From: Clemens Ladisch <clemens@ladisch.de>
To: Daniel Mack <daniel@caiaq.de>
Cc: tiwai@suse.de, alsa-devel@alsa-project.org
Subject: Re: [PATCH 2/3] ALSA: snd-usb-caiaq: set up internal sample pointer positions in trigger callback
Date: Fri, 10 Sep 2010 09:27:48 +0200 [thread overview]
Message-ID: <4C89DDF4.8030200@ladisch.de> (raw)
In-Reply-To: <1284090901-4533-2-git-send-email-daniel@caiaq.de>
Daniel Mack wrote:
> Calling prepare() on a stream which is already active
... would be a bug; snd_pcm_pre_prepare() in sound/core/pcm_native.c
should prevent this. Why do you feel the need for this patch?
> shouldn't touch the sample pointer positions. This code belongs into
> the trigger callback, so move it there.
The trigger callback should execute as fast as possible; any
initialization that isn't need to directly start the stream should go
into the prepare callback.
Regards,
Clemens
next prev parent reply other threads:[~2010-09-10 7:27 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-10 3:54 [PATCH 1/3] ALSA: snd-usb-caiaq: drop version number Daniel Mack
2010-09-10 3:55 ` [PATCH 2/3] ALSA: snd-usb-caiaq: set up internal sample pointer positions in trigger callback Daniel Mack
2010-09-10 7:27 ` Clemens Ladisch [this message]
2010-09-10 8:10 ` Daniel Mack
2010-09-10 3:55 ` [PATCH 3/3] ALSA: snd-usb-caiaq: Add support for Traktor Kontrol S4 Daniel Mack
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