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From: Tom Watson <sdc695@yahoo.com>
To: alsa development <alsa-devel@lists.sourceforge.net>
Subject: I thought it would simple....
Date: Tue, 22 Jul 2003 23:54:49 -0700 (PDT)	[thread overview]
Message-ID: <20030723065449.40812.qmail@web21508.mail.yahoo.com> (raw)

I am attempting to write a "simple" audio playback program.  Well, I
thought it would be, but...
Somehow (thru strace) the 'snd_pcm_writei' call goes and eventually
does a system 'poll' call, but it doesn't return indicating that a
write is OK to do.
I've used similar parameters in 'aplay' and I see that it works.

The basis of the program I'm writing is the one described in _A
Tutorial on Using the ALSA API_
(http://equalarea.com/paul/alsa-audio.html), section entitled "A
Minimal Playback Program".

One thing I've noted:  Some of the data printed out by "snd_pcm_dump"
is different between my program and 'aplay'.  I suspect that there is a
clue somewhere, but what is the "magic"??

If necessary, I can provide the 'strace' or the output from
'snd_pcm_dump', but in the interest of brevity...

Any "great clue" would be appreciated.

Thanks.

=====
-- 
Tom Watson
tsw@johana.com

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             reply	other threads:[~2003-07-23  6:54 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-07-23  6:54 Tom Watson [this message]
2003-07-23 11:07 ` I thought it would simple Carlo Wood
2003-07-24  5:03   ` Tom Watson
2003-07-24 13:48     ` Takashi Iwai
2003-08-11 21:30       ` Tom Watson

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