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b0fb1e3351
starting to working of voices and so on BRR, Envelopes, Gauss and Timers as they use each others
450 lines
15 KiB
C++
450 lines
15 KiB
C++
//
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// Created by Melefo on 28/01/2020.
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//
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#ifndef COMSQUARE_DSP_HPP
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#define COMSQUARE_DSP_HPP
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#include <cstdint>
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#include <array>
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#include "../../Memory/AMemory.hpp"
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namespace ComSquare::APU
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{
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class APU;
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struct MemoryMap;
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}
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namespace ComSquare::APU::DSP
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{
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enum Envelope : uint {
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Release,
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Attack,
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Decay,
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Sustain
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};
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struct Master {
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//! @brief Main Volume register (MVOL)
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std::array<uint8_t, 2> volume;
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//! @brief Mutes all channel (6th bit FLG)
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bool mute : 1;
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//! @brief Soft reset DSP (7th bit FLG)
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bool reset : 1;
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//! @brief Current sound produced
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std::array<uint16_t, 2> output;
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//! @brief Not used register
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uint8_t unused;
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};
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struct Echo {
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//! @brief Echo Volume register (EVOL)
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std::array<uint8_t , 2> volume;
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//! @brief Echo feedback register (EFB)
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uint8_t feedback;
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//! @brief Echo FIR filter coefficients (COEF)
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std::array<uint8_t, 8> FIR;
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//! @brief Echo data start register (ESA)
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uint8_t data;
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//! @brief Echo delay size register (EDL)
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uint8_t delay;
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//! @brief Echo enabled (5th bit FLG)
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bool enabled = true;
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//! @brief Last sound produced for each voice in each channel
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std::array<std::array<int16_t, 8>, 2> history;
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//! @brief Current sound to echo
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std::array<uint16_t, 2> input;
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//! @brief Current sound echoed produced
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std::array<uint16_t, 2> output;
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};
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struct Noise {
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//! @brief Frequency of white noise (the first 4 bits FLG)
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uint8_t clock : 5;
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//! @brief Linear feedback shift register used to shift final output
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uint16_t lfsr = 0x4000;
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};
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struct BRR {
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//! @brief Offset pointing to sample directory in external RAM (DIR)
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uint8_t offset;
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//! @brief Address of the offset
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uint8_t offsetAddr;
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//! @brief Current address of the BRR in APU's RAM
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uint16_t address;
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//! @brief Next address of the BRR in APU's RAM
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uint16_t nextAddress;
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//! @brief Current value inside BRR
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uint8_t value;
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//! @brief Current header of BRR
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uint8_t header;
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//! @brief Current value of Voice ADSR1 loaded
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uint8_t source;
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};
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struct Latch {
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//! @brief Current voice's adsr1 in use
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uint8_t adsr1;
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//! @brief Envelope value register (ENVX)
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uint8_t envx;
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//! @brief Wave height register (OUTX)
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uint8_t outx;
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//! @brief Current voice's pitch in use
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uint16_t pitch;
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//! @brief Output currently being modified
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uint16_t output;
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};
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struct Voice {
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//! @brief Volume register (VOL)
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std::array<int8_t, 2> volume;
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//! @brief Pitch register (P)
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union {
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struct {
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//! @brief Lower 8 bits of pitch register
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uint8_t pitchL;
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//! @brief Higher 8 bits of pitch register
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uint8_t pitchH;
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};
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uint16_t pitch;
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};
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//! @brief Source number register (SRCN)
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uint8_t srcn;
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union {
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struct {
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//! @brief Envelope register (ADSR)
