jfdctfst.c File Reference

Independent JPEG Group's fast AAN dct. More...

#include <stdint.h>
#include "libavutil/attributes.h"
#include "fdctdsp.h"

Go to the source code of this file.

Macros
#define	DCTSIZE   8
#define	GLOBAL(x)
#define	RIGHT_SHIFT(x, n)
#define	CONST_BITS   8
#define	FIX_0_382683433   FIX(0.382683433)
#define	FIX_0_541196100   FIX(0.541196100)
#define	FIX_0_707106781   FIX(0.707106781)
#define	FIX_1_306562965   FIX(1.306562965)
#define	DESCALE(x, n)
#define	MULTIPLY(var, const)

Functions
static av_always_inline void	row_fdct (int16_t *data)
	ff_fdct_ifast (int16_t *data)
	ff_fdct_ifast248 (int16_t *data)

Variables
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Detailed Description

Independent JPEG Group's fast AAN dct.

Definition in file jfdctfst.c.

Macro Definition Documentation

DCTSIZE

#define DCTSIZE   8

Definition at line 73 of file jfdctfst.c.

Referenced by ff_column_fidct_c(), ff_fdct248_islow(), ff_fdct_ifast(), ff_fdct_ifast248(), ff_j_rev_dct(), ff_j_rev_dct4(), ff_jpeg_fdct_islow(), ff_row_fdct_c(), ff_row_idct_c(), init_slice_data_pipeline(), row_fdct(), and row_fdct().

GLOBAL

#define GLOBAL

(

x

)

Value:

x

Definition at line 74 of file jfdctfst.c.

RIGHT_SHIFT

#define RIGHT_SHIFT	(		x,
			n )

Value:

((x) >> (n))

Definition at line 75 of file jfdctfst.c.

CONST_BITS

#define CONST_BITS   8

Definition at line 104 of file jfdctfst.c.

Referenced by ff_fdct248_islow(), ff_j_rev_dct(), ff_j_rev_dct4(), ff_jpeg_fdct_islow(), and row_fdct().

FIX_0_382683433

#define FIX_0_382683433   FIX(0.382683433)

Definition at line 120 of file jfdctfst.c.

Referenced by ff_column_fidct_c(), ff_fdct_ifast(), ff_row_fdct_c(), and row_fdct().

FIX_0_541196100

#define FIX_0_541196100   FIX(0.541196100)

Definition at line 121 of file jfdctfst.c.

Referenced by ff_column_fidct_c(), ff_fdct248_islow(), ff_fdct_ifast(), ff_j_rev_dct(), ff_j_rev_dct4(), ff_jpeg_fdct_islow(), ff_row_fdct_c(), row_fdct(), and row_fdct().

FIX_0_707106781

#define FIX_0_707106781   FIX(0.707106781)

Definition at line 122 of file jfdctfst.c.

Referenced by ff_column_fidct_c(), ff_fdct_ifast(), ff_fdct_ifast248(), ff_row_fdct_c(), and row_fdct().

FIX_1_306562965

#define FIX_1_306562965   FIX(1.306562965)

Definition at line 123 of file jfdctfst.c.

Referenced by ff_column_fidct_c(), ff_fdct_ifast(), ff_j_rev_dct(), ff_j_rev_dct4(), ff_row_fdct_c(), and row_fdct().

DESCALE

#define DESCALE	(		x,
			n )

Value:

RIGHT_SHIFT(x, n)

Definition at line 134 of file jfdctfst.c.

MULTIPLY

#define MULTIPLY	(		var,
			const )

Value:

((int16_t) DESCALE((var) * (const), CONST_BITS))

Definition at line 142 of file jfdctfst.c.

Referenced by ff_fdct_ifast(), ff_fdct_ifast248(), and row_fdct().

Function Documentation

row_fdct()

static av_always_inline void row_fdct ( int16_t * data )

static

Definition at line 144 of file jfdctfst.c.

Referenced by ff_fdct_ifast(), and ff_fdct_ifast248().

ff_fdct_ifast()

ff_fdct_ifast

(

int16_t *

data

)

Definition at line 207 of file jfdctfst.c.

Referenced by dct_quantize_trellis_c(), encode_init(), ff_convert_matrix(), ff_fdct_ifast(), and ff_fdctdsp_init().

ff_fdct_ifast248()

ff_fdct_ifast248

(

int16_t *

data

)

Definition at line 273 of file jfdctfst.c.

Referenced by ff_fdct_ifast248(), and ff_fdctdsp_init().

Variable Documentation

Sorry

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Definition at line 82 of file jfdctfst.c.