CMBufferQueueCreate fail, required parameters?
- by Agustin
Reading the documentation about iOS SDK CMBufferQueueCreate, it says that getDuration and version are required, all the others callbacks can be NULL.
but running the following code:
CFAllocatorRef allocator;
CMBufferCallbacks *callbacks;
callbacks = malloc(sizeof(CMBufferCallbacks));
callbacks->version = 0;
callbacks->getDuration = timeCallback;
callbacks->refcon = NULL;
callbacks->getDecodeTimeStamp = NULL;
callbacks->getPresentationTimeStamp = NULL;
callbacks->isDataReady = NULL;
callbacks->compare = NULL;
callbacks->dataBecameReadyNotification = NULL;
CMItemCount capacity = 4;
OSStatus s = CMBufferQueueCreate(allocator, capacity, callbacks, queue);
NSLog(@"QUEUE: %x", queue);
NSLog(@"STATUS: %i", s);
with timeCallback:
CMTime timeCallback(CMBufferRef buf, void *refcon){
return CMTimeMake(1, 1);
}
and queue is:
CMBufferQueueRef* queue;
queue creations fails (queue = 0) and returns a status of:
kCMBufferQueueError_RequiredParameterMissing = -12761,
The callbacks variable is correctly initialized, at least the debugger says so.
Somebody have played arround with CMBufferQueue? google doesn't know about that!
Thanks
