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winamp/Src/external_dependencies/openmpt-trunk/soundlib/Load_mt2.cpp
Jef 20d28e80a5 Initial community commit
2024-09-24 14:54:57 +02:00

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/*
* Load_mt2.cpp
* ------------
* Purpose: MT2 (MadTracker 2) module loader
* Notes : A couple of things are not handled properly or not at all, such as internal effects and automation envelopes
* Authors: Olivier Lapicque
* OpenMPT Devs
* The OpenMPT source code is released under the BSD license. Read LICENSE for more details.
*/
#include "stdafx.h"
#include "Loaders.h"
#ifdef MPT_EXTERNAL_SAMPLES
// For loading external samples
#include "../common/mptPathString.h"
#endif // MPT_EXTERNAL_SAMPLES
#ifdef MPT_WITH_VST
#include "../mptrack/Vstplug.h"
#endif // MPT_WITH_VST
OPENMPT_NAMESPACE_BEGIN
struct MT2FileHeader
{
enum MT2HeaderFlags
{
packedPatterns = 0x01,
automation = 0x02,
drumsAutomation = 0x08,
masterAutomation = 0x10,
};
char signature[4]; // "MT20"
uint32le userID;
uint16le version;
char trackerName[32]; // "MadTracker 2.0"
char songName[64];
uint16le numOrders;
uint16le restartPos;
uint16le numPatterns;
uint16le numChannels;
uint16le samplesPerTick;
uint8le ticksPerLine;
uint8le linesPerBeat;
uint32le flags; // See HeaderFlags
uint16le numInstruments;
uint16le numSamples;
};
MPT_BINARY_STRUCT(MT2FileHeader, 126)
struct MT2DrumsData
{
uint16le numDrumPatterns;
uint16le DrumSamples[8];
uint8le DrumPatternOrder[256];
};
MPT_BINARY_STRUCT(MT2DrumsData, 274)
struct MT2TrackSettings
{
uint16le volume;
uint8le trackfx; // Built-in effect type is used
uint8le output;
uint16le fxID;
uint16le trackEffectParam[64][8];
};
MPT_BINARY_STRUCT(MT2TrackSettings, 1030)
struct MT2Command
{
uint8 note; // 0=nothing, 97=note off
uint8 instr;
uint8 vol;
uint8 pan;
uint8 fxcmd;
uint8 fxparam1;
uint8 fxparam2;
};
MPT_BINARY_STRUCT(MT2Command, 7)
struct MT2EnvPoint
{
uint16le x;
uint16le y;
};
MPT_BINARY_STRUCT(MT2EnvPoint, 4)
struct MT2Instrument
{
enum EnvTypes
{
VolumeEnv = 1,
PanningEnv = 2,
PitchEnv = 4,
FilterEnv = 8,
};
uint16le numSamples;
uint8le groupMap[96];
uint8le vibtype, vibsweep, vibdepth, vibrate;
uint16le fadeout;
uint16le nna;
};
MPT_BINARY_STRUCT(MT2Instrument, 106)
struct MT2IEnvelope
{
uint8le flags;
uint8le numPoints;
uint8le sustainPos;
uint8le loopStart;
uint8le loopEnd;
uint8le reserved[3];
MT2EnvPoint points[16];
};
MPT_BINARY_STRUCT(MT2IEnvelope, 72)
// Note: The order of these fields differs a bit in MTIOModule_MT2.cpp - maybe just typos, I'm not sure.
// This struct follows the save format of MadTracker 2.6.1.
struct MT2InstrSynth
{
uint8le synthID;
uint8le effectID; // 0 = Lowpass filter, 1 = Highpass filter
uint16le cutoff; // 100...11000 Hz
uint8le resonance; // 0...128
uint8le attack; // 0...128
uint8le decay; // 0...128
uint8le midiChannel; // 0...15
int8le device; // VST slot (positive) or MIDI device (negative)
int8le unknown1; // Missing in MTIOModule_MT2.cpp
uint8le volume; // 0...255
int8le finetune; // -96...96
int8le transpose; // -48...48
uint8le unknown2; // Seems to be equal to instrument number.
uint8le unknown3;
uint8le midiProgram;
uint8le reserved[16];
};
MPT_BINARY_STRUCT(MT2InstrSynth, 32)
struct MT2Sample
{
uint32le length;
uint32le frequency;
uint8le depth;
uint8le channels;
uint8le flags;
uint8le loopType;
uint32le loopStart;
uint32le loopEnd;
uint16le volume;
int8le panning;
int8le note;
int16le spb;
};
MPT_BINARY_STRUCT(MT2Sample, 26)
struct MT2Group
{
uint8le sample;
uint8le vol; // 0...128
int8le pitch; // -128...127
uint8le reserved[5];
};
MPT_BINARY_STRUCT(MT2Group, 8)
struct MT2VST
{
char dll[64];
char programName[28];
uint32le fxID;
uint32le fxVersion;
uint32le programNr;
uint8le useChunks;
uint8le track;
int8le pan; // Not imported - could use pan mix mode for D/W ratio, but this is not implemented for instrument plugins!
