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permuted coefs in normal IDCT to avoid having different cases there 

Originally committed as revision 47 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Fabrice Bellard 2001-08-07 22:45:35 +00:00
parent dc541ee74b
commit 13b5475264
1 changed files with 9 additions and 7 deletions
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16
libavcodec/jrevdct.c
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@ -197,16 +197,18 @@ void j_rev_dct(DCTBLOCK data)
register int *idataptr = (int*)dataptr; register int *idataptr = (int*)dataptr;
/* WARNING: we do the same permutation as MMX idct to simplify the
video core */
d0 = dataptr[0]; d0 = dataptr[0];
d1 = dataptr[1]; d2 = dataptr[1];
d2 = dataptr[2]; d4 = dataptr[2];
d3 = dataptr[3]; d6 = dataptr[3];
d4 = dataptr[4]; d1 = dataptr[4];
d5 = dataptr[5]; d3 = dataptr[5];
d6 = dataptr[6]; d5 = dataptr[6];
d7 = dataptr[7]; d7 = dataptr[7];
if ((d1 == 0) && (idataptr[1] | idataptr[2] | idataptr[3]) == 0) { if ((d1 | d2 | d3 | d4 | d5 | d6 | d7) == 0) {
/* AC terms all zero */ /* AC terms all zero */
if (d0) { if (d0) {
/* Compute a 32 bit value to assign. */ /* Compute a 32 bit value to assign. */