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86Box/src/sound/snd_ess.c
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2024-03-21 12:52:13 -03:00

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19 KiB
C

/*
* 86Box A hypervisor and IBM PC system emulator that specializes in
* running old operating systems and software designed for IBM
* PC systems and compatibles from 1981 through fairly recent
* system designs based on the PCI bus.
*
* This file is part of the 86Box distribution.
*
* Sound Blaster emulation.
*
*
*
* Authors: Sarah Walker, <https://pcem-emulator.co.uk/>
* Miran Grca, <mgrca8@gmail.com>
* TheCollector1995, <mariogplayer@gmail.com>
*
* Copyright 2008-2020 Sarah Walker.
* Copyright 2016-2020 Miran Grca.
*/
#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <wchar.h>
#define HAVE_STDARG_H
#include <86box/86box.h>
#include <86box/device.h>
#include <86box/filters.h>
#include <86box/gameport.h>
#include <86box/hdc.h>
#include <86box/isapnp.h>
#include <86box/hdc_ide.h>
#include <86box/io.h>
#include <86box/mca.h>
#include <86box/mem.h>
#include <86box/midi.h>
#include <86box/pic.h>
#include <86box/rom.h>
#include <86box/sound.h>
#include <86box/timer.h>
#include <86box/snd_sb.h>
#include <86box/plat_unused.h>
static const double sb_att_4dbstep_3bits[] = {
164.0, 2067.0, 3276.0, 5193.0, 8230.0, 13045.0, 20675.0, 32767.0
};
static const double sb_att_7dbstep_2bits[] = {
164.0, 6537.0, 14637.0, 32767.0
};
/* SB PRO */
typedef struct ess_mixer_t {
double master_l;
double master_r;
double voice_l;
double voice_r;
double fm_l;
double fm_r;
double cd_l;
double cd_r;
double line_l;
double line_r;
double mic;
/*see sb_ct1745_mixer for values for input selector*/
int32_t input_selector;
int input_filter;
int in_filter_freq;
int output_filter;
int stereo;
int stereo_isleft;
uint8_t index;
uint8_t regs[256];
uint8_t ess_id_str[256];
uint8_t ess_id_str_pos : 2;
} ess_mixer_t;
typedef struct ess_t {
uint8_t mixer_enabled;
fm_drv_t opl;
sb_dsp_t dsp;
ess_mixer_t mixer_sbpro;
mpu_t *mpu;
void *gameport;
uint16_t gameport_addr;
void *opl_mixer;
void (*opl_mix)(void*, double*, double*);
} ess_t;
static inline uint8_t expand16to32(const uint8_t t) {
/* 4-bit -> 5-bit expansion.
*
* 0 -> 0
* 1 -> 2
* 2 -> 4
* 3 -> 6
* ....
* 7 -> 14
* 8 -> 17
* 9 -> 19
* 10 -> 21
* 11 -> 23
* ....
