view data/model/test/TestZoomConstraints.h @ 1881:b504df98c3be

Ensure completion on output model is started at zero, so if it's checked before the input model has become ready and the transform has begun, it is not accidentally reported as complete (affected re-aligning models in Sonic Lineup when replacing the session)

/* -*- 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.
*/

#ifndef TEST_ZOOM_CONSTRAINTS_H
#define TEST_ZOOM_CONSTRAINTS_H

#include "../PowerOfTwoZoomConstraint.h"
#include "../PowerOfSqrtTwoZoomConstraint.h"
#include "../RelativelyFineZoomConstraint.h"

#include <QObject>
#include <QtTest>
#include <QDir>

#include <iostream>

using namespace std;

class TestZoomConstraints : public QObject
{
    Q_OBJECT

    string roundingName(ZoomConstraint::RoundingDirection dir) {
        switch (dir) {
        case ZoomConstraint::RoundDown: return "RoundDown";
        case ZoomConstraint::RoundUp: return "RoundUp";
        case ZoomConstraint::RoundNearest: return "RoundNearest";
        }
        return "<?>";
    }
    
    void compare(ZoomLevel zin,
                 ZoomConstraint::RoundingDirection dir,
                 ZoomLevel zobt,
                 ZoomLevel zexp) {
        if (zexp.level == 1) {
            // A zoom level of "1 pixel per frame" is not considered
            // canonical - it should be "1 frame per pixel"
            zexp.zone = ZoomLevel::FramesPerPixel;
        }
        if (zobt == zexp) {
            return;
        } else {
            std::cerr << "For input " << zin << " and rounding direction "
                      << roundingName(dir)
                      << ", expected output " << zexp << " but obtained "
                      << zobt << std::endl;
            QCOMPARE(zobt, zexp);
        }
    }

    void checkFpp(const ZoomConstraint &c,
                  ZoomConstraint::RoundingDirection dir,
                  int n,
                  int expected) {
        ZoomLevel zin(ZoomLevel::FramesPerPixel, n);
        ZoomLevel zexp(ZoomLevel::FramesPerPixel, expected);
        ZoomLevel zobt(c.getNearestZoomLevel(zin, dir));
        compare(zin, dir, zobt, zexp);
    }

    void checkPpf(const ZoomConstraint &c,
                  ZoomConstraint::RoundingDirection dir,
                  int n,
                  int expected) {
        ZoomLevel zin(ZoomLevel::PixelsPerFrame, n);
        ZoomLevel zexp(ZoomLevel::PixelsPerFrame, expected);
        ZoomLevel zobt(c.getNearestZoomLevel(zin, dir));
        compare(zin, dir, zobt, zexp);
    }

    void checkBoth(const ZoomConstraint &c,
                   ZoomConstraint::RoundingDirection dir,
                   int n,
                   int expected) {
        checkFpp(c, dir, n, expected);
        checkPpf(c, dir, n, expected);
    }

    void checkMaxMin(const ZoomConstraint &c,
                     ZoomConstraint::RoundingDirection dir) {
        auto max = c.getMaxZoomLevel();
        compare(max, dir,
                c.getNearestZoomLevel(max, dir), max);
        compare(max.incremented(), dir,
                c.getNearestZoomLevel(max.incremented(), dir), max);
        auto min = c.getMinZoomLevel();
        compare(min, dir,
                c.getNearestZoomLevel(min, dir), min);
        compare(min.decremented(), dir,
                c.getNearestZoomLevel(min.decremented(), dir), min);
    }

    const static ZoomConstraint::RoundingDirection up = ZoomConstraint::RoundUp;
    const static ZoomConstraint::RoundingDirection down = ZoomConstraint::RoundDown;
    const static ZoomConstraint::RoundingDirection nearest = ZoomConstraint::RoundNearest;
                                                                         
private slots:
    void unconstrainedNearest() {
        ZoomConstraint c;
        checkBoth(c, nearest, 1, 1);
        checkBoth(c, nearest, 2, 2);
        checkBoth(c, nearest, 3, 3);
        checkBoth(c, nearest, 4, 4);
        checkBoth(c, nearest, 20, 20);
        checkBoth(c, nearest, 32, 32);
        auto max = c.getMaxZoomLevel();
        QCOMPARE(c.getNearestZoomLevel(max), max);
        QCOMPARE(c.getNearestZoomLevel(max.incremented()), max);
    }
    
    void unconstrainedUp() {
        ZoomConstraint c;
        checkBoth(c, up, 1, 1);
        checkBoth(c, up, 2, 2);
        checkBoth(c, up, 3, 3);
        checkBoth(c, up, 4, 4);
        checkBoth(c, up, 20, 20);
        checkBoth(c, up, 32, 32);
        auto max = c.getMaxZoomLevel();
        QCOMPARE(c.getNearestZoomLevel(max, up), max);
        QCOMPARE(c.getNearestZoomLevel(max.incremented(), up), max);
    }
    
    void unconstrainedDown() {
        ZoomConstraint c;
        checkBoth(c, down, 1, 1);
        checkBoth(c, down, 2, 2);
        checkBoth(c, down, 3, 3);
        checkBoth(c, down, 4, 4);
        checkBoth(c, down, 20, 20);
        checkBoth(c, down, 32, 32);
        auto max = c.getMaxZoomLevel();
        QCOMPARE(c.getNearestZoomLevel(max, down), max);
        QCOMPARE(c.getNearestZoomLevel(max.incremented(), down), max);
    }

