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winamp/Src/external_dependencies/openmpt-trunk/soundlib/ITTools.cpp

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/*
* ITTools.cpp
* -----------
* Purpose: Definition of IT file structures and helper functions
* Notes : (currently none)
* Authors: OpenMPT Devs
* The OpenMPT source code is released under the BSD license. Read LICENSE for more details.
*/
#include "stdafx.h"
#include "Loaders.h"
#include "ITTools.h"
#include "Tables.h"
#include "../common/mptStringBuffer.h"
#include "../common/version.h"
OPENMPT_NAMESPACE_BEGIN
// Convert OpenMPT's internal envelope format into an IT/MPTM envelope.
void ITEnvelope::ConvertToIT(const InstrumentEnvelope &mptEnv, uint8 envOffset, uint8 envDefault)
{
// Envelope Flags
if(mptEnv.dwFlags[ENV_ENABLED]) flags |= ITEnvelope::envEnabled;
if(mptEnv.dwFlags[ENV_LOOP]) flags |= ITEnvelope::envLoop;
if(mptEnv.dwFlags[ENV_SUSTAIN]) flags |= ITEnvelope::envSustain;
if(mptEnv.dwFlags[ENV_CARRY]) flags |= ITEnvelope::envCarry;
// Nodes and Loops
num = (uint8)std::min(mptEnv.size(), uint32(25));
lpb = (uint8)mptEnv.nLoopStart;
lpe = (uint8)mptEnv.nLoopEnd;
slb = (uint8)mptEnv.nSustainStart;
sle = (uint8)mptEnv.nSustainEnd;
// Envelope Data
MemsetZero(data);
if(!mptEnv.empty())
{
// Attention: Full MPTM envelope is stored in extended instrument properties
for(uint32 ev = 0; ev < num; ev++)
{
data[ev].value = static_cast<int8>(mptEnv[ev].value) - envOffset;
data[ev].tick = mptEnv[ev].tick;
}
} else
{
// Fix non-existing envelopes so that they can still be edited in Impulse Tracker.
num = 2;
data[0].value = data[1].value = envDefault - envOffset;
data[1].tick = 10;
}
}
// Convert IT/MPTM envelope data into OpenMPT's internal envelope format - To be used by ITInstrToMPT()
void ITEnvelope::ConvertToMPT(InstrumentEnvelope &mptEnv, uint8 envOffset, uint8 maxNodes) const
{
// Envelope Flags
mptEnv.dwFlags.set(ENV_ENABLED, (flags & ITEnvelope::envEnabled) != 0);
mptEnv.dwFlags.set(ENV_LOOP, (flags & ITEnvelope::envLoop) != 0);
mptEnv.dwFlags.set(ENV_SUSTAIN, (flags & ITEnvelope::envSustain) != 0);
mptEnv.dwFlags.set(ENV_CARRY, (flags & ITEnvelope::envCarry) != 0);
// Nodes and Loops
mptEnv.resize(std::min(num, maxNodes));
mptEnv.nLoopStart = std::min(lpb, maxNodes);
mptEnv.nLoopEnd = Clamp(lpe, mptEnv.nLoopStart, maxNodes);
mptEnv.nSustainStart = std::min(slb, maxNodes);
mptEnv.nSustainEnd = Clamp(sle, mptEnv.nSustainStart, maxNodes);
// Envelope Data
// Attention: Full MPTM envelope is stored in extended instrument properties
for(uint32 ev = 0; ev < std::min(uint8(25), num); ev++)
{
mptEnv[ev].value = Clamp<int8, int8>(data[ev].value + envOffset, 0, 64);
mptEnv[ev].tick = data[ev].tick;
if(ev > 0 && mptEnv[ev].tick < mptEnv[ev - 1].tick && !(mptEnv[ev].tick & 0xFF00))
{
// Fix broken envelopes... Instruments 2 and 3 in NoGap.it by Werewolf have envelope points where the high byte of envelope nodes is missing.
// NoGap.it was saved with MPT 1.07 - 1.09, which *normally* doesn't do this in IT files.
