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FFmpeg
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FFmpeg
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#include <stdint.h>#include <math.h>#include "attributes.h"#include "rational.h"#include "intfloat.h"Go to the source code of this file.
Macros | |
| #define | M_E 2.7182818284590452354 /* e */ |
| #define | M_LN2 0.69314718055994530942 /* log_e 2 */ |
| #define | M_LN10 2.30258509299404568402 /* log_e 10 */ |
| #define | M_LOG2_10 3.32192809488736234787 /* log_2 10 */ |
| #define | M_PHI 1.61803398874989484820 /* phi / golden ratio */ |
| #define | M_PI 3.14159265358979323846 /* pi */ |
| #define | M_PI_2 1.57079632679489661923 /* pi/2 */ |
| #define | M_SQRT1_2 0.70710678118654752440 /* 1/sqrt(2) */ |
| #define | M_SQRT2 1.41421356237309504880 /* sqrt(2) */ |
| #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, AV_ROUND_PASS_MINMAX = 8192 } |
| Rounding methods. More... | |
Functions | |
| int64_t av_const | av_gcd (int64_t a, int64_t b) |
| Compute the greatest common divisor of two integer operands. More... | |
| int64_t | av_rescale (int64_t a, int64_t b, int64_t c) av_const |
| Rescale a 64-bit integer with rounding to nearest. More... | |
| int64_t | av_rescale_rnd (int64_t a, int64_t b, int64_t c, enum AVRounding rnd) av_const |
| Rescale a 64-bit integer with specified rounding. More... | |
| int64_t | av_rescale_q (int64_t a, AVRational bq, AVRational cq) av_const |
| Rescale a 64-bit integer by 2 rational numbers. More... | |
| int64_t | av_rescale_q_rnd (int64_t a, AVRational bq, AVRational cq, enum AVRounding rnd) av_const |
| Rescale a 64-bit integer by 2 rational numbers with specified rounding. More... | |
| int | av_compare_ts (int64_t ts_a, AVRational tb_a, int64_t ts_b, AVRational tb_b) |
| Compare two timestamps each in its own time base. More... | |
| int64_t | av_compare_mod (uint64_t a, uint64_t b, uint64_t mod) |
| Compare the remainders of two integer operands divided by a common divisor. More... | |
| int64_t | av_rescale_delta (AVRational in_tb, int64_t in_ts, AVRational fs_tb, int duration, int64_t *last, AVRational out_tb) |
| Rescale a timestamp while preserving known durations. More... | |
| int64_t | av_add_stable (AVRational ts_tb, int64_t ts, AVRational inc_tb, int64_t inc) |
| Add a value to a timestamp. More... | |
| #define M_E 2.7182818284590452354 /* e */ |
Definition at line 37 of file mathematics.h.
Referenced by ff_scale_eval_dimensions(), get_qscale(), and qsvscale_config_props().
| #define M_LN2 0.69314718055994530942 /* log_e 2 */ |
Definition at line 40 of file mathematics.h.
Referenced by decode_frame(), and ff_sipr_decode_frame_16k().
| #define M_LN10 2.30258509299404568402 /* log_e 10 */ |
Definition at line 43 of file mathematics.h.
Referenced by acelp_decode_gain_codef(), calc_input_response(), config_input(), config_output(), convert_coeffs(), decode_frame(), ff_acelp_decode_gain_code(), ff_sipr_decode_frame_16k(), load_data(), stereo_position(), and swri_dither_init().
| #define M_LOG2_10 3.32192809488736234787 /* log_2 10 */ |
Definition at line 46 of file mathematics.h.
Referenced by ff_exp10(), and ff_exp10f().
| #define M_PHI 1.61803398874989484820 /* phi / golden ratio */ |
Definition at line 49 of file mathematics.h.
Referenced by ff_scale_eval_dimensions(), init_pattern_from_string(), and qsvscale_config_props().
| #define M_PI 3.14159265358979323846 /* pi */ |
Definition at line 52 of file mathematics.h.
