示例#1
0
文件: conditional.c 项目: Bevara/GPAC
/*this is ugly but we have no choice, we need to clone the conditional stack because of externProto*/
void BIFS_SetupConditionalClone(GF_Node *node, GF_Node *orig)
{
#ifndef GPAC_DISABLE_BIFS
	M_Conditional *ptr;
	ConditionalStack *priv_orig, *priv;
	priv_orig = (ConditionalStack*)gf_node_get_private(orig);
	/*looks we're not in BIFS*/
	if (!priv_orig) {
#else
	{
#endif

#ifndef GPAC_DISABLE_VRML
		u32 i;
		GF_Command *ori_com;
		M_Conditional *c_orig, *c_dest;
		c_orig = (M_Conditional *)orig;
		c_dest = (M_Conditional *)node;
		gf_node_init(node);
		/*and clone all commands*/
		i=0;
		while ((ori_com = (GF_Command*)gf_list_enum(c_orig->buffer.commandList, &i))) {
			GF_Command *dest_com = gf_sg_vrml_command_clone(ori_com, gf_node_get_graph(node), 1);
			if (dest_com) gf_list_add(c_dest->buffer.commandList, dest_com);
		}
#endif
		return;
	}

#ifndef GPAC_DISABLE_BIFS
	priv = (ConditionalStack*)gf_malloc(sizeof(ConditionalStack));
	priv->codec = priv_orig->codec;
	priv->info = priv_orig->info;
	gf_node_set_callback_function(node, Conditional_PreDestroy);
	gf_node_set_private(node, priv);
	ptr = (M_Conditional *)node;
	ptr->on_activate = Conditional_OnActivate;
	ptr->on_reverseActivate = Conditional_OnReverseActivate;
#endif

}
示例#2
0
文件: vrml_tools.c 项目: erelh/gpac
GF_EXPORT
void gf_sg_vrml_field_clone(void *dest, void *orig, u32 field_type, GF_SceneGraph *inScene)
{
	u32 size, i, sf_type;
	void *dst_field, *orig_field;

	if (!dest || !orig) return;

	switch (field_type) {
	case GF_SG_VRML_SFBOOL:
		memcpy(dest, orig, sizeof(SFBool));
		break;
	case GF_SG_VRML_SFCOLOR:
		memcpy(dest, orig, sizeof(SFColor));
		break;
	case GF_SG_VRML_SFFLOAT:
		memcpy(dest, orig, sizeof(SFFloat));
		break;
	case GF_SG_VRML_SFINT32:
		memcpy(dest, orig, sizeof(SFInt32));
		break;
	case GF_SG_VRML_SFROTATION:
		memcpy(dest, orig, sizeof(SFRotation));
		break;
	case GF_SG_VRML_SFTIME:
		memcpy(dest, orig, sizeof(SFTime));
		break;
	case GF_SG_VRML_SFVEC2F:
		memcpy(dest, orig, sizeof(SFVec2f));
		break;
	case GF_SG_VRML_SFVEC3F:
		memcpy(dest, orig, sizeof(SFVec3f));
		break;
	case GF_SG_VRML_SFATTRREF:
		memcpy(dest, orig, sizeof(SFAttrRef));
		break;
	case GF_SG_VRML_SFSTRING:
		if ( ((SFString*)dest)->buffer) gf_free(((SFString*)dest)->buffer);
		if ( ((SFString*)orig)->buffer )
			((SFString*)dest)->buffer = gf_strdup(((SFString*)orig)->buffer);
		else
			((SFString*)dest)->buffer = NULL;
		break;
	case GF_SG_VRML_SFURL:
		if ( ((SFURL *)dest)->url ) gf_free( ((SFURL *)dest)->url );
		((SFURL *)dest)->OD_ID = ((SFURL *)orig)->OD_ID;
		if (((SFURL *)orig)->url)
			((SFURL *)dest)->url = gf_strdup(((SFURL *)orig)->url);
		else
			((SFURL *)dest)->url = NULL;
		break;
	case GF_SG_VRML_SFIMAGE:
		if (((SFImage *)dest)->pixels) gf_free(((SFImage *)dest)->pixels);
		((SFImage *)dest)->width = ((SFImage *)orig)->width;
		((SFImage *)dest)->height = ((SFImage *)orig)->height;
		((SFImage *)dest)->numComponents  = ((SFImage *)orig)->numComponents;
		size = ((SFImage *)dest)->width * ((SFImage *)dest)->height * ((SFImage *)dest)->numComponents;
		((SFImage *)dest)->pixels = (u8*)gf_malloc(sizeof(char)*size);
		memcpy(((SFImage *)dest)->pixels, ((SFImage *)orig)->pixels, sizeof(char)*size);
		break;
	case GF_SG_VRML_SFCOMMANDBUFFER:
	{
		SFCommandBuffer *cb_dst = (SFCommandBuffer *)dest;
		SFCommandBuffer *cb_src = (SFCommandBuffer *)orig;

