mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
86 lines
2.4 KiB
86 lines
2.4 KiB
/* |
|
* arbitrary precision integers |
|
* Copyright (c) 2004 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 libavutil/integer.h |
|
* arbitrary precision integers |
|
* @author Michael Niedermayer <michaelni@gmx.at> |
|
*/ |
|
|
|
#ifndef AVUTIL_INTEGER_H |
|
#define AVUTIL_INTEGER_H |
|
|
|
#include <stdint.h> |
|
#include "common.h" |
|
|
|
#define AV_INTEGER_SIZE 8 |
|
|
|
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; |
|
|
|
/** |
|
* Returns 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; |
|
|
|
/** |
|
* Returns 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; |
|
|
|
/** |
|
* Returns a % b. |
|
* @param quot a/b will be stored here. |
|
*/ |
|
AVInteger av_mod_i(AVInteger *quot, AVInteger a, AVInteger b); |
|
|
|
/** |
|
* Returns a/b. |
|
*/ |
|
AVInteger av_div_i(AVInteger a, AVInteger b) av_const; |
|
|
|
/** |
|
* Converts the given int64_t to an AVInteger. |
|
*/ |
|
AVInteger av_int2i(int64_t a) av_const; |
|
|
|
/** |
|
* Converts 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; |
|
|
|
#endif /* AVUTIL_INTEGER_H */
|
|
|