view data/fileio/MatchFileReader.cpp @ 875:3e6ed8a8577b tonioni

Use a sparse time-value model only for outputs with fixed bin count of 1, not for those with unknown bin count.
(Precursor to using more than one model for outputs with unknown bin count)

/* -*- 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 2007 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 "MatchFileReader.h"

#include <QFile>
#include <QTextStream>

#include <cmath>
#include <iostream>

Alignment::Alignment() :
    thisHopTime(0.0),
    refHopTime(0.0)
{
}

double
Alignment::fromReference(double t) const
{
    int ri = lrint(t / refHopTime);
    int index = search(refIndex, ri);
    return thisIndex[index] * thisHopTime;
}

double
Alignment::toReference(double t) const
{
    int ti = lrint(t / thisHopTime);
    int index = search(thisIndex, ti);
    return refIndex[index] * refHopTime;
}

int
Alignment::search(const FrameArray &arr, int val) const
{
    int len = arr.size();
    int max = len - 1;
    int min = 0;
    while (max > min) {
        int mid = (max + min) / 2;
        if (val > arr[mid]) {
            min = mid + 1;
        } else {
            max = mid;
        }
    } // max = MIN_j (arr[j] >= val)   i.e. the first equal or next highest
    while ((max + 1 < len) && (arr[max + 1] == val)) {
        max++;
    }
    return (min + max) / 2;
}

MatchFileReader::MatchFileReader(QString path) :
    m_file(0)
{
    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;
    }
}

MatchFileReader::~MatchFileReader()
{
    if (m_file) {
        SVDEBUG << "MatchFileReader::MatchFileReader: Closing file" << endl;
        m_file->close();
    }
    delete m_file;
}

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

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

Alignment
MatchFileReader::load() const
{
    Alignment alignment;

    if (!m_file) return alignment;

    QTextStream in(m_file);

/*
File: /home/studio/match-test/mahler-3-boulez-5.wav
Marks: -1
FixedPoints: true 0
0
0
0
0
File: /home/studio/match-test/mahler-3-haitink-5.wav
Marks: 0
FixedPoints: true 0
0.02
0.02
12836
*/

    int fileCount = 0;
    int state = 0;
    int count = 0;

    while (!in.atEnd()) {

        QString line = in.readLine().trimmed();
        if (line.startsWith("File: ")) {
            ++fileCount;
            continue;
        }
        if (fileCount != 2) continue;
        if (line.startsWith("Marks:") || line.startsWith("FixedPoints:")) {
            continue;
        }

        switch (state) {
        case 0:
            alignment.thisHopTime = line.toDouble();
            break;
        case 1:
            alignment.refHopTime = line.toDouble();
            break;
        case 2: 
            count = line.toInt();
            break;
        case 3:
            alignment.thisIndex.push_back(line.toInt());
            break;
        case 4:
            alignment.refIndex.push_back(line.toInt());
            break;
        }

        if (state < 3) ++state;
        else if (state == 3 && alignment.thisIndex.size() == count) ++state;
    }

    if (alignment.thisHopTime == 0.0) {
        cerr << "ERROR in Match file: this hop time == 0, using 0.01 instead" << endl;
        alignment.thisHopTime = 0.01;
    }

    if (alignment.refHopTime == 0.0) {
        cerr << "ERROR in Match file: ref hop time == 0, using 0.01 instead" << endl;
        alignment.refHopTime = 0.01;
    }

    cerr << "MatchFileReader: this hop = " << alignment.thisHopTime << ", ref hop = " << alignment.refHopTime << ", this index count = " << alignment.thisIndex.size() << ", ref index count = " << alignment.refIndex.size() << endl;

    return alignment;
}