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

#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.

#define COSTABLE_CONST

Definition at line 119 of file fft.h.

#define COSTABLE

(

size

)

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

Definition at line 122 of file fft.h.

#define ff_init_ff_cos_tabs   FFT_NAME(ff_init_ff_cos_tabs)

Definition at line 141 of file fft.h.

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

#define ff_fft_init   FFT_NAME(ff_fft_init)

Definition at line 149 of file fft.h.

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

#define ff_fft_end   FFT_NAME(ff_fft_end)

Definition at line 150 of file fft.h.

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

#define ff_mdct_init   FFT_NAME(ff_mdct_init)

Definition at line 169 of file fft.h.

Referenced by aac_decode_init(), ac3_decode_init(), atrac1_decode_init(), atrac3_decode_init(), atrac3p_decode_init(), checkasm_check_synth_filter(), create_vorbis_context(), decode_init(), dsp_init(), encode_init(), ff_aac_sbr_ctx_init(), ff_ac3_float_mdct_init(), ff_atrac3p_init_imdct(), ff_dca_core_init(), init_cook_mlt(), init_mdct_win(), init_sample_rate(), 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 170 of file fft.h.

Referenced by aac_decode_close(), aac_encode_end(), ac3_decode_end(), atrac1_decode_end(), atrac3_decode_close(), atrac3p_decode_close(), checkasm_check_synth_filter(), cook_decode_close(), decode_end(), encode_end(), ff_aac_sbr_ctx_close(), ff_ac3_float_mdct_end(), ff_dca_core_close(), ff_dca_lbr_close(), ff_twinvq_decode_close(), ff_wma_end(), init_sample_rate(), 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

(

131072

)

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 90 of file fft_template.c.

Referenced by 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 142 of file fft_template.c.

void ff_fft_init_aarch64

(

FFTContext *

s

)

Definition at line 36 of file fft_init_aarch64.c.

Referenced by ff_fft_init().

void ff_fft_init_x86

(

FFTContext *

s

)

Definition at line 27 of file fft_init.c.

Referenced by ff_fft_init().

void ff_fft_init_arm

(

FFTContext *

s

)

Definition at line 38 of file fft_init_arm.c.

Referenced by ff_fft_init().

void ff_fft_init_mips

(

FFTContext *

s

)

FFT transform.

Definition at line 501 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 32 of file fft_fixed_init_arm.c.

Referenced by ff_fft_init().

void ff_fft_end

(

FFTContext *

s

)

Definition at line 239 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 48 of file mdct_template.c.

void ff_mdct_end

(

FFTContext *

s

)

Definition at line 209 of file mdct_template.c.

Referenced by ff_mdct_init().