Callback interface for the Microsoft Media Foundation sink writer.
interface IMFSinkWriterCallback : public IUnknown
Implement this interface if you use the IMFSinkWriter interface and want to receive asynchronous notifications.
Set the callback pointer by setting the MF_SINK_WRITER_ASYNC_CALLBACK attribute when you first create the sink writer.
The callback methods can be called from any thread, so an object that implements this interface must be thread-safe.
This interface is available on Windows Vista if Platform Update Supplement for Windows Vista is installed.
Header: Declared in mfreadwrite.h.