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>

Go to the source code of this file.

Defines
#define	MUL16(a, b)   ((a) * (b))
#define	CMAC(pre, pim, are, aim, bre, bim)
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 (float *out, float *in, int nbits)
static void	mdct_ref (float *output, float *input, int nbits)
static void	idct_ref (float *output, float *input, int nbits)
static void	dct_ref (float *output, float *input, int nbits)
static float	frandom (AVLFG *prng)
static int64_t	gettime (void)
static void	check_diff (float *tab1, float *tab2, int n, double scale)
static void	help (void)
int	main (int argc, char **argv)
Variables
FFTComplex *	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 42 of file fft-test.c.

Referenced by fft_ref().

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

Definition at line 40 of file fft-test.c.

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Enumeration Type Documentation

enum tf_transform

Enumerator:

TRANSFORM_FFT
TRANSFORM_MDCT
TRANSFORM_RDFT
TRANSFORM_DCT

Definition at line 213 of file fft-test.c.

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Function Documentation

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

Definition at line 179 of file fft-test.c.

Referenced by main().

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

Definition at line 149 of file fft-test.c.

Referenced by main().

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

Definition at line 69 of file fft-test.c.

Referenced by main().

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

Definition at line 50 of file fft-test.c.

Referenced by main().

static float frandom

(

AVLFG *

prng

)

[static]

Definition at line 167 of file fft-test.c.

Referenced by main().

static int64_t gettime

(

void

)

[static]

Definition at line 172 of file fft-test.c.

static void help

(

void

)

[static]

Definition at line 198 of file fft-test.c.

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

Definition at line 133 of file fft-test.c.

Referenced by main().

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

Definition at line 98 of file fft-test.c.

Referenced by main().

int main	(	int	argc,
		char **	argv
	)

Definition at line 220 of file fft-test.c.

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

Definition at line 116 of file fft-test.c.

Referenced by main().

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Variable Documentation

FFTComplex* exptab

Definition at line 48 of file fft-test.c.