// However... It turns out that MPT 1.07 omitted the high byte of envelope nodes when saving an XI instrument file, and it looks like
// Instrument 2 and 3 in NoGap.it were loaded from XI files.
mptEnv[ev].tick |= mptEnv[ev - 1].tick & 0xFF00;
if(mptEnv[ev].tick < mptEnv[ev - 1].tick)
mptEnv[ev].tick += 0x100;
}
}
}
// Convert an ITOldInstrument to OpenMPT's internal instrument representation.
void ITOldInstrument::ConvertToMPT(ModInstrument &mptIns) const
{
// Header
if(memcmp(id, "IMPI", 4))
{
return;
}
mptIns.name = mpt::String::ReadBuf(mpt::String::spacePadded, name);
mptIns.filename = mpt::String::ReadBuf(mpt::String::nullTerminated, filename);
// Volume / Panning
mptIns.nFadeOut = fadeout << 6;
mptIns.nGlobalVol = 64;
mptIns.nPan = 128;
// NNA Stuff
mptIns.nNNA = static_cast<NewNoteAction>(nna.get());
mptIns.nDCT = static_cast<DuplicateCheckType>(dnc.get());
// Sample Map
for(size_t i = 0; i < 120; i++)
{
uint8 note = keyboard[i * 2];
SAMPLEINDEX ins = keyboard[i * 2 + 1];
if(ins < MAX_SAMPLES)
{
mptIns.Keyboard[i] = ins;
}
if(note < 120)
{
mptIns.NoteMap[i] = note + 1u;
} else
{
mptIns.NoteMap[i] = static_cast<uint8>(i + 1);
}
}
// Volume Envelope Flags
mptIns.VolEnv.dwFlags.set(ENV_ENABLED, (flags & ITOldInstrument::envEnabled) != 0);
mptIns.VolEnv.dwFlags.set(ENV_LOOP, (flags & ITOldInstrument::envLoop) != 0);
mptIns.VolEnv.dwFlags.set(ENV_SUSTAIN, (flags & ITOldInstrument::envSustain) != 0);
// Volume Envelope Loops
mptIns.VolEnv.nLoopStart = vls;
mptIns.VolEnv.nLoopEnd = vle;
mptIns.VolEnv.nSustainStart = sls;
mptIns.VolEnv.nSustainEnd = sle;
mptIns.VolEnv.resize(25);
// Volume Envelope Data
for(uint32 i = 0; i < 25; i++)
{
if((mptIns.VolEnv[i].tick = nodes[i * 2]) == 0xFF)
{
mptIns.VolEnv.resize(i);
break;
}
mptIns.VolEnv[i].value = nodes[i * 2 + 1];
}
if(std::max(mptIns.VolEnv.nLoopStart, mptIns.VolEnv.nLoopEnd) >= mptIns.VolEnv.size()) mptIns.VolEnv.dwFlags.reset(ENV_LOOP);
if(std::max(mptIns.VolEnv.nSustainStart, mptIns.VolEnv.nSustainEnd) >= mptIns.VolEnv.size()) mptIns.VolEnv.dwFlags.reset(ENV_SUSTAIN);
}
// Convert OpenMPT's internal instrument representation to an ITInstrument.
