Mercurial > hg > svcore
view plugin/FeatureExtractionPluginFactory.cpp @ 962:613ee830de5e
Fix return of empty string as bool value (from coverity scan, interesting the compiler doesn't mind)
author | Chris Cannam |
---|---|
date | Wed, 03 Sep 2014 09:58:31 +0100 |
parents | f5cd33909744 |
children | 7aa9088e9bcd |
line wrap: on
line source
/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */ /* Sonic Visualiser An audio file viewer and annotation editor. Centre for Digital Music, Queen Mary, University of London. This file copyright 2006 Chris Cannam and QMUL. 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. See the file COPYING included with this distribution for more information. */ #include "FeatureExtractionPluginFactory.h" #include "PluginIdentifier.h" #include <vamp-hostsdk/PluginHostAdapter.h> #include <vamp-hostsdk/PluginWrapper.h> #include "system/System.h" #include <QDir> #include <QFile> #include <QFileInfo> #include <QTextStream> #include <iostream> #include "base/Profiler.h" //#define DEBUG_PLUGIN_SCAN_AND_INSTANTIATE 1 class PluginDeletionNotifyAdapter : public Vamp::HostExt::PluginWrapper { public: PluginDeletionNotifyAdapter(Vamp::Plugin *plugin, FeatureExtractionPluginFactory *factory) : PluginWrapper(plugin), m_factory(factory) { } virtual ~PluginDeletionNotifyAdapter(); protected: FeatureExtractionPluginFactory *m_factory; }; PluginDeletionNotifyAdapter::~PluginDeletionNotifyAdapter() { // see notes in vamp-sdk/hostext/PluginLoader.cpp from which this is drawn Vamp::Plugin *p = m_plugin; delete m_plugin; m_plugin = 0; if (m_factory) m_factory->pluginDeleted(p); } static FeatureExtractionPluginFactory *_nativeInstance = 0; FeatureExtractionPluginFactory * FeatureExtractionPluginFactory::instance(QString pluginType) { if (pluginType == "vamp") { if (!_nativeInstance) { // SVDEBUG << "FeatureExtractionPluginFactory::instance(" << pluginType// << "): creating new FeatureExtractionPluginFactory" << endl; _nativeInstance = new FeatureExtractionPluginFactory(); } return _nativeInstance; } else return 0; } FeatureExtractionPluginFactory * FeatureExtractionPluginFactory::instanceFor(QString identifier) { QString type, soName, label; PluginIdentifier::parseIdentifier(identifier, type, soName, label); return instance(type); } std::vector<QString> FeatureExtractionPluginFactory::getPluginPath() { if (!m_pluginPath.empty()) return m_pluginPath; std::vector<std::string> p = Vamp::PluginHostAdapter::getPluginPath(); for (size_t i = 0; i < p.size(); ++i) m_pluginPath.push_back(p[i].c_str()); return m_pluginPath; } std::vector<QString> FeatureExtractionPluginFactory::getAllPluginIdentifiers() { FeatureExtractionPluginFactory *factory; std::vector<QString> rv; factory = instance("vamp"); if (factory) { std::vector<QString> tmp = factory->getPluginIdentifiers(); for (size_t i = 0; i < tmp.size(); ++i) { // cerr << "identifier: " << tmp[i] << endl; rv.push_back(tmp[i]); } } // Plugins can change the locale, revert it to default. RestoreStartupLocale(); return rv; } std::vector<QString> FeatureExtractionPluginFactory::getPluginIdentifiers() { Profiler profiler("FeatureExtractionPluginFactory::getPluginIdentifiers"); std::vector<QString> rv; std::vector<QString> path = getPluginPath(); for (std::vector<QString>::iterator i = path.begin(); i != path.end(); ++i) { #ifdef DEBUG_PLUGIN_SCAN_AND_INSTANTIATE SVDEBUG << "FeatureExtractionPluginFactory::getPluginIdentifiers: scanning directory " << i-<< endl; #endif QDir pluginDir(*i, PLUGIN_GLOB, QDir::Name | QDir::IgnoreCase, QDir::Files | QDir::Readable); for (unsigned int j = 0; j < pluginDir.count(); ++j) { QString soname = pluginDir.filePath(pluginDir[j]); #ifdef DEBUG_PLUGIN_SCAN_AND_INSTANTIATE SVDEBUG << "FeatureExtractionPluginFactory::getPluginIdentifiers: trying potential library " << soname << endl; #endif void *libraryHandle = DLOPEN(soname, RTLD_LAZY | RTLD_LOCAL); if (!libraryHandle) { cerr << "WARNING: FeatureExtractionPluginFactory::getPluginIdentifiers: Failed to load library " << soname << ": " << DLERROR() << endl; continue; } #ifdef DEBUG_PLUGIN_SCAN_AND_INSTANTIATE SVDEBUG << "FeatureExtractionPluginFactory::getPluginIdentifiers: It's a library all right, checking for descriptor" << endl; #endif VampGetPluginDescriptorFunction fn = (VampGetPluginDescriptorFunction) DLSYM(libraryHandle, "vampGetPluginDescriptor"); if (!fn) { cerr << "WARNING: FeatureExtractionPluginFactory::getPluginIdentifiers: No descriptor function in " << soname << endl; if (DLCLOSE(libraryHandle) != 0) { cerr << "WARNING: FeatureExtractionPluginFactory::getPluginIdentifiers: Failed to unload library " << soname << endl; } continue; } #ifdef DEBUG_PLUGIN_SCAN_AND_INSTANTIATE SVDEBUG << "FeatureExtractionPluginFactory::getPluginIdentifiers: Vamp descriptor found" << endl; #endif const VampPluginDescriptor *descriptor = 0; int index = 0; std::map<std::string, int> known; bool ok = true; while ((descriptor = fn(VAMP_API_VERSION, index))) { if (known.find(descriptor->identifier) != known.end()) { cerr << "WARNING: FeatureExtractionPluginFactory::getPluginIdentifiers: Plugin library " << soname << " returns the same plugin identifier \"" << descriptor->identifier << "\" at indices " << known[descriptor->identifier] << " and " << index << endl; SVDEBUG << "FeatureExtractionPluginFactory::getPluginIdentifiers: Avoiding this library (obsolete API?)" << endl; ok = false; break; } else { known[descriptor->identifier] = index; } ++index; } if (ok) { index = 0; while ((descriptor = fn(VAMP_API_VERSION, index))) { QString id = PluginIdentifier::createIdentifier ("vamp", soname, descriptor->identifier); rv.push_back(id); #ifdef DEBUG_PLUGIN_SCAN_AND_INSTANTIATE SVDEBUG << "FeatureExtractionPluginFactory::getPluginIdentifiers: Found plugin id " << id << " at index " << index << endl; #endif ++index; } } if (DLCLOSE(libraryHandle) != 0) { cerr << "WARNING: FeatureExtractionPluginFactory::getPluginIdentifiers: Failed to unload library " << soname << endl; } } } generateTaxonomy(); return rv; } QString FeatureExtractionPluginFactory::findPluginFile(QString soname, QString inDir) { QString file = ""; #ifdef DEBUG_PLUGIN_SCAN_AND_INSTANTIATE SVDEBUG << "FeatureExtractionPluginFactory::findPluginFile(\"" << soname << "\", \"" << inDir << "\")" << endl; #endif if (inDir != "") { QDir dir(inDir, PLUGIN_GLOB, QDir::Name | QDir::IgnoreCase, QDir::Files | QDir::Readable); if (!dir.exists()) return ""; file = dir.filePath(QFileInfo(soname).fileName()); if (QFileInfo(file).exists() && QFileInfo(file).isFile()) { #ifdef DEBUG_PLUGIN_SCAN_AND_INSTANTIATE SVDEBUG << "FeatureExtractionPluginFactory::findPluginFile: " << "found trivially at " << file << endl; #endif return file; } for (unsigned int j = 0; j < dir.count(); ++j) { file = dir.filePath(dir[j]); if (QFileInfo(file).baseName() == QFileInfo(soname).baseName()) { #ifdef DEBUG_PLUGIN_SCAN_AND_INSTANTIATE SVDEBUG << "FeatureExtractionPluginFactory::findPluginFile: " << "found \"" << soname << "\" at " << file << endl; #endif return file; } } #ifdef DEBUG_PLUGIN_SCAN_AND_INSTANTIATE SVDEBUG << "FeatureExtractionPluginFactory::findPluginFile (with dir): " << "not found" << endl; #endif return ""; } else { QFileInfo fi(soname); if (fi.isAbsolute() && fi.exists() && fi.isFile()) { #ifdef DEBUG_PLUGIN_SCAN_AND_INSTANTIATE SVDEBUG << "FeatureExtractionPluginFactory::findPluginFile: " << "found trivially at " << soname << endl; #endif return soname; } if (fi.isAbsolute() && fi.absolutePath() != "") { file = findPluginFile(soname, fi.absolutePath()); if (file != "") return file; } std::vector<QString> path = getPluginPath(); for (std::vector<QString>::iterator i = path.begin(); i != path.end(); ++i) { if (*i != "") { file = findPluginFile(soname, *i); if (file != "") return file; } } #ifdef DEBUG_PLUGIN_SCAN_AND_INSTANTIATE SVDEBUG << "FeatureExtractionPluginFactory::findPluginFile: " << "not found" << endl; #endif return ""; } } Vamp::Plugin * FeatureExtractionPluginFactory::instantiatePlugin(QString identifier, float inputSampleRate) { Profiler