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Cog/ThirdParty/libemusc/include/control_rom.h
Christopher Snowhill e233a95c2a EmuSC experiment goes here 
This is mostly working, but kind of buggy.

Signed-off-by: Christopher Snowhill <kode54@gmail.com>
2025-03-15 00:21:43 -07:00

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/*
* This file is part of libEmuSC, a Sound Canvas emulator library
* Copyright (C) 2022-2024 Håkon Skjelten
*
* libEmuSC is free software: you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* libEmuSC is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with libEmuSC. If not, see <http://www.gnu.org/licenses/>.
*/
// Control ROM decoding is based on the SC55_Soundfont generator written by
// Kitrinx and NewRisingSun [ https://github.com/Kitrinx/SC55_Soundfont ]
#ifndef __CONTROL_ROM_H__
#define __CONTROL_ROM_H__
#include <stdint.h>
#include <array>
#include <fstream>
#include <string>
#include <vector>
namespace EmuSC {
class ControlRom
{
public:
ControlRom(std::string romPath, std::string cpuRomPath);
~ControlRom();
// Internal data structures extracted from the control ROM file
struct Sample { // 16 bytes
uint8_t volume; // Volume attenuation (0x7f - 0)
uint32_t address; // Offset on vsc, bank + scrambled address on SC55.
// Bits above 20 are wave bank.
uint16_t attackEnd; // boundry between attack and decay? Unconfirmed.
uint16_t sampleLen; // Sample Size
uint16_t loopLen; // Loop point, used as sample_len - loop_len - 1
uint8_t loopMode; // 2 if not a looping sound, 1 forward then back,
// 0 forward only.
uint8_t rootKey; // Base pitch of the sample
uint16_t pitch; // Fine pitch adjustment, 2048 to 0. Pos. incr. pitch.
uint16_t fineVolume; // Always 0x400 on VSC, appears to be 1000ths of a
// decibel. Positive is higher volume.
};
struct Partial { // 48 bytes in total
std::string name;
uint8_t breaks[16]; // Note breakpoints corresponding to sample addresses
uint16_t samples[16]; // Set of addresses to the sample table. 0 is default
}; // and above corresponds to breakpoints
struct InstPartial { // 92 bytes in total
uint8_t LFO2Waveform;
uint8_t LFO2Rate; // LFO frequency
uint8_t LFO2Delay; // LFO delay before LFO Fade starts
uint8_t LFO2Fade; // LFO fade in, linear increase
uint16_t partialIndex; // Partial table index, 0xFFFF for unused
int8_t panpot; // [-64, 64]. Default 0x40 (0-127)
int8_t coarsePitch; // Shifts pitch in semitones. Default 0x40
int8_t finePitch; // Shifts pitch in cents. Default 0x40
int8_t randPitch;
int8_t pitchKeyFlw;
uint8_t TVPLFO1Depth;
uint8_t TVPLFO2Depth;
uint8_t pitchEnvDepth;
uint8_t pitchEnvL0; // Pitch Envelope L0
uint8_t pitchEnvL1; // Pitch Envelope L1
uint8_t pitchEnvL2; // Pitch Envelope L2
uint8_t pitchEnvL3; // Pitch Envelope L3 (L4 = 0)
uint8_t pitchEnvL5; // Pitch Envelope L5
uint8_t pitchEnvT1; // Pitch Envelope T1 (Attack1)
uint8_t pitchEnvT2; // Pitch Envelope T2 (Attack2)
uint8_t pitchEnvT3; // Pitch Envelope T3 (Decay1)
uint8_t pitchEnvT4; // Pitch Envelope T4 (Decay2)
uint8_t pitchEnvT5; // Pitch Envelope T5 (Release)
