avcodec/cfhd: fix overflow in multiplication in LUT calculation

diff --git a/libavcodec/cfhd.c b/libavcodec/cfhd.c
index 36fdc840a6075ef6a59f3b9abb30cd66ebee6d44..611fae53d85756a3e0e47f2b81df6bd73514fb94 100644 (file)
--- a/libavcodec/cfhd.c
+++ b/libavcodec/cfhd.c
@@ -65,7 +65,7 @@ static av_cold int cfhd_init(AVCodecContext *avctx)
     }
 
     for (int i = 0; i < 256; i++)
-        s->lut[1][i] = i + ((768 * i * i * i) / (256 * 256 * 256));
+        s->lut[1][i] = i + ((768LL * i * i * i) / (256 * 256 * 256));
 
     return ff_cfhd_init_vlcs(s);
 }