view data/fileio/CSVFileReader.cpp @ 490:c3fb8258e34d

* Make it possible to import an entire session from an RDF document.
  However, at the moment the timings of events appear to be constrained
  by how far the audio decoder has got through its audio file at the
  time the event is queried -- need to investigate.

/* -*- 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 "CSVFileReader.h"

#include "model/Model.h"
#include "base/RealTime.h"
#include "model/SparseOneDimensionalModel.h"
#include "model/SparseTimeValueModel.h"
#include "model/EditableDenseThreeDimensionalModel.h"
#include "DataFileReaderFactory.h"

#include <QFile>
#include <QString>
#include <QRegExp>
#include <QStringList>
#include <QTextStream>

#include <iostream>

CSVFileReader::CSVFileReader(QString path, CSVFormat format,
                             size_t mainModelSampleRate) :
    m_format(format),
    m_file(0),
    m_mainModelSampleRate(mainModelSampleRate)
{
    m_file = new QFile(path);
    bool good = false;
    
    if (!m_file->exists()) {
	m_error = QFile::tr("File \"%1\" does not exist").arg(path);
    } else if (!m_file->open(QIODevice::ReadOnly | QIODevice::Text)) {
	m_error = QFile::tr("Failed to open file \"%1\"").arg(path);
    } else {
	good = true;
    }

    if (!good) {
	delete m_file;
	m_file = 0;
    }
}

CSVFileReader::~CSVFileReader()
{
    std::cerr << "CSVFileReader::~CSVFileReader: file is " << m_file << std::endl;

    if (m_file) {
        std::cerr << "CSVFileReader::CSVFileReader: Closing file" << std::endl;
        m_file->close();
    }
    delete m_file;
}

bool
CSVFileReader::isOK() const
{
    return (m_file != 0);
}

QString
CSVFileReader::getError() const
{
    return m_error;
}

Model *
CSVFileReader::load() const
{
    if (!m_file) return 0;
/*!!!
    CSVFormatDialog *dialog = new CSVFormatDialog
	(0, m_file, m_mainModelSampleRate);

    if (dialog->exec() == QDialog::Rejected) {
	delete dialog;
        throw DataFileReaderFactory::ImportCancelled;
    }
*/

    CSVFormat::ModelType   modelType = m_format.getModelType();
    CSVFormat::TimingType timingType = m_format.getTimingType();
    CSVFormat::TimeUnits   timeUnits = m_format.getTimeUnits();
    QString separator = m_format.getSeparator();
    QString::SplitBehavior behaviour = m_format.getSplitBehaviour();
    size_t sampleRate = m_format.getSampleRate();
    size_t windowSize = m_format.getWindowSize();

    if (timingType == CSVFormat::ExplicitTiming) {
	windowSize = 1;
	if (timeUnits == CSVFormat::TimeSeconds) {
	    sampleRate = m_mainModelSampleRate;
	}
    }

    SparseOneDimensionalModel *model1 = 0;
    SparseTimeValueModel *model2 = 0;
    EditableDenseThreeDimensionalModel *model3 = 0;
    Model *model = 0;

    QTextStream in(m_file);
    in.seek(0);

    unsigned int warnings = 0, warnLimit = 10;
    unsigned int lineno = 0;

    float min = 0.0, max = 0.0;

    size_t frameNo = 0;

    while (!in.atEnd()) {

        // QTextStream's readLine doesn't cope with old-style Mac
        // CR-only line endings.  Why did they bother making the class
        // cope with more than one sort of line ending, if it still
        // can't be configured to cope with all the common sorts?

        // For the time being we'll deal with this case (which is
        // relatively uncommon for us, but still necessary to handle)
        // by reading the entire file using a single readLine, and
        // splitting it.  For CR and CR/LF line endings this will just
        // read a line at a time, and that's obviously OK.

