From: bugtrack@alsa-project.org
To: alsa-devel@alsa-project.org
Subject: [ALSA - driver 0001724]: au88x0 PCM configuration problem - buffer_size constraint
Date: Mon, 13 Feb 2006 03:11:38 +0100 [thread overview]
Message-ID: <be5344fb97523bbb1b3cb8e86f357b07@bugtrack.alsa-project.org> (raw)
A NOTE has been added to this issue.
======================================================================
<https://bugtrack.alsa-project.org/alsa-bug/view.php?id=1724>
======================================================================
Reported By: Raymond
Assigned To: mjander
======================================================================
Project: ALSA - driver
Issue ID: 1724
Category: PCI - au88x0
Reproducibility: always
Severity: block
Priority: normal
Status: assigned
Distribution:
Kernel Version:
======================================================================
Date Submitted: 01-07-2006 05:10 CET
Last Modified: 02-13-2006 03:11 CET
======================================================================
Summary: au88x0 PCM configuration problem - buffer_size
constraint
Description:
/cvs/alsa-lib/test/pcm_min
ALSA lib pcm.c:7127:(snd_pcm_set_params) Unable to set buffer time
(latency) 500000 for PLAYBACK: Invalid argument
Playback open error: Invalid argument
sound card is au8830, the au88x0 driver only accept period size in power
of 2.
======================================================================
Relationships ID Summary
----------------------------------------------------------------------
related to 0001766 jackd : ALSA: cannot set period size to...
======================================================================
----------------------------------------------------------------------
Raymond - 02-07-06 07:35
----------------------------------------------------------------------
It is not pratical to describe that buffer_size must be N * period_size
with pow2 restriction.
64K / 32 = 2K entries
----------------------------------------------------------------------
Raymond - 02-13-06 03:11
----------------------------------------------------------------------
aplay -D hw:0,0 can find a safe value of period_size for all .wav files in
the vortex driver CD without underrun. The period_size varies between
different rate and format
However if I specified aplay to use any period-size less than 32, the
message will appear in the system log
aplay -D hw:0,0 --period-size=16 *.wav
dmesg
vortex: 0 virt=2, real=2, delta=2
vortex: 0 virt=11, real=3, delta=2
vortex: 0 virt=20, real=0, delta=2
vortex: 0 virt=29, real=1, delta=2
vortex: 0 virt=6, real=2, delta=2
vortex: 0 virt=15, real=3, delta=2
vortex: 0 virt=24, real=0, delta=2
vortex: 0 virt=1, real=1, delta=2
vortex: 0 virt=10, real=2, delta=2
vortex: 0 virt=19, real=3, delta=2
vortex: 0 virt=28, real=0, delta=2
vortex: 0 virt=5, real=1, delta=2
vortex: 0 virt=14, real=2, delta=2
vortex: 0 virt=23, real=3, delta=2
vortex: 0 virt=0, real=0, delta=2
vortex: 0 virt=9, real=1, delta=2
vortex: 0 virt=18, real=2, delta=2
vortex: 0 virt=27, real=3, delta=2
vortex: 0 virt=4, real=0, delta=2
vortex: 0 virt=13, real=1, delta=2
vortex: 0 virt=22, real=2, delta=2
vortex: 0 virt=31, real=3, delta=2
vortex: 0 virt=8, real=0, delta=2
vortex: 0 virt=17, real=1, delta=2
vortex: 0 virt=26, real=2, delta=2
vortex: 0 virt=3, real=3, delta=2
vortex: 0 virt=12, real=0, delta=2
vortex: 0 virt=21, real=1, delta=2
vortex: 0 virt=30, real=2, delta=2
vortex: 0 virt=7, real=3, delta=2
vortex: 0 virt=16, real=0, delta=2
vortex: 0 virt=25, real=1, delta=2
vortex: 0 virt=2, real=2, delta=2
vortex: 0 virt=11, real=3, delta=2
vortex: 0 virt=20, real=0, delta=2
vortex: 0 virt=29, real=1, delta=2
vortex: 0 virt=6, real=2, delta=2
vortex: 0 virt=15, real=3, delta=2
vortex: 0 virt=24, real=0, delta=2
What is the relationship between period_size and period_byte ?
Issue History
Date Modified Username Field Change
======================================================================
01-07-06 05:10 Raymond New Issue
01-09-06 15:19 Raymond Note Added: 0007537
01-19-06 15:04 Raymond Note Deleted: 0007537
01-19-06 15:36 Raymond Note Added: 0007721
01-28-06 07:58 Raymond Note Added: 0007828
01-28-06 07:58 Raymond Note Deleted: 0007721
01-30-06 18:46 Raymond Note Added: 0007840
01-31-06 03:15 Raymond Note Added: 0007844
01-31-06 06:41 Raymond Note Edited: 0007840
01-31-06 07:03 Raymond Note Edited: 0007840
01-31-06 07:08 Raymond Note Edited: 0007840
01-31-06 07:11 Raymond Note Edited: 0007840
01-31-06 08:31 Raymond Note Edited: 0007840
01-31-06 09:48 Raymond Note Edited: 0007844
01-31-06 10:19 perex Note Added: 0007845
01-31-06 10:26 perex Note Added: 0007847
01-31-06 10:26 perex Note Edited: 0007847
01-31-06 10:48 perex Project ALSA - lib => ALSA -
driver
01-31-06 10:49 perex Category 0_general => PCI - au88x0
01-31-06 10:49 perex Summary simple PCM helper
function => au88x0 PCM configuration problem - buffer_size constraint
01-31-06 11:06 Raymond Note Added: 0007848
01-31-06 13:48 perex Status new => assigned
01-31-06 13:48 perex Assigned To => mjander
01-31-06 13:49 perex Relationship added related to 0001766
01-31-06 15:59 Raymond Note Added: 0007852
02-01-06 07:35 perex Note Added: 0007857
02-01-06 10:32 Raymond Note Added: 0007858
02-01-06 10:37 Raymond Note Edited: 0007848
02-01-06 17:15 Raymond Note Edited: 0007844
02-01-06 17:20 Raymond Note Added: 0007860
02-02-06 10:23 Raymond Note Added: 0007874
02-02-06 11:10 Raymond Note Edited: 0007874
02-02-06 15:48 Raymond Note Edited: 0007874
02-03-06 14:26 Raymond Note Added: 0007897
02-04-06 02:46 Raymond Note Edited: 0007874
02-04-06 02:52 Raymond Note Edited: 0007858
02-04-06 02:56 Raymond Note Edited: 0007858
02-05-06 16:39 Raymond Note Added: 0007939
02-05-06 16:48 Raymond Note Added: 0007940
02-06-06 04:40 Raymond Note Deleted: 0007939
02-06-06 06:15 Raymond Note Edited: 0007940
02-07-06 07:35 Raymond Note Added: 0007954
02-13-06 03:11 Raymond Note Added: 0008036
======================================================================
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next reply other threads:[~2006-02-13 2:11 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-02-13 2:11 bugtrack [this message]
-- strict thread matches above, loose matches on Subject: below --
2006-07-22 0:34 [ALSA - driver 0001724]: au88x0 PCM configuration problem - buffer_size constraint bugtrack
2006-07-20 7:29 bugtrack
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2006-01-31 9:49 bugtrack
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