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k3b/libk3bdevice/k3bcdtext.cpp

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/*
*
* $Id: k3bcdtext.cpp 619556 2007-01-03 17:38:12Z trueg $
* Copyright (C) 2003-2007 Sebastian Trueg <trueg@k3b.org>
*
* This file is part of the K3b project.
* Copyright (C) 1998-2007 Sebastian Trueg <trueg@k3b.org>
*
* 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 "k3bcdtext.h"
#include "k3bcrc.h"
#include <k3bdebug.h>
#include <tqtextcodec.h>
#include <string.h>
namespace K3bDevice {
struct cdtext_pack {
unsigned char id1;
unsigned char id2;
unsigned char id3;
#ifdef WORDS_BIGENDIAN // __BYTE_ORDER == __BIG_ENDIAN
unsigned char dbcc: 1;
unsigned char blocknum: 3;
unsigned char charpos: 4;
#else
unsigned char charpos: 4;
unsigned char blocknum: 3;
unsigned char dbcc: 1;
#endif
unsigned char data[12];
unsigned char crc[2];
};
/**
* This one is taken from cdrecord
*/
struct text_size_block {
char charcode;
char first_track;
char last_track;
char copyr_flags;
char pack_count[16];
char last_seqnum[8];
char language_codes[8];
};
void debugRawTextPackData( const unsigned char* data, int dataLen )
{
k3bDebug() << endl << " id1 | id2 | id3 | charps | blockn | dbcc | data | crc |" << endl;
cdtext_pack* pack = (cdtext_pack*)data;
for( int i = 0; i < dataLen/18; ++i ) {
TQString s;
s += TQString( " %1 |" ).arg( pack[i].id1, 6, 16 );
s += TQString( " %1 |" ).arg( pack[i].id2, 6 );
s += TQString( " %1 |" ).arg( pack[i].id3, 6 );
s += TQString( " %1 |" ).arg( pack[i].charpos, 6 );
s += TQString( " %1 |" ).arg( pack[i].blocknum, 6 );
s += TQString( " %1 |" ).arg( pack[i].dbcc, 4 );
// char str[12];
// sprintf( str, "%c%c%c%c%c%c%c%c%c%c%c%c",
// pack[i].data[0] == '\0' ? '<27>' : pack[i].data[0],
// pack[i].data[1] == '\0' ? '<27>' : pack[i].data[1],
// pack[i].data[2] == '\0' ? '<27>' : pack[i].data[2],
// pack[i].data[3] == '\0' ? '<27>' : pack[i].data[3],
// pack[i].data[4] == '\0' ? '<27>' : pack[i].data[4],
// pack[i].data[5] == '\0' ? '<27>' : pack[i].data[5],
// pack[i].data[6] == '\0' ? '<27>' : pack[i].data[6],
// pack[i].data[7] == '\0' ? '<27>' : pack[i].data[7],
// pack[i].data[8] == '\0' ? '<27>' : pack[i].data[8],
// pack[i].data[9] == '\0' ? '<27>' : pack[i].data[9],
// pack[i].data[10] == '\0' ? '<27>' : pack[i].data[10],
// pack[i].data[11] == '\0' ? '<27>' : pack[i].data[11] );
// s += TQString( " %1 |" ).arg( "'" + TQCString(str,13) + "'", 14 );
// TQ_UINT16 crc = pack[i].crc[0]<<8|pack[i].crc[1];
// s += TQString( " %1 |" ).arg( crc );
k3bDebug() << s << endl;
}
}
}
K3bDevice::CdText::CdText()
{
}
K3bDevice::CdText::CdText( const K3bDevice::CdText& text )
: TQValueVector<K3bDevice::TrackCdText>( text ),
m_title( text.title() ),
m_performer( text.performer() ),
m_songwriter( text.songwriter() ),
m_composer( text.composer() ),
m_arranger( text.arranger() ),
m_message( text.message() ),
m_discId( text.discId() ),
m_upcEan( text.upcEan() )
{
}
K3bDevice::CdText::CdText( const unsigned char* data, int len )
{
setRawPackData( data, len );
}
K3bDevice::CdText::CdText( const TQByteArray& b )
{
setRawPackData( b );
}
K3bDevice::CdText::CdText( int size )
{
resize( size );
}
void K3bDevice::CdText::clear()
{
TQValueVector<TrackCdText>::clear();
m_title.setLength(0);
m_performer.setLength(0);
m_songwriter.setLength(0);
m_composer.setLength(0);
m_arranger.setLength(0);
m_message.setLength(0);
m_discId.setLength(0);
m_upcEan.setLength(0);
}
void K3bDevice::CdText::setRawPackData( const unsigned char* data, int len )
{
clear();
int r = len%18;
if( r > 0 && r != 4 ) {
k3bDebug() << "(K3bDevice::CdText) invalid cdtext size: " << len << endl;
}
else if( len-r > 0 ) {
debugRawTextPackData( &data[r], len-r );
cdtext_pack* pack = (cdtext_pack*)&data[r];
for( int i = 0; i < (len-r)/18; ++i ) {
if( pack[i].dbcc ) {
k3bDebug() << "(K3bDevice::CdText) Double byte code not supported" << endl;
return;
}
//
// For some reason all crc bits are inverted.
//
pack[i].crc[0] ^= 0xff;
pack[i].crc[1] ^= 0xff;
TQ_UINT16 crc = calcX25( reinterpret_cast<unsigned char*>(&pack[i]), 18 );
pack[i].crc[0] ^= 0xff;
pack[i].crc[1] ^= 0xff;
if( crc != 0x0000 )
k3bDebug() << "(K3bDevice::CdText) CRC invalid!" << endl;
//
// pack.data has a length of 12
//
// id1 tells us the tracknumber of the data (0 for global)
// data may contain multiple \0. In that case after every \0 the track number increases 1
//
char* nullPos = (char*)pack[i].data - 1;
unsigned int trackNo = pack[i].id2;
while( nullPos ) {
if( count() < trackNo )
resize( trackNo );
char* nextNullPos = (char*)::memchr( nullPos+1, '\0', 11 - (nullPos - (char*)pack[i].data) );
TQString txtstr;
if( nextNullPos ) // take all chars up to the next null
txtstr = TQString::fromLatin1( (char*)nullPos+1, nextNullPos - nullPos - 1 );
else // take all chars to the end of the pack data (12 bytes)
txtstr = TQString::fromLatin1( (char*)nullPos+1, 11 - (nullPos - (char*)pack[i].data) );
//
// a tab character means to use the same as for the previous track
//
if( txtstr == "\t" )
txtstr = textForPackType( pack[i].id1, trackNo-1 );
switch( pack[i].id1 ) {
case 0x80: // Title
if( trackNo == 0 )
m_title.append( txtstr );
else
at(trackNo-1).m_title.append( txtstr );
break;
case 0x81: // Performer
if( trackNo == 0 )
m_performer.append( txtstr );
else
at(trackNo-1).m_performer.append( txtstr );
break;
case 0x82: // Writer
if( trackNo == 0 )
m_songwriter.append( txtstr );
else
at(trackNo-1).m_songwriter.append( txtstr );
break;
case 0x83: // Composer
if( trackNo == 0 )
m_composer.append( txtstr );
else
at(trackNo-1).m_composer.append( txtstr );
break;
case 0x84: // Arranger
if( trackNo == 0 )
m_arranger.append( txtstr );
else
at(trackNo-1).m_arranger.append( txtstr );
break;
case 0x85: // Message
if( trackNo == 0 )
m_message.append( txtstr );
else
at(trackNo-1).m_message.append( txtstr );
break;
case 0x86: // Disc identification
// only global
if( trackNo == 0 )
m_discId.append( txtstr );
break;
case 0x8e: // Upc or isrc
if( trackNo == 0 )
m_upcEan.append( txtstr );
else
at(trackNo-1).m_isrc.append( txtstr );
break;
// TODO: support for binary data
// 0x88: TOC
// 0x89: second TOC
// 0x8f: Size information
default:
break;
}
trackNo++;
nullPos = nextNullPos;
}
}
// remove empty fields at the end
unsigned int i = count();
while( i > 0 && at(i-1).isEmpty() )
--i;
resize( i );
}
else
k3bDebug() << "(K3bDevice::CdText) zero-sized CD-TEXT: " << len << endl;
}
void K3bDevice::CdText::setRawPackData( const TQByteArray& b )
{
setRawPackData( reinterpret_cast<const unsigned char*>(b.data()), b.size() );
}
TQByteArray K3bDevice::CdText::rawPackData() const
{
// FIXME: every pack block may only consist of up to 255 packs.
