diff plugin/PluginScan.cpp @ 1206:659372323b45 tony-2.0-integration

Merge latest SV 3.0 branch code

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/plugin/PluginScan.cpp	Fri Aug 19 15:58:57 2016 +0100
@@ -0,0 +1,112 @@
+/* -*- 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 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 "PluginScan.h"
+
+#include "base/Debug.h"
+
+#include "checker/knownplugins.h"
+
+#include <QMutex>
+#include <QCoreApplication>
+
+using std::string;
+
+class PluginScan::Logger : public PluginCandidates::LogCallback
+{
+protected:
+    void log(std::string message) {
+        SVDEBUG << "PluginScan: " << message;
+    }
+};
+
+PluginScan *PluginScan::getInstance()
+{
+    static QMutex mutex;
+    static PluginScan *m_instance = 0;
+    mutex.lock();
+    if (!m_instance) m_instance = new PluginScan();
+    mutex.unlock();
+    return m_instance;
+}
+
+PluginScan::PluginScan() : m_kp(0), m_succeeded(false), m_logger(new Logger) {
+}
+
+PluginScan::~PluginScan() {
+    delete m_kp;
+    delete m_logger;
+}
+
+void
+PluginScan::scan(QString helperExecutablePath)
+{
+    delete m_kp;
+    m_succeeded = false;
+    try {
+	m_kp = new KnownPlugins(helperExecutablePath.toStdString(), m_logger);
+	m_succeeded = true;
+    } catch (const std::exception &e) {
+	cerr << "ERROR: PluginScan::scan: " << e.what() << endl;
+	m_kp = 0;
+    }
+}
+
+QStringList
+PluginScan::getCandidateLibrariesFor(PluginType type) const
+{
+    KnownPlugins::PluginType kpt;
+    switch (type) {
+    case VampPlugin: kpt = KnownPlugins::VampPlugin; break;
+    case LADSPAPlugin: kpt = KnownPlugins::LADSPAPlugin; break;
+    case DSSIPlugin: kpt = KnownPlugins::DSSIPlugin; break;
+    default: throw std::logic_error("Inconsistency in plugin type enums");
+    }
+    
+    QStringList candidates;
+    if (!m_kp) return candidates;
+    auto c = m_kp->getCandidateLibrariesFor(kpt);
+    for (auto s: c) candidates.push_back(s.c_str());
+    return candidates;
+}
+
+QString
+PluginScan::getStartupFailureReport() const
+{
+    if (!m_succeeded) {
+	return QObject::tr("<b>Failed to scan for plugins</b>"
+			   "<p>Failed to scan for plugins at startup. Possibly "
+                           "the plugin checker helper program was not correctly "
+                           "installed alongside %1?</p>")
+            .arg(QCoreApplication::applicationName());
+    }
+    if (!m_kp) {
+	return QObject::tr("<b>Did not scan for plugins</b>"
+			   "<p>Apparently no scan for plugins was attempted "
+			   "(internal error?)</p>");
+    }
+
+    string report = m_kp->getFailureReport();
+    if (report == "") {
+	return QString(report.c_str());
+    }
+
+    return QObject::tr("<b>Failed to load plugins</b>"
+		       "<p>Failed to load one or more plugin libraries:</p>")
+	+ QString(report.c_str())
+        + QObject::tr("<p>These plugins may be incompatible with the system, "
+                      "and will be ignored during this run of %1.</p>")
+        .arg(QCoreApplication::applicationName());
+}
+