uint32 ITInstrument::ConvertToIT(const ModInstrument &mptIns, bool compatExport, const CSoundFile &sndFile)
{
MemsetZero(*this);
// Header
memcpy(id, "IMPI", 4);
trkvers = 0x5000 | static_cast<uint16>(Version::Current().GetRawVersion() >> 16);
mpt::String::WriteBuf(mpt::String::nullTerminated, filename) = mptIns.filename;
mpt::String::WriteBuf(mpt::String::nullTerminated, name) = mptIns.name;
// Volume / Panning
fadeout = static_cast<uint16>(std::min(mptIns.nFadeOut >> 5, uint32(256)));
gbv = static_cast<uint8>(std::min(mptIns.nGlobalVol * 2u, uint32(128)));
dfp = static_cast<uint8>(std::min(mptIns.nPan / 4u, uint32(64)));
if(!mptIns.dwFlags[INS_SETPANNING]) dfp |= ITInstrument::ignorePanning;
// Random Variation
rv = std::min(mptIns.nVolSwing, uint8(100));
rp = std::min(mptIns.nPanSwing, uint8(64));
// NNA Stuff
nna = static_cast<uint8>(mptIns.nNNA);
dct = static_cast<uint8>((mptIns.nDCT < DuplicateCheckType::Plugin || !compatExport) ? mptIns.nDCT : DuplicateCheckType::None);
dca = static_cast<uint8>(mptIns.nDNA);
// Pitch / Pan Separation
pps = mptIns.nPPS;
ppc = mptIns.nPPC;
// Filter Stuff
ifc = mptIns.GetCutoff() | (mptIns.IsCutoffEnabled() ? ITInstrument::enableCutoff : 0x00);
ifr = mptIns.GetResonance() | (mptIns.IsResonanceEnabled() ? ITInstrument::enableResonance : 0x00);
// MIDI Setup
if(mptIns.nMidiProgram > 0)
mpr = mptIns.nMidiProgram - 1u;
else
mpr = 0xFF;
if(mptIns.wMidiBank > 0)
{
mbank[0] = static_cast<uint8>((mptIns.wMidiBank - 1) & 0x7F);
mbank[1] = static_cast<uint8>((mptIns.wMidiBank - 1) >> 7);
} else
{
mbank[0] = 0xFF;
mbank[1] = 0xFF;
}
if(mptIns.nMidiChannel != MidiNoChannel || mptIns.nMixPlug == 0 || mptIns.nMixPlug > 127 || compatExport)
{
// Default. Prefer MIDI channel over mixplug to keep the semantics intact.
mch = mptIns.nMidiChannel;
} else
{
// Keep compatibility with MPT 1.16's instrument format if possible, as XMPlay / BASS also uses this.
mch = mptIns.nMixPlug + 128;
}
// Sample Map
nos = 0; // Only really relevant for ITI files
std::vector<bool> smpCount(sndFile.GetNumSamples(), false);
for(int i = 0; i < 120; i++)
{
keyboard[i * 2] = (mptIns.NoteMap[i] >= NOTE_MIN && mptIns.NoteMap[i] <= NOTE_MAX) ? (mptIns.NoteMap[i] - NOTE_MIN) : static_cast<uint8>(i);
const SAMPLEINDEX smp = mptIns.Keyboard[i];
if(smp < MAX_SAMPLES && smp < 256)
{
keyboard[i * 2 + 1] = static_cast<uint8>(smp);
if(smp && smp <= sndFile.GetNumSamples() && !smpCount[smp - 1])
{
// We haven't considered this sample yet. Update number of samples.
smpCount[smp - 1] = true;
nos++;
}
}
}
// Writing Volume envelope
volenv.ConvertToIT(mptIns.VolEnv, 0, 64);
// Writing Panning envelope
panenv.ConvertToIT(mptIns.PanEnv, 32, 32);
// Writing Pitch Envelope
pitchenv.ConvertToIT(mptIns.PitchEnv, 32, 32);
if(mptIns.PitchEnv.dwFlags[ENV_FILTER]) pitchenv.flags |= ITEnvelope::envFilter;
return sizeof(ITInstrument);
}
// Convert an ITInstrument to OpenMPT's internal instrument representation. Returns size of the instrument data that has been read.
