Use correct dequantizer value

Originally committed as revision 8950 to svn://svn.ffmpeg.org/ffmpeg/trunk
18 years ago · 2a2072fe1e
parent 4a815a7f64
commit 2a2072fe1e
1 changed files with 1 additions and 1 deletions
--- a/libavcodec/vc1.c
+++ b/libavcodec/vc1.c
@ -2962,7 +2962,7 @@ static int vc1_decode_p_block(VC1Context *v, DCTELEM block[64], int n, int mquan
        if(ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) ttblk = TT_8X4;
        if(ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT) ttblk = TT_4X8;
    }
-    scale = 2 * mquant + v->halfpq;
+    scale = 2 * mquant + ((v->pq == mquant) ? v->halfpq : 0);

    // convert transforms like 8X4_TOP to generic TT and SUBBLKPAT
    if(ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) {