/* -*- Mode: C++ -*- */
/*
* libopenraw - crwdecompressor.h
*
* Copyright (C) 2007-2016 Hubert Figuiere
*
* This library is free software: you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation, either version 3 of
* the License, or (at your option) any later version.
*
* 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, see
* <http://www.gnu.org/licenses/>.
*/
#ifndef OR_INTERNALS_CRWDECOMPRESS_H_
#define OR_INTERNALS_CRWDECOMPRESS_H_
#include <stddef.h>
#include <stdint.h>
#include "decompressor.hpp"
namespace OpenRaw {
class RawData;
namespace IO {
class Stream;
}
namespace Internals {
class RawContainer;
class CrwDecompressor : public Decompressor {
public:
CrwDecompressor(IO::Stream *stream, RawContainer *container);
virtual ~CrwDecompressor();
/** decompress the bitmapdata and return a new bitmap
* @return the new bitmap decompressed. NULL is failure.
*/
virtual RawDataPtr decompress() override;
void setDecoderTable(uint32_t t) { m_table = t; }
void setOutputDimensions(uint32_t x, uint32_t y) {
m_height = y;
m_width = x;
}
private:
struct decode_t {
decode_t *branch[2];
int leaf;
};
uint32_t getbits(IO::Stream *s, int nbits);
void make_decoder(decode_t *dest, const uint8_t *source, int level);
void init_tables(uint32_t table_idx);
uint32_t m_table;
uint32_t m_height, m_width;
decode_t m_first_decode[32];
decode_t m_second_decode[512];
// for make_decoder
decode_t *m_free; /* Next unused node */
int m_leaf; /* no. of leaves already added */
// for getbits
uint32_t m_bitbuf;
int m_vbits;
};
}
}
#endif