fft-test.c File Reference

FFT and MDCT tests. More...

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

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Macros
#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 (FFTSample *output, FFTSample *input, int nbits)
static void	dct_ref (FFTSample *output, FFTSample *input, int nbits)
static FFTSample	frandom (AVLFG *prng)
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.

Macro Definition 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 47 of file fft-test.c.

Referenced by fft_ref().

#define FMT   "%10.6f"

Definition at line 56 of file fft-test.c.

Referenced by check_diff().

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

Definition at line 45 of file fft-test.c.

#define RANGE   1.0

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

Referenced by check_diff(), and frandom().

#define REF_SCALE	(		x,
			bits
	)		(x)

Definition at line 55 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 227 of file fft-test.c.

Function Documentation

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

static

Definition at line 191 of file fft-test.c.

Referenced by main().

static void dct_ref ( FFTSample *  output, FFTSample *  input, int  nbits  )

static

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

Referenced by main().

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

static

Definition at line 86 of file fft-test.c.

Referenced by main().

static void fft_ref_init ( int  nbits, int  inverse  )

static

Definition at line 67 of file fft-test.c.

Referenced by main().

static FFTSample frandom ( AVLFG *  prng )

static

Definition at line 186 of file fft-test.c.

Referenced by main().

static void help ( void  )

static

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

Referenced by main().

static void idct_ref ( FFTSample *  output, FFTSample *  input, int  nbits  )

static

Definition at line 151 of file fft-test.c.

Referenced by main().

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

static

Definition at line 115 of file fft-test.c.

Referenced by main().

int main	(	int	argc,
		char **	argv
	)

Definition at line 238 of file fft-test.c.

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

static

Definition at line 133 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 64 of file fft-test.c.

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

float re

Definition at line 64 of file fft-test.c.

Referenced by decode_ac_coeffs(), decode_block(), decode_block_intra(), decode_block_progressive(), decode_block_refinement(), decode_dc_coeffs(), decode_spectrum_and_dequant(), decode_vlc_codeword(), dirac_get_se_golomb(), dv_decode_ac(), 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().