FFTContext Struct Reference

#include <fft.h>

Data Fields
int	nbits
int	inverse
uint16_t *	revtab
FFTComplex *	tmp_buf
int	mdct_size
int	mdct_bits
FFTSample *	tcos
FFTSample *	tsin
void(*	fft_permute )(struct FFTContext *s, FFTComplex *z)
	Do the permutation needed BEFORE calling fft_calc(). More...
void(*	fft_calc )(struct FFTContext *s, FFTComplex *z)
	Do a complex FFT with the parameters defined in ff_fft_init(). More...
void(*	imdct_calc )(struct FFTContext *s, FFTSample *output, const FFTSample *input)
void(*	imdct_half )(struct FFTContext *s, FFTSample *output, const FFTSample *input)
void(*	mdct_calc )(struct FFTContext *s, FFTSample *output, const FFTSample *input)
void(*	mdct_calcw )(struct FFTContext *s, FFTDouble *output, const FFTSample *input)
enum fft_permutation_type	fft_permutation
enum mdct_permutation_type	mdct_permutation
uint32_t *	revtab32

Detailed Description

Definition at line 88 of file fft.h.

Field Documentation

int FFTContext::nbits

Definition at line 89 of file fft.h.

Referenced by ff_fft_fixed_init_arm(), ff_fft_init(), ff_fft_init_x86(), fft_calc_c(), fft_perm_avx(), fft_permute_c(), imdct15_half(), init_pfa_reindex_tabs(), and mdct15().

int FFTContext::inverse

Definition at line 90 of file fft.h.

Referenced by ff_fft_fixed_init_arm(), ff_fft_init(), and fft_perm_avx().

uint16_t* FFTContext::revtab

Definition at line 91 of file fft.h.

Referenced by ff_fft_end(), ff_fft_init(), ff_imdct_half_c(), ff_mdct_calc_c(), ff_mdct_calcw_c(), fft_perm_avx(), fft_permute_c(), imdct15_half(), and mdct15().

FFTComplex* FFTContext::tmp_buf

Definition at line 92 of file fft.h.

Referenced by ff_fft_end(), ff_fft_init(), ff_mdct_calcw_c(), and fft_permute_c().

int FFTContext::mdct_size

Definition at line 93 of file fft.h.

Referenced by ff_mdct_init().

int FFTContext::mdct_bits

Definition at line 94 of file fft.h.

Referenced by ff_fft_init_ppc(), ff_imdct_calc_c(), ff_imdct_half_c(), ff_mdct_calc_c(), ff_mdct_calcw_c(), and ff_mdct_init().

FFTSample* FFTContext::tcos

Definition at line 96 of file fft.h.

Referenced by ff_imdct_half_c(), ff_mdct_calc_c(), ff_mdct_calcw_c(), ff_mdct_end(), and ff_mdct_init().

FFTSample* FFTContext::tsin

Definition at line 97 of file fft.h.

Referenced by ff_imdct_half_c(), ff_mdct_calc_c(), ff_mdct_calcw_c(), and ff_mdct_init().

void(* FFTContext::fft_permute)(struct FFTContext *s, FFTComplex *z)

Do the permutation needed BEFORE calling fft_calc().

Definition at line 101 of file fft.h.

Referenced by av_fft_permute(), decode_frame(), ff_fft_init(), ff_fft_init_aarch64(), ff_fft_init_arm(), ff_fft_init_x86(), fft_permute(), imc_imdct256(), rdft_calc_c(), wtf_end_1024(), and wtf_end_512().

void(* FFTContext::fft_calc)(struct FFTContext *s, FFTComplex *z)

Do a complex FFT with the parameters defined in ff_fft_init().

The input data must be permuted before. No 1.0/sqrt(n) normalization is done.

Definition at line 106 of file fft.h.

Referenced by av_fft_calc(), decode_frame(), ff_fft_fixed_init_arm(), ff_fft_init(), ff_fft_init_aarch64(), ff_fft_init_arm(), ff_fft_init_mips(), ff_fft_init_ppc(), ff_fft_init_x86(), ff_imdct_half_c(), ff_mdct_calc_c(), ff_mdct_calcw_c(), fft_calc(), imc_imdct256(), imdct15_half(), mdct15(), rdft_calc_c(), wtf_end_1024(), and wtf_end_512().

void(* FFTContext::imdct_calc)(struct FFTContext *s, FFTSample *output, const FFTSample *input)

Definition at line 107 of file fft.h.

Referenced by ff_atrac3p_imdct(), ff_fft_init(), ff_fft_init_aarch64(), ff_fft_init_arm(), ff_fft_init_mips(), ff_fft_init_ppc(), ff_fft_init_x86(), imdct_calc(), imlt(), imlt_gain(), transform_channel(), and wma_decode_block().

void(* FFTContext::imdct_half)(struct FFTContext *s, FFTSample *output, const FFTSample *input)

Definition at line 108 of file fft.h.

Referenced by at1_imdct(), decode_subframe(), do_imdct(), ff_atrac3p_ipqf(), ff_fft_init(), ff_fft_init_aarch64(), ff_fft_init_arm(), ff_fft_init_mips(), ff_fft_init_ppc(), ff_fft_init_x86(), imdct_and_window(), imdct_and_windowing(), imdct_and_windowing_eld(), imdct_and_windowing_ld(), imdct_calc(), nelly_decode_block(), on2avc_reconstruct_channel(), on2avc_reconstruct_channel_ext(), sbr_qmf_analysis(), sbr_qmf_synthesis(), synth_filter_float(), synth_filter_float_64(), and vorbis_parse_audio_packet().

void(* FFTContext::mdct_calc)(struct FFTContext *s, FFTSample *output, const FFTSample *input)

Definition at line 109 of file fft.h.

Referenced by aac_encode_frame(), apply_mdct(), apply_window_and_mdct(), calc_power(), ff_fft_fixed_init_arm(), ff_fft_init(), ff_fft_init_aarch64(), ff_fft_init_arm(), mdct_calc(), and windowing_and_mdct_ltp().

void(* FFTContext::mdct_calcw)(struct FFTContext *s, FFTDouble *output, const FFTSample *input)

Definition at line 110 of file fft.h.

Referenced by apply_mdct(), ff_fft_fixed_init_arm(), and ff_fft_init().

enum fft_permutation_type FFTContext::fft_permutation

Definition at line 111 of file fft.h.

Referenced by ff_fft_fixed_init_arm(), ff_fft_init(), and ff_fft_init_x86().

enum mdct_permutation_type FFTContext::mdct_permutation

Definition at line 112 of file fft.h.

Referenced by ff_fft_fixed_init_arm(), ff_fft_init_aarch64(), ff_fft_init_arm(), and ff_mdct_init().

uint32_t* FFTContext::revtab32

Definition at line 113 of file fft.h.

Referenced by ff_fft_end(), ff_fft_init(), and fft_permute_c().

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The documentation for this struct was generated from the following file:

• libavcodec/fft.h