GF_Err grpi_box_write(GF_Box *s, GF_BitStream *bs)
{
	GF_Err e;
	u16 gid_len;
	GF_OMADRMGroupIDBox *ptr = (GF_OMADRMGroupIDBox *)s;
	if (!s) return GF_BAD_PARAM;
	e = gf_isom_full_box_write(s, bs);
	if (e) return e;
	gid_len = ptr->GroupID ? (u16) strlen(ptr->GroupID) : 0;
	gf_bs_write_u16(bs, gid_len);
	gf_bs_write_u8(bs, ptr->GKEncryptionMethod);
	gf_bs_write_u16(bs, ptr->GKLength);
	gf_bs_write_data(bs, ptr->GroupID, gid_len);
	gf_bs_write_data(bs, ptr->GroupKey, ptr->GKLength);
	return GF_OK;
}
GF_Err grpi_box_write(GF_Box *s, GF_BitStream *bs)
{
	GF_Err e;
	u16 gid_len;
	GF_OMADRMGroupIDBox *ptr = (GF_OMADRMGroupIDBox *)s;
	if (!s) return GF_BAD_PARAM;
	e = gf_isom_full_box_write(s, bs);
	if (e) return e;
	gid_len = ptr->GroupID ? (u16) strlen(ptr->GroupID) : 0;
	gf_bs_write_u16(bs, gid_len);
	gf_bs_write_u8(bs, ptr->GKEncryptionMethod);
	gf_bs_write_u16(bs, ptr->GKLength);
	gf_bs_write_data(bs, ptr->GroupID, gid_len);
	gf_bs_write_data(bs, ptr->GroupKey, ptr->GKLength);
	return GF_OK;
}