Defines | Functions

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.

#define DCTSIZE   8

Definition at line 76 of file jfdctfst.c.

Referenced by fdct_ifast(), fdct_ifast248(), 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.

#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(), 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(), 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.

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

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

Definition at line 78 of file jfdctfst.c.


Function Documentation

fdct_ifast ( DCTELEM data  ) 

Definition at line 210 of file jfdctfst.c.

Referenced by dct_quantize_trellis_c(), and ff_convert_matrix().

fdct_ifast248 ( DCTELEM data  ) 

Definition at line 276 of file jfdctfst.c.

static av_always_inline void row_fdct ( DCTELEM data  )  [static]

Definition at line 147 of file jfdctfst.c.

Referenced by fdct_ifast(), and fdct_ifast248().