Electronic Arts TGQ/TQI/MAD IDCT algorithm. More...
#include "dsputil.h"
Go to the source code of this file.
Defines | |
#define | ASQRT 181 |
#define | A4 669 |
#define | A2 277 |
#define | A5 196 |
#define | IDCT_TRANSFORM(dest, s0, s1, s2, s3, s4, s5, s6, s7, d0, d1, d2, d3, d4, d5, d6, d7, munge, src) |
#define | MUNGE_NONE(x) (x) |
#define | IDCT_COL(dest, src) IDCT_TRANSFORM(dest,0,8,16,24,32,40,48,56,0,8,16,24,32,40,48,56,MUNGE_NONE,src) |
#define | MUNGE_8BIT(x) av_clip_uint8((x)>>4) |
#define | IDCT_ROW(dest, src) IDCT_TRANSFORM(dest,0,1,2,3,4,5,6,7,0,1,2,3,4,5,6,7,MUNGE_8BIT,src) |
Functions | |
static void | ea_idct_col (DCTELEM *dest, const DCTELEM *src) |
void | ff_ea_idct_put_c (uint8_t *dest, int linesize, DCTELEM *block) |
Electronic Arts TGQ/TQI/MAD IDCT algorithm.
Definition in file eaidct.c.
#define IDCT_COL | ( | dest, | ||
src | ||||
) | IDCT_TRANSFORM(dest,0,8,16,24,32,40,48,56,0,8,16,24,32,40,48,56,MUNGE_NONE,src) |
Definition at line 60 of file eaidct.c.
Referenced by ea_idct_col().
Definition at line 63 of file eaidct.c.
Referenced by ff_ea_idct_put_c().
#define IDCT_TRANSFORM | ( | dest, | ||
s0, | ||||
s1, | ||||
s2, | ||||
s3, | ||||
s4, | ||||
s5, | ||||
s6, | ||||
s7, | ||||
d0, | ||||
d1, | ||||
d2, | ||||
d3, | ||||
d4, | ||||
d5, | ||||
d6, | ||||
d7, | ||||
munge, | ||||
src | ||||
) |
{\ const int a1 = (src)[s1] + (src)[s7]; \ const int a7 = (src)[s1] - (src)[s7]; \ const int a5 = (src)[s5] + (src)[s3]; \ const int a3 = (src)[s5] - (src)[s3]; \ const int a2 = (src)[s2] + (src)[s6]; \ const int a6 = (ASQRT*((src)[s2] - (src)[s6]))>>8; \ const int a0 = (src)[s0] + (src)[s4]; \ const int a4 = (src)[s0] - (src)[s4]; \ const int b0 = (((A4-A5)*a7 - A5*a3)>>9) + a1+a5; \ const int b1 = (((A4-A5)*a7 - A5*a3)>>9) + ((ASQRT*(a1-a5))>>8); \ const int b2 = (((A2+A5)*a3 + A5*a7)>>9) + ((ASQRT*(a1-a5))>>8); \ const int b3 = ((A2+A5)*a3 + A5*a7)>>9; \ (dest)[d0] = munge(a0+a2+a6+b0); \ (dest)[d1] = munge(a4+a6 +b1); \ (dest)[d2] = munge(a4-a6 +b2); \ (dest)[d3] = munge(a0-a2-a6+b3); \ (dest)[d4] = munge(a0-a2-a6-b3); \ (dest)[d5] = munge(a4-a6 -b2); \ (dest)[d6] = munge(a4+a6 -b1); \ (dest)[d7] = munge(a0+a2+a6-b0); \ }
Definition at line 65 of file eaidct.c.
Referenced by ff_ea_idct_put_c().