diff plugin/FeatureExtractionPluginFactory.cpp @ 0:fc9323a41f5a

start base : Sonic Visualiser sv1-1.0rc1

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/plugin/FeatureExtractionPluginFactory.cpp	Fri May 11 09:08:14 2007 +0000
@@ -0,0 +1,399 @@
+/* -*- 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/vamp.h"
+#include "vamp-sdk/PluginHostAdapter.h"
+
+#include "system/System.h"
+
+#include <QDir>
+#include <QFile>
+#include <QFileInfo>
+#include <QTextStream>
+
+#include <iostream>
+
+//#define DEBUG_PLUGIN_SCAN_AND_INSTANTIATE 1
+
+static FeatureExtractionPluginFactory *_nativeInstance = 0;
+
+FeatureExtractionPluginFactory *
+FeatureExtractionPluginFactory::instance(QString pluginType)
+{
+    if (pluginType == "vamp") {
+	if (!_nativeInstance) {
+//	    std::cerr << "FeatureExtractionPluginFactory::instance(" << pluginType.toStdString()
+//		      << "): creating new FeatureExtractionPluginFactory" << std::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) {
+	    rv.push_back(tmp[i]);
+	}
+    }
+
+    // Plugins can change the locale, revert it to default.
+    setlocale(LC_ALL, "C");
+    return rv;
+}
+
+std::vector<QString>
+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
+        std::cerr << "FeatureExtractionPluginFactory::getPluginIdentifiers: scanning directory " << i->toStdString() << std::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
+            std::cerr << "FeatureExtractionPluginFactory::getPluginIdentifiers: trying potential library " << soname.toStdString() << std::endl;
+#endif
+
+            void *libraryHandle = DLOPEN(soname, RTLD_LAZY);
+            
+            if (!libraryHandle) {
+                std::cerr << "WARNING: FeatureExtractionPluginFactory::getPluginIdentifiers: Failed to load library " << soname.toStdString() << ": " << DLERROR() << std::endl;
+                continue;
+            }
+
+#ifdef DEBUG_PLUGIN_SCAN_AND_INSTANTIATE
+            std::cerr << "FeatureExtractionPluginFactory::getPluginIdentifiers: It's a library all right, checking for descriptor" << std::endl;
+#endif
+
+            VampGetPluginDescriptorFunction fn = (VampGetPluginDescriptorFunction)
+                DLSYM(libraryHandle, "vampGetPluginDescriptor");
+
+            if (!fn) {
+                std::cerr << "WARNING: FeatureExtractionPluginFactory::getPluginIdentifiers: No descriptor function in " << soname.toStdString() << std::endl;
+                if (DLCLOSE(libraryHandle) != 0) {
+                    std::cerr << "WARNING: FeatureExtractionPluginFactory::getPluginIdentifiers: Failed to unload library " << soname.toStdString() << std::endl;
+                }
+                continue;
+            }
+
+#ifdef DEBUG_PLUGIN_SCAN_AND_INSTANTIATE
+            std::cerr << "FeatureExtractionPluginFactory::getPluginIdentifiers: Vamp descriptor found" << std::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()) {
+                    std::cerr << "WARNING: FeatureExtractionPluginFactory::getPluginIdentifiers: Plugin library "
+                              << soname.toStdString()
+                              << " returns the same plugin identifier \""
+                              << descriptor->identifier << "\" at indices "
+                              << known[descriptor->identifier] << " and "
+                              << index << std::endl;
+                    std::cerr << "FeatureExtractionPluginFactory::getPluginIdentifiers: Avoiding this library (obsolete API?)" << std::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
+                    std::cerr << "FeatureExtractionPluginFactory::getPluginIdentifiers: Found plugin id " << id.toStdString() << " at index " << index << std::endl;
+#endif
+                    ++index;
+                }
+            }
+            
+            if (DLCLOSE(libraryHandle) != 0) {
+                std::cerr << "WARNING: FeatureExtractionPluginFactory::getPluginIdentifiers: Failed to unload library " << soname.toStdString() << std::endl;
+            }
+	}
+    }
+
+    generateTaxonomy();
+
+    return rv;
+}
+
+QString
+FeatureExtractionPluginFactory::findPluginFile(QString soname, QString inDir)
+{
+    QString file = "";
+
+#ifdef DEBUG_PLUGIN_SCAN_AND_INSTANTIATE
+    std::cerr << "FeatureExtractionPluginFactory::findPluginFile(\""
+              << soname.toStdString() << "\", \"" << inDir.toStdString() << "\")"
+              << std::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
+            std::cerr << "FeatureExtractionPluginFactory::findPluginFile: "
+                      << "found trivially at " << file.toStdString() << std::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
+                std::cerr << "FeatureExtractionPluginFactory::findPluginFile: "
+                          << "found at " << file.toStdString() << std::endl;
+#endif
+
