/*
 * 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 */