uint32 ITInstrument::ConvertToMPT(ModInstrument &mptIns, MODTYPE modFormat) const
{
if(memcmp(id, "IMPI", 4))
{
return 0;
}
mptIns.name = mpt::String::ReadBuf(mpt::String::spacePadded, name);
mptIns.filename = mpt::String::ReadBuf(mpt::String::nullTerminated, filename);
// Volume / Panning
mptIns.nFadeOut = fadeout << 5;
mptIns.nGlobalVol = gbv / 2;
LimitMax(mptIns.nGlobalVol, 64u);
mptIns.nPan = (dfp & 0x7F) * 4;
if(mptIns.nPan > 256) mptIns.nPan = 128;
mptIns.dwFlags.set(INS_SETPANNING, !(dfp & ITInstrument::ignorePanning));
// Random Variation
mptIns.nVolSwing = std::min(static_cast<uint8>(rv), uint8(100));
mptIns.nPanSwing = std::min(static_cast<uint8>(rp), uint8(64));
// NNA Stuff
mptIns.nNNA = static_cast<NewNoteAction>(nna.get());
mptIns.nDCT = static_cast<DuplicateCheckType>(dct.get());
mptIns.nDNA = static_cast<DuplicateNoteAction>(dca.get());
// Pitch / Pan Separation
mptIns.nPPS = pps;
mptIns.nPPC = ppc;
// Filter Stuff
mptIns.SetCutoff(ifc & 0x7F, (ifc & ITInstrument::enableCutoff) != 0);
mptIns.SetResonance(ifr & 0x7F, (ifr & ITInstrument::enableResonance) != 0);
// MIDI Setup
// MPT used to have a slightly different encoding of MIDI program and banks which we are trying to fix here.
// Impulse Tracker / Schism Tracker will set trkvers to 0 in IT files,
// and we won't care about correctly importing MIDI programs and banks in ITI files.
// Chibi Tracker sets trkvers to 0x214, but always writes mpr=mbank=0 anyway.
// Old BeRoTracker versions set trkvers to 0x214 or 0x217.
// <= MPT 1.07 <= MPT 1.16 OpenMPT 1.17-? <= OpenMPT 1.26 definitely not MPT
if((trkvers == 0x0202 || trkvers == 0x0211 || trkvers == 0x0220 || trkvers == 0x0214) && mpr != 0xFF)
{
if(mpr <= 128)
{
mptIns.nMidiProgram = mpr;
}
uint16 bank = mbank[0] | (mbank[1] << 8);
// These versions also ignored the high bank nibble (was only handled correctly in OpenMPT instrument extensions)
if(bank <= 128)
{
mptIns.wMidiBank = bank;
}
} else
{
if(mpr < 128)
{
mptIns.nMidiProgram = mpr + 1;
}
uint16 bank = 0;
if(mbank[0] < 128)
bank = mbank[0] + 1;
if(mbank[1] < 128)
bank += (mbank[1] << 7);
mptIns.wMidiBank = bank;
}
mptIns.nMidiChannel = mch;
if(mptIns.nMidiChannel >= 128)
{
// Handle old format where MIDI channel and Plugin index are stored in the same variable
mptIns.nMixPlug = mptIns.nMidiChannel - 128;
mptIns.nMidiChannel = 0;
}
// Envelope point count. Limited to 25 in IT format.
const uint8 maxNodes = (modFormat & MOD_TYPE_MPT) ? MAX_ENVPOINTS : 25;
// Volume Envelope
volenv.ConvertToMPT(mptIns.VolEnv, 0, maxNodes);
// Panning Envelope
panenv.ConvertToMPT(mptIns.PanEnv, 32, maxNodes);
// Pitch Envelope
pitchenv.ConvertToMPT(mptIns.PitchEnv, 32, maxNodes);
mptIns.PitchEnv.dwFlags.set(ENV_FILTER, (pitchenv.flags & ITEnvelope::envFilter) != 0);
// Sample Map
for(int i = 0; i < 120; i++)
{
uint8 note = keyboard[i * 2];
SAMPLEINDEX ins = keyboard[i * 2 + 1];
if(ins < MAX_SAMPLES)
{
mptIns.Keyboard[i] = ins;
}
if(note < 120)
{
mptIns.NoteMap[i] = note + NOTE_MIN;
} else
{
mptIns.NoteMap[i] = static_cast<uint8>(i + NOTE_MIN);
}
}
return sizeof(ITInstrument);
}
// Convert OpenMPT's internal instrument representation to an ITInstrumentEx. Returns amount of bytes that need to be written to file.
uint32 ITInstrumentEx::ConvertToIT(const ModInstrument &mptIns, bool compatExport, const CSoundFile &sndFile)
{
uint32 instSize = iti.ConvertToIT(mptIns, compatExport, sndFile);
if(compatExport)
{
return instSize;
}
// Sample Map
bool usedExtension = false;
iti.nos = 0;
std::vector<bool> smpCount(sndFile.GetNumSamples(), false);
for(int i = 0; i < 120; i++)
{
const SAMPLEINDEX smp = mptIns.Keyboard[i];
keyboardhi[i] = 0;
if(smp < MAX_SAMPLES)
{
if(smp >= 256)
{
// We need to save the upper byte for this sample index.
