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-rw-r--r--utils/ladspa2lv2.c250
1 files changed, 250 insertions, 0 deletions
diff --git a/utils/ladspa2lv2.c b/utils/ladspa2lv2.c
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+++ b/utils/ladspa2lv2.c
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+/* ladspa2lv2
+ * Copyright (C) 2007 Dave Robillard <http://drobilla.net>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <inttypes.h>
+#include <ladspa.h>
+#include <dlfcn.h>
+#include <librdf.h>
+
+#define U(x) ((const unsigned char*)(x))
+
+librdf_world* world = NULL;
+
+LADSPA_Descriptor*
+load_ladspa_plugin(const char* lib_path, unsigned long index)
+{
+ void* const handle = dlopen(lib_path, RTLD_LAZY);
+ if (handle == NULL)
+ return NULL;
+
+ LADSPA_Descriptor_Function df
+ = (LADSPA_Descriptor_Function)dlsym(handle, "ladspa_descriptor");
+
+ if (df == NULL) {
+ dlclose(handle);
+ return NULL;
+ }
+
+ LADSPA_Descriptor* const descriptor = (LADSPA_Descriptor*)df(index);
+
+ return descriptor;
+}
+
+
+void
+add_resource(librdf_model* model,
+ librdf_node* subject,
+ const char* predicate_uri,
+ const char* object_uri)
+{
+ librdf_node* predicate = librdf_new_node_from_uri_string(world, U(predicate_uri));
+ librdf_node* object = librdf_new_node_from_uri_string(world, U(object_uri));
+
+ librdf_statement* triple = librdf_new_statement_from_nodes(world, subject, predicate, object);
+
+ librdf_model_add_statement(model, triple);
+
+ librdf_free_statement(triple);
+}
+
+
+void
+add_node(librdf_model* model,
+ librdf_node* subject,
+ const char* predicate_uri,
+ librdf_node* object)
+{
+ librdf_node* predicate = librdf_new_node_from_uri_string(world, U(predicate_uri));
+
+ librdf_statement* triple = librdf_new_statement_from_nodes(world, subject, predicate, object);
+
+ librdf_model_add_statement(model, triple);
+
+ librdf_free_statement(triple);
+}
+
+
+void
+add_string(librdf_model* model,
+ librdf_node* subject,
+ const char* predicate_uri,
+ const char* object_string)
+{
+ librdf_node* predicate = librdf_new_node_from_uri_string(world, U(predicate_uri));
+ librdf_node* object = librdf_new_node_from_literal(world, U(object_string), NULL, 0);
+
+ librdf_statement* triple = librdf_new_statement_from_nodes(world, subject, predicate, object);
+
+ librdf_model_add_statement(model, triple);
+
+ librdf_free_statement(triple);
+}
+
+
+void
+add_int(librdf_model* model,
+ librdf_node* subject,
+ const char* predicate_uri,
+ int object_int)
+{
+ static const size_t MAX_LEN = 21; // strlen(2^64) + 1
+ char object_str[MAX_LEN];
+ snprintf(object_str, MAX_LEN, "%d", object_int);
+
+ librdf_uri* type = librdf_new_uri(world, U("http://www.w3.org/2001/XMLSchema#integer"));
+
+ librdf_node* predicate = librdf_new_node_from_uri_string(world, U(predicate_uri));
+ librdf_node* object = librdf_new_node_from_typed_literal(world, U(object_str), NULL, type);
+
+ librdf_statement* triple = librdf_new_statement_from_nodes(world, subject, predicate, object);
+
+ librdf_model_add_statement(model, triple);
+
+ librdf_free_statement(triple);
+ librdf_free_uri(type);
+}
+
+
+void
+add_float(librdf_model* model,
+ librdf_node* subject,
+ const char* predicate_uri,
+ float object_float)
+{
+ static const size_t MAX_LEN = 64; // ?
+ char object_str[MAX_LEN];
+ snprintf(object_str, MAX_LEN, "%f", object_float);
+
+ librdf_uri* type = librdf_new_uri(world, U("http://www.w3.org/2001/XMLSchema#decimal"));
+
+ librdf_node* predicate = librdf_new_node_from_uri_string(world, U(predicate_uri));
+ librdf_node* object = librdf_new_node_from_typed_literal(world, U(object_str), NULL, type);
+
+ librdf_statement* triple = librdf_new_statement_from_nodes(world, subject, predicate, object);
+
+ librdf_model_add_statement(model, triple);
+
+ librdf_free_statement(triple);
+ librdf_free_uri(type);
+}
+
+
+void
+write_lv2_turtle(LADSPA_Descriptor* descriptor, const char* plugin_uri, const char* filename)
+{
+ librdf_storage* storage = librdf_new_storage(world,
+ "hashes", NULL, "hash-type='memory'");
+ librdf_model* model = librdf_new_model(world, storage, NULL);
+ librdf_serializer* serializer = librdf_new_serializer(world, "turtle", NULL, NULL);
+
+ librdf_node* plugin = librdf_new_node_from_uri_string(world, U(plugin_uri));
+
+ // Set up namespaces
+ librdf_serializer_set_namespace(serializer, librdf_new_uri(world,
+ U("http://www.w3.org/1999/02/22-rdf-syntax-ns#")), "rdf");
+ librdf_serializer_set_namespace(serializer, librdf_new_uri(world,
+ U("http://www.w3.org/2000/01/rdf-schema#")), "rdfs");
+ librdf_serializer_set_namespace(serializer, librdf_new_uri(world,
+ U("http://www.w3.org/2001/XMLSchema")), "xsd");
+ librdf_serializer_set_namespace(serializer, librdf_new_uri(world,
+ U("http://usefulinc.com/ns/doap#")), "doap");
+ librdf_serializer_set_namespace(serializer, librdf_new_uri(world,
+ U("http://xmlns.com/foaf/0.1/")), "foaf");
+ librdf_serializer_set_namespace(serializer, librdf_new_uri(world,
+ U("http://lv2plug.in/ontology#")), "lv2");
+
+ add_resource(model, plugin,
+ "rdf:type",
+ "lv2:Plugin");
+
+ add_string(model, plugin,
+ "doap:name",
+ descriptor->Name);
+
+ if (LADSPA_IS_HARD_RT_CAPABLE(descriptor->Properties))
+ add_resource(model, plugin,
+ "lv2:property",
+ "lv2:hardRTCapable");
+
+ for (uint32_t i=0; i < descriptor->PortCount; ++i) {
+ char index_str[32];
+ snprintf(index_str, (size_t)32, "%u", i);
+
+ librdf_node* port_node = librdf_new_node(world);
+
+ add_node(model, plugin,
+ "lv2:port",
+ port_node);
+
+ add_int(model, port_node,
+ "lv2:index",
+ (int)i);
+
+ add_resource(model, port_node,
+ "lv2:dataType",
+ "lv2:float");
+
+ add_string(model, port_node,
+ "lv2:name",
+ descriptor->PortNames[i]);
+ }
+
+ librdf_serializer_serialize_model_to_file(serializer, filename, NULL, model);
+}
+
+
+void
+print_usage()
+{
+ printf("Usage: ladspa2slv2 /path/to/laddspalib.so ladspa_index lv2_uri\n");
+ printf("Partially convert a LADSPA plugin to an LV2 plugin.");
+ printf("(This is a utility for developers, it will not generate a usable\n");
+ printf("LV2 plugin directly).\n\n");
+}
+
+
+int
+main(int argc, char** argv)
+{
+ if (argc != 4) {
+ print_usage();
+ return 1;
+ }
+
+ const char* const lib_path = argv[1];
+ const unsigned long index = atol(argv[2]);
+ const char* const uri = argv[3];
+
+ world = librdf_new_world();
+ librdf_world_open(world);
+
+ LADSPA_Descriptor* descriptor = load_ladspa_plugin(lib_path, index);
+
+ if (descriptor) {
+ printf("Loaded %s : %lu\n", lib_path, index);
+ write_lv2_turtle(descriptor, uri, "ladspaplugin.ttl");
+ } else {
+ printf("Failed to load %s : %lu\n", lib_path, index);
+ }
+
+ librdf_free_world(world);
+
+ return 0;
+}
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