unsigned int pc = 0;
unsigned int alreadyCountedPacks = 0;
//
// prepare the size information block
//
text_size_block tsize;
::memset( &tsize, 0, sizeof(text_size_block) );
tsize.charcode = 0; // ISO 8859-1
tsize.first_track = 1;
tsize.last_track = count();
tsize.pack_count[0xF] = 3;
tsize.language_codes[0] = 0x09; // English (from cdrecord)
//
// create the CD-Text packs
//
TQByteArray data(0);
for( int i = 0; i <= 6; ++i ) {
if( textLengthForPackType( 0x80 | i ) ) {
appendByteArray( data, createPackData( 0x80 | i, pc ) );
tsize.pack_count[i] = pc - alreadyCountedPacks;
alreadyCountedPacks = pc;
}
}
if( textLengthForPackType( 0x8E ) ) {
appendByteArray( data, createPackData( 0x8E, pc ) );
tsize.pack_count[0xE] = pc - alreadyCountedPacks;
alreadyCountedPacks = pc;
}
// pc is the number of the next pack and we add 3 size packs
tsize.last_seqnum[0] = pc + 2;
//
// create the size info packs
//
unsigned int dataFill = data.size();
data.resize( data.size() + 3 * sizeof(cdtext_pack) );
for( int i = 0; i < 3; ++i ) {
cdtext_pack pack;
::memset( &pack, 0, sizeof(cdtext_pack) );
pack.id1 = 0x8F;
pack.id2 = i;
pack.id3 = pc+i;
::memcpy( pack.data, &reinterpret_cast<char*>(&tsize)[i*12], 12 );
savePack( &pack, data, dataFill );
}
//
// add MMC header
//
TQByteArray a( 4 );
a[0] = (data.size()+2)>>8 & 0xff;
a[1] = (data.size()+2) & 0xff;
a[2] = a[3] = 0;
appendByteArray( a, data );
return a;
}
void K3bDevice::CdText::appendByteArray( TQByteArray& a, const TQByteArray& b ) const
{
unsigned int oldSize = a.size();
a.resize( oldSize + b.size() );
::memcpy( &a.data()[oldSize], b.data(), b.size() );
}
// this method also creates completely empty packs
TQByteArray K3bDevice::CdText::createPackData( int packType, unsigned int& packCount ) const
{
TQByteArray data;
unsigned int dataFill = 0;
TQCString text = encodeCdText( textForPackType( packType, 0 ) );
unsigned int currentTrack = 0;
unsigned int textPos = 0;
unsigned int packPos = 0;
//
// initialize the first pack
//
cdtext_pack pack;
::memset( &pack, 0, sizeof(cdtext_pack) );
pack.id1 = packType;
pack.id3 = packCount;
//
// We break this loop when all texts have been packed
//
while( 1 ) {
//
// Copy as many bytes as possible into the pack
//
int copyBytes = TQMIN( 12-packPos, text.length()-textPos );
::memcpy( reinterpret_cast<char*>(&pack.data[packPos]), &text.data()[textPos], copyBytes );
textPos += copyBytes;
packPos += copyBytes;
//
// Check if the packdata is full
//
if( packPos > 11 ) {
savePack( &pack, data, dataFill );
++packCount;
//
// reset the pack
//
::memset( &pack, 0, sizeof(cdtext_pack) );
pack.id1 = packType;
pack.id2 = currentTrack;
pack.id3 = packCount;
packPos = 0;
// update the charpos in case we continue a text in the next pack
if( textPos <= text.length() )
pack.charpos = ( textPos > 15 ? 15 : textPos );
}
//
// Check if we have no text data left
//
if( textPos >= text.length() ) {
// add one zero spacer byte
++packPos;
++currentTrack;
// Check if all texts have been packed
if( currentTrack > count() ) {
savePack( &pack, data, dataFill );
++packCount;
data.resize( dataFill );
return data;
}
// next text block
text = encodeCdText( textForPackType( packType, currentTrack ) );
textPos = 0;
}
}
}
void K3bDevice::CdText::savePack( cdtext_pack* pack, TQByteArray& data, unsigned int& dataFill ) const
{
// create CRC
TQ_UINT16 crc = calcX25( reinterpret_cast<unsigned char*>(pack), sizeof(cdtext_pack)-2 );
// invert for Redbook compliance
crc ^= 0xffff;
pack->crc[0] = (crc>>8) & 0xff;
pack->crc[1] = crc & 0xff;
// append the pack to data
if( data.size() < dataFill + sizeof(cdtext_pack) )
data.resize( dataFill + sizeof(cdtext_pack), TQGArray::SpeedOptim );
::memcpy( &data.data()[dataFill], reinterpret_cast<char*>( pack ), sizeof(cdtext_pack) );
dataFill += sizeof(cdtext_pack);
}
// track 0 means global cdtext
const TQString& K3bDevice::CdText::textForPackType( int packType, unsigned int track ) const
{
switch( packType ) {
default:
case 0x80:
if( track == 0 )
return title();
else
return at(track-1).title();
case 0x81:
if( track == 0 )
return performer();
else
