view widgets/UnitConverter.cpp @ 1551:e79731086b0f

Fixes to NoteLayer, particularly to calculation of vertical scale when model unit is not Hz. To avoid inconsistency we now behave as if the unit is always Hz from the point of view of the external API and display, converting at the point where we obtain values from the events themselves. Also various fixes to editing.

/* -*- 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 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 "UnitConverter.h"

#include <QSpinBox>
#include <QComboBox>
#include <QDoubleSpinBox>
#include <QLabel>
#include <QDialogButtonBox>
#include <QGridLayout>
#include <QTabWidget>

#include "base/Debug.h"
#include "base/Pitch.h"
#include "base/Preferences.h"

using namespace std;

static QString pianoNotes[] = {
    "C", "C# / Db", "D", "D# / Eb", "E",
    "F", "F# / Gb", "G", "G# / Ab", "A", "A# / Bb", "B"
};

UnitConverter::UnitConverter(QWidget *parent) :
    QDialog(parent)
{
    QGridLayout *maingrid = new QGridLayout;
    setLayout(maingrid);
    
    QTabWidget *tabs = new QTabWidget;
    maingrid->addWidget(tabs, 0, 0);
    
    QDialogButtonBox *bb = new QDialogButtonBox(QDialogButtonBox::Close);
    maingrid->addWidget(bb, 1, 0);
    connect(bb, SIGNAL(rejected()), this, SLOT(close()));
    
    QFrame *frame = new QFrame;
    tabs->addTab(frame, tr("Pitch"));
    
    QGridLayout *grid = new QGridLayout;
    frame->setLayout(grid);

    m_freq = new QDoubleSpinBox;
    m_freq->setSuffix(QString(" Hz"));
    m_freq->setDecimals(6);
    m_freq->setMinimum(1e-3);
    m_freq->setMaximum(1e6);
    m_freq->setValue(440);
    connect(m_freq, SIGNAL(valueChanged(double)),
            this, SLOT(freqChanged()));

    // The min and max range values for all the remaining controls are
    // determined by the min and max Hz above
    
    m_midi = new QSpinBox;
    m_midi->setMinimum(-156);
    m_midi->setMaximum(203);
    connect(m_midi, SIGNAL(valueChanged(int)),
            this, SLOT(midiChanged()));

    m_note = new QComboBox;
    for (int i = 0; i < 12; ++i) {
        m_note->addItem(pianoNotes[i]);
    }
    connect(m_note, SIGNAL(currentIndexChanged(int)),
            this, SLOT(noteChanged()));

    m_octave = new QSpinBox;
    m_octave->setMinimum(-14);
    m_octave->setMaximum(15);
    connect(m_octave, SIGNAL(valueChanged(int)),
            this, SLOT(octaveChanged()));

    m_cents = new QDoubleSpinBox;
    m_cents->setSuffix(tr(" cents"));
    m_cents->setDecimals(4);
    m_cents->setMinimum(-50);
    m_cents->setMaximum(50);
    connect(m_cents, SIGNAL(valueChanged(double)),
            this, SLOT(centsChanged()));
    
    int row = 0;

    grid->addWidget(new QLabel(tr("In 12-tone Equal Temperament:")), row, 0, 1, 9);

    ++row;
    
    grid->setRowMinimumHeight(row, 8);

    ++row;
    
    grid->addWidget(m_freq, row, 0, 2, 1, Qt::AlignRight | Qt::AlignVCenter);
    grid->addWidget(new QLabel(tr("=")), row, 1, 2, 1, Qt::AlignHCenter | Qt::AlignVCenter);

    grid->addWidget(new QLabel(tr("+")), row, 7, 2, 1, Qt::AlignHCenter | Qt::AlignVCenter);
    grid->addWidget(m_cents, row, 8, 2, 1, Qt::AlignLeft | Qt::AlignVCenter);

    grid->addWidget(new QLabel(tr("Piano note")), row, 2, 1, 2);
    grid->addWidget(m_note, row, 4);
    grid->addWidget(new QLabel(tr("in octave")), row, 5);
    grid->addWidget(m_octave, row, 6);

