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77 lines
2.3 KiB
C++
77 lines
2.3 KiB
C++
//
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// SID.cpp
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// Clock Signal
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//
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// Created by Thomas Harte on 07/11/2025.
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// Copyright © 2025 Thomas Harte. All rights reserved.
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//
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#include "SID.hpp"
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using namespace MOS::SID;
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SID::SID(Concurrency::AsyncTaskQueue<false> &audio_queue) : audio_queue_(audio_queue) {}
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void SID::write(const Numeric::SizedInt<5> address, const uint8_t value) {
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audio_queue_.enqueue([&] {
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switch(address.get()) {
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case 0x00: case 0x07: case 0x0e: voices_[address.get() / 7].pitch.load<0>(value); break;
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case 0x01: case 0x08: case 0x0f: voices_[address.get() / 7].pitch.load<8>(value); break;
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case 0x02: case 0x09: case 0x10: voices_[address.get() / 7].pulse_width.load<0>(value); break;
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case 0x03: case 0x0a: case 0x11: voices_[address.get() / 7].pulse_width.load<8>(value); break;
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case 0x04: case 0x0b: case 0x12: voices_[address.get() / 7].control = value; break;
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case 0x05: case 0x0c: case 0x13:
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voices_[address.get() / 7].attack = value >> 4;
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voices_[address.get() / 7].decay = value;
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break;
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case 0x06: case 0x0d: case 0x14:
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voices_[address.get() / 7].sustain = value >> 4;
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voices_[address.get() / 7].release = value;
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break;
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}
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});
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}
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uint8_t SID::read(const Numeric::SizedInt<5> address) {
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(void)address;
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return 0xff;
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}
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void SID::set_sample_volume_range(const std::int16_t range) {
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(void)range;
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}
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bool SID::is_zero_level() const {
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return true;
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}
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template <Outputs::Speaker::Action action>
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void SID::apply_samples(const std::size_t number_of_samples, Outputs::Speaker::MonoSample *const target) {
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for(std::size_t c = 0; c < number_of_samples; c++) {
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// Advance phase.
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voices_[0].update();
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voices_[1].update();
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voices_[2].update();
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// Apply hard synchronisations.
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voices_[0].synchronise(voices_[2]);
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voices_[1].synchronise(voices_[0]);
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voices_[2].synchronise(voices_[1]);
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// TODO: advance ADSR.
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// TODO: inspect enabled wave types (and volumes) to complete digital path.
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// TODO: apply filter.
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}
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(void)number_of_samples;
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(void)target;
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}
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template void SID::apply_samples<Outputs::Speaker::Action::Mix>(
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std::size_t, Outputs::Speaker::MonoSample *);
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template void SID::apply_samples<Outputs::Speaker::Action::Store>(
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std::size_t, Outputs::Speaker::MonoSample *);
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template void SID::apply_samples<Outputs::Speaker::Action::Ignore>(
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std::size_t, Outputs::Speaker::MonoSample *);
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