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/***************************************************************************
copyright : (C) 2011 by Mathias Panzenböck
email : grosser.meister.morti@gmx.net
***************************************************************************/
/***************************************************************************
* This library is free software; you can redistribute it and/or modify *
* it under the terms of the GNU Lesser General Public License version *
* 2.1 as published by the Free Software Foundation. *
* *
* This library is distributed in the hope that it will be useful, but *
* WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
* Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with this library; if not, write to the Free Software *
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, *
* MA 02110-1301 USA *
***************************************************************************/
#include "tstringlist.h"
#include "itfile.h"
#include "tdebug.h"
#include "modfileprivate.h"
using namespace TagLib;
using namespace IT;
// Just copied this array from some example code.
// I think this might be unneccesarry and only needed if
// you convert IT to XM to keep your mod player more simple.
static const uchar AUTOVIB_IT_TO_XM[] = {0, 3, 1, 4, 2, 0, 0, 0};
class IT::File::FilePrivate
{
public:
FilePrivate(AudioProperties::ReadStyle propertiesStyle)
: tag(), properties(propertiesStyle)
{
}
Mod::Tag tag;
IT::Properties properties;
};
IT::File::File(FileName file, bool readProperties,
AudioProperties::ReadStyle propertiesStyle) :
Mod::FileBase(file),
d(new FilePrivate(propertiesStyle))
{
read(readProperties);
}
IT::File::File(IOStream *stream, bool readProperties,
AudioProperties::ReadStyle propertiesStyle) :
Mod::FileBase(stream),
d(new FilePrivate(propertiesStyle))
{
read(readProperties);
}
IT::File::~File()
{
delete d;
}
Mod::Tag *IT::File::tag() const
{
return &d->tag;
}
IT::Properties *IT::File::audioProperties() const
{
return &d->properties;
}
bool IT::File::save()
{
if(readOnly())
{
debug("IT::File::save() - Cannot save to a read only file.");
return false;
}
seek(4);
writeString(d->tag.title(), 26);
// TODO: write comment as instrument and sample names
return true;
}
void IT::File::read(bool)
{
if(!isOpen())
return;
seek(0);
READ_ASSERT(readBlock(4) == "IMPM");
READ_STRING(d->tag.setTitle, 26);
seek(2, Current);
READ_U16L_AS(length);
READ_U16L_AS(instrumentCount);
READ_U16L_AS(sampleCount);
d->properties.setSampleLength(length);
d->properties.setInstrumentCount(instrumentCount);
d->properties.setSampleCount(sampleCount);
READ_U16L(d->properties.setPatternCount);
READ_U16L(d->properties.setVersion);
READ_U16L(d->properties.setCmwt);
READ_U16L(d->properties.setFlags);
READ_U16L_AS(special);
d->properties.setSpecial(special);
READ_U16L(d->properties.setBaseVolume);
seek(1, Current);
READ_BYTE(d->properties.setTempo);
READ_BYTE(d->properties.setBpmSpeed);
StringList comment;
for(ushort i = 0; i < instrumentCount; ++ i)
{
seek(192L + length + ((long)i << 2));
READ_U32L_AS(instrumentOffset);
seek(instrumentOffset);
ByteVector instrumentMagic = readBlock(4);
// TODO: find out if it can really be both here and not just IMPI
READ_ASSERT(instrumentMagic == "IMPS" || instrumentMagic == "IMPI");
READ_STRING_AS(dosFileName, 13);
seek(15, Current);
READ_STRING_AS(instrumentName, 26);
comment.append(instrumentName);
}
for(ushort i = 0; i < sampleCount; ++ i)
{
seek(192L + length + ((long)instrumentCount << 2) + ((long)i << 2));
READ_U32L_AS(sampleOffset);
seek(sampleOffset);
ByteVector sampleMagic = readBlock(4);
// TODO: find out if it can really be both here and not just IMPS
READ_ASSERT(sampleMagic == "IMPS" || sampleMagic == "IMPI");
READ_STRING_AS(dosFileName, 13);
READ_BYTE_AS(globalVolume);
READ_BYTE_AS(sampleFlags);
READ_BYTE_AS(sampleValume);
READ_STRING_AS(sampleName, 26);
READ_BYTE_AS(sampleCvt);
READ_BYTE_AS(samplePanning);
READ_U32L_AS(sampleLength);
READ_U32L_AS(repeatStart);
READ_U32L_AS(repeatStop);
READ_U32L_AS(c4speed);
READ_U32L_AS(sustainLoopStart);
READ_U32L_AS(sustainLoopEnd);
READ_U32L_AS(sampleDataOffset);
READ_BYTE_AS(vibratoRate);
READ_BYTE_AS(vibratoDepth);
READ_BYTE_AS(vibratoSweep);
READ_BYTE_AS(vibratoType);
if(c4speed == 0)
{
c4speed = 8363;
}
else if(c4speed < 256)
{
c4speed = 256;
}
vibratoDepth = vibratoDepth & 0x7F;
vibratoSweep = (vibratoSweep + 3) >> 2;
vibratoType = AUTOVIB_IT_TO_XM[vibratoType & 0x07];
comment.append(sampleName);
}
d->tag.setComment(comment.toString("\n"));
d->tag.setTrackerName("Impulse Tracker");
}
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