Chris@885: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
Chris@885: 
Chris@885: /*
Chris@885:     Sonic Visualiser
Chris@885:     An audio file viewer and annotation editor.
Chris@885:     Centre for Digital Music, Queen Mary, University of London.
Chris@885:     
Chris@885:     This program is free software; you can redistribute it and/or
Chris@885:     modify it under the terms of the GNU General Public License as
Chris@885:     published by the Free Software Foundation; either version 2 of the
Chris@885:     License, or (at your option) any later version.  See the file
Chris@885:     COPYING included with this distribution for more information.
Chris@885: */
Chris@885: 
Chris@885: #include "UnitConverter.h"
Chris@885: 
Chris@885: #include <QSpinBox>
Chris@885: #include <QComboBox>
Chris@885: #include <QDoubleSpinBox>
Chris@885: #include <QLabel>
Chris@885: #include <QDialogButtonBox>
Chris@885: #include <QGridLayout>
Chris@889: #include <QTabWidget>
Chris@885: 
Chris@885: #include "base/Debug.h"
Chris@885: #include "base/Pitch.h"
Chris@888: #include "base/Preferences.h"
Chris@885: 
Chris@885: using namespace std;
Chris@885: 
Chris@886: static QString pianoNotes[] = {
Chris@886:     "C", "C# / Db", "D", "D# / Eb", "E",
Chris@886:     "F", "F# / Gb", "G", "G# / Ab", "A", "A# / Bb", "B"
Chris@886: };
Chris@886: 
Chris@885: UnitConverter::UnitConverter(QWidget *parent) :
Chris@885:     QDialog(parent)
Chris@885: {
Chris@889:     QGridLayout *maingrid = new QGridLayout;
Chris@889:     setLayout(maingrid);
Chris@889:     
Chris@889:     QTabWidget *tabs = new QTabWidget;
Chris@889:     maingrid->addWidget(tabs, 0, 0);
Chris@889:     
Chris@889:     QDialogButtonBox *bb = new QDialogButtonBox(QDialogButtonBox::Close);
Chris@889:     maingrid->addWidget(bb, 1, 0);
Chris@889:     connect(bb, SIGNAL(rejected()), this, SLOT(close()));
Chris@889:     
Chris@889:     QFrame *frame = new QFrame;
Chris@889:     tabs->addTab(frame, tr("Pitch"));
Chris@889:     
Chris@885:     QGridLayout *grid = new QGridLayout;
Chris@889:     frame->setLayout(grid);
Chris@885: 
Chris@889:     m_freq = new QDoubleSpinBox;
Chris@889:     m_freq->setSuffix(QString(" Hz"));
Chris@889:     m_freq->setDecimals(6);
Chris@889:     m_freq->setMinimum(1e-3);
Chris@889:     m_freq->setMaximum(1e6);
Chris@889:     m_freq->setValue(440);
Chris@889:     connect(m_freq, SIGNAL(valueChanged(double)),
Chris@1266:             this, SLOT(freqChanged()));
Chris@885: 
Chris@888:     // The min and max range values for all the remaining controls are
Chris@888:     // determined by the min and max Hz above
Chris@888:     
Chris@885:     m_midi = new QSpinBox;
Chris@888:     m_midi->setMinimum(-156);
Chris@888:     m_midi->setMaximum(203);
Chris@885:     connect(m_midi, SIGNAL(valueChanged(int)),
Chris@1266:             this, SLOT(midiChanged()));
Chris@885: 
Chris@885:     m_note = new QComboBox;
Chris@886:     for (int i = 0; i < 12; ++i) {
Chris@1266:         m_note->addItem(pianoNotes[i]);
Chris@886:     }
Chris@886:     connect(m_note, SIGNAL(currentIndexChanged(int)),
Chris@1266:             this, SLOT(noteChanged()));
Chris@885: 
Chris@885:     m_octave = new QSpinBox;
Chris@888:     m_octave->setMinimum(-14);
Chris@888:     m_octave->setMaximum(15);
Chris@886:     connect(m_octave, SIGNAL(valueChanged(int)),
Chris@1266:             this, SLOT(octaveChanged()));
Chris@885: 
Chris@885:     m_cents = new QDoubleSpinBox;
Chris@885:     m_cents->setSuffix(tr(" cents"));
Chris@885:     m_cents->setDecimals(4);
Chris@885:     m_cents->setMinimum(-50);
Chris@885:     m_cents->setMaximum(50);
