libavutil/mathematics.h File Reference

#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_PHI   1.61803398874989484820
#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 }
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.
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   (1.0/0.0)

Definition at line 57 of file mathematics.h.

Referenced by av_dbl2ext(), codebook_trellis_rate(), encode_window_bands_info(), get_exponent_dynamic(), parse_option(), quantize_and_encode_band(), search_for_ms(), search_for_quantizers_anmr(), search_for_quantizers_faac(), and search_for_quantizers_twoloop().

#define M_E   2.7182818284590452354

Definition at line 30 of file mathematics.h.

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

#define M_LN10   2.30258509299404568402

Definition at line 36 of file mathematics.h.

Referenced by acelp_decode_gain_codef(), calc_input_response(), decode_frame(), ff_acelp_decode_gain_code(), and ff_sipr_decode_frame_16k().

#define M_LN2   0.69314718055994530942

Definition at line 33 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 39 of file mathematics.h.

Referenced by ff_amr_set_fixed_gain().

#define M_PHI   1.61803398874989484820

Definition at line 42 of file mathematics.h.

Referenced by init_pattern_from_string().

#define M_PI   3.14159265358979323846

Definition at line 45 of file mathematics.h.

#define M_SQRT1_2   0.70710678118654752440

Definition at line 48 of file mathematics.h.

Referenced by dca_decode_frame(), dca_filter_channels(), nelly_decode_block(), ps_tableinit(), and swri_rematrix_init().

#define M_SQRT2   1.41421356237309504880

Definition at line 51 of file mathematics.h.

Referenced by ff_adx_calculate_coeffs(), and ps_tableinit().

#define NAN   (0.0/0.0)

Definition at line 54 of file mathematics.h.

Referenced by av_expr_parse_and_eval(), av_ext2dbl(), av_get_double(), av_int2dbl(), av_int2flt(), config_input(), config_props(), end_frame(), eval_expr(), init(), select_frame(), and start_frame().