gsm.h

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/*
 * Copyright 1992 by Jutta Degener and Carsten Bormann, Technische
 * Universitaet Berlin.  See the accompanying file "COPYRIGHT" for
 * details.  THERE IS ABSOLUTELY NO WARRANTY FOR THIS SOFTWARE.
 */
 
/*$Header$*/
 
#ifndef GSM_H
#define GSM_H
 
#ifdef __cplusplus
#   define  NeedFunctionPrototypes  1
#endif
 
#if __STDC__
#   define  NeedFunctionPrototypes  1
#endif
 
#ifdef _NO_PROTO
#   undef   NeedFunctionPrototypes
#endif
 
#ifdef NeedFunctionPrototypes
#   include <stdio.h>       /* for FILE *   */
#endif
 
#undef GSM_P
#if NeedFunctionPrototypes
#   define  GSM_P( protos ) protos
#else
#   define  GSM_P( protos ) ( /* protos */ )
#endif
 
/*
 *  Interface
 */
 
typedef struct gsm_state *  gsm;
typedef short           gsm_signal;     /* signed 16 bit */
typedef unsigned char       gsm_byte;
typedef gsm_byte        gsm_frame[33];      /* 33 * 8 bits   */
 
#define GSM_MAGIC       0xD         /* 13 kbit/s RPE-LTP */
 
#define GSM_PATCHLEVEL      10
#define GSM_MINOR       0
#define GSM_MAJOR       1
 
#define GSM_OPT_VERBOSE     1
#define GSM_OPT_FAST        2
#define GSM_OPT_LTP_CUT     3
#define GSM_OPT_WAV49       4
#define GSM_OPT_FRAME_INDEX 5
#define GSM_OPT_FRAME_CHAIN 6
 
extern gsm  gsm_create  GSM_P((void));
extern void gsm_destroy GSM_P((gsm));
 
extern int  gsm_print   GSM_P((FILE *, gsm, gsm_byte  *));
extern int  gsm_option  GSM_P((gsm, int, int *));
 
extern void gsm_encode  GSM_P((gsm, gsm_signal *, gsm_byte  *));
extern int  gsm_decode  GSM_P((gsm, gsm_byte   *, gsm_signal *));
 
extern int  gsm_explode GSM_P((gsm, gsm_byte   *, gsm_signal *));
extern void gsm_implode GSM_P((gsm, gsm_signal *, gsm_byte   *));
 
#undef  GSM_P
 
#endif  /* GSM_H */