		cb_dst->bufferSize = cb_src->bufferSize;
		if (cb_dst->bufferSize && !gf_list_count(cb_src->commandList) ) {
			cb_dst->buffer = (u8*)gf_realloc(cb_dst->buffer, sizeof(char)*cb_dst->bufferSize);
			memcpy(cb_dst->buffer, cb_src->buffer, sizeof(char)*cb_src->bufferSize);
		} else {
			u32 j, c2;
			if (cb_dst->buffer) gf_free(cb_dst->buffer);
			cb_dst->buffer = NULL;
			/*clone command list*/
			c2 = gf_list_count(cb_src->commandList);
			for (j=0; j<c2;j++) {
				GF_Command *sub_com = (GF_Command *)gf_list_get(cb_src->commandList, j);
				GF_Command *new_com = gf_sg_vrml_command_clone(sub_com, inScene, 0);
				gf_list_add(cb_dst->commandList, new_com);
			}
		}
	}
		break;

	/*simply copy text string*/
	case GF_SG_VRML_SFSCRIPT:
		if (((SFScript*)dest)->script_text) gf_free(((SFScript*)dest)->script_text);
		((SFScript*)dest)->script_text = NULL;
		if ( ((SFScript*)orig)->script_text)
			((SFScript *)dest)->script_text = (char *)gf_strdup( (char*) ((SFScript*)orig)->script_text );
		break;


	//simple MFFields, do a memcpy
	case GF_SG_VRML_MFBOOL:
	case GF_SG_VRML_MFFLOAT:
	case GF_SG_VRML_MFTIME:
	case GF_SG_VRML_MFINT32:
	case GF_SG_VRML_MFVEC3F:
	case GF_SG_VRML_MFVEC2F:
	case GF_SG_VRML_MFCOLOR:
	case GF_SG_VRML_MFROTATION:
	case GF_SG_VRML_MFATTRREF:
		size = gf_sg_vrml_get_sf_size(field_type) * ((GenMFField *)orig)->count;
		if (((GenMFField *)orig)->count != ((GenMFField *)dest)->count) {
			((GenMFField *)dest)->array = gf_realloc(((GenMFField *)dest)->array, size);
			((GenMFField *)dest)->count = ((GenMFField *)orig)->count;
		}
		memcpy(((GenMFField *)dest)->array, ((GenMFField *)orig)->array, size);
		break;
	//complex MFFields
	case GF_SG_VRML_MFSTRING:
	case GF_SG_VRML_MFIMAGE:
	case GF_SG_VRML_MFURL:
	case GF_SG_VRML_MFSCRIPT:
		size = ((GenMFField *)orig)->count;
		gf_sg_vrml_mf_reset(dest, field_type);
		gf_sg_vrml_mf_alloc(dest, field_type, size);
		sf_type = gf_sg_vrml_get_sf_type(field_type);
		//duplicate all items
		for (i=0; i<size; i++) {
			gf_sg_vrml_mf_get_item(dest, field_type, &dst_field, i);
			gf_sg_vrml_mf_get_item(orig, field_type, &orig_field, i);
			gf_sg_vrml_field_copy(dst_field, orig_field, sf_type);
		}
		break;
	}
}
示例#3
0
文件: commands.c 项目: bigbensk/gpac
GF_EXPORT
GF_Err gf_sg_command_apply(GF_SceneGraph *graph, GF_Command *com, Double time_offset)
{
	GF_Err e;
	GF_CommandField *inf;
#ifndef GPAC_DISABLE_VRML
	GF_FieldInfo field;
	void *slot_ptr;
	GF_Node *def;
#endif
	GF_Node *node;

	if (!com || !graph) return GF_BAD_PARAM;

	if (com->never_apply) return GF_OK;

	e = GF_OK;
	switch (com->tag) {
#ifndef GPAC_DISABLE_VRML
	case GF_SG_SCENE_REPLACE:
		/*unregister root*/
		gf_node_unregister(graph->RootNode, NULL);
		/*remove all protos and routes*/
		while (gf_list_count(graph->routes_to_activate)) 
			gf_list_rem(graph->routes_to_activate, 0);

		if (!com->aggregated) {
			/*destroy all routes*/
			while (gf_list_count(graph->Routes)) {
				GF_Route *r = (GF_Route *)gf_list_get(graph->Routes, 0);
				/*this will unregister the route from the graph, so don't delete the chain entry*/
				gf_sg_route_del(r);
			}
			/*destroy all proto*/
			while (gf_list_count(graph->protos)) {
				GF_Proto *p = (GF_Proto*)gf_list_get(graph->protos, 0);
				/*this will unregister the proto from the graph, so don't delete the chain entry*/
				gf_sg_proto_del(p);
			}
		}
		/*DO NOT TOUCH node registry*/
		/*DO NOT TOUCH UNREGISTERED PROTOS*/

		/*if no protos (previously aggregated command) create proto list*/
		if (!graph->protos) graph->protos = gf_list_new();

