The MMCTOCENTRY Structure

The MMIO Manager uses the MMCTOCENTRY data structure to maintain state information on an open file. The MMCTOCENTRY data structure is defined in the MMIOOS2.H header file as shown.

typedef struct _MMCTOCENTRY  {
 ULONG    ulOffset;         /* Offset of element within CGRP       */
 ULONG    ulSize;           /* Size of element                     */
 ULONG    ulMedType;        /* FOURCC of element                   */
 ULONG    ulMedUsage;       /* Possible sub type                   */
 ULONG    ulCompressTech;   /* Compression technique used          */
 ULONG    ulUncompressBytes;/* Actual size of uncompressed element */
 } MMCTOCENTRY;