libavutil/mathematics.h File Reference

#include <stdint.h>
#include <math.h>
#include "attributes.h"
#include "rational.h"
#include "intfloat.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_PHI   1.61803398874989484820
#define M_PI   3.14159265358979323846
#define M_SQRT1_2   0.70710678118654752440
#define M_SQRT2   1.41421356237309504880
#define NAN   av_int2float(0x7fc00000)
#define INFINITY   av_int2float(0x7f800000)

Enumerations

enum  AVRounding {
  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)
 Return the greatest common divisor of a and b.
int64_t av_rescale (int64_t a, int64_t b, int64_t c) av_const
 Rescale 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
 Rescale a 64-bit integer with specified rounding.
int64_t av_rescale_q (int64_t a, AVRational bq, AVRational cq) av_const
 Rescale a 64-bit integer by 2 rational numbers.
int64_t av_rescale_q_rnd (int64_t a, AVRational bq, AVRational cq, enum AVRounding) av_const
 Rescale a 64-bit integer by 2 rational numbers with specified rounding.
int av_compare_ts (int64_t ts_a, AVRational tb_a, int64_t ts_b, AVRational tb_b)
 Compare 2 timestamps each in its own timebases.
int64_t av_compare_mod (uint64_t a, uint64_t b, uint64_t mod)
 Compare 2 integers modulo mod.


Define Documentation

#define INFINITY   av_int2float(0x7f800000)

#define M_E   2.7182818284590452354

Definition at line 31 of file mathematics.h.

Referenced by config(), get_qscale(), and put_image().

#define M_LN10   2.30258509299404568402

#define M_LN2   0.69314718055994530942

Definition at line 34 of file mathematics.h.

Referenced by decode_frame(), encode_block(), encode_init(), and ff_sipr_decode_frame_16k().

#define M_LOG2_10   3.32192809488736234787

Definition at line 40 of file mathematics.h.

Referenced by ff_amr_set_fixed_gain().

#define M_PHI   1.61803398874989484820

Definition at line 43 of file mathematics.h.

Referenced by init_pattern_from_string().

#define M_PI   3.14159265358979323846

#define M_SQRT1_2   0.70710678118654752440

#define M_SQRT2   1.41421356237309504880

#define NAN   av_int2float(0x7fc00000)


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