cannam@222: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
cannam@222: 
cannam@222: /*
cannam@222:     Piper C++
cannam@222: 
cannam@222:     An API for audio analysis and feature extraction plugins.
cannam@222: 
cannam@222:     Centre for Digital Music, Queen Mary, University of London.
cannam@222:     Copyright 2006-2017 Chris Cannam and QMUL.
cannam@222:   
cannam@222:     Permission is hereby granted, free of charge, to any person
cannam@222:     obtaining a copy of this software and associated documentation
cannam@222:     files (the "Software"), to deal in the Software without
cannam@222:     restriction, including without limitation the rights to use, copy,
cannam@222:     modify, merge, publish, distribute, sublicense, and/or sell copies
cannam@222:     of the Software, and to permit persons to whom the Software is
cannam@222:     furnished to do so, subject to the following conditions:
cannam@222: 
cannam@222:     The above copyright notice and this permission notice shall be
cannam@222:     included in all copies or substantial portions of the Software.
cannam@222: 
cannam@222:     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
cannam@222:     EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
cannam@222:     MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
cannam@222:     NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
cannam@222:     ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
cannam@222:     CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
cannam@222:     WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
cannam@222: 
cannam@222:     Except as contained in this notice, the names of the Centre for
cannam@222:     Digital Music; Queen Mary, University of London; and Chris Cannam
cannam@222:     shall not be used in advertising or otherwise to promote the sale,
cannam@222:     use or other dealings in this Software without prior written
cannam@222:     authorization.
cannam@222: */
cannam@222: 
cannam@222: #ifndef PIPER_RDF_TYPES_H
cannam@222: #define PIPER_RDF_TYPES_H
cannam@222: 
cannam@222: #include "StaticOutputDescriptor.h"
cannam@222: 
cannam@222: #include <vamp-hostsdk/PluginLoader.h>
cannam@222: 
cannam@222: #include <sord/sord.h>
cannam@222: 
cannam@223: #include <mutex>
cannam@223: 
cannam@222: namespace piper_vamp {
cannam@222: 
cannam@222: class RdfTypes
cannam@222: {
cannam@222: public:
cannam@223:     RdfTypes() :
cannam@223:         m_world(sord_world_new())
cannam@223:     {}
cannam@223: 
cannam@223:     ~RdfTypes() {
cannam@223:         sord_world_free(m_world);
cannam@223:     }
cannam@223:     
cannam@223:     StaticOutputInfo loadStaticOutputInfo(Vamp::HostExt::PluginLoader::PluginKey
cannam@223:                                           pluginKey) {
cannam@223: 
cannam@223:         StaticOutputInfo info;
cannam@223:         SordModel *model = sord_new(m_world, SORD_SPO|SORD_OPS|SORD_POS, false);
cannam@223:         if (loadRdf(model, candidateRdfFilesFor(pluginKey))) {
cannam@223:             // we want to find a graph like
cannam@224:             // :plugin a vamp:Plugin
cannam@224:             // :plugin vamp:identifier "pluginId"
cannam@224:             // :library vamp:available_plugin :plugin
cannam@224:             // :library vamp:identifier "libraryId"
cannam@223:             // :plugin vamp:output :output1
cannam@223:             // :plugin vamp:output :output2
cannam@223:             // :plugin vamp:output :output3
cannam@223:             // :output1 vamp:computes_event_type :event
cannam@223:             // :output2 vamp:computes_feature :feature
cannam@223:             // :output3 vamp:computes_signal_type :signal
cannam@224:             // and where pluginKey == libraryId + ":" + pluginId
cannam@223:         }
cannam@223:         sord_free(model);
cannam@223:         return info;
cannam@223:     }
cannam@223: 
cannam@223: private:
cannam@223:     SordWorld *m_world;
cannam@223: 
cannam@223:     bool loadRdf(SordModel *targetModel, std::vector<std::string> filenames) {
cannam@223:         for (auto f: filenames) {
cannam@223:             if (loadRdfFile(targetModel, f)) {
cannam@223:                 return true;
cannam@223:             }
cannam@223:         }
cannam@223:         return false;
cannam@223:     }
cannam@223: 
cannam@223:     bool loadRdfFile(SordModel *targetModel, std::string filename) {
cannam@223:         std::string base = "file://" + filename;
cannam@223:         SerdURI bu;
cannam@223:         if (serd_uri_parse((const uint8_t *)base.c_str(), &bu) !=
cannam@223:             SERD_SUCCESS) {
cannam@223:             std::cerr << "Failed to parse base URI " << base << std::endl;
cannam@223:             return false;
cannam@223:         }
cannam@223:         SerdNode bn = serd_node_from_string(SERD_URI,
cannam@223:                                             (const uint8_t *)base.c_str());
cannam@223:         SerdEnv *env = serd_env_new(&bn);
cannam@223:         SerdReader *reader = sord_new_reader(targetModel, env, SERD_TURTLE, 0);
cannam@223:         SerdStatus rv = serd_reader_read_file
cannam@223:             (reader, (const uint8_t *)filename.c_str());
cannam@223:         bool success = (rv == SERD_SUCCESS);
cannam@223:         if (!success) {
cannam@223:             std::cerr << "Failed to import RDF from " << filename << std::endl;
cannam@223:         } else {
cannam@223:             std::cerr << "Imported RDF from " << filename << std::endl;
cannam@223:         }
cannam@223:         serd_reader_free(reader);
cannam@223:         serd_env_free(env);
cannam@223:         return success;
cannam@223:     }
cannam@223:     
cannam@223:     std::vector<std::string> candidateRdfFilesFor(Vamp::HostExt::
cannam@223:                                                   PluginLoader::PluginKey key) {
cannam@223: 
cannam@223:         std::string library = Vamp::HostExt::PluginLoader::getInstance()->
cannam@223:             getLibraryPathForPlugin(key);
cannam@223: 	
cannam@223:         auto li = library.rfind('.');
cannam@223:         if (li == std::string::npos) return {};
cannam@223:         auto withoutSuffix = library.substr(0, li);
cannam@223: 
cannam@223:         std::vector<std::string> suffixes { "ttl", "TTL", "n3", "N3" };
cannam@223:         std::vector<std::string> candidates;
cannam@223: 
cannam@223:         for (auto suffix : suffixes) {
cannam@223:             candidates.push_back(withoutSuffix + "." + suffix);
cannam@223:         }
cannam@223: 
cannam@223:         return candidates;
cannam@222:     }
cannam@222: };
cannam@222: 
cannam@222: }
cannam@222: 
cannam@222: #endif