char reserved[17];
uint32le n;
};
MPT_BINARY_STRUCT(MT2VST, 128)
static bool ConvertMT2Command(CSoundFile *that, ModCommand &m, MT2Command &p)
{
bool hasLegacyTempo = false;
// Note
m.note = NOTE_NONE;
if(p.note) m.note = (p.note > 96) ? NOTE_KEYOFF : (p.note + NOTE_MIN + 11);
// Instrument
m.instr = p.instr;
// Volume Column
if(p.vol >= 0x10 && p.vol <= 0x90)
{
m.volcmd = VOLCMD_VOLUME;
m.vol = (p.vol - 0x10) / 2;
} else if(p.vol >= 0xA0 && p.vol <= 0xAF)
{
m.volcmd = VOLCMD_VOLSLIDEDOWN;
m.vol = (p.vol & 0x0F);
} else if(p.vol >= 0xB0 && p.vol <= 0xBF)
{
m.volcmd = VOLCMD_VOLSLIDEUP;
m.vol = (p.vol & 0x0F);
} else if(p.vol >= 0xC0 && p.vol <= 0xCF)
{
m.volcmd = VOLCMD_FINEVOLDOWN;
m.vol = (p.vol & 0x0F);
} else if(p.vol >= 0xD0 && p.vol <= 0xDF)
{
m.volcmd = VOLCMD_FINEVOLUP;
m.vol = (p.vol & 0x0F);
}
// Effects
if(p.fxcmd || p.fxparam1 || p.fxparam2)
{
switch(p.fxcmd)
{
case 0x00: // FastTracker effect
m.command = p.fxparam2;
m.param = p.fxparam1;
CSoundFile::ConvertModCommand(m);
#ifdef MODPLUG_TRACKER
m.Convert(MOD_TYPE_XM, MOD_TYPE_IT, *that);
#else
MPT_UNREFERENCED_PARAMETER(that);
#endif // MODPLUG_TRACKER
if(p.fxparam2 == 0x0F)
hasLegacyTempo = true;
break;
case 0x01: // Portamento up (on every tick)
m.command = CMD_PORTAMENTOUP;
m.param = mpt::saturate_cast<ModCommand::PARAM>((p.fxparam2 << 4) | (p.fxparam1 >> 4));
break;
case 0x02: // Portamento down (on every tick)
m.command = CMD_PORTAMENTODOWN;
m.param = mpt::saturate_cast<ModCommand::PARAM>((p.fxparam2 << 4) | (p.fxparam1 >> 4));
break;
case 0x03: // Tone Portamento (on every tick)
m.command = CMD_TONEPORTAMENTO;
m.param = mpt::saturate_cast<ModCommand::PARAM>((p.fxparam2 << 4) | (p.fxparam1 >> 4));
break;
case 0x04: // Vibrato
m.command = CMD_VIBRATO;
m.param = (p.fxparam2 & 0xF0) | (p.fxparam1 >> 4);
break;
case 0x08: // Panning + Polarity (we can only import panning for now)
if(p.fxparam1)
{
m.command = CMD_PANNING8;
m.param = p.fxparam1;
} else if(p.fxparam2 == 1 || p.fxparam2 == 2)
{
// Invert left or right channel
m.command = CMD_S3MCMDEX;
m.param = 0x91;
}
break;
case 0x0C: // Set volume (0x80 = 100%)
m.command = CMD_VOLUME;
m.param = p.fxparam2 / 2;
break;
case 0x0F: // Set tempo, LPB and ticks (we can only import tempo for now)
if(p.fxparam2 != 0)
{
m.command = CMD_TEMPO;
m.param = p.fxparam2;
} else
{
m.command = CMD_SPEED;
m.param = (p.fxparam1 & 0x0F);
}
break;
case 0x10: // Impulse Tracker effect
m.command = p.fxparam2;
m.param = p.fxparam1;
CSoundFile::S3MConvert(m, true);
if(m.command == CMD_TEMPO || m.command == CMD_SPEED)
hasLegacyTempo = true;
break;
case 0x1D: // Gapper (like IT Tremor with old FX, i.e. 1D 00 XY = ontime X + 1 ticks, offtime Y + 1 ticks)
m.command = CMD_TREMOR;
m.param = p.fxparam1;
break;
case 0x20: // Cutoff + Resonance (we can only import cutoff for now)
m.command = CMD_MIDI;
m.param = p.fxparam2 >> 1;
break;
case 0x22: // Cutoff + Resonance + Attack + Decay (we can only import cutoff for now)
m.command = CMD_MIDI;
m.param = (p.fxparam2 & 0xF0) >> 1;
break;
case 0x24: // Reverse
m.command = CMD_S3MCMDEX;
m.param = 0x9F;
break;
case 0x80: // Track volume
m.command = CMD_CHANNELVOLUME;
m.param = p.fxparam2 / 4u;
break;
case 0x9D: // Offset + delay
m.volcmd = VOLCMD_OFFSET;
m.vol = p.fxparam2 >> 3;
m.command = CMD_S3MCMDEX;
m.param = 0xD0 | std::min(p.fxparam1, uint8(0x0F));
break;
case 0xCC: // MIDI CC
//m.command = CMD_MIDI;
break;
// TODO: More MT2 Effects
}
}
if(p.pan)
{
if(m.command == CMD_NONE)
{
m.command = CMD_PANNING8;
m.param = p.pan;
} else if(m.volcmd == VOLCMD_NONE)
{
m.volcmd = VOLCMD_PANNING;
m.vol = p.pan / 4;
}
}
return hasLegacyTempo;
}
// This doesn't really do anything but skipping the envelope chunk at the moment.
