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().
void(*	fft_calc )(struct FFTContext *s, FFTComplex *z)
	Do a complex FFT with the parameters defined in ff_fft_init().
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)
int	fft_permutation
int	mdct_permutation

Detailed Description

Definition at line 62 of file fft.h.

Field Documentation

int FFTContext::nbits

Definition at line 63 of file fft.h.

Referenced by ff_fft_calc_c(), ff_fft_fixed_init_arm(), ff_fft_init(), ff_fft_init_x86(), ff_fft_permute_c(), and fft_perm_avx().

int FFTContext::inverse

Definition at line 64 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 65 of file fft.h.

Referenced by ff_fft_end(), ff_fft_init(), ff_fft_permute_c(), ff_imdct_half_c(), ff_mdct_calc_c(), ff_mdct_calcw_c(), and fft_perm_avx().

FFTComplex* FFTContext::tmp_buf

Definition at line 66 of file fft.h.

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

int FFTContext::mdct_size

Definition at line 67 of file fft.h.

Referenced by ff_mdct_init().

int FFTContext::mdct_bits

Definition at line 68 of file fft.h.

Referenced by ff_aac_sbr_ctx_init(), ff_fft_init_altivec(), 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 70 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 71 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 75 of file fft.h.

Referenced by av_fft_permute(), ff_fft_init(), ff_fft_init_arm(), ff_fft_init_x86(), ff_rdft_calc_c(), imc_imdct256(), and main().

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 80 of file fft.h.

Referenced by av_fft_calc(), ff_fft_fixed_init_arm(), ff_fft_init(), ff_fft_init_altivec(), ff_fft_init_arm(), ff_fft_init_mips(), ff_fft_init_x86(), ff_imdct_half_c(), ff_mdct_calc_c(), ff_mdct_calcw_c(), ff_rdft_calc_c(), imc_imdct256(), and main().

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

Definition at line 81 of file fft.h.

Referenced by ff_fft_init(), ff_fft_init_altivec(), ff_fft_init_arm(), ff_fft_init_mips(), ff_fft_init_x86(), imlt(), imlt_gain(), main(), and wma_decode_block().

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

Definition at line 82 of file fft.h.

Referenced by at1_imdct(), decode_subframe(), do_imdct(), ff_fft_init(), ff_fft_init_altivec(), ff_fft_init_arm(), ff_fft_init_mips(), ff_fft_init_x86(), imdct_and_window(), imdct_and_windowing(), nelly_decode_block(), sbr_qmf_analysis(), sbr_qmf_synthesis(), synth_filter_float(), and vorbis_parse_audio_packet().

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

Definition at line 83 of file fft.h.

Referenced by apply_mdct(), apply_window_and_mdct(), ff_fft_fixed_init_arm(), ff_fft_init(), ff_fft_init_arm(), main(), and windowing_and_mdct_ltp().

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

Definition at line 84 of file fft.h.

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

int FFTContext::fft_permutation

Definition at line 85 of file fft.h.

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

int FFTContext::mdct_permutation

Definition at line 89 of file fft.h.

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

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

• libavcodec/fft.h