Chris@154: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
Chris@154: 
Chris@154: /*
Chris@154:     Sonic Visualiser
Chris@154:     An audio file viewer and annotation editor.
Chris@154: 
Chris@154:     Sonic Annotator
Chris@154:     A utility for batch feature extraction from audio files.
Chris@154: 
Chris@154:     Mark Levy, Chris Sutton and Chris Cannam, Queen Mary, University of London.
Chris@154:     Copyright 2007-2008 QMUL.
Chris@154: 
Chris@154:     This program is free software; you can redistribute it and/or
Chris@154:     modify it under the terms of the GNU General Public License as
Chris@154:     published by the Free Software Foundation; either version 2 of the
Chris@154:     License, or (at your option) any later version.  See the file
Chris@154:     COPYING included with this distribution for more information.
Chris@154: */
Chris@154: 
Chris@154: #include "LabFeatureWriter.h"
Chris@154: 
Chris@154: #include <iostream>
Chris@154: 
Chris@154: #include <QRegExp>
Chris@154: #include <QTextStream>
Chris@189: #include <QTextCodec>
Chris@154: 
Chris@154: using namespace std;
Chris@154: using namespace Vamp;
Chris@154: 
Chris@154: LabFeatureWriter::LabFeatureWriter() :
Chris@154:     FileFeatureWriter(SupportOneFilePerTrackTransform |
Chris@154:                       SupportStdOut,
Chris@154:                       "lab"),
Chris@154:     m_forceEnd(false)
Chris@154: {
Chris@154: }
Chris@154: 
Chris@154: LabFeatureWriter::~LabFeatureWriter()
Chris@154: {
Chris@154: }
Chris@154: 
Chris@154: string
Chris@154: LabFeatureWriter::getDescription() const
Chris@154: {
Chris@159:     return "Write features in .lab, a tab-separated columnar format. The first column is always the feature start time in seconds. If the features have duration, the second column will be the feature end time in seconds. Remaining columns are the feature values (if any) and finally the feature label (if any). There is no identification of the audio file or the transform, so confusion will result if features from different audio or transforms are mixed. (For more control over the output, consider using the more general CSV writer.)";
Chris@154: }
Chris@154: 
Chris@154: LabFeatureWriter::ParameterList
Chris@154: LabFeatureWriter::getSupportedParameters() const
Chris@154: {
Chris@154:     ParameterList pl = FileFeatureWriter::getSupportedParameters();
Chris@154: 
Chris@154:     Parameter p;
Chris@154: 
Chris@154:     p.name = "fill-ends";
Chris@154:     p.description = "Include end times even for features without duration, by using the gap to the next feature instead.";
Chris@154:     p.hasArg = false;
Chris@154:     pl.push_back(p);
Chris@154: 
Chris@154:     return pl;
Chris@154: }
Chris@154: 
Chris@154: void
Chris@154: LabFeatureWriter::setParameters(map<string, string> &params)
Chris@154: {
Chris@154:     FileFeatureWriter::setParameters(params);
Chris@154: 
Chris@154:     for (map<string, string>::iterator i = params.begin();
Chris@154:          i != params.end(); ++i) {
Chris@154:         if (i->first == "fill-ends") {
Chris@154:             m_forceEnd = true;
Chris@154:         }
Chris@154:     }
Chris@154: }
Chris@154: 
Chris@154: void
Chris@154: LabFeatureWriter::write(QString trackId,
Chris@154:                         const Transform &transform,
Chris@154:                         const Plugin::OutputDescriptor& ,
Chris@154:                         const Plugin::FeatureList& features,
Chris@157:                         std::string)
Chris@154: {
Chris@154:     // Select appropriate output file for our track/transform
Chris@154:     // combination
Chris@154: 
