From ffc5430bc30a787ae684549df3afcb7b9dcc86d9 Mon Sep 17 00:00:00 2001 From: Kostya Shishkov Date: Thu, 26 Oct 2006 04:15:48 +0000 Subject: LZW decoder as separate module plus TIFF LZW support Originally committed as revision 6795 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavcodec/lzw.h | 49 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 libavcodec/lzw.h (limited to 'libavcodec/lzw.h') diff --git a/libavcodec/lzw.h b/libavcodec/lzw.h new file mode 100644 index 0000000000..60f115caf7 --- /dev/null +++ b/libavcodec/lzw.h @@ -0,0 +1,49 @@ +/* + * 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 lzw.h + * @brief LZW decoding routines + * @author Fabrice Bellard + * Modified for use in TIFF by Konstantin Shishkov + */ + +#ifndef LZW_H +#define LZW_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, uint8_t *buf, int buf_size, int mode); +int ff_lzw_decode(LZWState *s, uint8_t *buf, int len); +uint8_t* ff_lzw_cur_ptr(LZWState *lzw); +void ff_lzw_decode_tail(LZWState *lzw); + +#endif -- cgit v1.2.3