+                return file;
+            }
+        }
+
+#ifdef DEBUG_PLUGIN_SCAN_AND_INSTANTIATE
+        std::cerr << "FeatureExtractionPluginFactory::findPluginFile (with dir): "
+                  << "not found" << std::endl;
+#endif
+
+        return "";
+
+    } else {
+
+        QFileInfo fi(soname);
+
+        if (fi.isAbsolute() && fi.exists() && fi.isFile()) {
+#ifdef DEBUG_PLUGIN_SCAN_AND_INSTANTIATE
+            std::cerr << "FeatureExtractionPluginFactory::findPluginFile: "
+                      << "found trivially at " << soname.toStdString() << std::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
+        std::cerr << "FeatureExtractionPluginFactory::findPluginFile: "
+                  << "not found" << std::endl;
+#endif
+
+        return "";
+    }
+}
+
+Vamp::Plugin *
+FeatureExtractionPluginFactory::instantiatePlugin(QString identifier,
+						  float inputSampleRate)
+{
+    Vamp::Plugin *rv = 0;
+
+    const VampPluginDescriptor *descriptor = 0;
+    int index = 0;
+
+    QString type, soname, label;
+    PluginIdentifier::parseIdentifier(identifier, type, soname, label);
+    if (type != "vamp") {
+	std::cerr << "FeatureExtractionPluginFactory::instantiatePlugin: Wrong factory for plugin type " << type.toStdString() << std::endl;
+	return 0;
+    }
+
+    QString found = findPluginFile(soname);
+
+    if (found == "") {
+        std::cerr << "FeatureExtractionPluginFactory::instantiatePlugin: Failed to find library file " << soname.toStdString() << std::endl;
+        return 0;
+    } else if (found != soname) {
+
+#ifdef DEBUG_PLUGIN_SCAN_AND_INSTANTIATE
+        std::cerr << "FeatureExtractionPluginFactory::instantiatePlugin: Given library name was " << soname.toStdString() << ", found at " << found.toStdString() << std::endl;
+        std::cerr << soname.toStdString() << " -> " << found.toStdString() << std::endl;
+#endif
+
+    }        
+
+    soname = found;
+
+    void *libraryHandle = DLOPEN(soname, RTLD_LAZY);
+            
+    if (!libraryHandle) {
+        std::cerr << "FeatureExtractionPluginFactory::instantiatePlugin: Failed to load library " << soname.toStdString() << ": " << DLERROR() << std::endl;
+        return 0;
+    }
+
+    VampGetPluginDescriptorFunction fn = (VampGetPluginDescriptorFunction)
+        DLSYM(libraryHandle, "vampGetPluginDescriptor");
+    
+    if (!fn) {
+        std::cerr << "FeatureExtractionPluginFactory::instantiatePlugin: No descriptor function in " << soname.toStdString() << std::endl;
+        goto done;
+    }
+
+    while ((descriptor = fn(VAMP_API_VERSION, index))) {
+        if (label == descriptor->identifier) break;
+        ++index;
+    }
+
+    if (!descriptor) {
+        std::cerr << "FeatureExtractionPluginFactory::instantiatePlugin: Failed to find plugin \"" << label.toStdString() << "\" in library " << soname.toStdString() << std::endl;
+        goto done;
+    }
+
+    rv = new Vamp::PluginHostAdapter(descriptor, inputSampleRate);
+
+//    std::cerr << "FeatureExtractionPluginFactory::instantiatePlugin: Constructed Vamp plugin, rv is " << rv << std::endl;
+
+    //!!! need to dlclose() when plugins from a given library are unloaded
+
+done:
+    if (!rv) {
+        if (DLCLOSE(libraryHandle) != 0) {
+            std::cerr << "WARNING: FeatureExtractionPluginFactory::instantiatePlugin: Failed to unload library " << soname.toStdString() << std::endl;
+        }
+    }
+
+//    std::cerr << "FeatureExtractionPluginFactory::instantiatePlugin: Instantiated plugin " << label.toStdString() << " from library " << soname.toStdString() << ": descriptor " << descriptor << ", rv "<< rv << ", label " << rv->getName() << ", outputs " << rv->getOutputDescriptors().size() << std::endl;
+    
+    return rv;
+}
+
+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");
+
+//	std::cerr << "LADSPAPluginFactory::generateFallbackCategories: directory " << path[i].toStdString() << " has " << dir.count() << " .cat files" << std::endl;
+	for (unsigned int j = 0; j < dir.count(); ++j) {
+
+	    QFile file(path[i] + "/" + dir[j]);
+
+//	    std::cerr << "LADSPAPluginFactory::generateFallbackCategories: about to open " << (path[i].toStdString() + "/" + dir[j].toStdString()) << std::endl;
+
+	    if (file.open(QIODevice::ReadOnly)) {
+//		    std::cerr << "...opened" << std::endl;
+		QTextStream stream(&file);
+		QString line;
+
+		while (!stream.atEnd()) {
+		    line = stream.readLine();
+//		    std::cerr << "line is: \"" << line.toStdString() << "\"" << std::endl;
+		    QString id = PluginIdentifier::canonicalise
+                        (line.section("::", 0, 0));
+		    QString cat = line.section("::", 1, 1);
+		    m_taxonomy[id] = cat;
+//		    std::cerr << "FeatureExtractionPluginFactory: set id \"" << id.toStdString() << "\" to cat \"" << cat.toStdString() << "\"" << std::endl;
+		}
+	    }
+	}
+    }
+}