339 lines
7.4 KiB
C++
339 lines
7.4 KiB
C++
/*
|
|
* Load_far.cpp
|
|
* ------------
|
|
* Purpose: Farandole (FAR) module loader
|
|
* Notes : (currently none)
|
|
* Authors: OpenMPT Devs (partly inspired by Storlek's FAR loader from Schism Tracker)
|
|
* The OpenMPT source code is released under the BSD license. Read LICENSE for more details.
|
|
*/
|
|
|
|
|
|
#include "stdafx.h"
|
|
#include "Loaders.h"
|
|
|
|
|
|
OPENMPT_NAMESPACE_BEGIN
|
|
|
|
// FAR File Header
|
|
struct FARFileHeader
|
|
{
|
|
uint8le magic[4];
|
|
char songName[40];
|
|
uint8le eof[3];
|
|
uint16le headerLength;
|
|
uint8le version;
|
|
uint8le onOff[16];
|
|
uint8le editingState[9]; // Stuff we don't care about
|
|
uint8le defaultSpeed;
|
|
uint8le chnPanning[16];
|
|
uint8le patternState[4]; // More stuff we don't care about
|
|
uint16le messageLength;
|
|
};
|
|
|
|
MPT_BINARY_STRUCT(FARFileHeader, 98)
|
|
|
|
|
|
struct FAROrderHeader
|
|
{
|
|
uint8le orders[256];
|
|
uint8le numPatterns; // supposed to be "number of patterns stored in the file"; apparently that's wrong
|
|
uint8le numOrders;
|
|
uint8le restartPos;
|
|
uint16le patternSize[256];
|
|
};
|
|
|
|
MPT_BINARY_STRUCT(FAROrderHeader, 771)
|
|
|
|
|
|
// FAR Sample header
|
|
struct FARSampleHeader
|
|
{
|
|
// Sample flags
|
|
enum SampleFlags
|
|
{
|
|
smp16Bit = 0x01,
|
|
smpLoop = 0x08,
|
|
};
|
|
|
|
char name[32];
|
|
uint32le length;
|
|
uint8le finetune;
|
|
uint8le volume;
|
|
uint32le loopStart;
|
|
uint32le loopEnd;
|
|
uint8le type;
|
|
uint8le loop;
|
|
|
|
// Convert sample header to OpenMPT's internal format.
|
|
void ConvertToMPT(ModSample &mptSmp) const
|
|
{
|
|
mptSmp.Initialize();
|
|
|
|
mptSmp.nLength = length;
|
|
mptSmp.nLoopStart = loopStart;
|
|
mptSmp.nLoopEnd = loopEnd;
|
|
mptSmp.nC5Speed = 8363 * 2;
|
|
mptSmp.nVolume = volume * 16;
|
|
|
|
if(type & smp16Bit)
|
|
{
|
|
mptSmp.nLength /= 2;
|
|
mptSmp.nLoopStart /= 2;
|
|
mptSmp.nLoopEnd /= 2;
|
|
}
|
|
|
|
if((loop & 8) && mptSmp.nLoopEnd > mptSmp.nLoopStart)
|
|
{
|
|
mptSmp.uFlags.set(CHN_LOOP);
|
|
}
|
|
}
|
|
|
|
// Retrieve the internal sample format flags for this sample.
