/* Extended Module Player
 * Copyright (C) 1996-1999 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 __XMPI_H
#define __XMPI_H

#define XMP_DEF_MAXPAT	0xff		/* max number of samples in driver */
#define XMP_DEF_MAXORD	0x100		/* max number of patterns in module */
#define XMP_DEF_MAXROW	0x100		/* pattern loop stack size */
#define XMP_DEF_MAXVOL	(0x400 * 0x7fff)
#define XMP_DEF_EXTDRV	0xffff
#define XMP_DEF_MINLEN	0x1000

#if defined (DRIVER_OSS_MIX) || defined (DRIVER_OSS_SEQ)
#   if defined (HAVE_SYS_SOUNDCARD_H)
#	include <sys/soundcard.h>
#   elif defined (HAVE_MACHINE_SOUNDCARD_H)
#	include <machine/soundcard.h>
#   endif
#else
#   undef USE_ISA_CARDS
#   define WAVE_16_BITS    0x01   /* bit 0 = 8 or 16 bit wave data. */
#   define WAVE_UNSIGNED   0x02   /* bit 1 = Signed - Unsigned data. */
#   define WAVE_LOOPING    0x04   /* bit 2 = looping enabled-1. */
#   define WAVE_BIDIR_LOOP 0x08   /* bit 3 = Set is bidirectional looping. */
#   define WAVE_LOOP_BACK  0x10   /* bit 4 = Set is looping backward. */
#endif

#include <stdio.h>
#include <signal.h>

typedef signed char int8;
typedef signed short int int16;
typedef signed int int32;
typedef unsigned char uint8;
typedef unsigned short int uint16;
typedef unsigned int uint32;

#include "xmp.h"
#include "xxm.h"

/* [from the comp.lang.c Answers to Frequently Asked Questions]
 *
 * 9.10:   My compiler is leaving holes in structures, which is wasting
 *	   space and preventing "binary" I/O to external data files.  Can I
 *	   turn off the padding, or otherwise control the alignment of
 *	   structs?
 *
 * A:	   Your compiler may provide an extension to give you this control
 *	   (perhaps a #pragma), but there is no standard method.  See also
 *	   question 17.2.
 */

#ifdef HAVE_ATTRIBUTE_PACKED
#   define PACKED __attribute__((packed))
#else
#   define PACKED
#endif

/* Constants */
#define PAL_RATE	250.0		/* 1 / (50Hz * 80us)		  */
#define NTSC_RATE	208.0		/* 1 / (60Hz * 80us)		  */
#define C4_FREQ		130812		/* 440Hz / (2 ^ (21 / 12)) * 1000 */
#define C4_PAL_RATE	8287		/* 7093789.2 / period (C4) * 2	  */
#define C4_NTSC_RATE	8363		/* 7159090.5 / period (C4) * 2	  */

/* [Amiga] PAL color carrier frequency (PCCF) = 4.43361825 MHz */
/* [Amiga] CPU clock = 1.6 * PCCF = 7.0937892 MHz */

/* Global flags */
#define PATTERN_BREAK	0x0001 
#define PATTERN_LOOP	0x0002 
#define MODULE_ABORT	0x0004 
#define GLOBAL_VSLIDE	0x0010
#define ROW_MAX		0x0100

#define MSN(x)		(((x)&0xf0)>>4)
#define LSN(x)		((x)&0x0f)
#define SET_FLAG(a,b)	((a)|=(b))
#define RESET_FLAG(a,b)	((a)&=~(b))
#define TEST_FLAG(a,b)	!!((a)&(b))

#define EVENT(p, c, r)	xxt[xxp[p]->info[c].index]->event[r]

/* Endianism fixup */
#define FIX_ENDIANISM_16(x)	(x=((((x)&0xff00)>>8)|(((x)&0xff)<<8)))
#define FIX_ENDIANISM_32(x)	(x=(((x)&0xff000000)>>24)|(((x)&0xff0000)>>8)|\
				  (((x)&0xff00)<<8)|(((x)&0xff)<<24))
#ifdef WORDS_BIGENDIAN
#define L_ENDIAN16(x)	FIX_ENDIANISM_16(x)
#define L_ENDIAN32(x)	FIX_ENDIANISM_32(x)
#define B_ENDIAN16(x)	(x=x)
#define B_ENDIAN32(x)	(x=x)
#else
#define L_ENDIAN16(x)	(x=x)
#define L_ENDIAN32(x)	(x=x)
#define B_ENDIAN16(x)	FIX_ENDIANISM_16(x)
#define B_ENDIAN32(x)	FIX_ENDIANISM_32(x)
#endif

#define V(x) (xmp_ctl->verbose > (x))

struct xmp_ord_info {
    int bpm;
    int tempo;
    int gvl;
    int time;
};


/* Externs */

extern struct xxm_header *xxh;
extern struct xxm_pattern **xxp;
extern struct xxm_track **xxt;
extern struct xxm_instrument_header *xxih;
extern struct xxm_instrument_map *xxim;
extern struct xxm_instrument **xxi;
extern struct xxm_sample *xxs;
extern uint16 **xxae;
extern uint16 **xxpe;
extern uint16 **xxfe;
extern struct xxm_channel xxc[64]; 
extern uint8 xxo[XMP_DEF_MAXORD];

extern uint8 **med_vol_table;
extern uint8 **med_wav_table;

extern void (*xmp_event_callback)(unsigned long);

extern struct xmp_control *xmp_ctl;	/* built in control struct pointer */

/* Prototypes */

void	hscins_to_sbi	(char *);
#ifndef HAVE_BROKEN_STDARG
int	report		(char *, ...);
#else
#define report printf
#endif
void	diff2abs		(int, int, char *);
void	sig2uns			(int, int, char *);
void	change_sex		(int, char *);
void	double_sample		(int, char *);
int	ulaw_encode		(int);
char	*str_adj		(char *);
int	xmpi_scan_module	(void);
int	xmpi_player_start	(void);
int	xmpi_tell_wait		(void);
int	xmpi_select_read	(int, int);
int	xmpi_read_rc		(struct xmp_control *);
void	xmpi_read_modconf	(struct xmp_control *, unsigned, unsigned);
int	cksum			(FILE *);

#endif /* __XMPI_H */