375 lines
9.3 KiB
C++
375 lines
9.3 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.
|
|
*
|
|
* Interface to the YMFM emulator.
|
|
*
|
|
*
|
|
* Authors: Adrien Moulin, <adrien@elyosh.org>
|
|
*
|
|
* Copyright 2022 Adrien Moulin.
|
|
*/
|
|
|
|
#include <cstdint>
|
|
#include <cstdio>
|
|
#include <cstdlib>
|
|
#include <cstring>
|
|
#include "ymfm/ymfm_opl.h"
|
|
|
|
extern "C" {
|
|
#include <86box/86box.h>
|
|
#include <86box/timer.h>
|
|
#include <86box/device.h>
|
|
#include <86box/sound.h>
|
|
#include <86box/snd_opl.h>
|
|
}
|
|
|
|
#define RSM_FRAC 10
|
|
|
|
enum {
|
|
FLAG_CYCLES = (1 << 0)
|
|
};
|
|
|
|
class YMFMChipBase
|
|
{
|
|
public:
|
|
YMFMChipBase(uint32_t clock, fm_type type, uint32_t samplerate)
|
|
: m_buf_pos(0), m_flags(0), m_type(type)
|
|
{
|
|
memset(m_buffer, 0, sizeof(m_buffer));
|
|
}
|
|
|
|
virtual ~YMFMChipBase()
|
|
{
|
|
}
|
|
|
|
fm_type type() const { return m_type; }
|
|
int8_t flags() const { return m_flags; }
|
|
void set_do_cycles(int8_t do_cycles) { do_cycles ? m_flags |= FLAG_CYCLES : m_flags &= ~FLAG_CYCLES; }
|
|
int32_t *buffer() const { return (int32_t *)m_buffer; }
|
|
void reset_buffer() { m_buf_pos = 0; }
|
|
|
|
virtual uint32_t sample_rate() const = 0;
|
|
|
|
virtual void write(uint16_t addr, uint8_t data) = 0;
|
|
virtual void generate(int32_t *data, uint32_t num_samples) = 0;
|
|
virtual void generate_resampled(int32_t *data, uint32_t num_samples) = 0;
|
|
virtual int32_t * update() = 0;
|
|
virtual uint8_t read(uint16_t addr) = 0;
|
|
|
|
protected:
|
|
int32_t m_buffer[SOUNDBUFLEN * 2];
|
|
int m_buf_pos;
|
|
int8_t m_flags;
|
|
fm_type m_type;
|
|
};
|
|
|
|
template <typename ChipType>
|
|
class YMFMChip : public YMFMChipBase, public ymfm::ymfm_interface
|
|
{
|
|
public:
|
|
YMFMChip(uint32_t clock, fm_type type, uint32_t samplerate)
|
|
: YMFMChipBase(clock, type, samplerate)
|
|
, m_chip(*this)
|
|
, m_clock(clock)
|
|
, m_samplecnt(0)
|
|
{
|
|
memset(m_samples, 0, sizeof(m_samples));
|
|
memset(m_oldsamples, 0, sizeof(m_oldsamples));
|
|
m_rateratio = (samplerate << RSM_FRAC) / m_chip.sample_rate(m_clock);
|
|
m_clock_us = 1000000 / (double) m_clock;
|
|
m_subtract[0] = 80.0;
|
|
m_subtract[1] = 320.0;
|
|
m_type = type;
|
|
|
|
timer_add(&m_timers[0], YMFMChip::timer1, this, 0);
|
|
timer_add(&m_timers[1], YMFMChip::timer2, this, 0);
|
|
}
|
|
|
|
virtual uint32_t sample_rate() const override
|
|
{
|
|
return m_chip.sample_rate(m_clock);
|
|
}
|
|
|
|
virtual void ymfm_set_timer(uint32_t tnum, int32_t duration_in_clocks) override
|
|
{
|
|
if (tnum > 1)
|
|
return;
|
|
|
|
pc_timer_t *timer = &m_timers[tnum];
|
|
if (duration_in_clocks < 0)
|
|
timer_stop(timer);
|
|
else {
|
|
double period = m_clock_us * duration_in_clocks;
|
|
if (period < m_subtract[tnum])
|
|
m_engine->engine_timer_expired(tnum);
|
|
else
|
|
timer_on_auto(timer, period);
|
|
}
|
|
}
|
|
|
|
virtual void generate(int32_t *data, uint32_t num_samples) override
|
|
{
|
|
for (uint32_t i = 0; i < num_samples; i++) {
|
|
m_chip.generate(&m_output);
|
|
if (ChipType::OUTPUTS == 1) {
|
|
*data++ = m_output.data[0];
|
|
*data++ = m_output.data[0];
|
|
} else {
|
|
*data++ = m_output.data[0];
|
|
*data++ = m_output.data[1 % ChipType::OUTPUTS];
|
|
}
|
|
}
|
|
}
|
|
|
|
virtual void generate_resampled(int32_t *data, uint32_t num_samples) override
|
|
{
|
|
for (uint32_t i = 0; i < num_samples; i++) {
|
|
while (m_samplecnt >= m_rateratio) {
|
|
m_oldsamples[0] = m_samples[0];
|
|
m_oldsamples[1] = m_samples[1];
|
|
m_chip.generate(&m_output);
|
|
if (ChipType::OUTPUTS == 1) {
|
|
m_samples[0] = m_output.data[0];
|
|
m_samples[1] = m_output.data[0];
|
|
} else {
|
|
m_samples[0] = m_output.data[0];
|
|
m_samples[1] = m_output.data[1 % ChipType::OUTPUTS];
|
|
}
|
|
m_samplecnt -= m_rateratio;
|
|
}
|
|
|
|
*data++ = ((int32_t) ((m_oldsamples[0] * (m_rateratio - m_samplecnt)
|
|
+ m_samples[0] * m_samplecnt)
|
|
/ m_rateratio));
|
|
*data++ = ((int32_t) ((m_oldsamples[1] * (m_rateratio - m_samplecnt)
|
|
+ m_samples[1] * m_samplecnt)
|
|
/ m_rateratio));
|
|
|
|
m_samplecnt += 1 << RSM_FRAC;
|
|
}
|
|
}
|
|
|
|
virtual int32_t *update() override
|
|
{
|
|
if (m_buf_pos >= sound_pos_global)
|
|
return m_buffer;
|
|
|
|
generate_resampled(&m_buffer[m_buf_pos * 2], sound_pos_global - m_buf_pos);
|
|
|
|
for (; m_buf_pos < sound_pos_global; m_buf_pos++) {
|
|
m_buffer[m_buf_pos * 2] /= 2;
|
|
m_buffer[(m_buf_pos * 2) + 1] /= 2;
|
|
}
|
|
|
|
return m_buffer;
|
|
}
|
|
|
|
virtual void write(uint16_t addr, uint8_t data) override
|
|
{
|
|
m_chip.write(addr, data);
|
|
}
|
|
|
|
virtual uint8_t read(uint16_t addr) override
|
|
{
|
|
return m_chip.read(addr);
|
|
}
|
|
|
|
virtual uint32_t get_special_flags(void) override
|
|
{
|
|
return ((m_type == FM_YMF262) || (m_type == FM_YMF289B)) ? 0x8000 : 0x0000;
|
|
}
|
|
|
|
static void timer1(void *priv)
|
|
{
|
|
YMFMChip<ChipType> *drv = (YMFMChip<ChipType> *) priv;
|
|
drv->m_engine->engine_timer_expired(0);
|
|
}
|
|
|
|
static void timer2(void *priv)
|
|
{
|
|
YMFMChip<ChipType> *drv = (YMFMChip<ChipType> *) priv;
|
|
drv->m_engine->engine_timer_expired(1);
|
|
}
|
|
|
|
private:
|
|
ChipType m_chip;
|
|
uint32_t m_clock;
|
|
double m_clock_us, m_subtract[2];
|
|
typename ChipType::output_data m_output;
|
|
pc_timer_t m_timers[2];
|
|
|
|
// Resampling
|
|
int32_t m_rateratio;
|
|
int32_t m_samplecnt;
|
|
int32_t m_oldsamples[2];
|
|
int32_t m_samples[2];
|
|
};
|
|
|
|
extern "C"
|
|
{
|
|
#include <stdarg.h>
|
|
#include <stdint.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <wchar.h>
|
|
#define HAVE_STDARG_H
|
|
|
|
#include "cpu.h"
|
|
#include <86box/86box.h>
|
|
#include <86box/io.h>
|
|
#include <86box/snd_opl.h>
|
|
|
|
#ifdef ENABLE_OPL_LOG
|
|
|
|
static void
|
|
ymfm_log(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
pclog_ex(fmt, ap);
|
|
va_end(ap);
|
|
}
|
|
#else
|
|
# define ymfm_log(fmt, ...)
|
|
#endif
|
|
|
|
static void *
|
|
ymfm_drv_init(const device_t *info)
|
|
{
|
|
YMFMChipBase *fm;
|
|
|
|
switch (info->local) {
|
|
case FM_YM3812:
|
|
default:
|
|
fm = (YMFMChipBase *) new YMFMChip<ymfm::ym3812>(3579545, FM_YM3812, 48000);
|
|
break;
|
|
|
|
case FM_YMF262:
|
|
fm = (YMFMChipBase *) new YMFMChip<ymfm::ymf262>(14318181, FM_YMF262, 48000);
|
|
break;
|
|
|
|
case FM_YMF289B:
|
|
fm = (YMFMChipBase *) new YMFMChip<ymfm::ymf289b>(33868800, FM_YMF289B, 48000);
|
|
break;
|
|
}
|
|
|
|
fm->set_do_cycles(1);
|
|
|
|
return fm;
|
|
}
|
|
|
|
static void
|
|
ymfm_drv_close(void *priv)
|
|
{
|
|
YMFMChipBase *drv = (YMFMChipBase *) priv;
|
|
|
|
if (drv != NULL)
|
|
delete(drv);
|
|
}
|
|
|
|
static uint8_t
|
|
ymfm_drv_read(uint16_t port, void *priv)
|
|
{
|
|
YMFMChipBase *drv = (YMFMChipBase *) priv;
|
|
|
|
if (drv->flags() & FLAG_CYCLES) {
|
|
cycles -= ((int) (isa_timing * 8));
|
|
}
|
|
|
|
uint8_t ret = drv->read(port);
|
|
drv->update();
|
|
|
|
ymfm_log("YMFM read port %04x, status = %02x\n", port, ret);
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
ymfm_drv_write(uint16_t port, uint8_t val, void *priv)
|
|
{
|
|
YMFMChipBase *drv = (YMFMChipBase *) priv;
|
|
ymfm_log("YMFM write port %04x value = %02x\n", port, val);
|
|
drv->write(port, val);
|
|
drv->update();
|
|
}
|
|
|
|
static int32_t *
|
|
ymfm_drv_update(void *priv) {
|
|
YMFMChipBase *drv = (YMFMChipBase *) priv;
|
|
|
|
return drv->update();
|
|
}
|
|
|
|
static void
|
|
ymfm_drv_reset_buffer(void *priv) {
|
|
YMFMChipBase *drv = (YMFMChipBase *) priv;
|
|
|
|
drv->reset_buffer();
|
|
}
|
|
|
|
static void
|
|
ymfm_drv_set_do_cycles(void *priv, int8_t do_cycles)
|
|
{
|
|
YMFMChipBase *drv = (YMFMChipBase *) priv;
|
|
drv->set_do_cycles(do_cycles);
|
|
}
|
|
|
|
const device_t ym3812_ymfm_device = {
|
|
.name = "Yamaha YM3812 OPL2 (YMFM)",
|
|
.internal_name = "ym3812_ymfm",
|
|
.flags = 0,
|
|
.local = FM_YM3812,
|
|
.init = ymfm_drv_init,
|
|
.close = ymfm_drv_close,
|
|
.reset = NULL,
|
|
{ .available = NULL },
|
|
.speed_changed = NULL,
|
|
.force_redraw = NULL,
|
|
.config = NULL
|
|
};
|
|
|
|
const device_t ymf262_ymfm_device = {
|
|
.name = "Yamaha YMF262 OPL3 (YMFM)",
|
|
.internal_name = "ymf262_ymfm",
|
|
.flags = 0,
|
|
.local = FM_YMF262,
|
|
.init = ymfm_drv_init,
|
|
.close = ymfm_drv_close,
|
|
.reset = NULL,
|
|
{ .available = NULL },
|
|
.speed_changed = NULL,
|
|
.force_redraw = NULL,
|
|
.config = NULL
|
|
};
|
|
|
|
const device_t ymf289b_ymfm_device = {
|
|
.name = "Yamaha YMF289B OPL3-L (YMFM)",
|
|
.internal_name = "ymf289b_ymfm",
|
|
.flags = 0,
|
|
.local = FM_YMF289B,
|
|
.init = ymfm_drv_init,
|
|
.close = ymfm_drv_close,
|
|
.reset = NULL,
|
|
{ .available = NULL },
|
|
.speed_changed = NULL,
|
|
.force_redraw = NULL,
|
|
.config = NULL
|
|
};
|
|
|
|
const fm_drv_t ymfm_drv {
|
|
&ymfm_drv_read,
|
|
&ymfm_drv_write,
|
|
&ymfm_drv_update,
|
|
&ymfm_drv_reset_buffer,
|
|
&ymfm_drv_set_do_cycles,
|
|
NULL,
|
|
};
|
|
|
|
}
|