291 lines
7.8 KiB
C++
291 lines
7.8 KiB
C++
/*
|
|
* Load_ptm.cpp
|
|
* ------------
|
|
* Purpose: PTM (PolyTracker) module loader
|
|
* Notes : (currently none)
|
|
* 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"
|
|
|
|
OPENMPT_NAMESPACE_BEGIN
|
|
|
|
struct PTMFileHeader
|
|
{
|
|
char songname[28]; // Name of song, asciiz string
|
|
uint8le dosEOF; // 26
|
|
uint8le versionLo; // 03 version of file, currently 0203h
|
|
uint8le versionHi; // 02
|
|
uint8le reserved1; // Reserved, set to 0
|
|
uint16le numOrders; // Number of orders (0..256)
|
|
uint16le numSamples; // Number of instruments (1..255)
|
|
uint16le numPatterns; // Number of patterns (1..128)
|
|
uint16le numChannels; // Number of channels (voices) used (1..32)
|
|
uint16le flags; // Set to 0
|
|
uint8le reserved2[2]; // Reserved, set to 0
|
|
char magic[4]; // Song identification, 'PTMF'
|
|
uint8le reserved3[16]; // Reserved, set to 0
|
|
uint8le chnPan[32]; // Channel panning settings, 0..15, 0 = left, 7 = middle, 15 = right
|
|
uint8le orders[256]; // Order list, valid entries 0..nOrders-1
|
|
uint16le patOffsets[128]; // Pattern offsets (*16)
|
|
};
|
|
|
|
MPT_BINARY_STRUCT(PTMFileHeader, 608)
|
|
|
|
struct PTMSampleHeader
|
|
{
|
|
enum SampleFlags
|
|
{
|
|
smpTypeMask = 0x03,
|
|
smpPCM = 0x01,
|
|
|
|
smpLoop = 0x04,
|
|
smpPingPong = 0x08,
|
|
smp16Bit = 0x10,
|
|
};
|
|
|
|
uint8le flags; // Sample type (see SampleFlags)
|
|
char filename[12]; // Name of external sample file
|
|
uint8le volume; // Default volume
|
|
uint16le c4speed; // C-4 speed (yep, not C-5)
|
|
uint8le smpSegment[2]; // Sample segment (used internally)
|
|
uint32le dataOffset; // Offset of sample data
|
|
uint32le length; // Sample size (in bytes)
|
|
uint32le loopStart; // Start of loop
|
|
uint32le loopEnd; // End of loop
|
|
uint8le gusdata[14];
|
|
char samplename[28]; // Name of sample, ASCIIZ
|
|
char magic[4]; // Sample identification, 'PTMS'
|
|
|
|
// Convert an PTM sample header to OpenMPT's internal sample header.
|
|
SampleIO ConvertToMPT(ModSample &mptSmp) const
|
|
{
|
|
mptSmp.Initialize(MOD_TYPE_S3M);
|
|
mptSmp.nVolume = std::min(volume.get(), uint8(64)) * 4;
|
|
mptSmp.nC5Speed = c4speed * 2;
|
|
|
|
mptSmp.filename = mpt::String::ReadBuf(mpt::String::maybeNullTerminated, filename);
|
|
|
|
SampleIO sampleIO(
|
|
SampleIO::_8bit,
|
|
SampleIO::mono,
|
|
SampleIO::littleEndian,
|
|
SampleIO::deltaPCM);
|
|
|
|
if((flags & smpTypeMask) == smpPCM)
|
|
{
|
|
mptSmp.nLength = length;
|
|
mptSmp.nLoopStart = loopStart;
|
|
mptSmp.nLoopEnd = loopEnd;
|
|
if(mptSmp.nLoopEnd > mptSmp.nLoopStart)
|
|
mptSmp.nLoopEnd--;
|
|
|
|
if(flags & smpLoop) mptSmp.uFlags.set(CHN_LOOP);
|
