Mercurial > hg > svcore
view data/fileio/MatchFileReader.cpp @ 551:408e56d30f58
* Re-enable peak frequencies display in spectrogram
author | Chris Cannam |
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date | Thu, 05 Feb 2009 17:33:21 +0000 |
parents | c022976d18e8 |
children | 06f13a3b9e9e |
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/* -*- 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; }