		/*move all protos in graph*/
		while (gf_list_count(com->new_proto_list)) {
			GF_Proto *p = (GF_Proto*)gf_list_get(com->new_proto_list, 0);
			gf_list_rem(com->new_proto_list, 0);
			gf_list_del_item(graph->unregistered_protos, p);
			gf_list_add(graph->protos, p);
		}
		/*assign new root (no need to register/unregister)*/
		graph->RootNode = com->node;
		com->node = NULL;
		break;

	case GF_SG_NODE_REPLACE:
		if (!gf_list_count(com->command_fields)) return GF_OK;
		inf = (GF_CommandField*)gf_list_get(com->command_fields, 0);
		e = gf_node_replace(com->node, inf->new_node, 0);
		if (inf->new_node) gf_node_register(inf->new_node, NULL);
		break;

	case GF_SG_MULTIPLE_REPLACE:
	case GF_SG_FIELD_REPLACE:
	{
		u32 j;
		GF_ChildNodeItem *list, *cur, *prev;
		j=0;
		while ((inf = (GF_CommandField*)gf_list_enum(com->command_fields, &j))) {
			e = gf_node_get_field(com->node, inf->fieldIndex, &field);
			if (e) return e;

			switch (field.fieldType) {
			case GF_SG_VRML_SFNODE:
			{
				node = *((GF_Node **) field.far_ptr);
				e = gf_node_unregister(node, com->node);
				*((GF_Node **) field.far_ptr) = inf->new_node;
				if (!e) gf_node_register(inf->new_node, com->node);
				break;
			}
			case GF_SG_VRML_MFNODE:
				gf_node_unregister_children(com->node, * ((GF_ChildNodeItem **) field.far_ptr));
				* ((GF_ChildNodeItem **) field.far_ptr) = NULL;

				list = * ((GF_ChildNodeItem **) inf->field_ptr);
				prev=NULL;
				while (list) {
					cur = gf_malloc(sizeof(GF_ChildNodeItem));
					cur->next = NULL;
					cur->node = list->node;
					if (prev) {
						prev->next = cur;
					} else {
						* ((GF_ChildNodeItem **) field.far_ptr) = cur;
					}
					gf_node_register(list->node, com->node);
					prev = cur;
					list = list->next;
				}
				break;
			case GF_SG_VRML_SFCOMMANDBUFFER:
			{
				u32 i, count;
				GF_SceneGraph *sg;
				SFCommandBuffer *cb_dst = (SFCommandBuffer *)field.far_ptr;
				SFCommandBuffer *cb_src = (SFCommandBuffer *)inf->field_ptr;

				/*reset dest*/
				if (!cb_dst->commandList) cb_dst->commandList = gf_list_new();

				while (gf_list_count(cb_dst->commandList)) {
					GF_Command *sub_com = (GF_Command *)gf_list_get(cb_dst->commandList, 0);
					gf_sg_command_del(sub_com);
					gf_list_rem(cb_dst->commandList, 0);
				}
				if (cb_dst->buffer) {
					gf_free(cb_dst->buffer);
					cb_dst->buffer = NULL;
				}

				/*clone command list*/
				sg = gf_node_get_graph(com->node);
				count = gf_list_count(cb_src->commandList);
				for (i=0; i<count;i++) {
					GF_Command *sub_com = (GF_Command *)gf_list_get(cb_src->commandList, i);
					GF_Command *new_com = gf_sg_vrml_command_clone(sub_com, sg, 0);
					gf_list_add(cb_dst->commandList, new_com);
				}
			}
				break;

			default:
				/*this is a regular field, reset it and clone - we cannot switch pointers since the
				original fields are NOT pointers*/
				if (!gf_sg_vrml_is_sf_field(field.fieldType)) {
					e = gf_sg_vrml_mf_reset(field.far_ptr, field.fieldType);
				}
				if (e) return e;
				gf_sg_vrml_field_copy(field.far_ptr, inf->field_ptr, field.fieldType);
				
				if ((field.fieldType==GF_SG_VRML_SFTIME) && !strstr(field.name, "media"))
					*(SFTime *)field.far_ptr = *(SFTime *)field.far_ptr + time_offset;
				break;
			}
			SG_CheckFieldChange(com->node, &field);
		}
		break;
	}

	case GF_SG_MULTIPLE_INDEXED_REPLACE:
	case GF_SG_INDEXED_REPLACE:
	{
		u32 sftype, i=0;
		while ((inf = (GF_CommandField*)gf_list_enum(com->command_fields, &i))) {
			e = gf_node_get_field(com->node, inf->fieldIndex, &field);
			if (e) return e;