|
|
SampleIO GetSampleFormat() const
|
|
{
|
|
return SampleIO(
|
|
(type & smp16Bit) ? SampleIO::_16bit : SampleIO::_8bit,
|
|
SampleIO::mono,
|
|
SampleIO::littleEndian,
|
|
SampleIO::signedPCM);
|
|
}
|
|
};
|
|
|
|
MPT_BINARY_STRUCT(FARSampleHeader, 48)
|
|
|
|
|
|
static bool ValidateHeader(const FARFileHeader &fileHeader)
|
|
{
|
|
if(std::memcmp(fileHeader.magic, "FAR\xFE", 4) != 0
|
|
|| std::memcmp(fileHeader.eof, "\x0D\x0A\x1A", 3)
|
|
)
|
|
{
|
|
return false;
|
|
}
|
|
if(fileHeader.headerLength < sizeof(FARFileHeader))
|
|
{
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
|
|
static uint64 GetHeaderMinimumAdditionalSize(const FARFileHeader &fileHeader)
|
|
{
|
|
return fileHeader.headerLength - sizeof(FARFileHeader);
|
|
}
|
|
|
|
|
|
CSoundFile::ProbeResult CSoundFile::ProbeFileHeaderFAR(MemoryFileReader file, const uint64 *pfilesize)
|
|
{
|
|
FARFileHeader fileHeader;
|
|
if(!file.ReadStruct(fileHeader))
|
|
{
|
|
return ProbeWantMoreData;
|
|
}
|
|
if(!ValidateHeader(fileHeader))
|
|
{
|
|
return ProbeFailure;
|
|
}
|
|
return ProbeAdditionalSize(file, pfilesize, GetHeaderMinimumAdditionalSize(fileHeader));
|
|
}
|
|
|
|
|
|
bool CSoundFile::ReadFAR(FileReader &file, ModLoadingFlags loadFlags)
|
|
{
|
|
file.Rewind();
|
|
|
|
FARFileHeader 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;
|
|
}
|
|
|
|
// Globals
|
|
InitializeGlobals(MOD_TYPE_FAR);
|
|
m_nChannels = 16;
|
|
m_nSamplePreAmp = 32;
|
|
m_nDefaultSpeed = fileHeader.defaultSpeed;
|
|
m_nDefaultTempo.Set(80);
|
|
m_nDefaultGlobalVolume = MAX_GLOBAL_VOLUME;
|
|
|
|
m_modFormat.formatName = U_("Farandole Composer");
|
|
m_modFormat.type = U_("far");
|
|
m_modFormat.charset = mpt::Charset::CP437;
|
|
|
|
m_songName = mpt::String::ReadBuf(mpt::String::maybeNullTerminated, fileHeader.songName);
|
|
|
|
// Read channel settings
|
|
for(CHANNELINDEX chn = 0; chn < 16; chn++)
|
|
{
|
|
ChnSettings[chn].Reset();
|
|
ChnSettings[chn].dwFlags = fileHeader.onOff[chn] ? ChannelFlags(0) : CHN_MUTE;
|
|
ChnSettings[chn].nPan = ((fileHeader.chnPanning[chn] & 0x0F) << 4) + 8;
|
|
}
|
|
|
|
// Read song message
|
|
if(fileHeader.messageLength != 0)
|
|
{
|
|
m_songMessage.ReadFixedLineLength(file, fileHeader.messageLength, 132, 0); // 132 characters per line... wow. :)
|
|
}
|
|
|
|
// Read orders
|
|
FAROrderHeader orderHeader;
|
|
if(!file.ReadStruct(orderHeader))
|
|
{
|
|
return false;
|
|
}
|
|
ReadOrderFromArray(Order(), orderHeader.orders, orderHeader.numOrders, 0xFF, 0xFE);
|
|
Order().SetRestartPos(orderHeader.restartPos);
|
|
|
|
file.Seek(fileHeader.headerLength);
|
|
|
|
// Pattern effect LUT
|
|
static constexpr EffectCommand farEffects[] =
|
|
{
|
|
CMD_NONE,
|
|
CMD_PORTAMENTOUP,
|
|
CMD_PORTAMENTODOWN,
|
|
CMD_TONEPORTAMENTO,
|
|
CMD_RETRIG,
|
|
CMD_VIBRATO, // depth
|
|
CMD_VIBRATO, // speed
|
|
CMD_VOLUMESLIDE, // up
|
|
CMD_VOLUMESLIDE, // down
|
|
CMD_VIBRATO, // sustained (?)
|
|
CMD_NONE, // actually slide-to-volume
|
|
CMD_S3MCMDEX, // panning
|
|
CMD_S3MCMDEX, // note offset => note delay?
