/* MicroDexed MicroDexed is a port of the Dexed sound engine (https://github.com/asb2m10/dexed) for the Teensy-3.5/3.6 with audio shield. Dexed ist heavily based on https://github.com/google/music-synthesizer-for-android (c)2018-2020 H. Wirtz This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "config.h" #include "synth.h" #include "dexed.h" #include "EngineMkI.h" #include "EngineOpl.h" #include "fm_core.h" #include "exp2.h" #include "sin.h" #include "freqlut.h" #include "controllers.h" #include "PluginFx.h" #include #include #include "porta.h" #ifdef USE_TEENSY_DSP #include #endif extern config_t configuration; Dexed::Dexed(int rate) { uint8_t i; Exp2::init(); Tanh::init(); Sin::init(); Freqlut::init(rate); Lfo::init(rate); PitchEnv::init(rate); Env::init_sr(rate); Porta::init_sr(rate); fx.init(rate); engineMkI = new EngineMkI; engineOpl = new EngineOpl; engineMsfa = new FmCore; for (i = 0; i < MAX_ACTIVE_NOTES; i++) { voices[i].dx7_note = new Dx7Note; voices[i].keydown = false; voices[i].sustained = false; voices[i].live = false; } max_notes = MAX_NOTES; currentNote = 0; resetControllers(); controllers.masterTune = 0; controllers.opSwitch = 0x3f; // enable all operators //controllers.opSwitch=0x00; lastKeyDown = -1; lfo.reset(data + 137); setMonoMode(false); sustain = false; setEngineType(DEXED_ENGINE); } Dexed::~Dexed() { currentNote = -1; for (uint8_t note = 0; note < MAX_ACTIVE_NOTES; note++) delete voices[note].dx7_note; delete(engineMsfa); delete(engineOpl); delete(engineMkI); } void Dexed::activate(void) { panic(); controllers.refresh(); } void Dexed::deactivate(void) { panic(); } void Dexed::getSamples(uint16_t n_samples, int16_t* buffer) { uint16_t i; float sumbuf[n_samples]; if (refreshVoice) { for (i = 0; i < max_notes; i++) { if ( voices[i].live ) voices[i].dx7_note->update(data, voices[i].midi_note, voices[i].velocity, voices[i].porta); } lfo.reset(data + 137); refreshVoice = false; } for (i = 0; i < n_samples; i += _N_) { AlignedBuf audiobuf; for (uint8_t j = 0; j < _N_; ++j) { audiobuf.get()[j] = 0; sumbuf[i + j] = 0.0; } int32_t lfovalue = lfo.getsample(); int32_t lfodelay = lfo.getdelay(); for (uint8_t note = 0; note < max_notes; note++) { if (voices[note].live) { voices[note].dx7_note->compute(audiobuf.get(), lfovalue, lfodelay, &controllers); for (uint8_t j = 0; j < _N_; ++j) { int32_t val = audiobuf.get()[j]; val = val >> 4; #ifdef USE_TEENSY_DSP int32_t clip_val = signed_saturate_rshift(val, 24, 9); #else int32_t clip_val = val < -(1 << 24) ? 0x8000 : val >= (1 << 24) ? 