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uint8_t adsr1;
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//! @brief Envelope controllers register (ADSR)
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uint8_t adsr2;
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};
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uint16_t adsr;
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};
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//! @brief Gain register (GAIN)
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uint8_t gain;
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//! @brief envelope associated with this voice
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uint8_t envx;
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//! @brief Sample end register (ENDX)
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bool endx : 1;
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//! @brief Key On register (KON)
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bool kon : 1;
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//! @brief Key Off register (KOF)
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bool kof : 1;
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//! @brief Pitch modulation register (PMON)
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bool pmon : 1;
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//! @brief Noise enable register (NON)
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bool non : 1;
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//! @brief Echo enable register (EON)
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bool eon : 1;
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//! @brief Check if voice is in setup phase
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uint8_t konDelay;
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//! @brief Check if the output will be echoed
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bool echo;
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//! @brief Check if this voice will be looped
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bool loop;
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//! @brief Current BRR associated with this voice
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uint16_t brrAddress;
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//! @brief Current Offset in the BRR block
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uint8_t brrOffset = 1;
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//! @brief Previous modulation
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bool prevPmon : 1;
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//! @brief temporary NON register value
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bool tempNon : 1;
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//! @brief temporary Key On register value
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bool tempKon : 1;
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//! @brief temporary Key Off register value
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bool tempKof : 1;
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//! @brief all samples Decoded from BRR
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std::array<uint16_t, 12> samples;
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//! @brief Offset of current sample in samples buffer
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uint8_t sampleOffset;
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//! @brief Current envelope level
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uint16_t envelope;
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//! @brief Second envelope level used to make "special" waveforms
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uint16_t hiddenEnvelope;
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//! @brief current envelope Mode
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Envelope envelopeMode;
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//! @brief Relative fractional position in sample
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uint16_t gaussOffset;
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};
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//! @brief Current state of the DSP
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struct State
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{
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//! @brief Current voice modification to do
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uint8_t voice = 0;
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//! @brief Current buffer of samples
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int16_t *buffer;
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//! @brief Limit of the buffer
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int16_t *bufferEnd;
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//! @brief Beginning of the buffer
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int16_t *bufferStart;
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};
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struct Timer {
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//! @brief Ticks remaining in the timer
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uint16_t counter;
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//! @brief output every samples
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bool sample = true;
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};
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/*//! @brief All the registers of the DSP
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struct Registers {
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//! @brief Main Volume register
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std::array<uint8_t, 2> mVol; //master.volume
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//! @brief Echo Volume register
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std::array<uint8_t, 2> eVol; //echo.volume
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//! @brief Flags register
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union {
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struct {
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uint8_t noiseClock : 5; //noise.frequency
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bool ecen : 1; //echo.readonly
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bool mute : 1; //master.mute
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bool reset : 1; //master.reset
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};
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uint8_t flg;
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};
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//! @brief Echo feedback register
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uint8_t efb; //echo.feedback
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//! @brief Not used register
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uint8_t unused;
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//! @brief Source Directory offset register
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uint8_t dir; //brr.bank
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//! @brief Echo data start register
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uint8_t esa; //echo.bank
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//! @brief Echo delay size register
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uint8_t edl; //echo.delay
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};
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struct BRR {
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//! @brief BRR Header
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union {
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struct {
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//! @brief Shift value range
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unsigned range : 4;
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//! @brief Decompression filter
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unsigned filter : 2;