static void ReadMT2Automation(uint16 version, FileReader &file)
{
uint32 flags;
uint32 trkfxid;
if(version >= 0x203)
{
flags = file.ReadUint32LE();
trkfxid = file.ReadUint32LE();
} else
{
flags = file.ReadUint16LE();
trkfxid = file.ReadUint16LE();
}
MPT_UNREFERENCED_PARAMETER(trkfxid);
while(flags != 0)
{
if(flags & 1)
{
file.Skip(4 + sizeof(MT2EnvPoint) * 64);
}
flags >>= 1;
}
}
static bool ValidateHeader(const MT2FileHeader &fileHeader)
{
if(std::memcmp(fileHeader.signature, "MT20", 4)
|| fileHeader.version < 0x200 || fileHeader.version >= 0x300
|| fileHeader.numChannels < 1 || fileHeader.numChannels > 64
|| fileHeader.numOrders > 256
|| fileHeader.numInstruments >= MAX_INSTRUMENTS
|| fileHeader.numSamples >= MAX_SAMPLES
)
{
return false;
}
return true;
}
static uint64 GetHeaderMinimumAdditionalSize(const MT2FileHeader &fileHeader)
{
MPT_UNREFERENCED_PARAMETER(fileHeader);
return 256;
}
CSoundFile::ProbeResult CSoundFile::ProbeFileHeaderMT2(MemoryFileReader file, const uint64 *pfilesize)
{
MT2FileHeader fileHeader;
if(!file.ReadStruct(fileHeader))
{
return ProbeWantMoreData;
}
if(!ValidateHeader(fileHeader))
{
return ProbeFailure;
}
return ProbeAdditionalSize(file, pfilesize, GetHeaderMinimumAdditionalSize(fileHeader));
}
bool CSoundFile::ReadMT2(FileReader &file, ModLoadingFlags loadFlags)
{
file.Rewind();
MT2FileHeader fileHeader;
if(!file.ReadStruct(fileHeader))
{
return false;
}
if(!ValidateHeader(fileHeader))
{
return false;
}
if(!file.CanRead(mpt::saturate_cast<FileReader::off_t>(GetHeaderMinimumAdditionalSize(fileHeader))))
{
return false;
}
if(loadFlags == onlyVerifyHeader)
{
return true;
}
InitializeGlobals(MOD_TYPE_MT2);
InitializeChannels();
m_modFormat.formatName = MPT_UFORMAT("MadTracker {}.{}")(fileHeader.version >> 8, mpt::ufmt::hex0<2>(fileHeader.version & 0xFF));
m_modFormat.type = U_("mt2");
m_modFormat.madeWithTracker = mpt::ToUnicode(mpt::Charset::Windows1252, mpt::String::ReadBuf(mpt::String::maybeNullTerminated, fileHeader.trackerName));
m_modFormat.charset = mpt::Charset::Windows1252;
m_songName = mpt::String::ReadBuf(mpt::String::maybeNullTerminated, fileHeader.songName);
m_nChannels = fileHeader.numChannels;
m_nDefaultSpeed = Clamp<uint8, uint8>(fileHeader.ticksPerLine, 1, 31);
m_nDefaultTempo.Set(125);
m_SongFlags = SONG_LINEARSLIDES | SONG_ITCOMPATGXX | SONG_EXFILTERRANGE;
m_nInstruments = fileHeader.numInstruments;
m_nSamples = fileHeader.numSamples;
m_nDefaultRowsPerBeat = Clamp<uint8, uint8>(fileHeader.linesPerBeat, 1, 32);
m_nDefaultRowsPerMeasure = m_nDefaultRowsPerBeat * 4;
m_nVSTiVolume = 48;
m_nSamplePreAmp = 48 * 2; // Double pre-amp because we will halve the volume of all non-drum instruments, because the volume of drum samples can exceed that of normal samples
uint8 orders[256];
file.ReadArray(orders);
ReadOrderFromArray(Order(), orders, fileHeader.numOrders);
Order().SetRestartPos(fileHeader.restartPos);
// This value is supposed to be the size of the drums data, but in old MT2.0 files it's 8 bytes too small.
// MadTracker itself unconditionally reads 274 bytes here if the value is != 0, so we do the same.
