/* Extended Module Player
 * Copyright (C) 1997-1999 Claudio Matsuoka and Hipolito Carraro Jr
 *
 * This file is part of the Extended Module Player and is distributed
 * under the terms of the GNU General Public License. See doc/COPYING
 * for more information.
 */

#ifndef __MIXER_H
#define __MIXER_H

/*#define SMIX_C4NOTE	6947*/
#define SMIX_C4NOTE	6864

#define SMIX_NUMVOC	64	/* default number of softmixer voices */
#define SMIX_MAXRAT	48000	/* max sampling rate (Hz) */
#define SMIX_MINBPM	0x21	/* min BPM */
#define SMIX_RESMAX	(sizeof (int16))	/* max output resolution */

#define SMIX_VOL_FT	4
#define SMIX_SFT_FT	16
#define SMIX_AND_FT	0xffff

#define FILTER_PRECISION (1<<12)
struct voice_info {
    int chn;			/* channel link */
    int root;			/* */
    unsigned int age;		/* */
    int note;			/* */
    int pan;			/* */
    int vol;			/* */
    int period;			/* current period */
    int pbase;			/* base period */
    int itpt;			/* interpolation */
    int pos;			/* position in sample */
    int fidx;			/* function index */
    int fxor;			/* function xor control */
    int ins;			/* instrument number */
    int smp;			/* sample number */
    int end;			/* loop end */
    int freq;
    int shl8;
    int act;			/* nna info & status of voice */
    int sleft;			/* last left sample output, in 32bit */
    int sright;			/* last right sample output, in 32bit */
    void *sptr;			/* sample pointer */

    int flt_X1;			/* filter variables */
    int flt_X2;
    int flt_B0;
    int flt_B1;
    int flt_B2;
    int cutoff;
    int resonance;
};

int	xmp_smix_on		(struct xmp_control *);
void	xmp_smix_off		(void);
void    xmp_smix_setvol		(int, int);
void    xmp_smix_seteffect	(int, int, int);
void    xmp_smix_setpan		(int, int);
int	xmp_smix_numvoices	(int);
void	xmp_smix_echoback	(int);
void	xmp_smix_starttimer	(void);
void	xmp_smix_stoptimer	(void);
int	xmp_smix_writepatch	(struct patch_info *);
int	xmp_smix_getmsg		(void);
void *	xmp_smix_buffer		(void);

#endif /* __MIXER_H */