@@ -40,6 +40,7 @@ static int32_t parse_gain(const char *gain)

     char *fraction;

     int  scale = 10000;

     int32_t mb = 0;

+    int sign   = 1;

     int db;

     if (!gain)

@@ -47,6 +48,9 @@ static int32_t parse_gain(const char *gain)

     gain += strspn(gain, " \t");

+    if (*gain == '-')

+        sign = -1;

+

     db = strtol(gain, &fraction, 0);

     if (*fraction++ == '.') {

         while (av_isdigit(*fraction) && scale) {

@@ -59,7 +63,7 @@ static int32_t parse_gain(const char *gain)

     if (abs(db) > (INT32_MAX - mb) / 100000)

         return INT32_MIN;

-    return db * 100000 + FFSIGN(db) * mb;

+    return db * 100000 + sign * mb;

 }

 static uint32_t parse_peak(const uint8_t *peak)