PeerStreamer

/*

 * LZW decoder

 * Copyright (c) 2003 Fabrice Bellard

 * Copyright (c) 2006 Konstantin Shishkov

 *

 * This file is part of FFmpeg.

 *

 * FFmpeg 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 2.1 of the License, or (at your option) any later version.

 *

 * FFmpeg 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 FFmpeg; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

 */

/**

 * @file libavcodec/lzw.h

 * @brief LZW decoding routines

 * @author Fabrice Bellard

 * Modified for use in TIFF by Konstantin Shishkov

 */

#ifndef AVCODEC_LZW_H

#define AVCODEC_LZW_H

#include "get_bits.h"

enum FF_LZW_MODES{

    FF_LZW_GIF,

    FF_LZW_TIFF

};

/* clients should not know what LZWState is */

typedef void LZWState;

/* first two functions de/allocate memory for LZWState */

void ff_lzw_decode_open(LZWState **p);

void ff_lzw_decode_close(LZWState **p);

int ff_lzw_decode_init(LZWState *s, int csize, const uint8_t *buf, int buf_size, int mode);

int ff_lzw_decode(LZWState *s, uint8_t *buf, int len);

const uint8_t* ff_lzw_cur_ptr(LZWState *lzw);

void ff_lzw_decode_tail(LZWState *lzw);

/** LZW encode state */

struct LZWEncodeState;

extern const int ff_lzw_encode_state_size;

void ff_lzw_encode_init(struct LZWEncodeState * s, uint8_t * outbuf, int outsize, int maxbits);

int ff_lzw_encode(struct LZWEncodeState * s, const uint8_t * inbuf, int insize);

int ff_lzw_encode_flush(struct LZWEncodeState * s);

#endif /* AVCODEC_LZW_H */