Mode2FormedSubheader Struct Reference

Mode 2 Formed (Form1 or Form2) Sub-header structure. More...

Public Attributes
byte	BlockType
	Mode 2 block type.
byte	ChannelNumber
	Playback channel selection.
byte	CodingInformation
	Coding Information.
byte	FileNumber
	Identifies the file to which the block belongs.

Detailed Description

Mode 2 Formed (Form1 or Form2) Sub-header structure.

Two copies of the Mode 2 sub-header are stored in the first 8 bytes of every Mode2 Form1 or Mode2 Form2 (also known as Mode2 Formed) sectors. The sub-header keeps information about the sector type and the type of data stored in the sector. Mode 2 sectors are used primarily in Video CD (VCD) and Super Video CD ((S)VCD) applications but also could be used to store any kind of data.

Structure of Mode 2 Form1 block:

4 bytes	Mode 2 Formed Sector Sub-header structure first copy.
4 bytes	Mode 2 Formed Sector Sub-header structure second copy.
2048 bytes	User data.
280 bytes	EDC/ECC checksums. The EDC/ECC bytes should be allocated and set to zero from the application. The device and the engine calculate and fill in the EDC/ECC data during the burning process.

Structure of Mode 2 Form2 block:

4 bytes	Mode 2 Formed Sector Sub-header structure first copy.
4 bytes	Mode 2 Formed Sector Sub-header structure second copy.
2324 bytes	User data.
4 bytes	CRC. The CRC bytes should be allocated and set to zero from the application. The device and the engine calculate and fill in the correct CRC bytes during the burning process.

See also

Mode2BlockType

Member Data Documentation

BlockType

byte BlockType

Mode 2 block type.

This is a combination of flags defined in the Mode2BlockType enumeration. See the Mode2BlockType enumeration for more details

CodingInformation

byte CodingInformation

Coding Information.

This member should be set to 0