mirror of
https://github.com/MoleskiCoder/EightBit.git
synced 2024-07-13 09:29:22 +00:00
481 lines
12 KiB
C++
481 lines
12 KiB
C++
#pragma once
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#include <array>
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#include <memory>
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#include <iostream>
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#include <cassert>
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#include <Processor.h>
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namespace EightBit {
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namespace GameBoy {
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class Envelope final {
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public:
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Envelope() {}
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enum Direction { Attenuate, Amplify };
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void reset() {
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m_defaultValue = m_direction = m_stepLength = 0;
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}
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bool zeroed() const {
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return (default() == 0) && (stepLength() == 0) && (direction() == Attenuate);
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}
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int default() const { return m_defaultValue; }
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void setDefault(int value) { m_defaultValue = value; }
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Direction direction() const { return (Direction)m_direction; }
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void setDirection(int value) { m_direction = value; }
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void setDirection(Direction value) { setDirection((int)value); }
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int stepLength() const { return m_stepLength; }
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void setStepLength(int value) { m_stepLength = value; }
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void dump() const {
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std::cout << "Envelope: default=" << default() << ",direction=" << direction() << ",step length=" << stepLength() << std::endl;
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}
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private:
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int m_defaultValue;
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int m_direction;
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int m_stepLength;
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};
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class Sweep final {
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public:
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Sweep() {}
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enum Direction { Addition, Subtraction };
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void reset() {
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m_time = m_direction = m_shift = 0;
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}
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bool zeroed() const {
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return (time() == 0) && (shift() == 0) && (direction() == Addition);
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}
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int time() const { return m_time; }
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void setTime(int value) { m_time = value; }
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Direction direction() const { return (Direction)m_direction; }
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void setDirection(int value) { m_direction = value; }
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void setDirection(Direction value) { setDirection((int)value); }
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int shift() const { return m_shift; }
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void setShift(int value) { m_shift = value; }
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void dump() const {
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std::cout << "Sweep: time=" << time() << ",direction=" << direction() << ",shift=" << shift() << std::endl;
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}
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private:
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int m_time;
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int m_direction;
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int m_shift;
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};
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class AudioVoice {
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public:
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AudioVoice() {}
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virtual void reset() {
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m_counterContinuous = m_initialise = 0;
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}
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virtual bool zeroed() const {
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return !initialise() && (type() == Continuous);
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}
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enum Type { Continuous, Counter };
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Type type() const { return (Type)m_counterContinuous; }
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void setType(int value) { m_counterContinuous = value; }
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void setType(Type value) { setType((int)value); }
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bool initialise() const { return !!m_initialise; }
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void setInitialise(bool value) { m_initialise = value; }
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virtual void dump() const {
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std::cout << "Audio Voice: type=" << type() << ",initialise=" << initialise() << std::endl;
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}
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private:
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int m_counterContinuous;
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int m_initialise;
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};
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class WaveVoice : public AudioVoice {
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public:
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WaveVoice() {}
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virtual void reset() override {
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AudioVoice::reset();
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m_frequencyLowOrder = m_frequencyHighOrder = 0;
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}
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virtual bool zeroed() const override {
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return AudioVoice::zeroed() && (frequency() == 0);
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}
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int frequencyLowOrder() const { return m_frequencyLowOrder; }
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void setFrequencyLowOrder(int value) {
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assert(value < Processor::Bit8);
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m_frequencyLowOrder = value;
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}
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int frequencyHighOrder() const { return m_frequencyHighOrder; }
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void setFrequencyHighOrder(int value) {
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assert(value < Processor::Bit3);
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m_frequencyHighOrder = value;
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}
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int frequency() const {
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return (m_frequencyHighOrder << 8) | m_frequencyLowOrder;
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}
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int hertz() const {
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// f = 4194304 / (4 x 8 x (2048 - X)) Hz
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auto clock = 4 * 1024 * 1024;
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auto division = 4 * 8 * (2048 - frequency());
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return clock / division;
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}
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void setFrequency(int value) {
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assert(value < Processor::Bit11);
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m_frequencyHighOrder = (value >> 8) & Processor::Mask3;
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m_frequencyLowOrder = value & Processor::Mask8;
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}
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virtual void dump() const override {
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AudioVoice::dump();
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std::cout << "Wave Voice: frequency=" << frequency() << " (" << hertz() << ")" << std::endl;
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}
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private:
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int m_frequencyLowOrder; // 8 bits
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int m_frequencyHighOrder; // 3 bits
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};
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class RectangularVoice : public WaveVoice {
