[SCM] libav/experimental: use libmpeg2 idct to decode xvid videos unless the user forced some other idct

[siretart at users.alioth.debian.org]

The following commit has been merged in the experimental branch:
commit ee0c00d3b43dcf53bca1a0a89ffab2d6140c811f
Author: Michael Niedermayer <michaelni at gmx.at>
Date:   Fri Jun 25 19:14:23 2004 +0000

    use libmpeg2 idct to decode xvid videos unless the user forced some other idct
    
    Originally committed as revision 3251 to svn://svn.ffmpeg.org/ffmpeg/trunk

diff --git a/libavcodec/h263dec.c b/libavcodec/h263dec.c
index 4394432..31580e4 100644
--- a/libavcodec/h263dec.c
+++ b/libavcodec/h263dec.c
@@ -623,7 +623,11 @@ retry:
     fprintf(f, "%d %d %f\n", buf_size, s->qscale, buf_size*(double)s->qscale);
 }
 #endif
-       
+    
+    if(s->codec_id == CODEC_ID_MPEG4 && s->xvid_build && avctx->idct_algo == FF_IDCT_AUTO && (mm_flags & MM_MMX) && !(s->flags&CODEC_FLAG_BITEXACT)){
+        avctx->idct_algo= FF_IDCT_LIBMPEG2MMX;
+        avctx->width= 0; // force reinit
+    }
         /* After H263 & mpeg4 header decode we have the height, width,*/
         /* and other parameters. So then we could init the picture   */
         /* FIXME: By the way H263 decoder is evolving it should have */

-- 
Libav/FFmpeg packaging