libavcodec/fft-test.c File Reference

FFT and MDCT tests. More...

#include "libavutil/mathematics.h"
#include "libavutil/lfg.h"
#include "libavutil/log.h"
#include "fft.h"
#include <math.h>
#include <unistd.h>
#include <sys/time.h>
#include <stdlib.h>
#include <string.h>
#include "dct.h"
#include "rdft.h"

Go to the source code of this file.

Defines
#define	MUL16(a, b)   ((a) * (b))
#define	CMAC(pre, pim, are, aim, bre, bim)
#define	RANGE   1.0
#define	REF_SCALE(x, bits)   (x)
#define	FMT   "%10.6f"
Enumerations
enum	tf_transform { TRANSFORM_FFT, TRANSFORM_MDCT, TRANSFORM_RDFT, TRANSFORM_DCT }
Functions
static void	fft_ref_init (int nbits, int inverse)
static void	fft_ref (FFTComplex *tabr, FFTComplex *tab, int nbits)
static void	imdct_ref (FFTSample *out, FFTSample *in, int nbits)
static void	mdct_ref (FFTSample *output, FFTSample *input, int nbits)
static void	idct_ref (float *output, float *input, int nbits)
static void	dct_ref (float *output, float *input, int nbits)
static FFTSample	frandom (AVLFG *prng)
static int64_t	gettime (void)
static int	check_diff (FFTSample *tab1, FFTSample *tab2, int n, double scale)
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-test.c.

---

Define Documentation

#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 46 of file fft-test.c.

Referenced by fft_ref().

#define FMT   "%10.6f"

Definition at line 55 of file fft-test.c.

Referenced by check_diff().

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

Definition at line 44 of file fft-test.c.

#define RANGE   1.0

Definition at line 53 of file fft-test.c.

Referenced by check_diff(), and frandom().

#define REF_SCALE	(	x,
		bits		)	(x)

Definition at line 54 of file fft-test.c.

Referenced by fft_ref(), imdct_ref(), and mdct_ref().

---

Enumeration Type Documentation

enum tf_transform

Enumerator:

TRANSFORM_FFT
TRANSFORM_MDCT
TRANSFORM_RDFT
TRANSFORM_DCT

Definition at line 234 of file fft-test.c.

---

Function Documentation

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

Definition at line 197 of file fft-test.c.

Referenced by main().

static void dct_ref	(	float *	output,
		float *	input,
		int	nbits
	)			[static]

Definition at line 166 of file fft-test.c.

Referenced by main().

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

Definition at line 85 of file fft-test.c.

Referenced by main().

static void fft_ref_init	(	int	nbits,
		int	inverse
	)			[static]

Definition at line 66 of file fft-test.c.

Referenced by main().

static FFTSample frandom

(

AVLFG *

prng

)

[static]

Definition at line 185 of file fft-test.c.

Referenced by main().

static int64_t gettime

(

void

)

[static]

Definition at line 190 of file fft-test.c.

static void help

(

void

)

[static]

Definition at line 219 of file fft-test.c.

static void idct_ref	(	float *	output,
		float *	input,
		int	nbits
	)			[static]

Definition at line 150 of file fft-test.c.

Referenced by main().

static void imdct_ref	(	FFTSample *	out,
		FFTSample *	in,
		int	nbits
	)			[static]

Definition at line 114 of file fft-test.c.

Referenced by main().

int main	(	int	argc,
		char **	argv
	)

Definition at line 241 of file fft-test.c.

static void mdct_ref	(	FFTSample *	output,
		FFTSample *	input,
		int	nbits
	)			[static]

Definition at line 132 of file fft-test.c.

Referenced by main().

---

Variable Documentation

struct { ... } * exptab

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

float im

Definition at line 63 of file fft-test.c.

Referenced by ff_fft_calc_3dn2(), ff_imdct_half_c(), ff_mdct_calc_c(), ff_mdct_calcw_c(), fft4(), fft8(), and imc_imdct256().

float re

Definition at line 63 of file fft-test.c.

Referenced by decode_block(), decode_block_intra(), decode_block_progressive(), decode_block_refinement(), decode_spectrum_and_dequant(), dirac_get_se_golomb(), dv_decode_ac(), ff_fft_calc_3dn2(), ff_imdct_half_c(), ff_mdct_calc_c(), ff_mdct_calcw_c(), ff_msmpeg4_decode_block(), fft4(), fft8(), get_bits(), get_level_prefix(), get_sbits(), get_se_golomb(), get_ue_golomb(), get_ue_golomb_31(), get_ur_golomb(), get_ur_golomb_jpegls(), get_vlc2(), get_xbits(), imc_imdct256(), mdec_decode_block_intra(), mpeg1_decode_block_inter(), mpeg1_decode_block_intra(), 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(), show_bits(), skip_bits(), svq3_get_se_golomb(), and svq3_get_ue_golomb().