* 15 -> 31 */
return (t << 1) | (t >> 3);
}
static double ess_mixer_get_vol_4bit(uint8_t vol)
{
return (48.0 + (20.0 * log((vol & 0xF) / 15.0))) / 48.0;
}
void
ess_mixer_write(uint16_t addr, uint8_t val, void *priv)
{
ess_t *ess = (ess_t *) priv;
ess_mixer_t *mixer = &ess->mixer_sbpro;
if (!(addr & 1)) {
mixer->index = val;
mixer->regs[0x01] = val;
if (val == 0x40)
mixer->ess_id_str_pos = 0;
} else {
if (mixer->index == 0) {
/* Reset */
mixer->regs[0x0a] = mixer->regs[0x0c] = 0x00;
mixer->regs[0x0e] = 0x00;
/* Changed default from -11dB to 0dB */
mixer->regs[0x04] = mixer->regs[0x22] = 0xee;
mixer->regs[0x26] = mixer->regs[0x28] = 0xee;
mixer->regs[0x2e] = 0x00;
/* Initialize ESS regs. */
mixer->regs[0x14] = mixer->regs[0x32] = 0x88;
mixer->regs[0x36] = 0x88;
mixer->regs[0x38] = 0x00;
mixer->regs[0x3a] = 0x00;
mixer->regs[0x3e] = 0x00;
sb_dsp_set_stereo(&ess->dsp, mixer->regs[0x0e] & 2);
} else {
mixer->regs[mixer->index] = val;
pclog("ess: Register WRITE: %02X\t%02X\n", mixer->index, mixer->regs[mixer->index]);
switch (mixer->index) {
/* Compatibility: chain registers 0x02 and 0x22 as well as 0x06 and 0x26 */
case 0x02:
case 0x06:
case 0x08:
mixer->regs[mixer->index + 0x20] = ((val & 0xe) << 4) | (val & 0xe);
break;
case 0x14:
mixer->regs[0x4] = val & 0xee;
break;
case 0x22:
case 0x26:
case 0x28:
case 0x2E:
mixer->regs[mixer->index - 0x20] = (val & 0xe);
mixer->regs[mixer->index + 0x10] = val;
break;
/* More compatibility:
SoundBlaster Pro selects register 020h for 030h, 022h for 032h,
026h for 036h, and 028h for 038h. */
case 0x30:
mixer->regs[mixer->index - 0x10] = (val & 0xee);
break;
case 0x32:
case 0x36:
case 0x38:
case 0x3e:
mixer->regs[mixer->index - 0x10] = (val & 0xee);
break;
case 0x00:
case 0x04:
case 0x0a:
case 0x0c:
case 0x0e:
break;
case 0x64:
mixer->regs[mixer->index] &= ~0x8;
break;
case 0x40: {
break;
uint16_t mpu401_base_addr = 0x300 | ((mixer->regs[0x40] & 0x38) << 1);
gameport_remap(ess->gameport, !(mixer->regs[0x40] & 0x2) ? 0x00 : 0x200);
/* This doesn't work yet. */
/*
io_removehandler(0x0388, 0x0004,
ess->opl.read, NULL, NULL,
ess->opl.write, NULL, NULL,
ess->opl.priv);
if (mixer->regs[0x40] & 1) {
io_sethandler(0x0388, 0x0004,
ess->opl.read, NULL, NULL,
ess->opl.write, NULL, NULL,
ess->opl.priv);
}*/
switch ((mixer->regs[0x40] >> 5) & 7) {
case 0:
mpu401_change_addr(ess->mpu, 0x00);
mpu401_setirq(ess->mpu, -1);
break;
case 1:
mpu401_change_addr(ess->mpu, mpu401_base_addr);
mpu401_setirq(ess->mpu, -1);
break;
case 2:
mpu401_change_addr(ess->mpu, mpu401_base_addr);
mpu401_setirq(ess->mpu, ess->dsp.sb_irqnum);
break;
case 3:
mpu401_change_addr(ess->mpu, mpu401_base_addr);
mpu401_setirq(ess->mpu, 11);
break;
case 4:
mpu401_change_addr(ess->mpu, mpu401_base_addr);
mpu401_setirq(ess->mpu, 9);
break;
case 5:
