Note: This bug is displayed in read-only format because the product is no longer active in Red Hat Bugzilla.

Bug 19642

Summary:	"Scope" visualisation mode displayed half-width
Product:	[Retired] Red Hat Linux	Reporter:	Need Real Name <c9721928>
Component:	xmms	Assignee:	Bill Nottingham <notting>
Status:	CLOSED RAWHIDE	QA Contact:
Severity:	low	Docs Contact:
Priority:	medium
Version:	6.2	CC:	rvokal
Target Milestone:	---
Target Release:	---
Hardware:	i386
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2000-11-15 23:45:34 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Need Real Name 2000-10-23 22:43:53 UTC

Whilst an MP3 is playing with the "Scope" visualisation mode selected, the
waveform covers only the left-hand half of the scope area. A (stationary)
flat line is shown in the right-hand half.

Output is to an Opti MAD16 sound card, which is described in /dev/sndstat
as:

MAD16 WSS (82C930) (DUPLEX)

This bug is visible in versions of xmms upto and including 1.2.2, Linux
kernels upto and including 2.2.16-3. Sound output via OSS driver.

Comment 1 Bill Nottingham 2000-11-13 07:06:55 UTC

Have you tried 1.2.3?  I can't reproduce this on the cards I've
tested on.

Comment 2 Need Real Name 2000-11-15 23:45:31 UTC

I've just had a look at the problem again and have some more info for you:

 - With downsampling set to 1:1 (44kHz) in the "MPEG Layer 1/2/3 Player 1.2.3
[libmpg123.so]"
    input plugin, the waveform fills the entire display area, as it is supposed
to.
 - With downsampling set to 1:2 (22kHz) only the left-hand half of the display
has a waveform.
 - With downsampling set to 1:4 (11kHz) only the left-hand quarter of the
display has a waveform.

I normally use 1:2 (22kHz) for performance reasons.

I've not looked at the source, but from the program behaviour it looks as if
XMMS is providing a bigger buffer for the waveform data than is actually being
filled, leaving the rest as zeros. Yes, the problem is also present in
xmms-1.2.3-2 from RawHide.

Comment 3 Bill Nottingham 2001-02-01 17:38:20 UTC

Ugly hack added in xmms-1.2.4-7.