avcodec/utils: Fix undefined behavior in avpriv_toupper4

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
11 years ago · a071c0b515
parent 30aeab29e4
commit a071c0b515
1 changed files with 1 additions and 1 deletions
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@ -3454,7 +3454,7 @@ unsigned int avpriv_toupper4(unsigned int x)
    return av_toupper(x & 0xFF) +
          (av_toupper((x >>  8) & 0xFF) << 8)  +
          (av_toupper((x >> 16) & 0xFF) << 16) +
-          (av_toupper((x >> 24) & 0xFF) << 24);
+((unsigned)av_toupper((x >> 24) & 0xFF) << 24);
 }

 int ff_thread_ref_frame(ThreadFrame *dst, ThreadFrame *src)