			/*if MFNode remove the child and set new node*/
			if (field.fieldType == GF_SG_VRML_MFNODE) {
				/*we must remove the node before in case the new node uses the same ID (not forbidden) and this
				command removes the last instance of the node with the same ID*/
				gf_node_replace_child(com->node, (GF_ChildNodeItem**) field.far_ptr, inf->pos, inf->new_node);
				if (inf->new_node) gf_node_register(inf->new_node, NULL);
			}
			/*erase the field item*/
			else {
				if ((inf->pos < 0) || ((u32) inf->pos >= ((GenMFField *) field.far_ptr)->count) ) {
					inf->pos = ((GenMFField *)field.far_ptr)->count - 1;
					/*may happen with text and default value*/
					if (inf->pos < 0) {
						inf->pos = 0;
						gf_sg_vrml_mf_alloc(field.far_ptr, field.fieldType, 1);
					}
				}
				e = gf_sg_vrml_mf_get_item(field.far_ptr, field.fieldType, & slot_ptr, inf->pos);
				if (e) return e;
				sftype = gf_sg_vrml_get_sf_type(field.fieldType);
				gf_sg_vrml_field_copy(slot_ptr, inf->field_ptr, sftype);
				/*note we don't add time offset, since there's no MFTime*/
			}
			SG_CheckFieldChange(com->node, &field);
		}
		break;
	}
	case GF_SG_ROUTE_REPLACE:
	{
		GF_Route *r;
		char *name;
		r = gf_sg_route_find(graph, com->RouteID);
		def = gf_sg_find_node(graph, com->fromNodeID);
		node = gf_sg_find_node(graph, com->toNodeID);
		if (!node || !def) return GF_SG_UNKNOWN_NODE;
		name = NULL;
		if (r) {
			name = r->name;
			r->name = NULL;
			gf_sg_route_del(r);
		}
		r = gf_sg_route_new(graph, def, com->fromFieldIndex, node, com->toFieldIndex);
		gf_sg_route_set_id(r, com->RouteID);
		if (name) {
			gf_sg_route_set_name(r, name);
			gf_free(name);
		}
		break;
	}
	case GF_SG_NODE_DELETE_EX:
	case GF_SG_NODE_DELETE:
	{
		if (com->node) gf_node_replace(com->node, NULL, (com->tag==GF_SG_NODE_DELETE_EX) ? 1 : 0);
		break;
	}
	case GF_SG_ROUTE_DELETE:
	{
		return gf_sg_route_del_by_id(graph, com->RouteID);
	}
	case GF_SG_INDEXED_DELETE:
	{
		if (!gf_list_count(com->command_fields)) return GF_OK;
		inf = (GF_CommandField*)gf_list_get(com->command_fields, 0);

		e = gf_node_get_field(com->node, inf->fieldIndex, &field);
		if (e) return e;
		if (gf_sg_vrml_is_sf_field(field.fieldType)) return GF_NON_COMPLIANT_BITSTREAM;

		/*then we need special handling in case of a node*/
		if (gf_sg_vrml_get_sf_type(field.fieldType) == GF_SG_VRML_SFNODE) {
			e = gf_node_replace_child(com->node, (GF_ChildNodeItem **) field.far_ptr, inf->pos, NULL);
		} else {
			if ((inf->pos < 0) || ((u32) inf->pos >= ((GenMFField *) field.far_ptr)->count) ) {
				inf->pos = ((GenMFField *)field.far_ptr)->count - 1;
			}
			/*this is a regular MFField, just remove the item (gf_realloc)*/
			e = gf_sg_vrml_mf_remove(field.far_ptr, field.fieldType, inf->pos);
		}
		/*deletion -> node has changed*/
		if (!e) SG_CheckFieldChange(com->node, &field);
		break;
	}
	case GF_SG_NODE_INSERT:
	{
		if (!gf_list_count(com->command_fields)) return GF_OK;
		inf = (GF_CommandField*)gf_list_get(com->command_fields, 0);

		e = gf_node_insert_child(com->node, inf->new_node, inf->pos);
		if (!e) gf_node_register(inf->new_node, com->node);
		if (!e) gf_node_event_out(com->node, inf->fieldIndex);
		if (!e) gf_node_changed(com->node, NULL);
		break;
	}
	case GF_SG_ROUTE_INSERT:
	{
		GF_Route *r;
		def = gf_sg_find_node(graph, com->fromNodeID);
		node = gf_sg_find_node(graph, com->toNodeID);
		if (!node || !def) return GF_SG_UNKNOWN_NODE;
		r = gf_sg_route_new(graph, def, com->fromFieldIndex, node, com->toFieldIndex);
		if (com->RouteID) gf_sg_route_set_id(r, com->RouteID);
		if (com->def_name) {
			gf_sg_route_set_name(r, com->def_name);
			gf_free(com->def_name);
			com->def_name = NULL;
		}
		break;
	}
	case GF_SG_INDEXED_INSERT:
	{
		u32 sftype;
		if (!gf_list_count(com->command_fields)) return GF_OK;
		inf = (GF_CommandField*)gf_list_get(com->command_fields, 0);
		e = gf_node_get_field(com->node, inf->fieldIndex, &field);
		if (e) return e;

