/* -*- 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