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// license:BSD-3-Clause
// copyright-holders:Aaron Giles
#ifndef MAME_SOUND_HC55516_H
#define MAME_SOUND_HC55516_H
#pragma once
class hc55516_device : public device_t, public device_sound_interface
{
public:
hc55516_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
/* sets the digit (0 or 1) */
void digit_w(int digit);
/* sets the clock state (0 or 1, clocked on the rising edge) */
void clock_w(int state);
/* returns whether the clock is currently LO or HI */
int clock_state_r();
protected:
hc55516_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock);
// device-level overrides
virtual void device_start() override;
virtual void device_reset() 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;
void start_common(uint8_t _shiftreg_mask, int _active_clock_hi);
// internal state
sound_stream *m_channel;
int m_active_clock_hi;
uint8_t m_shiftreg_mask;
uint8_t m_last_clock_state;
uint8_t m_digit;
uint8_t m_new_digit;
uint8_t m_shiftreg;
stream_buffer::sample_t m_curr_sample;
stream_buffer::sample_t m_next_sample;
uint32_t m_update_count;
double m_filter;
double m_integrator;
double m_charge;
double m_decay;
double m_leak;
inline int is_external_oscillator();
inline int is_active_clock_transition(int clock_state);
inline int current_clock_state();
void process_digit();
};
class mc3417_device : public hc55516_device
{
public:
mc3417_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
protected:
// device-level overrides
virtual void device_start() 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;
};
class mc3418_device : public hc55516_device
{
public:
mc3418_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
protected:
// device-level overrides
virtual void device_start() 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;
};
DECLARE_DEVICE_TYPE(HC55516, hc55516_device)
DECLARE_DEVICE_TYPE(MC3417, mc3417_device)
DECLARE_DEVICE_TYPE(MC3418, mc3418_device)
#endif // MAME_SOUND_HC55516_H
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