iti.keyboard[i * 2 + 1] = static_cast<uint8>(smp & 0xFF);
keyboardhi[i] = static_cast<uint8>(smp >> 8);
usedExtension = true;
}
if(smp && smp <= sndFile.GetNumSamples() && !smpCount[smp - 1])
{
// We haven't considered this sample yet. Update number of samples.
smpCount[smp - 1] = true;
iti.nos++;
}
}
}
if(usedExtension)
{
// If we actually had to extend the sample map, update the magic bytes and instrument size.
memcpy(iti.dummy, "XTPM", 4);
instSize = sizeof(ITInstrumentEx);
}
return instSize;
}
// Convert an ITInstrumentEx to OpenMPT's internal instrument representation. Returns size of the instrument data that has been read.
uint32 ITInstrumentEx::ConvertToMPT(ModInstrument &mptIns, MODTYPE fromType) const
{
uint32 insSize = iti.ConvertToMPT(mptIns, fromType);
// Is this actually an extended instrument?
// Note: OpenMPT 1.20 - 1.22 accidentally wrote "MPTX" here (since revision 1203), while previous versions wrote the reversed version, "XTPM".
if(insSize == 0 || (memcmp(iti.dummy, "MPTX", 4) && memcmp(iti.dummy, "XTPM", 4)))
{
return insSize;
}
// Olivier's MPT Instrument Extension
for(int i = 0; i < 120; i++)
{
mptIns.Keyboard[i] |= ((SAMPLEINDEX)keyboardhi[i] << 8);
}
return sizeof(ITInstrumentEx);
}
// Convert OpenMPT's internal sample representation to an ITSample.
void ITSample::ConvertToIT(const ModSample &mptSmp, MODTYPE fromType, bool compress, bool compressIT215, bool allowExternal)
{
MemsetZero(*this);
// Header
memcpy(id, "IMPS", 4);
mpt::String::WriteBuf(mpt::String::nullTerminated, filename) = mptSmp.filename;
//mpt::String::WriteBuf(mpt::String::nullTerminated, name) = m_szNames[nsmp];
// Volume / Panning
gvl = static_cast<uint8>(mptSmp.nGlobalVol);
vol = static_cast<uint8>(mptSmp.nVolume / 4);
dfp = static_cast<uint8>(mptSmp.nPan / 4);
if(mptSmp.uFlags[CHN_PANNING]) dfp |= ITSample::enablePanning;
// Sample Format / Loop Flags
if(mptSmp.HasSampleData() && !mptSmp.uFlags[CHN_ADLIB])
{
flags = ITSample::sampleDataPresent;
if(mptSmp.uFlags[CHN_LOOP]) flags |= ITSample::sampleLoop;
if(mptSmp.uFlags[CHN_SUSTAINLOOP]) flags |= ITSample::sampleSustain;
if(mptSmp.uFlags[CHN_PINGPONGLOOP]) flags |= ITSample::sampleBidiLoop;
if(mptSmp.uFlags[CHN_PINGPONGSUSTAIN]) flags |= ITSample::sampleBidiSustain;
if(mptSmp.uFlags[CHN_STEREO])
{
flags |= ITSample::sampleStereo;
}
if(mptSmp.uFlags[CHN_16BIT])
{
flags |= ITSample::sample16Bit;
}
cvt = ITSample::cvtSignedSample;
if(compress)
{
flags |= ITSample::sampleCompressed;
if(compressIT215)
{
cvt |= ITSample::cvtDelta;
}
}
} else
{
flags = 0x00;
}
// Frequency
C5Speed = mptSmp.nC5Speed ? mptSmp.nC5Speed : 8363;
// Size and loops
length = mpt::saturate_cast<uint32>(mptSmp.nLength);
loopbegin = mpt::saturate_cast<uint32>(mptSmp.nLoopStart);
loopend = mpt::saturate_cast<uint32>(mptSmp.nLoopEnd);
