FFmpeg: libavcodec/fft.h File Reference

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Data Structures | Macros | Typedefs | Enumerations | Functions

fft.h File Reference

#include <stdint.h>
#include "config.h"
#include "libavutil/mem.h"
#include "avfft.h"

Go to the source code of this file.

Data Structures

struct FFTDComplex

struct FFTContext

Macros

#define FFT_FLOAT 1

#define FFT_FIXED_32 0

#define FFT_NAME(x) x

#define COSTABLE_CONST

#define COSTABLE(size) COSTABLE_CONST DECLARE_ALIGNED(32, FFTSample, FFT_NAME(ff_cos_##size))[size/2]

#define ff_init_ff_cos_tabs FFT_NAME(ff_init_ff_cos_tabs)

#define ff_fft_init FFT_NAME(ff_fft_init)

#define ff_fft_end FFT_NAME(ff_fft_end)

#define ff_mdct_init FFT_NAME(ff_mdct_init)

#define ff_mdct_end FFT_NAME(ff_mdct_end)

Typedefs

typedef float FFTDouble

Enumerations

enum fft_permutation_type { FF_FFT_PERM_DEFAULT, FF_FFT_PERM_SWAP_LSBS, FF_FFT_PERM_AVX }

enum mdct_permutation_type { FF_MDCT_PERM_NONE, FF_MDCT_PERM_INTERLEAVE }

Functions

COSTABLE (16)

COSTABLE (32)

COSTABLE (64)

COSTABLE (128)

COSTABLE (256)

COSTABLE (512)

COSTABLE (1024)

COSTABLE (2048)

COSTABLE (4096)

COSTABLE (8192)

COSTABLE (16384)

COSTABLE (32768)

COSTABLE (65536)

COSTABLE_CONST FFTSample *const FFT_NAME (ff_cos_tabs)[17]

void ff_init_ff_cos_tabs (int index)

Initialize the cosine table in ff_cos_tabs[index].

int ff_fft_init (FFTContext *s, int nbits, int inverse)

Set up a complex FFT.

void ff_fft_init_aarch64 (FFTContext *s)

void ff_fft_init_x86 (FFTContext *s)

void ff_fft_init_arm (FFTContext *s)

void ff_fft_init_mips (FFTContext *s)

FFT transform.

void ff_fft_init_ppc (FFTContext *s)

void ff_fft_fixed_init_arm (FFTContext *s)

void ff_fft_end (FFTContext *s)

int ff_mdct_init (FFTContext *s, int nbits, int inverse, double scale)

init MDCT or IMDCT computation.

void ff_mdct_end (FFTContext *s)

Macro Definition Documentation

#define FFT_FLOAT 1

Definition at line 26 of file fft.h.

#define FFT_FIXED_32 0

Definition at line 30 of file fft.h.

#define FFT_NAME ( x ) x

Definition at line 41 of file fft.h.

Referenced by ff_init_ff_cos_tabs(), and fft16().

#define COSTABLE_CONST

Definition at line 118 of file fft.h.

#define COSTABLE ( size ) COSTABLE_CONST DECLARE_ALIGNED(32, FFTSample, FFT_NAME(ff_cos_##size))[size/2]

Definition at line 121 of file fft.h.

#define ff_init_ff_cos_tabs FFT_NAME(ff_init_ff_cos_tabs)

Definition at line 139 of file fft.h.

Referenced by ff_dct_init(), ff_fft_init(), ff_fft_init_mips(), and ff_rdft_init().

#define ff_fft_init FFT_NAME(ff_fft_init)

Definition at line 147 of file fft.h.

Referenced by av_fft_init(), ff_mdct_init(), ff_rdft_init(), imc_decode_init(), main(), and on2avc_decode_init().

#define ff_fft_end FFT_NAME(ff_fft_end)

Definition at line 148 of file fft.h.

Referenced by av_fft_end(), ff_mdct_end(), ff_rdft_end(), imc_decode_close(), imc_decode_init(), main(), and on2avc_decode_close().

