fft.c File Reference

FFT and MDCT tests. More...

#include "config.h"
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "libavutil/cpu.h"
#include "libavutil/lfg.h"
#include "libavutil/log.h"
#include "libavutil/mathematics.h"
#include "libavutil/time.h"
#include "libavcodec/avfft.h"
#include "libavcodec/dct.h"
#include "libavcodec/rdft.h"
#include "compat/getopt.c"
#include "libavcodec/fft.h"

Go to the source code of this file.

Macros
#define	AVFFT   0
#define	MUL16(a, b)   ((a) * (b))
#define	CMAC(pre, pim, are, aim, bre, bim)
#define	RANGE   16384
#define	REF_SCALE(x, bits)   ((x) / (1 << (bits)))
#define	FMT   "%6d"

Enumerations
enum	tf_transform { TRANSFORM_FFT, TRANSFORM_MDCT, TRANSFORM_RDFT, TRANSFORM_DCT }

Functions
static int	fft_ref_init (int nbits, int inverse)
static void	fft_ref (FFTComplex *tabr, FFTComplex *tab, int nbits)
static FFTSample	frandom (AVLFG *prng)
static int	check_diff (FFTSample *tab1, FFTSample *tab2, int n, double scale)
static void	fft_init (FFTContext **s, int nbits, int inverse)
static void	mdct_init (FFTContext **s, int nbits, int inverse, double scale)
static void	mdct_calc (FFTContext *s, FFTSample *output, const FFTSample *input)
static void	imdct_calc (struct FFTContext *s, FFTSample *output, const FFTSample *input)
static void	fft_permute (FFTContext *s, FFTComplex *z)
static void	fft_calc (FFTContext *s, FFTComplex *z)
static void	mdct_end (FFTContext *s)
static void	fft_end (FFTContext *s)
static void	help (void)
int	main (int argc, char **argv)

Variables
struct {
float   re
float   im
} *	exptab

Detailed Description

FFT and MDCT tests.

Definition in file fft.c.

Macro Definition Documentation

AVFFT

#define AVFFT   0

Definition at line 29 of file fft.c.

MUL16

#define MUL16	(		a,
			b
	)		((a) * (b))

Definition at line 59 of file fft.c.

CMAC

#define CMAC	(		pre,
			pim,
			are,
			aim,
			bre,
			bim
	)

Value:

{                                               \
        pre += (MUL16(are, bre) - MUL16(aim, bim)); \
        pim += (MUL16(are, bim) + MUL16(bre, aim)); \
    }

Definition at line 61 of file fft.c.

Referenced by fft_ref().

RANGE

#define RANGE   16384

Definition at line 76 of file fft.c.

Referenced by check_diff(), and frandom().

REF_SCALE

#define REF_SCALE	(		x,
			bits
	)		((x) / (1 << (bits)))

Definition at line 77 of file fft.c.

Referenced by fft_ref().

FMT

#define FMT   "%6d"

Definition at line 78 of file fft.c.

Referenced by check_diff().

Enumeration Type Documentation

tf_transform

enum tf_transform

Enumerator
TRANSFORM_FFT
TRANSFORM_MDCT
TRANSFORM_RDFT
TRANSFORM_DCT

Definition at line 365 of file fft.c.

Function Documentation

fft_ref_init()

static int fft_ref_init ( int  nbits, int  inverse  )

static

Definition at line 85 of file fft.c.

Referenced by main().

fft_ref()

static void fft_ref ( FFTComplex *  tabr, FFTComplex *  tab, int  nbits  )

static

Definition at line 104 of file fft.c.

Referenced by main().

frandom()

static FFTSample frandom ( AVLFG *  prng )

static

Definition at line 198 of file fft.c.

Referenced by main().

check_diff()

static int check_diff ( FFTSample *  tab1, FFTSample *  tab2, int  n, double  scale  )

static

Definition at line 203 of file fft.c.

