From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lennart Poettering Subject: Re: Verifying mixer dB data/Invalid dB data from USB cards, especially Aureon 5.1 MkII Date: Tue, 23 Feb 2010 23:32:34 +0100 Message-ID: <20100223223234.GB5313@tango.0pointer.de> References: <4f3252891002171748tdcaa87n4d11d9880c0043e3@mail.gmail.com> <20100218023742.GC23637@tango.0pointer.de> <4f3252891002172215j7b85313ci3626a1bdad5c040c@mail.gmail.com> <20100218181322.GB5606@tango.0pointer.de> <4f3252891002190257u608073c3l48f2251d8a6458ee@mail.gmail.com> <20100219151328.GC25873@tango.0pointer.de> <4f3252891002202001gb6df8cg6c023c52e7d8394a@mail.gmail.com> <20100221192951.GD30380@tango.0pointer.de> <4B83A912.1050501@ladisch.de> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from tango.0pointer.de (tango.0pointer.de [85.214.72.216]) by alsa0.perex.cz (Postfix) with ESMTP id AC93E1037EE for ; Tue, 23 Feb 2010 23:32:59 +0100 (CET) Content-Disposition: inline In-Reply-To: <4B83A912.1050501@ladisch.de> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: alsa-devel-bounces@alsa-project.org Errors-To: alsa-devel-bounces@alsa-project.org To: Clemens Ladisch Cc: alsa-devel@alsa-project.org List-Id: alsa-devel@alsa-project.org On Tue, 23.02.10 11:08, Clemens Ladisch (clemens@ladisch.de) wrote: > > Lennart Poettering wrote: > > On Sun, 21.02.10 12:01, Raymond Yau (superquad.vortex2@gmail.com) wrote: > > > However Simple Mixer API cannot know the subdevice number , you have to use > > > control API ( the lower level API used by Simple Mixer API ) > > > > Unfortunately there is no way from the simple mixer to the lower level > > mixer. > > >From the check_unplugged function in alsa-utils/alsamixer/mixer_widget.c: > > err = snd_mixer_get_hctl(mixer, mixer_device_name, &hctl); > if (err >= 0) > ctl = snd_hctl_ctl(hctl); But that still doesn't give me a hint which snd_ctl_eleme_t belongs to which snd_mixer_eleme_t, does it? > > It would be great if the smixer would include some API that gives me a > > hint to which device/subdevice a specific snd_mixer_elem_t belongs to. > > Often, there is no 1:1 correspondence between mixer elements and PCM > devices. Only mixer controls with interface PCM (not MIXER) have (sub-) > device numbers, and at the moment this is used only for controls that > are associated with the streams of hardware-mixing-capable cards. Which are not that many, right? Not HDA at least? > Getting information about the mixer layout (like the nodes reported by > HDA and USB devices) is on the TODO list; the only reason it isn't being > implemented is lack of time. Would be great to have that. Lennart -- Lennart Poettering Red Hat, Inc. lennart [at] poettering [dot] net http://0pointer.net/lennart/ GnuPG 0x1A015CC4