(result);

   188     }

   189     return volumeResult || muteResult;

   190 }

   191 */