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Diffstat (limited to 'src/adlmidi_load.cpp')
| -rw-r--r-- | src/adlmidi_load.cpp | 434 |
1 files changed, 434 insertions, 0 deletions
diff --git a/src/adlmidi_load.cpp b/src/adlmidi_load.cpp new file mode 100644 index 0000000..af7cf0d --- /dev/null +++ b/src/adlmidi_load.cpp @@ -0,0 +1,434 @@ +/* + * libADLMIDI is a free MIDI to WAV conversion library with OPL3 emulation + * + * Original ADLMIDI code: Copyright (c) 2010-2014 Joel Yliluoma <bisqwit@iki.fi> + * ADLMIDI Library API: Copyright (c) 2017 Vitaly Novichkov <admin@wohlnet.ru> + * + * Library is based on the ADLMIDI, a MIDI player for Linux and Windows with OPL3 emulation: + * http://iki.fi/bisqwit/source/adlmidi.html + * + * 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 + * 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 <http://www.gnu.org/licenses/>. + */ + +#include "adlmidi_private.hpp" + + +uint64_t MIDIplay::ReadBEint(const void *buffer, size_t nbytes) +{ + uint64_t result = 0; + const unsigned char *data = reinterpret_cast<const unsigned char *>(buffer); + + for(unsigned n = 0; n < nbytes; ++n) + result = (result << 8) + data[n]; + + return result; +} + +uint64_t MIDIplay::ReadLEint(const void *buffer, size_t nbytes) +{ + uint64_t result = 0; + const unsigned char *data = reinterpret_cast<const unsigned char *>(buffer); + + for(unsigned n = 0; n < nbytes; ++n) + result = result + static_cast<uint64_t>(data[n] << (n * 8)); + + return result; +} + +uint64_t MIDIplay::ReadVarLenEx(size_t tk, bool &ok) +{ + uint64_t result = 0; + ok = false; + + for(;;) + { + if(tk >= TrackData.size()) + return 1; + + if(tk >= CurrentPosition.track.size()) + return 2; + + size_t ptr = CurrentPosition.track[tk].ptr; + + if(ptr >= TrackData[tk].size()) + return 3; + + unsigned char byte = TrackData[tk][CurrentPosition.track[tk].ptr++]; + result = (result << 7) + (byte & 0x7F); + + if(!(byte & 0x80)) break; + } + + ok = true; + return result; +} + +bool MIDIplay::LoadMIDI(const std::string &filename) +{ + fileReader file; + file.openFile(filename.c_str()); + + if(!LoadMIDI(file)) + { + std::perror(filename.c_str()); + return false; + } + + return true; +} + +bool MIDIplay::LoadMIDI(void *data, unsigned long size) +{ + fileReader file; + file.openData(data, size); + return LoadMIDI(file); +} + +bool MIDIplay::LoadMIDI(MIDIplay::fileReader &fr) +{ +#define qqq(x) (void)x + size_t fsize; + qqq(fsize); + + //std::FILE* fr = std::fopen(filename.c_str(), "rb"); + if(!fr.isValid()) + { + ADLMIDI_ErrorString = "Invalid data stream!"; + return false; + } + + const size_t HeaderSize = 4 + 4 + 2 + 2 + 2; // 14 + char HeaderBuf[HeaderSize] = ""; +riffskip: + ; + fsize = fr.read(HeaderBuf, 1, HeaderSize); + + if(std::memcmp(HeaderBuf, "RIFF", 4) == 0) + { + fr.seek(6l, SEEK_CUR); + goto riffskip; + } + + size_t DeltaTicks = 192, TrackCount = 1; + config->stored_samples = 0; + config->backup_samples_size = 0; + opl.AdlPercussionMode = config->AdlPercussionMode; + opl.HighTremoloMode = config->HighTremoloMode; + opl.HighVibratoMode = config->HighVibratoMode; + opl.ScaleModulators = config->ScaleModulators; + opl.LogarithmicVolumes = config->LogarithmicVolumes; + opl.ChangeVolumeRangesModel(static_cast<ADLMIDI_VolumeModels>(config->VolumeModel)); + + if(config->VolumeModel == ADLMIDI_VolumeModel_AUTO) + { + switch(config->AdlBank) + { + default: + opl.m_volumeScale = OPL3::VOLUME_Generic; + break; + + case 14://Doom 2 + case 15://Heretic + case 16://Doom 1 + case 64://Raptor + opl.m_volumeScale = OPL3::VOLUME_DMX; + break; + + case 58://FatMan bank hardcoded in the Windows 9x drivers + case 65://Modded Wohlstand's Fatman bank + case 66://O'Connel's bank + opl.m_volumeScale = OPL3::VOLUME_9X; + break; + + case 62://Duke Nukem 3D + case 63://Shadow Warrior + case 69://Blood + case 70://Lee + case 71://Nam + opl.m_volumeScale = OPL3::VOLUME_APOGEE; + break; + } + } + + opl.NumCards = config->NumCards; + opl.NumFourOps = config->NumFourOps; + cmf_percussion_mode = false; + opl.Reset(); + trackStart = true; + loopStart = true; + loopStart_passed = false; + invalidLoop = false; + loopStart_hit = false; + bool is_GMF = false; // GMD/MUS files (ScummVM) + bool is_MUS = false; // MUS/DMX files (Doom) + bool is_IMF = false; // IMF + bool is_CMF = false; // Creative Music format (CMF/CTMF) + //std::vector<unsigned char> MUS_instrumentList; + + if(std::memcmp(HeaderBuf, "GMF\x1", 4) == 0) + { + // GMD/MUS files (ScummVM) + fr.seek(7 - static_cast<long>(HeaderSize), SEEK_CUR); + is_GMF = true; + } + else if(std::memcmp(HeaderBuf, "MUS\x1A", 4) == 0) + { + // MUS/DMX files (Doom) + uint64_t start = ReadLEint(HeaderBuf + 6, 2); + is_MUS = true; + fr.seek(static_cast<long>(start), SEEK_SET); + } + else if(std::memcmp(HeaderBuf, "CTMF", 4) == 0) + { + opl.dynamic_instruments.clear(); + opl.dynamic_metainstruments.clear(); + // Creative Music Format (CMF). + // When playing CTMF files, use the following commandline: + // adlmidi song8.ctmf -p -v 1 1 0 + // i.e. enable percussion mode, deeper vibrato, and use only 1 card. + is_CMF = true; + //unsigned version = ReadLEint(HeaderBuf+4, 2); + uint64_t ins_start = ReadLEint(HeaderBuf + 6, 2); + uint64_t mus_start = ReadLEint(HeaderBuf + 8, 2); + //unsigned deltas = ReadLEint(HeaderBuf+10, 2); + uint64_t ticks = ReadLEint(HeaderBuf + 12, 2); + // Read title, author, remarks start offsets in file + fr.read(HeaderBuf, 1, 6); + //unsigned long notes_starts[3] = {ReadLEint(HeaderBuf+0,2),ReadLEint(HeaderBuf+0,4),ReadLEint(HeaderBuf+0,6)}; + fr.seek(16, SEEK_CUR); // Skip the channels-in-use table + fr.read(HeaderBuf, 1, 4); + uint64_t ins_count = ReadLEint(HeaderBuf + 0, 2); //, basictempo = ReadLEint(HeaderBuf+2, 2); + fr.seek(static_cast<long>(ins_start), SEEK_SET); + + //std::printf("%u instruments\n", ins_count); + for(unsigned i = 0; i < ins_count; ++i) + { + unsigned char InsData[16]; + fr.read(InsData, 1, 16); + /*std::printf("Ins %3u: %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X\n", + i, InsData[0],InsData[1],InsData[2],InsData[3], InsData[4],InsData[5],InsData[6],InsData[7], + InsData[8],InsData[9],InsData[10],InsData[11], InsData[12],InsData[13],InsData[14],InsData[15]);*/ + struct adldata adl; + struct adlinsdata adlins; + adl.modulator_E862 = + ((static_cast<uint32_t>(InsData[8] & 