// // sysexfileloader.cpp // // MiniDexed - Dexed FM synthesizer for bare metal Raspberry Pi // Copyright (C) 2022 The MiniDexed Team // // 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, see . // #include "sysexfileloader.h" #include #include #include #include #include #include #include #include "voices.c" LOGMODULE ("syxfile"); /* uint8_t CSysExFileLoader::s_DefaultVoice[SizeSingleVoice] = // FM-Piano { 95, 29, 20, 50, 99, 95, 00, 00, 41, 00, 19, 00, 00, 03, 00, 06, 79, 00, 01, 00, 14, // OP6 eg_rate_1-4, level_1-4, kbd_lev_scl_brk_pt, kbd_lev_scl_lft_depth, kbd_lev_scl_rht_depth, kbd_lev_scl_lft_curve, kbd_lev_scl_rht_curve, kbd_rate_scaling, amp_mod_sensitivity, key_vel_sensitivity, operator_output_level, osc_mode, osc_freq_coarse, osc_freq_fine, osc_detune 95, 20, 20, 50, 99, 95, 00, 00, 00, 00, 00, 00, 00, 03, 00, 00, 99, 00, 01, 00, 00, // OP5 95, 29, 20, 50, 99, 95, 00, 00, 00, 00, 00, 00, 00, 03, 00, 06, 89, 00, 01, 00, 07, // OP4 95, 20, 20, 50, 99, 95, 00, 00, 00, 00, 00, 00, 00, 03, 00, 02, 99, 00, 01, 00, 07, // OP3 95, 50, 35, 78, 99, 75, 00, 00, 00, 00, 00, 00, 00, 03, 00, 07, 58, 00, 14, 00, 07, // OP2 96, 25, 25, 67, 99, 75, 00, 00, 00, 00, 00, 00, 00, 03, 00, 02, 99, 00, 01, 00, 10, // OP1 94, 67, 95, 60, 50, 50, 50, 50, // 4 * pitch EG rates, 4 * pitch EG level 04, 06, 00, // algorithm, feedback, osc sync 34, 33, 00, 00, 00, 04, // lfo speed, lfo delay, lfo pitch_mod_depth, lfo_amp_mod_depth, lfo_sync, lfo_waveform 03, 24, // pitch_mod_sensitivity, transpose 70, 77, 45, 80, 73, 65, 78, 79, 00, 00 // 10 * char for name ("DEFAULT ") }; */ uint8_t CSysExFileLoader::s_DefaultVoice[SizeSingleVoice] = // INIT VOICE { 99, 99, 99, 99, 99, 99, 99, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 01, 00, 07, // OP6 eg_rate_1-4, level_1-4, kbd_lev_scl_brk_pt, kbd_lev_scl_lft_depth, kbd_lev_scl_rht_depth, kbd_lev_scl_lft_curve, kbd_lev_scl_rht_curve, kbd_rate_scaling, amp_mod_sensitivity, key_vel_sensitivity, operator_output_level, osc_mode, osc_freq_coarse, osc_freq_fine, osc_detune 99, 99, 99, 99, 99, 99, 99, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 01, 00, 07, // OP5 99, 99, 99, 99, 99, 99, 99, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 01, 00, 07, // OP4 99, 99, 99, 99, 99, 99, 99, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 01, 00, 07, // OP3 99, 99, 99, 99, 99, 99, 99, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 01, 00, 07, // OP2 99, 99, 99, 99, 99, 99, 99, 00, 00, 00, 00, 00, 00, 00, 00, 00, 99, 00, 01, 00, 07, // OP1 99, 99, 99, 99, 50, 50, 50, 50, // 4 * pitch EG rates, 4 * pitch EG level 00, 00, 01, // algorithm, feedback, osc sync 35, 00, 00, 00, 01, 00, // lfo speed, lfo delay, lfo pitch_mod_depth, lfo_amp_mod_depth, lfo_sync, lfo_waveform 03, 24, // pitch_mod_sensitivity, transpose 73, 78, 73, 84, 32, 86, 79, 73, 67, 69 // 10 * char for name }; CSysExFileLoader::CSysExFileLoader (const char *pDirName) : m_DirName (pDirName) { m_DirName += "/voice"; m_nNumLoadedBanks = 0; for (unsigned i = 0; i <= MaxVoiceBankID; i++) { m_pVoiceBank[i] = nullptr; } } CSysExFileLoader::~CSysExFileLoader (void) { for (unsigned i = 0; i <= MaxVoiceBankID; i++) { delete m_pVoiceBank[i]; } } void CSysExFileLoader::Load (void) { m_nNumLoadedBanks = 0; DIR *pDirectory = opendir (m_DirName.c_str ()); if (!pDirectory) { LOGWARN ("Directory %s not found", m_DirName.c_str ()); return; } dirent *pEntry; while ((pEntry = readdir (pDirectory)) != nullptr) { unsigned nBank; size_t nLen = strlen (pEntry->d_name); if ( nLen < 5 // "[NNNN]N[_name].syx" || strcasecmp (&pEntry->d_name[nLen-4], ".syx") != 0 || sscanf (pEntry->d_name, "%u", &nBank) != 1) { LOGWARN ("%s: Invalid filename format", pEntry->d_name); continue; } if (nBank > MaxVoiceBankID) { LOGWARN ("Bank #%u is not supported", nBank); continue; } if (m_pVoiceBank[nBank]) { LOGWARN ("Bank #%u already