CAAudioUnit fails Initialization
CAAudioUnit fails Initialization
- Subject: CAAudioUnit fails Initialization
- From: Craig Hopson <email@hidden>
- Date: Wed, 26 Apr 2006 16:12:16 -0600
Hopefully this is an easy one... ...with apologies because it
probably has been asked before...
I am trying to use a matrix mixer as follows:
***************** in the header *******************
CAAudioUnit mMixer;
CAStreamBasicDescription* mStreamDesc;
****************************************************
ComponentResult result = noErr;
UInt32 size;
bool canDo;
int numInputChans = 2;
int numOutputChans = 1;
// create the stream description
mStreamDesc = new CAStreamBasicDescription();
mStreamDesc->SetCanonical( kNumberChannels, false ); //
kNumberChannels == 2
mStreamDesc->mSampleRate = inSampleRate;
// load our mixer unit
CAComponentDescription desc = CAComponentDescription(
kAudioUnitType_Mixer,
kAudioUnitSubType_MatrixMixer,
kAudioUnitManufacturer_Apple );
CAComponent mixerComp( desc );
XThrowIf( !mixerComp.IsValid(), 0, "Failed to load Mixer Component" );
require_noerr( result = CAAudioUnit::Open( mixerComp, mMixer ),
bailOnErr );
// result = noErr;
#if DEBUG
mMixer.Print(); // looks like the right stuff
#endif
require_noerr( result = mMixer.Uninitialize(), bailOnErr ); // just
in case...
// result == noErr;
require_noerr( result = mMixer.SetFormat( kAudioUnitScope_Input, 0,
*mStreamDesc ), bailOnErr );
// result == noErr;
require_noerr( result = mMixer.SetFormat( kAudioUnitScope_Output, 0,
*mStreamDesc ), bailOnErr );
// result == noErr;
canDo = mMixer.CanDo( numInputChans, numOutputChans );
// canDo == true;
require_noerr( result = mMixer.Initialize(), bailOnErr );
// result == -10875: kAudioUnitErr_FailedInitialization
What am I missing? What (other) properties must be set in the mixer
AU before it can be initialized?
Thanks,
Craig Hopson
Red Rock Software
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Coreaudio-api mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden