CDROM_TOC_ATIP_DATA_BLOCK structure (ntddcdrm.h)

Device control IRPs with a control code of IOCTL_CDROM_READ_TOC_EX and a format of CDROM_READ_TOC_EX_FORMAT_ATIP return their output data in a header structure of type CDROM_TOC_ATIP_DATA followed by a series of ATIP data block descriptors defined by CDROM_TOC_ATIP_DATA_BLOCK.

Syntax

typedef struct _CDROM_TOC_ATIP_DATA_BLOCK {
  UCHAR CdrwReferenceSpeed : 3;
  UCHAR Reserved3 : 1;
  UCHAR WritePower : 3;
  UCHAR True1 : 1;
  UCHAR Reserved4 : 6;
  UCHAR UnrestrictedUse : 1;
  UCHAR Reserved5 : 1;
  UCHAR A3Valid : 1;
  UCHAR A2Valid : 1;
  UCHAR A1Valid : 1;
  UCHAR DiscSubType : 3;
  UCHAR IsCdrw : 1;
  UCHAR True2 : 1;
  UCHAR Reserved7;
  UCHAR LeadInMsf[3];
  UCHAR Reserved8;
  UCHAR LeadOutMsf[3];
  UCHAR Reserved9;
  UCHAR A1Values[3];
  UCHAR Reserved10;
  UCHAR A2Values[3];
  UCHAR Reserved11;
  UCHAR A3Values[3];
  UCHAR Reserved12;
} CDROM_TOC_ATIP_DATA_BLOCK, *PCDROM_TOC_ATIP_DATA_BLOCK;

Members

CdrwReferenceSpeed

Indicates the recommended write speed for the media. Values 0x00 to 0x01 are reserved. A value of 0x02 indicates a CD-ROM speed of 4X. A value of 0x03 indicates a CD-ROM speed of 8X. Values 0x04 to 0x07 are reserved.

Reserved3

Reserved.

WritePower

Indicates media's recommended initial laser power setting. The high order bit must be set to 1. The setting of the other bits varies between CD-R and CD-RW media. For an explanation of the values these bits can have, see the SCSI Multimedia Commands - 3 (MMC-3) specification.

True1

Must be set to 1.

Reserved4

Reserved.

UnrestrictedUse

Indicates, when set to 1, that the mounted disc is defined for unrestricted use. When set to zero, indicates that the mounted disc is defined for restricted use.

Reserved5

Reserved.

A3Valid

Indicates that bytes 16-18 (bytes 12-14 of the ATIP descriptor) are valid when set to 1. When set to zero, indicates that bytes 16-18 are invalid.

A2Valid

Indicates that A2 values field is valid when set to 1. When set to zero, indicates that the A2 values field is invalid.

A1Valid

Indicates that A3 values field is valid when set to 1. When set to zero, indicates that the A3 values field is invalid.

DiscSubType

Must be set to zero.

IsCdrw

Indicates the media is rewritable (CD-RW) when set to 1. When set to zero, indicates the media is write-once (CD-R).

True2

Must be set to 1.

Reserved7

Reserved.

LeadInMsf[3]

Indicates the ATIP start time of lead-in, in terms of minutes, seconds, and frames. Valid values of the first byte are from 0x50 to 0x63. For an explanation of the values that the second and third bytes can have, see the SCSI Multimedia Commands - 3 (MMC-3) specification.

Reserved8

Reserved.

LeadOutMsf[3]

Indicates the ATIP last possible start time of lead-out in terms of minutes, seconds, and frames. Valid values of the first byte are from 0x0 to 0x04F. For an explanation of the values that the second and third bytes can have, see the SCSI Multimedia Commands - 3 (MMC-3) specification.

Reserved9

Reserved.

A1Values[3]

See specification T10/1363-D, by National Committee for Information Technology Standards (NCITS) For information about the permissible values for this member.

Reserved10

Reserved.

A2Values[3]

Reserved.

Reserved11

Reserved.

A3Values[3]

Reserved.

Reserved12

Reserved.

Requirements

Requirement	Value
Header	ntddcdrm.h (include Ntddcdrm.h)

See also

CDROM_READ_TOC_EX

CDROM_TOC_ATIP_DATA

IOCTL_CDROM_READ_TOC_EX