GF_Err tx3g_box_size(GF_Box *s)
{
	/*base + this  + box + style*/
	s->size += 18 + GPP_BOX_SIZE + GPP_STYLE_SIZE;
	return GF_OK;
}
GF_Err tx3g_box_size(GF_Box *s)
{
	 
	s->size += 18 + GPP_BOX_SIZE + GPP_STYLE_SIZE;
	return GF_OK;
}