odf_command.c

一个用于智能手机的多媒体库适合S60 WinCE的跨平台开发库

	if (!desc) return GF_OK;

	switch (desc->tag) {
	case GF_ODF_ESD_TAG:
	case GF_ODF_ESD_REF_TAG:
		return gf_list_add(esdUp->ESDescriptors, desc);

	default:
		gf_odf_delete_descriptor(desc);
		return GF_OK;
	}
}

GF_Err gf_odf_read_esd_update(GF_BitStream *bs, GF_ESDUpdate *esdUp, u32 gf_odf_size_command)
{
	GF_Descriptor *tmp;
	u32 tmpSize = 0, nbBits = 0;
	GF_Err e = GF_OK;
	if (! esdUp) return GF_BAD_PARAM;

	esdUp->ODID = gf_bs_read_int(bs, 10);
	nbBits += 10;
	//very tricky, we're at the bit level here...
	while (1) {
		e = gf_odf_parse_descriptor(bs, &tmp, &tmpSize);
		if (e) return e;
		e = AddToESDUpdate(esdUp, tmp);
		if (e) return e;
		nbBits += ( tmpSize + gf_odf_size_field_size(tmpSize) ) * 8;
		//our com is aligned, so nbBits is between (gf_odf_size_command-1)*8 and gf_odf_size_command*8
		if ( ( (nbBits >(gf_odf_size_command-1)*8) && (nbBits <= gf_odf_size_command * 8)) 
			|| (nbBits > gf_odf_size_command*8) ) {	//this one is a security break
			break;
		}
	}
	if (nbBits > gf_odf_size_command * 8) return GF_ODF_INVALID_COMMAND;
	//Align our bitstream
	nbBits += gf_bs_align(bs);
	if (nbBits != gf_odf_size_command *8) return GF_ODF_INVALID_COMMAND;
	return e;
}



GF_Err gf_odf_size_esd_update(GF_ESDUpdate *esdUp, u32 *outSize)
{
	u32 i, BitSize, tmpSize;
	GF_Descriptor *tmp;
	if (!esdUp) return GF_BAD_PARAM;

	*outSize = 0;
	BitSize = 10;
	i=0;
	while ((tmp = (GF_Descriptor *)gf_list_enum(esdUp->ESDescriptors, &i))) {
		gf_odf_size_descriptor(tmp, &tmpSize);
		BitSize += ( tmpSize + gf_odf_size_field_size(tmpSize) ) * 8;
	}
	while ((s32) BitSize > 0) {
		BitSize -= 8;
		*outSize += 1;
	}
	return GF_OK;
}
GF_Err gf_odf_write_esd_update(GF_BitStream *bs, GF_ESDUpdate *esdUp)
{
	GF_Descriptor *tmp;
	GF_Err e;
	u32 size, i;
	if (! esdUp) return GF_BAD_PARAM;

	e = gf_odf_size_esd_update(esdUp, &size);
	if (e) return e;
	e = gf_odf_write_base_descriptor(bs, esdUp->tag, size);
	if (e) return e;

	gf_bs_write_int(bs, esdUp->ODID, 10);
	i=0;
	while ((tmp = (GF_Descriptor *)gf_list_enum(esdUp->ESDescriptors, &i))) {
		e = gf_odf_write_descriptor(bs, tmp);
		if (e) return e;
	}
	//OD commands are aligned
	gf_bs_align(bs);
	return GF_OK;
}


GF_ODCom *gf_odf_new_esd_remove()
{
	GF_ESDRemove *newCom = (GF_ESDRemove *) malloc(sizeof(GF_ESDRemove));
	if (!newCom) return NULL;
	newCom->NbESDs = 0;
	newCom->ES_ID = NULL;
	newCom->tag = GF_ODF_ESD_REMOVE_TAG;
	return (GF_ODCom *)newCom;
}

GF_Err gf_odf_del_esd_remove(GF_ESDRemove *ESDRemove)
{
	if (! ESDRemove) return GF_BAD_PARAM;
	if (ESDRemove->ES_ID) free(ESDRemove->ES_ID);
	free(ESDRemove);
	return GF_OK;
}


GF_Err gf_odf_read_esd_remove(GF_BitStream *bs, GF_ESDRemove *esdRem, u32 gf_odf_size_command)
{
	u32 i = 0, aligned, nbBits;
	if (! esdRem) return GF_BAD_PARAM;

	esdRem->ODID = gf_bs_read_int(bs, 10);
	aligned = gf_bs_read_int(bs, 6);		//aligned

