view plugin/PluginXml.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 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;
}