0x07) << 24) & 0xFF000000) //WaveForm + | ((static_cast<uint32_t>(InsData[6]) << 16) & 0x00FF0000) //Sustain/Release + | ((static_cast<uint32_t>(InsData[4]) << 8) & 0x0000FF00) //Attack/Decay + | ((static_cast<uint32_t>(InsData[0]) << 0) & 0x000000FF); //MultKEVA + adl.carrier_E862 = + ((static_cast<uint32_t>(InsData[9] & 0x07) << 24) & 0xFF000000) //WaveForm + | ((static_cast<uint32_t>(InsData[7]) << 16) & 0x00FF0000) //Sustain/Release + | ((static_cast<uint32_t>(InsData[5]) << 8) & 0x0000FF00) //Attack/Decay + | ((static_cast<uint32_t>(InsData[1]) << 0) & 0x000000FF); //MultKEVA + adl.modulator_40 = InsData[2]; + adl.carrier_40 = InsData[3]; + adl.feedconn = InsData[10] & 0x0F; + adl.finetune = 0; + adlins.adlno1 = static_cast<uint16_t>(opl.dynamic_instruments.size() | opl.DynamicInstrumentTag); + adlins.adlno2 = adlins.adlno1; + adlins.ms_sound_kon = 1000; + adlins.ms_sound_koff = 500; + adlins.tone = 0; + adlins.flags = 0; + adlins.fine_tune = 0.0; + opl.dynamic_metainstruments.push_back(adlins); + opl.dynamic_instruments.push_back(adl); + } + + fr.seeku(mus_start, SEEK_SET); + TrackCount = 1; + DeltaTicks = ticks; + opl.AdlBank = ~0u; // Ignore AdlBank number, use dynamic banks instead + //std::printf("CMF deltas %u ticks %u, basictempo = %u\n", deltas, ticks, basictempo); + opl.LogarithmicVolumes = true; + opl.AdlPercussionMode = true; + opl.m_volumeScale = OPL3::VOLUME_CMF; + } + else + { + // Try parsing as an IMF file + { + size_t end = static_cast<uint8_t>(HeaderBuf[0]) + 256 * static_cast<uint8_t>(HeaderBuf[1]); + + if(!end || (end & 3)) + goto not_imf; + + size_t backup_pos = fr.tell(); + int64_t sum1 = 0, sum2 = 0; + fr.seek(2, SEEK_SET); + + for(unsigned n = 0; n < 42; ++n) + { + int64_t value1 = fr.getc(); + value1 += fr.getc() << 8; + sum1 += value1; + int64_t value2 = fr.getc(); + value2 += fr.getc() << 8; + sum2 += value2; + } + + fr.seek(static_cast<long>(backup_pos), SEEK_SET); + + if(sum1 > sum2) + { + is_IMF = true; + DeltaTicks = 1; + } + } + + if(!is_IMF) + { +not_imf: + + if(std::memcmp(HeaderBuf, "MThd\0\0\0\6", 8) != 0) + { +InvFmt: + fr.close(); + ADLMIDI_ErrorString = fr._fileName + ": Invalid format\n"; + return false; + } + + /*size_t Fmt =*/ ReadBEint(HeaderBuf + 8, 2); + TrackCount = ReadBEint(HeaderBuf + 10, 2); + DeltaTicks = ReadBEint(HeaderBuf + 12, 2); + } + } + + TrackData.clear(); + TrackData.resize(TrackCount, std::vector<uint8_t>()); + CurrentPosition.track.clear(); + CurrentPosition.track.resize(TrackCount); + InvDeltaTicks = fraction<long>(1, 1000000l * static_cast<long>(DeltaTicks)); + //Tempo = 1000000l * InvDeltaTicks; + Tempo = fraction<long>(1, static_cast<long>(DeltaTicks)); + static const unsigned char EndTag[4] = {0xFF, 0x2F, 0x00, 0x00}; + int totalGotten = 0; + + for(size_t tk = 0; tk < TrackCount; ++tk) + { + // Read track header + size_t TrackLength; + + if(is_IMF) + { + //std::fprintf(stderr, "Reading IMF file...