First part of a new mono for audio filter 2. You can select the channel you...

First part of a new mono for audio filter 2. You can select the channel you want to hear all other channels are silenced.

TODO:
- stereo_to_mono downmix

modules/audio_filter/converter/Modules.am

@@ -15,3 +15,4 @@ SOURCES_s8tofloat32 = s8tofloat32.c
 SOURCES_u8tofixed32 = u8tofixed32.c
 SOURCES_u8tofloat32 = u8tofloat32.c
 SOURCES_mpgatofixed32 = mpgatofixed32.c
+SOURCES_mono = mono.c