const bool hasDrumChannels = file.ReadUint16LE() != 0;
FileReader drumData = file.ReadChunk(hasDrumChannels ? sizeof(MT2DrumsData) : 0);
FileReader extraData = file.ReadChunk(file.ReadUint32LE());
const CHANNELINDEX channelsWithoutDrums = m_nChannels;
static_assert(MAX_BASECHANNELS >= 64 + 8);
if(hasDrumChannels)
{
m_nChannels += 8;
}
bool hasLegacyTempo = false;
// Read patterns
if(loadFlags & loadPatternData)
Patterns.ResizeArray(fileHeader.numPatterns);
for(PATTERNINDEX pat = 0; pat < fileHeader.numPatterns; pat++)
{
ROWINDEX numRows = file.ReadUint16LE();
FileReader chunk = file.ReadChunk((file.ReadUint32LE() + 1) & ~1);
LimitMax(numRows, MAX_PATTERN_ROWS);
if(!numRows
|| !(loadFlags & loadPatternData)
|| !Patterns.Insert(pat, numRows))
{
continue;
}
if(fileHeader.flags & MT2FileHeader::packedPatterns)
{
ROWINDEX row = 0;
CHANNELINDEX chn = 0;
while(chunk.CanRead(1))
{
MT2Command cmd;
uint8 infobyte = chunk.ReadUint8();
uint8 repeatCount = 0;
if(infobyte == 0xFF)
{
repeatCount = chunk.ReadUint8();
infobyte = chunk.ReadUint8();
}
if(infobyte & 0x7F)
{
ModCommand *m = Patterns[pat].GetpModCommand(row, chn);
MemsetZero(cmd);
if(infobyte & 0x01) cmd.note = chunk.ReadUint8();
if(infobyte & 0x02) cmd.instr = chunk.ReadUint8();
if(infobyte & 0x04) cmd.vol = chunk.ReadUint8();
if(infobyte & 0x08) cmd.pan = chunk.ReadUint8();
if(infobyte & 0x10) cmd.fxcmd = chunk.ReadUint8();
if(infobyte & 0x20) cmd.fxparam1 = chunk.ReadUint8();
if(infobyte & 0x40) cmd.fxparam2 = chunk.ReadUint8();
hasLegacyTempo |= ConvertMT2Command(this, *m, cmd);
const ModCommand &orig = *m;
const ROWINDEX fillRows = std::min((uint32)repeatCount, (uint32)numRows - (row + 1));
for(ROWINDEX r = 0; r < fillRows; r++)
{
m += GetNumChannels();
// cppcheck false-positive
// cppcheck-suppress selfAssignment
*m = orig;
}
}
row += repeatCount + 1;
while(row >= numRows) { row -= numRows; chn++; }
if(chn >= channelsWithoutDrums) break;
}
} else
{
for(ROWINDEX row = 0; row < numRows; row++)
{
auto rowData = Patterns[pat].GetRow(row);
for(CHANNELINDEX chn = 0; chn < channelsWithoutDrums; chn++)
{
MT2Command cmd;
chunk.ReadStruct(cmd);
hasLegacyTempo |= ConvertMT2Command(this, rowData[chn], cmd);
}
}
}
}
if(fileHeader.samplesPerTick > 1 && fileHeader.samplesPerTick < 5000)
{
if(hasLegacyTempo)
{
m_nDefaultTempo.SetRaw(Util::muldivr(110250, TEMPO::fractFact, fileHeader.samplesPerTick));
m_nTempoMode = TempoMode::Classic;
} else
{
m_nDefaultTempo = TEMPO(44100.0 * 60.0 / (m_nDefaultSpeed * m_nDefaultRowsPerBeat * fileHeader.samplesPerTick));
m_nTempoMode = TempoMode::Modern;
}
}
// Read extra data
uint32 numVST = 0;
std::vector<int8> trackRouting(GetNumChannels(), 0);
while(extraData.CanRead(8))
{
uint32 id = extraData.ReadUint32LE();
FileReader chunk = extraData.ReadChunk(extraData.ReadUint32LE());
switch(id)
{
case MagicLE("BPM+"):
if(!hasLegacyTempo)
{
m_nTempoMode = TempoMode::Modern;
double d = chunk.ReadDoubleLE();
if(d > 0.00000001)
{
m_nDefaultTempo = TEMPO(44100.0 * 60.0 / (m_nDefaultSpeed * m_nDefaultRowsPerBeat * d));
}
}
break;
case MagicLE("TFXM"):
break;
case MagicLE("TRKO"):
break;
case MagicLE("TRKS"):
m_nSamplePreAmp = chunk.ReadUint16LE() / 256u; // 131072 is 0dB... I think (that's how MTIOModule_MT2.cpp reads)
// Dirty workaround for modules that use track automation for a fade-in at the song start (e.g. Rock.mt2)
if(!m_nSamplePreAmp)
m_nSamplePreAmp = 48;
m_nVSTiVolume = m_nSamplePreAmp / 2u;
for(CHANNELINDEX c = 0; c < GetNumChannels(); c++)
{
MT2TrackSettings trackSettings;
if(chunk.ReadStruct(trackSettings))
{
ChnSettings[c].nVolume = static_cast<uint8>(trackSettings.volume >> 10); // 32768 is 0dB
trackRouting[c] = trackSettings.output;
}
}
break;
case MagicLE("TRKL"):
for(CHANNELINDEX i = 0; i < m_nChannels && chunk.CanRead(1); i++)
{
std::string name;
chunk.ReadNullString(name);
ChnSettings[i].szName = mpt::String::ReadBuf(mpt::String::spacePadded, name.c_str(), name.length());
}
break;
case MagicLE("PATN"):
for(PATTERNINDEX i = 0; i < fileHeader.numPatterns && chunk.CanRead(1) && Patterns.IsValidIndex(i); i++)
{
std::string name;
chunk.ReadNullString(name);
Patterns[i].SetName(name);
}
break;
case MagicLE("MSG\0"):
chunk.Skip(1); // Show message on startup
m_songMessage.Read(chunk, chunk.BytesLeft(), SongMessage::leCRLF);
break;
case MagicLE("PICT"):
break;
case MagicLE("SUM\0"):
{
uint8 summaryMask[6];
chunk.ReadArray(summaryMask);
std::string artist;
chunk.ReadNullString(artist);
if(artist != "Unregistered")
{
m_songArtist = mpt::ToUnicode(mpt::Charset::Windows1252, artist);
}
}
break;
case MagicLE("TMAP"):
break;
case MagicLE("MIDI"):
break;
case MagicLE("TREQ"):
break;
case MagicLE("VST2"):
numVST = chunk.ReadUint32LE();
#ifdef MPT_WITH_VST
if(!(loadFlags & loadPluginData))
{
break;
}
for(uint32 i = 0; i < std::min(numVST, uint32(MAX_MIXPLUGINS)); i++)
{
MT2VST vstHeader;
if(chunk.ReadStruct(vstHeader))
{
if(fileHeader.version >= 0x0250)
chunk.Skip(16 * 4); // Parameter automation map for 16 parameters
SNDMIXPLUGIN &mixPlug = m_MixPlugins[i];
mixPlug.Destroy();
std::string libraryName = mpt::String::ReadBuf(mpt::String::maybeNullTerminated, vstHeader.dll);
mixPlug.Info.szName = mpt::String::ReadBuf(mpt::String::maybeNullTerminated, vstHeader.programName);
if(libraryName.length() > 4 && libraryName[libraryName.length() - 4] == '.')
