lpcdefs.h

this the source code of audio compression standard LPC. It is coded by C.

/*                              lpcdefs.h                       */
#ifdef sun
#include <stdio.h>
#include <fcntl.h>
#define END 88
#define NOFILE 99
#endif

#define LFRAME 180
#define ORDER 10

#define mmax(A,B)        ((A)>(B)?(A):(B))
#define mmin(A,B)        ((A)<(B)?(A):(B))


/* from analys.c */
#define NF 4
#define AF 3
#define OSLEN 10
#define LTAU 60
#define SBUFL ((AF-2)*MAXFRM+1)				/* (3-2)*180+1 = 181 */
#define SBUFH (NF*MAXFRM)				/* 4*180 = 720 */
#define LBUFL ((AF-2)*MAXFRM-MAXPIT+1)			/* (3-2)*180-156+1 = 25 */
#define LBUFH (NF*MAXFRM)				/* 4*180 = 720 */
#define MINWIN 90
#define MAXWIN 156
#define PWLEN (MAXPIT+MAXWIN)				/* 156 + 156 = 312 */
#define PWINH (AF*MAXFRM)				/* 3 * 180 = 540 */
#define PWINL (PWINH-PWLEN+1)				/*  540 - 312 + 1 = 229 */
#define DVWINL (PWINH-PWLEN/2 - MAXWIN/2 +1)
#define DVWINH (DVWINL+MAXWIN-1)