coreaudio_sys::audio_unit::AudioUnitRenderProc

type AudioUnitRenderProc = Option<extern fn(inComponentStorage: *mut c_void, ioActionFlags: *mut AudioUnitRenderActionFlags, inTimeStamp: *const AudioTimeStamp, inOutputBusNumber: UInt32, inNumberFrames: UInt32, ioData: *mut AudioBufferList) -> OSStatus>;