Chris@885:     connect(m_cents, SIGNAL(valueChanged(double)),
Chris@1266:             this, SLOT(centsChanged()));
Chris@885:     
Chris@893:     int row = 0;
Chris@893: 
Chris@893:     grid->addWidget(new QLabel(tr("In 12-tone Equal Temperament:")), row, 0, 1, 9);
Chris@893: 
Chris@893:     ++row;
Chris@893:     
Chris@893:     grid->setRowMinimumHeight(row, 8);
Chris@893: 
Chris@893:     ++row;
Chris@886:     
Chris@892:     grid->addWidget(m_freq, row, 0, 2, 1, Qt::AlignRight | Qt::AlignVCenter);
Chris@892:     grid->addWidget(new QLabel(tr("=")), row, 1, 2, 1, Qt::AlignHCenter | Qt::AlignVCenter);
Chris@885: 
Chris@892:     grid->addWidget(new QLabel(tr("+")), row, 7, 2, 1, Qt::AlignHCenter | Qt::AlignVCenter);
Chris@892:     grid->addWidget(m_cents, row, 8, 2, 1, Qt::AlignLeft | Qt::AlignVCenter);
Chris@885: 
Chris@886:     grid->addWidget(new QLabel(tr("Piano note")), row, 2, 1, 2);
Chris@886:     grid->addWidget(m_note, row, 4);
Chris@886:     grid->addWidget(new QLabel(tr("in octave")), row, 5);
Chris@886:     grid->addWidget(m_octave, row, 6);
Chris@886: 
Chris@886:     ++row;
Chris@886:     
Chris@888:     grid->addWidget(new QLabel(tr("MIDI pitch")), row, 2, 1, 2);
Chris@886:     grid->addWidget(m_midi, row, 4);
Chris@886:     
Chris@886:     ++row;
Chris@885: 
Chris@893:     grid->setRowStretch(row, 20);
Chris@893:     grid->setRowMinimumHeight(row, 8);
Chris@893: 
Chris@893:     ++row;
Chris@893: 
Chris@891:     m_pitchPrefsLabel = new QLabel;
Chris@891:     grid->addWidget(m_pitchPrefsLabel, row, 0, 1, 9);
Chris@888: 
Chris@888:     ++row;
Chris@888:     
Chris@888:     grid->addWidget
Chris@1266:         (new QLabel(tr("Note that only pitches in the range 0 to 127 are valid "
Chris@1266:                        "in the MIDI protocol.")),
Chris@1266:          row, 0, 1, 9);
Chris@888: 
Chris@888:     ++row;
Chris@891:     
Chris@891:     frame = new QFrame;
Chris@891:     tabs->addTab(frame, tr("Tempo"));
Chris@891:     
Chris@891:     grid = new QGridLayout;
Chris@891:     frame->setLayout(grid);
Chris@885: 
Chris@892:     m_samples = new QDoubleSpinBox;
Chris@892:     m_samples->setSuffix(QString(" samples"));
Chris@893:     m_samples->setDecimals(2);
Chris@893:     m_samples->setMinimum(1);
Chris@893:     m_samples->setMaximum(1e8);
Chris@892:     m_samples->setValue(22050);
Chris@892:     connect(m_samples, SIGNAL(valueChanged(double)),
Chris@1266:             this, SLOT(samplesChanged()));
Chris@892:     
Chris@892:     m_period = new QDoubleSpinBox;
Chris@892:     m_period->setSuffix(QString(" ms"));
Chris@892:     m_period->setDecimals(4);
Chris@893:     m_period->setMinimum(1e-3);
Chris@893:     m_period->setMaximum(100000);
Chris@892:     m_period->setValue(500);
Chris@892:     connect(m_period, SIGNAL(valueChanged(double)),
Chris@1266:             this, SLOT(periodChanged()));
Chris@892: 
Chris@892:     m_bpm = new QDoubleSpinBox;
Chris@892:     m_bpm->setSuffix(QString(" bpm"));
Chris@892:     m_bpm->setDecimals(4);
Chris@892:     m_bpm->setMinimum(0.1);
Chris@892:     m_bpm->setMaximum(1e6);
Chris@892:     m_bpm->setValue(120);
Chris@892:     connect(m_bpm, SIGNAL(valueChanged(double)),
Chris@1266:             this, SLOT(bpmChanged()));
Chris@892: 
Chris@892:     m_tempofreq = new QDoubleSpinBox;
Chris@892:     m_tempofreq->setSuffix(QString(" beats/sec"));
Chris@892:     m_tempofreq->setDecimals(4);
Chris@893:     m_tempofreq->setMinimum(1e-3);
Chris@893:     m_tempofreq->setMaximum(1e5);
Chris@892:     m_tempofreq->setValue(0.5);
Chris@893: 
Chris@892:     connect(m_tempofreq, SIGNAL(valueChanged(double)),
