shithub: sox

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prevent division by 0 when input signal is entirely non-negative, non-positive, or both

--- a/src/gain.c

+++ b/src/gain.c

@@ -80,7 +80,9 @@

     if (!p->do_equalise && !p->do_balance && !p->do_balance_no_clip)

       effp->flows = 1; /* essentially a conditional SOX_EFF_MCHAN */

   }

-  p->mult = p->max = p->min = 0;

+  p->mult = 0;

+  p->max = 1;

+  p->min = -1;

   if (p->do_scan) {

     p->tmp_file = lsx_tmpfile();

     if (p->tmp_file == NULL) {