        QString chunk = in.readLine();
        QStringList lines = chunk.split('\r', QString::SkipEmptyParts);
        
        for (size_t li = 0; li < lines.size(); ++li) {

            QString line = lines[li];

            if (line.startsWith("#")) continue;

            QStringList list = line.split(separator, behaviour);

            if (!model) {

                switch (modelType) {

                case CSVFormat::OneDimensionalModel:
                    model1 = new SparseOneDimensionalModel(sampleRate, windowSize);
                    model = model1;
                    break;
		
                case CSVFormat::TwoDimensionalModel:
                    model2 = new SparseTimeValueModel(sampleRate, windowSize, false);
                    model = model2;
                    break;
		
                case CSVFormat::ThreeDimensionalModel:
                    model3 = new EditableDenseThreeDimensionalModel(sampleRate,
                                                                    windowSize,
                                                                    list.size());
                    model = model3;
                    break;
                }
            }

            QStringList tidyList;
            QRegExp nonNumericRx("[^0-9eE.,+-]");

            for (int i = 0; i < list.size(); ++i) {
	    
                QString s(list[i].trimmed());

                if (s.length() >= 2 && s.startsWith("\"") && s.endsWith("\"")) {
                    s = s.mid(1, s.length() - 2);
                } else if (s.length() >= 2 && s.startsWith("'") && s.endsWith("'")) {
                    s = s.mid(1, s.length() - 2);
                }

                if (i == 0 && timingType == CSVFormat::ExplicitTiming) {

                    bool ok = false;
                    QString numeric = s;
                    numeric.remove(nonNumericRx);

                    if (timeUnits == CSVFormat::TimeSeconds) {

                        double time = numeric.toDouble(&ok);
                        frameNo = int(time * sampleRate + 0.00001);

                    } else {

                        frameNo = numeric.toInt(&ok);

                        if (timeUnits == CSVFormat::TimeWindows) {
                            frameNo *= windowSize;
                        }
                    }
			       
                    if (!ok) {
                        if (warnings < warnLimit) {
                            std::cerr << "WARNING: CSVFileReader::load: "
                                      << "Bad time format (\"" << s.toStdString()
                                      << "\") in data line "
                                      << lineno << ":" << std::endl;
                            std::cerr << line.toStdString() << std::endl;
                        } else if (warnings == warnLimit) {
                            std::cerr << "WARNING: Too many warnings" << std::endl;
                        }
                        ++warnings;
                    }
                } else {
                    tidyList.push_back(s);
                }
            }

            if (modelType == CSVFormat::OneDimensionalModel) {
	    
                SparseOneDimensionalModel::Point point
                    (frameNo,
                     tidyList.size() > 0 ? tidyList[tidyList.size()-1] :
                     QString("%1").arg(lineno));

                model1->addPoint(point);

            } else if (modelType == CSVFormat::TwoDimensionalModel) {

                SparseTimeValueModel::Point point
                    (frameNo,
                     tidyList.size() > 0 ? tidyList[0].toFloat() : 0.0,
                     tidyList.size() > 1 ? tidyList[1] : QString("%1").arg(lineno));

                model2->addPoint(point);

            } else if (modelType == CSVFormat::ThreeDimensionalModel) {

                DenseThreeDimensionalModel::Column values;

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

                    bool ok = false;
                    float value = list[i].toFloat(&ok);
                    values.push_back(value);
	    
                    if ((lineno == 0 && i == 0) || value < min) min = value;
                    if ((lineno == 0 && i == 0) || value > max) max = value;

                    if (!ok) {
                        if (warnings < warnLimit) {
                            std::cerr << "WARNING: CSVFileReader::load: "
                                      << "Non-numeric value \""
                                      << list[i].toStdString()
                                      << "\" in data line " << lineno
                                      << ":" << std::endl;
                            std::cerr << line.toStdString() << std::endl;
                            ++warnings;
                        } else if (warnings == warnLimit) {
//                            std::cerr << "WARNING: Too many warnings" << std::endl;
                        }
                    }
                }
	
//                std::cerr << "Setting bin values for count " << lineno << ", frame "
//                          << frameNo << ", time " << RealTime::frame2RealTime(frameNo, sampleRate) << std::endl;

                model3->setColumn(frameNo / model3->getResolution(), values);
            }

            ++lineno;
            if (timingType == CSVFormat::ImplicitTiming ||
                list.size() == 0) {
                frameNo += windowSize;
            }
        }
    }

    if (modelType == CSVFormat::ThreeDimensionalModel) {
	model3->setMinimumLevel(min);
	model3->setMaximumLevel(max);
    }

    return model;
}