Referenced by audiogen(), av_display_rotation_get(), av_display_rotation_set(), bessel_reinit(), biquad_init_coeffs(), block_angle(), build_basis(), build_filter(), butterworth_bp_filter(), butterworth_init_coeffs(), calc_channel_phases(), calc_input_response(), celt_calc_theta(), celt_exp_rotation(), chebyshev1_bp_filter(), chebyshev2_bp_filter(), color_range(), compute_sat_hue_metrics16(), compute_sat_hue_metrics8(), config_input(), config_output(), decode_init(), decode_init_static(), dequant_lsp10i(), dequant_lsp10r(), dequant_lsp16i(), dequant_lsp16r(), draw_curves(), ebur128_init_filter(), encode_init(), eval_expr(), evrc_decode_init(), factor(), fade_gain(), fadst4_1d(), fadst_1d(), fdct_1d(), ff_acelp_lsf2lspd(), ff_adx_calculate_coeffs(), ff_dct_init(), ff_generate_wave_table(), ff_init_mpadsp_tabs_TMPL(), ff_kbd_window_init(), ff_lpc_calc_ref_coefs_f(), ff_mdct15_init(), ff_mdct_init(), ff_ref_dct_init(), ff_scale_eval_dimensions(), ff_sine_window_init(), ff_sipr_init_16k(), ff_timefilter_new(), fft_ref_init(), fill_samples(), filter_2_1(), filter_5_1_back(), filter_frame(), filter_slice(), filter_stereo(), filter_surround(), freq_gain(), generate_kernel(), generate_window_func(), get_input(), get_lfe(), get_qscale(), hn_lpf(), hz_2_rad(), idct248_ref(), imc_decode_init(), init(), init_cqt(), init_ff_cos_tabs(), init_gaussian_filter(), init_idct(), init_imdct_window(), init_mdct_win(), init_tables(), initFilter(), lfo_get(), lfo_get_value(), lsf_decode_fp(), lspf2lpc(), main(), make_filters_from_proto(), open_audio(), ps_tableinit(), qdm2_fft_generate_tone(), qdm2_fft_tone_synthesizer(), qdmc_init_static_data(), qsvscale_config_props(), read16_fft_bin(), read8_fft_bin(), set_highshelf_rbj(), set_lp_rbj(), sipr_decoder_init(), stabilize_lsps(), stereo_position(), sws_getGaussianVec(), vorbis_floor0_decode(), wavesynth_init(), wma_lsp_to_curve_init(), wmavoice_decode_init(), wmavoice_flush(), and yae_reset().
| #define M_PI_2 1.57079632679489661923 /* pi/2 */ |
Definition at line 55 of file mathematics.h.
Referenced by color_range(), config_input(), factor(), stereo_position(), and update_context().
| #define M_SQRT1_2 0.70710678118654752440 /* 1/sqrt(2) */ |
Definition at line 58 of file mathematics.h.
Referenced by avresample_build_matrix(), celt_haar1(), celt_stereo_ms_decouple(), encode_init(), fdct_1d(), filter_frame_float(), ftx_2d(), init_tables(), nelly_decode_block(), ps_tableinit(), and swr_build_matrix().
| #define M_SQRT2 1.41421356237309504880 /* sqrt(2) */ |
Definition at line 61 of file mathematics.h.
Referenced by avresample_build_matrix(), ff_adx_calculate_coeffs(), ff_timefilter_new(), idct32(), init_pow2table(), mpegaudio_tableinit(), process_anticollapse(), ps_tableinit(), sbr_dequant(), vectorscope16(), and vectorscope8().
| #define NAN av_int2float(0x7fc00000) |
Definition at line 64 of file mathematics.h.
| #define INFINITY av_int2float(0x7f800000) |
Definition at line 67 of file mathematics.h.
1.8.6