Chris@1266:             this, SLOT(tempofreqChanged()));
Chris@1266:         
Chris@892:     m_samplerate = new QComboBox;
Chris@892:     QList<int> rates;
Chris@892:     rates << 8000;
Chris@892:     for (int i = 1; i <= 16; i *= 2) {
Chris@1266:         rates << 11025 * i << 12000 * i;
Chris@892:     }
Chris@892:     foreach (int r, rates) {
Chris@1266:         m_samplerate->addItem(QString("%1 Hz").arg(r));
Chris@892:     }
Chris@893:     connect(m_samplerate, SIGNAL(currentIndexChanged(int)),
Chris@1266:             this, SLOT(samplerateChanged()));
Chris@892:     m_samplerate->setCurrentText("44100 Hz");
Chris@892:     
Chris@891:     connect(Preferences::getInstance(),
Chris@1266:             SIGNAL(propertyChanged(PropertyContainer::PropertyName)),
Chris@1266:             this, SLOT(preferenceChanged(PropertyContainer::PropertyName)));
Chris@892: 
Chris@893:     row = 0;
Chris@892: 
Chris@893:     grid->setRowStretch(row, 20);
Chris@893:     grid->setRowMinimumHeight(row, 8);
Chris@893: 
Chris@893:     ++row;
Chris@893: 
Chris@893:     grid->addWidget(new QLabel(tr("Beat period")), row, 0, 2, 1, Qt::AlignVCenter);
Chris@893:     grid->addWidget(m_period, row, 1);
Chris@893:     grid->addWidget(new QLabel(tr("=")), row, 2, 2, 1, Qt::AlignVCenter);
Chris@893: 
Chris@893:     grid->addWidget(m_tempofreq, row, 3);
Chris@893: 
Chris@893:     grid->addWidget(new QLabel(tr("at")), row, 4, 2, 1, Qt::AlignVCenter);
Chris@893:     grid->addWidget(m_samplerate, row, 5, 2, 1, Qt::AlignVCenter);
Chris@893: 
Chris@893:     ++row;
Chris@893:     
Chris@892:     grid->addWidget(m_samples, row, 1);
Chris@892:     grid->addWidget(m_bpm, row, 3);
Chris@892: 
Chris@892:     ++row;
Chris@891:     
Chris@893:     grid->setRowStretch(row, 20);
Chris@893:     grid->setRowMinimumHeight(row, 8);
Chris@892:     
Chris@889:     updatePitchesFromFreq();
Chris@891:     updatePitchPrefsLabel();
Chris@891:     updateTempiFromSamples();
Chris@885: }
Chris@885: 
Chris@885: UnitConverter::~UnitConverter()
Chris@885: {
Chris@885: }
Chris@885: 
Chris@885: void
Chris@893: UnitConverter::setTo(QSpinBox *box, int value)
Chris@893: {
Chris@893:     box->blockSignals(true);
Chris@893:     if (value < box->minimum() || value > box->maximum()) {
Chris@1266:         QPalette p;
Chris@1266:         p.setColor(QPalette::Text, Qt::red);
Chris@1266:         box->setPalette(p);
Chris@893:     } else {
Chris@1266:         box->setPalette(QPalette());
Chris@893:     }
Chris@893:     box->setValue(value);
Chris@893:     box->blockSignals(false);
Chris@893: }
Chris@893: 
Chris@893: void
Chris@893: UnitConverter::setTo(QDoubleSpinBox *box, double value)
Chris@893: {
Chris@893:     box->blockSignals(true);
Chris@893:     if (value < box->minimum() || value > box->maximum()) {
Chris@1266:         QPalette p;
Chris@1266:         p.setColor(QPalette::Text, Qt::red);
Chris@1266:         box->setPalette(p);
Chris@893:     } else {
Chris@1266:         box->setPalette(QPalette());
Chris@893:     }
Chris@893:     box->setValue(value);
Chris@893:     box->blockSignals(false);
Chris@893: }
Chris@893: 
Chris@893: void
Chris@891: UnitConverter::preferenceChanged(PropertyContainer::PropertyName)
Chris@891: {
Chris@891:     updatePitchesFromFreq();
Chris@891:     updatePitchPrefsLabel();
Chris@891: }
Chris@891: 
Chris@891: void
Chris@891: UnitConverter::updatePitchPrefsLabel()
Chris@891: {
Chris@891:     m_pitchPrefsLabel->setText
Chris@1266:         (tr("With concert-A tuning frequency at %1 Hz, and "
Chris@1266:             "middle C residing in octave %2.\n"
Chris@1266:             "(These can be changed in the application preferences.)")
