Re: [9fans] sb16(?) problem: audio timeout / mpg123: problem: division-by-zero

[Axel Belinfante <Axel.Belinfante@cs.utwente.nl>]

Thanks to those who reacted; I solved the problems.

I got the sb working by simply trying more irq/dma
configurations in plan9.ini (in my case: irq=5 dma=1 works).

W.r.t. mpg123 it looks like my hack-around works.
For the archives:
version: mpg123-0.59r
problem: division-by-zero
hack-around:

--- layer3.c	Wed Apr 21 17:25:18 1999
+++ /tmp/layer3.c	Fri Apr  5 16:23:52 2002
@@ -169,10 +169,14 @@

   for(i=0;i<16;i++) {
     double t = tan( (double) i * M_PI / 12.0 );
-    tan1_1[i] = t / (1.0+t);
-    tan2_1[i] = 1.0 / (1.0 + t);
-    tan1_2[i] = M_SQRT2 * t / (1.0+t);
-    tan2_2[i] = M_SQRT2 / (1.0 + t);
+    double tt = (1.0+t);
+    if (tt == 0.0)
+	tt = 0.00001;
+    /* fprintf(stderr, "tt=%f\n", tt); */
+    tan1_1[i] = t / tt;
+    tan2_1[i] = 1.0 / tt;
+    tan1_2[i] = M_SQRT2 * t / tt;
+    tan2_2[i] = M_SQRT2 / tt;

     for(j=0;j<2;j++) {
       double base = pow(2.0,-0.25*(j+1.0));

Regards,
Axel.