pub unsafe extern "C" fn gst_codec_utils_opus_parse_header(
header: *mut GstBuffer,
rate: *mut u32,
channels: *mut u8,
channel_mapping_family: *mut u8,
stream_count: *mut u8,
coupled_count: *mut u8,
channel_mapping: *mut [u8; 256],
pre_skip: *mut u16,
output_gain: *mut i16
) -> gboolean