{
// Remove ".dll" from library name
libraryName.resize(libraryName.length() - 4 );
}
mixPlug.Info.szLibraryName = libraryName;
mixPlug.Info.dwPluginId1 = Vst::kEffectMagic;
mixPlug.Info.dwPluginId2 = vstHeader.fxID;
if(vstHeader.track >= m_nChannels)
{
mixPlug.SetMasterEffect(true);
} else
{
if(!ChnSettings[vstHeader.track].nMixPlugin)
{
ChnSettings[vstHeader.track].nMixPlugin = static_cast<PLUGINDEX>(i + 1);
} else
{
// Channel already has plugin assignment - chain the plugins
PLUGINDEX outPlug = ChnSettings[vstHeader.track].nMixPlugin - 1;
while(true)
{
if(m_MixPlugins[outPlug].GetOutputPlugin() == PLUGINDEX_INVALID)
{
m_MixPlugins[outPlug].SetOutputPlugin(static_cast<PLUGINDEX>(i));
break;
}
outPlug = m_MixPlugins[outPlug].GetOutputPlugin();
}
}
}
// Read plugin settings
uint32 dataSize;
if(vstHeader.useChunks)
{
// MT2 only ever calls effGetChunk for programs, and OpenMPT uses the defaultProgram value to determine
// whether it should use effSetChunk for programs or banks...
mixPlug.defaultProgram = -1;
LimitMax(vstHeader.n, std::numeric_limits<decltype(dataSize)>::max() - 4);
dataSize = vstHeader.n + 4;
} else
{
mixPlug.defaultProgram = vstHeader.programNr;
LimitMax(vstHeader.n, (std::numeric_limits<decltype(dataSize)>::max() / 4u) - 1);
dataSize = vstHeader.n * 4 + 4;
}
mixPlug.pluginData.resize(dataSize);
if(vstHeader.useChunks)
{
std::memcpy(mixPlug.pluginData.data(), "fEvN", 4); // 'NvEf' plugin data type
chunk.ReadRaw(mpt::span(mixPlug.pluginData.data() + 4, vstHeader.n));
} else
{
auto memFile = std::make_pair(mpt::as_span(mixPlug.pluginData), mpt::IO::Offset(0));
mpt::IO::WriteIntLE<uint32>(memFile, 0); // Plugin data type
for(uint32 param = 0; param < vstHeader.n; param++)
{
mpt::IO::Write(memFile, IEEE754binary32LE{chunk.ReadFloatLE()});
}
}
} else
{
break;
}
}
#endif // MPT_WITH_VST
break;
}
}
#ifndef NO_PLUGINS
// Now that we have both the track settings and plugins, establish the track routing by applying the same plugins to the source track as to the target track:
for(CHANNELINDEX c = 0; c < GetNumChannels(); c++)
{
int8 outTrack = trackRouting[c];
if(outTrack > c && outTrack < GetNumChannels() && ChnSettings[outTrack].nMixPlugin != 0)
{
if(ChnSettings[c].nMixPlugin == 0)
{
ChnSettings[c].nMixPlugin = ChnSettings[outTrack].nMixPlugin;
} else
{
PLUGINDEX outPlug = ChnSettings[c].nMixPlugin - 1;
for(;;)
{
if(m_MixPlugins[outPlug].GetOutputPlugin() == PLUGINDEX_INVALID)
{
m_MixPlugins[outPlug].SetOutputPlugin(ChnSettings[outTrack].nMixPlugin - 1);
break;
}
outPlug = m_MixPlugins[outPlug].GetOutputPlugin();
}
}
}
}
#endif // NO_PLUGINS
// Read drum channels
INSTRUMENTINDEX drumMap[8] = { 0 };
uint16 drumSample[8] = { 0 };
if(hasDrumChannels)
{
MT2DrumsData drumHeader;
drumData.ReadStruct(drumHeader);
// Allocate some instruments to handle the drum samples
for(INSTRUMENTINDEX i = 0; i < 8; i++)
{
drumMap[i] = GetNextFreeInstrument(m_nInstruments + 1);
drumSample[i] = drumHeader.DrumSamples[i];
if(drumMap[i] != INSTRUMENTINDEX_INVALID)
{
ModInstrument *mptIns = AllocateInstrument(drumMap[i], drumHeader.DrumSamples[i] + 1);
if(mptIns != nullptr)
{
mptIns->name = MPT_AFORMAT("Drum #{}")(i+1);
}
} else
{
drumMap[i] = 0;
}
}
// Get all the drum pattern chunks
std::vector<FileReader> patternChunks(drumHeader.numDrumPatterns);
for(uint32 pat = 0; pat < drumHeader.numDrumPatterns; pat++)
{
uint16 numRows = file.ReadUint16LE();
patternChunks[pat] = file.ReadChunk(numRows * 32);
}
std::vector<PATTERNINDEX> patMapping(fileHeader.numPatterns, PATTERNINDEX_INVALID);
for(uint32 ord = 0; ord < fileHeader.numOrders; ord++)
{
if(drumHeader.DrumPatternOrder[ord] >= drumHeader.numDrumPatterns || Order()[ord] >= fileHeader.numPatterns)