|
if(flags & smpPingPong) mptSmp.uFlags.set(CHN_PINGPONGLOOP);
|
|
if(flags & smp16Bit)
|
|
{
|
|
sampleIO |= SampleIO::_16bit;
|
|
sampleIO |= SampleIO::PTM8Dto16;
|
|
|
|
mptSmp.nLength /= 2;
|
|
mptSmp.nLoopStart /= 2;
|
|
mptSmp.nLoopEnd /= 2;
|
|
}
|
|
}
|
|
|
|
return sampleIO;
|
|
}
|
|
};
|
|
|
|
MPT_BINARY_STRUCT(PTMSampleHeader, 80)
|
|
|
|
|
|
static bool ValidateHeader(const PTMFileHeader &fileHeader)
|
|
{
|
|
if(std::memcmp(fileHeader.magic, "PTMF", 4)
|
|
|| fileHeader.dosEOF != 26
|
|
|| fileHeader.versionHi > 2
|
|
|| fileHeader.flags != 0
|
|
|| !fileHeader.numChannels
|
|
|| fileHeader.numChannels > 32
|
|
|| !fileHeader.numOrders || fileHeader.numOrders > 256
|
|
|| !fileHeader.numSamples || fileHeader.numSamples > 255
|
|
|| !fileHeader.numPatterns || fileHeader.numPatterns > 128
|
|
)
|
|
{
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
|
|
static uint64 GetHeaderMinimumAdditionalSize(const PTMFileHeader &fileHeader)
|
|
{
|
|
return fileHeader.numSamples * sizeof(PTMSampleHeader);
|
|
}
|
|
|
|
|
|
CSoundFile::ProbeResult CSoundFile::ProbeFileHeaderPTM(MemoryFileReader file, const uint64 *pfilesize)
|
|
{
|
|
PTMFileHeader fileHeader;
|
|
if(!file.ReadStruct(fileHeader))
|
|
{
|
|
return ProbeWantMoreData;
|
|
}
|
|
if(!ValidateHeader(fileHeader))
|
|
{
|
|
return ProbeFailure;
|
|
}
|
|
return ProbeAdditionalSize(file, pfilesize, GetHeaderMinimumAdditionalSize(fileHeader));
|
|
}
|
|
|
|
|
|
bool CSoundFile::ReadPTM(FileReader &file, ModLoadingFlags loadFlags)
|
|
{
|
|
file.Rewind();
|
|
|
|
PTMFileHeader 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_PTM);
|
|
|
|
m_songName = mpt::String::ReadBuf(mpt::String::maybeNullTerminated, fileHeader.songname);
|
|
|
|
m_modFormat.formatName = U_("PolyTracker");
|
|
m_modFormat.type = U_("ptm");
|
|
m_modFormat.madeWithTracker = MPT_UFORMAT("PolyTracker {}.{}")(fileHeader.versionHi.get(), mpt::ufmt::hex0<2>(fileHeader.versionLo.get()));
|
|
m_modFormat.charset = mpt::Charset::CP437;
|
|
|
|
m_SongFlags = SONG_ITCOMPATGXX | SONG_ITOLDEFFECTS;
|
|
m_nChannels = fileHeader.numChannels;
|
|
m_nSamples = std::min(static_cast<SAMPLEINDEX>(fileHeader.numSamples), static_cast<SAMPLEINDEX>(MAX_SAMPLES - 1));
|
|
ReadOrderFromArray(Order(), fileHeader.orders, fileHeader.numOrders, 0xFF, 0xFE);
|
|
|
|
// Reading channel panning
|
|
for(CHANNELINDEX chn = 0; chn < m_nChannels; chn++)
|
|
{
|
|
ChnSettings[chn].Reset();
|
|
ChnSettings[chn].nPan = ((fileHeader.chnPan[chn] & 0x0F) << 4) + 4;
|
|
}
|
|
|
|
// Reading samples
|
|
FileReader sampleHeaderChunk = file.ReadChunk(fileHeader.numSamples * sizeof(PTMSampleHeader));
|
|
for(SAMPLEINDEX smp = 0; smp < m_nSamples; smp++)
|
