From: Lee Revell <rlrevell@joe-job.com>
To: Florian Schmidt <mista.tapas@gmx.net>
Cc: Ingo Molnar <mingo@elte.hu>,
Paul Davis <paul@linuxaudiosystems.com>,
jackit-devel@lists.sourceforge.net,
alsa-devel <alsa-devel@lists.sourceforge.net>
Subject: Re: irq handler top half timestamps
Date: Thu, 09 Dec 2004 16:10:28 -0500 [thread overview]
Message-ID: <1102626628.21688.11.camel@krustophenia.net> (raw)
In-Reply-To: <20041209220741.7562b6a0@mango.fruits.de>
On Thu, 2004-12-09 at 22:07 +0100, Florian Schmidt wrote:
> On Thu, 9 Dec 2004 19:33:42 +0100
> Ingo Molnar <mingo@elte.hu> wrote:
>
> > cleanest would be to somehow make this part of ALSA, just like xrun info
> > is part of ALSA (the two are related as well). But there are other
> > details too i guess: a single audio device can have separate interrupts
> > (for playback and capture?) - in that case which one should ALSA return?
>
> Well, possibly ALSA could keep the timestamps for each substream around?
> And the ioctl should get parametrized with the substream # so it returns
> the most current irq timestamp for the selected substream.
>
Doesn't ALSA already do this? IIRC when you call snd_pcm_period_elapsed
in the ALSA irq handler the PCM stream is timestamped.
Lee
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next parent reply other threads:[~2004-12-09 21:10 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20041209180706.GA11397@elte.hu>
[not found] ` <200412091819.iB9IJiLX013123@localhost.localdomain>
[not found] ` <20041209183342.GB13132@elte.hu>
[not found] ` <20041209220741.7562b6a0@mango.fruits.de>
2004-12-09 21:10 ` Lee Revell [this message]
2004-12-10 1:35 ` Re: [Jackit-devel] irq handler top half timestamps Florian Schmidt
2004-12-10 7:52 ` [Alsa-devel] " Jaroslav Kysela
2004-12-10 17:23 ` Florian Schmidt
2004-12-10 17:17 ` Re: [Jackit-devel] " Paul Davis
2004-12-10 17:54 ` [Alsa-devel] " Florian Schmidt
2004-12-10 19:00 ` Re: [Jackit-devel] " Lee Revell
2004-12-10 20:51 ` Paul Davis
2004-12-10 21:01 ` Lee Revell
2004-12-11 0:56 ` Florian Schmidt
2004-12-11 2:22 ` Florian Schmidt
2004-12-15 23:32 ` [Alsa-devel] " Florian Schmidt
2004-12-16 9:18 ` Ingo Molnar
2004-12-16 16:33 ` tapas
2004-12-16 18:35 ` Re: [Jackit-devel] " Lee Revell
2004-12-19 23:45 ` Florian Schmidt
2004-12-19 23:38 ` [Alsa-devel] " Lee Revell
2004-12-20 15:08 ` Re: [Jackit-devel] " Florian Schmidt
2004-12-21 1:30 ` [Alsa-devel] " Florian Schmidt
2004-12-21 1:49 ` Re: [Jackit-devel] " Lee Revell
2004-12-11 3:17 ` [Alsa-devel] " Lee Revell
2004-12-20 10:57 ` Re: [Jackit-devel] " Martijn Sipkema
2004-12-20 11:10 ` Clemens Ladisch
2004-12-20 11:50 ` Martijn Sipkema
2004-12-20 11:52 ` [Alsa-devel] " James Courtier-Dutton
2004-12-10 7:41 ` Jaroslav Kysela
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