7c67e867c8
IBM.H is gone, video stuff re-organized. Keyboard stuff reorganized. Machines that have their own video, mouse and/or keyboard now have all this in their machine file. Fixed and other cleanups here and there.
125 lines
2.7 KiB
C
125 lines
2.7 KiB
C
#include <stdio.h>
|
|
#include <stdint.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include <wchar.h>
|
|
#include "../86box.h"
|
|
#include "../cpu/cpu.h"
|
|
#include "../machine/machine.h"
|
|
#include "../lpt.h"
|
|
#include "../timer.h"
|
|
#include "sound.h"
|
|
#include "filters.h"
|
|
#include "snd_lpt_dac.h"
|
|
|
|
typedef struct lpt_dac_t
|
|
{
|
|
uint8_t dac_val_l, dac_val_r;
|
|
|
|
int is_stereo;
|
|
int channel;
|
|
|
|
int16_t buffer[2][SOUNDBUFLEN];
|
|
int pos;
|
|
} lpt_dac_t;
|
|
|
|
static void dac_update(lpt_dac_t *lpt_dac)
|
|
{
|
|
for (; lpt_dac->pos < sound_pos_global; lpt_dac->pos++)
|
|
{
|
|
lpt_dac->buffer[0][lpt_dac->pos] = (int8_t)(lpt_dac->dac_val_l ^ 0x80) * 0x40;
|
|
lpt_dac->buffer[1][lpt_dac->pos] = (int8_t)(lpt_dac->dac_val_r ^ 0x80) * 0x40;
|
|
}
|
|
}
|
|
|
|
|
|
static void dac_write_data(uint8_t val, void *p)
|
|
{
|
|
lpt_dac_t *lpt_dac = (lpt_dac_t *)p;
|
|
|
|
timer_clock();
|
|
|
|
if (lpt_dac->is_stereo)
|
|
{
|
|
if (lpt_dac->channel)
|
|
lpt_dac->dac_val_r = val;
|
|
else
|
|
lpt_dac->dac_val_l = val;
|
|
}
|
|
else
|
|
lpt_dac->dac_val_l = lpt_dac->dac_val_r = val;
|
|
dac_update(lpt_dac);
|
|
}
|
|
|
|
static void dac_write_ctrl(uint8_t val, void *p)
|
|
{
|
|
lpt_dac_t *lpt_dac = (lpt_dac_t *)p;
|
|
|
|
if (lpt_dac->is_stereo)
|
|
lpt_dac->channel = val & 0x01;
|
|
}
|
|
|
|
static uint8_t dac_read_status(void *p)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
|
|
static void dac_get_buffer(int32_t *buffer, int len, void *p)
|
|
{
|
|
lpt_dac_t *lpt_dac = (lpt_dac_t *)p;
|
|
int c;
|
|
|
|
dac_update(lpt_dac);
|
|
|
|
for (c = 0; c < len; c++)
|
|
{
|
|
buffer[c*2] += dac_iir(0, lpt_dac->buffer[0][c]);
|
|
buffer[c*2 + 1] += dac_iir(1, lpt_dac->buffer[1][c]);
|
|
}
|
|
lpt_dac->pos = 0;
|
|
}
|
|
|
|
static void *dac_init()
|
|
{
|
|
lpt_dac_t *lpt_dac = malloc(sizeof(lpt_dac_t));
|
|
memset(lpt_dac, 0, sizeof(lpt_dac_t));
|
|
|
|
sound_add_handler(dac_get_buffer, lpt_dac);
|
|
|
|
return lpt_dac;
|
|
}
|
|
static void *dac_stereo_init()
|
|
{
|
|
lpt_dac_t *lpt_dac = dac_init();
|
|
|
|
lpt_dac->is_stereo = 1;
|
|
|
|
return lpt_dac;
|
|
}
|
|
static void dac_close(void *p)
|
|
{
|
|
lpt_dac_t *lpt_dac = (lpt_dac_t *)p;
|
|
|
|
free(lpt_dac);
|
|
}
|
|
|
|
lpt_device_t lpt_dac_device =
|
|
{
|
|
"LPT DAC / Covox Speech Thing",
|
|
dac_init,
|
|
dac_close,
|
|
dac_write_data,
|
|
dac_write_ctrl,
|
|
dac_read_status
|
|
};
|
|
lpt_device_t lpt_dac_stereo_device =
|
|
{
|
|
"Stereo LPT DAC",
|
|
dac_stereo_init,
|
|
dac_close,
|
|
dac_write_data,
|
|
dac_write_ctrl,
|
|
dac_read_status
|
|
};
|