This structure contains information that is used to open a CODEC. It describes the source and destination data format, as well as control and CODEC-specific information to indicate the operation of the CODEC. This structure is used on the MMIOM_CODEC_OPEN message.
typedef struct _CODECOPEN {
ULONG ulFlags; /* Commands to CODEC Proc. */
PVOID pControlHdr; /* CODEC control parameters. */
PVOID pSrcHdr; /* Source header. */
PVOID pDstHdr; /* Destination header. */
PVOID pOtherInfo; /* Pointer to MMVIDEOPEN. */
} CODECOPEN;
typedef CODECOPEN * PCODECOPEN ;