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Add the CMS emulation to the SB 1.0, 1.5 and 2.0

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This commit is contained in:
Alexander Babikov
2021-08-04 13:51:00 +05:00
parent 06eda55634
commit e41d473f43
2 changed files with 132 additions and 23 deletions
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4
src/include/86box/snd_sb.h
View File

@@ -22,6 +22,7 @@
#include <86box/snd_mpu401.h>
#include <86box/snd_opl.h>
#include <86box/snd_sb_dsp.h>
#include <86box/snd_cms.h>
#define SADLIB 1 /* No DSP */
#define SB1 2 /* DSP v1.05 */
@@ -111,7 +112,8 @@ typedef struct sb_ct1745_mixer_t
typedef struct sb_t
{
uint8_t opl_enabled, mixer_enabled;
uint8_t cms_enabled, opl_enabled, mixer_enabled;
cms_t cms;
opl_t opl, opl2;
sb_dsp_t dsp;
union {

151
src/sound/snd_sb.c
View File

@@ -186,34 +186,53 @@ sb_get_buffer_sb2(int32_t *buffer, int len, void *p)
sb_t *sb = (sb_t *) p;
sb_ct1335_mixer_t *mixer = &sb->mixer_sb2;
int c;
double out = 0.0;
double out_mono = 0.0, out_l = 0.0, out_r = 0.0;
if (sb->opl_enabled)
opl2_update(&sb->opl);
sb_dsp_update(&sb->dsp);
for (c = 0; c < len * 2; c += 2) {
out = 0.0;
if (sb->cms_enabled)
cms_update(&sb->cms);
if (sb->opl_enabled) {
out = ((double) sb->opl.buffer[c]) * 0.7171630859375;
if (sb->mixer_enabled)
out *= mixer->fm;
for (c = 0; c < len * 2; c += 2) {
out_mono = 0.0;
out_l = 0.0;
out_r = 0.0;
if (sb->opl_enabled)
out_mono = ((double) sb->opl.buffer[c]) * 0.7171630859375;
if (sb->cms_enabled) {
out_l += sb->cms.buffer[c];
out_r += sb->cms.buffer[c + 1];
}
out_l += out_mono;
out_r += out_mono;
if (((sb->opl_enabled) || (sb->cms_enabled)) && sb->mixer_enabled) {
out_l *= mixer->fm;
out_r *= mixer->fm;
}
/* TODO: Recording: I assume it has direct mic and line in like SB2.
It is unclear from the docs if it has a filter, but it probably does. */
/* TODO: Recording: Mic and line In with AGC. */
if (sb->mixer_enabled)
out_mono = (sb_iir(0, 0, (double) sb->dsp.buffer[c]) * mixer->voice) / 3.9;
else
out_mono = (((sb_iir(0, 0, (double) sb->dsp.buffer[c]) / 1.3) * 65536.0) / 3.0) / 65536.0;
out_l += out_mono;
out_r += out_mono;
if (sb->mixer_enabled) {
out += (sb_iir(0, 0, (double) sb->dsp.buffer[c]) * mixer->voice) / 3.9;
out_l *= mixer->master;
out_r *= mixer->master;
}
out *= mixer->master;
} else
out += (((sb_iir(0, 0, (double) sb->dsp.buffer[c]) / 1.3) * 65536.0) / 3.0) / 65536.0;
buffer[c] += (int32_t) out;
buffer[c + 1] += (int32_t) out;
buffer[c] += (int32_t) out_l;
buffer[c + 1] += (int32_t) out_r;
}
sb->pos = 0;
@@ -222,6 +241,9 @@ sb_get_buffer_sb2(int32_t *buffer, int len, void *p)
sb->opl.pos = 0;
sb->dsp.pos = 0;
if (sb->cms_enabled)
sb->cms.pos = 0;
}
@@ -1261,8 +1283,7 @@ sb_1_init(const device_t *info)
sb_dsp_setaddr(&sb->dsp, addr);
sb_dsp_setirq(&sb->dsp, device_get_config_int("irq"));
sb_dsp_setdma8(&sb->dsp, device_get_config_int("dma"));
/* CMS I/O handler is activated on the dedicated sound_cms module
DSP I/O handler is activated in sb_dsp_setaddr */
/* DSP I/O handler is activated in sb_dsp_setaddr */
if (sb->opl_enabled) {
io_sethandler(addr + 8, 0x0002, opl2_read, NULL, NULL,
opl2_write, NULL, NULL, &sb->opl);
