libavcodec/jfdctfst.c File Reference

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

#include <stdlib.h>
#include <stdio.h>
#include "libavutil/common.h"
#include "dsputil.h"

Go to the source code of this file.

Defines
#define	DCTSIZE   8
#define	GLOBAL(x)   x
#define	RIGHT_SHIFT(x, n)   ((x) >> (n))
#define	CONST_BITS   8
#define	FIX_0_382683433   ((int32_t) 98)
#define	FIX_0_541196100   ((int32_t) 139)
#define	FIX_0_707106781   ((int32_t) 181)
#define	FIX_1_306562965   ((int32_t) 334)
#define	DESCALE(x, n)   RIGHT_SHIFT(x, n)
#define	MULTIPLY(var, const)   ((DCTELEM) DESCALE((var) * (const), CONST_BITS))
Functions
static av_always_inline void	row_fdct (DCTELEM *data)
	fdct_ifast (DCTELEM *data)
	fdct_ifast248 (DCTELEM *data)

---

Detailed Description

Independent JPEG Group's fast AAN dct.

Definition in file jfdctfst.c.

---

Define Documentation

#define CONST_BITS   8

Definition at line 107 of file jfdctfst.c.

Referenced by ff_fdct248_islow(), ff_jpeg_fdct_islow(), j_rev_dct(), j_rev_dct4(), and row_fdct().

#define DCTSIZE   8

Definition at line 76 of file jfdctfst.c.

Referenced by fdct_ifast(), fdct_ifast248(), ff_fdct248_islow(), ff_jpeg_fdct_islow(), j_rev_dct(), j_rev_dct4(), and row_fdct().

#define DESCALE	(	x,
		n		)	RIGHT_SHIFT(x, n)

Definition at line 137 of file jfdctfst.c.

Referenced by ff_fdct248_islow(), ff_jpeg_fdct_islow(), idct_sh4(), j_rev_dct(), j_rev_dct4(), and row_fdct().

#define FIX_0_382683433   ((int32_t) 98)

Definition at line 118 of file jfdctfst.c.

Referenced by fdct_ifast(), and row_fdct().

#define FIX_0_541196100   ((int32_t) 139)

Definition at line 119 of file jfdctfst.c.

Referenced by fdct_ifast(), ff_fdct248_islow(), ff_jpeg_fdct_islow(), j_rev_dct(), j_rev_dct4(), and row_fdct().

#define FIX_0_707106781   ((int32_t) 181)

Definition at line 120 of file jfdctfst.c.

Referenced by fdct_ifast(), fdct_ifast248(), and row_fdct().

#define FIX_1_306562965   ((int32_t) 334)

Definition at line 121 of file jfdctfst.c.

Referenced by fdct_ifast(), j_rev_dct(), j_rev_dct4(), and row_fdct().

#define GLOBAL

(

x

)

x

Definition at line 77 of file jfdctfst.c.

#define MULTIPLY	(	var,
		const		)	((DCTELEM) DESCALE((var) * (const), CONST_BITS))

Definition at line 145 of file jfdctfst.c.

#define RIGHT_SHIFT	(	x,
		n		)	((x) >> (n))

Definition at line 78 of file jfdctfst.c.

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Function Documentation

fdct_ifast

(

DCTELEM *

data

)

Definition at line 210 of file jfdctfst.c.

Referenced by dct_quantize_trellis_c(), dsputil_init(), and ff_convert_matrix().

fdct_ifast248

(

DCTELEM *

data

)

Definition at line 276 of file jfdctfst.c.

Referenced by dsputil_init().

static av_always_inline void row_fdct

(

DCTELEM *

data

)

[static]

Definition at line 147 of file jfdctfst.c.