annotate plugin/NativeVampPluginFactory.cpp @ 1247:8f076d02569a piper

Make SVDEBUG always write to a log file -- formerly this was disabled in NDEBUG builds. I think there's little use to that, it just means that we keep adding more cerr debug output because we aren't getting the log we need. And SVDEBUG logging is not usually used in tight loops, I don't think the performance overhead is too serious.

Also update the About box.

/* -*- 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 2006-2016 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 "NativeVampPluginFactory.h"
#include "PluginIdentifier.h"

#include <vamp-hostsdk/PluginHostAdapter.h>
#include <vamp-hostsdk/PluginWrapper.h>

#include "system/System.h"

#include "PluginScan.h"

#include <QDir>
#include <QFile>
#include <QFileInfo>
#include <QTextStream>

#include <iostream>

#include "base/Profiler.h"

#include <QMutex>
#include <QMutexLocker>

using namespace std;

//#define DEBUG_PLUGIN_SCAN_AND_INSTANTIATE 1

class PluginDeletionNotifyAdapter : public Vamp::HostExt::PluginWrapper {
public:
    PluginDeletionNotifyAdapter(Vamp::Plugin *plugin,
                                NativeVampPluginFactory *factory) :
        PluginWrapper(plugin), m_factory(factory) { }
    virtual ~PluginDeletionNotifyAdapter();
protected:
    NativeVampPluginFactory *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;
    // acceptable use after free here, as pluginDeleted uses p only as
    // pointer key and does not deref it
    if (m_factory) m_factory->pluginDeleted(p);
}

vector<QString>
NativeVampPluginFactory::getPluginPath()
{
    if (!m_pluginPath.empty()) return m_pluginPath;

    vector<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;
}

vector<QString>
NativeVampPluginFactory::getPluginIdentifiers(QString &)
{
    Profiler profiler("NativeVampPluginFactory::getPluginIdentifiers");

    QMutexLocker locker(&m_mutex);

    if (!m_identifiers.empty()) {
        return m_identifiers;
    }
    
    auto candidates = PluginScan::getInstance()->getCandidateLibrariesFor
        (PluginScan::VampPlugin);
    
    for (auto candidate : candidates) {

        QString soname = candidate.libraryPath;

        void *libraryHandle = DLOPEN(soname, RTLD_LAZY | RTLD_LOCAL);
            
        if (!libraryHandle) {
            SVDEBUG << "WARNING: NativeVampPluginFactory::getPluginIdentifiers: Failed to load library " << soname << ": " << DLERROR() << endl;
            continue;
        }

        VampGetPluginDescriptorFunction fn = (VampGetPluginDescriptorFunction)
            DLSYM(libraryHandle, "vampGetPluginDescriptor");

        if (!fn) {
            SVDEBUG << "WARNING: NativeVampPluginFactory::getPluginIdentifiers: No descriptor function in " << soname << endl;
            if (DLCLOSE(libraryHandle) != 0) {
                SVDEBUG << "WARNING: NativeVampPluginFactory::getPluginIdentifiers: Failed to unload library " << soname << endl;
            }
            continue;
        }

#ifdef DEBUG_PLUGIN_SCAN_AND_INSTANTIATE
            cerr << "NativeVampPluginFactory::getPluginIdentifiers: Vamp descriptor found" << endl;
#endif

        const VampPluginDescriptor *descriptor = 0;
        int index = 0;

        map<string, int> known;
        bool ok = true;

        while ((descriptor = fn(VAMP_API_VERSION, index))) {

            if (known.find(descriptor->identifier) != known.end()) {
                SVDEBUG << "WARNING: NativeVampPluginFactory::getPluginIdentifiers: Plugin library "
                     << soname
                     << " returns the same plugin identifier \""
                     << descriptor->identifier << "\" at indices "
                     << known[descriptor->identifier] << " and "
                     << index << endl;
                    SVDEBUG << "NativeVampPluginFactory::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);
                m_identifiers.push_back(id);
#ifdef DEBUG_PLUGIN_SCAN_AND_INSTANTIATE
                cerr << "NativeVampPluginFactory::getPluginIdentifiers: Found plugin id " << id << " at index " << index << endl;
#endif
                ++index;
            }
        }
            
        if (DLCLOSE(libraryHandle) != 0) {
            SVDEBUG << "WARNING: NativeVampPluginFactory::getPluginIdentifiers: Failed to unload library " << soname << endl;
        }
    }

    generateTaxonomy();

    // Plugins can change the locale, revert it to default.
    RestoreStartupLocale();

    return m_identifiers;
}

QString
NativeVampPluginFactory::findPluginFile(QString soname, QString inDir)
{
    QString file = "";

