URISet
properties(World* world, SPtr<const Client::ObjectModel> model)
{
URISet properties;
URISet types = RDFS::types(world, model);
LilvNode* rdf_type = lilv_new_uri(world->lilv_world(),
LILV_NS_RDF "type");
LilvNode* rdf_Property = lilv_new_uri(world->lilv_world(),
LILV_NS_RDF "Property");
LilvNode* rdfs_domain = lilv_new_uri(world->lilv_world(),
LILV_NS_RDFS "domain");
LilvNodes* props = lilv_world_find_nodes(
world->lilv_world(), NULL, rdf_type, rdf_Property);
LILV_FOREACH(nodes, p, props) {
const LilvNode* prop = lilv_nodes_get(props, p);
if (lilv_node_is_uri(prop)) {
LilvNodes* domains = lilv_world_find_nodes(
world->lilv_world(), prop, rdfs_domain, NULL);
unsigned n_matching_domains = 0;
LILV_FOREACH(nodes, d, domains) {
const LilvNode* domain_node = lilv_nodes_get(domains, d);
if (!lilv_node_is_uri(domain_node)) {
// TODO: Blank node domains (e.g. unions)
continue;
}
const Raul::URI domain(lilv_node_as_uri(domain_node));
if (types.count(domain)) {
++n_matching_domains;
}
}
if (lilv_nodes_size(domains) == 0 || (
n_matching_domains > 0 &&
n_matching_domains == lilv_nodes_size(domains))) {
properties.insert(Raul::URI(lilv_node_as_uri(prop)));
}
lilv_nodes_free(domains);
}
}
lilv_node_free(rdfs_domain);
lilv_node_free(rdf_Property);
lilv_node_free(rdf_type);
return properties;
}
Objects
instances(World* world, const URISet& types)
{
LilvNode* rdf_type = lilv_new_uri(
world->lilv_world(), LILV_NS_RDF "type");
Objects result;
for (const auto& t : types) {
LilvNode* type = lilv_new_uri(world->lilv_world(), t.c_str());
LilvNodes* objects = lilv_world_find_nodes(
world->lilv_world(), NULL, rdf_type, type);
LILV_FOREACH(nodes, o, objects) {
const LilvNode* object = lilv_nodes_get(objects, o);
if (!lilv_node_is_uri(object)) {
continue;
}
const std::string label = RDFS::label(world, object);
result.insert(
std::make_pair(label,
Raul::URI(lilv_node_as_string(object))));
}
lilv_node_free(type);
}
lilv_node_free(rdf_type);
return result;
}
URISet
range(World* world, const LilvNode* prop, bool recursive)
{
LilvNode* rdfs_range = lilv_new_uri(
world->lilv_world(), LILV_NS_RDFS "range");
LilvNodes* nodes = lilv_world_find_nodes(
world->lilv_world(), prop, rdfs_range, NULL);
URISet ranges;
LILV_FOREACH(nodes, n, nodes) {
ranges.insert(Raul::URI(lilv_node_as_string(lilv_nodes_get(nodes, n))));
}
Lv2Plugin *Lv2PluginCache::getPlugin(const char *uri, const char *preset, Lv2State *state) {
// create a unique key for uri/preset/state
std::string keyString(uri);
if(preset) {
keyString.append(":");
keyString.append(preset);
}
std::size_t hash = std::hash<std::string>()(keyString);
if(state) {
hash = hash ^ (state->getHash() << 1);
}
// count tells how many instances of this type of plugin
int count = ++instanceCount[hash];
// return cached plugin instance if available
int key = hash + count;
Lv2Plugin *cachedPlugin = findObject(key);
if(cachedPlugin) {
cachedPlugin->restore();
return cachedPlugin;
}
// look in cache for plugin type by uri
std::string uriString(uri);
const LilvPlugin *lilvPlugin = pluginMap[uriString];
if(!lilvPlugin) {
// find lv2 plugin in lilv
LilvNode *lilvUri = lilv_new_uri(world, uri);
lilvPlugin = lilv_plugins_get_by_uri(plugins, lilvUri);
lilv_node_free(lilvUri);
if(!lilvPlugin) {
throw std::logic_error(std::string("Plugin is not installed on this system: ") + uriString);
}
// check that required features are supported
LilvNodes* features = lilv_plugin_get_required_features(lilvPlugin);
for (LilvIter* f = lilv_nodes_begin(features); !lilv_nodes_is_end(features, f); f = lilv_nodes_next(features, f)) {
const char* featureUri = lilv_node_as_uri(lilv_nodes_get(features, f));
if(!supported[featureUri]) {
throw std::logic_error(std::string("Plugin ") + uriString + " requires unsupported feature: " + featureUri);
}
}
lilv_nodes_free(features);
pluginMap[uriString] = lilvPlugin;
}
// create worker if required
Lv2Worker *worker = 0;
if (lilv_plugin_has_feature(lilvPlugin, lv2Constants.lv2WorkerSchedule)
&& lilv_plugin_has_extension_data(lilvPlugin, lv2Constants.lv2WorkerInterface)) {
worker = new Lv2Worker();
((LV2_Worker_Schedule*)lv2Features[5]->data)->handle = worker;
}
// instantiate
LilvInstance *instance = lilv_plugin_instantiate(lilvPlugin, sampleRate, lv2Features);
// connect worker with plugin instance
if(worker) {
worker->setInstance(instance);
}
// create plugin object
Lv2Plugin *plugin = new Lv2Plugin(lilvPlugin, instance, lv2Constants, worker);
// restore baseline default state
LilvState *defaultState = lilv_state_new_from_world(world, &map, lilv_plugin_get_uri(lilvPlugin));
lilv_state_restore(defaultState, instance, setPortValue, plugin, 0, lv2Features);
// find and restore preset
if(preset) {
LilvNodes* presets = lilv_plugin_get_related(lilvPlugin, lv2Constants.lv2Presets);
LilvNode *myPreset = 0;
LILV_FOREACH(nodes, i, presets) {
const LilvNode* presetNode = lilv_nodes_get(presets, i);
lilv_world_load_resource(world, presetNode);
LilvNodes* labels = lilv_world_find_nodes(world, presetNode, lv2Constants.lv2RdfsLabel, NULL);
if (labels) {
const LilvNode* label = lilv_nodes_get_first(labels);
const char *labelString = lilv_node_as_string(label); // TODO: free?
if(!strcmp(labelString, preset)) {
myPreset = lilv_node_duplicate(presetNode);
}
lilv_nodes_free(labels);
}
}
lilv_nodes_free(presets);
if(myPreset) {
LilvState* presetState = lilv_state_new_from_world(world, &map, myPreset);
lilv_state_restore(presetState, instance, setPortValue, plugin, 0, NULL);
// lilv_state_free(state); // TODO
}
else {
throw std::logic_error(std::string("Plugin ") + uriString + " has no such preset: " + preset);
}
}
// restore state
else if(state) { // TODO: what if state is requested on a plugin that doesn't support?