continue;
// Figure out where to write this drum pattern
PATTERNINDEX writePat = Order()[ord];
if(patMapping[writePat] == PATTERNINDEX_INVALID)
{
patMapping[writePat] = drumHeader.DrumPatternOrder[ord];
} else if(patMapping[writePat] != drumHeader.DrumPatternOrder[ord])
{
// Damn, this pattern has previously used a different drum pattern. Duplicate it...
PATTERNINDEX newPat = Patterns.Duplicate(writePat);
if(newPat != PATTERNINDEX_INVALID)
{
writePat = newPat;
Order()[ord] = writePat;
}
}
if(!Patterns.IsValidPat(writePat))
continue;
FileReader &chunk = patternChunks[drumHeader.DrumPatternOrder[ord]];
chunk.Rewind();
const ROWINDEX numRows = static_cast<ROWINDEX>(chunk.GetLength() / 32u);
for(ROWINDEX row = 0; row < Patterns[writePat].GetNumRows(); row++)
{
ModCommand *m = Patterns[writePat].GetpModCommand(row, m_nChannels - 8);
for(CHANNELINDEX chn = 0; chn < 8; chn++, m++)
{
*m = ModCommand::Empty();
if(row >= numRows)
continue;
uint8 drums[4];
chunk.ReadArray(drums);
if(drums[0] & 0x80)
{
m->note = NOTE_MIDDLEC;
m->instr = static_cast<ModCommand::INSTR>(drumMap[chn]);
uint8 delay = drums[0] & 0x1F;
if(delay)
{
LimitMax(delay, uint8(0x0F));
m->command = CMD_S3MCMDEX;
m->param = 0xD0 | delay;
}
m->volcmd = VOLCMD_VOLUME;
// Volume is 0...255, but 128 is equivalent to v64 - we compensate this by halving the global volume of all non-drum instruments
m->vol = static_cast<ModCommand::VOL>((static_cast<uint16>(drums[1]) + 3) / 4u);
}
}
}
}
}
// Read automation envelopes
if(fileHeader.flags & MT2FileHeader::automation)
{
const uint32 numEnvelopes = ((fileHeader.flags & MT2FileHeader::drumsAutomation) ? m_nChannels : channelsWithoutDrums)
+ ((fileHeader.version >= 0x0250) ? numVST : 0)
+ ((fileHeader.flags & MT2FileHeader::masterAutomation) ? 1 : 0);
for(uint32 pat = 0; pat < fileHeader.numPatterns; pat++)
{
for(uint32 env = 0; env < numEnvelopes && file.CanRead(4); env++)
{
// TODO
ReadMT2Automation(fileHeader.version, file);
}
}
}
// Read instruments
std::vector<FileReader> instrChunks(255);
for(INSTRUMENTINDEX i = 0; i < 255; i++)
{
char instrName[32];
file.ReadArray(instrName);
uint32 dataLength = file.ReadUint32LE();
if(dataLength == 32) dataLength += 108 + sizeof(MT2IEnvelope) * 4;
if(fileHeader.version > 0x0201 && dataLength) dataLength += 4;
FileReader instrChunk = instrChunks[i] = file.ReadChunk(dataLength);
ModInstrument *mptIns = nullptr;
if(i < fileHeader.numInstruments)
{
// Default sample assignment if there is no data chunk? Fixes e.g. instrument 33 in Destiny - Dream Alone.mt2
mptIns = AllocateInstrument(i + 1, i + 1);
}
if(mptIns == nullptr)
continue;
mptIns->name = mpt::String::ReadBuf(mpt::String::maybeNullTerminated, instrName);
if(!dataLength)
continue;
MT2Instrument insHeader;
instrChunk.ReadStruct(insHeader);
uint16 flags = 0;
if(fileHeader.version >= 0x0201) flags = instrChunk.ReadUint16LE();
uint32 envMask = MT2Instrument::VolumeEnv | MT2Instrument::PanningEnv;
if(fileHeader.version >= 0x0202) envMask = instrChunk.ReadUint32LE();
mptIns->nFadeOut = insHeader.fadeout;
const NewNoteAction NNA[4] = { NewNoteAction::NoteCut, NewNoteAction::Continue, NewNoteAction::NoteOff, NewNoteAction::NoteFade };
const DuplicateCheckType DCT[4] = { DuplicateCheckType::None, DuplicateCheckType::Note, DuplicateCheckType::Sample, DuplicateCheckType::Instrument };
const DuplicateNoteAction DNA[4] = { DuplicateNoteAction::NoteCut, DuplicateNoteAction::NoteFade /* actually continue, but IT doesn't have that */, DuplicateNoteAction::NoteOff, DuplicateNoteAction::NoteFade };
mptIns->nNNA = NNA[insHeader.nna & 3];
mptIns->nDCT = DCT[(insHeader.nna >> 8) & 3];