|
|
CMD_NONE, // fine tempo down
|
|
CMD_NONE, // fine tempo up
|
|
CMD_SPEED,
|
|
};
|
|
|
|
// Read patterns
|
|
for(PATTERNINDEX pat = 0; pat < 256; pat++)
|
|
{
|
|
if(!orderHeader.patternSize[pat])
|
|
{
|
|
continue;
|
|
}
|
|
|
|
FileReader patternChunk = file.ReadChunk(orderHeader.patternSize[pat]);
|
|
|
|
// Calculate pattern length in rows (every event is 4 bytes, and we have 16 channels)
|
|
ROWINDEX numRows = (orderHeader.patternSize[pat] - 2) / (16 * 4);
|
|
if(!(loadFlags & loadPatternData) || !Patterns.Insert(pat, numRows))
|
|
{
|
|
continue;
|
|
}
|
|
|
|
// Read break row and unused value (used to be pattern tempo)
|
|
ROWINDEX breakRow = patternChunk.ReadUint8();
|
|
patternChunk.Skip(1);
|
|
if(breakRow > 0 && breakRow < numRows - 2)
|
|
{
|
|
breakRow++;
|
|
} else
|
|
{
|
|
breakRow = ROWINDEX_INVALID;
|
|
}
|
|
|
|
// Read pattern data
|
|
for(ROWINDEX row = 0; row < numRows; row++)
|
|
{
|
|
PatternRow rowBase = Patterns[pat].GetRow(row);
|
|
for(CHANNELINDEX chn = 0; chn < 16; chn++)
|
|
{
|
|
ModCommand &m = rowBase[chn];
|
|
|
|
const auto [note, instr, volume, effect] = patternChunk.ReadArray<uint8, 4>();
|
|
|
|
if(note > 0 && note <= 72)
|
|
{
|
|
m.note = note + 35 + NOTE_MIN;
|
|
m.instr = instr + 1;
|
|
}
|
|
|
|
if(m.note != NOTE_NONE || volume > 0)
|
|
{
|
|
m.volcmd = VOLCMD_VOLUME;
|
|
m.vol = (Clamp(volume, uint8(1), uint8(16)) - 1u) * 4u;
|
|
}
|
|
|
|
m.param = effect & 0x0F;
|
|
|
|
switch(effect >> 4)
|
|
{
|
|
case 0x03: // Porta to note
|
|
m.param <<= 2;
|
|
break;
|
|
case 0x04: // Retrig
|
|
m.param = 6 / (1 + (m.param & 0xf)) + 1; // ugh?
|
|
break;
|
|
case 0x06: // Vibrato speed
|
|
case 0x07: // Volume slide up
|
|
m.param *= 8;
|
|
break;
|
|
case 0x0A: // Volume-portamento (what!)
|
|
m.volcmd = VOLCMD_VOLUME;
|
|
m.vol = (m.param << 2) + 4;
|
|
break;
|
|
case 0x0B: // Panning
|
|
m.param |= 0x80;
|
|
break;
|
|
case 0x0C: // Note offset
|
|
m.param = 6 / (1 + m.param) + 1;
|
|
m.param |= 0x0D;
|
|
}
|
|
m.command = farEffects[effect >> 4];
|
|
}
|
|
}
|
|
|
|
Patterns[pat].WriteEffect(EffectWriter(CMD_PATTERNBREAK, 0).Row(breakRow).RetryNextRow());
|
|
}
|
|
|
|
if(!(loadFlags & loadSampleData))
|
|
{
|
|
return true;
|
|
}
|
|
|
|
// Read samples
|
|
uint8 sampleMap[8]; // Sample usage bitset
|
|
file.ReadArray(sampleMap);
|
|
|
|
for(SAMPLEINDEX smp = 0; smp < 64; smp++)
|
|
{
|
|
if(!(sampleMap[smp >> 3] & (1 << (smp & 7))))
|
|
{
|
|
continue;
|
|
}
|
|
|
|
FARSampleHeader sampleHeader;
|
|
if(!file.ReadStruct(sampleHeader))
|
|
{
|
|
return true;
|
|
}
|
|
|
|
m_nSamples = smp + 1;
|
|
ModSample &sample = Samples[m_nSamples];
|
|
m_szNames[m_nSamples] = mpt::String::ReadBuf(mpt::String::nullTerminated, sampleHeader.name);
|
|
sampleHeader.ConvertToMPT(sample);
|
|
sampleHeader.GetSampleFormat().ReadSample(sample, file);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
|
|
OPENMPT_NAMESPACE_END
|