ape: Avoid undefined behaviour

Avoid the clang warning "warning: shifting a negative signed value is undefined"
9 years ago · f3fdef108e
parent 6b2ad3ca48
commit f3fdef108e
1 changed files with 1 additions and 1 deletions
--- 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;