yading@10: /*
yading@10:  * LZW decoder
yading@10:  * Copyright (c) 2003 Fabrice Bellard
yading@10:  * Copyright (c) 2006 Konstantin Shishkov
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: /**
yading@10:  * @file
yading@10:  * @brief LZW decoding routines
yading@10:  * @author Fabrice Bellard
yading@10:  * @author modified for use in TIFF by Konstantin Shishkov
yading@10:  */
yading@10: 
yading@10: #ifndef AVCODEC_LZW_H
yading@10: #define AVCODEC_LZW_H
yading@10: 
yading@10: #include <stdint.h>
yading@10: 
yading@10: struct PutBitContext;
yading@10: 
yading@10: enum FF_LZW_MODES{
yading@10:     FF_LZW_GIF,
yading@10:     FF_LZW_TIFF
yading@10: };
yading@10: 
yading@10: /* clients should not know what LZWState is */
yading@10: typedef void LZWState;
yading@10: 
yading@10: /* first two functions de/allocate memory for LZWState */
yading@10: void ff_lzw_decode_open(LZWState **p);
yading@10: void ff_lzw_decode_close(LZWState **p);
yading@10: int ff_lzw_decode_init(LZWState *s, int csize, const uint8_t *buf, int buf_size, int mode);
yading@10: int ff_lzw_decode(LZWState *s, uint8_t *buf, int len);
yading@10: void ff_lzw_decode_tail(LZWState *lzw);
yading@10: 
yading@10: /** LZW encode state */
yading@10: struct LZWEncodeState;
yading@10: extern const int ff_lzw_encode_state_size;
yading@10: 
yading@10: void ff_lzw_encode_init(struct LZWEncodeState *s, uint8_t *outbuf, int outsize,
yading@10:                         int maxbits, enum FF_LZW_MODES mode,
yading@10:                         void (*lzw_put_bits)(struct PutBitContext *, int, unsigned int));
yading@10: int ff_lzw_encode(struct LZWEncodeState * s, const uint8_t * inbuf, int insize);
yading@10: int ff_lzw_encode_flush(struct LZWEncodeState *s,
yading@10:                         void (*lzw_flush_put_bits)(struct PutBitContext *));
yading@10: 
yading@10: #endif /* AVCODEC_LZW_H */