libavcodec/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
Defines
#define	CONFIG_FFT_FLOAT   1
#define	FFT_NAME(x)   x
#define	FF_FFT_PERM_DEFAULT   0
#define	FF_FFT_PERM_SWAP_LSBS   1
#define	FF_FFT_PERM_AVX   2
#define	FF_MDCT_PERM_NONE   0
#define	FF_MDCT_PERM_INTERLEAVE   1
#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
typedef struct FFTDComplex	FFTDComplex
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_altivec (FFTContext *s)
void	ff_fft_init_mmx (FFTContext *s)
void	ff_fft_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)

---

Define Documentation

#define CONFIG_FFT_FLOAT   1

Definition at line 26 of file fft.h.

#define COSTABLE

(

size

)

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

Definition at line 100 of file fft.h.

#define COSTABLE_CONST

Definition at line 97 of file fft.h.

#define ff_fft_end   FFT_NAME(ff_fft_end)

Definition at line 127 of file fft.h.

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

#define ff_fft_init   FFT_NAME(ff_fft_init)

Definition at line 126 of file fft.h.

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

#define FF_FFT_PERM_AVX   2

Definition at line 88 of file fft.h.

Referenced by ff_fft_init().

#define FF_FFT_PERM_DEFAULT   0

Definition at line 86 of file fft.h.

#define FF_FFT_PERM_SWAP_LSBS   1

Definition at line 87 of file fft.h.

Referenced by ff_fft_init().

#define ff_init_ff_cos_tabs   FFT_NAME(ff_init_ff_cos_tabs)

Definition at line 118 of file fft.h.

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

#define ff_mdct_end   FFT_NAME(ff_mdct_end)

Definition at line 147 of file fft.h.

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

#define ff_mdct_init   FFT_NAME(ff_mdct_init)

Definition at line 146 of file fft.h.

Referenced by aac_decode_init(), aac_encode_init(), ac3_decode_init(), atrac1_decode_init(), av_mdct_init(), create_vorbis_context(), dca_decode_init(), decode_init(), encode_init(), ff_aac_sbr_ctx_init(), ff_ac3_float_mdct_init(), init_atrac3_transforms(), init_cook_mlt(), init_mdct_win(), main(), mdct_init(), vorbis_parse_id_hdr(), and wma_decode_init().

#define FF_MDCT_PERM_INTERLEAVE   1

Definition at line 91 of file fft.h.

Referenced by ff_mdct_init().

#define FF_MDCT_PERM_NONE   0

Definition at line 90 of file fft.h.

Referenced by ff_mdct_init().

#define FFT_NAME

(

x

)

x

Definition at line 37 of file fft.h.

Referenced by ff_init_ff_cos_tabs(), and fft16().

---

Typedef Documentation

typedef struct FFTDComplex FFTDComplex

typedef float FFTDouble

Definition at line 39 of file fft.h.

---

Function Documentation

COSTABLE

(

16

)

COSTABLE

(

32

)

COSTABLE

(

128

)

COSTABLE

(

2048

)

COSTABLE

(

4096

)

COSTABLE

(

256

)

COSTABLE

(

8192

)

COSTABLE

(

16384

)

COSTABLE

(

64

)

COSTABLE

(

512

)

COSTABLE

(

32768

)

COSTABLE

(

65536

)

COSTABLE

(

1024

)

void ff_fft_end

(

FFTContext *

s

)

Definition at line 202 of file fft.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 134 of file fft.c.

void ff_fft_init_altivec

(

FFTContext *

s

)

Definition at line 140 of file fft_altivec.c.

Referenced by ff_fft_init().

void ff_fft_init_arm

(

FFTContext *

s

)

Definition at line 40 of file fft_init_arm.c.

Referenced by ff_fft_init().

void ff_fft_init_mmx

(

FFTContext *

s

)

Definition at line 24 of file fft.c.

Referenced by ff_fft_init().

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 82 of file fft.c.

void ff_mdct_end

(

FFTContext *

s

)

Definition at line 199 of file mdct.c.

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

init MDCT or IMDCT computation.

Definition at line 43 of file mdct.c.

COSTABLE_CONST FFTSample* const FFT_NAME

(

ff_cos_tabs

)