view plugin/PluginXml.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 Chris Cannam.
    
    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 "PluginXml.h"

#include <QRegExp>
#include <QXmlAttributes>

#include <QDomDocument>
#include <QDomElement>
#include <QDomNamedNodeMap>
#include <QDomAttr>

#include <QTextStream>

#include <vamp-hostsdk/PluginBase.h>
#include "RealTimePluginInstance.h"

#include <iostream>

PluginXml::PluginXml(Vamp::PluginBase *plugin) :
    m_plugin(plugin)
{
}

PluginXml::~PluginXml() { }

QString
PluginXml::encodeConfigurationChars(QString text)
{
    QString rv(text);
    rv.replace(";", "[[SEMICOLON]]");
    rv.replace("=", "[[EQUALS]]");
    return rv;
}

QString
PluginXml::decodeConfigurationChars(QString text)
{
    QString rv(text);
    rv.replace("[[SEMICOLON]]", ";");
    rv.replace("[[EQUALS]]", "=");
    return rv;
}
    
void
PluginXml::toXml(QTextStream &stream,
                 QString indent, QString extraAttributes) const
{
    stream << indent;

    stream << QString("<plugin identifier=\"%1\" name=\"%2\" description=\"%3\" maker=\"%4\" version=\"%5\" copyright=\"%6\" %7 ")
        .arg(encodeEntities(QString(m_plugin->getIdentifier().c_str())))
        .arg(encodeEntities(QString(m_plugin->getName().c_str())))
        .arg(encodeEntities(QString(m_plugin->getDescription().c_str())))
        .arg(encodeEntities(QString(m_plugin->getMaker().c_str())))
        .arg(m_plugin->getPluginVersion())
        .arg(encodeEntities(QString(m_plugin->getCopyright().c_str())))
        .arg(extraAttributes);

    if (!m_plugin->getPrograms().empty()) {
        stream << QString("program=\"%1\" ")
            .arg(encodeEntities(m_plugin->getCurrentProgram().c_str()));
    }

    Vamp::PluginBase::ParameterList parameters =
        m_plugin->getParameterDescriptors();

    for (Vamp::PluginBase::ParameterList::const_iterator i = parameters.begin();
         i != parameters.end(); ++i) {

//        SVDEBUG << "PluginXml::toXml: parameter name \""
//                  << i->name.c_str() << "\" has value "
//                  << m_plugin->getParameter(i->name) << endl;

        stream << QString("param-%1=\"%2\" ")
            .arg(stripInvalidParameterNameCharacters(QString(i->identifier.c_str())))
            .arg(m_plugin->getParameter(i->identifier));
    }

    RealTimePluginInstance *rtpi =
        dynamic_cast<RealTimePluginInstance *>(m_plugin);
    if (rtpi) {
        std::map<std::string, std::string> configurePairs =
            rtpi->getConfigurePairs();
        QString config;
        for (std::map<std::string, std::string>::iterator i = configurePairs.begin();
             i != configurePairs.end(); ++i) {
            QString key = i->first.c_str();
            QString value = i->second.c_str();
            key = encodeConfigurationChars(key);
            value = encodeConfigurationChars(value);
            if (config != "") config += ";";
            config += QString("%1=%2").arg(key).arg(value);
        }
        if (config != "") {
            stream << QString("configuration=\"%1\" ")
                .arg(encodeEntities(config));
        }
    }

    stream << "/>\n";
}

#define CHECK_ATTRIBUTE(ATTRIBUTE, ACCESSOR) \
    QString ATTRIBUTE = attrs.value(#ATTRIBUTE); \
    if (ATTRIBUTE != "" && ATTRIBUTE != ACCESSOR().c_str()) { \
        cerr << "WARNING: PluginXml::setParameters: Plugin " \
                  << #ATTRIBUTE << " does not match (attributes have \"" \
                  << ATTRIBUTE << "\", my " \
                  << #ATTRIBUTE << " is \"" << ACCESSOR() << "\")" << endl; \
    }

