snd_ctl_make_virtual_master — Create a virtual master control
struct snd_kcontrol * snd_ctl_make_virtual_master ( | char * name, |
const unsigned int * tlv); |
namename string of the control element to create
tlvoptional TLV int array for dB information
Creates a virtual matster control with the given name string. Returns the created control element, or NULL for errors (ENOMEM).
After creating a vmaster element, you can add the slave controls
via snd_ctl_add_slave or snd_ctl_add_slave_uncached.
The optional argument tlv can be used to specify the TLV information
for dB scale of the master control. It should be a single element
with #SNDRV_CTL_TLVT_DB_SCALE type, and should be the max 0dB.