mpu401_change_addr(ess->mpu, mpu401_base_addr);
mpu401_setirq(ess->mpu, 5);
break;
case 6:
mpu401_change_addr(ess->mpu, mpu401_base_addr);
mpu401_setirq(ess->mpu, 7);
break;
case 7:
mpu401_change_addr(ess->mpu, mpu401_base_addr);
mpu401_setirq(ess->mpu, 10);
break;
}
break;
}
default:
pclog("ess: Unknown register WRITE: %02X\t%02X\n", mixer->index, mixer->regs[mixer->index]);
break;
}
}
mixer->voice_l = ess_mixer_get_vol_4bit(mixer->regs[0x14]);
mixer->voice_r = ess_mixer_get_vol_4bit(mixer->regs[0x14] >> 4);
mixer->master_l = ess_mixer_get_vol_4bit(mixer->regs[0x32]);
mixer->master_r = ess_mixer_get_vol_4bit(mixer->regs[0x32] >> 4);
mixer->fm_l = ess_mixer_get_vol_4bit(mixer->regs[0x36]);
mixer->fm_r = ess_mixer_get_vol_4bit(mixer->regs[0x36] >> 4);
mixer->cd_l = ess_mixer_get_vol_4bit(mixer->regs[0x38]);
mixer->cd_r = ess_mixer_get_vol_4bit(mixer->regs[0x38] >> 4);
mixer->line_l = ess_mixer_get_vol_4bit(mixer->regs[0x3e]);
mixer->line_r = ess_mixer_get_vol_4bit(mixer->regs[0x3e] >> 4);
mixer->mic = sb_att_7dbstep_2bits[(mixer->regs[0x0a] >> 1) & 0x3] / 32768.0;
mixer->output_filter = !(mixer->regs[0xe] & 0x20);
mixer->input_filter = !(mixer->regs[0xc] & 0x20);
mixer->in_filter_freq = ((mixer->regs[0xc] & 0x8) == 0) ? 3200 : 8800;
mixer->stereo = mixer->regs[0xe] & 2;
if (mixer->index == 0xe)
sb_dsp_set_stereo(&ess->dsp, val & 2);
switch (mixer->regs[0xc] & 6) {
case 2:
mixer->input_selector = INPUT_CD_L | INPUT_CD_R;
break;
case 6:
mixer->input_selector = INPUT_LINE_L | INPUT_LINE_R;
break;
default:
mixer->input_selector = INPUT_MIC;
break;
}
/* TODO: pcspeaker volume? Or is it not worth? */
}
}
uint8_t
ess_mixer_read(uint16_t addr, void *priv)
{
ess_t *ess = (ess_t *) priv;
ess_mixer_t *mixer = &ess->mixer_sbpro;
if (!(addr & 1))
return mixer->index;
switch (mixer->index) {
case 0x00:
case 0x04:
case 0x0a:
case 0x0c:
case 0x0e:
case 0x14:
case 0x22:
case 0x26:
case 0x28:
case 0x2e:
case 0x02:
case 0x06:
case 0x30:
case 0x32:
case 0x36:
case 0x38:
case 0x3e:
pclog("ess: Register READ: %02X\t%02X\n", mixer->index, mixer->regs[mixer->index]);
return mixer->regs[mixer->index];
case 0x40:
{
uint8_t val = mixer->ess_id_str[mixer->ess_id_str_pos];
mixer->ess_id_str_pos++;
if (mixer->ess_id_str_pos >= 4)
mixer->ess_id_str_pos = 0;
pclog("ess: ID READ: %02X (pos %d)\n", val, mixer->ess_id_str_pos);
return val;
}
default:
pclog("ess: Unknown register READ: %02X\t%02X\n", mixer->index, mixer->regs[mixer->index]);
break;
}
return 0x0a;
}
void
ess_mixer_reset(ess_t *ess)
{
ess_mixer_write(4, 0, ess);
ess_mixer_write(5, 0, ess);
}
void
ess_get_buffer_sbpro(int32_t *buffer, int len, void *priv)
{
ess_t *ess = (ess_t *) priv;
const ess_mixer_t *mixer = &ess->mixer_sbpro;
double out_l = 0.0;
double out_r = 0.0;
sb_dsp_update(&ess->dsp);
for (int c = 0; c < len * 2; c += 2) {
