Date: Mon, 27 Sep 1999 16:00:27 -0700 (PDT) From: youki@center.osaka-u.ac.jp To: freebsd-gnats-submit@freebsd.org Subject: kern/14006: pas2_pcm.c pcm playback problem, with fix Message-ID: <19990927230027.7E05514F08@hub.freebsd.org>
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>Number: 14006
>Category: kern
>Synopsis: pas2_pcm.c pcm playback problem, with fix
>Confidential: no
>Severity: non-critical
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Mon Sep 27 16:10:00 PDT 1999
>Closed-Date:
>Last-Modified:
>Originator: Youki Kadobayashi
>Release: 3.3-RELEASE
>Organization:
Computation Center, Osaka University
>Environment:
FreeBSD xps3.aist-nara.ac.jp 3.3-RELEASE FreeBSD 3.3-RELEASE #6: Tue Sep 28 07:36:54 JST 1999 youki-k@xps3.aist-nara.ac.jp:/usr/src/kame/freebsd3/sys/compile/DELL.v6 i386
PC with PAS16 card
>Description:
pas2_pcm.c does not calculate sampling rate correctly.
As a result, stereo audio playback occurs at higher pitch.
>How-To-Repeat:
mpg123 someaudiofile.mp3
>Fix:
I verified the following patch fixes the problem.
*** /sys/i386/isa/sound/pas2_pcm.c.bak Thu Jul 29 21:36:54 1999
--- /sys/i386/isa/sound/pas2_pcm.c Tue Sep 28 07:41:32 1999
***************
*** 66,77 ****
if (arg < 5000)
arg = 5000;
- foo = (1193180 + (arg / 2)) / arg;
- arg = 1193180 / foo;
-
if (pcm_channels & 2)
! foo = foo >> 1;
pcm_speed = arg;
tmp = pas_read(FILTER_FREQUENCY);
--- 66,77 ----
if (arg < 5000)
arg = 5000;
if (pcm_channels & 2)
! foo = (1193180 + arg) / (arg * 2);
! else
! foo = (1193180 + (arg / 2)) / arg;
+ arg = 1193180 / foo;
pcm_speed = arg;
tmp = pas_read(FILTER_FREQUENCY);
>Release-Note:
>Audit-Trail:
>Unformatted:
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