www.pudn.com > speakfs72.zip > ADPCM.H, change:2002-01-05,size:430b


/* 
** adpcm.h - include file for adpcm coder. 
** 
** Version 1.0, 7-Jul-92. 
*/ 
 
struct adpcm_state { 
    short	valprev;	/* Previous output value */ 
    char	index;		/* Index into stepsize table */ 
}; 
 
#ifdef __STDC__ 
#define ARGS(x) x 
#else 
#define ARGS(x) () 
#endif 
 
void adpcm_coder ARGS((short [], char [], int, struct adpcm_state *)); 
void adpcm_decoder ARGS((char [], short [], int, struct adpcm_state *));