AudioQueueGetParameter(_:_:_:)
Gets an audio queue parameter value.
Declaration
func AudioQueueGetParameter(_ inAQ: AudioQueueRef, _ inParamID: AudioQueueParameterID, _ outValue: UnsafeMutablePointer<AudioQueueParameterValue>) -> OSStatusParameters
- inAQ:
The audio queue that you want to get a parameter value from.
- inParamID:
The ID of the parameter whose value you want to get. In OS X v10.5, audio queues have one parameter available:
kAudioQueueParam_Volume, which controls playback gain. See 1552626 Audio Queue Parameters - outValue:
On output, points to the current value of the specified parameter.
Return Value
A result code. See Result Codes.
Discussion
You can access the current parameter values for an audio queue at any time with this function. An audio queue parameter value is the sum of settings applied at buffer granularity, using the AudioQueueEnqueueBufferWithParameters(_:_:_:_:_:_:_:_:_:_:) function, and settings applied to the audio queue per se, using the AudioQueueSetParameter(_:_:_:) function.