public void jpeg_write_m_header(int marker, int datalen)
{
if (m_next_scanline != 0 || (m_global_state != JpegState.CSTATE_SCANNING && m_global_state != JpegState.CSTATE_RAW_OK && m_global_state != JpegState.CSTATE_WRCOEFS))
ERREXIT(J_MESSAGE_CODE.JERR_BAD_STATE, (int)m_global_state);
m_marker.write_marker_header(marker, datalen);
}