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From: Takashi Iwai <tiwai@suse.de>
To: Tim Pushor <timp@crossthread.com>
Cc: alsa-devel@alsa-project.org
Subject: Re: period time in async handler
Date: Wed, 11 Jun 2008 18:31:49 +0200	[thread overview]
Message-ID: <s5h63sg2aru.wl%tiwai@suse.de> (raw)
In-Reply-To: <484F39E0.2010205@crossthread.com>

At Tue, 10 Jun 2008 20:35:12 -0600,
Tim Pushor wrote:
> 
> Hi Friends,
> 
> I have a need to have an audio player kick off things at various points 
> of time through playback of an audio file. I'm trying to hack aplay as a 
> proof of concept.
> 
> If I understand correctly, the asynchronous handler seems to do what I 
> want. I hacked in a handler to aplay and it works, but not quite like 
> how I expected.

Oh, forget about async handler.  It's a horrible hack, and in
principle, never guaranteed to work.

We really need to put DONT_USE tag to async handler APIs...


Takashi

> I counted the number of times that the handler got called, and thought 
> that if I multiplied that by the period time that I'd end up with the 
> total audio length but that doesn't seem to be the case. I was under the 
> assumption that the handler was called once per period.
> 
> I must not understand the relationship of the asynchronous handler and 
> period_time. Does this make sense? Am I going about this all wrong?
> 
> Thanks,
> Tim
> _______________________________________________
> Alsa-devel mailing list
> Alsa-devel@alsa-project.org
> http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
> 

      reply	other threads:[~2008-06-11 16:31 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-06-11  2:35 period time in async handler Tim Pushor
2008-06-11 16:31 ` Takashi Iwai [this message]

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