From: Lee Revell <rlrevell@joe-job.com>
To: Hanbiao Wang <hbwang@lecs.cs.ucla.edu>
Cc: alsa-devel <alsa-devel@lists.sourceforge.net>
Subject: Re: what is trigger time?
Date: Fri, 08 Oct 2004 00:08:47 -0400 [thread overview]
Message-ID: <1097208527.9372.50.camel@krustophenia.net> (raw)
In-Reply-To: <Pine.LNX.4.58.0410071801160.18124@concorde.cs.ucla.edu>
On Thu, 2004-10-07 at 21:07, Hanbiao Wang wrote:
> Hi, All
> According to the ALSA documentation, the following two functions
> snd_pcm_status_get_trigger_tstamp()
> snd_pcm_status_get_trigger_htstamp()
> are suppose to get the "trigger time". However, I can not find any
> documents that explains or define the meaning of the "trigger time".
> Is that the time when a whole period of samples in the buffer is ready to
> be read in? Could somebody please give me a hint? Thanks a lot.
>
I don't have the source in front of me but I would expect this to be the
time when the ALSA middle layer executed the trigger callback. This
happens when a PCM is stopped, started, or paused.
Lee
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next prev parent reply other threads:[~2004-10-08 4:08 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-08 1:07 what is trigger time? Hanbiao Wang
2004-10-08 4:08 ` Lee Revell [this message]
2004-10-08 17:16 ` Hanbiao Wang
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