0x7fff : val >> 9; #endif float f = static_cast(clip_val >> REDUCE_LOUDNESS) / 0x7fff; #if defined(REDUCE_LOUDNESS_FACTOR) f *= REDUCE_LOUDNESS_FACTOR; #endif if (f > 1.0) { f = 1.0; overload++; } else if (f < -1.0) { f = -1.0; overload++; } sumbuf[i + j] += f; audiobuf.get()[j] = 0; } } } } #ifdef USE_FX fx.process(sumbuf, n_samples); // #else // arm_scale_f32(sumbuf, fx.getGain(), sumbuf, n_samples); #endif //#ifdef USE_TEENSY_DSP arm_float_to_q15(sumbuf, buffer, AUDIO_BLOCK_SAMPLES); //#else //for (i = 0; i < n_samples; ++i) //buffer[i] = static_cast(sumbuf[i] * 0x7fff); //#endif } void Dexed::keydown(int16_t pitch, uint8_t velo) { if ( velo == 0 ) { keyup(pitch); return; } pitch += data[144] - TRANSPOSE_FIX; #if defined(NORMALIZE_DX_VELOCITY) velo = (((float)velo) * 0.7874015 + 0.5); // 100/127 #endif int previousKeyDown = lastKeyDown; lastKeyDown = pitch; int porta = -1; if ( controllers.portamento_enable_cc && previousKeyDown >= 0 ) porta = controllers.portamento_cc; uint8_t note = currentNote; uint8_t keydown_counter = 0; for (uint8_t i = 0; i < max_notes; i++) { if (!voices[note].keydown) { currentNote = (note + 1) % max_notes; voices[note].midi_note = pitch; voices[note].velocity = velo; voices[note].sustained = sustain; voices[note].keydown = true; int srcnote = (previousKeyDown >= 0) ? previousKeyDown : pitch; voices[note].dx7_note->init(data, pitch, velo, srcnote, porta); if ( data[136] ) voices[note].dx7_note->oscSync(); break; } else keydown_counter++; note = (note + 1) % max_notes; } if (keydown_counter == 0) lfo.keydown(); if ( monoMode ) { for (uint8_t i = 0; i < max_notes; i++) { if ( voices[i].live ) { // all keys are up, only transfer signal if ( ! voices[i].keydown ) { voices[i].live = false; voices[note].dx7_note->transferSignal(*voices[i].dx7_note); break; } if ( voices[i].midi_note < pitch ) { voices[i].live = false; voices[note].dx7_note->transferState(*voices[i].dx7_note); break; } return; } } } voices[note].live = true; } void Dexed::keyup(int16_t pitch) { if (pitch < 0) // for disabling the oldest note when cpu overload is detected { voices[currentNote].keydown = false; if (--max_notes == currentNote) currentNote = 0; } else { uint8_t note; pitch += data[144] - TRANSPOSE_FIX; for (note = 0; note < max_notes; note++) { if ( voices[note].midi_note == pitch && voices[note].keydown ) { voices[note].keydown = false; break; } } // note not found ? if ( note >= max_notes ) { return; } if ( monoMode ) { int16_t highNote = -1; uint8_t target = 0; for (int8_t i = 0; i < max_notes; i++) { if ( voices[i].keydown && voices[i].midi_note > highNote ) { target = i; highNote = voices[i].midi_note; } } if ( highNote != -1 && voices[note].live ) { voices[note].live = false; voices[target].live = true; voices[target].dx7_note->transferState(*voices[note].dx7_note); } } if ( sustain ) { voices[note].sustained = true; } else { voices[note].dx7_note->keyup(); } } } void Dexed::doRefreshVoice(void) { refreshVoice = true; } void Dexed::setOPs(uint8_t ops) { controllers.opSwitch = ops; } uint8_t