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360 lines
10 KiB
360 lines
10 KiB
//
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// sysexfileloader.cpp
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//
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// MiniDexed - Dexed FM synthesizer for bare metal Raspberry Pi
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// Copyright (C) 2022 The MiniDexed Team
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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//
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#include "sysexfileloader.h"
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#include <stdio.h>
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#include <dirent.h>
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#include <stdlib.h>
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#include <string.h>
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#include <strings.h>
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#include <assert.h>
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#include <circle/logger.h>
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#include "voices.c"
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LOGMODULE ("syxfile");
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/*
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uint8_t CSysExFileLoader::s_DefaultVoice[SizeSingleVoice] = // FM-Piano
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{
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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
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95, 20, 20, 50, 99, 95, 00, 00, 00, 00, 00, 00, 00, 03, 00, 00, 99, 00, 01, 00, 00, // OP5
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95, 29, 20, 50, 99, 95, 00, 00, 00, 00, 00, 00, 00, 03, 00, 06, 89, 00, 01, 00, 07, // OP4
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95, 20, 20, 50, 99, 95, 00, 00, 00, 00, 00, 00, 00, 03, 00, 02, 99, 00, 01, 00, 07, // OP3
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95, 50, 35, 78, 99, 75, 00, 00, 00, 00, 00, 00, 00, 03, 00, 07, 58, 00, 14, 00, 07, // OP2
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96, 25, 25, 67, 99, 75, 00, 00, 00, 00, 00, 00, 00, 03, 00, 02, 99, 00, 01, 00, 10, // OP1
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94, 67, 95, 60, 50, 50, 50, 50, // 4 * pitch EG rates, 4 * pitch EG level
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04, 06, 00, // algorithm, feedback, osc sync
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34, 33, 00, 00, 00, 04, // lfo speed, lfo delay, lfo pitch_mod_depth, lfo_amp_mod_depth, lfo_sync, lfo_waveform
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03, 24, // pitch_mod_sensitivity, transpose
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70, 77, 45, 80, 73, 65, 78, 79, 00, 00 // 10 * char for name ("DEFAULT ")
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};
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*/
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uint8_t CSysExFileLoader::s_DefaultVoice[SizeSingleVoice] = // INIT VOICE
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{
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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
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99, 99, 99, 99, 99, 99, 99, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 01, 00, 07, // OP5
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99, 99, 99, 99, 99, 99, 99, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 01, 00, 07, // OP4
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99, 99, 99, 99, 99, 99, 99, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 01, 00, 07, // OP3
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99, 99, 99, 99, 99, 99, 99, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 01, 00, 07, // OP2
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99, 99, 99, 99, 99, 99, 99, 00, 00, 00, 00, 00, 00, 00, 00, 00, 99, 00, 01, 00, 07, // OP1
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99, 99, 99, 99, 50, 50, 50, 50, // 4 * pitch EG rates, 4 * pitch EG level
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00, 00, 01, // algorithm, feedback, osc sync
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35, 00, 00, 00, 01, 00, // lfo speed, lfo delay, lfo pitch_mod_depth, lfo_amp_mod_depth, lfo_sync, lfo_waveform
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03, 24, // pitch_mod_sensitivity, transpose
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73, 78, 73, 84, 32, 86, 79, 73, 67, 69 // 10 * char for name
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};
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CSysExFileLoader::CSysExFileLoader (const char *pDirName)
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: m_DirName (pDirName)
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{
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m_DirName += "/voice";
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m_nNumHighestBank = 0;
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for (unsigned i = 0; i <= MaxVoiceBankID; i++)
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{
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m_pVoiceBank[i] = nullptr;
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}
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}
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CSysExFileLoader::~CSysExFileLoader (void)
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{
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for (unsigned i = 0; i <= MaxVoiceBankID; i++)
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{
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delete m_pVoiceBank[i];
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}
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}
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void CSysExFileLoader::Load (void)
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{
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m_nNumHighestBank = 0;
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DIR *pDirectory = opendir (m_DirName.c_str ());
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if (!pDirectory)
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{
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LOGWARN ("Directory %s not found", m_DirName.c_str ());
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return;
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}
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dirent *pEntry;
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while ((pEntry = readdir (pDirectory)) != nullptr)
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{
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unsigned nBank;
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size_t nLen = strlen (pEntry->d_name);
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if ( nLen < 5 // "[NNNN]N[_name].syx"
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|| strcasecmp (&pEntry->d_name[nLen-4], ".syx") != 0
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|| sscanf (pEntry->d_name, "%u", &nBank) != 1)
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{
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LOGWARN ("%s: Invalid filename format", pEntry->d_name);
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continue;
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}
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if (nBank > MaxVoiceBankID)
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{
