Inside Macintosh: Sound /

Chapter 2 - Sound Manager / Sound Manager Reference

Data Structures

Chunk Headers

Every chunk in an AIFF or AIFF-C file contains a chunk header that defines characteristics of the chunk. The ChunkHeader data type defines a chunk header.

TYPE ChunkHeader =
RECORD
   ckID:    ID;         {chunk type ID}
   ckSize:  LongInt;    {number of bytes of data}
END;

Field Description

ckID

The ID of the chunk. An ID is a 32-bit concatenation of any four printable ASCII characters in the range ' ' (space character, ASCII value $20) through '~' (ASCII value $7E). Spaces cannot precede printing characters, but trailing spaces are allowed. Control characters are not allowed. See "Chunk IDs" on page 2-98 for a list of the currently recognized chunk IDs.

ckSize

The size of the chunk in bytes, not including the ckID and ckSize fields.