From 437c2079b7984f4989dbc924cf06d1645fa90d82 Mon Sep 17 00:00:00 2001 From: Aurelien Jacobs Date: Sun, 14 Oct 2007 21:19:40 +0000 Subject: moves fraps huffman decoder to its own file, making it more generic Originally committed as revision 10736 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavcodec/huffman.h | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 libavcodec/huffman.h (limited to 'libavcodec/huffman.h') diff --git a/libavcodec/huffman.h b/libavcodec/huffman.h new file mode 100644 index 0000000000..0474fbafb4 --- /dev/null +++ b/libavcodec/huffman.h @@ -0,0 +1,38 @@ +/** + * @file huffman.h + * huffman tree builder and VLC generator + * Copyright (C) 2007 Aurelien Jacobs + * + * 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 + */ + +#ifndef AVCODEC_HUFFMAN_H +#define AVCODEC_HUFFMAN_H + +#include "avcodec.h" + +typedef struct { + int16_t sym; + int16_t n0; + uint32_t count; +} Node; + +typedef int (*huff_cmp_t)(const void *va, const void *vb); +int ff_huff_build_tree(AVCodecContext *avctx, VLC *vlc, int nb_codes, + Node nodes[2*nb_codes], huff_cmp_t cmp, int hnode_first); + +#endif /* AVCODEC_HUFFMAN_H */ -- cgit v1.2.3