Inside Macintosh: Sound

State Blocks

The stateVars field of a compressed sound header contains a pointer to a state block, defined by the StateBlock data type.



 
TYPE StateBlock = 

RECORD

    stateVar:               ARRAY[0..stateBlockSize - 1] OF Integer;

END;

stateVar: An array of integers. This field contains state variables that need to be preserved across invocations of the compression algorithm. The size of this field is defined by a constant.



 
                    CONST

                        stateBlockSize                  = 64;