mptIns->nDNA = DNA[(insHeader.nna >> 12) & 3];
// Load envelopes
for(uint32 env = 0; env < 4; env++)
{
if(envMask & 1)
{
MT2IEnvelope mt2Env;
instrChunk.ReadStruct(mt2Env);
const EnvelopeType envType[4] = { ENV_VOLUME, ENV_PANNING, ENV_PITCH, ENV_PITCH };
InstrumentEnvelope &mptEnv = mptIns->GetEnvelope(envType[env]);
mptEnv.dwFlags.set(ENV_FILTER, (env == 3) && (mt2Env.flags & 1) != 0);
mptEnv.dwFlags.set(ENV_ENABLED, (mt2Env.flags & 1) != 0);
mptEnv.dwFlags.set(ENV_SUSTAIN, (mt2Env.flags & 2) != 0);
mptEnv.dwFlags.set(ENV_LOOP, (mt2Env.flags & 4) != 0);
mptEnv.resize(std::min(mt2Env.numPoints.get(), uint8(16)));
mptEnv.nSustainStart = mptEnv.nSustainEnd = mt2Env.sustainPos;
mptEnv.nLoopStart = mt2Env.loopStart;
mptEnv.nLoopEnd = mt2Env.loopEnd;
for(uint32 p = 0; p < mptEnv.size(); p++)
{
mptEnv[p].tick = mt2Env.points[p].x;
mptEnv[p].value = static_cast<uint8>(Clamp<uint16, uint16>(mt2Env.points[p].y, 0, 64));
}
}
envMask >>= 1;
}
if(!mptIns->VolEnv.dwFlags[ENV_ENABLED] && mptIns->nNNA != NewNoteAction::NoteFade)
{
mptIns->nFadeOut = int16_max;
}
mptIns->SetCutoff(0x7F, true);
mptIns->SetResonance(0, true);
if(flags)
{
MT2InstrSynth synthData;
instrChunk.ReadStruct(synthData);
if(flags & 2)
{
mptIns->SetCutoff(FrequencyToCutOff(synthData.cutoff), true);
mptIns->SetResonance(synthData.resonance, true);
}
mptIns->filterMode = synthData.effectID == 1 ? FilterMode::HighPass : FilterMode::LowPass;
if(flags & 4)
{
// VSTi / MIDI synth enabled
mptIns->nMidiChannel = synthData.midiChannel + 1;
mptIns->nMixPlug = static_cast<PLUGINDEX>(synthData.device + 1);
if(synthData.device < 0)
{
// TODO: This is a MIDI device - maybe use MIDI I/O plugin to emulate those?
mptIns->nMidiProgram = synthData.midiProgram + 1; // MT2 only seems to use this for MIDI devices, not VSTis!
}
if(synthData.transpose)
{
for(uint32 n = 0; n < std::size(mptIns->NoteMap); n++)
{
int note = NOTE_MIN + n + synthData.transpose;
Limit(note, NOTE_MIN, NOTE_MAX);
mptIns->NoteMap[n] = static_cast<uint8>(note);
}
}
// Instruments with plugin assignments never play samples at the same time!
mptIns->AssignSample(0);
}
}
}
// Read sample headers
std::bitset<256> sampleNoInterpolation;
std::bitset<256> sampleSynchronized;
for(SAMPLEINDEX i = 0; i < 256; i++)
{
char sampleName[32];
file.ReadArray(sampleName);
uint32 dataLength = file.ReadUint32LE();
FileReader sampleChunk = file.ReadChunk(dataLength);
if(i < fileHeader.numSamples)
{
m_szNames[i + 1] = mpt::String::ReadBuf(mpt::String::maybeNullTerminated, sampleName);
}
if(dataLength && i < fileHeader.numSamples)
{
ModSample &mptSmp = Samples[i + 1];
mptSmp.Initialize(MOD_TYPE_IT);
mptSmp.SetDefaultCuePoints();
MT2Sample sampleHeader;
sampleChunk.ReadStruct(sampleHeader);
mptSmp.nLength = sampleHeader.length;
mptSmp.nC5Speed = sampleHeader.frequency;
if(sampleHeader.depth > 1) { mptSmp.uFlags.set(CHN_16BIT); mptSmp.nLength /= 2u; }
if(sampleHeader.channels > 1) { mptSmp.uFlags.set(CHN_STEREO); mptSmp.nLength /= 2u; }
if(sampleHeader.loopType == 1) mptSmp.uFlags.set(CHN_LOOP);
else if(sampleHeader.loopType == 2) mptSmp.uFlags.set(CHN_LOOP | CHN_PINGPONGLOOP);
mptSmp.nLoopStart = sampleHeader.loopStart;
mptSmp.nLoopEnd = sampleHeader.loopEnd;
mptSmp.nVolume = sampleHeader.volume >> 7;
if(sampleHeader.panning == -128)
mptSmp.uFlags.set(CHN_SURROUND);
else
mptSmp.nPan = sampleHeader.panning + 128;
mptSmp.uFlags.set(CHN_PANNING);
mptSmp.RelativeTone = sampleHeader.note;
if(sampleHeader.flags & 2)
{
// Sample is synchronized to beat
// The synchronization part is not supported in OpenMPT, but synchronized samples also always play at the same pitch as C-5, which we CAN do!
