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Apple Developer Documentation
https://developer.apple.com/documentation/audiotoolbox/1503207-audioqueuenewoutput
The run loop mode in which to invoke the callback function specified in the inCallbackProc parameter. Typically, you pass kCFRunLoopCommonModes or use NULL, which is equivalent. You can choose to create your own thread with your own run loops. For more information on run loops, see Run Loops and CFRunLoop.
objective c - CoreAudio AudioQueue callback function …
https://stackoverflow.com/questions/19434413/coreaudio-audioqueue-callback-function-never-called-no-errors-reported
I am trying to do a simple playback from a file functionality and it appears that my callback function is never called. It doesn't really make sense because all of the OSStatuses come back 0 and other numbers all appear correct as well (like the output packets read pointer from AudioFileReadPackets). Here is the setup:
Core Audio Essentials - Apple Developer
https://developer.apple.com/library/archive/documentation/MusicAudio/Conceptual/CoreAudioOverview/CoreAudioEssentials/CoreAudioEssentials.html
Define a callback function for managing audio queue buffers. The callback uses Audio File Services to read the file you want to play. Instantiate the playback audio queue using the AudioQueueNewOutput function. Listing 2-14 illustrates these steps: Listing 2-14 Creating an audio queue object
AudioFileStream, CFReadStream and AudioQu… - Apple Community
https://discussions.apple.com/thread/1629067
Once you do that all this callback should do is just accumulate the packets into a local buffer. Your callback "audio queue buffer available" will ready from the local buffer and copy that data over to the audio queue buffer. This killed me for days, but this is the only way I could get this working...and yes it actually works 🙂.
Audio Queue example · GitHub
https://gist.github.com/andormade/1360885/6b239efc7bc59a7dd038b9543b98bdd6afd40559
Audio Queue example. GitHub Gist: instantly share code, notes, and snippets.
Audio Queue example · GitHub
https://gist.github.com/1360885
Audio Queue example. GitHub Gist: instantly share code, notes, and snippets.
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