out_l = 0.0;
out_r = 0.0;
/* TODO: Implement the stereo switch on the mixer instead of on the dsp? */
if (mixer->output_filter) {
out_l += (sb_iir(0, 0, (double) ess->dsp.buffer[c]) * mixer->voice_l) / 3.9;
out_r += (sb_iir(0, 1, (double) ess->dsp.buffer[c + 1]) * mixer->voice_r) / 3.9;
} else {
out_l += (ess->dsp.buffer[c] * mixer->voice_l) / 3.0;
out_r += (ess->dsp.buffer[c + 1] * mixer->voice_r) / 3.0;
}
/* TODO: recording CD, Mic with AGC or line in. Note: mic volume does not affect recording. */
out_l *= mixer->master_l;
out_r *= mixer->master_r;
buffer[c] += (int32_t) out_l;
buffer[c + 1] += (int32_t) out_r;
}
ess->dsp.pos = 0;
}
void
ess_get_music_buffer_sbpro(int32_t *buffer, int len, void *priv)
{
ess_t *ess = (ess_t *) priv;
const ess_mixer_t *mixer = &ess->mixer_sbpro;
double out_l = 0.0;
double out_r = 0.0;
const int32_t *opl_buf = NULL;
opl_buf = ess->opl.update(ess->opl.priv);
sb_dsp_update(&ess->dsp);
for (int c = 0; c < len * 2; c += 2) {
out_l = 0.0;
out_r = 0.0;
{
out_l = (((double) opl_buf[c]) * mixer->fm_l) * 0.7171630859375;
out_r = (((double) opl_buf[c + 1]) * mixer->fm_r) * 0.7171630859375;
if (ess->opl_mix && ess->opl_mixer)
ess->opl_mix(ess->opl_mixer, &out_l, &out_r);
}
/* TODO: recording CD, Mic with AGC or line in. Note: mic volume does not affect recording. */
out_l *= mixer->master_l;
out_r *= mixer->master_r;
buffer[c] += (int32_t) out_l;
buffer[c + 1] += (int32_t) out_r;
}
ess->opl.reset_buffer(ess->opl.priv);
}
void
ess_filter_cd_audio(int channel, double *buffer, void *priv)
{
const ess_t *ess = (ess_t *) priv;
const ess_mixer_t *mixer = &ess->mixer_sbpro;
double c;
double cd = channel ? mixer->cd_r : mixer->cd_l;
double master = channel ? mixer->master_r : mixer->master_l;
if (mixer->output_filter)
c = (sb_iir(2, channel, *buffer) * cd) / 3.9;
else
c = (*buffer * cd) / 3.0;
*buffer = c * master;
}
static void *
ess_1688_init(UNUSED(const device_t *info))
{
/* SB Pro 2 port mappings, 220h or 240h.
2x0 to 2x3 -> FM chip (18 voices)
2x4 to 2x5 -> Mixer interface
2x6, 2xA, 2xC, 2xE -> DSP chip
2x8, 2x9, 388 and 389 FM chip (9 voices)
2x0+10 to 2x0+13 CDROM interface. */
ess_t *ess = calloc(sizeof(ess_t), 1);
uint16_t addr = device_get_config_hex16("base");
fm_driver_get(FM_ESFM, &ess->opl);
sb_dsp_set_real_opl(&ess->dsp, 1);
sb_dsp_init(&ess->dsp, SBPRO2, SB_SUBTYPE_ESS_ES1688, ess);
sb_dsp_setaddr(&ess->dsp, addr);
sb_dsp_setirq(&ess->dsp, device_get_config_int("irq"));
sb_dsp_setdma8(&ess->dsp, device_get_config_int("dma"));
sb_dsp_setdma16_8(&ess->dsp, device_get_config_int("dma"));
sb_dsp_setdma16_supported(&ess->dsp, 0);
ess_mixer_reset(ess);
/* DSP I/O handler is activated in sb_dsp_setaddr */
{
io_sethandler(addr, 0x0004,
ess->opl.read, NULL, NULL,
ess->opl.write, NULL, NULL,
ess->opl.priv);
