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/*
*
* $Id: k3bclonetocreader.cpp 619556 2007-01-03 17:38:12Z trueg $
* Copyright (C) 2003 Sebastian Trueg <[email protected]>
*
* This file is part of the K3b project.
* Copyright (C) 1998-2007 Sebastian Trueg <[email protected]>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
* See the file "COPYING" for the exact licensing terms.
*/
#include <config.h>
#include "k3bclonetocreader.h"
#include <k3bdeviceglobals.h>
#include <k3bglobals.h>
#include <qfile.h>
#include <qtextstream.h>
#include <kdebug.h>
class K3bCloneTocReader::Private
{
public:
Private()
: size(0) {
}
K3b::Msf size;
QString tocFile;
};
K3bCloneTocReader::K3bCloneTocReader( const QString& filename )
: K3bImageFileReader()
{
d = new Private;
openFile( filename );
}
K3bCloneTocReader::~K3bCloneTocReader()
{
delete d;
}
const K3b::Msf& K3bCloneTocReader::imageSize() const
{
return d->size;
}
void K3bCloneTocReader::readFile()
{
// first of all we check if we find the image file which contains the data for this toc
// cdrecord always uses this strange file naming:
// somedata
// somedata.toc
// filename should always be the toc file
if( filename().right( 4 ) == ".toc" )
d->tocFile = filename();
else
d->tocFile = filename() + ".toc";
// now get rid of the ".toc" extension
QString imageFileName = d->tocFile.left( d->tocFile.length()-4 );
if( !QFile::exists( imageFileName ) ) {
kdDebug() << "(K3bCloneTocReader) could not find image file " << imageFileName << endl;
return;
}
setImageFilename( imageFileName );
d->size = 0;
QFile f( d->tocFile );
if( f.open( IO_ReadOnly ) ) {
//
// Inspired by clone.c from the cdrecord sources
//
char buffer[2048];
int read = f.readBlock( buffer, 2048 );
f.close();
if( read == 2048 ) {
kdDebug() << "(K3bCloneTocReader) TOC too large." << endl;
return;
}
// the toc starts with a tocheader
struct tocheader {
unsigned char len[2];
unsigned char first; // first session
unsigned char last; // last session
};
struct tocheader* th = (struct tocheader*)buffer;
int dataLen = K3bDevice::from2Byte( th->len ) + 2; // the len field does not include it's own length
if( th->first != 1 ) {
kdDebug() << "(K3bCloneTocReader) first session != 1" << endl;
return;
}
// the following bytes are multiple instances of
struct ftrackdesc {
unsigned char sess_number;
#ifdef WORDS_BIGENDIAN // __BYTE_ORDER == __BIG_ENDIAN
unsigned char adr : 4;
unsigned char control : 4;
#else
unsigned char control : 4;
unsigned char adr : 4;
#endif
unsigned char track;
unsigned char point;
unsigned char amin;
unsigned char asec;
unsigned char aframe;
unsigned char res7;
unsigned char pmin;
unsigned char psec;
unsigned char pframe;
};
for( int i = 4; i < dataLen; i += 11) {
struct ftrackdesc* ft = (struct ftrackdesc*)&buffer[i];
if( ft->sess_number != 1 ) {
kdDebug() << "(K3bCloneTocReader} session number != 1" << endl;
return;
}
// now we check some of the values
if( ft->point >= 0x1 && ft->point <= 0x63 ) {
if( ft->adr == 1 ) {
// check track starttime
if( ft->psec > 60 || ft->pframe > 75 ) {
kdDebug() << "(K3bCloneTocReader) invalid track start: "
<< (int)ft->pmin << "."
<< (int)ft->psec << "."
<< (int)ft->pframe << endl;
return;
}
}
}
else {
switch( ft->point ) {
case 0xa0:
if( ft->adr != 1 ) {
kdDebug() << "(K3bCloneTocReader) adr != 1" << endl;
return;
}
// disk type in psec
if( ft->psec != 0x00 && ft->psec != 0x10 && ft->psec != 0x20 ) {
kdDebug() << "(K3bCloneTocReader) invalid disktype: " << ft->psec << endl;
return;
}
if( ft->pmin != 1 ) {
kdDebug() << "(K3bCloneTocReader) first track number != 1 " << endl;
return;
}
if( ft->pframe != 0x0 ) {
kdDebug() << "(K3bCloneTocReader) found data when there should be 0x0" << endl;
return;
}
break;
case 0xa1:
if( ft->adr != 1 ) {
kdDebug() << "(K3bCloneTocReader) adr != 1" << endl;
return;
}
if( !(ft->pmin >= 1) ) {
kdDebug() << "(K3bCloneTocReader) last track number needs to be >= 1." << endl;
return;
}
if( ft->psec != 0x0 || ft->pframe != 0x0 ) {
kdDebug() << "(K3bCloneTocReader) found data when there should be 0x0" << endl;
return;
}
break;
case 0xa2:
if( ft->adr != 1 ) {
kdDebug() << "(K3bCloneTocReader) adr != 1" << endl;
return;
}
// start of the leadout = size of the image
// substract 2 seconds since in cdrecord other than in K3b lba 0 = msf 2:00
// (the cdrecord way is actually more accurate but we use k3b::Msf for many
// things and it is simpler this way.)
d->size = K3b::Msf( ft->pmin, ft->psec, ft->pframe ) - K3b::Msf( 0, 2, 0 );
// leadout... no check so far...
break;
default:
if( ft->adr != 5 ) {
kdDebug() << "(K3bCloneTocReader) adr != 5" << endl;
return;
}
break;
}
}
}
if( d->size.rawBytes() != K3b::filesize( imageFileName ) ) {
kdDebug() << "(K3bCloneTocReader) image file size invalid." << endl;
return;
}
// ok, could be a cdrecord toc file
setValid(true);
}
else {
kdDebug() << "(K3bCloneTocReader) could not open file " << d->tocFile << endl;
}
}
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