it is not supported and simplify validity check.
Initialize the buffer format, and only from the fields we checked.
DirectSoundCreate8 fully initializes the buffer format (just in case).
separate files. Split primary buffer and secondary buffer interfaces
into separate implementations. Made the primary buffer state part of
the dsound object, so primary buffer objects can be created and
refcounted independently. Made the interfaces follow COM aggregation
rules more closely. Converted the dsound critical section to a R/W
lock to improve potential remixing concurrency. Fixed various bugs and
refcounting issues.
Francois Gouget