[FFmpeg-cvslog] ape: Avoid undefined behaviour

[Luca Barbato]

ffmpeg | branch: master | Luca Barbato <lu_zero at gentoo.org> | Tue Apr 12 22:14:26 2016 +0200| [f3fdef108eb06b1e71b29152bf6822519e787efe] | committer: Luca Barbato

ape: Avoid undefined behaviour

Avoid the clang warning

"warning: shifting a negative signed value is undefined"

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=f3fdef108eb06b1e71b29152bf6822519e787efe
---

 libavcodec/apedec.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/apedec.c b/libavcodec/apedec.c
index d33139b..85d26ae 100644
--- a/libavcodec/apedec.c
+++ b/libavcodec/apedec.c
@@ -1305,7 +1305,7 @@ static void do_apply_filter(APEContext *ctx, int version, APEFilter *f,
             /* Update the adaption coefficients */
             absres = FFABS(res);
             if (absres)
-                *f->adaptcoeffs = ((res & (-1<<31)) ^ (-1<<30)) >>
+                *f->adaptcoeffs = ((res & ((~0UL) << 31)) ^ ((~0UL) << 30)) >>
                                   (25 + (absres <= f->avg*3) + (absres <= f->avg*4/3));
             else
                 *f->adaptcoeffs = 0;