00001 /* 00002 * copyright (c) 2005 Michael Niedermayer <michaelni@gmx.at> 00003 * 00004 * This file is part of FFmpeg. 00005 * 00006 * FFmpeg is free software; you can redistribute it and/or 00007 * modify it under the terms of the GNU Lesser General Public 00008 * License as published by the Free Software Foundation; either 00009 * version 2.1 of the License, or (at your option) any later version. 00010 * 00011 * FFmpeg is distributed in the hope that it will be useful, 00012 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00014 * Lesser General Public License for more details. 00015 * 00016 * You should have received a copy of the GNU Lesser General Public 00017 * License along with FFmpeg; if not, write to the Free Software 00018 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00019 */ 00020 00021 #ifndef FFMPEG_MATHEMATICS_H 00022 #define FFMPEG_MATHEMATICS_H 00023 00024 #include "rational.h" 00025 00026 enum AVRounding { 00027 AV_ROUND_ZERO = 0, 00028 AV_ROUND_INF = 1, 00029 AV_ROUND_DOWN = 2, 00030 AV_ROUND_UP = 3, 00031 AV_ROUND_NEAR_INF = 5, 00032 }; 00033 00038 int64_t av_rescale(int64_t a, int64_t b, int64_t c); 00039 00044 int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c, enum AVRounding); 00045 00049 int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq); 00050 00051 #endif /* FFMPEG_MATHEMATICS_H */