Reasons:
-As far as i know, all systems can use the non-MIXER_IS_ALSA way to get the values
-This code shows wrong mixer values
-You can't define MIXER_IS_ALSA with the current cmake configuration
-In the current state this code is incorrect c++ and does not compile (altough it's
probably correct c, i didn't check that)
The 3 last reasons can be fixed, but i'm not in favor of doing that because of the 1st reason
