Function gstreamer_rtp_sys::gst_rtcp_packet_xr_get_voip_quality_metrics

pub unsafe extern "C" fn gst_rtcp_packet_xr_get_voip_quality_metrics(
    packet: *mut GstRTCPPacket, 
    r_factor: *mut u8, 
    ext_r_factor: *mut u8, 
    mos_lq: *mut u8, 
    mos_cq: *mut u8
) -> gboolean

This is supported on crate feature v1_16 only.