hvirtual/quicktime/ffmpeg/libavcodec/jfdctfst.c File Reference
#include <stdlib.h>#include <stdio.h>#include "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 | SHIFT_TEMPS |
| #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 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 75 of file jfdctfst.c.
Referenced by ff_fdct248_islow(), ff_jpeg_fdct_islow(), j_rev_dct(), j_rev_dct4(), quicktime_rev_dct(), and row_fdct().
| #define DCTSIZE 8 |
Definition at line 43 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 105 of file jfdctfst.c.
Referenced by ff_fdct248_islow(), ff_jpeg_fdct_islow(), idct_sh4(), j_rev_dct(), j_rev_dct4(), quicktime_rev_dct(), row_fdct(), and RTjpeg_idct().
| #define FIX_0_382683433 ((int32_t) 98) |
Definition at line 86 of file jfdctfst.c.
Referenced by fdct_ifast(), row_fdct(), and RTjpeg_dctY().
| #define FIX_0_541196100 ((int32_t) 139) |
Definition at line 87 of file jfdctfst.c.
Referenced by fdct_ifast(), ff_fdct248_islow(), ff_jpeg_fdct_islow(), j_rev_dct(), j_rev_dct4(), row_fdct(), and RTjpeg_dctY().
| #define FIX_0_707106781 ((int32_t) 181) |
Definition at line 88 of file jfdctfst.c.
Referenced by fdct_ifast(), fdct_ifast248(), row_fdct(), and RTjpeg_dctY().
| #define FIX_1_306562965 ((int32_t) 334) |
Definition at line 89 of file jfdctfst.c.
Referenced by fdct_ifast(), j_rev_dct(), j_rev_dct4(), row_fdct(), and RTjpeg_dctY().
| #define GLOBAL | ( | x | ) | x |
Definition at line 44 of file jfdctfst.c.
| #define MULTIPLY | ( | var, | |||
| const | ) | ((DCTELEM) DESCALE((var) * (const), CONST_BITS)) |
Definition at line 113 of file jfdctfst.c.
| #define RIGHT_SHIFT | ( | x, | |||
| n | ) | ((x) >> (n)) |
Definition at line 45 of file jfdctfst.c.
| #define SHIFT_TEMPS |
Definition at line 46 of file jfdctfst.c.
Referenced by fdct_ifast(), fdct_ifast248(), ff_fdct248_islow(), ff_jpeg_fdct_islow(), quicktime_rev_dct(), and row_fdct().
Function Documentation
| fdct_ifast | ( | DCTELEM * | data | ) |
Definition at line 179 of file jfdctfst.c.
References DCTSIZE, FIX_0_382683433, FIX_0_541196100, FIX_0_707106781, FIX_1_306562965, MULTIPLY, row_fdct(), and SHIFT_TEMPS.
Referenced by dct_error(), dsputil_init(), and main().
| fdct_ifast248 | ( | DCTELEM * | data | ) |
Definition at line 246 of file jfdctfst.c.
References DCTSIZE, FIX_0_707106781, MULTIPLY, row_fdct(), and SHIFT_TEMPS.
Referenced by dsputil_init().
| static always_inline void row_fdct | ( | DCTELEM * | data | ) | [static] |
Definition at line 115 of file jfdctfst.c.
References DCTSIZE, FIX_0_382683433, FIX_0_541196100, FIX_0_707106781, FIX_1_306562965, MULTIPLY, and SHIFT_TEMPS.
