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/*
* Load_pt36.cpp
* -------------
* Purpose: ProTracker 3.6 wrapper format loader
* 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"
OPENMPT_NAMESPACE_BEGIN
struct PT36IffChunk
{
// IFF chunk names
enum ChunkIdentifiers
{
idVERS = MagicBE("VERS"),
idINFO = MagicBE("INFO"),
idCMNT = MagicBE("CMNT"),
idPTDT = MagicBE("PTDT"),
};
uint32be signature; // IFF chunk name
uint32be chunksize; // chunk size without header
};
MPT_BINARY_STRUCT(PT36IffChunk, 8)
struct PT36InfoChunk
{
char name[32];
uint16be numSamples;
uint16be numOrders;
uint16be numPatterns;
uint16be volume;
uint16be tempo;
uint16be flags;
uint16be dateDay;
uint16be dateMonth;
uint16be dateYear;
uint16be dateHour;
uint16be dateMinute;
uint16be dateSecond;
uint16be playtimeHour;
uint16be playtimeMinute;
uint16be playtimeSecond;
uint16be playtimeMsecond;
};
MPT_BINARY_STRUCT(PT36InfoChunk, 64)
struct PT36Header
{
char magicFORM[4]; // "FORM"
uint32be size;
char magicMODL[4]; // "MODL"
bool IsValid() const
{
if(std::memcmp(magicFORM, "FORM", 4))
return false;
if(std::memcmp(magicMODL, "MODL", 4))
return false;
return true;
}
};
MPT_BINARY_STRUCT(PT36Header, 12)
CSoundFile::ProbeResult CSoundFile::ProbeFileHeaderPT36(MemoryFileReader file, const uint64 *pfilesize)
{
PT36Header fileHeader;
if(!file.ReadStruct(fileHeader))
return ProbeWantMoreData;
if(!fileHeader.IsValid())
return ProbeFailure;
MPT_UNREFERENCED_PARAMETER(pfilesize);
return ProbeSuccess;
}
// ProTracker 3.6 version of the MOD format
// Basically just a normal ProTracker mod with different magic, wrapped in an IFF file.
// The "PTDT" chunk is passed to the normal MOD loader.
bool CSoundFile::ReadPT36(FileReader &file, ModLoadingFlags loadFlags)
{
file.Rewind();
PT36Header fileHeader;
if(!file.ReadStruct(fileHeader))
return false;
if(!fileHeader.IsValid())
return false;
bool ok = false, infoOk = false;
FileReader commentChunk;
mpt::ustring version;
PT36InfoChunk info;
MemsetZero(info);
// Go through IFF chunks...
PT36IffChunk iffHead;
if(!file.ReadStruct(iffHead))
{
return false;
}
// First chunk includes "MODL" magic in size
iffHead.chunksize -= 4;
do
{
// All chunk sizes include chunk header
iffHead.chunksize -= 8;
if(loadFlags == onlyVerifyHeader && iffHead.signature == PT36IffChunk::idPTDT)
{
return true;
}
const auto startPos = file.GetPosition();
FileReader chunk = file.ReadChunk(iffHead.chunksize);
if(!chunk.IsValid())
{
break;
}
switch(iffHead.signature)
{
case PT36IffChunk::idVERS:
chunk.Skip(4);
if(chunk.ReadMagic("PT") && iffHead.chunksize > 6)
{
chunk.ReadString<mpt::String::maybeNullTerminated>(version, mpt::Charset::Amiga_no_C1, iffHead.chunksize - 6);
}
break;
case PT36IffChunk::idINFO:
infoOk = chunk.ReadStruct(info);
break;
case PT36IffChunk::idCMNT:
commentChunk = chunk;
break;
case PT36IffChunk::idPTDT:
// Some (all?) PT36 files with samples larger than 64k report incorrect chunk sizes (off by 65536 for each large sample).
// In those broken files, the PTDT chunk is the last chunk in the file anway,
// so we just pass the entire chunk plus the maximum possible extra size to the MOD loader.
// Example: megadream5 by Thunder
{
FileReader moduleChunk = file.GetChunkAt(startPos, iffHead.chunksize + 65536 * 31);
ok = ReadMOD(moduleChunk, loadFlags);
}
break;
}
} while(file.ReadStruct(iffHead));
if(version.empty())
{
version = UL_("3.6");
}
// both an info chunk and a module are required
if(ok && infoOk)
{
bool vblank = (info.flags & 0x100) == 0;
m_playBehaviour.set(kMODVBlankTiming, vblank);
if(info.volume != 0)
m_nSamplePreAmp = std::min(uint16(64), static_cast<uint16>(info.volume));
if(info.tempo != 0 && !vblank)
Order().SetDefaultTempoInt(info.tempo);
if(info.name[0])
m_songName = mpt::String::ReadBuf(mpt::String::maybeNullTerminated, info.name);
if(mpt::is_in_range(info.dateMonth, 1, 12) && mpt::is_in_range(info.dateDay, 1, 31) && mpt::is_in_range(info.dateHour, 0, 23)
&& mpt::is_in_range(info.dateMinute, 0, 59) && mpt::is_in_range(info.dateSecond, 0, 59))
{
#ifdef MODPLUG_TRACKER
m_modFormat.timezone = mpt::Date::LogicalTimezone::Local;
#else
m_modFormat.timezone = mpt::Date::LogicalTimezone::Unspecified;
#endif
FileHistory mptHistory;
mptHistory.loadDate.year = info.dateYear + 1900;
mptHistory.loadDate.month = info.dateMonth;
mptHistory.loadDate.day = info.dateDay;
mptHistory.loadDate.hours = info.dateHour;
mptHistory.loadDate.minutes = info.dateMinute;
mptHistory.loadDate.seconds = info.dateSecond;
m_FileHistory.push_back(mptHistory);
}
}
if(ok)
{
if(commentChunk.IsValid())
{
std::string author;
commentChunk.ReadString<mpt::String::maybeNullTerminated>(author, 32);
if(author != "UNNAMED AUTHOR")
m_songArtist = mpt::ToUnicode(mpt::Charset::Amiga_no_C1, author);
if(!commentChunk.NoBytesLeft())
{
m_songMessage.ReadFixedLineLength(commentChunk, commentChunk.BytesLeft(), 40, 0);
}
}
m_modFormat.madeWithTracker = UL_("ProTracker ") + version;
}
m_SongFlags.set(SONG_PT_MODE);
m_playBehaviour.set(kMODIgnorePanning);
m_playBehaviour.set(kMODOneShotLoops);
m_playBehaviour.reset(kMODSampleSwap);
return ok;
}
OPENMPT_NAMESPACE_END
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