ece6426810
The old code was using gst_caps_normalize() and was generally overly complex. Simplify by picking sample rate and number of channels from upstream and the sample format from the allowed caps. If the format caps is a list of strins, just pick the first one. And if the srcpad isn't linked yet, use the default format (S16). https://bugzilla.gnome.org/show_bug.cgi?id=740195