| /* | |
| * arbitrary precision integers | |
| * Copyright (c) 2004 Michael Niedermayer <[email protected]> | |
| * | |
| * 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 | |
| * arbitrary precision integers | |
| * @author Michael Niedermayer <[email protected]> | |
| */ | |
| typedef struct AVInteger{ | |
| uint16_t v[AV_INTEGER_SIZE]; | |
| } AVInteger; | |
| AVInteger av_add_i(AVInteger a, AVInteger b) av_const; | |
| AVInteger av_sub_i(AVInteger a, AVInteger b) av_const; | |
| /** | |
| * Return the rounded-down value of the base 2 logarithm of the given | |
| * AVInteger. This is simply the index of the most significant bit | |
| * which is 1, or 0 if all bits are 0. | |
| */ | |
| int av_log2_i(AVInteger a) av_const; | |
| AVInteger av_mul_i(AVInteger a, AVInteger b) av_const; | |
| /** | |
| * Return 0 if a==b, 1 if a>b and -1 if a<b. | |
| */ | |
| int av_cmp_i(AVInteger a, AVInteger b) av_const; | |
| /** | |
| * bitwise shift | |
| * @param s the number of bits by which the value should be shifted right, | |
| may be negative for shifting left | |
| */ | |
| AVInteger av_shr_i(AVInteger a, int s) av_const; | |
| /** | |
| * Return a % b. | |
| * @param quot a/b will be stored here. | |
| */ | |
| AVInteger av_mod_i(AVInteger *quot, AVInteger a, AVInteger b); | |
| /** | |
| * Return a/b. | |
| */ | |
| AVInteger av_div_i(AVInteger a, AVInteger b) av_const; | |
| /** | |
| * Convert the given int64_t to an AVInteger. | |
| */ | |
| AVInteger av_int2i(int64_t a) av_const; | |
| /** | |
| * Convert the given AVInteger to an int64_t. | |
| * If the AVInteger is too large to fit into an int64_t, | |
| * then only the least significant 64 bits will be used. | |
| */ | |
| int64_t av_i2int(AVInteger a) av_const; | |