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Diffstat (limited to 'make/stub_includes/libav/libavutil/rational.h')
-rw-r--r-- | make/stub_includes/libav/libavutil/rational.h | 144 |
1 files changed, 0 insertions, 144 deletions
diff --git a/make/stub_includes/libav/libavutil/rational.h b/make/stub_includes/libav/libavutil/rational.h deleted file mode 100644 index 0ec18ec96..000000000 --- a/make/stub_includes/libav/libavutil/rational.h +++ /dev/null @@ -1,144 +0,0 @@ -/* - * rational numbers - * Copyright (c) 2003 Michael Niedermayer <[email protected]> - * - * This file is part of Libav. - * - * Libav 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. - * - * Libav 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 Libav; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -/** - * @file - * rational numbers - * @author Michael Niedermayer <[email protected]> - */ - -#ifndef AVUTIL_RATIONAL_H -#define AVUTIL_RATIONAL_H - -#include <stdint.h> -#include <limits.h> -#include "attributes.h" - -/** - * @addtogroup lavu_math - * @{ - */ - -/** - * rational number numerator/denominator - */ -typedef struct AVRational{ - int num; ///< numerator - int den; ///< denominator -} AVRational; - -/** - * Compare two rationals. - * @param a first rational - * @param b second rational - * @return 0 if a==b, 1 if a>b, -1 if a<b, and INT_MIN if one of the - * values is of the form 0/0 - */ -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 ^ a.den ^ b.den)>>63)|1; - else if(b.den && a.den) return 0; - else if(a.num && b.num) return (a.num>>31) - (b.num>>31); - else return INT_MIN; -} - -/** - * Convert rational to double. - * @param a rational to convert - * @return (double) a - */ -static inline double av_q2d(AVRational a){ - return a.num / (double) a.den; -} - -/** - * Reduce a fraction. - * This is useful for framerate calculations. - * @param dst_num destination numerator - * @param dst_den destination denominator - * @param num source numerator - * @param den source denominator - * @param max the maximum allowed for dst_num & dst_den - * @return 1 if exact, 0 otherwise - */ -int av_reduce(int *dst_num, int *dst_den, int64_t num, int64_t den, int64_t max); - -/** - * Multiply two rationals. - * @param b first rational - * @param c second rational - * @return b*c - */ -AVRational av_mul_q(AVRational b, AVRational c) av_const; - -/** - * Divide one rational by another. - * @param b first rational - * @param c second rational - * @return b/c - */ -AVRational av_div_q(AVRational b, AVRational c) av_const; - -/** - * Add two rationals. - * @param b first rational - * @param c second rational - * @return b+c - */ -AVRational av_add_q(AVRational b, AVRational c) av_const; - -/** - * Subtract one rational from another. - * @param b first rational - * @param c second rational - * @return b-c - */ -AVRational av_sub_q(AVRational b, AVRational c) av_const; - -/** - * Convert a double precision floating point number to a rational. - * inf is expressed as {1,0} or {-1,0} depending on the sign. - * - * @param d double to convert - * @param max the maximum allowed numerator and denominator - * @return (AVRational) d - */ -AVRational av_d2q(double d, int max) av_const; - -/** - * @return 1 if q1 is nearer to q than q2, -1 if q2 is nearer - * than q1, 0 if they have the same distance. - */ -int av_nearer_q(AVRational q, AVRational q1, AVRational q2); - -/** - * Find the nearest value in q_list to q. - * @param q_list an array of rationals terminated by {0, 0} - * @return the index of the nearest value found in the array - */ -int av_find_nearest_q_idx(AVRational q, const AVRational* q_list); - -/** - * @} - */ - -#endif /* AVUTIL_RATIONAL_H */ |