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public:
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RectangularVoice() {}
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virtual void reset() override {
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WaveVoice::reset();
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m_waveFormDutyCycle = m_soundLength = 0;
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}
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virtual bool zeroed() const override {
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return WaveVoice::zeroed() && (waveFormDutyCycle() == 0) && (length() == 0);
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}
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int waveFormDutyCycle() const { return m_waveFormDutyCycle; }
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void setWaveFormDutyCycle(int value) { m_waveFormDutyCycle = value; }
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int length() const { return m_soundLength; }
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void setLength(int value) { m_soundLength = value; }
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virtual void dump() const override {
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WaveVoice::dump();
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std::cout << "Rectangular Voice: wave form duty=" << waveFormDutyCycle() << ",length=" << length() << std::endl;
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}
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private:
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int m_waveFormDutyCycle;
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int m_soundLength;
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};
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// NR2X
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class EnvelopedRectangularVoice : public RectangularVoice {
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public:
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EnvelopedRectangularVoice() {}
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virtual void reset() override {
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RectangularVoice::reset();
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m_envelope.reset();
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}
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virtual bool zeroed() const override {
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return RectangularVoice::zeroed() && m_envelope.zeroed();
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}
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Envelope& envelope() { return m_envelope; }
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virtual void dump() const override {
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RectangularVoice::dump();
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m_envelope.dump();
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}
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private:
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Envelope m_envelope;
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};
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// NR1X
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class SweptEnvelopedRectangularVoice : public EnvelopedRectangularVoice {
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public:
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SweptEnvelopedRectangularVoice() {}
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virtual void reset() override {
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EnvelopedRectangularVoice::reset();
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m_sweep.reset();
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}
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virtual bool zeroed() const override {
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return EnvelopedRectangularVoice::zeroed() && m_sweep.zeroed();
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}
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Sweep& sweep() { return m_sweep; }
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virtual void dump() const override {
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EnvelopedRectangularVoice::dump();
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m_sweep.dump();
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}
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private:
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Sweep m_sweep;
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};
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// NR3X
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class UserDefinedWaveVoice : public WaveVoice {
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public:
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UserDefinedWaveVoice() {}
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virtual void reset() override {
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WaveVoice::reset();
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m_enabled = m_soundLength = m_outputLevel = 0;
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for (auto& datum : m_waveData)
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datum = 0;
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}
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virtual bool zeroed() const override {
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bool dataZeroed = true;
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for (const auto& datum : m_waveData) {
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if (datum != 0) {
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dataZeroed = false;
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break;
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}
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}
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return
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WaveVoice::zeroed()
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&& dataZeroed
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&& !enabled()
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&& (length() == 0)
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&& (level() == 0);
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}
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bool enabled() const { return !!m_enabled; }
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void setEnabled(bool value) { m_enabled = value; }
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int length() const { return m_soundLength; }
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void setLength(int value) { m_soundLength = value; }
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int level() const { return m_outputLevel; }
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void setLevel(int value) { m_outputLevel = value; }
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int packedWaveDatum(int i) const {
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assert(i < 16);
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return m_waveData[i];
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}
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void setPackedWaveDatum(int i, uint8_t value) {
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assert(i < 16);
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m_waveData[i] = value;
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}
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int waveDatum(int i) const {
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assert(i < 32);
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const auto packed = packedWaveDatum(i >> 1);
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return i & 1 ? Processor::lowNibble(packed) : Processor::highNibble(packed);
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}
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private:
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int m_enabled;
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int m_soundLength;
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int m_outputLevel;
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std::array<uint8_t, 16> m_waveData;
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};
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// NR4X
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class WhiteNoiseWaveVoice : public AudioVoice {
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public:
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WhiteNoiseWaveVoice() {}
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virtual void reset() override {
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AudioVoice::reset();
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m_envelope.reset();
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m_soundLength = m_polynomialShiftClockFrequency = m_polynomialCounterSteps = m_frequencyDivisionRatio = 0;
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}
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virtual bool zeroed() const override {
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return
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AudioVoice::zeroed()
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&& m_envelope.zeroed()
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&& (length() == 0)
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&& (polynomialShiftClockFrequency() == 0)
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&& (polynomialCounterSteps() == 0)
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&& (frequencyDivisionRatio() == 0);
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}
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Envelope& envelope() { return m_envelope; }
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int length() const { return m_soundLength; }
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void setLength(int value) { m_soundLength = value; }