#ifdef DEBUG_PLUGIN_SCAN_AND_INSTANTIATE
    cerr << "NativeVampPluginFactory::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
            cerr << "NativeVampPluginFactory::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
                cerr << "NativeVampPluginFactory::findPluginFile: "
                          << "found \"" << soname << "\" at " << file << endl;
#endif

                return file;
            }
        }

#ifdef DEBUG_PLUGIN_SCAN_AND_INSTANTIATE
        cerr << "NativeVampPluginFactory::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
            cerr << "NativeVampPluginFactory::findPluginFile: "
                      << "found trivially at " << soname << endl;
#endif
            return soname;
        }

        if (fi.isAbsolute() && fi.absolutePath() != "") {
            file = findPluginFile(soname, fi.absolutePath());
            if (file != "") return file;
        }

        vector<QString> path = getPluginPath();
        for (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
        cerr << "NativeVampPluginFactory::findPluginFile: "
                  << "not found" << endl;
#endif

        return "";
    }
}

Vamp::Plugin *
NativeVampPluginFactory::instantiatePlugin(QString identifier,
                                           sv_samplerate_t inputSampleRate)
{
    Profiler profiler("NativeVampPluginFactory::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") {
#ifdef DEBUG_PLUGIN_SCAN_AND_INSTANTIATE
        cerr << "NativeVampPluginFactory::instantiatePlugin: Wrong factory for plugin type " << type << endl;
#endif
	return 0;
    }

    QString found = findPluginFile(soname);

    if (found == "") {
        SVDEBUG << "NativeVampPluginFactory::instantiatePlugin: Failed to find library file " << soname << endl;
        return 0;
    } else if (found != soname) {

#ifdef DEBUG_PLUGIN_SCAN_AND_INSTANTIATE
        cerr << "NativeVampPluginFactory::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) {
        SVDEBUG << "NativeVampPluginFactory::instantiatePlugin: Failed to load library " << soname << ": " << DLERROR() << endl;
        return 0;
    }

    VampGetPluginDescriptorFunction fn = (VampGetPluginDescriptorFunction)
        DLSYM(libraryHandle, "vampGetPluginDescriptor");
    
    if (!fn) {
        SVDEBUG << "NativeVampPluginFactory::instantiatePlugin: No descriptor function in " << soname << endl;
        goto done;
    }

    while ((descriptor = fn(VAMP_API_VERSION, index))) {
        if (label == descriptor->identifier) break;
        ++index;
    }

    if (!descriptor) {
        SVDEBUG << "NativeVampPluginFactory::instantiatePlugin: Failed to find plugin \"" << label << "\" in library " << soname << endl;
        goto done;
    }

    plugin = new Vamp::PluginHostAdapter(descriptor, float(inputSampleRate));

    if (plugin) {
        m_handleMap[plugin] = libraryHandle;
        rv = new PluginDeletionNotifyAdapter(plugin, this);
    }

//    SVDEBUG << "NativeVampPluginFactory::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) {
            SVDEBUG << "WARNING: NativeVampPluginFactory::instantiatePlugin: Failed to unload library " << soname << endl;
        }
    }

#ifdef DEBUG_PLUGIN_SCAN_AND_INSTANTIATE
    cerr << "NativeVampPluginFactory::instantiatePlugin: Instantiated plugin " << label << " from library " << soname << ": descriptor " << descriptor << ", rv "<< rv << ", label " << rv->getName() << ", outputs " << rv->getOutputDescriptors().size() << endl;
#endif
    
    return rv;
}

void
NativeVampPluginFactory::pluginDeleted(Vamp::Plugin *plugin)
{
    void *handle = m_handleMap[plugin];
    if (handle) {
#ifdef DEBUG_PLUGIN_SCAN_AND_INSTANTIATE
        cerr << "unloading library " << handle << " for plugin " << plugin << endl;
#endif
        DLCLOSE(handle);
    }
    m_handleMap.erase(plugin);
}

QString
NativeVampPluginFactory::getPluginCategory(QString identifier)
{
    return m_taxonomy[identifier];
}

void
NativeVampPluginFactory::generateTaxonomy()
{
    vector<QString> pluginPath = getPluginPath();
    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 << "NativeVampPluginFactory: set id \"" << id << "\" to cat \"" << cat << "\"" << endl;
		}
	    }
	}
    }
}    

piper_vamp::PluginStaticData
NativeVampPluginFactory::getPluginStaticData(QString identifier)
{
    QMutexLocker locker(&m_mutex);

    if (m_pluginData.find(identifier) != m_pluginData.end()) {
        return m_pluginData[identifier];
    }
    
    QString type, soname, label;
    PluginIdentifier::parseIdentifier(identifier, type, soname, label);
    std::string pluginKey = (soname + ":" + label).toStdString();

    std::vector<std::string> catlist;
    for (auto s: getPluginCategory(identifier).split(" > ")) {
        catlist.push_back(s.toStdString());
    }
    
    Vamp::Plugin *p = instantiatePlugin(identifier, 44100);
    if (!p) return {};

    auto psd = piper_vamp::PluginStaticData::fromPlugin(pluginKey,
                                                        catlist,
                                                        p);

    delete p;
    
    m_pluginData[identifier] = psd;
    return psd;
}