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LOGWARN ("Bank #%u is not supported", nBank);
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continue;
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}
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if (m_pVoiceBank[nBank])
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{
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LOGWARN ("Bank #%u already loaded", nBank);
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continue;
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}
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m_pVoiceBank[nBank] = new TVoiceBank;
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assert (m_pVoiceBank[nBank]);
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std::string Filename (m_DirName);
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Filename += "/";
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Filename += pEntry->d_name;
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FILE *pFile = fopen (Filename.c_str (), "rb");
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if (pFile)
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{
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if ( fread (m_pVoiceBank[nBank], sizeof (TVoiceBank), 1, pFile) == 1
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&& m_pVoiceBank[nBank]->StatusStart == 0xF0
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&& m_pVoiceBank[nBank]->CompanyID == 0x43
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&& m_pVoiceBank[nBank]->Format == 0x09
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&& m_pVoiceBank[nBank]->StatusEnd == 0xF7)
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{
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LOGDBG ("Bank #%u successfully loaded", nBank);
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m_BankFileName[nBank] = pEntry->d_name;
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if (nBank > m_nNumHighestBank)
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{
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// This is the bank ID of the highest loaded bank
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m_nNumHighestBank = nBank;
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}
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}
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else
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{
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LOGWARN ("%s: Invalid size or format", Filename.c_str ());
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delete m_pVoiceBank[nBank];
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m_pVoiceBank[nBank] = nullptr;
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}
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fclose (pFile);
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}
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else
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{
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delete m_pVoiceBank[nBank];
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m_pVoiceBank[nBank] = nullptr;
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}
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}
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closedir (pDirectory);
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}
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std::string CSysExFileLoader::GetBankName (unsigned nBankID)
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{
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if (nBankID <= MaxVoiceBankID)
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{
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std::string Result = m_BankFileName[nBankID];
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size_t nLen = Result.length ();
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if (nLen > 4)
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{
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Result.resize (nLen-4); // remove file extension
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unsigned nBank;
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char BankName[30+1];
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if (sscanf (Result.c_str (), "%u_%30s", &nBank, BankName) == 2)
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{
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Result = BankName;
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return Result;
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}
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}
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}
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return "NO NAME";
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}
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unsigned CSysExFileLoader::GetNextBankUp (unsigned nBankID)
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{
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// Find the next loaded bank "up" from the provided bank ID
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for (unsigned id=nBankID+1; id <= m_nNumHighestBank; id++)
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{
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if (IsValidBank(id))
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{
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return id;
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}
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}
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// Handle wrap-around
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for (unsigned id=0; id<nBankID; id++)
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{
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if (IsValidBank(id))
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{
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return id;
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}
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}
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// If we get here there are no other banks!
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return nBankID;
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}
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unsigned CSysExFileLoader::GetNextBankDown (unsigned nBankID)
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{
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// Find the next loaded bank "down" from the provided bank ID
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for (int id=((int)nBankID)-1; id >= 0; id--)
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{
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if (IsValidBank((unsigned)id))
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{
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return id;
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}
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}
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// Handle wrap-around
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for (unsigned id=m_nNumHighestBank; id>nBankID; id--)
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{
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if (IsValidBank(id))
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{
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return id;
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}
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}
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// If we get here there are no other banks!
