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 (131072)
COSTABLE_CONST FFTSample *const	FFT_NAME (ff_cos_tabs)[18]
void	ff_init_ff_cos_tabs (int index)
	Initialize the cosine table in ff_cos_tabs[index]. More...
int	ff_fft_init (FFTContext *s, int nbits, int inverse)
	Set up a complex FFT. More...
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. More...
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. More...
void	ff_mdct_end (FFTContext *s)

Macro Definition Documentation

FFT_FLOAT

#define FFT_FLOAT   1

Definition at line 26 of file fft.h.

FFT_FIXED_32

#define FFT_FIXED_32   0

Definition at line 30 of file fft.h.

FFT_NAME

#define FFT_NAME

(

x

)

x

Definition at line 41 of file fft.h.

COSTABLE_CONST

#define COSTABLE_CONST

Definition at line 119 of file fft.h.

COSTABLE

#define COSTABLE

(

size

)

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

Definition at line 122 of file fft.h.

ff_init_ff_cos_tabs

#define ff_init_ff_cos_tabs   FFT_NAME(ff_init_ff_cos_tabs)

Definition at line 141 of file fft.h.

ff_fft_init

#define ff_fft_init   FFT_NAME(ff_fft_init)

Definition at line 149 of file fft.h.

ff_fft_end

#define ff_fft_end   FFT_NAME(ff_fft_end)

Definition at line 150 of file fft.h.

ff_mdct_init

#define ff_mdct_init   FFT_NAME(ff_mdct_init)

Definition at line 169 of file fft.h.

ff_mdct_end

#define ff_mdct_end   FFT_NAME(ff_mdct_end)

Definition at line 170 of file fft.h.

Typedef Documentation

FFTDouble

typedef float FFTDouble

Definition at line 43 of file fft.h.

Enumeration Type Documentation

fft_permutation_type

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.

mdct_permutation_type

enum mdct_permutation_type

Enumerator
FF_MDCT_PERM_NONE
FF_MDCT_PERM_INTERLEAVE

Definition at line 83 of file fft.h.

Function Documentation

COSTABLE() [1/14]

COSTABLE

(

16

)

COSTABLE() [2/14]

COSTABLE

(

32

)

COSTABLE() [3/14]

COSTABLE

(

64

)

COSTABLE() [4/14]

COSTABLE

(

128

)

COSTABLE() [5/14]

COSTABLE

(

256

)

COSTABLE() [6/14]

COSTABLE

(

512

)

COSTABLE() [7/14]

COSTABLE

(

1024

)

COSTABLE() [8/14]

COSTABLE

(

2048

)

COSTABLE() [9/14]

COSTABLE

(

4096

)

COSTABLE() [10/14]

COSTABLE

(

8192

)

COSTABLE() [11/14]

COSTABLE

(

16384

)

COSTABLE() [12/14]

COSTABLE

(

32768

)

COSTABLE() [13/14]

COSTABLE

(

65536

)

COSTABLE() [14/14]

COSTABLE

(

131072

)

FFT_NAME()

static FFTSample *const FFT_NAME

(

ff_cos_tabs

)

Initial value:

= {
    NULL, NULL, NULL, NULL,
    FFT_NAME(ff_cos_16),
    FFT_NAME(ff_cos_32),
    FFT_NAME(ff_cos_64),
    FFT_NAME(ff_cos_128),
    FFT_NAME(ff_cos_256),
    FFT_NAME(ff_cos_512),
    FFT_NAME(ff_cos_1024),
    FFT_NAME(ff_cos_2048),
    FFT_NAME(ff_cos_4096),
    FFT_NAME(ff_cos_8192),
    FFT_NAME(ff_cos_16384),
    FFT_NAME(ff_cos_32768),
    FFT_NAME(ff_cos_65536),
    FFT_NAME(ff_cos_131072),
}

ff_init_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 158 of file fft_template.c.

Referenced by ff_fft_init().

ff_fft_init()

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 203 of file fft_template.c.

ff_fft_init_aarch64()

void ff_fft_init_aarch64

(

FFTContext *

s

)

Definition at line 36 of file fft_init_aarch64.c.

Referenced by ff_fft_init().

ff_fft_init_x86()

void ff_fft_init_x86

(

FFTContext *

s

)

Definition at line 27 of file fft_init.c.

Referenced by ff_fft_init().

ff_fft_init_arm()

void ff_fft_init_arm

(

FFTContext *

s

)

Definition at line 38 of file fft_init_arm.c.

Referenced by ff_fft_init().

ff_fft_init_mips()

void ff_fft_init_mips

(

FFTContext *

s

)

FFT transform.

Definition at line 501 of file fft_mips.c.

Referenced by ff_fft_init().

ff_fft_init_ppc()

void ff_fft_init_ppc

(

FFTContext *

s

)

Definition at line 151 of file fft_init.c.

Referenced by ff_fft_init().

ff_fft_fixed_init_arm()

void ff_fft_fixed_init_arm

(

FFTContext *

s

)

Definition at line 32 of file fft_fixed_init_arm.c.

Referenced by ff_fft_init().

ff_fft_end()

void ff_fft_end

(

FFTContext *

s

)

Definition at line 324 of file fft_template.c.

ff_mdct_init()

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

init MDCT or IMDCT computation.

Definition at line 48 of file mdct_template.c.

ff_mdct_end()

void ff_mdct_end

(

FFTContext *

s

)

Definition at line 209 of file mdct_template.c.

Referenced by ff_mdct_init().