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int polynomialShiftClockFrequency() const { return m_polynomialShiftClockFrequency; }
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void setPolynomialShiftClockFrequency(int value) { m_polynomialShiftClockFrequency = value; }
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int polynomialCounterSteps() const { return m_polynomialCounterSteps; }
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void setPolynomialCounterSteps(int value) { m_polynomialCounterSteps = value; }
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int frequencyDivisionRatio() const { return m_frequencyDivisionRatio; }
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void setFrequencyDivisionRatio(int value) { m_frequencyDivisionRatio = value; }
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private:
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Envelope m_envelope;
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int m_soundLength;
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int m_polynomialShiftClockFrequency;
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int m_polynomialCounterSteps;
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int m_frequencyDivisionRatio;
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};
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class OutputChannel final {
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public:
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OutputChannel() {}
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void reset() {
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m_vin = false;
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m_outputLevel = 0;
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for (auto& outputVoice : m_outputVoices)
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outputVoice = false;
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}
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bool zeroed() const {
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return
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!vin()
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&& outputLevel() == 0
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&& !m_outputVoices[0] && !m_outputVoices[1] && !m_outputVoices[2] && !m_outputVoices[3];
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}
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bool vin() const { return m_vin; }
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void setVin(bool value) { m_vin = value; }
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int outputLevel() const { return m_outputLevel; }
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void setOutputLevel(int value) { m_outputLevel = value; }
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bool& outputVoice(int voice) { return m_outputVoices[voice]; }
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bool& outputVoice1() { return m_outputVoices[0]; }
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bool& outputVoice2() { return m_outputVoices[1]; }
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bool& outputVoice3() { return m_outputVoices[2]; }
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bool& outputVoice4() { return m_outputVoices[3]; }
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void dump() const {
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std::cout
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<< "Output channel: "
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<< "Vin:" << vin()
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<< ",Output level=" << outputLevel()
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<< ",Voices:" << (int)m_outputVoices[0] << (int)m_outputVoices[1] << (int)m_outputVoices[2] << (int)m_outputVoices[3]
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<< std::endl;
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}
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private:
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bool m_vin;
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int m_outputLevel;
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std::array<bool, 4> m_outputVoices;
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};
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class Audio final {
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public:
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Audio()
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: m_enabled(false) {
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m_voices[0] = std::make_shared<SweptEnvelopedRectangularVoice>();
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m_voices[1] = std::make_shared<EnvelopedRectangularVoice>();
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m_voices[2] = std::make_shared<UserDefinedWaveVoice>();
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m_voices[3] = std::make_shared<WhiteNoiseWaveVoice>();
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}
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std::shared_ptr<AudioVoice> voice(int i) { return m_voices[i]; }
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SweptEnvelopedRectangularVoice* voice1() {
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return (SweptEnvelopedRectangularVoice*)voice(0).get();
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}
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EnvelopedRectangularVoice* voice2() {
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return (EnvelopedRectangularVoice*)voice(1).get();
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}
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UserDefinedWaveVoice* voice3() {
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return (UserDefinedWaveVoice*)voice(2).get();
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}
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WhiteNoiseWaveVoice* voice4() {
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return (WhiteNoiseWaveVoice*)voice(3).get();
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}
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OutputChannel& channel(int i) { return m_channels[i]; }
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OutputChannel& channel1() { return channel(0); }
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OutputChannel& channel2() { return channel(1); }
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bool enabled() const { return m_enabled; }
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void setEnabled(bool value) {
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m_enabled = value;
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if (!enabled())
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reset();
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}
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void reset() {
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m_enabled = false;
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for (auto voice : m_voices)
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voice->reset();
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for (auto& channel : m_channels)
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channel.reset();
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}
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bool zeroed() const {
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auto channelsZeroed = m_channels[0].zeroed() && m_channels[1].zeroed();
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auto voice1Zero = m_voices[0]->zeroed();
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auto voice2Zero = m_voices[1]->zeroed();
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auto voice3Zero = m_voices[2]->zeroed();
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auto voice4Zero = m_voices[3]->zeroed();
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auto voicesZeroed = voice1Zero && voice2Zero && voice3Zero && voice4Zero;
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return !enabled() && channelsZeroed && voicesZeroed;
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}
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void dumpVoice(int i) const {
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std::cout << "** Voice " << i + 1 << std::endl;
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m_voices[i]->dump();
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}
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void dumpVoices() const {
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for (int i = 0; i < 4; ++i)
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dumpVoice(i);
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}
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void dumpChannel(int i) const {
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std::cout << "** Channel " << i + 1 << std::endl;
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m_channels[i].dump();
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}
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void dumpChannels() const {
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for (int i = 0; i < 2; ++i)
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dumpChannel(i);
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}
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void dump() const {
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dumpVoices();
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dumpChannels();
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}
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private:
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std::array<std::shared_ptr<AudioVoice>, 4> m_voices;
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std::array<OutputChannel, 2> m_channels;
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bool m_enabled;
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};
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}
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} |