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//! @brief Flag if the sample loops
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bool loop : 1;
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//! @brief Stop the sample (or restart from loop point)
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bool end : 1;
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};
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uint8_t head;
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};
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//! @brief Sample data inside BRR
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uint64_t block;
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};
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struct Voice {
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//! @brief Volume register
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std::array<uint8_t, 2> volume; //voice.volume
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union {
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struct {
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//! @brief Lower 8 bits of pitch register
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uint8_t pitchL;
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//! @brief Higher 8 bits of pitch register
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uint8_t pitchH;
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};
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uint16_t pitch; //voice.pitch
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};
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//! @brief Source number register
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uint8_t srcn; //voice.source
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union {
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struct {
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//! @brief Envelope register
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uint8_t adsr1; //voice.adsr0
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//! @brief Envelope controllers register
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uint8_t adsr2; //voice.adsr1
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};
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uint16_t envelope;
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};
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//! @brief Gain register
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uint8_t gain; //voice.gain
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//! @brief Envelope value register
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uint8_t envx; //latch.envx
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//! @brief Wave height register
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uint8_t outx; //latch.outx
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//! @brief Key On register
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bool kon : 1; //voice.keyon
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//! @brief Key Off register
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bool kof : 1; //voice.keyoff
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bool keyLatch : 1; //voice._keylatch
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//! @brief Sample end register
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bool endx : 1; //voice._end
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//! @brief Noise enable register
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bool non : 1; //voice.noise
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//! @brief Echo enable register
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bool eon : 1; //voice.echo
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//! @brief Pitch modulation register
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bool pmon : 1; //voice.modulate
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//! @brief Echo FIR filter coefficients
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uint8_t coeff; //echo.fir
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bool latchEon : 1; //voice._echo
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};
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struct Latch
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{
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uint8_t adsr0;
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uint16_t pitch;
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uint16_t output;
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};*/
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class DSP {
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private:
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//! @brief Number of samples per counter event
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std::array<uint16_t, 32> _rateModulus = {
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0, 2048, 1536, 1280, 1024, 768,
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640, 512, 384, 320, 256, 192,
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160, 128, 96, 80, 64, 48,
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40, 32, 24, 20, 16, 12,
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10, 8, 6, 5, 4, 3,
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2, 1
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};
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//! @brief Counter offset
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std::array<uint16_t, 32> _counterOffset = {
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0, 0, 1040, 536, 0, 1040,
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536, 0, 1040, 536, 0, 1040,
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536, 0, 1040, 536, 0, 1040,
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536, 0, 1040, 536, 0, 1040,
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536, 0, 1040, 536, 0, 1040,
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0,0
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};
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//! @brief Gaussian table used for making waves
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std::array<int16_t, 512> _gauss = {
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2,
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2, 2, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 5, 5, 5, 5,
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6, 6, 6, 6, 7, 7, 7, 8, 8, 8, 9, 9, 9, 10, 10, 10,
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11, 11, 11, 12, 12, 13, 13, 14, 14, 15, 15, 15, 16, 16, 17, 17,
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18, 19, 19, 20, 20, 21, 21, 22, 23, 23, 24, 24, 25, 26, 27, 27,
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28, 29, 29, 30, 31, 32, 32, 33, 34, 35, 36, 36, 37, 38, 39, 40,
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41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56,
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58, 59, 60, 61, 62, 64, 65, 66, 67, 69, 70, 71, 73, 74, 76, 77,
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78, 80, 81, 83, 84, 86, 87, 89, 90, 92, 94, 95, 97, 99, 100, 102,
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104, 106, 107, 109, 111, 113, 115, 117, 118, 120, 122, 124, 126, 128, 130, 132,
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134, 137, 139, 141, 143, 145, 147, 150, 152, 154, 156, 159, 161, 163, 166, 168,
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171, 173, 175, 178, 180, 183, 186, 188, 191, 193, 196, 199, 201, 204, 207, 210,
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212, 215, 218, 221, 224, 227, 230, 233, 236, 239, 242, 245, 248, 251, 254, 257,
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260, 263, 267, 270, 273, 276, 280, 283, 286, 290, 293, 297, 300, 304, 307, 311,
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314, 318, 321, 325, 328, 332, 336, 339, 343, 347, 351, 354, 358, 362, 366, 370,
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374, 378, 381, 385, 389, 393, 397, 401, 405, 410, 414, 418, 422, 426, 430, 434,
