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// license:BSD-3-Clause
// copyright-holders:Ville Linde
/* Ricoh RF5C400 emulator */
#ifndef MAME_SOUND_RF5C400_H
#define MAME_SOUND_RF5C400_H
#pragma once
#include "dirom.h"
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> rf5c400_device
class rf5c400_device : public device_t,
public device_sound_interface,
public device_rom_interface<25, 1, 0, ENDIANNESS_LITTLE>
{
public:
static constexpr feature_type imperfect_features() { return feature::SOUND; } // unemulated and/or unverified effects and envelopes
rf5c400_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
uint16_t rf5c400_r(offs_t offset, uint16_t mem_mask = ~0);
void rf5c400_w(offs_t offset, uint16_t data, uint16_t mem_mask = ~0);
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_clock_changed() override;
// sound stream update overrides
virtual void sound_stream_update(sound_stream &stream, std::vector<read_stream_view> const &inputs, std::vector<write_stream_view> &outputs) override;
// device_rom_interface overrides
virtual void rom_bank_updated() override;
private:
struct rf5c400_channel
{
rf5c400_channel() { }
uint16_t startH = 0;
uint16_t startL = 0;
uint16_t freq = 0;
uint16_t endL = 0;
uint16_t endHloopH = 0;
uint16_t loopL = 0;
uint16_t pan = 0;
uint16_t effect = 0;
uint16_t volume = 0;
uint16_t attack = 0;
uint16_t decay = 0;
uint16_t release = 0;
uint16_t cutoff = 0;
uint64_t pos = 0;
uint64_t step = 0;
uint16_t keyon = 0;
uint8_t env_phase = 0;
double env_level = 0.0;
double env_step = 0.0;
double env_scale = 0.0;
};
class envelope_tables
{
public:
envelope_tables();
void init(uint32_t clock);
double ar(rf5c400_channel const &chan) const { return m_ar[decode80(chan.attack >> 8)]; }
double dr(rf5c400_channel const &chan) const { return m_dr[decode80(chan.decay >> 8)]; }
double rr(rf5c400_channel const &chan) const { return m_rr[decode80(chan.release >> 8)]; }
private:
static constexpr uint8_t decode80(uint8_t val) { return (val & 0x80) ? ((val & 0x7f) + 0x1f) : val; }
double m_ar[0x9f];
double m_dr[0x9f];
double m_rr[0x9f];
};
uint8_t decode80(uint8_t val);
sound_stream *m_stream;
envelope_tables m_env_tables;
rf5c400_channel m_channels[32];
uint16_t m_rf5c400_status;
uint32_t m_ext_mem_address;
uint16_t m_ext_mem_data;
};
DECLARE_DEVICE_TYPE(RF5C400, rf5c400_device)
#endif // MAME_SOUND_RF5C400_H
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