susloopbegin = mpt::saturate_cast<uint32>(mptSmp.nSustainStart);
susloopend = mpt::saturate_cast<uint32>(mptSmp.nSustainEnd);
// Auto Vibrato settings
vit = AutoVibratoXM2IT[mptSmp.nVibType & 7];
vis = std::min(mptSmp.nVibRate, uint8(64));
vid = std::min(mptSmp.nVibDepth, uint8(32));
vir = std::min(mptSmp.nVibSweep, uint8(255));
if((vid | vis) != 0 && (fromType & MOD_TYPE_XM))
{
// Sweep is upside down in XM
if(mptSmp.nVibSweep != 0)
vir = mpt::saturate_cast<decltype(vir)::base_type>(Util::muldivr_unsigned(mptSmp.nVibDepth, 256, mptSmp.nVibSweep));
else
vir = 255;
}
if(mptSmp.uFlags[CHN_ADLIB])
{
length = 12;
flags = ITSample::sampleDataPresent;
cvt = ITSample::cvtOPLInstrument;
} else if(mptSmp.uFlags[SMP_KEEPONDISK])
{
#ifndef MPT_EXTERNAL_SAMPLES
allowExternal = false;
#endif // MPT_EXTERNAL_SAMPLES
// Save external sample (filename at sample pointer)
if(allowExternal && mptSmp.HasSampleData())
{
cvt = ITSample::cvtExternalSample;
} else
{
length = loopbegin = loopend = susloopbegin = susloopend = 0;
}
}
}
// Convert an ITSample to OpenMPT's internal sample representation.
uint32 ITSample::ConvertToMPT(ModSample &mptSmp) const
{
if(memcmp(id, "IMPS", 4))
{
return 0;
}
mptSmp.Initialize(MOD_TYPE_IT);
mptSmp.SetDefaultCuePoints(); // For old IT/MPTM files
mptSmp.filename = mpt::String::ReadBuf(mpt::String::nullTerminated, filename);
// Volume / Panning
mptSmp.nVolume = vol * 4;
LimitMax(mptSmp.nVolume, uint16(256));
mptSmp.nGlobalVol = gvl;
LimitMax(mptSmp.nGlobalVol, uint16(64));
mptSmp.nPan = (dfp & 0x7F) * 4;
LimitMax(mptSmp.nPan, uint16(256));
if(dfp & ITSample::enablePanning) mptSmp.uFlags.set(CHN_PANNING);
// Loop Flags
if(flags & ITSample::sampleLoop) mptSmp.uFlags.set(CHN_LOOP);
if(flags & ITSample::sampleSustain) mptSmp.uFlags.set(CHN_SUSTAINLOOP);
if(flags & ITSample::sampleBidiLoop) mptSmp.uFlags.set(CHN_PINGPONGLOOP);
if(flags & ITSample::sampleBidiSustain) mptSmp.uFlags.set(CHN_PINGPONGSUSTAIN);
// Frequency
mptSmp.nC5Speed = C5Speed;
if(!mptSmp.nC5Speed) mptSmp.nC5Speed = 8363;
if(mptSmp.nC5Speed < 256) mptSmp.nC5Speed = 256;
// Size and loops
mptSmp.nLength = length;
mptSmp.nLoopStart = loopbegin;
mptSmp.nLoopEnd = loopend;
mptSmp.nSustainStart = susloopbegin;
mptSmp.nSustainEnd = susloopend;
mptSmp.SanitizeLoops();
// Auto Vibrato settings
mptSmp.nVibType = static_cast<VibratoType>(AutoVibratoIT2XM[vit & 7]);
mptSmp.nVibRate = vis;
mptSmp.nVibDepth = vid & 0x7F;
mptSmp.nVibSweep = vir;
if(cvt == ITSample::cvtOPLInstrument)
{
// FM instrument in MPTM
mptSmp.uFlags.set(CHN_ADLIB);
} else if(cvt == ITSample::cvtExternalSample)
{
// Read external sample (filename at sample pointer)
mptSmp.uFlags.set(SMP_KEEPONDISK);
}
return samplepointer;
}
// Retrieve the internal sample format flags for this instrument.
