// license:BSD-3-Clause // copyright-holders:Aaron Giles #ifndef MAME_SOUND_CEM3394_H #define MAME_SOUND_CEM3394_H #pragma once #define CEM3394_EXT_INPUT(_name) void _name(int count, short *buffer) class cem3394_device : public device_t, public device_sound_interface { public: static constexpr unsigned SAMPLE_RATE = 44100*4; // inputs enum { VCO_FREQUENCY = 0, MODULATION_AMOUNT, WAVE_SELECT, PULSE_WIDTH, MIXER_BALANCE, FILTER_RESONANCE, FILTER_FREQENCY, FINAL_GAIN }; typedef device_delegate ext_input_delegate; cem3394_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); template void set_ext_input_callback(T &&... args) { m_ext_cb.set(std::forward(args)...); } void set_vco_zero_freq(double freq) { m_vco_zero_freq = freq; } void set_filter_zero_freq(double freq) { 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: // VCO_FREQUENCY: frequency in Hz // MODULATION_AMOUNT: scale factor, 0.0 to 2.0 // WAVE_SELECT: voltage from this line // PULSE_WIDTH: width fraction, from 0.0 to 1.0 // MIXER_BALANCE: balance, from -1.0 to 1.0 // FILTER_RESONANCE: resonance, from 0.0 to 1.0 // FILTER_FREQENCY: frequency, in Hz // FINAL_GAIN: gain, in dB double get_parameter(int input); private: double compute_db(double voltage); uint32_t compute_db_volume(double voltage); private: 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_t m_wave_select; /* flags which waveforms are enabled */ uint32_t m_volume; /* linear overall volume (0-256) */ uint32_t m_mixer_internal; /* linear internal volume (0-256) */ uint32_t m_mixer_external; /* linear external volume (0-256) */ uint32_t m_position; /* current VCO frequency position (0.FRACTION_BITS) */ uint32_t m_step; /* per-sample VCO step (0.FRACTION_BITS) */ uint32_t m_filter_position; /* current filter frequency position (0.FRACTION_BITS) */ uint32_t m_filter_step; /* per-sample filter step (0.FRACTION_BITS) */ uint32_t m_modulation_depth; /* fraction of total by which we modulate (0.FRACTION_BITS) */ int16_t m_last_ext; /* last external sample we read */ uint32_t 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; }; DECLARE_DEVICE_TYPE(CEM3394, cem3394_device) #endif // MAME_SOUND_CEM3394_H