    ++row;
    
    grid->addWidget(new QLabel(tr("MIDI pitch")), row, 2, 1, 2);
    grid->addWidget(m_midi, row, 4);
    
    ++row;

    grid->setRowStretch(row, 20);
    grid->setRowMinimumHeight(row, 8);

    ++row;

    m_pitchPrefsLabel = new QLabel;
    grid->addWidget(m_pitchPrefsLabel, row, 0, 1, 9);

    ++row;
    
    grid->addWidget
        (new QLabel(tr("Note that only pitches in the range 0 to 127 are valid "
                       "in the MIDI protocol.")),
         row, 0, 1, 9);

    ++row;
    
    frame = new QFrame;
    tabs->addTab(frame, tr("Tempo"));
    
    grid = new QGridLayout;
    frame->setLayout(grid);

    m_samples = new QDoubleSpinBox;
    m_samples->setSuffix(QString(" samples"));
    m_samples->setDecimals(2);
    m_samples->setMinimum(1);
    m_samples->setMaximum(1e8);
    m_samples->setValue(22050);
    connect(m_samples, SIGNAL(valueChanged(double)),
            this, SLOT(samplesChanged()));
    
    m_period = new QDoubleSpinBox;
    m_period->setSuffix(QString(" ms"));
    m_period->setDecimals(4);
    m_period->setMinimum(1e-3);
    m_period->setMaximum(100000);
    m_period->setValue(500);
    connect(m_period, SIGNAL(valueChanged(double)),
            this, SLOT(periodChanged()));

    m_bpm = new QDoubleSpinBox;
    m_bpm->setSuffix(QString(" bpm"));
    m_bpm->setDecimals(4);
    m_bpm->setMinimum(0.1);
    m_bpm->setMaximum(1e6);
    m_bpm->setValue(120);
    connect(m_bpm, SIGNAL(valueChanged(double)),
            this, SLOT(bpmChanged()));

    m_tempofreq = new QDoubleSpinBox;
    m_tempofreq->setSuffix(QString(" beats/sec"));
    m_tempofreq->setDecimals(4);
    m_tempofreq->setMinimum(1e-3);
    m_tempofreq->setMaximum(1e5);
    m_tempofreq->setValue(0.5);

    connect(m_tempofreq, SIGNAL(valueChanged(double)),
            this, SLOT(tempofreqChanged()));
        
    m_samplerate = new QComboBox;
    QList<int> rates;
    rates << 8000;
    for (int i = 1; i <= 16; i *= 2) {
        rates << 11025 * i << 12000 * i;
    }
    foreach (int r, rates) {
        m_samplerate->addItem(QString("%1 Hz").arg(r));
    }
    connect(m_samplerate, SIGNAL(currentIndexChanged(int)),
            this, SLOT(samplerateChanged()));
    m_samplerate->setCurrentText("44100 Hz");
    
    connect(Preferences::getInstance(),
            SIGNAL(propertyChanged(PropertyContainer::PropertyName)),
            this, SLOT(preferenceChanged(PropertyContainer::PropertyName)));

    row = 0;

    grid->setRowStretch(row, 20);
    grid->setRowMinimumHeight(row, 8);

    ++row;

    grid->addWidget(new QLabel(tr("Beat period")), row, 0, 2, 1, Qt::AlignVCenter);
    grid->addWidget(m_period, row, 1);
    grid->addWidget(new QLabel(tr("=")), row, 2, 2, 1, Qt::AlignVCenter);

    grid->addWidget(m_tempofreq, row, 3);

    grid->addWidget(new QLabel(tr("at")), row, 4, 2, 1, Qt::AlignVCenter);
    grid->addWidget(m_samplerate, row, 5, 2, 1, Qt::AlignVCenter);

    ++row;
    
    grid->addWidget(m_samples, row, 1);
    grid->addWidget(m_bpm, row, 3);

    ++row;
    
    grid->setRowStretch(row, 20);
    grid->setRowMinimumHeight(row, 8);
    
    updatePitchesFromFreq();
    updatePitchPrefsLabel();
    updateTempiFromSamples();
}

