parrocchetto/tools/g726/g726.h

/*
  ============================================================================
   File: G726.H                                        28-Feb-1991 (18:00:00)
  ============================================================================

                            UGST/ITU-T G726 MODULE

                          GLOBAL FUNCTION PROTOTYPES

   History:
   28.Feb.92	v1.0	First version <simao@cpqd.br>
   06.May.94    v2.0    Smart prototypes that work with many compilers <simao>
  ============================================================================
*/
#ifndef G726_defined
#define G726_defined 200

/* Smart function prototypes: for [ag]cc, VaxC, and [tb]cc */
#if !defined(ARGS)
#if (defined(__STDC__) || defined(VMS) || defined(__DECC)  || defined(MSDOS) || defined(__MSDOS__)) || defined (__CYGWIN__) || defined (_MSC_VER)
#define ARGS(s) s
#else
#define ARGS(s) ()
#endif
#endif


/* State for G726 encoder and decoder */
typedef struct {
  short sr0, sr1;               /* Reconstructed signal with delays 0 and 1 */
  short a1r, a2r;               /* Triggered 2nd order predictor coeffs. */
  short b1r;                    /* Triggered 6nd order predictor coeffs */
  short b2r;
  short b3r;
  short b4r;
  short b5r;
  short b6r;
  short dq5;                    /* Quantized difference signal with delays 5 to 0 */
  short dq4;
  short dq3;
  short dq2;
  short dq1;
  short dq0;
  short dmsp;                   /* Short term average of the F(I) sequence */
  short dmlp;                   /* Long term average of the F(I) sequence */
  short apr;                    /* Triggered unlimited speed control parameter */
  short yup;                    /* Fast quantizer scale factor */
  short tdr;                    /* Triggered tone detector */
  short pk0, pk1;               /* sign of dq+sez with delays 0 and 1 */
  long ylp;                     /* Slow quantizer scale factor */
} G726_state;

/* Function prototypes */
void G726_encode ARGS ((short *inp_buf, short *out_buf, long smpno, char *law, short rate, short r, G726_state * state));
void G726_decode ARGS ((short *inp_buf, short *out_buf, long smpno, char *law, short rate, short r, G726_state * state));
void G726_expand ARGS ((short *s, char *law, short *sl));
void G726_subta ARGS ((short *sl, short *se, short *d));
void G726_log ARGS ((short *d, short *dl, short *ds));
void G726_quan ARGS ((short rate, short *dln, short *ds, short *i));
void G726_subtb ARGS ((short *dl, short *y, short *dln));
void G726_adda ARGS ((short *dqln, short *y, short *dql));
void G726_antilog ARGS ((short *dql, short *dqs, short *dq));
void G726_reconst ARGS ((short rate, short *i, short *dqln, short *dqs));
void G726_delaya ARGS ((short *r, short *x, short *y));
void G726_delayb ARGS ((short *r, short *x, short *y));
void G726_delayc ARGS ((short *r, long *x, long *y));
void G726_delayd ARGS ((short *r, short *x, short *y));
void G726_filtd ARGS ((short *wi, short *y, short *yut));
void G726_filte ARGS ((short *yup, long *yl, long *ylp));
void G726_functw ARGS ((short rate, short *i, short *wi));
void G726_limb ARGS ((short *yut, short *yup));
void G726_mix ARGS ((short *al, short *yu, long *yl, short *y));
void G726_filta ARGS ((short *fi, short *dms, short *dmsp));
void G726_filtb ARGS ((short *fi, short *dml, short *dmlp));
void G726_filtc ARGS ((short *ax, short *ap, short *app));
void G726_functf ARGS ((short rate, short *i, short *fi));
void G726_lima ARGS ((short *ap, short *al));
void G726_subtc ARGS ((short *dmsp, short *dmlp, short *tdp, short *y, short *ax));
void G726_triga ARGS ((short *tr, short *app, short *apr));
void G726_accum ARGS ((short *wa1, short *wa2, short *wb1, short *wb2, short *wb3, short *wb4, short *wb5, short *wb6, short *se, short *sez));
void G726_addb ARGS ((short *dq, short *se, short *sr));
void G726_addc ARGS ((short *dq, short *sez, short *pk0, short *sigpk));
void G726_floata ARGS ((short *dq, short *dq0));
void G726_floatb ARGS ((short *sr, short *sr0));
void G726_fmult ARGS ((short *An, short *SRn, short *WAn));
void G726_limc ARGS ((short *a2t, short *a2p));
void G726_limd ARGS ((short *a1t, short *a2p, short *a1p));
void G726_trigb ARGS ((short *tr, short *ap, short *ar));
void G726_upa1 ARGS ((short *pk0, short *pk1, short *a1, short *sigpk, short *a1t));
void G726_upa2 ARGS ((short *pk0, short *pk1, short *pk2, short *a2, short *a1, short *sigpk, short *a2t));
void G726_upb ARGS ((short rate, short *u, short *b, short *dq, short *bp));
void G726_xor ARGS ((short *dqn, short *dq, short *u));
void G726_tone ARGS ((short *a2p, short *tdp));
void G726_trans ARGS ((short *td, long *yl, short *dq, short *tr));
void G726_compress ARGS ((short *sr, char *law, short *sp));
void G726_sync ARGS ((short rate, short *i, short *sp, short *dlnx, short *dsx, char *law, short *sd));

/* Definitions for better user interface (?!) */
#ifndef IS_LOG
#define IS_LOG   0
#endif

#ifndef IS_LIN
#define IS_LIN   1
#endif

#ifndef IS_ADPCM
#define IS_ADPCM 2
#endif

#endif
/* .......................... End of G726.H ........................... */