lfocontrolsource: cleanups and fix triangle calculations
lfocontrolsource: cleanups and fix triangle calculations

collects/gstreamer,lovebug356/gstreamer,cablelabs/gstreamer,Lachann/gstreamer,cfoch/gstreamer,lubosz/gstreamer,justinjoy/gstreamer,surround-io/gstreamer,collects/gstreamer,shelsonjava/gstreamer,centricular/gstreamer,krichter722/gstreamer,jpxiong/gstreamer,jpxiong/gstreamer,Lachann/gstreamer,centricular/gstreamer,jpakkane/gstreamer,ensonic/gstreamer,jpakkane/gstreamer,krichter722/gstreamer,Lachann/gstreamer,cfoch/gstreamer,lubosz/gstreamer,jpakkane/gstreamer,shelsonjava/gstreamer,jpxiong/gstreamer,cfoch/gstreamer,lubosz/gstreamer,lovebug356/gstreamer,cfoch/gstreamer,jpxiong/gstreamer,shelsonjava/gstreamer,StreamUtils/gstreamer,justinjoy/gstreamer,surround-io/gstreamer,mparis/gstreamer,cablelabs/gstreamer,StreamUtils/gstreamer,mparis/gstreamer,ensonic/gstreamer,collects/gstreamer,Lachann/gstreamer,centricular/gstreamer,mparis/gstreamer,lovebug356/gstreamer,krieger-od/gstreamer,mparis/gstreamer,cablelabs/gstreamer,lovebug356/gstreamer,surround-io/gstreamer,collects/gstreamer,justinjoy/gstreamer,krichter722/gstreamer,krichter722/gstreamer,centricular/gstreamer,jpakkane/gstreamer,krieger-od/gstreamer,jpxiong/gstreamer,cablelabs/gstreamer,lovebug356/gstreamer,ensonic/gstreamer,krieger-od/gstreamer,mparis/gstreamer,StreamUtils/gstreamer,collects/gstreamer,ensonic/gstreamer,centricular/gstreamer,krieger-od/gstreamer,surround-io/gstreamer,krieger-od/gstreamer,cablelabs/gstreamer,ensonic/gstreamer,cfoch/gstreamer,lubosz/gstreamer,jpakkane/gstreamer,StreamUtils/gstreamer,Lachann/gstreamer,StreamUtils/gstreamer,lubosz/gstreamer,shelsonjava/gstreamer,surround-io/gstreamer,justinjoy/gstreamer,justinjoy/gstreamer,krichter722/gstreamer,shelsonjava/gstreamer