From: Lennart Poettering <mznyfn@0pointer.de>
To: ALSA Development Mailing List <alsa-devel@alsa-project.org>
Subject: Re: snd_pcm_rewind() weirdness
Date: Thu, 24 Apr 2008 02:34:34 +0200 [thread overview]
Message-ID: <20080424003434.GA27865@tango.0pointer.de> (raw)
In-Reply-To: <Pine.LNX.4.61.0804210855520.7882@tm8103.perex-int.cz>
On Mon, 21.04.08 08:58, Jaroslav Kysela (perex@perex.cz) wrote:
>
> On Sun, 20 Apr 2008, Lennart Poettering wrote:
>
> > Hey!
> >
> > On ALSA 1.0.16 with the HDA driver I am experiencing some weird things
> > with snd_pcm_rewind() which I think are the result of a kernel bug,
> > but I am not sure.
>
> What alsa-lib plugins are on path? It looks like a rate plugin issue. Post
> also snd_pcm_dump() output. Driver does not do any alignment.
It's front:0. I don't think the rate plugin is used.
Device is being opened with
SND_PCM_NO_AUTO_RESAMPLE|SND_PCM_NO_AUTO_CHANNELS|SND_PCM_NO_AUTO_FORMAT
and snd_pcm_hw_params_set_rate_resample(..., 0).
That should get me only softvol, right?
The output of snd_pcm_dump() is here (please ignore the "D:
alsa-util.c" prefix)
<snip>
D: alsa-util.c: Soft volume PCM
D: alsa-util.c: Control: PCM Playback Volume
D: alsa-util.c: min_dB: -51
D: alsa-util.c: max_dB: 0
D: alsa-util.c: resolution: 256
D: alsa-util.c: Its setup is:
D: alsa-util.c: stream : PLAYBACK
D: alsa-util.c: access : MMAP_INTERLEAVED
D: alsa-util.c: format : S16_LE
D: alsa-util.c: subformat : STD
D: alsa-util.c: channels : 2
D: alsa-util.c: rate : 44100
D: alsa-util.c: exact rate : 44100 (44100/1)
D: alsa-util.c: msbits : 16
D: alsa-util.c: buffer_size : 16384
D: alsa-util.c: period_size : 8192
D: alsa-util.c: period_time : 185759
D: alsa-util.c: tstamp_mode : NONE
D: alsa-util.c: period_step : 1
D: alsa-util.c: avail_min : 31001
D: alsa-util.c: start_threshold : -1
D: alsa-util.c: stop_threshold : -1
D: alsa-util.c: silence_threshold: 0
D: alsa-util.c: silence_size : 0
D: alsa-util.c: boundary : 4611686018427387904
D: alsa-util.c: Slave: Hardware PCM card 4 'HDA Intel' device 0 subdevice 0
D: alsa-util.c: Its setup is:
D: alsa-util.c: stream : PLAYBACK
D: alsa-util.c: access : MMAP_INTERLEAVED
D: alsa-util.c: format : S16_LE
D: alsa-util.c: subformat : STD
D: alsa-util.c: channels : 2
D: alsa-util.c: rate : 44100
D: alsa-util.c: exact rate : 44100 (44100/1)
D: alsa-util.c: msbits : 16
D: alsa-util.c: buffer_size : 16384
D: alsa-util.c: period_size : 8192
D: alsa-util.c: period_time : 185759
D: alsa-util.c: tstamp_mode : NONE
D: alsa-util.c: period_step : 1
D: alsa-util.c: avail_min : 31001
D: alsa-util.c: start_threshold : -1
D: alsa-util.c: stop_threshold : -1
D: alsa-util.c: silence_threshold: 0
D: alsa-util.c: silence_size : 0
D: alsa-util.c: boundary : 4611686018427387904
</snip>
Lennart
--
Lennart Poettering Red Hat, Inc.
lennart [at] poettering [dot] net ICQ# 11060553
http://0pointer.net/lennart/ GnuPG 0x1A015CC4
next prev parent reply other threads:[~2008-04-24 0:34 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-19 23:37 snd_pcm_rewind() weirdness Lennart Poettering
2008-04-21 6:58 ` Jaroslav Kysela
2008-04-24 0:34 ` Lennart Poettering [this message]
2008-04-24 0:38 ` Lennart Poettering
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