@@ -1270,6 +1291,10 @@ sb_1_init(const device_t *info)
opl2_write, NULL, NULL, &sb->opl);
}
sb->cms_enabled = 1;
memset(&sb->cms, 0, sizeof(cms_t));
io_sethandler(addr, 0x0004, cms_read, NULL, NULL, cms_write, NULL, NULL, &sb->cms);
sb->mixer_enabled = 0;
sound_add_handler(sb_get_buffer_sb2, sb);
sound_set_cd_audio_filter(sb2_filter_cd_audio, sb);
@@ -1300,8 +1325,7 @@ sb_15_init(const device_t *info)
sb_dsp_setaddr(&sb->dsp, addr);
sb_dsp_setirq(&sb->dsp, device_get_config_int("irq"));
sb_dsp_setdma8(&sb->dsp, device_get_config_int("dma"));
/* CMS I/O handler is activated on the dedicated sound_cms module
DSP I/O handler is activated in sb_dsp_setaddr */
/* DSP I/O handler is activated in sb_dsp_setaddr */
if (sb->opl_enabled) {
io_sethandler(addr + 8, 0x0002, opl2_read, NULL, NULL,
opl2_write, NULL, NULL, &sb->opl);
@@ -1309,6 +1333,12 @@ sb_15_init(const device_t *info)
opl2_write, NULL, NULL, &sb->opl);
}
sb->cms_enabled = device_get_config_int("cms");
if (sb->cms_enabled) {
memset(&sb->cms, 0, sizeof(cms_t));
io_sethandler(addr, 0x0004, cms_read, NULL, NULL, cms_write, NULL, NULL, &sb->cms);
}
sb->mixer_enabled = 0;
sound_add_handler(sb_get_buffer_sb2, sb);
sound_set_cd_audio_filter(sb2_filter_cd_audio, sb);
@@ -1385,10 +1415,11 @@ sb_2_init(const device_t *info)
sb_dsp_setdma8(&sb->dsp, device_get_config_int("dma"));
if (mixer_addr > 0x000)
sb_ct1335_mixer_reset(sb);
/* CMS I/O handler is activated on the dedicated sound_cms module
DSP I/O handler is activated in sb_dsp_setaddr */
sb->cms_enabled = device_get_config_int("cms");
/* DSP I/O handler is activated in sb_dsp_setaddr */
if (sb->opl_enabled) {
if (!GAMEBLASTER) {
if (!sb->cms_enabled) {
io_sethandler(addr, 0x0002, opl2_read, NULL, NULL,
opl2_write, NULL, NULL, &sb->opl);
}
@@ -1398,6 +1429,11 @@ sb_2_init(const device_t *info)
opl2_write, NULL, NULL, &sb->opl);
}
if (sb->cms_enabled) {
memset(&sb->cms, 0, sizeof(cms_t));
io_sethandler(addr, 0x0004, cms_read, NULL, NULL, cms_write, NULL, NULL, &sb->cms);
}
if (mixer_addr > 0x000) {
sb->mixer_enabled = 1;
io_sethandler(addr + 4, 0x0002, sb_ct1335_mixer_read, NULL, NULL,
@@ -1926,6 +1962,74 @@ static const device_config_t sb_config[] =
};
static const device_config_t sb15_config[] =
{
{
"base", "Address", CONFIG_HEX16, "", 0x220, "", { 0 },
{
{
"0x220", 0x220
},
{
"0x240", 0x240
},
{
"0x260", 0x260
},
{
""
}
}
},
{
"irq", "IRQ", CONFIG_SELECTION, "", 7, "", { 0 },
{
{
"IRQ 2", 2
},
{
"IRQ 3", 3
},
{
"IRQ 5", 5
},
{
"IRQ 7", 7
},
{
""
}
}
},
{
"dma", "DMA", CONFIG_SELECTION, "", 1, "", { 0 },
{
{
"DMA 1", 1
},
{
"DMA 3", 3
},
{
""
}
}
},
{
"opl", "Enable OPL", CONFIG_BINARY, "", 1
},
{
"cms", "Enable CMS", CONFIG_BINARY, "", 0
},
{
"receive_input", "Receive input (SB MIDI)", CONFIG_BINARY, "", 1
},
{
"", "", -1
}
};
static const device_config_t sb2_config[] =
{
{
@@ -2002,6 +2106,9 @@ static const device_config_t sb2_config[] =
{
"opl", "Enable OPL", CONFIG_BINARY, "", 1
},
{
"cms", "Enable CMS", CONFIG_BINARY, "", 0
},
{
"receive_input", "Receive input (SB MIDI)", CONFIG_BINARY, "", 1
},
@@ -2509,7 +2616,7 @@ const device_t sb_15_device =
sb_15_init, sb_close, NULL, { NULL },
sb_speed_changed,
NULL,
sb_config
sb15_config
};
const device_t sb_mcv_device =