annotate plugin/NativeVampPluginFactory.cpp @ 1520:954d0cf29ca7 import-audio-data

Switch the normalisation option in WritableWaveFileModel from normalising on read to normalising on write, so that the saved file is already normalised and therefore can be read again without having to remember to normalise it

/* -*- 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;
}

static
QList<PluginScan::Candidate>
getCandidateLibraries()
{
#ifdef HAVE_PLUGIN_CHECKER_HELPER
    return PluginScan::getInstance()->getCandidateLibrariesFor
        (PluginScan::VampPlugin);
#else
    auto path = Vamp::PluginHostAdapter::getPluginPath();
    QList<PluginScan::Candidate> candidates;
    for (string dirname: path) {
        SVDEBUG << "NativeVampPluginFactory: scanning directory myself: "
                << dirname << endl;
#if defined(_WIN32)
#define PLUGIN_GLOB "*.dll"
#elif defined(__APPLE__)
#define PLUGIN_GLOB "*.dylib *.so"
#else
#define PLUGIN_GLOB "*.so"
#endif
        QDir dir(dirname.c_str(), PLUGIN_GLOB,
                 QDir::Name | QDir::IgnoreCase,
                 QDir::Files | QDir::Readable);

        for (unsigned int i = 0; i < dir.count(); ++i) {
            QString libpath = dir.filePath(dir[i]);
            candidates.push_back({ libpath, "" });
        }
    }

    return candidates;
#endif
}

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

    QMutexLocker locker(&m_mutex);

    if (!m_identifiers.empty()) {
        return m_identifiers;
    }

    auto candidates = getCandidateLibraries();
    
    SVDEBUG << "INFO: Have " << candidates.size() << " candidate Vamp plugin libraries" << endl;
        
    for (auto candidate : candidates) {

        QString libpath = candidate.libraryPath;

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

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

        if (!fn) {
            SVDEBUG << "WARNING: NativeVampPluginFactory::getPluginIdentifiers: No descriptor function in " << libpath << endl;
            if (DLCLOSE(libraryHandle) != 0) {
                SVDEBUG << "WARNING: NativeVampPluginFactory::getPluginIdentifiers: Failed to unload library " << libpath << 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 "
                        << libpath
                        << " 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", libpath, descriptor->identifier);
                m_identifiers.push_back(id);
                m_libraries[id] = libpath;
#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 " << libpath << 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];
}

QString
NativeVampPluginFactory::getPluginLibraryPath(QString identifier)
{
    return m_libraries[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;
}