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POAudioQueue | Change audio device while audioQueue is running
 

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    <p>i am using audio queue for playback and for record on OSX | Mac and have a use case,<br> Its something like, user may change the Audiodevice ( Input and output both ) while audio queue is running either for playback or for record, </p> <p>This is what i have done so far, </p> <pre><code>OSStatus result = noErr; // get the device list AudioObjectPropertyAddress thePropertyAddress = { kAudioHardwarePropertyDefaultOutputDevice, kAudioObjectPropertyScopeGlobal, kAudioObjectPropertyElementMaster }; UInt32 thePropSize; CFStringRef theDeviceName; // get the device name thePropSize = sizeof(CFStringRef); thePropertyAddress.mSelector = kAudioObjectPropertyName; thePropertyAddress.mScope = kAudioObjectPropertyScopeGlobal; thePropertyAddress.mElement = kAudioObjectPropertyElementMaster; // get the name of the device result = AudioObjectGetPropertyData( (AudioObjectID)input, &amp;thePropertyAddress, 0, NULL, &amp;thePropSize, &amp;theDeviceName); if ( result != noErr){ log("Error while getting property"); return; } // get the uid of the device CFStringRef theDeviceUID; thePropertyAddress.mSelector = kAudioDevicePropertyDeviceUID; result = AudioObjectGetPropertyData( (AudioObjectID)input, &amp;thePropertyAddress, 0, NULL, &amp;thePropSize, &amp;theDeviceUID); try{ XThrowIfError(AudioQueueSetProperty(mQueue,kAudioQueueProperty_CurrentDevice,&amp;theDeviceUID, sizeof(CFStringRef)),"set input device"); } catch (CAXException e) { char buf[256]; fprintf(stderr, "Error: %s (%s)\n", e.mOperation, e.FormatError(buf)); } </code></pre> <p>but its throwing an exception <strong>kAudioQueueErr_InvalidRunState</strong> , <a href="https://developer.apple.com/library/ios/documentation/MusicAudio/Reference/AudioQueueReference/Reference/reference.html#//apple_ref/doc/uid/TP40005117-CH5g-RCM0127" rel="nofollow">reference</a>saying its can't be done while queue is running; </p> <p>Is there any other way to achieve the same ? </p>
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