From: Lee Revell <rlrevell@joe-job.com>
To: Takashi Iwai <tiwai@suse.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Linux Kernel list <linux-kernel@vger.kernel.org>
Subject: Re: Mac mini sound woes
Date: Tue, 29 Mar 2005 15:11:37 -0500 [thread overview]
Message-ID: <1112127097.5141.1.camel@mindpipe> (raw)
In-Reply-To: <s5hu0mugsg2.wl@alsa2.suse.de>
On Tue, 2005-03-29 at 21:31 +0200, Takashi Iwai wrote:
> Well I don't remember the discussion thread on alsa-devel about this,
> but it's a good idea that alsa-lib checks the capability of hw-mixing
> and apples dmix only if necessary. (In the case of softvol, it can
> check the existence of hw control by itself, though.)
>
> Currently, dmix is enabled per driver-type base. That is, dmix is set
> to default in each driver's configuration which is known to have no hw
> mixing functionality.
It was not discussed at length.
Anyway, I think you can detect hardware mixing support comparing the
number of substreams to the numebr of streams for a device. If the
ratio is greater than 1, hardware mixing is supported.
Lee
next prev parent reply other threads:[~2005-03-29 20:15 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-03-27 23:42 Mac mini sound woes Benjamin Herrenschmidt
2005-03-28 1:42 ` Andrea Arcangeli
2005-03-28 2:34 ` Benjamin Herrenschmidt
2005-03-29 3:36 ` Lee Revell
2005-03-29 3:41 ` Benjamin Herrenschmidt
2005-03-29 7:47 ` Marcin Dalecki
2005-03-29 8:18 ` Benjamin Herrenschmidt
2005-03-29 9:22 ` Marcin Dalecki
2005-03-29 10:22 ` Takashi Iwai
2005-03-30 1:45 ` Marcin Dalecki
2005-03-30 2:08 ` Lee Revell
2005-03-30 4:14 ` Lee Revell
2005-03-30 5:15 ` Steven Rostedt
2005-03-29 22:13 ` Lee Revell
2005-03-29 23:25 ` Chris Friesen
2005-03-29 23:39 ` Benjamin Herrenschmidt
2005-03-30 1:48 ` Marcin Dalecki
2005-03-30 5:42 ` Lee Revell
2005-03-30 1:45 ` Marcin Dalecki
2005-03-29 10:02 ` Takashi Iwai
2005-03-29 11:04 ` Benjamin Herrenschmidt
2005-03-29 12:12 ` Takashi Iwai
2005-03-29 19:05 ` Lee Revell
2005-03-29 19:31 ` Takashi Iwai
2005-03-29 20:11 ` Lee Revell [this message]
2005-03-29 22:03 ` Benjamin Herrenschmidt
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