Add an extra check to avoid a case that cause black lines in scaled

vobsubs due to an overflow in the multiplication.


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@25668 b3059339-0415-0410-9bf9-f77b7e298cf2

1 files changed, 2 insertions, 0 deletions

diff --git a/spudec.c b/spudec.c
index ce579cccda..cec9a1ab75 100644
--- a/spudec.c
+++ b/spudec.c
@@ -731,6 +731,8 @@ static void scale_image(int x, int y, scale_pixel* table_x, scale_pixel* table_y
   color[2] = spu->image[base + spu->stride];
   color[3] = spu->image[base + spu->stride + 1];
   scale[0] = (table_x[x].left_up * table_y[y].left_up >> 16) * alpha[0];
+  if (table_y[y].left_up == 0x10000) // necessary to avoid overflow-case
+    scale[0] = table_x[x].left_up * alpha[0];
   scale[1] = (table_x[x].right_down * table_y[y].left_up >>16) * alpha[1];
   scale[2] = (table_x[x].left_up * table_y[y].right_down >> 16) * alpha[2];
   scale[3] = (table_x[x].right_down * table_y[y].right_down >> 16) * alpha[3];