Dexed::getEngineType() { return engineType; } void Dexed::setEngineType(uint8_t tp) { if (engineType == tp) return; switch (tp) { case DEXED_ENGINE_MARKI: controllers.core = engineMkI; break; case DEXED_ENGINE_OPL: controllers.core = engineOpl; break; default: controllers.core = engineMsfa; tp = DEXED_ENGINE_MODERN; break; } engineType = tp; panic(); controllers.refresh(); } bool Dexed::isMonoMode(void) { return monoMode; } void Dexed::setMonoMode(bool mode) { if (monoMode == mode) return; //panic(); notesOff(); monoMode = mode; } void Dexed::setSustain(bool s) { if (sustain == s) return; sustain = s; } bool Dexed::getSustain(void) { return sustain; } void Dexed::panic(void) { AudioNoInterrupts(); for (uint8_t i = 0; i < MAX_ACTIVE_NOTES; i++) { if (voices[i].live == true) { voices[i].keydown = false; voices[i].live = false; voices[i].sustained = false; if ( voices[i].dx7_note != NULL ) { voices[i].dx7_note->oscSync(); } } } AudioInterrupts(); } void Dexed::resetControllers(void) { controllers.values_[kControllerPitch] = 0x2000; controllers.values_[kControllerPitchRange] = 0; controllers.values_[kControllerPitchStep] = 0; controllers.modwheel_cc = 0; controllers.foot_cc = 0; controllers.breath_cc = 0; controllers.aftertouch_cc = 0; controllers.portamento_enable_cc = false; controllers.portamento_cc = 0; controllers.refresh(); } void Dexed::notesOff(void) { for (uint8_t i = 0; i < MAX_ACTIVE_NOTES; i++) { if (voices[i].live == true) { voices[i].keydown = false; voices[i].live = false; } } } void Dexed::setMaxNotes(uint8_t n) { if (n <= MAX_ACTIVE_NOTES) { notesOff(); max_notes = n; panic(); controllers.refresh(); } } uint8_t Dexed::getMaxNotes(void) { return max_notes; } uint8_t Dexed::getNumNotesPlaying(void) { uint8_t op_carrier = controllers.core->get_carrier_operators(data[134]); // look for carriers uint8_t i; uint8_t count_playing_voices = 0; for (i = 0; i < max_notes; i++) { if (voices[i].live == true) { uint8_t op_amp = 0; uint8_t op_carrier_num = 0; memset(&voiceStatus, 0, sizeof(VoiceStatus)); voices[i].dx7_note->peekVoiceStatus(voiceStatus); for (uint8_t op = 0; op < 6; op++) { if ((op_carrier & (1 << op))) { // this voice is a carrier! op_carrier_num++; if (voiceStatus.amp[op] <= VOICE_SILENCE_LEVEL && voiceStatus.ampStep[op] == 4) { // this voice produces no audio output op_amp++; } } } if (op_amp == op_carrier_num) { // all carrier-operators are silent -> disable the voice voices[i].live = false; voices[i].sustained = false; voices[i].keydown = false; #ifdef DEBUG Serial.print(F("Shutdown voice: ")); Serial.println(i, DEC); #endif } else count_playing_voices++; } } return (count_playing_voices); } bool Dexed::loadPackedVoiceParameters(uint8_t* new_data) { uint8_t* p_data = data; uint8_t op; uint8_t tmp; char dexed_voice_name[11]; panic(); for (op = 0; op < 6; op++) { // DEXED_OP_EG_R1, // 0 // DEXED_OP_EG_R2, // 1 // DEXED_OP_EG_R3, // 2 // DEXED_OP_EG_R4, // 3 // DEXED_OP_EG_L1, // 4 // DEXED_OP_EG_L2, // 5 // DEXED_OP_EG_L3, // 6 // DEXED_OP_EG_L4, // 7 // DEXED_OP_LEV_SCL_BRK_PT, // 8 // DEXED_OP_SCL_LEFT_DEPTH, // 9 // DEXED_OP_SCL_RGHT_DEPTH, // 10 memcpy(&data[op * 21], &new_data[op * 17], 11); tmp = new_data[(op * 17) + 11]; *(p_data + DEXED_OP_SCL_LEFT_CURVE + (op * 21)) = (tmp & 0x3); *(p_data + DEXED_OP_SCL_RGHT_CURVE + (op * 21)) = (tmp & 0x0c) >> 2; tmp = new_data[(op * 17) + 12]; *(p_data + DEXED_OP_OSC_DETUNE + (op * 21)) = (tmp & 0x78) >> 3; *(p_data + DEXED_OP_OSC_RATE_SCALE + (op * 21)) = (tmp & 0x07); tmp = new_data[(op * 17) + 13]; *(p_data + DEXED_OP_KEY_VEL_SENS + (op * 21)) = (tmp & 0x1c) >> 2; *(p_data + DEXED_OP_AMP_MOD_SENS + (op * 21)) = (tmp & 0x03); *(p_data + DEXED_OP_OUTPUT_LEV + (op * 21)) = new_data[(op * 17) + 14]; tmp = new_data[(op * 17) + 15]; *(p_data + DEXED_OP_FREQ_COARSE + (op * 21)) = (tmp & 0x3e) >> 1; *(p_data + DEXED_OP_OSC_MODE + (op * 21)) = (tmp & 0x01); *(p_data + DEXED_OP_FREQ_FINE + (op * 21)) = new_data[(op * 17) + 16]; } // DEXED_PITCH_EG_R1, // 0 // DEXED_PITCH_EG_R2, // 1 // DEXED_PITCH_EG_R3, // 2 // DEXED_PITCH_EG_R4, // 3 // DEXED_PITCH_EG_L1, // 4 // DEXED_PITCH_EG_L2, // 5 // DEXED_PITCH_EG_L3, // 6 // DEXED_PITCH_EG_L4, // 7 memcpy(&data[DEXED_VOICE_OFFSET], &new_data[102], 8); tmp = new_data[110]; *(p_data + DEXED_VOICE_OFFSET + DEXED_ALGORITHM) = (tmp & 0x1f); tmp = new_data[111]; *(p_data + DEXED_VOICE_OFFSET + DEXED_OSC_KEY_SYNC) = (tmp & 0x08) >> 3; *(p_data + DEXED_VOICE_OFFSET + DEXED_FEEDBACK) = (tmp & 0x07); // DEXED_LFO_SPEED, // 11 // DEXED_LFO_DELAY, // 12 // DEXED_LFO_PITCH_MOD_DEP, // 13 // DEXED_LFO_AMP_MOD_DEP, // 14 memcpy(&data[DEXED_VOICE_OFFSET + DEXED_LFO_SPEED], &new_data[112], 4); tmp = new_data[116]; *(p_data + DEXED_VOICE_OFFSET + DEXED_LFO_PITCH_MOD_SENS) = (tmp & 0x30) >> 4; *(p_data + DEXED_VOICE_OFFSET + DEXED_LFO_WAVE) = (tmp & 0x0e) >> 1; *(p_data + DEXED_VOICE_OFFSET + DEXED_LFO_SYNC) = (tmp & 0x01); *(p_data + DEXED_VOICE_OFFSET + DEXED_TRANSPOSE) = new_data[117]; memcpy(&data[DEXED_VOICE_OFFSET + DEXED_NAME], &new_data[118], 10); panic(); doRefreshVoice(); //activate(); strncpy(dexed_voice_name, (char *)&new_data[118], sizeof(dexed_voice_name) - 1); dexed_voice_name[10] = '\0'; #ifdef DEBUG Serial.print(F("Voice [")); Serial.print(dexed_voice_name); Serial.println(F("] loaded.")); #endif return (true); } bool Dexed::loadVoiceParameters(uint8_t* new_data) { char dexed_voice_name[11]; panic(); memcpy(&data, new_data, 155); doRefreshVoice(); //activate(); strncpy(dexed_voice_name, (char *)&new_data[145], sizeof(dexed_voice_name) - 1); dexed_voice_name[10] = '\0'; #ifdef DEBUG Serial.print(F("Voice [")); Serial.print(dexed_voice_name); Serial.println(F("] loaded.")); #endif return (true); } /*bool Dexed::loadGlobalParameters(uint8_t* new_data) { uint8_t* p_data = data; controllers.values_[kControllerPitchRange] = new_data[DEXED_GLOBAL_PARAMETER_OFFSET + DEXED_PITCHBEND_RANGE]; controllers.values_[kControllerPitchStep] = new_data[DEXED_GLOBAL_PARAMETER_OFFSET + DEXED_PITCHBEND_STEP]; controllers.wheel.setRange(new_data[DEXED_GLOBAL_PARAMETER_OFFSET + DEXED_MODWHEEL_RANGE]); controllers.wheel.setTarget(new_data[DEXED_GLOBAL_PARAMETER_OFFSET + DEXED_MODWHEEL_ASSIGN]); controllers.foot.setRange(new_data[DEXED_GLOBAL_PARAMETER_OFFSET + DEXED_FOOTCTRL_RANGE]); controllers.foot.setTarget(new_data[DEXED_GLOBAL_PARAMETER_OFFSET + DEXED_FOOTCTRL_ASSIGN]); controllers.breath.setRange(new_data[DEXED_GLOBAL_PARAMETER_OFFSET + DEXED_BREATHCTRL_RANGE]); controllers.breath.setTarget(new_data[DEXED_GLOBAL_PARAMETER_OFFSET + DEXED_BREATHCTRL_ASSIGN]); controllers.at.setRange(new_data[DEXED_GLOBAL_PARAMETER_OFFSET + DEXED_AT_RANGE]); controllers.at.setTarget(new_data[DEXED_GLOBAL_PARAMETER_OFFSET + DEXED_AT_ASSIGN]); controllers.masterTune = (int(new_data[DEXED_GLOBAL_PARAMETER_OFFSET + DEXED_MASTER_TUNE] / 100.0) * 0x4000 << 11) * (1.0 / 12); controllers.refresh(); setOPs((*(p_data + DEXED_GLOBAL_PARAMETER_OFFSET + DEXED_OP1_ENABLE) << 5) | (*(p_data + DEXED_GLOBAL_PARAMETER_OFFSET + DEXED_OP2_ENABLE) << 4) | (*(p_data + DEXED_GLOBAL_PARAMETER_OFFSET + DEXED_OP3_ENABLE) << 3) | (*(p_data + DEXED_GLOBAL_PARAMETER_OFFSET + DEXED_OP4_ENABLE) << 2) | (*(p_data + DEXED_GLOBAL_PARAMETER_OFFSET + DEXED_OP5_ENABLE) << 1) | (p_data + DEXED_GLOBAL_PARAMETER_OFFSET + DEXED_OP6_ENABLE )); setMaxNotes(*(p_data + DEXED_GLOBAL_PARAMETER_OFFSET + DEXED_MAX_NOTES)); setMaxNotes(*(p_data + DEXED_GLOBAL_PARAMETER_OFFSET + DEXED_MAX_NOTES)); //panic(); doRefreshVoice(); //activate(); #ifdef DEBUG Serial.println(F("Global parameters loaded.")); #endif return (true); }*/ /*bool Dexed::initGlobalParameters(void) { uint8_t init_data[18]; #ifdef DEBUG Serial.println(F("Initializing global parameters")); #endif init_data[DEXED_PITCHBEND_RANGE] = 1; init_data[DEXED_PITCHBEND_STEP] = 1; init_data[DEXED_MODWHEEL_RANGE] = 99; init_data[DEXED_MODWHEEL_ASSIGN] = 7; init_data[DEXED_FOOTCTRL_RANGE] = 99; init_data[DEXED_FOOTCTRL_ASSIGN] = 7; init_data[DEXED_BREATHCTRL_RANGE] = 99; init_data[DEXED_BREATHCTRL_ASSIGN] = 7; init_data[DEXED_AT_RANGE] = 99; init_data[DEXED_AT_ASSIGN] = 7; init_data[DEXED_MASTER_TUNE] = 0; init_data[DEXED_OP1_ENABLE] = 1; init_data[DEXED_OP2_ENABLE] = 1; init_data[DEXED_OP3_ENABLE] = 1; init_data[DEXED_OP4_ENABLE] = 1; init_data[DEXED_OP5_ENABLE] = 1; init_data[DEXED_OP6_ENABLE] = 1; init_data[DEXED_MAX_NOTES] = MAX_NOTES; loadGlobalParameters(init_data); return (true); }*/ void