2010/2/24 Clemens Ladisch <clemens@xxxxxxxxxx> > Lennart Poettering wrote: > > On Tue, 23.02.10 11:08, Clemens Ladisch (clemens@xxxxxxxxxx) wrote: > > > Lennart Poettering wrote: > > > > 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? > > Not really; the point of the simple mixer interface is to abstract away > some of the ctl naming conventions. > > > > > 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? > > No, most recent hardware was designed for software mixing. Only the > snd-emu10k1, snd-via82xx and snd-ymfpci drivers implement such controls. > > > Regards, > Clemens > > The current implementation of HDA capturing subdevices are almost as same as those playback subdevices of hardware mixing sound card each subdevice support the same format , rate , channels , the number of input sources are also the same The only difference is the type IFACE_MIXER and IFACE_PCM since using IFACE_PCM will break most mixer application _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
