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// license:BSD-3-Clause
// copyright-holders:Aaron Giles
/***************************************************************************
votrax.h
Simple VOTRAX SC-01 simulator based on sample fragments.
***************************************************************************/
#pragma once
#ifndef __VOTRAX_H__
#define __VOTRAX_H__
#include "sound/samples.h"
//**************************************************************************
// INTERFACE CONFIGURATION MACROS
//**************************************************************************
#define MCFG_VOTRAX_SC01_REQUEST_CB(_devcb) \
devcb = &votrax_sc01_device::set_request_callback(*device, DEVCB2_##_devcb);
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> votrax_sc01_device
class votrax_sc01_device : public device_t,
public device_sound_interface
{
public:
// construction/destruction
votrax_sc01_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
template<class _Object> static devcb2_base &set_request_callback(device_t &device, _Object object) { return downcast<votrax_sc01_device &>(device).m_request_cb.set_callback(object); }
// writers
DECLARE_WRITE8_MEMBER( write );
DECLARE_WRITE8_MEMBER( inflection_w );
DECLARE_READ_LINE_MEMBER( request ) { return m_request_state; }
protected:
// device-level overrides
virtual const rom_entry *device_rom_region() const;
virtual void device_start();
virtual void device_reset();
virtual void device_clock_changed();
virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
// device_sound_interface overrides
virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
private:
// internal helpers
void update_subphoneme_clock_period();
static double bits_to_caps(UINT32 value, int caps_count, const double *caps_values);
static void shift_hist(double val, double *hist_array, int hist_size);
static void filter_s_to_z(const double *k, double fs, double *a, double *b);
static double apply_filter(const double *x, const double *y, const double *a, const double *b);
// internal state
sound_stream * m_stream; // output stream
emu_timer * m_phoneme_timer; // phoneme timer
const UINT8 * m_rom; // pointer to our ROM
// inputs
UINT8 m_inflection; // 2-bit inflection value
UINT8 m_phoneme; // 6-bit phoneme value
// outputs
devcb2_write_line m_request_cb; // callback for request
UINT8 m_request_state; // request as seen to the outside world
UINT8 m_internal_request; // request managed by stream timing
// timing circuit
UINT32 m_master_clock_freq; // frequency of the master clock
UINT8 m_master_clock; // master clock
UINT16 m_counter_34; // ripple counter @ 34
UINT8 m_latch_70; // 4-bit latch @ 70
UINT8 m_latch_72; // 4-bit latch @ 72
UINT8 m_beta1; // beta1 clock state
UINT8 m_p2; // P2 clock state
UINT8 m_p1; // P1 clock state
UINT8 m_phi2; // phi2 clock state
UINT8 m_phi1; // phi1 clock state
UINT8 m_phi2_20; // alternate phi2 clock state (20kHz)
UINT8 m_phi1_20; // alternate phi1 clock state (20kHz)
UINT32 m_subphoneme_period; // period of the subphoneme timer
UINT32 m_subphoneme_count; // number of ticks executed already
UINT8 m_clock_88; // subphoneme clock output @ 88
UINT8 m_latch_42; // D flip-flop @ 42
UINT8 m_counter_84; // 4-bit phoneme counter @ 84
UINT8 m_latch_92; // 2-bit latch @ 92
// low parameter clocking
UINT8 m_srff_132; // S/R flip-flop @ 132
UINT8 m_srff_114; // S/R flip-flop @ 114
UINT8 m_srff_112; // S/R flip-flop @ 112
UINT8 m_srff_142; // S/R flip-flop @ 142
UINT8 m_latch_80; // phoneme timing latch @ 80
// glottal circuit
UINT8 m_counter_220; // 4-bit counter @ 220
UINT8 m_counter_222; // 4-bit counter @ 222
UINT8 m_counter_224; // 4-bit counter @ 224
UINT8 m_counter_234; // 4-bit counter @ 234
UINT8 m_counter_236; // 4-bit counter @ 236
UINT8 m_fgate; // FGATE signal
UINT8 m_glottal_sync; // Glottal Sync signal
// transition circuit
UINT8 m_0625_clock; // state of 0.625kHz clock
UINT8 m_counter_46; // 4-bit counter in block @ 46
UINT8 m_latch_46; // 4-bit latch in block @ 46
UINT8 m_ram[8]; // RAM to hold parameters
UINT8 m_latch_168; // 4-bit latch @ 168
UINT8 m_latch_170; // 4-bit latch @ 170
UINT8 m_f1; // latched 4-bit F1 value
UINT8 m_f2; // latched 5-bit F2 value
UINT8 m_fc; // latched 4-bit FC value
UINT8 m_f3; // latched 4-bit F3 value
UINT8 m_f2q; // latched 4-bit F2Q value
UINT8 m_va; // latched 4-bit VA value
UINT8 m_fa; // latched 4-bit FA value
// noise generator circuit
UINT8 m_noise_clock; // clock input to noise generator
UINT32 m_shift_252; // shift register @ 252
UINT8 m_counter_250; // 4-bit counter @ 250
// stages outputs history
double m_ni_hist[4];
double m_no_hist[4];
double m_va_hist[4];
double m_s1_hist[4];
double m_s2g_hist[4];
double m_s2ni_hist[4];
double m_s2n_hist[4];
double m_s2_hist[4];
double m_s3_hist[4];
double m_s4i_hist[4];
double m_s4_hist[4];
// static tables
static const char *const s_phoneme_table[64];
static const double s_glottal_wave[16];
};
//**************************************************************************
// GLOBAL VARIABLES
//**************************************************************************
// device type definition
extern const device_type VOTRAX_SC01;
#endif /* __VOTRAX_H__ */
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