Dexed::setPBController(uint8_t pb_range, uint8_t pb_step) { #ifdef DEBUG Serial.println(F("Dexed::setPBController")); #endif pb_range = constrain(pb_range, PB_RANGE_MIN, PB_RANGE_MAX); pb_step = constrain(pb_step, PB_STEP_MIN, PB_STEP_MAX); #ifdef DEBUG Serial.print(F("pb_range=")); Serial.println(pb_range, DEC); Serial.print(F("pb_step=")); Serial.println(pb_step, DEC); #endif controllers.values_[kControllerPitchRange] = pb_range; controllers.values_[kControllerPitchStep] = pb_step; //controllers.refresh(); } void Dexed::setMWController(uint8_t mw_range, uint8_t mw_assign) { #ifdef DEBUG Serial.println(F("Dexed::setMWController")); #endif mw_range = constrain(mw_range, MW_RANGE_MIN, MW_RANGE_MAX); mw_assign = constrain(mw_assign, MW_ASSIGN_MIN, MW_ASSIGN_MAX); #ifdef DEBUG Serial.print(F("mw_range=")); Serial.println(mw_range, DEC); Serial.print(F("mw_assign=")); Serial.println(mw_assign, DEC); #endif controllers.wheel.setRange(mw_range); controllers.wheel.setTarget(mw_assign); controllers.refresh(); } void Dexed::setFCController(uint8_t fc_range, uint8_t fc_assign) { #ifdef DEBUG Serial.println(F("Dexed::setFCController")); #endif fc_range = constrain(fc_range, FC_RANGE_MIN, FC_RANGE_MAX); fc_assign = constrain(fc_assign, FC_ASSIGN_MIN, FC_ASSIGN_MAX); #ifdef DEBUG Serial.print(F("fc_range=")); Serial.println(fc_range, DEC); Serial.print(F("fc_assign=")); Serial.println(fc_assign, DEC); #endif controllers.foot.setRange(fc_range); controllers.foot.setTarget(fc_assign); controllers.refresh(); } void Dexed::setBCController(uint8_t bc_range, uint8_t bc_assign) { #ifdef DEBUG Serial.println(F("Dexed::setBCController")); #endif bc_range = constrain(bc_range, BC_RANGE_MIN, BC_RANGE_MAX); bc_assign = constrain(bc_assign, BC_ASSIGN_MIN, BC_ASSIGN_MAX); #ifdef DEBUG Serial.print(F("bc_range=")); Serial.println(bc_range, DEC); Serial.print(F("bc_assign=")); Serial.println(bc_assign, DEC); #endif controllers.breath.setRange(bc_range); controllers.breath.setTarget(bc_assign); controllers.refresh(); } void Dexed::setATController(uint8_t at_range, uint8_t at_assign) { #ifdef DEBUG Serial.println(F("Dexed::setATController")); #endif at_range = constrain(at_range, AT_RANGE_MIN, AT_RANGE_MAX); at_assign = constrain(at_assign, AT_ASSIGN_MIN, AT_ASSIGN_MAX); #ifdef DEBUG Serial.print(F("at_range=")); Serial.println(at_range, DEC); Serial.print(F("at_assign=")); Serial.println(at_assign, DEC); #endif controllers.at.setRange(at_range); controllers.at.setTarget(at_assign); controllers.refresh(); } void Dexed::setPortamentoMode(uint8_t portamento_mode, uint8_t portamento_glissando, uint8_t portamento_time) { controllers.portamento_cc = portamento_time; if (portamento_time > 0) controllers.portamento_enable_cc = true; else controllers.portamento_enable_cc = false; controllers.refresh(); }