UnitConverter::~UnitConverter()
{
}

void
UnitConverter::setTo(QSpinBox *box, int value)
{
    box->blockSignals(true);
    if (value < box->minimum() || value > box->maximum()) {
        QPalette p;
        p.setColor(QPalette::Text, Qt::red);
        box->setPalette(p);
    } else {
        box->setPalette(QPalette());
    }
    box->setValue(value);
    box->blockSignals(false);
}

void
UnitConverter::setTo(QDoubleSpinBox *box, double value)
{
    box->blockSignals(true);
    if (value < box->minimum() || value > box->maximum()) {
        QPalette p;
        p.setColor(QPalette::Text, Qt::red);
        box->setPalette(p);
    } else {
        box->setPalette(QPalette());
    }
    box->setValue(value);
    box->blockSignals(false);
}

void
UnitConverter::preferenceChanged(PropertyContainer::PropertyName)
{
    updatePitchesFromFreq();
    updatePitchPrefsLabel();
}

void
UnitConverter::updatePitchPrefsLabel()
{
    m_pitchPrefsLabel->setText
        (tr("With concert-A tuning frequency at %1 Hz, and "
            "middle C residing in octave %2.\n"
            "(These can be changed in the application preferences.)")
         .arg(Preferences::getInstance()->getTuningFrequency())
         .arg(Preferences::getInstance()->getOctaveOfMiddleC()));
}

void
UnitConverter::freqChanged()
{
    updatePitchesFromFreq();
}

void
UnitConverter::midiChanged()
{
    double freq = Pitch::getFrequencyForPitch(m_midi->value(), m_cents->value());
    m_freq->setValue(freq);
}

void
UnitConverter::noteChanged()
{
    int pitch = Pitch::getPitchForNoteAndOctave(m_note->currentIndex(),
                                                m_octave->value());
    double freq = Pitch::getFrequencyForPitch(pitch, m_cents->value());
    m_freq->setValue(freq);
}

void
UnitConverter::octaveChanged()
{
    int pitch = Pitch::getPitchForNoteAndOctave(m_note->currentIndex(),
                                                m_octave->value());
    double freq = Pitch::getFrequencyForPitch(pitch, m_cents->value());
    m_freq->setValue(freq);
}

void
UnitConverter::centsChanged()
{
    double freq = Pitch::getFrequencyForPitch(m_midi->value(), m_cents->value());
    m_freq->setValue(freq);
}

void
UnitConverter::updatePitchesFromFreq()
{
    double cents = 0;
    int pitch = Pitch::getPitchForFrequency(m_freq->value(), &cents);
    int note, octave;
    Pitch::getNoteAndOctaveForPitch(pitch, note, octave);

//    cerr << "pitch " << pitch << " note " << note << " octave " << octave << " cents " << cents << endl;

    setTo(m_midi, pitch);
    setTo(m_cents, cents);
    setTo(m_octave, octave);

    m_note->blockSignals(true);
    m_note->setCurrentIndex(note);
    m_note->blockSignals(false);
}

void
UnitConverter::samplesChanged()
{
    updateTempiFromSamples();
}

void
UnitConverter::periodChanged()
{
    double rate = getSampleRate();
    double sec = m_period->value() / 1000.0;
    double samples = rate * sec;
    m_samples->setValue(samples);
}

void
UnitConverter::bpmChanged()
{
    double rate = getSampleRate();
    double sec = 60.0 / m_bpm->value();
    double samples = rate * sec;
    m_samples->setValue(samples);
}

void
UnitConverter::tempofreqChanged()
{
    double rate = getSampleRate();
    double samples = rate / m_tempofreq->value();
    m_samples->setValue(samples);
}

void
UnitConverter::samplerateChanged()
{
    // Preserve the beat period in seconds, here, not in samples
    periodChanged();
}

double
UnitConverter::getSampleRate()
{
    return double(atoi(m_samplerate->currentText().toLocal8Bit().data()));
}

void
UnitConverter::updateTempiFromSamples()
{
    double samples = m_samples->value();
    double rate = getSampleRate();

//    cerr << samples << " samples at rate " << rate << endl;

    double sec = samples / rate;
    double hz = rate / samples;
    double bpm = 60.0 / sec;

    setTo(m_bpm, bpm);
    setTo(m_period, sec * 1000.0);
    setTo(m_tempofreq, hz);
}