// ntddcdrm.h

typedef struct _SUB_Q_MEDIA_CATALOG_NUMBER {
  SUB_Q_HEADER Header;
  UCHAR        FormatCode;
  UCHAR        Reserved[3];
  UCHAR        Reserved1 : 7;
  UCHAR        Mcval : 1;
  UCHAR        MediaCatalog[15];
} SUB_Q_MEDIA_CATALOG_NUMBER, *PSUB_Q_MEDIA_CATALOG_NUMBER;
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Windows Driver Kit DDI reference (ns-ntddcdrm-_sub_q_media_catalog_number)

_SUB_Q_MEDIA_CATALOG_NUMBER structure

Description

The SUB_Q_MEDIA_CATALOG_NUMBER structure contains position information and is used in conjunction with the SUB_Q_CHANNEL_DATA structure.

Members

`Header`

Indicates, among other things, the length of the Q subchannel data that was retrieved. See SUB_Q_HEADER for further details.

`FormatCode`

Should have a value of IOCTL_CDROM_MEDIA_CATALOG.

`Reserved`

Reserved.

`Reserved1`

Reserved.

`Mcval`

Indicates that the media catalog number (MCN) data is valid if set to 1; set to zero otherwise.

`MediaCatalog`

Contains the catalog number if Mcval is set to 1.

SUB_Q_MEDIA_CATALOG_NUMBER - NtDoc