FFmpeg: libavcodec/jfdctfst.c File Reference

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jfdctfst.c File Reference

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

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

Go to the source code of this file.

Macros

#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) /* FIX(0.382683433) */

#define FIX_0_541196100 ((int32_t) 139) /* FIX(0.541196100) */

#define FIX_0_707106781 ((int32_t) 181) /* FIX(0.707106781) */

#define FIX_1_306562965 ((int32_t) 334) /* FIX(1.306562965) */

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

#define MULTIPLY(var, const) ((int16_t) DESCALE((var) * (const), CONST_BITS))

Functions

static av_always_inline void row_fdct (int16_t *data)

ff_fdct_ifast (int16_t *data)

ff_fdct_ifast248 (int16_t *data)

Detailed Description

Independent JPEG Group's fast AAN dct.

Definition in file jfdctfst.c.

Macro Definition Documentation

#define DCTSIZE 8

Definition at line 74 of file jfdctfst.c.

Referenced by ff_fdct_ifast(), ff_fdct_ifast248(), ff_j_rev_dct(), ff_j_rev_dct4(), and row_fdct().

#define GLOBAL ( x ) x

Definition at line 75 of file jfdctfst.c.

#define RIGHT_SHIFT ( x,

) ((x) >> (n))

Definition at line 76 of file jfdctfst.c.

#define CONST_BITS 8

Definition at line 105 of file jfdctfst.c.

#define FIX_0_382683433 ((int32_t) 98) /* FIX(0.382683433) */

Definition at line 116 of file jfdctfst.c.

Referenced by ff_fdct_ifast(), and row_fdct().

#define FIX_0_541196100 ((int32_t) 139) /* FIX(0.541196100) */

Definition at line 117 of file jfdctfst.c.

Referenced by ff_fdct_ifast(), and row_fdct().

#define FIX_0_707106781 ((int32_t) 181) /* FIX(0.707106781) */

Definition at line 118 of file jfdctfst.c.

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

#define FIX_1_306562965 ((int32_t) 334) /* FIX(1.306562965) */

Definition at line 119 of file jfdctfst.c.

Referenced by ff_fdct_ifast(), and row_fdct().

#define DESCALE ( x,

) RIGHT_SHIFT(x, n)

Definition at line 135 of file jfdctfst.c.

#define MULTIPLY ( var,

const

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

Definition at line 143 of file jfdctfst.c.

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

Function Documentation

static av_always_inline void row_fdct ( int16_t * data )

static

Definition at line 145 of file jfdctfst.c.

Referenced by ff_fdct_ifast(), and ff_fdct_ifast248().

ff_fdct_ifast ( int16_t * data )

Definition at line 208 of file jfdctfst.c.

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

ff_fdct_ifast248 ( int16_t * data )

Definition at line 274 of file jfdctfst.c.

Referenced by ff_dsputil_init().

Generated on Wed Jul 10 2013 23:48:21 for FFmpeg by doxygen 1.8.2