uint8_t pitchETKeyF14; // Pitch Envelope Time Key Follow (T1 - T4)
uint8_t pitchETKeyF5; // Pitch Envelope Time Key Follow (T5)
uint8_t TVFCOFVelCur; // TVF Cutoff Velocity Curve
int8_t TVFBaseFlt;
int8_t TVFResonance;
int8_t TVFType; // TVF Type [ low pass | high pass | disabled ]
uint8_t TVFCFKeyFlw; // TVF Cutoff Frequency Key Follow
uint8_t TVFCFKeyFlwC; // TVF Cutoff Frequency Key Follow Curves
uint8_t TVFLFO1Depth;
uint8_t TVFLFO2Depth;
uint8_t TVFEnvDepth;
uint8_t TVFEnvL1; // TVF Envelope L1 (L0 = 0)
uint8_t TVFEnvL2; // TVF Envelope L2
uint8_t TVFEnvL3; // TVF Envelope L3
uint8_t TVFEnvL4; // TVF Envelope L4
uint8_t TVFEnvL5; // TVF Envelope L5
uint8_t TVFEnvT1; // TVF Envelope T1
uint8_t TVFEnvT2; // TVF Envelope T2
uint8_t TVFEnvT3; // TVF Envelope T3
uint8_t TVFEnvT4; // TVF Envelope T4
uint8_t TVFEnvT5; // TVF Envelope T5
uint8_t TVFETKeyF14; // TVF Envelope Time Key Follow (T1 - T4)
uint8_t TVFETKeyF5; // TVF Envelope Time Key Follow (T5)
uint8_t TVALvlVelCur;
int8_t volume; // Volume attenuation (0x7f - 0)
uint8_t TVABiasPoint; // TVA Bias Point, 0=V shape, 1=key>85, 2=flat curve
uint8_t TVABiasLevel;
uint8_t TVALFO1Depth;
uint8_t TVALFO2Depth;
uint8_t TVAEnvL1; // TVA Envelope L1 (L0 = 0)
uint8_t TVAEnvL2; // TVA Envelope L2
uint8_t TVAEnvL3; // TVA Envelope L3
uint8_t TVAEnvL4; // TVA Envelope L4 (L5 = 0)
uint8_t TVAEnvT1; // TVA Envelope T1 (Attack1)
uint8_t TVAEnvT2; // TVA Envelope T2 (Attack2)
uint8_t TVAEnvT3; // TVA Envelope T3 (Decay1)
uint8_t TVAEnvT4; // TVA Envelope T4 (Decay2)
uint8_t TVAEnvT5; // TVA Envelope T5 (Release)
uint8_t TVAETKeyP14; // TVA Envelope Time Key Presets (T1 - T4)
uint8_t TVAETKeyP5; // TVA Envelope Time Key Presets (T5)
uint8_t TVAETKeyF14; // TVA Envelope Time Key Follow (T1 - T4)
uint8_t TVAETKeyF5; // TVA Envelope Time Key Follow (T5)
uint8_t TVAETVSens14; // TVA Envelope Time Velocity Sensitivity (T1 - T4)
uint8_t TVAETVSens5; // TVA Envelope Time Velocity Sensitivity (T5)
};
struct Instrument { // 204 bytes in total
std::string name;
uint8_t volume; // Volume attenuation (0x7f - 0)
uint8_t LFO1Waveform;
uint8_t LFO1Rate; // LFO frequency
uint8_t LFO1Delay;
uint8_t LFO1Fade;
uint8_t partialsUsed; // Bit 0 & 1 => which of the two partials are in use
uint8_t pitchCurve;
struct InstPartial partials[2];
};
struct DrumSet { // 1164 bytes
uint16_t preset[128];
uint8_t volume[128];
uint8_t key[128];
uint8_t assignGroup[128];// AKA exclusive class
uint8_t panpot[128];
uint8_t reverb[128];
uint8_t chorus[128];
uint8_t flags[128]; // 0x10 -> accept note on, 0x01 -> accept note off
std::string name; // 12 chars
};
struct LookupTables {
// PROGROM
std::array<uint8_t, 128> VelocityCurve0;
std::array<uint8_t, 128> VelocityCurve1;
std::array<uint8_t, 128> VelocityCurve2;
std::array<uint8_t, 128> VelocityCurve3;
std::array<uint8_t, 128> VelocityCurve4;
std::array<uint8_t, 128> VelocityCurve5;
std::array<uint8_t, 128> VelocityCurve6;
std::array<uint8_t, 128> VelocityCurve7;
std::array<uint8_t, 128> VelocityCurve8;
std::array<uint8_t, 128> VelocityCurve9;
