Why did AudioQueueAllocateBuffer fail?

Question

Device: iPhone X

System: OS 15.1

I came across an error when using AudioQueue to play some data. The error is returned by this API and its value is -308.

OSStatus status = AudioQueueAllocateBuffer(_audioQueue, MIN_SIZE_PER_FRAME, &audioQueueBuffers[i]); 

After that, All the AudioQueue APIs will return the error -66671. The official documents define as below.

kAudioQueueErr_QueueInvalidated
In iOS, the audio server has exited, causing the audio queue to become invalid.

However, I have no idea what the audio server means. Could any guy tell me what had happened?

Answer 1

This problem may be caused by an abnormal shutdown of the media service。The solution is to destroy the audioQueue and recreate it when you got an error。 See https://developer.apple.com/forums/thread/693371。 Refer to the Apple Media Engineer's answers。