private void emit_pseudo_sos()
{
emit_marker(JPEG_MARKER.SOS);
emit_2bytes(2 + 1 + 3); /* length */
emit_byte(0); /* Ns */
emit_byte(0); /* Ss */
emit_byte(m_cinfo.block_size * m_cinfo.block_size - 1); /* Se */
emit_byte(0); /* Ah/Al */
}