On Tue, 23.02.10 11:08, Clemens Ladisch (clemens@xxxxxxxxxx) wrote: > > Lennart Poettering wrote: > > On Sun, 21.02.10 12:01, Raymond Yau (superquad.vortex2@xxxxxxxxx) 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 _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
