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gsm.h

#ifndef     VAT_GSM_H
#define     VAT_GSM_H

#ifndef PRIVATE_H
typedef short           word;             /* 16 bit signed int    */
typedef int       longword;         /* 32 bit signed int    */

typedef unsigned short  uword;                  /* unsigned word  */
typedef unsigned int    ulongword;        /* unsigned longword    */

struct gsm_state {

      word        dp0[ 280 ];

      word        z1;         /* preprocessing.c, Offset_com. */
      longword    L_z2;       /*                  Offset_com. */
      int         mp;         /*                  Preemphasis     */

      word        u[8];       /* short_term_aly_filter.c    */
      word        LARpp[2][8];      /*                              */
      word        j;          /*                              */

      word        ltp_cut;    /* long_term.c, LTP crosscorr.  */
      word        nrp; /* 40 */     /* long_term.c, synthesis     */
      word        v[9];       /* short_term.c, synthesis    */
      word        msr;        /* decoder.c,     Postprocessing    */

      char        verbose;
      char        fast;
};
#endif

typedef struct gsm_state      gsm_state;
typedef unsigned char         gsm_byte;
typedef unsigned char         ulaw_byte;

#define     GSM_MAGIC   0xD                     /* 13 kbit/s RPE-LTP */

extern void Vat_Gsm_InitS(gsm_state *);
extern void Vat_Gsm_InitR(gsm_state *);
extern void Vat_Gsm_Encoder(gsm_state *, const ulaw_byte *, gsm_byte*);
extern void Vat_Gsm_Decoder(gsm_state *, ulaw_byte *, const gsm_byte *);

#endif      /* GSM_H */

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