std::array<uint8_t, 128> mul2;
std::array<uint8_t, 128> mul2From85;
std::array<uint8_t, 128> TVABiasPoint1;
std::array<uint8_t, 128> TVAEnvTKFP1T14Index;
std::array<uint8_t, 128> TVAEnvTKFP1T5Index;
// std::array<int, 128> mul256;
// std::array<int, 128> mul256From60;
// std::array<int, 128> mul256From96;
// std::array<int, 128> mul256Upto96;
std::array<int, 128> PitchScale1;
std::array<int, 128> PitchScale2;
std::array<int, 128> PitchScale3;
// CPUROM
std::array<uint8_t, 21> TimeKeyFollowDiv;
std::array<int, 256> TimeKeyFollow;
std::array<int, 128> envelopeTime;
std::array<int, 128> LFORate;
std::array<int, 128> LFODelayTime;
std::array<int, 128> LFOTVFDepth;
std::array<int, 128> LFOTVPDepth;
std::array<uint8_t, 128> LFOSine;
std::array<int, 128> TVFEnvDepth;
std::array<int, 128> TVFCutoffFreq;
std::array<uint8_t, 256> TVFResonanceFreq;
std::array<uint8_t, 128> TVFResonance;
std::array<int, 128> PitchEnvDepth;
std::array<uint8_t, 64> TVFEnvScale;
std::array<int, 256> TVAEnvExpChange;
std::array<uint8_t, 129> TVABiasLevel;
std::array<uint8_t, 128> TVAPanpot;
std::array<uint8_t, 128> TVALevelIndex;
std::array<uint8_t, 256> TVALevel;
};
struct LookupTables lookupTables;
enum class SynthGen {
SC55 = 0,
SC55mk2 = 1,
SC88 = 2,
SC88Pro = 3
};
int dump_demo_songs(std::string path);
bool intro_anim_available(void);
std::vector<uint8_t> get_intro_anim(int animIndex = 0);
std::string model(void) { return _model; }
std::string version(void) { return _version; }
std::string date(void) { return _date; }
enum SynthGen generation(void) { return _synthGeneration; }
const std::array<uint8_t, 128>& get_drum_sets_LUT(void) { return _drumSetsLUT; }
const uint8_t max_polyphony(void);
std::vector<std::vector<std::string>> get_instruments_list(void);
std::vector<std::vector<std::string>> get_partials_list(void);
std::vector<std::vector<std::string>> get_samples_list(void);
std::vector<std::vector<std::string>> get_variations_list(void);
std::vector<std::string> get_drum_sets_list(void);
inline struct Instrument& instrument(int i) { return _instruments[i]; }
inline struct Partial& partial(int p) { return _partials[p]; }
inline struct Sample& sample(int s) { return _samples[s]; }
inline struct DrumSet& drumSet(int ds) { return _drumSets[ds]; }
inline const std::array<uint16_t, 128>& variation(int v) const { return _variations[v]; }
inline int numSampleSets(void) { return _samples.size(); }
inline int numInstruments(void) { return _instruments.size(); }
inline std::vector<DrumSet> &get_drumsets_ref(void) { return _drumSets; }
private:
std::string _romPath;
std::string _model;
std::string _version;
std::string _date;
enum SynthModel {
sm_SC55, // Original Sound Canvas
sm_SC55mkII, // Upgraded model
sm_SCC1, // ISA card version
sm_SC88,
sm_SC88Pro,
};
enum SynthModel _synthModel;
enum SynthGen _synthGeneration;
static constexpr uint8_t _maxPolyphonySC55 = 24;
static constexpr uint8_t _maxPolyphonySC55mkII = 28;
static constexpr uint8_t _maxPolyphonySC88 = 64;
static const std::vector<uint32_t> _banksSC55;