void
PluginXml::setParameters(const QXmlAttributes &attrs)
{
    CHECK_ATTRIBUTE(identifier, m_plugin->getIdentifier);
    CHECK_ATTRIBUTE(name, m_plugin->getName);
    CHECK_ATTRIBUTE(description, m_plugin->getDescription);
    CHECK_ATTRIBUTE(maker, m_plugin->getMaker);
    CHECK_ATTRIBUTE(copyright, m_plugin->getCopyright);

    bool ok;
    int version = attrs.value("version").trimmed().toInt(&ok);
    if (ok && version != m_plugin->getPluginVersion()) {
        cerr << "WARNING: PluginXml::setParameters: Plugin version does not match (attributes have " << version << ", my version is " << m_plugin->getPluginVersion() << ")" << endl;
    }

    RealTimePluginInstance *rtpi =
        dynamic_cast<RealTimePluginInstance *>(m_plugin);
    if (rtpi) {
        QString config = attrs.value("configuration");
        if (config != "") {
            QStringList configList = config.split(";");
            for (QStringList::iterator i = configList.begin();
                 i != configList.end(); ++i) {
                QStringList kv = i->split("=");
                if (kv.count() < 2) {
                    cerr << "WARNING: PluginXml::setParameters: Malformed configure pair string: \"" << *i << "\"" << endl;
                    continue;
                }
                QString key(kv[0]), value(kv[1]);
                key = decodeConfigurationChars(key);
                value = decodeConfigurationChars(value);
                rtpi->configure(key.toStdString(), value.toStdString());
            }
        }
    }

    if (!m_plugin->getPrograms().empty()) {
        m_plugin->selectProgram(attrs.value("program").toStdString());
    }

    Vamp::PluginBase::ParameterList parameters =
        m_plugin->getParameterDescriptors();

    for (Vamp::PluginBase::ParameterList::const_iterator i =
             parameters.begin(); i != parameters.end(); ++i) {

        QString pname = QString("param-%1")
            .arg(stripInvalidParameterNameCharacters
                 (QString(i->identifier.c_str())));

        if (attrs.value(pname) == "") {
//            SVDEBUG << "PluginXml::setParameters: no parameter \"" << i->name << "\" (attribute \"" << name << "\")" << endl;
            continue;
        }

        bool ok;
        float value = attrs.value(pname).trimmed().toFloat(&ok);
        if (ok) {
//            SVDEBUG << "PluginXml::setParameters: setting parameter \""
//                      << i->identifier << "\" to value " << value << endl;
            m_plugin->setParameter(i->identifier, value);
        } else {
            cerr << "WARNING: PluginXml::setParameters: Invalid value \"" << attrs.value(pname) << "\" for parameter \"" << i->identifier << "\" (attribute \"" << pname << "\")" << endl;
        }
    }
}

void
PluginXml::setParametersFromXml(QString xml)
{
    QDomDocument doc;

    QString error;
    int errorLine;
    int errorColumn;

//    SVDEBUG << "PluginXml::setParametersFromXml: XML is \""
//              << xml << "\"" << endl;

    if (!doc.setContent(xml, false, &error, &errorLine, &errorColumn)) {
        cerr << "PluginXml::setParametersFromXml: Error in parsing XML: " << error << " at line " << errorLine << ", column " << errorColumn << endl;
        cerr << "Input follows:" << endl;
        cerr << xml << endl;
        cerr << "Input ends." << endl;
        return;
    }

    QDomElement pluginElt = doc.firstChildElement("plugin");
    QDomNamedNodeMap attrNodes = pluginElt.attributes();
    QXmlAttributes attrs;

    for (int i = 0; i < attrNodes.length(); ++i) {
        QDomAttr attr = attrNodes.item(i).toAttr();
        if (attr.isNull()) continue;
//        SVDEBUG << "PluginXml::setParametersFromXml: Adding attribute \"" << attr.name()//                  << "\" with value \"" << attr.value() << "\"" << endl;
        attrs.append(attr.name(), "", "", attr.value());
    }

    setParameters(attrs);
}

QString
PluginXml::stripInvalidParameterNameCharacters(QString s) const
{
    s.replace(QRegExp("[^a-zA-Z0-9_]*"), "");
    return s;
}