loaded", nBank); continue; } m_pVoiceBank[nBank] = new TVoiceBank; assert (m_pVoiceBank[nBank]); std::string Filename (m_DirName); Filename += "/"; Filename += pEntry->d_name; FILE *pFile = fopen (Filename.c_str (), "rb"); if (pFile) { if ( fread (m_pVoiceBank[nBank], sizeof (TVoiceBank), 1, pFile) == 1 && m_pVoiceBank[nBank]->StatusStart == 0xF0 && m_pVoiceBank[nBank]->CompanyID == 0x43 && m_pVoiceBank[nBank]->Format == 0x09 && m_pVoiceBank[nBank]->StatusEnd == 0xF7) { LOGDBG ("Bank #%u successfully loaded", nBank); m_BankFileName[nBank] = pEntry->d_name; m_nNumLoadedBanks++; } else { LOGWARN ("%s: Invalid size or format", Filename.c_str ()); delete m_pVoiceBank[nBank]; m_pVoiceBank[nBank] = nullptr; } fclose (pFile); } else { delete m_pVoiceBank[nBank]; m_pVoiceBank[nBank] = nullptr; } } closedir (pDirectory); } std::string CSysExFileLoader::GetBankName (unsigned nBankID) { if (nBankID <= MaxVoiceBankID) { std::string Result = m_BankFileName[nBankID]; size_t nLen = Result.length (); if (nLen > 4) { Result.resize (nLen-4); // remove file extension unsigned nBank; char BankName[30+1]; if (sscanf (Result.c_str (), "%u_%30s", &nBank, BankName) == 2) { Result = BankName; return Result; } } } return "NO NAME"; } unsigned CSysExFileLoader::GetNumLoadedBanks (void) { return m_nNumLoadedBanks; } void CSysExFileLoader::GetVoice (unsigned nBankID, unsigned nVoiceID, uint8_t *pVoiceData) { if ( nBankID <= MaxVoiceBankID && nVoiceID <= VoicesPerBank) { if (m_pVoiceBank[nBankID]) { DecodePackedVoice (m_pVoiceBank[nBankID]->Voice[nVoiceID], pVoiceData); return; } else { // Use default voices_bank instead of s_DefaultVoice for bank 0, // if the bank was not successfully loaded from disk. if (nBankID == 0) { memcpy (pVoiceData, voices_bank[0][nVoiceID], SizeSingleVoice); return; } } } memcpy (pVoiceData, s_DefaultVoice, SizeSingleVoice); } // See: https://github.com/bwhitman/learnfm/blob/master/dx7db.py void CSysExFileLoader::DecodePackedVoice (const uint8_t *pPackedData, uint8_t *pDecodedData) { const uint8_t *p = pPackedData; uint8_t *o = pDecodedData; memset (o, 0, 156); for (unsigned op = 0; op < 6; op++) { memcpy(&o[op*21], &p[op*17], 11); uint8_t leftrightcurves = p[op*17+11]; o[op * 21 + 11] = leftrightcurves & 3; o[op * 21 + 12] = (leftrightcurves >> 2) & 3; uint8_t detune_rs = p[op * 17 + 12]; o[op * 21 + 13] = detune_rs & 7; o[op * 21 + 20] = detune_rs >> 3; uint8_t kvs_ams = p[op * 17 + 13]; o[op * 21 + 14] = kvs_ams & 3; o[op * 21 + 15] = kvs_ams >> 2; o[op * 21 + 16] = p[op * 17 + 14]; uint8_t fcoarse_mode = p[op * 17 + 15]; o[op * 21 + 17] = fcoarse_mode & 1; o[op * 21 + 18] = fcoarse_mode >> 1; o[op * 21 + 19] = p[op * 17 + 16]; } memcpy (&o[126], &p[102], 9); uint8_t oks_fb = p[111]; o[135] = oks_fb & 7; o[136] = oks_fb >> 3; memcpy (&o[137], &p[112], 4); uint8_t lpms_lfw_lks = p[116]; o[141] = lpms_lfw_lks & 1; o[142] = (lpms_lfw_lks >> 1) & 7; o[143] = lpms_lfw_lks >> 4; memcpy (&o[144], &p[117], 11); o[155] = 0x3f; // Clamp the unpacked patches to a known max. static uint8_t maxes[] = { 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, // osc6 3, 3, 7, 3, 7, 99, 1, 31, 99, 14, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, // osc5 3, 3, 7, 3, 7, 99, 1, 31, 99, 14, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, // osc4 3, 3, 7, 3, 7, 99, 1, 31, 99, 14, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, // osc3 3, 3, 7, 3, 7, 99, 1, 31, 99, 14, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, // osc2 3, 3, 7, 3, 7, 99, 1, 31, 99, 14, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, // osc1 3, 3, 7, 3, 7, 99, 1, 31, 99, 14, 99, 99, 99, 99, 99, 99, 99, 99, // pitch eg rate & level 31, 7, 1, 99, 99, 99, 99, 1, 5, 7, 48, // algorithm etc 126, 126, 126, 126, 126, 126, 126, 126, 126, 126, // name 127 // operator on/off }; for (unsigned i = 0; i < 156; i++) { if (o[i] > maxes[i]) { o[i] = maxes[i]; } } }