shithub: sox

Info  •  Files  •  Log  •  Branches

added option normalise across all channels or normalise individual channels

--- a/src/normalise.c

+++ b/src/normalise.c

@@ -21,6 +21,7 @@

 #include <string.h>

 typedef struct norm {

+  sox_bool      individual;

   double        norm0;    /* Multiplier to take to 0dB FSD */

   double        level;    /* Multiplier to take to 'level' */

   sox_sample_t  min, max;

@@ -35,6 +36,7 @@

   priv_t p = (priv_t)effp->priv;

   char dummy;

+  if (argc && !strcmp(*argv, "-i")) p->individual = sox_true, ++argv, --argc;

   if (argc > 1 || (argc == 1 &&

         (sscanf(*argv, "%lf%c", &p->level, &dummy) != 1 || p->level > 0)))

     return sox_usage(effp);

@@ -46,6 +48,8 @@

 {

   priv_t p = (priv_t)effp->priv;

+  if (!p->individual)

+    effp->flows = 1;

   p->norm0 = p->max = p->min = 0;

   p->tmp_file = tmpfile();

   if (p->tmp_file == NULL) {

@@ -106,7 +110,7 @@

 sox_effect_handler_t const * sox_norm_effect_fn(void)

 {

   static sox_effect_handler_t handler = {

-    "norm", "[level]", 0, create, start, flow, drain, stop, NULL

+    "norm", "[-i] [level]", 0, create, start, flow, drain, stop, NULL

   };

   return &handler;

 }