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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 "s3mfile.h"
#include "tstringlist.h"
#include "tdebug.h"
#include "modfileprivate.h"
using namespace TagLib;
using namespace S3M;
class S3M::File::FilePrivate
{
public:
FilePrivate(AudioProperties::ReadStyle propertiesStyle)
: properties(propertiesStyle)
{
}
Mod::Tag tag;
S3M::Properties properties;
};
S3M::File::File(FileName file, bool readProperties,
AudioProperties::ReadStyle propertiesStyle) :
Mod::FileBase(file),
d(new FilePrivate(propertiesStyle))
{
read(readProperties);
}
S3M::File::File(IOStream *stream, bool readProperties,
AudioProperties::ReadStyle propertiesStyle) :
Mod::FileBase(stream),
d(new FilePrivate(propertiesStyle))
{
read(readProperties);
}
S3M::File::~File()
{
delete d;
}
Mod::Tag *S3M::File::tag() const
{
return &d->tag;
}
S3M::Properties *S3M::File::audioProperties() const
{
return &d->properties;
}
bool S3M::File::save()
{
if(readOnly())
{
debug("S3M::File::save() - Cannot save to a read only file.");
return false;
}
// note: if title starts with "Extended Module: "
// the file would look like an .xm file
seek(0);
writeString(d->tag.title(), 28);
seek(32);
ushort length = 0;
ushort sampleCount = 0;
if(!readU16L(length) || !readU16L(sampleCount))
return false;
seek(28, Current);
int channels = 0;
for(int i = 0; i < 32; ++ i)
{
uchar setting = 0;
if(!readByte(setting))
return false;
// or if(setting >= 128)?
// or channels = i + 1;?
// need a better spec!
if(setting != 0xff) ++ channels;
}
seek(channels, Current);
StringList lines = d->tag.comment().split("\n");
// write comment as sample names:
for(ushort i = 0; i < sampleCount; ++ i)
{
seek(96L + length + ((long)i << 1));
ushort instrumentOffset = 0;
if(!readU16L(instrumentOffset))
return false;
seek(((long)instrumentOffset << 4) + 48);
if(i < lines.size())
writeString(lines[i], 28);
else
writeString(String::null, 28);
}
return true;
}
void S3M::File::read(bool)
{
if(!isOpen())
return;
READ_STRING(d->tag.setTitle, 28);
READ_BYTE_AS(mark);
READ_BYTE_AS(type);
READ_ASSERT(mark == 0x1A && type == 0x10);
seek(32);
READ_U16L_AS(length);
READ_U16L_AS(sampleCount);
d->properties.setTableLength(length);
d->properties.setSampleCount(sampleCount);
READ_U16L(d->properties.setPatternCount);
READ_U16L(d->properties.setFlags);
READ_U16L(d->properties.setVersion);
READ_U16L(d->properties.setSamplesType);
READ_ASSERT(readBlock(4) == "SCRM");
READ_BYTE_AS(baseVolume);
d->properties.setBaseVolume((int)baseVolume << 1);
READ_BYTE(d->properties.setTempo);
READ_BYTE(d->properties.setBpmSpeed);
READ_BYTE_AS(stereo);
d->properties.setStereo((stereo & 0x80) != 0);
READ_BYTE(d->properties.setUltraClick);
READ_BYTE_AS(usePanningValues);
d->properties.setUsePanningValues(usePanningValues == 0xFC);
seek(10, Current);
int channels = 0;
for(int i = 0; i < 32; ++ i)
{
READ_BYTE_AS(setting);
// or if(setting >= 128)?
// or channels = i + 1;?
// need a better spec!
if(setting != 0xff) ++ channels;
}
d->properties.setChannels(channels);
seek(channels, Current);
StringList comment;
for(ushort i = 0; i < sampleCount; ++ i)
{
seek(96L + length + ((long)i << 1));
READ_U16L_AS(instrumentOffset);
seek((long)instrumentOffset << 4);
READ_BYTE_AS(sampleType);
READ_STRING_AS(dosFileName, 13);
READ_U16L_AS(sampleOffset);
READ_U32L_AS(sampleLength);
READ_U32L_AS(repeatStart);
READ_U32L_AS(repeatStop);
READ_BYTE_AS(sampleVolume);
seek(2, Current);
READ_BYTE_AS(sampleFlags);
READ_U32L_AS(baseFrequency);
seek(12, Current);
READ_STRING_AS(sampleName, 28);
comment.append(sampleName);
}
d->tag.setComment(comment.toString("\n"));
d->tag.setTrackerName("ScreamTracker III");
}
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