		/*rescale the MFField and parse the SFField*/
		if (field.fieldType != GF_SG_VRML_MFNODE) {
			if (inf->pos == -1) {
				e = gf_sg_vrml_mf_append(field.far_ptr, field.fieldType, & slot_ptr);
			} else {
				e = gf_sg_vrml_mf_insert(field.far_ptr, field.fieldType, & slot_ptr, inf->pos);
			}
			if (e) return e;
			sftype = gf_sg_vrml_get_sf_type(field.fieldType);
			gf_sg_vrml_field_copy(slot_ptr, inf->field_ptr, sftype);
		} else {
			if (inf->new_node) {
				if (inf->pos == -1) {
					gf_node_list_add_child( (GF_ChildNodeItem **) field.far_ptr, inf->new_node);
				} else {
					gf_node_list_insert_child((GF_ChildNodeItem **) field.far_ptr, inf->new_node, inf->pos);
				}
				gf_node_register(inf->new_node, com->node);
			}
		}
		if (!e) SG_CheckFieldChange(com->node, &field);
		break;
	}
	case GF_SG_PROTO_INSERT:
		/*destroy all proto*/
		while (gf_list_count(com->new_proto_list)) {
			GF_Proto *p = (GF_Proto*)gf_list_get(com->new_proto_list, 0);
			gf_list_rem(com->new_proto_list, 0);
			gf_list_del_item(graph->unregistered_protos, p);
			gf_list_add(graph->protos, p);
		}
		return GF_OK;
	case GF_SG_PROTO_DELETE:
		{
			u32 i;
			for (i=0; i<com->del_proto_list_size; i++) {
				/*note this will check for unregistered protos, but since IDs are unique we are sure we will 
				not destroy an unregistered one*/
				GF_Proto *proto = gf_sg_find_proto(graph, com->del_proto_list[i], NULL);
				if (proto) gf_sg_proto_del(proto);
			}
		}
		return GF_OK;
	case GF_SG_PROTO_DELETE_ALL:
		/*destroy all proto*/
		while (gf_list_count(graph->protos)) {
			GF_Proto *p = (GF_Proto*)gf_list_get(graph->protos, 0);
			gf_list_rem(graph->protos, 0);
			/*this will unregister the proto from the graph, so don't delete the chain entry*/
			gf_sg_proto_del(p);
		}
		/*DO NOT TOUCH UNREGISTERED PROTOS*/
		return GF_OK;
	case GF_SG_XREPLACE:
	{
		s32 pos = -2; 
		GF_Node *target = NULL;
		GF_ChildNodeItem *list, *cur, *prev;
		GF_FieldInfo value;
		inf = (GF_CommandField*)gf_list_get(com->command_fields, 0);
		if (!inf) return GF_SG_UNKNOWN_NODE;

		e = gf_node_get_field(com->node, inf->fieldIndex, &field);
		if (e) return e;
		target = com->node;

		if (!gf_sg_vrml_is_sf_field(field.fieldType)) {
			GF_FieldInfo idxField;
			if ((inf->pos != -2) || com->toNodeID) {
				if (com->toNodeID) {
					GF_Node *idxNode = gf_sg_find_node(graph, com->toNodeID);
					if (!idxNode) return GF_SG_UNKNOWN_NODE;
				
					if (gf_node_get_field(idxNode, com->toFieldIndex, &idxField) != GF_OK) return GF_OK;
					pos = 0;
					switch (idxField.fieldType) {
					case GF_SG_VRML_SFBOOL:
						if (*(SFBool*)idxField.far_ptr) pos = 1;
						break;
					case GF_SG_VRML_SFINT32:
						if (*(SFInt32*)idxField.far_ptr >=0) pos = *(SFInt32*)idxField.far_ptr;
						break;
					case GF_SG_VRML_SFFLOAT:
						if ( (*(SFFloat *)idxField.far_ptr) >=0) pos = (s32) floor( FIX2FLT(*(SFFloat*)idxField.far_ptr) );
						break;
					case GF_SG_VRML_SFTIME:
						if ( (*(SFTime *)idxField.far_ptr) >=0) pos = (s32) floor( (*(SFTime *)idxField.far_ptr) );
						break;
					}
				} else {
					pos = inf->pos;
				}
			}
		}
		/*override target node*/
		if ((field.fieldType==GF_SG_VRML_MFNODE) && (pos>=-1) && com->ChildNodeTag) {
			target = gf_node_list_get_child(*(GF_ChildNodeItem **)field.far_ptr, pos);
			if (!target) return GF_SG_UNKNOWN_NODE;
			if (gf_node_get_field(target, com->child_field, &field) != GF_OK) return GF_SG_UNKNOWN_NODE;
			pos=-2;
		}

