/*
 * 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.
 */

#ifndef	GSM_H
#define	GSM_H

#include	<stdio.h>		/* for FILE * 	*/

/*
 *	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

gsm gsm_create (void) ;

/* Added for libsndfile : May 6, 2002 */
void gsm_init (gsm) ;

void gsm_destroy (gsm) ;

int gsm_print	(FILE *, gsm, gsm_byte *) ;
int gsm_option	(gsm, int, int *) ;

void gsm_encode	(gsm, gsm_signal *, gsm_byte *) ;
int gsm_decode	(gsm, gsm_byte *, gsm_signal *) ;

int gsm_explode (gsm, gsm_byte *, gsm_signal *) ;
void gsm_implode (gsm, gsm_signal *, gsm_byte *) ;

#endif	/* GSM_H */