#include <stdint.h>
#include <math.h>
#include "attributes.h"
#include "rational.h"
Go to the source code of this file.
Defines | |
#define | M_E 2.7182818284590452354 |
#define | M_LN2 0.69314718055994530942 |
#define | M_LN10 2.30258509299404568402 |
#define | M_LOG2_10 3.32192809488736234787 |
#define | M_PI 3.14159265358979323846 |
#define | M_SQRT1_2 0.70710678118654752440 |
#define | M_SQRT2 1.41421356237309504880 |
#define | NAN (0.0/0.0) |
#define | INFINITY (1.0/0.0) |
Enumerations | |
enum | AVRounding { AV_ROUND_ZERO = 0, AV_ROUND_INF = 1, AV_ROUND_DOWN = 2, AV_ROUND_UP = 3, AV_ROUND_NEAR_INF = 5, AV_ROUND_ZERO = 0, AV_ROUND_INF = 1, AV_ROUND_DOWN = 2, AV_ROUND_UP = 3, AV_ROUND_NEAR_INF = 5 } |
Functions | |
int64_t av_const | av_gcd (int64_t a, int64_t b) |
Returns the greatest common divisor of a and b. | |
int64_t | av_rescale (int64_t a, int64_t b, int64_t c) av_const |
Rescales a 64-bit integer with rounding to nearest. | |
int64_t | av_rescale_rnd (int64_t a, int64_t b, int64_t c, enum AVRounding) av_const |
Rescales a 64-bit integer with specified rounding. | |
int64_t | av_rescale_q (int64_t a, AVRational bq, AVRational cq) av_const |
Rescales a 64-bit integer by 2 rational numbers. | |
int | av_compare_ts (int64_t ts_a, AVRational tb_a, int64_t ts_b, AVRational tb_b) |
Compares 2 timestamps each in its own timebases. |
#define INFINITY (1.0/0.0) |
Definition at line 54 of file mathematics.h.
#define M_E 2.7182818284590452354 |
Definition at line 30 of file mathematics.h.
#define M_LN10 2.30258509299404568402 |
Definition at line 36 of file mathematics.h.
#define M_LN2 0.69314718055994530942 |
Definition at line 33 of file mathematics.h.
#define M_LOG2_10 3.32192809488736234787 |
Definition at line 39 of file mathematics.h.
#define M_PI 3.14159265358979323846 |
Definition at line 42 of file mathematics.h.
#define M_SQRT1_2 0.70710678118654752440 |
Definition at line 45 of file mathematics.h.
#define M_SQRT2 1.41421356237309504880 |
Definition at line 48 of file mathematics.h.
#define NAN (0.0/0.0) |
Definition at line 51 of file mathematics.h.
enum AVRounding |
Definition at line 57 of file mathematics.h.
int av_compare_ts | ( | int64_t | ts_a, | |
AVRational | tb_a, | |||
int64_t | ts_b, | |||
AVRational | tb_b | |||
) |
Compares 2 timestamps each in its own timebases.
The result of the function is undefined if one of the timestamps is outside the int64_t range when represented in the others timebase.
Definition at line 139 of file mathematics.c.
int64_t av_const av_gcd | ( | int64_t | a, | |
int64_t | b | |||
) |
Returns the greatest common divisor of a and b.
If both a and b are 0 or either or both are <0 then behavior is undefined.
Definition at line 72 of file mathematics.c.
int64_t av_rescale | ( | int64_t | a, | |
int64_t | b, | |||
int64_t | c | |||
) | const |
Rescales a 64-bit integer with rounding to nearest.
A simple a*b/c isn't possible as it can overflow.
Definition at line 129 of file mathematics.c.
int64_t av_rescale_q | ( | int64_t | a, | |
AVRational | bq, | |||
AVRational | cq | |||
) | const |
int64_t av_rescale_rnd | ( | int64_t | a, | |
int64_t | b, | |||
int64_t | c, | |||
enum | AVRounding | |||
) | const |
Rescales a 64-bit integer with specified rounding.
A simple a*b/c isn't possible as it can overflow.
Definition at line 77 of file mathematics.c.