sampleSynchronized[i] = true;
//mptSmp.nC5Speed = Util::muldiv(mptSmp.nC5Speed, sampleHeader.spb, 22050);
}
if(sampleHeader.flags & 5)
{
// External sample
mptSmp.uFlags.set(SMP_KEEPONDISK);
}
if(sampleHeader.flags & 8)
{
sampleNoInterpolation[i] = true;
for(INSTRUMENTINDEX drum = 0; drum < 8; drum++)
{
if(drumSample[drum] == i && Instruments[drumMap[drum]] != nullptr)
{
Instruments[drumMap[drum]]->resampling = SRCMODE_NEAREST;
}
}
}
}
}
// Read sample groups
for(INSTRUMENTINDEX ins = 0; ins < fileHeader.numInstruments; ins++)
{
if(instrChunks[ins].GetLength())
{
FileReader &chunk = instrChunks[ins];
MT2Instrument insHeader;
chunk.Rewind();
chunk.ReadStruct(insHeader);
std::vector<MT2Group> groups;
file.ReadVector(groups, insHeader.numSamples);
ModInstrument *mptIns = Instruments[ins + 1];
// Instruments with plugin assignments never play samples at the same time!
if(mptIns == nullptr || mptIns->nMixPlug != 0)
continue;
mptIns->nGlobalVol = 32; // Compensate for extended dynamic range of drum instruments
mptIns->AssignSample(0);
for(uint32 note = 0; note < 96; note++)
{
if(insHeader.groupMap[note] < insHeader.numSamples)
{
const MT2Group &group = groups[insHeader.groupMap[note]];
SAMPLEINDEX sample = group.sample + 1;
mptIns->Keyboard[note + 11 + NOTE_MIN] = sample;
if(sample > 0 && sample <= m_nSamples)
{
ModSample &mptSmp = Samples[sample];
mptSmp.nVibType = static_cast<VibratoType>(insHeader.vibtype & 3); // In fact, MT2 only implements sine vibrato
mptSmp.nVibSweep = insHeader.vibsweep;
mptSmp.nVibDepth = insHeader.vibdepth;
mptSmp.nVibRate = insHeader.vibrate;
mptSmp.nGlobalVol = uint16(group.vol) * 2;
mptSmp.nFineTune = group.pitch;
if(sampleNoInterpolation[sample - 1])
{
mptIns->resampling = SRCMODE_NEAREST;
}
if(sampleSynchronized[sample - 1])
{
mptIns->NoteMap[note + 11 + NOTE_MIN] = NOTE_MIDDLEC;
}
}
// TODO: volume, finetune for duplicated samples
}
}
}
}
if(!(loadFlags & loadSampleData))
return true;
// Read sample data
for(SAMPLEINDEX i = 0; i < m_nSamples; i++)
{
ModSample &mptSmp = Samples[i + 1];
mptSmp.Transpose(-(mptSmp.RelativeTone - 49 - (mptSmp.nFineTune / 128.0)) / 12.0);
mptSmp.nFineTune = 0;
mptSmp.RelativeTone = 0;
if(!mptSmp.uFlags[SMP_KEEPONDISK])
{
SampleIO(
mptSmp.uFlags[CHN_16BIT] ? SampleIO::_16bit : SampleIO::_8bit,
mptSmp.uFlags[CHN_STEREO] ? SampleIO::stereoSplit : SampleIO::mono,
SampleIO::littleEndian,
SampleIO::MT2)
.ReadSample(mptSmp, file);
} else
{
// External sample
const uint32 filenameSize = file.ReadUint32LE();
file.Skip(12); // Reserved
std::string filename;
file.ReadString<mpt::String::maybeNullTerminated>(filename, filenameSize);
mptSmp.filename = filename;
#if defined(MPT_EXTERNAL_SAMPLES)
if(filename.length() >= 2
&& filename[0] != '\\' // Relative path on same drive
&& filename[1] != ':') // Absolute path
{
// Relative path in same folder or sub folder
filename = ".\\" + filename;
}
SetSamplePath(i + 1, mpt::PathString::FromLocaleSilent(filename));
#elif !defined(LIBOPENMPT_BUILD_TEST)
AddToLog(LogWarning, MPT_UFORMAT("Loading external sample {} ('{}') failed: External samples are not supported.")(i + 1, mpt::ToUnicode(GetCharsetFile(), filename)));
#endif // MPT_EXTERNAL_SAMPLES
}
}
return true;
}
OPENMPT_NAMESPACE_END
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