mpeg4videodec: silence ubsan warning

[ffmpeg] / libavcodec / dvdec.c

diff --git a/libavcodec/dvdec.c b/libavcodec/dvdec.c
index b75bcb9a1f5eab3e7eb0ac00c0e8dd4623430577..0b4c1bc2879ff7915aaac5861afb618352ccaade 100644 (file)
--- a/libavcodec/dvdec.c
+++ b/libavcodec/dvdec.c
@@ -347,7 +347,7 @@ retry:
                                     dct_mode                        * 22 * 64 +
                                     (quant + ff_dv_quant_offset[class1]) * 64];
             }
-            dc = dc << 2;
+            dc = dc * 4;
             /* convert to unsigned because 128 is not added in the
              * standard IDCT */
             dc                   += 1024;