		if (com->fromNodeID) {
			GF_Node *fromNode = gf_sg_find_node(graph, com->fromNodeID);
			if (!fromNode) return GF_SG_UNKNOWN_NODE;
			e = gf_node_get_field(fromNode, com->fromFieldIndex, &value);
			if (e) return e;
		} else {
			value.far_ptr = inf->field_ptr;
			value.fieldType = inf->fieldType;
		}
		/*indexed replacement*/
		if (pos>=-1) {
			/*if MFNode remove the child and set new node*/
			if (field.fieldType == GF_SG_VRML_MFNODE) {
				GF_Node *nn = *(GF_Node**)value.far_ptr;
				gf_node_replace_child(target, (GF_ChildNodeItem**) field.far_ptr, pos, nn);
				if (nn) gf_node_register(nn, NULL);
			}
			/*erase the field item*/
			else {
				u32 sftype;
				if ((pos < 0) || ((u32) pos >= ((GenMFField *) field.far_ptr)->count) ) {
					pos = ((GenMFField *)field.far_ptr)->count - 1;
					/*may happen with text and default value*/
					if (pos < 0) {
						pos = 0;
						gf_sg_vrml_mf_alloc(field.far_ptr, field.fieldType, 1);
					}
				}
				e = gf_sg_vrml_mf_get_item(field.far_ptr, field.fieldType, & slot_ptr, pos);
				if (e) return e;
				sftype = gf_sg_vrml_get_sf_type(field.fieldType);
				gf_sg_vrml_field_copy(slot_ptr, value.far_ptr, sftype);
				/*note we don't add time offset, since there's no MFTime*/
			}
		} else {
			switch (field.fieldType) {
			case GF_SG_VRML_SFNODE:
			{
				node = *((GF_Node **) field.far_ptr);
				e = gf_node_unregister(node, target);
				*((GF_Node **) field.far_ptr) = *((GF_Node **) value.far_ptr) ;
				if (!e) gf_node_register(*(GF_Node **) value.far_ptr, target);
				break;
			}
			case GF_SG_VRML_MFNODE:
				gf_node_unregister_children(target, * ((GF_ChildNodeItem **) field.far_ptr));
				* ((GF_ChildNodeItem **) field.far_ptr) = NULL;

				list = * ((GF_ChildNodeItem **) value.far_ptr);
				prev=NULL;
				while (list) {
					cur = gf_malloc(sizeof(GF_ChildNodeItem));
					cur->next = NULL;
					cur->node = list->node;
					if (prev) {
						prev->next = cur;
					} else {
						* ((GF_ChildNodeItem **) field.far_ptr) = cur;
					}
					gf_node_register(list->node, target);
					prev = cur;
					list = list->next;
				}
				break;

			default:
				if (!gf_sg_vrml_is_sf_field(field.fieldType)) {
					e = gf_sg_vrml_mf_reset(field.far_ptr, field.fieldType);
				}
				if (e) return e;
				gf_sg_vrml_field_clone(field.far_ptr, value.far_ptr, field.fieldType, graph);
				
				if ((field.fieldType==GF_SG_VRML_SFTIME) && !strstr(field.name, "media"))
					*(SFTime *)field.far_ptr = *(SFTime *)field.far_ptr + time_offset;
				break;
			}
		}
		SG_CheckFieldChange(target, &field);
	}
		return GF_OK;
	/*only used by BIFS*/
	case GF_SG_GLOBAL_QUANTIZER:
		return GF_OK;

#endif /*GPAC_DISABLE_VRML*/


#ifndef GPAC_DISABLE_SVG
	/*laser commands*/
	case GF_SG_LSR_NEW_SCENE:
		/*DO NOT TOUCH node registry*/

		/*assign new root (no need to register/unregister)*/
		graph->RootNode = com->node;
		com->node = NULL;
		break;
	case GF_SG_LSR_DELETE:
		if (!com->node) return GF_NON_COMPLIANT_BITSTREAM;
		if (!gf_list_count(com->command_fields)) {
			gf_node_replace(com->node, NULL, 0);
			gf_node_deactivate(com->node);
			return GF_OK;
		}
		inf = (GF_CommandField*)gf_list_get(com->command_fields, 0);
		node = gf_node_list_get_child(((SVG_Element *)com->node)->children, inf->pos);
		if (node) {
			e = gf_node_replace_child(com->node, &((SVG_Element *)com->node)->children, inf->pos, NULL);
			gf_node_deactivate(node);
		}
		break;
	case GF_SG_LSR_INSERT:
		inf = (GF_CommandField*)gf_list_get(com->command_fields, 0);
		if (!com->node || !inf) return GF_NON_COMPLIANT_BITSTREAM;
		if (inf->new_node) {
			if (inf->pos<0) 
				gf_node_list_add_child(& ((SVG_Element *)com->node)->children, inf->new_node);
			else
				gf_node_list_insert_child(& ((SVG_Element *)com->node)->children, inf->new_node, inf->pos);

