KSMETHOD_STREAMALLOCATOR_ALLOC

The KSMETHOD_STREAMALLOCATOR_ALLOC method is used by a client to allocate a frame from the given allocator. The method returns STATUS_PENDING if no frames are currently available. Otherwise, the method returns a pointer to a frame.

For example, a kernel-mode client could use the following sample code to allocate a frame:

Remarks

Method.Identifier.Set = KSMETHODSETID_StreamAllocator;
Method.Identifier.Id = KSMETHOD_STREAMALLOCATOR_ALLOC;
Method.Flags = KSMETHOD_TYPE_WRITE;
DeviceIoControl(
 AllocatorHandle,
 IOCTL_KS_METHOD,
 &Method,
 sizeof(KSMETHOD),
 &Frame,
 sizeof(PVOID),
 &BytesReturned,
 &Overlapped);