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/*********************************************************
Capcom Q-Sound system
*********************************************************/
#ifndef __QSOUND_H__
#define __QSOUND_H__
#define QSOUND_CLOCK 4000000 /* default 4MHz clock */
struct QSound_interface
{
int clock; /* clock */
char *sample_rom; /* sample data */
};
/*
Two Q sound drivers:
DRIVER1 Based on the Amuse source
DRIVER2 Miguel Angel Horna (mahorna@teleline.es)
*/
#define QSOUND_DRIVER1 1
/*
I don't know whether this system uses 8 bit or 16 bit samples.
If it uses 16 bit samples then the sample ROM loading macros need
to be modified to work with non-intel machines.
*/
#define QSOUND_8BIT_SAMPLES 1
/*
Debug defines
*/
#define LOG_WAVE 0
#define LOG_QSOUND 0
/* Typedefs & defines */
#define QSOUND_DRIVER2 !QSOUND_DRIVER1
#if QSOUND_8BIT_SAMPLES
/* 8 bit source ROM samples */
typedef signed char QSOUND_SRC_SAMPLE;
#define LENGTH_DIV 1
#else
/* 8 bit source ROM samples */
typedef signed short QSOUND_SRC_SAMPLE;
#define LENGTH_DIV 2
#endif
#define QSOUND_CLOCKDIV 166 /* Clock divider */
#define QSOUND_CHANNELS 16
typedef INT16 QSOUND_SAMPLE;
struct QSOUND_CHANNEL
{
int bank; /* bank (x16) */
int address; /* start address */
int pitch; /* pitch */
int reg3; /* unknown (always 0x8000) */
int loop; /* loop address */
int end; /* end address */
int vol; /* master volume */
int pan; /* Pan value */
int reg9; /* unknown */
/* Work variables */
int key; /* Key on / key off */
#if QSOUND_DRIVER1
int lvol; /* left volume */
int rvol; /* right volume */
int lastdt; /* last sample value */
int offset; /* current offset counter */
#else
QSOUND_SRC_SAMPLE *buffer;
int factor; /*step factor (fixed point 8-bit)*/
int mixl,mixr; /*mixing factor (fixed point)*/
int cursor; /*current sample position (fixed point)*/
int lpos; /*last cursor pos*/
int lastsaml; /*last left sample (to avoid any calculation)*/
int lastsamr; /*last right sample*/
#endif
};
typedef struct {
/* Private variables */
struct QSound_interface intf; /* Interface */
int qsound_stream; /* Audio stream */
struct QSOUND_CHANNEL qsound_channel[QSOUND_CHANNELS];
int qsound_data; /* register latch data */
QSOUND_SRC_SAMPLE *qsound_sample_rom; /* Q sound sample ROM */
#if QSOUND_DRIVER1
int qsound_pan_table[33]; /* Pan volume table */
float qsound_frq_ratio; /* Frequency ratio */
#endif
#if LOG_WAVE
FILE *fpRawDataL;
FILE *fpRawDataR;
#endif
} qsound_state_t;
qsound_state_t *qsound_sh_start(struct QSound_interface *qsintf);
void qsound_sh_stop(qsound_state_t *qs);
void qsound_data_h_w(qsound_state_t *qs, int data);
void qsound_data_l_w(qsound_state_t *qs, int data);
void qsound_cmd_w(qsound_state_t *qs, int data);
int qsound_status_r(qsound_state_t *qs);
void qsound_update(qsound_state_t *qs, int num, INT16 **buffer, int length);
void qsound_set_command(qsound_state_t *qs, int data, int value);
#endif /* __QSOUND_H__ */
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