			gf_node_register(inf->new_node, com->node);
			gf_node_activate(inf->new_node);
			gf_node_changed(com->node, NULL);
		} else {
			/*NOT SUPPORTED*/
			GF_LOG(GF_LOG_ERROR, GF_LOG_CODEC, ("[LASeR] VALUE INSERTION NOT SUPPORTED\n"));
		}
		break;
	case GF_SG_LSR_ADD:
	case GF_SG_LSR_REPLACE:
		inf = (GF_CommandField*)gf_list_get(com->command_fields, 0);
		if (!com->node || !inf) return GF_NON_COMPLIANT_BITSTREAM;
		if (inf->new_node) {
			if (inf->pos<0) {
				/*if fieldIndex (eg attributeName) is set, this is children replacement*/
				if (inf->fieldIndex>0) {
					gf_node_unregister_children_deactivate(com->node, ((SVG_Element *)com->node)->children);
					((SVG_Element *)com->node)->children = NULL;
					gf_node_list_add_child(& ((SVG_Element *)com->node)->children, inf->new_node);
					gf_node_register(inf->new_node, com->node);
					gf_node_activate(inf->new_node);
				} else {
					e = gf_node_replace(com->node, inf->new_node, 0);
					gf_node_activate(inf->new_node);
				}
			} else {
				node = gf_node_list_get_child( ((SVG_Element *)com->node)->children, inf->pos);
				gf_node_replace_child(com->node, & ((SVG_Element *)com->node)->children, inf->pos, inf->new_node);
				gf_node_register(inf->new_node, com->node);
				if (node) gf_node_deactivate(node);
				gf_node_activate(inf->new_node);
			}
			/*signal node modif*/
			gf_node_changed(com->node, NULL);
			return e;
		} else if (inf->node_list) {
			GF_ChildNodeItem *child, *cur, *prev;
			gf_node_unregister_children_deactivate(com->node, ((SVG_Element *)com->node)->children);
			((SVG_Element *)com->node)->children = NULL;

			prev = NULL;
			child = inf->node_list;
			while (child) {
				cur = (GF_ChildNodeItem*)gf_malloc(sizeof(GF_ChildNodeItem));
				cur->next = NULL;
				cur->node = child->node;
				gf_node_register(child->node, com->node);
				gf_node_activate(child->node);
				if (prev) prev->next = cur;
				else ((SVG_Element *)com->node)->children = cur;
				prev = cur;
				child = child->next;
			}
			/*signal node modif*/
			gf_node_changed(com->node, NULL);
			return GF_OK;
		}
		/*attribute modif*/
		else if (inf->field_ptr) {
			GF_FieldInfo a, b;
			if (inf->fieldIndex==(u32) -2) {
				GF_Point2D scale, translate;
				Fixed rotate;
				GF_Matrix2D *dest;
				gf_node_get_field_by_name(com->node, "transform", &a);
				dest = (GF_Matrix2D*)a.far_ptr;
				
				if (com->tag==GF_SG_LSR_REPLACE) {
					if (gf_mx2d_decompose(dest, &scale, &rotate, &translate)) {
						gf_mx2d_init(*dest);
						if (inf->fieldType==SVG_TRANSFORM_SCALE) scale = *(GF_Point2D *)inf->field_ptr;
						else if (inf->fieldType==SVG_TRANSFORM_TRANSLATE) translate = *(GF_Point2D *)inf->field_ptr;
						else if (inf->fieldType==SVG_TRANSFORM_ROTATE) rotate = ((SVG_Point_Angle*)inf->field_ptr)->angle;

						gf_mx2d_add_scale(dest, scale.x, scale.y);
						gf_mx2d_add_rotation(dest, 0, 0, rotate);
						gf_mx2d_add_translation(dest, translate.x, translate.y);
					}
				} else {
					GF_Point2D *pt = (GF_Point2D *)inf->field_ptr;
					if (inf->fieldType==SVG_TRANSFORM_SCALE) gf_mx2d_add_scale(dest, pt->x, pt->y);
					else if (inf->fieldType==SVG_TRANSFORM_TRANSLATE) gf_mx2d_add_translation(dest, pt->x, pt->y);
					else if (inf->fieldType == SVG_TRANSFORM_ROTATE) gf_mx2d_add_rotation(dest, 0, 0, ((SVG_Point_Angle*)inf->field_ptr)->angle);
				}
				/*signal node modif*/
				gf_node_changed(com->node, &a);
			} else {
				if ((inf->fieldIndex==(u32) -1) && (inf->fieldType==DOM_String_datatype)) {
					char *str = *(SVG_String*)inf->field_ptr;

					if (com->tag == GF_SG_LSR_REPLACE) {
						GF_DOMText *t = ((SVG_Element*)com->node)->children ? (GF_DOMText*) ((SVG_Element*)com->node)->children->node :NULL; 
						if (t && (t->sgprivate->tag==TAG_DOMText)) {
							if (t->textContent) gf_free(t->textContent);
							t->textContent = NULL;
							if (str) t->textContent = gf_strdup(str);
						}
					} else {
						if (str) gf_dom_add_text_node(com->node, gf_strdup(str));
					}
					/*signal node modif*/
					gf_node_changed(com->node, NULL);
				}
				else if ((inf->fieldIndex==TAG_LSR_ATT_scale) 
					|| (inf->fieldIndex==TAG_LSR_ATT_translation)
					|| (inf->fieldIndex==TAG_LSR_ATT_rotation)
				) {
					SVG_Transform *mx;
					gf_node_get_attribute_by_tag(com->node, TAG_SVG_ATT_transform, 1, 0, &a);
					mx = a.far_ptr;
					if (com->tag == GF_SG_LSR_REPLACE) {
						GF_Point2D scale, translate;
						SVG_Point_Angle rotate;
						if (gf_mx2d_decompose(&mx->mat, &scale, &rotate.angle, &translate)) {
							gf_mx2d_init(mx->mat);
							if (inf->fieldIndex==TAG_LSR_ATT_scale) scale = *(GF_Point2D *)inf->field_ptr;
							else if (inf->fieldIndex==TAG_LSR_ATT_translation) translate = *(GF_Point2D *)inf->field_ptr;
							else if (inf->fieldIndex==TAG_LSR_ATT_rotation) rotate = *(SVG_Point_Angle*)inf->field_ptr;