profiler("FeatureExtractionPluginFactory::instantiatePlugin"); Vamp::Plugin *rv = 0; Vamp::PluginHostAdapter *plugin = 0; const VampPluginDescriptor *descriptor = 0; int index = 0; QString type, soname, label; PluginIdentifier::parseIdentifier(identifier, type, soname, label); if (type != "vamp") { SVDEBUG << "FeatureExtractionPluginFactory::instantiatePlugin: Wrong factory for plugin type " << type << endl; return 0; } QString found = findPluginFile(soname); if (found == "") { cerr << "FeatureExtractionPluginFactory::instantiatePlugin: Failed to find library file " << soname << endl; return 0; } else if (found != soname) { #ifdef DEBUG_PLUGIN_SCAN_AND_INSTANTIATE SVDEBUG << "FeatureExtractionPluginFactory::instantiatePlugin: Given library name was " << soname << ", found at " << found << endl; cerr << soname << " -> " << found << endl; #endif } soname = found; void *libraryHandle = DLOPEN(soname, RTLD_LAZY | RTLD_LOCAL); if (!libraryHandle) { cerr << "FeatureExtractionPluginFactory::instantiatePlugin: Failed to load library " << soname << ": " << DLERROR() << endl; return 0; } VampGetPluginDescriptorFunction fn = (VampGetPluginDescriptorFunction) DLSYM(libraryHandle, "vampGetPluginDescriptor"); if (!fn) { SVDEBUG << "FeatureExtractionPluginFactory::instantiatePlugin: No descriptor function in " << soname << endl; goto done; } while ((descriptor = fn(VAMP_API_VERSION, index))) { if (label == descriptor->identifier) break; ++index; } if (!descriptor) { cerr << "FeatureExtractionPluginFactory::instantiatePlugin: Failed to find plugin \"" << label << "\" in library " << soname << endl; goto done; } plugin = new Vamp::PluginHostAdapter(descriptor, inputSampleRate); if (plugin) { m_handleMap[plugin] = libraryHandle; rv = new PluginDeletionNotifyAdapter(plugin, this); } // SVDEBUG << "FeatureExtractionPluginFactory::instantiatePlugin: Constructed Vamp plugin, rv is " << rv << endl; //!!! need to dlclose() when plugins from a given library are unloaded done: if (!rv) { if (DLCLOSE(libraryHandle) != 0) { cerr << "WARNING: FeatureExtractionPluginFactory::instantiatePlugin: Failed to unload library " << soname << endl; } } // SVDEBUG << "FeatureExtractionPluginFactory::instantiatePlugin: Instantiated plugin " << label << " from library " << soname << ": descriptor " << descriptor << ", rv "<< rv << ", label " << rv->getName() << ", outputs " << rv->getOutputDescriptors().size() << endl; return rv; } void FeatureExtractionPluginFactory::pluginDeleted(Vamp::Plugin *plugin) { void *handle = m_handleMap[plugin]; if (handle) { // SVDEBUG << "unloading library " << handle << " for plugin " << plugin << endl; DLCLOSE(handle); } m_handleMap.erase(plugin); } QString FeatureExtractionPluginFactory::getPluginCategory(QString identifier) { return m_taxonomy[identifier]; } void FeatureExtractionPluginFactory::generateTaxonomy() { std::vector<QString> pluginPath = getPluginPath(); std::vector<QString> path; for (size_t i = 0; i < pluginPath.size(); ++i) { if (pluginPath[i].contains("/lib/")) { QString p(pluginPath[i]); path.push_back(p); p.replace("/lib/", "/share/"); path.push_back(p); } path.push_back(pluginPath[i]); } for (size_t i = 0; i < path.size(); ++i) { QDir dir(path[i], "*.cat"); // SVDEBUG << "LADSPAPluginFactory::generateFallbackCategories: directory " << path[i] << " has " << dir.count() << " .cat files" << endl; for (unsigned int j = 0; j < dir.count(); ++j) { QFile file(path[i] + "/" + dir[j]); // SVDEBUG << "LADSPAPluginFactory::generateFallbackCategories: about to open " << (path[i]+ "/" + dir[j]) << endl; if (file.open(QIODevice::ReadOnly)) { // cerr << "...opened" << endl; QTextStream stream(&file); QString line; while (!stream.atEnd()) { line = stream.readLine(); // cerr << "line is: \"" << line << "\"" << endl; QString id = PluginIdentifier::canonicalise (line.section("::", 0, 0)); QString cat = line.section("::", 1, 1); m_taxonomy[id] = cat; // cerr << "FeatureExtractionPluginFactory: set id \"" << id << "\" to cat \"" << cat << "\"" << endl; } } } } }