diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/plugin.c | 64 | ||||
| -rw-r--r-- | src/slv2_internal.h | 3 |
2 files changed, 67 insertions, 0 deletions
diff --git a/src/plugin.c b/src/plugin.c index 4cdc1ed..a945e8a 100644 --- a/src/plugin.c +++ b/src/plugin.c @@ -18,6 +18,7 @@ #define _XOPEN_SOURCE 500 +#include <math.h> #include <string.h> #include <stdlib.h> #include <assert.h> @@ -509,6 +510,69 @@ slv2_plugin_get_num_ports(SLV2Plugin p) } +void +slv2_plugin_get_port_float_values(SLV2Plugin p, + const char* qname, + float* values) +{ + if (!p->rdf) + slv2_plugin_load(p); + + const unsigned char* query; + librdf_query* q; + librdf_query_results* results; + + for (int i = 0; i < raptor_sequence_size(p->ports); ++i) + values[i] = NAN; + + query = (const unsigned char*)slv2_strjoin( + "PREFIX : <http://lv2plug.in/ns/lv2core#>\n" + "SELECT DISTINCT ?index ?value WHERE {\n" + "<> :port ?port .\n" + "?port :index ?index .\n" + "?port ", qname, " ?value .\n" + "} ", NULL); + + q = librdf_new_query(p->world->world, "sparql", + NULL, query, slv2_value_as_librdf_uri(p->plugin_uri)); + + results = librdf_query_execute(q, p->rdf); + + while (!librdf_query_results_finished(results)) { + librdf_node* idx_node = librdf_query_results_get_binding_value(results, 0); + librdf_node* val_node = librdf_query_results_get_binding_value(results, 1); + assert(librdf_node_is_literal(idx_node)); + assert(librdf_node_is_literal(val_node)); + const int idx = atoi((const char*)librdf_node_get_literal_value(idx_node)); + const float val = atof((const char*)librdf_node_get_literal_value(val_node)); + values[idx] = val; + librdf_free_node(idx_node); + librdf_free_node(val_node); + librdf_query_results_next(results); + } + + librdf_free_query_results(results); + librdf_free_query(q); +} + + +void +slv2_plugin_get_port_ranges(SLV2Plugin p, + float* min_values, + float* max_values, + float* def_values) +{ + if (min_values) + slv2_plugin_get_port_float_values(p, ":minimum", min_values); + + if (max_values) + slv2_plugin_get_port_float_values(p, ":maximum", max_values); + + if (def_values) + slv2_plugin_get_port_float_values(p, ":default", def_values); +} + + uint32_t slv2_plugin_get_num_ports_of_class(SLV2Plugin p, SLV2Value class_1, ...) diff --git a/src/slv2_internal.h b/src/slv2_internal.h index d38daa4..753867e 100644 --- a/src/slv2_internal.h +++ b/src/slv2_internal.h @@ -72,6 +72,9 @@ struct _SLV2Plugin { SLV2Plugin slv2_plugin_new(SLV2World world, SLV2Value uri, librdf_uri* bundle_uri, librdf_uri* binary_uri); void slv2_plugin_load(SLV2Plugin p); void slv2_plugin_free(SLV2Plugin plugin); +void slv2_plugin_get_port_float_values(SLV2Plugin p, + const char* qname, + float* values); librdf_query_results* slv2_plugin_query(SLV2Plugin plugin, const char* sparql_str); |