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Diffstat (limited to 'src/libffmpeg/libavutil/rational.h')
-rw-r--r-- | src/libffmpeg/libavutil/rational.h | 71 |
1 files changed, 0 insertions, 71 deletions
diff --git a/src/libffmpeg/libavutil/rational.h b/src/libffmpeg/libavutil/rational.h deleted file mode 100644 index 43fc22114..000000000 --- a/src/libffmpeg/libavutil/rational.h +++ /dev/null @@ -1,71 +0,0 @@ -/* - * Rational numbers - * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at> - * - * 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 rational.h - * Rational numbers. - * @author Michael Niedermayer <michaelni@gmx.at> - */ - -#ifndef RATIONAL_H -#define RATIONAL_H - -/** - * Rational number num/den. - */ -typedef struct AVRational{ - int num; ///< numerator - int den; ///< denominator -} AVRational; - -/** - * returns 0 if a==b, 1 if a>b and -1 if a<b. - */ -static inline int av_cmp_q(AVRational a, AVRational b){ - const int64_t tmp= a.num * (int64_t)b.den - b.num * (int64_t)a.den; - - if(tmp) return (tmp>>63)|1; - else return 0; -} - -/** - * converts the given AVRational to a double. - */ -static inline double av_q2d(AVRational a){ - return a.num / (double) a.den; -} - -/** - * reduce a fraction. - * this is usefull for framerate calculations - * @param max the maximum allowed for dst_nom & dst_den - * @return 1 if exact, 0 otherwise - */ -int av_reduce(int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max); - -AVRational av_mul_q(AVRational b, AVRational c); -AVRational av_div_q(AVRational b, AVRational c); -AVRational av_add_q(AVRational b, AVRational c); -AVRational av_sub_q(AVRational b, AVRational c); -AVRational av_d2q(double d, int max); - -#endif // RATIONAL_H |