Function wmv2_decoder_decode 

#[unsafe(no_mangle)]
pub extern "C" fn wmv2_decoder_decode(
    handle: *mut c_void,
    payload: *const u8,
    payload_len: usize,
    is_key_frame: i32,
) -> i32

Decode one assembled WMV2 frame payload.

Returns: 1 = decoded frame available 0 = no frame (header not found) -1 = invalid arguments -2 = decode error