#ifndef IFF_8SVX_H
#define IFF_8SVX_H

/*-------------------------------------------------------------------*/
/* IFF_8SVX.H   Definitions for 8-Bit Sampled Voice                  */
/*-------------------------------------------------------------------*/


#define ID_8SVX MakeID('8', 'S', 'V', 'X')
#define ID_VHDR MakeID('V', 'H', 'D', 'R')

typedef LONG Fixed;   /* A fixed-point value, 16 bits to the left 
          * of the point and 16 to the right. A Fixed 
          * is a number of 216ths, i.e. 65536ths. */

#define Unity 0x10000L   /* Unity = Fixed 1.0 = maximum volume   */

/* sCompression: Choice of compression algorithm applied to the samples   */ 

#define sCmpNone       0   /* not compressed   */
#define sCmpFibDelta   1   /* Fibonacci-delta encoding (Appendix C) */
   /* Can be more kinds in the future.   */

struct Voice8Header {
   ULONG oneShotHiSamples,   /* # samples in the high octave 1-shot part */
        repeatHiSamples,   /* # samples in the high octave repeat part */
        samplesPerHiCycle;   /* # samples/cycle in high octave, else 0   */
   UWORD samplesPerSec;   /* data sampling rate   */
   UBYTE ctOctave,      /* # octaves of waveforms   */ 
   sCompression;      /* data compression technique used   */
   Fixed volume;      /* playback volume from 0 to Unity (full
              * volume). Map this value into the output
              * hardware's dynamic range.   */
   };

#define ID_NAME MakeID('N', 'A', 'M', 'E')
/* NAME chunk contains a CHAR[], the voice's name.   */

#define ID_Copyright MakeID('(', 'c', ')', ' ')
/* "(c) " chunk contains a CHAR[], the FORM's copyright notice.   */

#define ID_AUTH MakeID('A', 'U', 'T', 'H')
/* AUTH chunk contains a CHAR[], the author's name.   */

#define ID_ANNO MakeID('A', 'N', 'N', 'O')
/* ANNO chunk contains a CHAR[], author's text annotations.   */

#define ID_ATAK MakeID('A', 'T', 'A', 'K')
#define ID_RLSE MakeID('R', 'L', 'S', 'E')

struct EGPoint {
   UWORD duration;   /* segment duration in milliseconds, > 0   */
   Fixed dest;   /* destination volume factor   */
   };

/* ATAK and RLSE chunks contain an EGPoint[], piecewise-linear envelope. */
/* The envelope defines a function of time returning Fixed values. It's
 * used to scale the nominal volume specified in the Voice8Header.  */

#define ID_BODY MakeID('B', 'O', 'D', 'Y')

typedef BYTE character;   /* 8 bit signed number, -128 through 127.   */

/* BODY chunk contains a BYTE[], array of audio data samples.   */

#endif