From: "Jirka Hanika" <HANIKA@ksvi.mff.cuni.cz>
To: linux-sound@vger.kernel.org
Subject: SNDCTL_DSP_BUSY
Date: Fri, 22 Oct 1999 21:22:44 +0000 [thread overview]
Message-ID: <marc-linux-sound-94063085304036@msgid-missing> (raw)
Hi,
a programming question.
I need an ioctl or some other API to find out whether the sound card
has completely processed the buffers. Something exactly like
ioctl(SNDCTL_DSP_SYNC), but an asynchronous breed.
I have looked at audio.c and there is no such ioctl.
The only solution known to me is to write the neutral sample (silence)
asynchronously to the sound card until a bufferfarmfull bytes is
written, then ioctl(SNDCTL_DSP_RESET). This is however ugly as
12-bit FAT.
In case there is no better approach available, what would you think of a
new ioctl (say SNDCTL_DSP_BUSY)?
Jirka
next reply other threads:[~1999-10-22 21:22 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
1999-10-22 21:22 Jirka Hanika [this message]
1999-10-22 23:17 ` SNDCTL_DSP_BUSY Paco
1999-10-25 10:07 ` SNDCTL_DSP_BUSY Thomas Sailer
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