Chris@1266:          .arg(Preferences::getInstance()->getTuningFrequency())
Chris@1266:          .arg(Preferences::getInstance()->getOctaveOfMiddleC()));
Chris@891: }
Chris@891: 
Chris@891: void
Chris@893: UnitConverter::freqChanged()
Chris@885: {
Chris@889:     updatePitchesFromFreq();
Chris@885: }
Chris@885: 
Chris@885: void
Chris@893: UnitConverter::midiChanged()
Chris@885: {
Chris@889:     double freq = Pitch::getFrequencyForPitch(m_midi->value(), m_cents->value());
Chris@889:     m_freq->setValue(freq);
Chris@885: }
Chris@885: 
Chris@885: void
Chris@893: UnitConverter::noteChanged()
Chris@885: {
Chris@887:     int pitch = Pitch::getPitchForNoteAndOctave(m_note->currentIndex(),
Chris@1266:                                                 m_octave->value());
Chris@889:     double freq = Pitch::getFrequencyForPitch(pitch, m_cents->value());
Chris@889:     m_freq->setValue(freq);
Chris@885: }
Chris@885: 
Chris@885: void
Chris@893: UnitConverter::octaveChanged()
Chris@885: {
Chris@888:     int pitch = Pitch::getPitchForNoteAndOctave(m_note->currentIndex(),
Chris@1266:                                                 m_octave->value());
Chris@889:     double freq = Pitch::getFrequencyForPitch(pitch, m_cents->value());
Chris@889:     m_freq->setValue(freq);
Chris@885: }
Chris@885: 
Chris@885: void
Chris@893: UnitConverter::centsChanged()
Chris@885: {
Chris@889:     double freq = Pitch::getFrequencyForPitch(m_midi->value(), m_cents->value());
Chris@889:     m_freq->setValue(freq);
Chris@885: }
Chris@885: 
Chris@885: void
Chris@889: UnitConverter::updatePitchesFromFreq()
Chris@885: {
Chris@892:     double cents = 0;
Chris@889:     int pitch = Pitch::getPitchForFrequency(m_freq->value(), &cents);
Chris@887:     int note, octave;
Chris@887:     Pitch::getNoteAndOctaveForPitch(pitch, note, octave);
Chris@885: 
Chris@1158: //    cerr << "pitch " << pitch << " note " << note << " octave " << octave << " cents " << cents << endl;
Chris@893: 
Chris@893:     setTo(m_midi, pitch);
Chris@893:     setTo(m_cents, cents);
Chris@893:     setTo(m_octave, octave);
Chris@893: 
Chris@887:     m_note->blockSignals(true);
Chris@887:     m_note->setCurrentIndex(note);
Chris@887:     m_note->blockSignals(false);
Chris@885: }
Chris@885: 
Chris@891: void
Chris@893: UnitConverter::samplesChanged()
Chris@892: {
Chris@892:     updateTempiFromSamples();
Chris@892: }
Chris@892: 
Chris@892: void
Chris@893: UnitConverter::periodChanged()
Chris@892: {
Chris@892:     double rate = getSampleRate();
Chris@892:     double sec = m_period->value() / 1000.0;
Chris@892:     double samples = rate * sec;
Chris@892:     m_samples->setValue(samples);
Chris@892: }
Chris@892: 
Chris@892: void
Chris@893: UnitConverter::bpmChanged()
Chris@892: {
Chris@892:     double rate = getSampleRate();
Chris@892:     double sec = 60.0 / m_bpm->value();
Chris@892:     double samples = rate * sec;
Chris@892:     m_samples->setValue(samples);
Chris@892: }
Chris@892: 
Chris@892: void
Chris@893: UnitConverter::tempofreqChanged()
Chris@892: {
Chris@892:     double rate = getSampleRate();
Chris@892:     double samples = rate / m_tempofreq->value();
Chris@892:     m_samples->setValue(samples);
Chris@892: }
Chris@892: 
Chris@892: void
Chris@893: UnitConverter::samplerateChanged()
Chris@892: {
Chris@893:     // Preserve the beat period in seconds, here, not in samples
Chris@893:     periodChanged();
Chris@892: }
Chris@892: 
Chris@892: double
Chris@892: UnitConverter::getSampleRate()
Chris@892: {
Chris@892:     return double(atoi(m_samplerate->currentText().toLocal8Bit().data()));
Chris@892: }
Chris@892: 
Chris@892: void
Chris@891: UnitConverter::updateTempiFromSamples()
Chris@891: {
Chris@892:     double samples = m_samples->value();
Chris@892:     double rate = getSampleRate();
Chris@892: 
Chris@1158: //    cerr << samples << " samples at rate " << rate << endl;
Chris@892: 
Chris@892:     double sec = samples / rate;
Chris@892:     double hz = rate / samples;
Chris@892:     double bpm = 60.0 / sec;
Chris@892: 
Chris@893:     setTo(m_bpm, bpm);
Chris@893:     setTo(m_period, sec * 1000.0);
Chris@893:     setTo(m_tempofreq, hz);
Chris@891: }
Chris@885: 
Chris@885: