// license:BSD-3-Clause
// copyright-holders:R. Belmont, Olivier Galibert, hap
#pragma once
#ifndef __YMF278B_H__
#define __YMF278B_H__
#include "emu.h"
#define YMF278B_STD_CLOCK (33868800) /* standard clock for OPL4 */
#define MCFG_YMF278B_IRQ_HANDLER(_devcb) \
devcb = &ymf278b_device::set_irq_handler(*device, DEVCB_##_devcb);
class ymf278b_device : public device_t,
public device_sound_interface,
public device_memory_interface
{
public:
ymf278b_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
// static configuration helpers
template<class _Object> static devcb_base &set_irq_handler(device_t &device, _Object object) { return downcast<ymf278b_device &>(device).m_irq_handler.set_callback(object); }
DECLARE_READ8_MEMBER( read );
DECLARE_WRITE8_MEMBER( write );
void ymf262_update_request();
protected:
// device-level overrides
virtual void device_config_complete() override;
virtual void device_start() override;
virtual void device_reset() override;
virtual void device_stop() override;
virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
// device_memory_interface overrides
virtual const address_space_config *memory_space_config(address_spacenum spacenum = AS_0) const override { return (spacenum == AS_0) ? &m_space_config : nullptr; }
// sound stream update overrides
virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
private:
struct YMF278BSlot
{
INT16 wave; /* wavetable number */
INT16 F_NUMBER; /* frequency */
INT8 octave; /* octave */
INT8 preverb; /* pseudo-reverb */
INT8 DAMP; /* damping */
INT8 CH; /* output channel */
INT8 LD; /* level direct */
INT8 TL; /* total level */
INT8 pan; /* panpot */
INT8 LFO; /* LFO */
INT8 VIB; /* vibrato */
INT8 AM; /* tremolo */
INT8 AR; /* attack rate */
INT8 D1R; /* decay 1 rate */
INT8 DL; /* decay level */
INT8 D2R; /* decay 2 rate */
INT8 RC; /* rate correction */
INT8 RR; /* release rate */
UINT32 step; /* fixed-point frequency step */
UINT64 stepptr; /* fixed-point pointer into the sample */
INT8 active; /* channel is playing */
INT8 KEY_ON; /* slot keyed on */
INT8 bits; /* width of the samples */
UINT32 startaddr;
UINT32 loopaddr;
UINT32 endaddr;
int env_step;
UINT32 env_vol;
UINT32 env_vol_step;
UINT32 env_vol_lim;
INT8 env_preverb;
int num; /* slot number (for debug only) */
};
int compute_rate(YMF278BSlot *slot, int val);
UINT32 compute_decay_env_vol_step(YMF278BSlot *slot, int val);
void compute_freq_step(YMF278BSlot *slot);
void compute_envelope(YMF278BSlot *slot);
void irq_check();
void A_w(UINT8 reg, UINT8 data);
void B_w(UINT8 reg, UINT8 data);
void retrigger_note(YMF278BSlot *slot);
void C_w(UINT8 reg, UINT8 data);
void timer_busy_start(int is_pcm);
void precompute_rate_tables();
void register_save_state();
// internal state
UINT8 m_pcmregs[256];
YMF278BSlot m_slots[24];
INT8 m_wavetblhdr;
INT8 m_memmode;
INT32 m_memadr;
UINT8 m_status_busy, m_status_ld;
emu_timer *m_timer_busy;
emu_timer *m_timer_ld;
UINT8 m_exp;
INT32 m_fm_l, m_fm_r;
INT32 m_pcm_l, m_pcm_r;
attotime m_timer_base;
UINT8 m_timer_a_count, m_timer_b_count;
UINT8 m_enable, m_current_irq;
int m_irq_line;
UINT8 m_port_C, m_port_AB, m_lastport;
// precomputed tables
UINT32 m_lut_ar[64]; // attack rate
UINT32 m_lut_dr[64]; // decay rate
INT32 m_volume[256*4]; // precalculated attenuation values with some margin for envelope and pan levels
int m_pan_left[16],m_pan_right[16]; // pan volume offsets
INT32 m_mix_level[8];
emu_timer *m_timer_a, *m_timer_b;
int m_clock;
sound_stream * m_stream;
std::unique_ptr<INT32[]> m_mix_buffer;
direct_read_data * m_direct;
const address_space_config m_space_config;
devcb_write_line m_irq_handler;
UINT8 m_last_fm_data;
// ymf262
void *m_ymf262;
sound_stream * m_stream_ymf262;
};
extern const device_type YMF278B;
#endif /* __YMF278B_H__ */