							gf_mx2d_add_scale(&mx->mat, scale.x, scale.y);
							gf_mx2d_add_rotation(&mx->mat, 0, 0, rotate.angle);
							gf_mx2d_add_translation(&mx->mat, translate.x, translate.y);
						}
					} else {
						if (inf->fieldIndex==TAG_LSR_ATT_scale) gf_mx2d_add_scale(&mx->mat, ((GF_Point2D*)inf->field_ptr)->x, ((GF_Point2D*)inf->field_ptr)->y);
						if (inf->fieldIndex==TAG_LSR_ATT_translation) gf_mx2d_add_translation(&mx->mat, ((GF_Point2D*)inf->field_ptr)->x, ((GF_Point2D*)inf->field_ptr)->y);
						if (inf->fieldIndex==TAG_LSR_ATT_rotation) gf_mx2d_add_rotation(&mx->mat, 0, 0, ((SVG_Point_Angle*)inf->field_ptr)->angle);
					}
					/*signal node modif*/
					gf_node_changed(com->node, &a);
				}
				else if (gf_node_get_attribute_by_tag(com->node, inf->fieldIndex, 1, 0, &a) == GF_OK) {
					b = a;
					b.far_ptr = inf->field_ptr;
					if (com->tag == GF_SG_LSR_REPLACE) {
						gf_svg_attributes_copy(&a, &b, 0);
					} else {
						gf_svg_attributes_add(&a, &b, &a, 0);
					}
					if (a.fieldType==XMLRI_datatype) {
						gf_node_dirty_set(com->node, GF_SG_SVG_XLINK_HREF_DIRTY, 0);
					}
					/*signal node modif*/
					gf_node_changed(com->node, &a);
				}
			}
		} else if (com->fromNodeID) {
			GF_FieldInfo a, b;
			GF_Node *fromNode = gf_sg_find_node(graph, com->fromNodeID);
			if (!fromNode) return GF_NON_COMPLIANT_BITSTREAM;
			if (gf_node_get_field(fromNode, com->fromFieldIndex, &b) != GF_OK) return GF_NON_COMPLIANT_BITSTREAM;

			if ((inf->fieldIndex==(u32) -1) && (inf->fieldType==DOM_String_datatype)) {
				char *str = *(SVG_String*)inf->field_ptr;

				if (com->tag == GF_SG_LSR_REPLACE) {
					GF_DOMText *t = ((SVG_Element*)com->node)->children ? (GF_DOMText*) ((SVG_Element*)com->node)->children->node :NULL; 
					if (t && (t->sgprivate->tag==TAG_DOMText)) {
						if (t->textContent) gf_free(t->textContent);
						t->textContent = NULL;
						if (str) t->textContent = gf_strdup(str);
					}
				} else {
					if (str) gf_dom_add_text_node(com->node, gf_strdup(str));
				}
			} else {
				gf_node_get_field(com->node, inf->fieldIndex, &a);
				if (com->tag == GF_SG_LSR_REPLACE) {
					e = gf_svg_attributes_copy(&a, &b, 0);
				} else {
					e = gf_svg_attributes_add(&a, &b, &a, 0);
				}
			}
			gf_node_changed(com->node, &a);
			return e;
		} else {
			return GF_NON_COMPLIANT_BITSTREAM;
		}
		break;
	case GF_SG_LSR_ACTIVATE:
		gf_node_activate(com->node);
		break;
	case GF_SG_LSR_DEACTIVATE:
		gf_node_deactivate(com->node);
		gf_node_changed(com->node, NULL);
		break;
	case GF_SG_LSR_SEND_EVENT:
	{
		GF_DOM_Event evt;
		memset(&evt, 0, sizeof(GF_DOM_Event));
		evt.type = com->send_event_name;
		evt.detail = com->send_event_integer;
		evt.clientX = com->send_event_x;
		evt.clientY = com->send_event_y;
		gf_dom_event_fire(com->node, &evt);
	}
		break;
#endif

	default:
		return GF_NOT_SUPPORTED;
	}
	if (e) return e;

#ifndef GPAC_DISABLE_VRML
	if (com->scripts_to_load) {
		while (gf_list_count(com->scripts_to_load)) {
			GF_Node *script = (GF_Node *)gf_list_get(com->scripts_to_load, 0);
			gf_list_rem(com->scripts_to_load, 0);
			gf_sg_script_load(script);
		}
		gf_list_del(com->scripts_to_load);
		com->scripts_to_load = NULL;
	}
#endif

	return GF_OK;
}