dvd-sector-copy.c: Allow averaging `alpha' to be set as a parameter.

diff --git a/dvd-sector-copy.c b/dvd-sector-copy.c
index bed3cf6..76dfa13 100644 (file)
--- a/dvd-sector-copy.c
+++ b/dvd-sector-copy.c
@@ -313,6 +313,8 @@ static void render_badblock_progress(struct progress_item *item,
   progress_shownotice(render, bg, 7);
 }
 
+static double alpha = 0.1;
+
 static void update_progress(secaddr pos)
 {
   struct timeval now;
@@ -321,8 +323,7 @@ static void update_progress(secaddr pos)
   gettimeofday(&now, 0);
   t = tvdiff(&last_time, &now);
 
-#define ALPHA 0.1
-#define BETA (1 - ALPHA)
+#define BETA (1 - alpha)
 
   if (t) {
     g = wcount ? pow(BETA, t) : 0.0; f = (1 - g)/(1 - BETA);
@@ -332,7 +333,6 @@ static void update_progress(secaddr pos)
     last_time = now; last_pos = pos;
   }
 
-#undef ALPHA
 #undef BETA
 
   throbix++; if (!throbber[throbix]) throbix = 0;
@@ -1035,6 +1035,8 @@ int main(int argc, char *argv[])
            step_max = parse_int(&p, 1, SECLIMIT - 1, "step maximum");
          else if (SKIP_PREFIX("retry"))
            max_retries = parse_int(&p, 0, INT_MAX, "retries");
+         else if (SKIP_PREFIX("alpha"))
+           alpha = parse_float(&p, 0, 1, "average decay factor");
          else if (SKIP_PREFIX("_badwait"))
            bad_block_delay = parse_float(&p, 0, DBL_MAX, "bad-block delay");
          else if (SKIP_PREFIX("_blkwait"))