Chris@157:     TransformId transformId = transform.getIdentifier();
Chris@157: 
Chris@189:     QTextStream *sptr = getOutputStream
Chris@189:         (trackId, transformId, QTextCodec::codecForName("UTF-8"));
Chris@154:     if (!sptr) {
Chris@157:         throw FailedToOpenOutputStream(trackId, transformId);
Chris@154:     }
Chris@154: 
Chris@154:     QTextStream &stream = *sptr;
Chris@154: 
Chris@157:     int n = features.size();
Chris@154: 
Chris@157:     if (n == 0) return;
Chris@154: 
Chris@176:     DataId tt(trackId, transform);
Chris@154: 
Chris@157:     if (m_pending.find(tt) != m_pending.end()) {
Chris@157:         writeFeature(stream, m_pending[tt], &features[0]);
Chris@157:         m_pending.erase(tt);
Chris@157:     }
Chris@154: 
Chris@157:     if (m_forceEnd) {
Chris@157:         // can't write final feature until we know its end time
Chris@157:         --n;
Chris@157:         m_pending[tt] = features[n];
Chris@157:     }
Chris@154: 
Chris@157:     for (int i = 0; i < n; ++i) {
Chris@157:         writeFeature(stream, features[i], m_forceEnd ? &features[i+1] : 0);
Chris@154:     }
Chris@154: }
Chris@154: 
Chris@157: void
Chris@157: LabFeatureWriter::finish()
Chris@157: {
Chris@157:     for (PendingFeatures::const_iterator i = m_pending.begin();
Chris@157:          i != m_pending.end(); ++i) {
Chris@176:         DataId tt = i->first;
Chris@157:         Plugin::Feature f = i->second;
Chris@189:         QTextStream *sptr = getOutputStream
Chris@189:             (tt.first, tt.second.getIdentifier(),
Chris@189:              QTextCodec::codecForName("UTF-8"));
Chris@157:         if (!sptr) {
Chris@176:             throw FailedToOpenOutputStream(tt.first, tt.second.getIdentifier());
Chris@157:         }
Chris@157:         QTextStream &stream = *sptr;
Chris@157:         // final feature has its own time as end time (we can't
Chris@157:         // reliably determine the end of audio file, and because of
Chris@157:         // the nature of block processing, the feature could even
Chris@157:         // start beyond that anyway)
Chris@157:         writeFeature(stream, f, &f);
Chris@157:     }
Chris@158: 
Chris@158:     m_pending.clear();
Chris@157: }
Chris@154: 
Chris@157: void
Chris@157: LabFeatureWriter::writeFeature(QTextStream &stream,
Chris@157:                                const Plugin::Feature &f,
Chris@157:                                const Plugin::Feature *optionalNextFeature)
Chris@157: {
Chris@157:     QString sep = "\t";
Chris@157: 
Chris@157:     QString timestamp = f.timestamp.toString().c_str();
Chris@157:     timestamp.replace(QRegExp("^ +"), "");
Chris@157:     stream << timestamp;
Chris@157: 
Chris@157:     Vamp::RealTime endTime;
Chris@157:     bool haveEndTime = true;
Chris@157: 
Chris@157:     if (f.hasDuration) {
Chris@157:         endTime = f.timestamp + f.duration;
Chris@157:     } else if (optionalNextFeature) {
Chris@157:         endTime = optionalNextFeature->timestamp;
Chris@157:     } else {
Chris@157:         haveEndTime = false;
Chris@157:     }
Chris@157: 
Chris@157:     if (haveEndTime) {
Chris@157:         QString e = endTime.toString().c_str();
Chris@157:         e.replace(QRegExp("^ +"), "");
Chris@157:         stream << sep << e;
Chris@157:     }
Chris@157:     
Chris@157:     for (unsigned int j = 0; j < f.values.size(); ++j) {
Chris@157:         stream << sep << f.values[j];
Chris@157:     }
Chris@157:     
Chris@157:     if (f.label != "") {
Chris@157:         stream << sep << "\"" << f.label.c_str() << "\"";
Chris@157:     }
Chris@157:     
Chris@157:     stream << "\n";
Chris@157: }
Chris@157: 
Chris@157: