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/*
* Copyright (c) 2005-2006 Cyrille Berger <cberger@cberger.net>
*
* 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.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "kis_tiff_stream.h"
TIFFStreamContigBase::TIFFStreamContigBase( uint8* src, uint16 depth, uint32 lineSize ) : TIFFStreamBase(depth), m_src(src), m_lineSize(lineSize) { restart(); }
void TIFFStreamContigBase::restart()
{
m_srcit = m_src;
m_posinc = 8;
}
void TIFFStreamContigBase::moveToLine(uint32 lineNumber)
{
m_srcit = m_src + lineNumber * m_lineSize;
m_posinc = 8;
}
uint32 TIFFStreamContigBelow16::nextValue()
{
uint8 remain;
uint32 value;
remain = m_depth;
value = 0;
while (remain > 0)
{
uint8 toread;
toread = remain;
if (toread > m_posinc) toread = m_posinc;
remain -= toread;
m_posinc -= toread;
value = (value << toread) | (( (*m_srcit) >> (m_posinc) ) & ( ( 1 << toread ) - 1 ) );
if (m_posinc == 0)
{
m_srcit++;
m_posinc=8;
}
}
return value;
}
uint32 TIFFStreamContigBelow32::nextValue()
{
uint8 remain;
uint32 value;
remain = m_depth;
value = 0;
while (remain > 0)
{
uint8 toread;
toread = remain;
if (toread > m_posinc) toread = m_posinc;
remain -= toread;
m_posinc -= toread;
value = (value) | ( (( (*m_srcit) >> (m_posinc) ) & ( ( 1 << toread ) - 1 ) ) << ( m_depth - 8 - remain ) );
if (m_posinc == 0)
{
m_srcit++;
m_posinc=8;
}
}
return value;
}
uint32 TIFFStreamContigAbove32::nextValue()
{
uint8 remain;
uint32 value;
remain = m_depth;
value = 0;
while (remain > 0)
{
uint8 toread;
toread = remain;
if (toread > m_posinc) toread = m_posinc;
remain -= toread;
m_posinc -= toread;
if(remain < 32 )
{
value = (value) | ( (( (*m_srcit) >> (m_posinc) ) & ( ( 1 << toread ) - 1 ) ) << ( 24 - remain ) );
}
if (m_posinc == 0)
{
m_srcit++;
m_posinc=8;
}
}
return value;
}
TIFFStreamSeperate::TIFFStreamSeperate( uint8** srcs, uint8 nb_samples ,uint16 depth, uint32* lineSize) : TIFFStreamBase(depth), m_nb_samples(nb_samples)
{
streams = new TIFFStreamContigBase*[nb_samples];
if(depth < 16)
{
for(uint8 i = 0; i < m_nb_samples; i++)
{
streams[i] = new TIFFStreamContigBelow16(srcs[i], depth, lineSize[i]);
}
} else if( depth < 32 )
{
for(uint8 i = 0; i < m_nb_samples; i++)
{
streams[i] = new TIFFStreamContigBelow32(srcs[i], depth, lineSize[i]);
}
} else {
for(uint8 i = 0; i < m_nb_samples; i++)
{
streams[i] = new TIFFStreamContigAbove32(srcs[i], depth, lineSize[i]);
}
}
restart();
}
TIFFStreamSeperate::~TIFFStreamSeperate()
{
for(uint8 i = 0; i < m_nb_samples; i++)
{
delete streams[i];
}
delete[] streams;
}
uint32 TIFFStreamSeperate::nextValue()
{
uint32 value = streams[ m_current_sample ]->nextValue();
if( (++m_current_sample) >= m_nb_samples)
m_current_sample = 0;
return value;
}
void TIFFStreamSeperate::restart()
{
m_current_sample = 0;
for(uint8 i = 0; i < m_nb_samples; i++)
{
streams[i]->restart();
}
}
void TIFFStreamSeperate::moveToLine(uint32 lineNumber)
{
for(uint8 i = 0; i < m_nb_samples; i++)
{
streams[i]->moveToLine(lineNumber);
}
}
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