annotate transform/CSVFeatureWriter.cpp @ 604:4541581067f3

* Better handling of failed-to-open-output-stream situations; ensure CSV
  writer closes files when they're finished rather than when it's finished

/* -*- 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.
*/

#include "CSVFeatureWriter.h"

#include <iostream>

#include <QRegExp>
#include <QTextStream>

using namespace std;
using namespace Vamp;

CSVFeatureWriter::CSVFeatureWriter() :
    FileFeatureWriter(SupportOneFilePerTrackTransform |
                      SupportOneFileTotal,
                      "csv"),
    m_separator(",")
{
}

CSVFeatureWriter::~CSVFeatureWriter()
{
}

CSVFeatureWriter::ParameterList
CSVFeatureWriter::getSupportedParameters() const
{
    ParameterList pl = FileFeatureWriter::getSupportedParameters();
    Parameter p;
    
    p.name = "separator";
    p.description = "Column separator for output.  Default is \",\" (comma).";
    p.hasArg = true;
    pl.push_back(p);

    return pl;
}

void
CSVFeatureWriter::setParameters(map<string, string> &params)
{
    FileFeatureWriter::setParameters(params);

    cerr << "CSVFeatureWriter::setParameters" << endl;
    for (map<string, string>::iterator i = params.begin();
         i != params.end(); ++i) {
        cerr << i->first << " -> " << i->second << endl;
        if (i->first == "separator") {
            m_separator = i->second.c_str();
        }
    }
}

void
CSVFeatureWriter::write(QString trackId,
                        const Transform &transform,
                        const Plugin::OutputDescriptor& output,
                        const Plugin::FeatureList& features,
                        std::string summaryType)
{
    // Select appropriate output file for our track/transform
    // combination

    QTextStream *sptr = getOutputStream(trackId, transform.getIdentifier());
    if (!sptr) {
        throw FailedToOpenOutputStream(trackId, transform.getIdentifier());
    }

    QTextStream &stream = *sptr;

    for (unsigned int i = 0; i < features.size(); ++i) {

        if (m_stdout || m_singleFileName != "") {
            if (trackId != m_prevPrintedTrackId) {
                stream << "\"" << trackId << "\"" << m_separator;
                m_prevPrintedTrackId = trackId;
            } else {
                stream << m_separator;
            }
        }

        QString timestamp = features[i].timestamp.toString().c_str();
        timestamp.replace(QRegExp("^ +"), "");
        stream << timestamp;

        if (features[i].hasDuration) {
            QString duration = features[i].duration.toString().c_str();
            duration.replace(QRegExp("^ +"), "");
            stream << m_separator << duration;
        }            

        if (summaryType != "") {
            stream << m_separator << summaryType.c_str();
        }

        for (unsigned int j = 0; j < features[i].values.size(); ++j) {
            stream << m_separator << features[i].values[j];
        }

        if (features[i].label != "") {
            stream << m_separator << "\"" << features[i].label.c_str() << "\"";
        }

        stream << "\n";
    }
}