docs: xrefs more api around GstStateChange and GstStateChangeReturn.
docs: xrefs more api around GstStateChange and GstStateChangeReturn.

drothlis/gstreamer,Lachann/gstreamer,lovebug356/gstreamer,collects/gstreamer,centricular/gstreamer,magcius/gstreamer,ensonic/gstreamer,collects/gstreamer,jpakkane/gstreamer,justinjoy/gstreamer,collects/gstreamer,ensonic/gstreamer,cfoch/gstreamer,krichter722/gstreamer,jpxiong/gstreamer,krieger-od/gstreamer,jpakkane/gstreamer,lovebug356/gstreamer,drothlis/gstreamer,drothlis/gstreamer,drothlis/gstreamer,Distrotech/gstreamer,krieger-od/gstreamer,surround-io/gstreamer,shelsonjava/gstreamer,ylatuya/gstreamer,cfoch/gstreamer,lovebug356/gstreamer,krichter722/gstreamer,krichter722/gstreamer,ahmedammar/platform_external_gst_gstreamer,collects/gstreamer,jpakkane/gstreamer,Lachann/gstreamer,Distrotech/gstreamer,ensonic/gstreamer,surround-io/gstreamer,StreamUtils/gstreamer,krieger-od/gstreamer,mparis/gstreamer,justinjoy/gstreamer,justinjoy/gstreamer,lubosz/gstreamer,lovebug356/gstreamer,ahmedammar/platform_external_gst_gstreamer,cfoch/gstreamer,lubosz/gstreamer,jpxiong/gstreamer,jpakkane/gstreamer,mparis/gstreamer,magcius/gstreamer,Lachann/gstreamer,shelsonjava/gstreamer,shelsonjava/gstreamer,shelsonjava/gstreamer,ylatuya/gstreamer,Distrotech/gstreamer,krichter722/gstreamer,cfoch/gstreamer,cablelabs/gstreamer,krieger-od/gstreamer,cablelabs/gstreamer,ylatuya/gstreamer,krieger-od/gstreamer,cablelabs/gstreamer,mparis/gstreamer,ensonic/gstreamer,lovebug356/gstreamer,justinjoy/gstreamer,ahmedammar/platform_external_gst_gstreamer,cablelabs/gstreamer,surround-io/gstreamer,centricular/gstreamer,lubosz/gstreamer,jpxiong/gstreamer,collects/gstreamer,Lachann/gstreamer,shelsonjava/gstreamer,lubosz/gstreamer,jpxiong/gstreamer,jpakkane/gstreamer,surround-io/gstreamer,StreamUtils/gstreamer,mparis/gstreamer,Distrotech/gstreamer,ahmedammar/platform_external_gst_gstreamer,centricular/gstreamer,mparis/gstreamer,ensonic/gstreamer,justinjoy/gstreamer,drothlis/gstreamer,centricular/gstreamer,krichter722/gstreamer,ylatuya/gstreamer,StreamUtils/gstreamer,StreamUtils/gstreamer,lubosz/gstreamer,StreamUtils/gstreamer,Lachann/gstreamer,Distrotech/gstreamer,jpxiong/gstreamer,centricular/gstreamer,cablelabs/gstreamer,magcius/gstreamer,cfoch/gstreamer,ylatuya/gstreamer,magcius/gstreamer,magcius/gstreamer,surround-io/gstreamer,ahmedammar/platform_external_gst_gstreamer