// license:BSD-3-Clause // copyright-holders:Aaron Giles #pragma once #ifndef __CEM3394_H__ #define __CEM3394_H__ #define CEM3394_SAMPLE_RATE (44100*4) // inputs enum { CEM3394_VCO_FREQUENCY = 0, CEM3394_MODULATION_AMOUNT, CEM3394_WAVE_SELECT, CEM3394_PULSE_WIDTH, CEM3394_MIXER_BALANCE, CEM3394_FILTER_RESONANCE, CEM3394_FILTER_FREQENCY, CEM3394_FINAL_GAIN }; typedef device_delegate cem3394_ext_input_delegate; #define CEM3394_EXT_INPUT(_name) void _name(int count, short *buffer) //************************************************************************** // INTERFACE CONFIGURATION MACROS //************************************************************************** #define MCFG_CEM3394_ADD(_tag, _clock) \ MCFG_DEVICE_ADD(_tag, CEM3394, _clock) #define MCFG_CEM3394_REPLACE(_tag, _clock) \ MCFG_DEVICE_REPLACE(_tag, CEM3394, _clock) #define MCFG_CEM3394_EXT_INPUT_CB(_class, _method) \ cem3394_device::set_ext_input_callback(*device, cem3394_ext_input_delegate(&_class::_method, #_class "::" #_method, downcast<_class *>(owner))); #define MCFG_CEM3394_VCO_ZERO(_freq) \ cem3394_device::set_vco_zero_freq(*device, _freq); #define MCFG_CEM3394_FILTER_ZERO(_freq) \ cem3394_device::set_filter_zero_freq(*device, _freq); class cem3394_device : public device_t, public device_sound_interface { public: cem3394_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); ~cem3394_device() { } static void set_ext_input_callback(device_t &device, cem3394_ext_input_delegate callback) { downcast(device).m_ext_cb = callback; } static void set_vco_zero_freq(device_t &device, double freq) { downcast(device).m_vco_zero_freq = freq; } static void set_filter_zero_freq(device_t &device, double freq) { downcast(device).m_filter_zero_freq = freq; } protected: // device-level overrides virtual void device_start() override; // sound stream update overrides virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override; public: // Set the voltage going to a particular parameter void set_voltage(int input, double voltage); // Get the translated parameter associated with the given input as follows: // CEM3394_VCO_FREQUENCY: frequency in Hz // CEM3394_MODULATION_AMOUNT: scale factor, 0.0 to 2.0 // CEM3394_WAVE_SELECT: voltage from this line // CEM3394_PULSE_WIDTH: width fraction, from 0.0 to 1.0 // CEM3394_MIXER_BALANCE: balance, from -1.0 to 1.0 // CEM3394_FILTER_RESONANCE: resonance, from 0.0 to 1.0 // CEM3394_FILTER_FREQENCY: frequency, in Hz // CEM3394_FINAL_GAIN: gain, in dB double get_parameter(int input); private: double compute_db(double voltage); UINT32 compute_db_volume(double voltage); private: cem3394_ext_input_delegate m_ext_cb; /* callback to generate external samples */ sound_stream *m_stream; /* our stream */ double m_vco_zero_freq; /* frequency of VCO at 0.0V */ double m_filter_zero_freq; /* frequency of filter at 0.0V */ double m_values[8]; /* raw values of registers */ UINT8 m_wave_select; /* flags which waveforms are enabled */ UINT32 m_volume; /* linear overall volume (0-256) */ UINT32 m_mixer_internal; /* linear internal volume (0-256) */ UINT32 m_mixer_external; /* linear external volume (0-256) */ UINT32 m_position; /* current VCO frequency position (0.FRACTION_BITS) */ UINT32 m_step; /* per-sample VCO step (0.FRACTION_BITS) */ UINT32 m_filter_position; /* current filter frequency position (0.FRACTION_BITS) */ UINT32 m_filter_step; /* per-sample filter step (0.FRACTION_BITS) */ UINT32 m_modulation_depth; /* fraction of total by which we modulate (0.FRACTION_BITS) */ INT16 m_last_ext; /* last external sample we read */ UINT32 m_pulse_width; /* fractional pulse width (0.FRACTION_BITS) */ double m_inv_sample_rate; int m_sample_rate; std::unique_ptr m_mixer_buffer; std::unique_ptr m_external_buffer; }; extern const device_type CEM3394; #endif /* __CEM3394_H__ */