// Only a placeholder, SC-88 layout is currently unkown
static const std::vector<uint32_t> _banksSC88;
struct _ProgMemoryMapLUT {
int VelocityCurve0;
int VelocityCurve1;
int VelocityCurve2;
int VelocityCurve3;
int VelocityCurve4;
int VelocityCurve5;
int VelocityCurve6;
int VelocityCurve7;
int VelocityCurve8;
int VelocityCurve9;
int mul2;
int mul2From85;
int TVABiasPoint1;
int TVAEnvTKFP1T14Index;
int TVAEnvTKFP1T5Index;
// int mul256;
// int mul256From60;
// int mul256From96;
// int mul256Upto96;
int PitchScale1;
int PitchScale2;
int PitchScale3;
};
const _ProgMemoryMapLUT SC55_1_21_Prog_LUT {
0x3d1e8, 0x3d268, 0x3d2e8, 0x3d368, 0x3d3e8, 0x3d468, 0x3d4e8, 0x3d568,
0x3d5e8, 0x3d668, 0x3dd82, 0x3de02, 0x3de02, 0x3df82, 0x3e102, 0x3e982,
0x3ea82, 0x3eb82 };
const _ProgMemoryMapLUT SC55mkII_1_01_Prog_LUT {
0x3d1e8, 0x3d268, 0x3d2e8, 0x3d368, 0x3d3e8, 0x3d468, 0x3d4e8, 0x3d568,
0x3d5e8, 0x3d668, 0x3de8c, 0x3df0c, 0x3df0c, 0x3e10c, 0x3e30c, 0x3ee0c,
0x3ef0c, 0x3f00c };
struct _CPUMemoryMapLUT {
int TimeKeyFollowDiv;
int TimeKeyFollow;
int EnvelopeTime;
int LFORate;
int LFODelayTime;
int LFOTVFDepth;
int LFOTVPDepth;
int LFOSine;
int TVFEnvDepth;
int TVFCutoffFreq;
int TVFResonanceFreq;
int TVFResonance;
int PitchEnvDepth;
int TVFEnvScale;
int TVAEnvExpChange;
int TVABiasLevel;
int TVAPanpot;
int TVALevelIndex;
int TVALevel;
};
const _CPUMemoryMapLUT SC55_1_21_CPU_LUT {
0x679a, 0x67c6, 0x6f12, 0x7012, 0x7112, 0x7212, 0x7312, 0x7412,
0x7512, 0x7612, 0x7715, 0x7816, 0x78f2, 0x79f2, 0x6d10, 0x69c6,
0x6c8f, 0x6b0f, 0x6b8f };
const _CPUMemoryMapLUT SC55mkII_1_01_CPU_LUT {
0x650e, 0x653a, 0x6c86, 0x6486, 0x6e86, 0x6f86, 0x7086, 0x7186,
0x7286, 0x7386, 0x7489, 0x758a, 0x7765, 0x7766, 0x6a84, 0x673a,
0x6a03, 0x6883, 0x6903 };
int _read_lookup_tables_progrom(std::ifstream &romFile);
int _read_lookup_tables_cpurom(std::ifstream &romFile);
int _read_lut_16bit(std::ifstream &ifs, int pos, std::array<int, 128> &lut);
int _read_lut_16bit(std::ifstream &ifs, int pos, std::array<int, 129> &lut);
int _read_lut_16bit(std::ifstream &ifs, int pos, std::array<int, 256> &lut);
int _identify_model(std::ifstream &romFile);
const std::vector<uint32_t> &_banks(void);
// To be replaced with std::endian::native from C++20
inline bool _le_native(void) { uint16_t n = 1; return (*(uint8_t *) & n); }
uint16_t _native_endian_uint16(uint8_t *ptr);
uint32_t _native_endian_3bytes_uint32(uint8_t *ptr);
uint32_t _native_endian_4bytes_uint32(uint8_t *ptr);
int _read_instruments(std::ifstream &romFile);
int _read_partials(std::ifstream &romFile);
int _read_variations(std::ifstream &romFile);
int _read_samples(std::ifstream &romFile);
int _read_drum_sets(std::ifstream &romFile);
std::array<uint8_t, 128> _drumSetsLUT;
std::vector<Instrument> _instruments;
std::vector<Partial> _partials;
std::vector<Sample> _samples;
std::vector<DrumSet> _drumSets;
// TODO: define constants for variation table dimensions
std::array<std::array<uint16_t, 128>, 128> _variations;
ControlRom();
};
}
#endif // __CONTROL_ROM_H__
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