#define ff_mdct_init FFT_NAME(ff_mdct_init)

Definition at line 167 of file fft.h.

Referenced by aac_decode_init(), ac3_decode_init(), atrac1_decode_init(), atrac3_decode_init(), atrac3p_decode_init(), create_vorbis_context(), dca_decode_init(), decode_init(), dsp_init(), encode_init(), ff_aac_sbr_ctx_init(), ff_ac3_float_mdct_init(), ff_atrac3p_init_imdct(), init_cook_mlt(), init_mdct_win(), main(), mdct_init(), on2avc_decode_init(), vorbis_parse_id_hdr(), and wma_decode_init().

#define ff_mdct_end FFT_NAME(ff_mdct_end)

Definition at line 168 of file fft.h.

Referenced by aac_decode_close(), aac_encode_end(), ac3_decode_end(), atrac1_decode_end(), atrac3_decode_close(), cook_decode_close(), dca_decode_end(), decode_end(), encode_end(), ff_aac_sbr_ctx_close(), ff_ac3_float_mdct_end(), ff_mdct_init(), ff_twinvq_decode_close(), ff_wma_end(), main(), mdct_end(), on2avc_decode_close(), vorbis_encode_close(), and vorbis_free().

Typedef Documentation

typedef float FFTDouble

Definition at line 43 of file fft.h.

Enumeration Type Documentation

enum fft_permutation_type

Enumerator:: FF_FFT_PERM_DEFAULT

FF_FFT_PERM_SWAP_LSBS

FF_FFT_PERM_AVX

Definition at line 77 of file fft.h.

enum mdct_permutation_type

Enumerator:: FF_MDCT_PERM_NONE

FF_MDCT_PERM_INTERLEAVE

Definition at line 83 of file fft.h.

Function Documentation

COSTABLE ( 16 )

COSTABLE ( 32 )

COSTABLE ( 64 )

COSTABLE ( 128 )

COSTABLE ( 256 )

COSTABLE ( 512 )

COSTABLE ( 1024 )

COSTABLE ( 2048 )

COSTABLE ( 4096 )

COSTABLE ( 8192 )

COSTABLE ( 16384 )

COSTABLE ( 32768 )

COSTABLE ( 65536 )

COSTABLE_CONST FFTSample* const FFT_NAME ( ff_cos_tabs )

void ff_init_ff_cos_tabs ( int index )

Initialize the cosine table in ff_cos_tabs[index].

Parameters: index index in ff_cos_tabs array of the table to initialize

Definition at line 88 of file fft_template.c.

int ff_fft_init ( FFTContext * s,

int nbits,

int inverse

)

Set up a complex FFT.

Parameters: nbits log2 of the length of the input array

inverse if 0 perform the forward transform, if 1 perform the inverse

Definition at line 140 of file fft_template.c.

void ff_fft_init_aarch64 ( FFTContext * s )

Definition at line 33 of file fft_init_aarch64.c.

Referenced by ff_fft_init().

void ff_fft_init_x86 ( FFTContext * s )

Definition at line 25 of file fft_init.c.

Referenced by ff_fft_init().

void ff_fft_init_arm ( FFTContext * s )

Definition at line 39 of file fft_init_arm.c.

Referenced by ff_fft_init().

void ff_fft_init_mips ( FFTContext * s )

FFT transform.

Definition at line 499 of file fft_mips.c.

Referenced by ff_fft_init().

void ff_fft_init_ppc ( FFTContext * s )

Definition at line 152 of file fft_init.c.

Referenced by ff_fft_init().

void ff_fft_fixed_init_arm ( FFTContext * s )

Definition at line 30 of file fft_fixed_init_arm.c.

Referenced by ff_fft_init().

void ff_fft_end ( FFTContext * s )

Definition at line 217 of file fft_template.c.

int ff_mdct_init ( FFTContext * s,

int nbits,

int inverse,

double scale

)

init MDCT or IMDCT computation.

Definition at line 47 of file mdct_template.c.

void ff_mdct_end ( FFTContext * s )

Definition at line 203 of file mdct_template.c.

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