This structure contains information used on MMIOM_COMPRESS and MMIOM_CODEC_COMPRESS messages.
typedef struct _MMCOMPRESS { ULONG ulStructLen; /* Length of this structure. */ ULONG ulFlags; /* Command and status flags. */ ULONG ulSrcBufLen; /* Source buffer size. */ PVOID pSrcBuf; /* Source buffer. */ ULONG ulDstBufLen; /* Destination buffer length. */ PVOID pDstBuf; /* Destination buffer. */ PVOID pRunTimeInfo; /* Control information. */ } MMCOMPRESS; typedef MMCOMPRESS * PMMCOMPRESS ;