return at(track-1).performer();
case 0x82:
if( track == 0 )
return songwriter();
else
return at(track-1).songwriter();
case 0x83:
if( track == 0 )
return composer();
else
return at(track-1).composer();
case 0x84:
if( track == 0 )
return arranger();
else
return at(track-1).arranger();
case 0x85:
if( track == 0 )
return message();
else
return at(track-1).message();
case 0x86:
if( track == 0 )
return discId();
else
return TQString::null;
// case 0x87:
// if( track == 0 )
// return genre();
// else
// return at(track-1).title();
case 0x8E:
if( track == 0 )
return upcEan();
else
return at(track-1).isrc();
}
}
// count the overall length of a certain packtype texts
unsigned int K3bDevice::CdText::textLengthForPackType( int packType ) const
{
unsigned int len = 0;
for( unsigned int i = 0; i <= count(); ++i )
len += encodeCdText( textForPackType( packType, i ) ).length();
return len;
}
TQCString K3bDevice::encodeCdText( const TQString& s, bool* illegalChars )
{
if( illegalChars )
*illegalChars = false;
// TODO: do this without QT
TQTextCodec* codec = TQTextCodec::codecForName("ISO8859-1");
if( codec ) {
TQCString encoded = codec->fromUnicode( s );
return encoded;
}
else {
TQCString r(s.length()+1);
for( unsigned int i = 0; i < s.length(); ++i ) {
if( s[i].latin1() == 0 ) { // non-ASCII character
r[i] = ' ';
if( illegalChars )
*illegalChars = true;
}
else
r[i] = s[i].latin1();
}
return r;
}
}
bool K3bDevice::CdText::checkCrc( const TQByteArray& rawData )
{
return checkCrc( reinterpret_cast<const unsigned char*>(rawData.data()), rawData.size() );
}
bool K3bDevice::CdText::checkCrc( const unsigned char* data, int len )
{
int r = len%18;
if( r > 0 && r != 4 ) {
k3bDebug() << "(K3bDevice::CdText) invalid cdtext size: " << len << endl;
return false;
}
else {
len -= r;
// TODO: what if the crc field is not used? All zeros?
for( int i = 0; i < (len-r)/18; ++i ) {
cdtext_pack* pack = (cdtext_pack*)&data[r];
//
// For some reason all crc bits are inverted.
//
pack[i].crc[0] ^= 0xff;
pack[i].crc[1] ^= 0xff;
int crc = calcX25( reinterpret_cast<unsigned char*>(&pack[i]), 18 );
pack[i].crc[0] ^= 0xff;
pack[i].crc[1] ^= 0xff;
if( crc != 0x0000 )
return false;
}
return true;
}
}
void K3bDevice::CdText::debug() const
{
// debug the stuff
k3bDebug() << "CD-TEXT data:" << endl
<< "Global:" << endl
<< " Title: '" << title() << "'" << endl
<< " Performer: '" << performer() << "'" << endl
<< " Songwriter: '" << songwriter() << "'" << endl
<< " Composer: '" << composer() << "'" << endl
<< " Arranger: '" << arranger() << "'" << endl
<< " Message: '" << message() << "'" << endl
<< " Disc ID: '" << discId() << "'" << endl
<< " Upc Ean: '" << upcEan() << "'" << endl;
for( unsigned int i = 0; i < count(); ++i ) {
k3bDebug() << "Track " << (i+1) << ":" << endl
<< " Title: '" << at(i).title() << "'" << endl
<< " Performer: '" << at(i).performer() << "'" << endl
<< " Songwriter: '" << at(i).songwriter() << "'" << endl
<< " Composer: '" << at(i).composer() << "'" << endl
<< " Arranger: '" << at(i).arranger() << "'" << endl
<< " Message: '" << at(i).message() << "'" << endl
<< " Isrc: '" << at(i).isrc() << "'" << endl;
}
}
bool K3bDevice::TrackCdText::operator==( const K3bDevice::TrackCdText& other ) const
{
return( m_title == other.m_title &&
m_performer == other.m_performer &&
m_songwriter == other.m_songwriter &&
m_composer == other.m_composer &&
m_arranger == other.m_arranger &&
m_message == other.m_message &&
m_isrc == other.m_isrc );
}
bool K3bDevice::TrackCdText::operator!=( const K3bDevice::TrackCdText& other ) const
{
return !operator==( other );
}
bool K3bDevice::CdText::operator==( const K3bDevice::CdText& other ) const
{
return( m_title == other.m_title &&
m_performer == other.m_performer &&
m_songwriter == other.m_songwriter &&
m_composer == other.m_composer &&
m_arranger == other.m_arranger &&
m_message == other.m_message &&
m_discId == other.m_discId &&
m_upcEan == other.m_upcEan &&
TQValueVector<TrackCdText>::operator==( other ) );
}
bool K3bDevice::CdText::operator!=( const K3bDevice::CdText& other ) const
{
return !operator==( other );
}