public static CMBufferQueue FromCallbacks(int count, CMBufferGetTime getDecodeTimeStamp, CMBufferGetTime getPresentationTimeStamp, CMBufferGetTime getDuration,
CMBufferGetBool isDataReady, CMBufferCompare compare, NSString dataBecameReadyNotification, CMBufferGetSize getTotalSize)
{
var bq = new CMBufferQueue(count);
var cbacks = new CMBufferCallbacks()
{
version = (uint)(getTotalSize == null ? 0 : 1),
refcon = GCHandle.ToIntPtr(bq.gch),
XgetDecodeTimeStamp = getDecodeTimeStamp == null ? (BufferGetTimeCallback)null : GetDecodeTimeStamp,
XgetPresentationTimeStamp = getPresentationTimeStamp == null ? (BufferGetTimeCallback)null : GetPresentationTimeStamp,
XgetDuration = getDuration == null ? (BufferGetTimeCallback)null : GetDuration,
XisDataReady = isDataReady == null ? (BufferGetBooleanCallback)null : GetDataReady,
Xcompare = compare == null ? (BufferCompareCallback)null : Compare,
cfStringPtr_dataBecameReadyNotification = dataBecameReadyNotification == null ? IntPtr.Zero : dataBecameReadyNotification.Handle,
XgetSize = getTotalSize == null ? (BufferGetSizeCallback)null : GetTotalSize
};
bq.getDecodeTimeStamp = getDecodeTimeStamp;
bq.getPresentationTimeStamp = getPresentationTimeStamp;
bq.getDuration = getDuration;
bq.isDataReady = isDataReady;
bq.compare = compare;
bq.getTotalSize = getTotalSize;
if (CMBufferQueueCreate(IntPtr.Zero, count, cbacks, out bq.handle) == 0)
{
return(bq);
}
bq.Dispose();
return(null);
}
public static CMBufferQueue CreateUnsorted(int count)
{
var bq = new CMBufferQueue(count);
// note: different version of iOS can return a different (size) structure, e.g. iOS 7.1,
// that structure might not map to our `CMBufferCallbacks2` managed representation
// and can cause a crash, e.g. bug #17330
// since we don't need the managed bcallbacks (it's the native callback that will be used for this queue)
// then we can simply use an IntPtr to represent them (no GCHandle)
var callbacks = CMBufferQueueGetCallbacksForUnsortedSampleBuffers();
if (CMBufferQueueCreate(IntPtr.Zero, count, callbacks, out bq.handle) == 0)
{
return(bq);
}
return(null);
}