faandct.c File Reference

Floating point AAN DCT. More...

#include "faandct.h"
#include "libavutil/internal.h"
#include "libavutil/libm.h"

Go to the source code of this file.

Macros
#define	B0   1.000000000000000000000000000000000000
#define	B1   0.720959822006947913789091890943021267
#define	B2   0.765366864730179543456919968060797734
#define	B3   0.850430094767256448766702844371412325
#define	B4   1.000000000000000000000000000000000000
#define	B5   1.272758580572833938461007018281767032
#define	B6   1.847759065022573512256366378793576574
#define	B7   3.624509785411551372409941227504289587
#define	A1   M_SQRT1_2
#define	A2   0.54119610014619698435
#define	A5   0.38268343236508977170
#define	A4   1.30656296487637652774

Typedefs
typedef float	FLOAT

Functions
static av_always_inline void	row_fdct (FLOAT temp[64], int16_t *data)
void	ff_faandct (int16_t *data)
void	ff_faandct248 (int16_t *data)

Variables
static const FLOAT	postscale [64]

Detailed Description

Floating point AAN DCT.

Author

Michael Niedermayer micha.nosp@m.elni.nosp@m.@gmx..nosp@m.at

Definition in file faandct.c.

Macro Definition Documentation

B0

#define B0   1.000000000000000000000000000000000000

Definition at line 40 of file faandct.c.

B1

#define B1   0.720959822006947913789091890943021267

Definition at line 41 of file faandct.c.

B2

#define B2   0.765366864730179543456919968060797734

Definition at line 42 of file faandct.c.

B3

#define B3   0.850430094767256448766702844371412325

Definition at line 43 of file faandct.c.

B4

#define B4   1.000000000000000000000000000000000000

Definition at line 44 of file faandct.c.

B5

#define B5   1.272758580572833938461007018281767032

Definition at line 45 of file faandct.c.

B6

#define B6   1.847759065022573512256366378793576574

Definition at line 46 of file faandct.c.

B7

#define B7   3.624509785411551372409941227504289587

Definition at line 47 of file faandct.c.

A1

#define A1   M_SQRT1_2

Definition at line 49 of file faandct.c.

A2

#define A2   0.54119610014619698435

Definition at line 50 of file faandct.c.

A5

#define A5   0.38268343236508977170

Definition at line 51 of file faandct.c.

A4

#define A4   1.30656296487637652774

Definition at line 52 of file faandct.c.

Typedef Documentation

FLOAT

typedef float FLOAT

Definition at line 32 of file faandct.c.

Function Documentation

row_fdct()

static av_always_inline void row_fdct ( FLOAT  temp[64], int16_t *  data  )

static

Definition at line 65 of file faandct.c.

Referenced by ff_faandct(), and ff_faandct248().

ff_faandct()

void ff_faandct

(

int16_t *

data

)

Definition at line 114 of file faandct.c.

Referenced by ff_convert_matrix(), and ff_fdctdsp_init().

ff_faandct248()

void ff_faandct248

(

int16_t *

data

)

Definition at line 168 of file faandct.c.

Referenced by ff_fdctdsp_init().

Variable Documentation

postscale

const FLOAT postscale[64]

static

Initial value:

={
B0*B0, B0*B1, B0*B2, B0*B3, B0*B4, B0*B5, B0*B6, B0*B7,
B1*B0, B1*B1, B1*B2, B1*B3, B1*B4, B1*B5, B1*B6, B1*B7,
B2*B0, B2*B1, B2*B2, B2*B3, B2*B4, B2*B5, B2*B6, B2*B7,
B3*B0, B3*B1, B3*B2, B3*B3, B3*B4, B3*B5, B3*B6, B3*B7,
B4*B0, B4*B1, B4*B2, B4*B3, B4*B4, B4*B5, B4*B6, B4*B7,
B5*B0, B5*B1, B5*B2, B5*B3, B5*B4, B5*B5, B5*B6, B5*B7,
B6*B0, B6*B1, B6*B2, B6*B3, B6*B4, B6*B5, B6*B6, B6*B7,
B7*B0, B7*B1, B7*B2, B7*B3, B7*B4, B7*B5, B7*B6, B7*B7,
}

Definition at line 54 of file faandct.c.

Referenced by check_postscale_slice(), ff_faandct(), ff_faandct248(), filter_postscale(), postscale_c(), and set_params().