SampleIO ITSample::GetSampleFormat(uint16 cwtv) const
{
SampleIO sampleIO(
(flags & ITSample::sample16Bit) ? SampleIO::_16bit : SampleIO::_8bit,
SampleIO::mono,
SampleIO::littleEndian,
(cvt & ITSample::cvtSignedSample) ? SampleIO::signedPCM: SampleIO::unsignedPCM);
// Some old version of IT didn't clear the stereo flag when importing samples. Luckily, all other trackers are identifying as IT 2.14+, so let's check for old IT versions.
if((flags & ITSample::sampleStereo) && cwtv >= 0x214)
{
sampleIO |= SampleIO::stereoSplit;
}
if(flags & ITSample::sampleCompressed)
{
// IT 2.14 packed sample
sampleIO |= (cvt & ITSample::cvtDelta) ? SampleIO::IT215 : SampleIO::IT214;
} else
{
// MODPlugin :(
if(!(flags & ITSample::sample16Bit) && cvt == ITSample::cvtADPCMSample)
{
sampleIO |= SampleIO::ADPCM;
} else
{
// ITTECH.TXT says these convert flags are "safe to ignore". IT doesn't ignore them, though, so why should we? :)
if(cvt & ITSample::cvtBigEndian)
{
sampleIO |= SampleIO::bigEndian;
}
if(cvt & ITSample::cvtDelta)
{
sampleIO |= SampleIO::deltaPCM;
}
if((cvt & ITSample::cvtPTM8to16) && (flags & ITSample::sample16Bit))
{
sampleIO |= SampleIO::PTM8Dto16;
}
}
}
return sampleIO;
}
// Convert an ITHistoryStruct to OpenMPT's internal edit history representation
void ITHistoryStruct::ConvertToMPT(FileHistory &mptHistory) const
{
// Decode FAT date and time
MemsetZero(mptHistory.loadDate);
if(fatdate != 0 || fattime != 0)
{
mptHistory.loadDate.tm_year = ((fatdate >> 9) & 0x7F) + 80;
mptHistory.loadDate.tm_mon = Clamp((fatdate >> 5) & 0x0F, 1, 12) - 1;
mptHistory.loadDate.tm_mday = Clamp(fatdate & 0x1F, 1, 31);
mptHistory.loadDate.tm_hour = Clamp((fattime >> 11) & 0x1F, 0, 23);
mptHistory.loadDate.tm_min = Clamp((fattime >> 5) & 0x3F, 0, 59);
mptHistory.loadDate.tm_sec = Clamp((fattime & 0x1F) * 2, 0, 59);
}
mptHistory.openTime = static_cast<uint32>(runtime * (HISTORY_TIMER_PRECISION / 18.2));
}
// Convert OpenMPT's internal edit history representation to an ITHistoryStruct
void ITHistoryStruct::ConvertToIT(const FileHistory &mptHistory)
{
// Create FAT file dates
if(mptHistory.HasValidDate())
{
fatdate = static_cast<uint16>(mptHistory.loadDate.tm_mday | ((mptHistory.loadDate.tm_mon + 1) << 5) | ((mptHistory.loadDate.tm_year - 80) << 9));
fattime = static_cast<uint16>((mptHistory.loadDate.tm_sec / 2) | (mptHistory.loadDate.tm_min << 5) | (mptHistory.loadDate.tm_hour << 11));
} else
{
fatdate = 0;
fattime = 0;
}
runtime = static_cast<uint32>(mptHistory.openTime * (18.2 / HISTORY_TIMER_PRECISION));
}
uint32 DecodeITEditTimer(uint16 cwtv, uint32 editTime)
{
if((cwtv & 0xFFF) >= 0x0208)
{
editTime ^= 0x4954524B; // 'ITRK'
editTime = mpt::rotr(editTime, 7);
editTime = ~editTime + 1;
editTime = mpt::rotl(editTime, 4);
editTime ^= 0x4A54484C; // 'JTHL'
}
return editTime;
}
OPENMPT_NAMESPACE_END
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