io_sethandler(addr + 8, 0x0002,
ess->opl.read, NULL, NULL,
ess->opl.write, NULL, NULL,
ess->opl.priv);
io_sethandler(0x0388, 0x0004,
ess->opl.read, NULL, NULL,
ess->opl.write, NULL, NULL,
ess->opl.priv);
}
ess->mixer_enabled = 1;
io_sethandler(addr + 4, 0x0002,
ess_mixer_read, NULL, NULL,
ess_mixer_write, NULL, NULL,
ess);
sound_add_handler(ess_get_buffer_sbpro, ess);
music_add_handler(ess_get_music_buffer_sbpro, ess);
sound_set_cd_audio_filter(ess_filter_cd_audio, ess);
if (device_get_config_int("receive_input"))
midi_in_handler(1, sb_dsp_input_msg, sb_dsp_input_sysex, &ess->dsp);
{
ess->mixer_sbpro.ess_id_str[0] = 0x16;
ess->mixer_sbpro.ess_id_str[1] = 0x88;
ess->mixer_sbpro.ess_id_str[2] = (addr >> 8) & 0xff;
ess->mixer_sbpro.ess_id_str[3] = addr & 0xff;
}
ess->mpu = (mpu_t *) calloc(1, sizeof(mpu_t));
mpu401_init(ess->mpu, 0, 0, M_UART, 1);
sb_dsp_set_mpu(&ess->dsp, ess->mpu);
ess->gameport = gameport_add(&gameport_pnp_device);
ess->gameport_addr = 0x200;
gameport_remap(ess->gameport, ess->gameport_addr);
return ess;
}
void
ess_close(void *priv)
{
ess_t *ess = (ess_t *) priv;
sb_dsp_close(&ess->dsp);
free(ess);
}
void
ess_speed_changed(void *priv)
{
ess_t *ess = (ess_t *) priv;
sb_dsp_speed_changed(&ess->dsp);
}
static const device_config_t ess_config[] = {
{
.name = "base",
.description = "Address",
.type = CONFIG_HEX16,
.default_string = "",
.default_int = 0x220,
.file_filter = "",
.spinner = { 0 },
.selection = {
{
.description = "0x220",
.value = 0x220
},
{
.description = "0x240",
.value = 0x240
},
{ .description = "" }
}
},
{
.name = "irq",
.description = "IRQ",
.type = CONFIG_SELECTION,
.default_string = "",
.default_int = 7,
.file_filter = "",
.spinner = { 0 },
.selection = {
{
.description = "IRQ 2",
.value = 2
},
{
.description = "IRQ 5",
.value = 5
},
{
.description = "IRQ 7",
.value = 7
},
{
.description = "IRQ 10",
.value = 10
},
{ .description = "" }
}
},
{
.name = "dma",
.description = "DMA",
.type = CONFIG_SELECTION,
.default_string = "",
.default_int = 1,
.file_filter = "",
.spinner = { 0 },
.selection = {
{
.description = "DMA 0",
.value = 0
},
{
.description = "DMA 1",
.value = 1
},
{
.description = "DMA 3",
.value = 3
},
{ .description = "" }
}
},
{
.name = "opl",
.description = "Enable OPL",
.type = CONFIG_BINARY,
.default_string = "",
.default_int = 1
},
{
.name = "receive_input",
.description = "Receive input (SB MIDI)",
.type = CONFIG_BINARY,
.default_string = "",
.default_int = 1
},
{ .name = "", .description = "", .type = CONFIG_END }
};
const device_t ess_1688_device = {
.name = "ESS Technology ES1688",
.internal_name = "ess_es1688",
.flags = DEVICE_ISA,
.local = 0,
.init = ess_1688_init,
.close = ess_close,
.reset = NULL,
{ .available = NULL },
.speed_changed = ess_speed_changed,
.force_redraw = NULL,
.config = ess_config
};