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return nBankID;
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}
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bool CSysExFileLoader::IsValidBank (unsigned nBankID)
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{
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if (m_pVoiceBank[nBankID])
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{
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// Use a valid "status start/end" as an indicator of a valid loaded bank
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if ((m_pVoiceBank[nBankID]->StatusStart == 0xF0) &&
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(m_pVoiceBank[nBankID]->StatusEnd == 0xF7))
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{
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return true;
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}
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}
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return false;
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}
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unsigned CSysExFileLoader::GetNumHighestBank (void)
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{
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return m_nNumHighestBank;
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}
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void CSysExFileLoader::GetVoice (unsigned nBankID, unsigned nVoiceID, uint8_t *pVoiceData)
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{
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if ( nBankID <= MaxVoiceBankID
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&& nVoiceID <= VoicesPerBank)
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{
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if (IsValidBank(nBankID))
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{
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DecodePackedVoice (m_pVoiceBank[nBankID]->Voice[nVoiceID], pVoiceData);
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return;
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}
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else
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{
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// Use default voices_bank instead of s_DefaultVoice for bank 0,
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// if the bank was not successfully loaded from disk.
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if (nBankID == 0)
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{
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memcpy (pVoiceData, voices_bank[0][nVoiceID], SizeSingleVoice);
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return;
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}
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}
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}
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memcpy (pVoiceData, s_DefaultVoice, SizeSingleVoice);
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}
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// See: https://github.com/bwhitman/learnfm/blob/master/dx7db.py
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void CSysExFileLoader::DecodePackedVoice (const uint8_t *pPackedData, uint8_t *pDecodedData)
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{
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const uint8_t *p = pPackedData;
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uint8_t *o = pDecodedData;
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memset (o, 0, 156);
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for (unsigned op = 0; op < 6; op++)
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{
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memcpy(&o[op*21], &p[op*17], 11);
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uint8_t leftrightcurves = p[op*17+11];
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o[op * 21 + 11] = leftrightcurves & 3;
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o[op * 21 + 12] = (leftrightcurves >> 2) & 3;
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uint8_t detune_rs = p[op * 17 + 12];
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o[op * 21 + 13] = detune_rs & 7;
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o[op * 21 + 20] = detune_rs >> 3;
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uint8_t kvs_ams = p[op * 17 + 13];
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o[op * 21 + 14] = kvs_ams & 3;
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o[op * 21 + 15] = kvs_ams >> 2;
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o[op * 21 + 16] = p[op * 17 + 14];
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uint8_t fcoarse_mode = p[op * 17 + 15];
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o[op * 21 + 17] = fcoarse_mode & 1;
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o[op * 21 + 18] = fcoarse_mode >> 1;
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o[op * 21 + 19] = p[op * 17 + 16];
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}
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memcpy (&o[126], &p[102], 9);
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uint8_t oks_fb = p[111];
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o[135] = oks_fb & 7;
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o[136] = oks_fb >> 3;
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memcpy (&o[137], &p[112], 4);
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uint8_t lpms_lfw_lks = p[116];
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o[141] = lpms_lfw_lks & 1;
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o[142] = (lpms_lfw_lks >> 1) & 7;
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o[143] = lpms_lfw_lks >> 4;
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memcpy (&o[144], &p[117], 11);
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o[155] = 0x3f;
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// Clamp the unpacked patches to a known max.
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static uint8_t maxes[] =
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{
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99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, // osc6
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3, 3, 7, 3, 7, 99, 1, 31, 99, 14,
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99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, // osc5
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3, 3, 7, 3, 7, 99, 1, 31, 99, 14,
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99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, // osc4
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3, 3, 7, 3, 7, 99, 1, 31, 99, 14,
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99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, // osc3
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3, 3, 7, 3, 7, 99, 1, 31, 99, 14,
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99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, // osc2
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3, 3, 7, 3, 7, 99, 1, 31, 99, 14,
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99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, // osc1
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3, 3, 7, 3, 7, 99, 1, 31, 99, 14,
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99, 99, 99, 99, 99, 99, 99, 99, // pitch eg rate & level
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31, 7, 1, 99, 99, 99, 99, 1, 5, 7, 48, // algorithm etc
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126, 126, 126, 126, 126, 126, 126, 126, 126, 126, // name
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127 // operator on/off
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};
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for (unsigned i = 0; i < 156; i++)
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{
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if (o[i] > maxes[i])
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{
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o[i] = maxes[i];
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}
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}
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}
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