Apple

UInt32 numFrames = 4096; // 3756

AudioUnitSetProperty(outputUnit, kAudioUnitProperty_MaximumFramesPerSlice, kAudioUnitScope_Global, 0, &numFrames, sizeof(numFrames));

OSStatus status = AudioUnitRender(outputUnit, 0, timeStamp, 0, (UInt32)bufferLength, bufferList);

I no longer get the -10874 status error. But now I get a different error, kAudio_ParamError(-50)

The params appear OK so I'm not sure why this is happening.

(lldb) po outputUnit

0x00000000809c806a

(lldb) po timeStamp

0x00007fff5fbfeaa0

(lldb) po bufferLength

3756

(lldb) po bufferList

0x0000618000044e90

(lldb) po self.engine

________ GraphDescription ________

AVAudioEngineGraph 0x6100001c03c0: initialized = 1, running = 0, number of nodes = 4

******** output chain ********

node 0x6080000a12c0 {'auou' 'ahal' 'appl'}, 'I'

inputs = 1

(bus0) <- (bus0) 0x6100000c8ff0, {'aumx' 'mcmx' 'appl'}, [ 2 ch, 44100 Hz, 'lpcm' (0x00000029) 32-bit little-endian float, deinterleaved]

node 0x6100000c8ff0 {'aumx' 'mcmx' 'appl'}, 'I'

inputs = 1

(bus0) <- (bus0) 0x6000000c2a00, {'aufx' 'dist' 'appl'}, [ 2 ch, 44100 Hz, 'lpcm' (0x00000029) 32-bit little-endian float, deinterleaved]

outputs = 1

(bus0) -> (bus0) 0x6080000a12c0, {'auou' 'ahal' 'appl'}, [ 2 ch, 44100 Hz, 'lpcm' (0x00000029) 32-bit little-endian float, deinterleaved]

node 0x6000000c2a00 {'aufx' 'dist' 'appl'}, 'I'

inputs = 1

(bus0) <- (bus0) 0x6100001804e0, {'augn' 'sspl' 'appl'}, [ 2 ch, 44100 Hz, 'lpcm' (0x00000029) 32-bit little-endian float, deinterleaved]

outputs = 1

(bus0) -> (bus0) 0x6100000c8ff0, {'aumx' 'mcmx' 'appl'}, [ 2 ch, 44100 Hz, 'lpcm' (0x00000029) 32-bit little-endian float, deinterleaved]

node 0x6100001804e0 {'augn' 'sspl' 'appl'}, 'I'

outputs = 1

(bus0) -> (bus0) 0x6000000c2a00, {'aufx' 'dist' 'appl'}, [ 2 ch, 44100 Hz, 'lpcm' (0x00000029) 32-bit little-endian float, deinterleaved]

______________________________________

(lldb) po self.engine.outputNode

<AVAudioOutputNode: 0x600000000a00>

(lldb) po self.engine.outputNode.audioUnit

0x00000000809c806a

regards,

Michael

On Sat, Jul 2, 2016 at 4:37 PM, Mazzaroth M. <email@hidden> wrote:

I'm trying to covert some Objective-C offline render code from iOS 8 to macOS 10.11. However I'm getting a kAudioUnitErr_TooManyFramesToProcess(-10874) error when I call AudioUnitRender()

The error does not occur on iOS.

The (broken) code is available here.

https://bitbucket.org/sidha/offline-render-mac/src/cc3ba589565bf97d3700e91ef7b1e7806c6c9298/OfflineRender/ViewController.m?at=master&fileviewer=file-view-default#ViewController.m-229

Any ideas?
Michael

References:
	>AudioUnitRender results in kAudioUnitErr_TooManyFramesToProcess (From: "Mazzaroth M." <email@hidden>)