\n"); + size_t end = static_cast<uint8_t>(HeaderBuf[0]) + 256 * static_cast<uint8_t>(HeaderBuf[1]); + unsigned IMF_tempo = 1428; + static const unsigned char imf_tempo[] = {0xFF, 0x51, 0x4, + static_cast<uint8_t>(IMF_tempo >> 24), + static_cast<uint8_t>(IMF_tempo >> 16), + static_cast<uint8_t>(IMF_tempo >> 8), + static_cast<uint8_t>(IMF_tempo) + }; + TrackData[tk].insert(TrackData[tk].end(), imf_tempo, imf_tempo + sizeof(imf_tempo)); + TrackData[tk].push_back(0x00); + fr.seek(2, SEEK_SET); + + while(fr.tell() < end && !fr.eof()) + { + uint8_t special_event_buf[5]; + special_event_buf[0] = 0xFF; + special_event_buf[1] = 0xE3; + special_event_buf[2] = 0x02; + special_event_buf[3] = static_cast<uint8_t>(fr.getc()); // port index + special_event_buf[4] = static_cast<uint8_t>(fr.getc()); // port value + uint32_t delay = static_cast<uint16_t>(fr.getc()); + delay += 256 * static_cast<uint16_t>(fr.getc()); + totalGotten += 4; + //if(special_event_buf[3] <= 8) continue; + //fprintf(stderr, "Put %02X <- %02X, plus %04X delay\n", special_event_buf[3],special_event_buf[4], delay); + TrackData[tk].insert(TrackData[tk].end(), special_event_buf, special_event_buf + 5); + + //if(delay>>21) TrackData[tk].push_back( 0x80 | ((delay>>21) & 0x7F ) ); + if(delay >> 14) + TrackData[tk].push_back(0x80 | ((delay >> 14) & 0x7F)); + + if(delay >> 7) + TrackData[tk].push_back(0x80 | ((delay >> 7) & 0x7F)); + + TrackData[tk].push_back(((delay >> 0) & 0x7F)); + } + + TrackData[tk].insert(TrackData[tk].end(), EndTag + 0, EndTag + 4); + CurrentPosition.track[tk].delay = 0; + CurrentPosition.began = true; + //std::fprintf(stderr, "Done reading IMF file\n"); + opl.NumFourOps = 0; //Don't use 4-operator channels for IMF playing! + } + else + { + if(is_GMF || is_CMF) // Take the rest of the file + { + size_t pos = fr.tell(); + fr.seek(0, SEEK_END); + TrackLength = fr.tell() - pos; + fr.seek(static_cast<long>(pos), SEEK_SET); + } + else if(is_MUS) // Read TrackLength from file position 4 + { + size_t pos = fr.tell(); + fr.seek(4, SEEK_SET); + TrackLength = static_cast<size_t>(fr.getc()); + TrackLength += static_cast<size_t>(fr.getc() << 8); + fr.seek(static_cast<long>(pos), SEEK_SET); + } + else + { + fsize = fr.read(HeaderBuf, 1, 8); + + if(std::memcmp(HeaderBuf, "MTrk", 4) != 0) + goto InvFmt; + + TrackLength = ReadBEint(HeaderBuf + 4, 4); + } + + // Read track data + TrackData[tk].resize(TrackLength); + fsize = fr.read(&TrackData[tk][0], 1, TrackLength); + totalGotten += fsize; + + if(is_GMF || is_MUS) // Note: CMF does include the track end tag. + TrackData[tk].insert(TrackData[tk].end(), EndTag + 0, EndTag + 4); + + bool ok = false; + // Read next event time + uint64_t tkDelay = ReadVarLenEx(tk, ok); + + if(ok) + CurrentPosition.track[tk].delay = static_cast<long>(tkDelay); + else + { + std::stringstream msg; + msg << fr._fileName << ": invalid variable length in the track " << tk << "! (error code " << tkDelay << ")"; + ADLMIDI_ErrorString = msg.str(); + return false; + } + } + } + + for(size_t tk = 0; tk < TrackCount; ++tk) + totalGotten += TrackData[tk].size(); + + if(totalGotten == 0) + { + ADLMIDI_ErrorString = fr._fileName + ": Empty track data"; + return false; + } + + opl.Reset(); // Reset AdLib + //opl.Reset(); // ...twice (just in case someone misprogrammed OPL3 previously) + ch.clear(); + ch.resize(opl.NumChannels); + return true; +} |