libavutil/libm.h File Reference

Replacements for frequently missing libm functions. More...

#include <math.h>
#include "config.h"
#include "attributes.h"

Go to the source code of this file.

Defines
#define	exp2(x)   exp((x) * 0.693147180559945)
#define	exp2f(x)   ((float)exp2(x))
#define	llrint(x)   ((long long)rint(x))
#define	llrintf(x)   ((long long)rint(x))
#define	log2(x)   (log(x) * 1.44269504088896340736)
#define	log2f(x)   ((float)log2(x))
Functions
static av_always_inline av_const long int	lrint (double x)
static av_always_inline av_const long int	lrintf (float x)
static av_always_inline av_const double	round (double x)
static av_always_inline av_const float	roundf (float x)
static av_always_inline av_const double	trunc (double x)
static av_always_inline av_const float	truncf (float x)

---

Detailed Description

Replacements for frequently missing libm functions.

Definition in file libm.h.

---

Define Documentation

#define exp2

(

x

)

exp((x) * 0.693147180559945)

Definition at line 33 of file libm.h.

#define exp2f

(

x

)

((float)exp2(x))

Definition at line 38 of file libm.h.

Referenced by ff_amr_set_fixed_gain(), and sbr_dequant().

#define llrint

(

x

)

((long long)rint(x))

Definition at line 43 of file libm.h.

Referenced by av_audio_convert(), av_set_number2(), and mpegaudio_tableinit().

#define llrintf

(

x

)

((long long)rint(x))

Definition at line 48 of file libm.h.

Referenced by av_audio_convert().

#define log2

(

x

)

(log(x) * 1.44269504088896340736)

Definition at line 53 of file libm.h.

Referenced by find_best_state().

#define log2f

(

x

)

((float)log2(x))

Definition at line 58 of file libm.h.

Referenced by calc_pe_3gpp(), coef2maxsf(), coef2minsf(), sbr_make_f_derived(), sbr_make_f_master(), search_for_quantizers_anmr(), search_for_quantizers_faac(), search_for_quantizers_fast(), and search_for_quantizers_twoloop().

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Function Documentation

static av_always_inline av_const long int lrint

(

double

x

)

[static]

Definition at line 62 of file libm.h.

Referenced by av_audio_convert(), calc_input_response(), encode_block(), PrecalcCoefs(), and printval().

static av_always_inline av_const long int lrintf

(

float

x

)

[static]

Definition at line 69 of file libm.h.

Referenced by av_audio_convert(), av_resample(), avformat_find_stream_info(), avi_write_header(), biquad_init_coeffs(), build_basis(), build_filter(), config(), do_audio_out(), do_video_out(), ff_faandct(), ff_faandct248(), ff_xvid_rate_control_init(), float_to_fixed24_c(), float_to_int16_one(), init_qexp(), make_bands(), p8idct(), parse_ffconfig(), print_fps(), print_report(), quantize_lpc_coefs(), saturate_output_float(), sbr_make_f_derived(), and sbr_make_f_master().

static av_always_inline av_const double round

(

double

x

)

[static]

Definition at line 76 of file libm.h.

static av_always_inline av_const float roundf

(

float

x

)

[static]

Definition at line 83 of file libm.h.

static av_always_inline av_const double trunc

(

double

x

)

[static]

Definition at line 90 of file libm.h.

Referenced by eval_expr().

static av_always_inline av_const float truncf

(

float

x

)

[static]

Definition at line 97 of file libm.h.

Referenced by amrnb_decode_frame(), and amrwb_decode_frame().