Fix Mhz detection. Thanks to Simon Barner for pointing to example code.

Obtained from:	mplayer

1 files changed, 50 insertions, 1 deletions

diff --git a/audio/jack/files/patch-client.c b/audio/jack/files/patch-client.c
index 18b68558a6f1..bd2fe8768ddf 100644
--- a/audio/jack/files/patch-client.c
+++ b/audio/jack/files/patch-client.c
@@ -1,5 +1,5 @@
 --- libjack/client.c.orig	Sun Jan 11 20:07:14 2004
-+++ libjack/client.c	Tue Mar  9 20:19:15 2004
++++ libjack/client.c	Wed Mar 10 12:32:47 2004
 @@ -26,20 +26,23 @@
  #else
      #include <sys/poll.h>
@@ -55,3 +55,52 @@
  /* a bigger stack makes the application crash... */
  #define BIG_ENOUGH_STACK 10000
  #else
+@@ -1748,6 +1758,15 @@
+ 	return client->thread_id;
+ }
+ 
++static int64_t
++rdtsc(void)
++{
++        unsigned int i, j;
++#define RDTSC   ".byte 0x0f, 0x31; "
++        asm(RDTSC : "=a"(i), "=d"(j) : );
++        return ((int64_t)j<<32) + (int64_t)i;
++}
++
+ #if defined(__APPLE__) && defined(__POWERPC__) 
+ 
+ double __jack_time_ratio;
+@@ -1763,6 +1782,7 @@
+ jack_time_t
+ jack_get_mhz (void)
+ {
++#ifndef __FreeBSD__
+ 	FILE *f = fopen("/proc/cpuinfo", "r");
+ 	if (f == 0)
+ 	{
+@@ -1803,6 +1823,24 @@
+ 			return (jack_time_t)mhz;
+ 		}
+ 	}
++
++#else
++       int64_t tsc_start, tsc_end;
++       struct timeval tv_start, tv_end;
++       int usec_delay;
++                     
++       tsc_start = rdtsc();   
++       gettimeofday(&tv_start, NULL);
++       usleep(100000);
++       tsc_end = rdtsc();
++       gettimeofday(&tv_end, NULL);
++                
++       usec_delay = 1000000 * (tv_end.tv_sec - tv_start.tv_sec)
++           + (tv_end.tv_usec - tv_start.tv_usec);
++                         
++       printf("cpu MHz\t\t: %.3f\n",
++           (double)(tsc_end-tsc_start) / usec_delay);
++#endif 
+ }
+ 
+ jack_time_t __jack_cpu_mhz;