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SND_CTL_MAKE_VIRTUAL(9) Control/Mixer API SND_CTL_MAKE_VIRTUAL(9)

NAME

snd_ctl_make_virtual_master - Create a virtual master control

SYNOPSIS

struct snd_kcontrol * snd_ctl_make_virtual_master(char * name, const unsigned int * tlv);

ARGUMENTS

name
name string of the control element to create
tlv
optional TLV int array for dB information

DESCRIPTION

Creates a virtual master control with the given name string.
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, #SNDRV_CTL_TLV_DB_MINMAX or #SNDRV_CTL_TLVT_DB_MINMAX_MUTE type, and should be the max 0dB.

RETURN

The created control element, or NULL for errors (ENOMEM).

COPYRIGHT

January 2017 Kernel Hackers Manual 4.8.