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SB AWE32 emulation.

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This commit is contained in:
TomW 2013-07-23 22:04:17 +01:00
commit 39a3c8b1c7
6 changed files with 814 additions and 2 deletions
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61
src/sound_sb.c
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@ -1,6 +1,7 @@
#include <stdlib.h>
#include "ibm.h"
#include "device.h"
#include "sound_emu8k.h"
#include "sound_mpu401_uart.h"
#include "sound_opl.h"
#include "sound_sb.h"
@ -27,9 +28,11 @@ typedef struct sb_t
sb_dsp_t dsp;
sb_mixer_t mixer;
mpu401_uart_t mpu;
emu8k_t emu8k;
int16_t opl_buffer[SOUNDBUFLEN * 2];
int16_t dsp_buffer[SOUNDBUFLEN * 2];
int16_t emu8k_buffer[SOUNDBUFLEN * 2];
int pos;
} sb_t;
@ -65,6 +68,18 @@ static void sb_opl3_poll(void *p)
sb->pos++;
}
static void sb_emu8k_poll(void *p)
{
sb_t *sb = (sb_t *)p;
if (sb->pos >= SOUNDBUFLEN) return;
opl3_poll(&sb->opl, &sb->opl_buffer[sb->pos * 2], &sb->opl_buffer[(sb->pos * 2) + 1]);
sb_dsp_poll(&sb->dsp, &sb->dsp_buffer[sb->pos * 2], &sb->dsp_buffer[(sb->pos * 2) + 1]);
emu8k_poll_getsamp(&sb->emu8k, &sb->emu8k_buffer[sb->pos * 2], &sb->emu8k_buffer[(sb->pos * 2) + 1]);
sb->pos++;
}
static void sb_get_buffer(int16_t *buffer, int len, void *p)
{
sb_t *sb = (sb_t *)p;
@ -78,6 +93,10 @@ static void sb_get_buffer(int16_t *buffer, int len, void *p)
out_l = ((sb->opl_buffer[c] * mixer->fm_l) >> 16);
out_r = ((sb->opl_buffer[c + 1] * mixer->fm_r) >> 16);
out_l += ((sb->emu8k_buffer[c] * mixer->fm_l) >> 16);
out_r += ((sb->emu8k_buffer[c + 1] * mixer->fm_l) >> 16);
if (sb->mixer.filter)
{
out_l += (int)(((sb_iir(0, (float)sb->dsp_buffer[c]) / 1.3) * mixer->voice_l) / 3) >> 16;
@ -357,6 +376,40 @@ void *sb_16_init()
return sb;
}
void *sb_awe32_init()
{
sb_t *sb = malloc(sizeof(sb_t));
memset(sb, 0, sizeof(sb_t));
opl3_init(&sb->opl);
sb_dsp_init(&sb->dsp, SB16);
sb_dsp_setaddr(&sb->dsp, 0x0220);
sb_mixer_init(&sb->mixer);
io_sethandler(0x0220, 0x0004, opl3_read, NULL, NULL, opl3_write, NULL, NULL, &sb->opl);
io_sethandler(0x0228, 0x0002, opl3_read, NULL, NULL, opl3_write, NULL, NULL, &sb->opl);
io_sethandler(0x0388, 0x0002, opl3_read, NULL, NULL, opl3_write, NULL, NULL, &sb->opl);
io_sethandler(0x0224, 0x0002, sb_16_mixer_read, NULL, NULL, sb_16_mixer_write, NULL, NULL, sb);
sound_add_handler(sb_emu8k_poll, sb_get_buffer, sb);
mpu401_uart_init(&sb->mpu, 0x330);
emu8k_init(&sb->emu8k);
sb->mixer.regs[0x30] = 31 << 3;
sb->mixer.regs[0x31] = 31 << 3;
sb->mixer.regs[0x32] = 31 << 3;
sb->mixer.regs[0x33] = 31 << 3;
sb->mixer.regs[0x34] = 31 << 3;
sb->mixer.regs[0x35] = 31 << 3;
sb->mixer.regs[0x44] = 8 << 4;
sb->mixer.regs[0x45] = 8 << 4;
sb->mixer.regs[0x46] = 8 << 4;
sb->mixer.regs[0x47] = 8 << 4;
sb->mixer.regs[0x22] = (sb->mixer.regs[0x30] & 0xf0) | (sb->mixer.regs[0x31] >> 4);
sb->mixer.regs[0x04] = (sb->mixer.regs[0x32] & 0xf0) | (sb->mixer.regs[0x33] >> 4);
sb->mixer.regs[0x26] = (sb->mixer.regs[0x34] & 0xf0) | (sb->mixer.regs[0x35] >> 4);
return sb;
}
void sb_close(void *p)
{
sb_t *sb = (sb_t *)p;
@ -419,3 +472,11 @@ device_t sb_16_device =
sb_speed_changed,
NULL
};
device_t sb_awe32_device =
{
"Sound Blaster AWE32",
sb_awe32_init,
sb_close,
sb_speed_changed,
NULL
};