view data/fileio/MatchFileReader.cpp @ 631:3a5ee4b6c9ad

* Complete the overhaul of CSV file import; now you can pick the purpose for
  each column in the file, and SV should do the rest.  The most significant
  practical improvement here is that we can now handle files in which time
  and duration do not necessarily appear in known columns.

/* -*- 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) {
        std::cerr << "MatchFileReader::MatchFileReader: Closing file" << std::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) {
        std::cerr << "ERROR in Match file: this hop time == 0, using 0.01 instead" << std::endl;
        alignment.thisHopTime = 0.01;
    }

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

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

    return alignment;
}