view rdf/RDFFeatureWriter.h @ 1196:c7b9c902642f spectrogram-minor-refactor

Fix threshold in spectrogram -- it wasn't working in the last release.
There is a new protocol for this. Formerly the threshold parameter had a
range from -50dB to 0 with the default at -50, and -50 treated internally
as "no threshold". However, there was a hardcoded, hidden internal threshold
for spectrogram colour mapping at -80dB with anything below this being rounded
to zero. Now the threshold parameter has range -81 to -1 with the default
at -80, -81 is treated internally as "no threshold", and there is no hidden
internal threshold. So the default behaviour is the same as before, an
effective -80dB threshold, but it is now possible to change this in both
directions. Sessions reloaded from prior versions may look slightly different
because, if the session says there should be no threshold, there will now
actually be no threshold instead of having the hidden internal one.

Still need to do something in the UI to make it apparent that the -81dB
setting removes the threshold entirely. This is at least no worse than the
previous, also obscured, magic -50dB setting.

/* -*- 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.

    Sonic Annotator
    A utility for batch feature extraction from audio files.

    Mark Levy, Chris Sutton and Chris Cannam, Queen Mary, University of London.
    Copyright 2007-2008 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.
*/

#ifndef _RDF_FEATURE_WRITER_H_
#define _RDF_FEATURE_WRITER_H_

#include <string>
#include <map>
#include <set>

#include <QString>

#include "transform/FileFeatureWriter.h"

#include "PluginRDFDescription.h"

using std::string;
using std::map;
using std::set;
using std::pair;

class QTextStream;
class QFile;

class RDFFeatureWriter : public FileFeatureWriter
{
public:
    RDFFeatureWriter();
    virtual ~RDFFeatureWriter();

    virtual string getDescription() const;

    virtual ParameterList getSupportedParameters() const;
    virtual void setParameters(map<string, string> &params);

    virtual void setTrackMetadata(QString trackid, TrackMetadata metadata);

    virtual void write(QString trackid,
                       const Transform &transform,
                       const Vamp::Plugin::OutputDescriptor &output,
                       const Vamp::Plugin::FeatureList &features,
                       std::string summaryType = "");

    virtual void setFixedEventTypeURI(QString uri); // something of a hack

    virtual void finish();

    virtual QString getWriterTag() const { return "rdf"; }

private:
    typedef map<QString, PluginRDFDescription> RDFDescriptionMap; // by plugin id
    RDFDescriptionMap m_rdfDescriptions;

    typedef map<QString, TrackMetadata> TrackMetadataMap;
    TrackMetadataMap m_metadata;

    bool haveTitleArtistMetadata(QString trackId) const {
        // Formerly in various places we used to test whether a track
        // appeared in the metadata map at all, in order to determine
        // whether it had any associated metadata. That won't work any
        // more because metadata now includes duration, which can
        // appear even if no title/artist are given and which is not
        // something whose presence indicates the involvement of a
        // "publication Track". So check for artist/title explicitly.
        auto mitr = m_metadata.find(trackId);
        if (mitr == m_metadata.end()) return false;
        return (mitr->second.title != "" || mitr->second.maker != "");
    }

    QString m_fixedEventTypeURI;

    virtual void reviewFileForAppending(QString filename);

    void writePrefixes(QTextStream *);
    void writeSignalDescription(QTextStream *, QString);
    void writeLocalFeatureTypes(QTextStream *,
                                const Transform &,
                                const Vamp::Plugin::OutputDescriptor &,
                                PluginRDFDescription &,
                                std::string summaryType);

    void writeSparseRDF(QTextStream *stream,
                        const Transform &transform,
                        const Vamp::Plugin::OutputDescriptor &output,
                        const Vamp::Plugin::FeatureList &features,
                        PluginRDFDescription &desc,
                        QString timelineURI);

    void writeTrackLevelRDF(QTextStream *stream,
                            const Transform &transform,
                            const Vamp::Plugin::OutputDescriptor &output,
                            const Vamp::Plugin::FeatureList &features,
                            PluginRDFDescription &desc,
                            QString signalURI);

    void writeDenseRDF(QTextStream *stream,
                       const Transform &transform,
                       const Vamp::Plugin::OutputDescriptor &output,
                       const Vamp::Plugin::FeatureList &features,
                       PluginRDFDescription &desc,
                       QString signalURI,
                       QString timelineURI);

    set<QString> m_startedTrackIds;

    map<QTextStream *, set<Transform> > m_startedStreamTransforms;

    map<QString, QString> m_trackTrackURIs;
    map<QString, QString> m_trackTimelineURIs;
    map<QString, QString> m_trackSignalURIs;

    map<Transform, QString> m_transformURIs;
    map<Transform, QString> m_syntheticEventTypeURIs;
    map<Transform, QString> m_syntheticSignalTypeURIs;

    typedef pair<QString, Transform> StringTransformPair;
    typedef pair<QTextStream *, QString> StreamBuffer;
    map<StringTransformPair, StreamBuffer> m_openDenseFeatures; // signal URI + transform -> stream + text
    QString m_userAudioFileUri;
    QString m_userTrackUri;
    QString m_userMakerUri;

    bool m_plain;

    bool m_network;
    bool m_networkRetrieved;

    long m_count;
};

#endif