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/*
*
* $Id: k3baudiodatasource.cpp 619556 2007-01-03 17:38:12Z trueg $
* Copyright (C) 2004 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 "k3baudiodatasource.h"
#include "k3baudiotrack.h"
#include "k3baudiodoc.h"
K3bAudioDataSource::K3bAudioDataSource()
: m_track(0),
m_prev(0),
m_next(0)
{
}
K3bAudioDataSource::K3bAudioDataSource( const K3bAudioDataSource& source )
: m_track( 0 ),
m_prev( 0 ),
m_next( 0 ),
m_startOffset( source.m_startOffset ),
m_endOffset( source.m_endOffset )
{
}
K3bAudioDataSource::~K3bAudioDataSource()
{
take();
}
K3bAudioDoc* K3bAudioDataSource::doc() const
{
if( m_track )
return m_track->doc();
else
return 0;
}
K3bAudioDataSource* K3bAudioDataSource::take()
{
// if we do not have a track we are not in any list
if( m_track ) {
if( !m_prev )
m_track->setFirstSource( m_next );
if( m_prev )
m_prev->m_next = m_next;
if( m_next )
m_next->m_prev = m_prev;
m_prev = m_next = 0;
emitChange();
m_track = 0;
}
return this;
}
void K3bAudioDataSource::moveAfter( K3bAudioDataSource* source )
{
// cannot create a list outside a track!
if( !source->track() )
return;
if( source == this )
return;
// remove this from the list
take();
K3bAudioDataSource* oldNext = source->m_next;
// set track as prev
source->m_next = this;
m_prev = source;
// set oldNext as next
if( oldNext )
oldNext->m_prev = this;
m_next = oldNext;
m_track = source->track();
emitChange();
}
void K3bAudioDataSource::moveAhead( K3bAudioDataSource* source )
{
// cannot create a list outside a track!
if( !source->track() )
return;
if( source == this )
return;
// remove this from the list
take();
K3bAudioDataSource* oldPrev = source->m_prev;
// set track as next
m_next = source;
source->m_prev = this;
// set oldPrev as prev
m_prev = oldPrev;
if( oldPrev )
oldPrev->m_next = this;
m_track = source->track();
if( !m_prev )
m_track->setFirstSource( this );
emitChange();
}
void K3bAudioDataSource::emitChange()
{
if( m_track )
m_track->sourceChanged( this );
}
K3bAudioDataSource* K3bAudioDataSource::split( const K3b::Msf& pos )
{
if( pos < length() ) {
K3bAudioDataSource* s = copy();
s->setStartOffset( startOffset() + pos );
s->setEndOffset( endOffset() );
setEndOffset( startOffset() + pos );
s->moveAfter( this );
emitChange();
return s;
}
else
return 0;
}
K3b::Msf K3bAudioDataSource::lastSector() const
{
if( endOffset() > 0 )
return endOffset()-1;
else
return originalLength()-1;
}
K3b::Msf K3bAudioDataSource::length() const
{
if( originalLength() == 0 )
return 0;
else if( lastSector() < m_startOffset )
return 1;
else
return lastSector() - m_startOffset + 1;
}
void K3bAudioDataSource::setStartOffset( const K3b::Msf& msf )
{
m_startOffset = msf;
fixupOffsets();
emitChange();
}
void K3bAudioDataSource::setEndOffset( const K3b::Msf& msf )
{
m_endOffset = msf;
fixupOffsets();
emitChange();
}
void K3bAudioDataSource::fixupOffsets()
{
// no length available yet
if( originalLength() == 0 )
return;
if( startOffset() >= originalLength() ) {
setStartOffset( 0 );
}
if( endOffset() > originalLength() ) {
setEndOffset( 0 ); // whole source
}
if( endOffset() > 0 && endOffset() <= startOffset() ) {
setEndOffset( startOffset() );
}
}
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