	//we have gf_odf_size_command - 2 bytes left, and this is our ES_ID[1...255]
	//this works because OD commands are aligned
	if (gf_odf_size_command < 2) return GF_ODF_INVALID_DESCRIPTOR;
	if (gf_odf_size_command == 2) {
		esdRem->NbESDs = 0;
		esdRem->ES_ID = NULL;
		return GF_OK;
	}
	esdRem->NbESDs = (gf_odf_size_command - 2) / 2;
	esdRem->ES_ID = (u16 *) malloc(sizeof(u16) * esdRem->NbESDs);
	if (! esdRem->ES_ID) return GF_OUT_OF_MEM;
	for (i = 0; i < esdRem->NbESDs ; i++) {
		esdRem->ES_ID[i] = gf_bs_read_int(bs, 16);
	}
	//OD commands are aligned (but we should already be aligned....
	nbBits = gf_bs_align(bs);
	return GF_OK;
}

GF_Err gf_odf_size_esd_remove(GF_ESDRemove *esdRem, u32 *outSize)
{
	if (!esdRem) return GF_BAD_PARAM;
	*outSize = 2 + 2 * esdRem->NbESDs;
	return GF_OK;
}
GF_Err gf_odf_write_esd_remove(GF_BitStream *bs, GF_ESDRemove *esdRem)
{
	GF_Err e;
	u32 size, i;
	if (! esdRem) return GF_BAD_PARAM;

	e = gf_odf_size_esd_remove(esdRem, &size);
	if (e) return e;
	e = gf_odf_write_base_descriptor(bs, esdRem->tag, size);
	if (e) return e;

	gf_bs_write_int(bs, esdRem->ODID, 10);
	gf_bs_write_int(bs, 0, 6);		//aligned
	for (i = 0; i < esdRem->NbESDs ; i++) {
		gf_bs_write_int(bs, esdRem->ES_ID[i], 16);
	}
	//OD commands are aligned (but we are already aligned....
	gf_bs_align(bs);
	return GF_OK;
}


GF_ODCom *gf_odf_new_ipmp_remove()
{
	GF_IPMPRemove *newCom = (GF_IPMPRemove *) malloc(sizeof(GF_IPMPRemove));
	if (!newCom) return NULL;
	newCom->IPMPDescID  =NULL;
	newCom->NbIPMPDs = 0;
	newCom->tag = GF_ODF_IPMP_REMOVE_TAG;
	return (GF_ODCom *)newCom;
}

GF_Err gf_odf_del_ipmp_remove(GF_IPMPRemove *IPMPDRemove)
{
	if (! IPMPDRemove) return GF_BAD_PARAM;
	if (IPMPDRemove->IPMPDescID) free(IPMPDRemove->IPMPDescID);
	free(IPMPDRemove);
	return GF_OK;
}

GF_Err gf_odf_read_ipmp_remove(GF_BitStream *bs, GF_IPMPRemove *ipmpRem, u32 gf_odf_size_command)
{
	u32 i;
	if (! ipmpRem) return GF_BAD_PARAM;

	//we have gf_odf_size_command bytes left, and this is our IPMPD_ID[1...255]
	//this works because OD commands are aligned
	if (!gf_odf_size_command) return GF_OK;

	ipmpRem->NbIPMPDs = gf_odf_size_command;
	ipmpRem->IPMPDescID = (u8 *) malloc(sizeof(u8) * ipmpRem->NbIPMPDs);
	if (! ipmpRem->IPMPDescID) return GF_OUT_OF_MEM;

	for (i = 0; i < ipmpRem->NbIPMPDs; i++) {
		ipmpRem->IPMPDescID[i] = gf_bs_read_int(bs, 8);
	}
	//OD commands are aligned
	gf_bs_align(bs);
	return GF_OK;
}

GF_Err gf_odf_size_ipmp_remove(GF_IPMPRemove *ipmpRem, u32 *outSize)
{
	if (!ipmpRem) return GF_BAD_PARAM;