Referenced by main().

fft_init()

static void fft_init ( FFTContext **  s, int  nbits, int  inverse  )

inlinestatic

Definition at line 223 of file fft.c.

Referenced by main().

mdct_init()

static void mdct_init ( FFTContext **  s, int  nbits, int  inverse, double  scale  )

inlinestatic

Definition at line 232 of file fft.c.

Referenced by main().

mdct_calc()

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

inlinestatic

Definition at line 241 of file fft.c.

Referenced by main().

imdct_calc()

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

inlinestatic

Definition at line 250 of file fft.c.

Referenced by main().

fft_permute()

static void fft_permute ( FFTContext *  s, FFTComplex *  z  )

inlinestatic

Definition at line 259 of file fft.c.

Referenced by main().

fft_calc()

static void fft_calc ( FFTContext *  s, FFTComplex *  z  )

inlinestatic

Definition at line 268 of file fft.c.

Referenced by main().

mdct_end()

static void mdct_end ( FFTContext *  s )

inlinestatic

Definition at line 277 of file fft.c.

Referenced by main().

fft_end()

static void fft_end ( FFTContext *  s )

inlinestatic

Definition at line 286 of file fft.c.

Referenced by main().

help()

static void help ( void  )

static

Definition at line 351 of file fft.c.

Referenced by main().

main()

int main	(	int	argc,
		char **	argv
	)

Definition at line 376 of file fft.c.

Variable Documentation

re

float re

Definition at line 82 of file fft.c.

Referenced by add_noise(), add_wave(), add_wave0(), cfhd_decode(), complex_divide(), complex_multiply(), decode_422_bitstream(), decode_ac_coeffs(), decode_alpha_block(), decode_bgr_1(), decode_block(), decode_block_intra(), decode_block_progressive(), decode_block_refinement(), decode_dc_coeffs(), decode_dct_block(), decode_gray_bitstream(), decode_plane_bitstream(), decode_spectrum_and_dequant(), decode_vlc_codeword(), dv_decode_ac(), fast_convolute_nonlinear(), ff_fft_end(), ff_imdct_half_c(), ff_mdct_calc_c(), ff_mdct_calcw_c(), ff_mpeg1_decode_block_intra(), ff_msmpeg4_decode_block(), fft15_c(), fft4(), fft8(), filter_frame(), get_bits(), get_bits_le(), get_input(), get_interleaved_se_golomb(), get_interleaved_ue_golomb(), get_level_prefix(), get_output(), get_sbits(), get_se_golomb(), get_ue_golomb(), get_ue_golomb_31(), get_ur_golomb(), get_ur_golomb_jpegls(), get_vlc2(), get_xbits(), get_xbits_le(), h261_decode_block(), h263_decode_block(), headphone_fast_convolute(), imc_imdct256(), mdct15(), mdec_decode_block_intra(), mpeg1_decode_block_inter(), mpeg1_fast_decode_block_inter(), mpeg2_decode_block_intra(), mpeg2_decode_block_non_intra(), mpeg2_fast_decode_block_intra(), mpeg2_fast_decode_block_non_intra(), mpeg4_decode_block(), postrotate_c(), rgb_from_cqt(), show_bits(), skip_bits(), sofalizer_fast_convolute(), webp_get_vlc(), and yuv_from_cqt().

im

float im

Definition at line 82 of file fft.c.

Referenced by add_noise(), add_wave(), add_wave0(), complex_divide(), complex_multiply(), fast_convolute_nonlinear(), ff_fft_end(), ff_imdct_half_c(), ff_mdct_calc_c(), ff_mdct_calcw_c(), fft15_c(), fft4(), fft8(), filter_frame(), get_input(), headphone_fast_convolute(), huf_build_dec_table(), huf_uncompress(), huf_unpack_enc_table(), imc_imdct256(), mdct15(), postrotate_c(), rgb_from_cqt(), sofalizer_fast_convolute(), and yuv_from_cqt().

exptab

struct { ... } * exptab

Referenced by fft_ref(), fft_ref_init(), and main().