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439, 443, 447, 451, 456, 460, 464, 469, 473, 477, 482, 486, 491, 495, 499, 504,
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508, 513, 517, 522, 527, 531, 536, 540, 545, 550, 554, 559, 563, 568, 573, 577,
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582, 587, 592, 596, 601, 606, 611, 615, 620, 625, 630, 635, 640, 644, 649, 654,
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659, 664, 669, 674, 678, 683, 688, 693, 698, 703, 708, 713, 718, 723, 728, 732,
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737, 742, 747, 752, 757, 762, 767, 772, 777, 782, 787, 792, 797, 802, 806, 811,
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816, 821, 826, 831, 836, 841, 846, 851, 855, 860, 865, 870, 875, 880, 884, 889,
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894, 899, 904, 908, 913, 918, 923, 927, 932, 937, 941, 946, 951, 955, 960, 965,
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969, 974, 978, 983, 988, 992, 997, 1001, 1005, 1010, 1014, 1019, 1023, 1027, 1032, 1036,
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1040, 1045, 1049, 1053, 1057, 1061, 1066, 1070, 1074, 1078, 1082, 1086, 1090, 1094, 1098, 1102,
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1106, 1109, 1113, 1117, 1121, 1125, 1128, 1132, 1136, 1139, 1143, 1146, 1150, 1153, 1157, 1160,
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1164, 1167, 1170, 1174, 1177, 1180, 1183, 1186, 1190, 1193, 1196, 1199, 1202, 1205, 1207, 1210,
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1213, 1216, 1219, 1221, 1224, 1227, 1229, 1232, 1234, 1237, 1239, 1241, 1244, 1246, 1248, 1251,
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1253, 1255, 1257, 1259, 1261, 1263, 1265, 1267, 1269, 1270, 1272, 1274, 1275, 1277, 1279, 1280,
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1282, 1283, 1284, 1286, 1287, 1288, 1290, 1291, 1292, 1293, 1294, 1295, 1296, 1297, 1297, 1298,
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1299, 1300, 1300, 1301, 1302, 1302, 1303, 1303, 1303, 1304, 1304, 1304, 1304, 1304, 1305, 1305
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};
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//! @brief 8x voices of sample used to make sound
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std::array<Voice, 8> _voices {};
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Master _master {};
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Echo _echo {};
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Noise _noise {};
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BRR _brr {};
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Latch _latch {};
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State _state {};
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Timer _timer {};
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void voiceOutput(Voice &voice, bool channel);
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void voice1(Voice &voice);
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void voice2(Voice &voice);
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void voice3(Voice &voice);
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void voice3a(Voice &voice);
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void voice3b(Voice &voice);
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void voice3c(Voice &voice);
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void voice4(Voice &voice);
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void voice5(Voice &voice);
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void voice6(Voice &voice);
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void voice7(Voice &voice);
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void voice8(Voice &voice);
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void voice9(Voice &voice);
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void echo22();
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void echo23();
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void echo24();
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void echo25();
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void echo26();
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void echo27();
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void echo28();
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void echo29();
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void echo30();
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void misc27();
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void misc28();
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void misc29();
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void misc30();
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int32_t interpolate(const Voice &voice);
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void runEnvelope(Voice &voice);
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void timerTick();
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bool timerPoll(uint32_t rate);
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void decodeBRR(Voice &voice);
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std::weak_ptr<MemoryMap> _map;
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uint8_t _readRAM(uint24_t addr);
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void _writeRAM(uint24_t addr, uint8_t data);
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public:
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DSP(int16_t *buffer, int32_t size, std::weak_ptr<MemoryMap> map);
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DSP(const DSP &) = default;
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DSP &operator=(const DSP &) = default;
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~DSP() = default;
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//! @brief Return all 8 voices from DSP
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const std::array<Voice, 8> &getVoices();
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const Master &getMaster();
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const Echo &getEcho();
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const Noise &getNoise();
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const BRR &getBrr();
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const Latch &getLatch();
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//! @brief Read from the internal DSP register.
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//! @param addr The address to read from. The address 0x0 should refer to the first byte of the register.
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//! @throw InvalidAddress will be thrown if the address is more than $7F (the number of register).
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//! @return Return the value of the register.
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uint8_t read(uint24_t addr);
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//! @brief Write data to the internal DSP register.
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//! @param addr The address to write to. The address 0x0 should refer to the first byte of register.
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//! @param data The new value of the register.
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//! @throw InvalidAddress will be thrown if the address is more than $7F (the number of register).
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void write(uint24_t addr, uint8_t data);
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//! @brief Execute current voice transformation
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void update();
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//! @brief Return the number of samples written
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int32_t getSamplesCount() const;
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};
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}
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#endif //COMSQUARE_DSP_HPP
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