	*outSize = ipmpRem->NbIPMPDs;
	return GF_OK;
}
GF_Err gf_odf_write_ipmp_remove(GF_BitStream *bs, GF_IPMPRemove *ipmpRem)
{
	GF_Err e;
	u32 size, i;
	if (! ipmpRem) return GF_BAD_PARAM;

	e = gf_odf_size_ipmp_remove(ipmpRem, &size);
	if (e) return e;
	e = gf_odf_write_base_descriptor(bs, ipmpRem->tag, size);
	if (e) return e;

	for (i = 0; i < ipmpRem->NbIPMPDs; i++) {
		gf_bs_write_int(bs, ipmpRem->IPMPDescID[i], 8);
	}
	//OD commands are aligned
	gf_bs_align(bs);
	return GF_OK;
}

GF_ODCom *gf_odf_new_ipmp_update()
{
	GF_IPMPUpdate *newCom = (GF_IPMPUpdate *) malloc(sizeof(GF_IPMPUpdate));
	if (!newCom) return NULL;
	newCom->IPMPDescList = gf_list_new();
	if (! newCom->IPMPDescList) {
		free(newCom);
		return NULL;
	}
	newCom->tag = GF_ODF_IPMP_UPDATE_TAG;
	return (GF_ODCom *)newCom;
}

GF_Err gf_odf_del_ipmp_update(GF_IPMPUpdate *IPMPDUpdate)
{
	GF_Err e;
	if (! IPMPDUpdate) return GF_BAD_PARAM;
	while (gf_list_count(IPMPDUpdate->IPMPDescList)) {
		GF_Descriptor *tmp = (GF_Descriptor*)gf_list_get(IPMPDUpdate->IPMPDescList, 0);
		e = gf_odf_delete_descriptor(tmp);
		e = gf_list_rem(IPMPDUpdate->IPMPDescList, 0);
	}
	gf_list_del(IPMPDUpdate->IPMPDescList);
	free(IPMPDUpdate);
	return GF_OK;
}

GF_Err AddToIPMPDUpdate(GF_IPMPUpdate *ipmpUp, GF_Descriptor *desc)
{
	if (! ipmpUp) return GF_BAD_PARAM;
	if (!desc) return GF_OK;

	switch (desc->tag) {
	case GF_ODF_IPMP_TAG:
		return gf_list_add(ipmpUp->IPMPDescList, desc);
	default:
		gf_odf_delete_descriptor(desc);
		return GF_OK;
	}
}

GF_Err gf_odf_read_ipmp_update(GF_BitStream *bs, GF_IPMPUpdate *ipmpUp, u32 gf_odf_size_command)
{
	GF_Descriptor *tmp;
	u32 tmpSize = 0, nbBytes = 0;
	GF_Err e = GF_OK;
	if (! ipmpUp) return GF_BAD_PARAM;

	while (nbBytes < gf_odf_size_command) {
		e = gf_odf_parse_descriptor(bs, &tmp, &tmpSize);
		if (e) return e;
		e = AddToIPMPDUpdate(ipmpUp, tmp);
		if (e) return e;
		nbBytes += tmpSize + gf_odf_size_field_size(tmpSize);
	}
	//OD commands are aligned
	gf_bs_align(bs);
	if (nbBytes != gf_odf_size_command) return GF_ODF_INVALID_COMMAND;
	return e;
}


GF_Err gf_odf_size_ipmp_update(GF_IPMPUpdate *ipmpUp, u32 *outSize)
{
	GF_Descriptor *tmp;
	u32 i, tmpSize;
	if (!ipmpUp) return GF_BAD_PARAM;

	*outSize = 0;
	i=0;
	while ((tmp = (GF_Descriptor *)gf_list_enum(ipmpUp->IPMPDescList, &i))) {
		gf_odf_size_descriptor(tmp, &tmpSize);
		*outSize += tmpSize + gf_odf_size_field_size(tmpSize);
	}
	return GF_OK;
}
GF_Err gf_odf_write_ipmp_update(GF_BitStream *bs, GF_IPMPUpdate *ipmpUp)
{
	GF_Err e;
	GF_Descriptor *tmp;
	u32 size, i;
	if (! ipmpUp) return GF_BAD_PARAM;

	e = gf_odf_size_ipmp_update(ipmpUp, &size);
	if (e) return e;
	e = gf_odf_write_base_descriptor(bs, ipmpUp->tag, size);
	if (e) return e;

	i=0;
	while ((tmp = (GF_Descriptor *)gf_list_enum(ipmpUp->IPMPDescList, &i))) {
		e = gf_odf_write_descriptor(bs, tmp);
		if (e) return e;
	}
	//OD commands are aligned
	gf_bs_align(bs);
	return GF_OK;
}