|
{
|
|
PTMSampleHeader sampleHeader;
|
|
sampleHeaderChunk.ReadStruct(sampleHeader);
|
|
|
|
ModSample &sample = Samples[smp + 1];
|
|
m_szNames[smp + 1] = mpt::String::ReadBuf(mpt::String::maybeNullTerminated, sampleHeader.samplename);
|
|
SampleIO sampleIO = sampleHeader.ConvertToMPT(sample);
|
|
|
|
if((loadFlags & loadSampleData) && sample.nLength && file.Seek(sampleHeader.dataOffset))
|
|
{
|
|
sampleIO.ReadSample(sample, file);
|
|
}
|
|
}
|
|
|
|
// Reading Patterns
|
|
if(!(loadFlags & loadPatternData))
|
|
{
|
|
return true;
|
|
}
|
|
|
|
Patterns.ResizeArray(fileHeader.numPatterns);
|
|
for(PATTERNINDEX pat = 0; pat < fileHeader.numPatterns; pat++)
|
|
{
|
|
if(!Patterns.Insert(pat, 64)
|
|
|| fileHeader.patOffsets[pat] == 0
|
|
|| !file.Seek(fileHeader.patOffsets[pat] << 4))
|
|
{
|
|
continue;
|
|
}
|
|
|
|
ModCommand *rowBase = Patterns[pat].GetpModCommand(0, 0);
|
|
ROWINDEX row = 0;
|
|
while(row < 64 && file.CanRead(1))
|
|
{
|
|
uint8 b = file.ReadUint8();
|
|
|
|
if(b == 0)
|
|
{
|
|
row++;
|
|
rowBase += m_nChannels;
|
|
continue;
|
|
}
|
|
CHANNELINDEX chn = (b & 0x1F);
|
|
ModCommand dummy = ModCommand();
|
|
ModCommand &m = chn < GetNumChannels() ? rowBase[chn] : dummy;
|
|
|
|
if(b & 0x20)
|
|
{
|
|
const auto [note, instr] = file.ReadArray<uint8, 2>();
|
|
m.note = note;
|
|
m.instr = instr;
|
|
if(m.note == 254)
|
|
m.note = NOTE_NOTECUT;
|
|
else if(!m.note || m.note > 120)
|
|
m.note = NOTE_NONE;
|
|
}
|
|
if(b & 0x40)
|
|
{
|
|
const auto [command, param] = file.ReadArray<uint8, 2>();
|
|
m.command = command;
|
|
m.param = param;
|
|
|
|
static constexpr EffectCommand effTrans[] = { CMD_GLOBALVOLUME, CMD_RETRIG, CMD_FINEVIBRATO, CMD_NOTESLIDEUP, CMD_NOTESLIDEDOWN, CMD_NOTESLIDEUPRETRIG, CMD_NOTESLIDEDOWNRETRIG, CMD_REVERSEOFFSET };
|
|
if(m.command < 0x10)
|
|
{
|
|
// Beware: Effect letters are as in MOD, but portamento and volume slides behave like in S3M (i.e. fine slides share the same effect letters)
|
|
ConvertModCommand(m);
|
|
} else if(m.command < 0x10 + std::size(effTrans))
|
|
{
|
|
m.command = effTrans[m.command - 0x10];
|
|
} else
|
|
{
|
|
m.command = CMD_NONE;
|
|
}
|
|
switch(m.command)
|
|
{
|
|
case CMD_PANNING8:
|
|
// Don't be surprised about the strange formula, this is directly translated from original disassembly...
|
|
m.command = CMD_S3MCMDEX;
|
|
m.param = 0x80 | ((std::max<uint8>(m.param >> 3, 1u) - 1u) & 0x0F);
|
|
break;
|
|
case CMD_GLOBALVOLUME:
|
|
m.param = std::min(m.param, uint8(0x40)) * 2u;
|
|
break;
|
|
}
|
|
}
|
|
if(b & 0x80)
|
|
{
|
|
m.volcmd = VOLCMD_VOLUME;
|
|
m.vol = file.ReadUint8();
|
|
}
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
|
|
OPENMPT_NAMESPACE_END
|