FFmpeg: libavutil/libm.h File Reference

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libavutil

Macros | Functions

libm.h File Reference

Replacements for frequently missing libm functions. More...

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

Go to the source code of this file.

Macros

#define atanf(x) ((float)atan(x))

#define atan2f(y, x) ((float)atan2(y, x))

#define powf(x, y) ((float)pow(x, y))

#define cosf(x) ((float)cos(x))

#define expf(x) ((float)exp(x))

#define exp2(x) exp((x) * 0.693147180559945)

#define exp2f(x) ((float)exp2(x))

#define ldexpf(x, exp) ((float)ldexp(x, exp))

#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))

#define log10f(x) ((float)log10(x))

#define sinf(x) ((float)sin(x))

Functions

static av_always_inline double cbrt (double x)

static av_always_inline float cbrtf (float x)

static av_always_inline
av_const int isinf (float x)

static av_always_inline
av_const int isnan (float x)

static double rint (double x)

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.

Macro Definition Documentation

#define atanf ( x ) ((float)atan(x))

Definition at line 38 of file libm.h.

Referenced by calc_bark(), and ps_tableinit().

#define atan2f ( y,

) ((float)atan2(y, x))

Definition at line 43 of file libm.h.

Referenced by ps_tableinit().

#define powf ( x,

) ((float)pow(x, y))

Definition at line 48 of file libm.h.

Referenced by ac3_tables_init(), calc_input_response(), cbrtf(), decode_cce(), decode_ppc(), ff_atrac_init_gain_compensation(), imc_decode_level_coefficients_raw(), and make_bands().

#define cosf ( x ) ((float)cos(x))

Definition at line 67 of file libm.h.

Referenced by lsf2lsp(), and ps_tableinit().

#define expf ( x ) ((float)exp(x))

Definition at line 72 of file libm.h.

Referenced by decode_init(), and synth_block_fcb_acb().

#define exp2 ( x ) exp((x) * 0.693147180559945)

Definition at line 77 of file libm.h.

Referenced by decode_init_static(), imc_decode_level_coefficients(), MPA_encode_init(), psy_3gpp_init(), and value_string().

#define exp2f ( x ) ((float)exp2(x))

Definition at line 82 of file libm.h.

Referenced by calc_reduction_3gpp(), ff_amr_set_fixed_gain(), and sbr_dequant().

#define ldexpf ( x,

exp

) ((float)ldexp(x, exp))

Definition at line 107 of file libm.h.

Referenced by get_float().

#define llrint ( x ) ((long long)rint(x))

Definition at line 112 of file libm.h.

Referenced by av_audio_convert(), avformat_find_stream_info(), avutil_version(), build_filter(), ff_audio_mix_set_matrix(), set(), and write_number().

#define llrintf ( x ) ((long long)rint(x))

Definition at line 117 of file libm.h.

Referenced by av_audio_convert().

#define log2 ( x ) (log(x) * 1.44269504088896340736)

Definition at line 122 of file libm.h.

Referenced by decode_ppc(), draw_mandelbrot(), filter_frame(), find_best_state(), print_report(), qscale2qlog(), and value_string().

#define log2f ( x ) ((float)log2(x))

Definition at line 127 of file libm.h.

Referenced by bit_allocation(), calc_pe_3gpp(), coef2maxsf(), coef2minsf(), imc_decode_level_coefficients(), imc_decode_level_coefficients_raw(), 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().

#define log10f ( x ) ((float)log10(x))

Definition at line 132 of file libm.h.

Referenced by ff_amr_set_fixed_gain(), and ff_sipr_decode_frame_16k().

#define sinf ( x ) ((float)sin(x))

Definition at line 137 of file libm.h.

Referenced by ff_sine_window_init(), and ps_tableinit().

Function Documentation

static av_always_inline double cbrt ( double x )

static

Definition at line 52 of file libm.h.

Referenced by fade_gain(), and plot_spectrum_column().

static av_always_inline float cbrtf ( float x )

static

Definition at line 59 of file libm.h.

Referenced by decode_spectrum_and_dequant(), and quantize_and_encode_band_cost_template().

static av_always_inline av_const int isinf ( float x )

static

Definition at line 86 of file libm.h.

Referenced by av_dbl2ext(), eval_expr(), and get_exponent_dynamic().

static av_always_inline av_const int isnan ( float x )

static

Definition at line 96 of file libm.h.

Referenced by av_d2q(), av_expr_parse_and_eval(), compute_target_delay(), config_props(), double2int64str(), eval_expr(), event_loop(), filter_frame(), get_qscale(), get_video_frame(), normalize_double(), normalize_xy(), sdl_audio_callback(), select_frame(), sync_clock_to_slave(), synchronize_audio(), and video_refresh().

static double rint ( double x )

inlinestatic

Definition at line 141 of file libm.h.

Referenced by calculate_display_rect(), compute_sin_and_cos(), idct248_ref(), lrint(), lrintf(), plot_spectrum_column(), qscale2qlog(), and swri_noise_shaping_TMPL().

static av_always_inline av_const long int lrint ( double x )

static

Definition at line 148 of file libm.h.

Referenced by av_audio_convert(), calc_input_response(), do_video_out(), encode_block(), ff_audio_mix_set_matrix(), fill_xyztables(), precalc_coefs(), and set().

static av_always_inline av_const long int lrintf ( float x )

static

Definition at line 155 of file libm.h.

static av_always_inline av_const double round ( double x )

static

Definition at line 162 of file libm.h.

Referenced by config_output(), dequant(), encode_init(), ff_merge_channel_layouts(), fill_from_cache(), filter_frame(), normalize_double(), and vpx_init().

static av_always_inline av_const float roundf ( float x )

static

Definition at line 169 of file libm.h.

Referenced by xvid_correct_framerate().

static av_always_inline av_const double trunc ( double x )

static

Definition at line 176 of file libm.h.

Referenced by eval_expr().

static av_always_inline av_const float truncf ( float x )

static

Definition at line 183 of file libm.h.

Referenced by amrnb_decode_frame(), and amrwb_decode_frame().

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