    void powerOfTwoNearest() {
        PowerOfTwoZoomConstraint c;
        checkBoth(c, nearest, 1, 1);
        checkBoth(c, nearest, 2, 2);
        checkBoth(c, nearest, 3, 2);
        checkBoth(c, nearest, 4, 4);
        checkBoth(c, nearest, 20, 16);
        checkBoth(c, nearest, 23, 16);
        checkBoth(c, nearest, 24, 16);
        checkBoth(c, nearest, 25, 32);
        auto max = c.getMaxZoomLevel();
        QCOMPARE(c.getNearestZoomLevel(max), max);
        QCOMPARE(c.getNearestZoomLevel(max.incremented()), max);
    }
    
    void powerOfTwoUp() {
        PowerOfTwoZoomConstraint c;
        checkBoth(c, up, 1, 1);
        checkBoth(c, up, 2, 2);
        checkFpp(c, up, 3, 4);
        checkPpf(c, up, 3, 2);
        checkBoth(c, up, 4, 4);
        checkFpp(c, up, 20, 32);
        checkPpf(c, up, 20, 16);
        checkBoth(c, up, 32, 32);
        checkFpp(c, up, 33, 64);
        checkPpf(c, up, 33, 32);
        checkMaxMin(c, up);
    }
    
    void powerOfTwoDown() {
        PowerOfTwoZoomConstraint c;
        checkBoth(c, down, 1, 1);
        checkBoth(c, down, 2, 2);
        checkFpp(c, down, 3, 2);
        checkPpf(c, down, 3, 4);
        checkBoth(c, down, 4, 4);
        checkFpp(c, down, 20, 16);
        checkPpf(c, down, 20, 32);
        checkBoth(c, down, 32, 32);
        checkFpp(c, down, 33, 32);
        checkPpf(c, down, 33, 64);
        checkMaxMin(c, down);
    }

    void powerOfSqrtTwoNearest() {
        PowerOfSqrtTwoZoomConstraint c;
        checkBoth(c, nearest, 1, 1);
        checkBoth(c, nearest, 2, 2);
        checkBoth(c, nearest, 3, 2);
        checkBoth(c, nearest, 4, 4);
        checkBoth(c, nearest, 18, 16);
        checkBoth(c, nearest, 19, 16);
        checkBoth(c, nearest, 20, 22);
        checkBoth(c, nearest, 23, 22);
        checkBoth(c, nearest, 28, 32);
        // PowerOfSqrtTwoZoomConstraint makes an effort to ensure
        // bigger numbers get rounded to a multiple of something
        // simple (64 or 90 depending on whether they are power-of-two
        // or power-of-sqrt-two types)
        checkBoth(c, nearest, 350, 360);
        // The most extreme level available in ppf mode
        // (getMinZoomLevel()) is currently 512, so these bigger
        // numbers will only happen in fpp mode
        checkFpp(c, nearest, 800, 720);
        checkFpp(c, nearest, 1023, 1024);
        checkFpp(c, nearest, 1024, 1024);
        checkFpp(c, nearest, 1024, 1024);
        checkFpp(c, nearest, 1025, 1024);
        checkPpf(c, nearest, 800, 512);
        checkPpf(c, nearest, 1025, 512);
        checkMaxMin(c, nearest);
    }
    
    void powerOfSqrtTwoUp() {
        PowerOfSqrtTwoZoomConstraint c;
        checkBoth(c, up, 1, 1);
        checkBoth(c, up, 2, 2);
        checkFpp(c, up, 3, 4);
        checkPpf(c, up, 3, 2);
        checkBoth(c, up, 4, 4);
        checkFpp(c, up, 18, 22);
        checkPpf(c, up, 18, 16);
        checkBoth(c, up, 22, 22);
        checkFpp(c, up, 23, 32);
        checkPpf(c, up, 23, 22);
        // see comments above
        checkFpp(c, up, 800, 1024);
        checkFpp(c, up, 1023, 1024);
        checkFpp(c, up, 1024, 1024);
        checkFpp(c, up, 1025, 1440);
        checkPpf(c, up, 300, 256);
        checkPpf(c, up, 800, 512);
        checkPpf(c, up, 1600, 512);
        checkMaxMin(c, up);
    }
    
    void powerOfSqrtTwoDown() {
        PowerOfSqrtTwoZoomConstraint c;
        checkBoth(c, down, 1, 1);
        checkBoth(c, down, 2, 2);
        checkFpp(c, down, 3, 2);
        checkPpf(c, down, 3, 4);
        checkBoth(c, down, 4, 4);
        checkFpp(c, down, 18, 16);
        checkPpf(c, down, 18, 22);
        checkBoth(c, down, 22, 22);
        checkFpp(c, down, 23, 22);
        checkPpf(c, down, 23, 32);
        // see comments above
        checkFpp(c, down, 800, 720);
        checkFpp(c, down, 1023, 720);
        checkFpp(c, down, 1024, 1024);
        checkFpp(c, down, 1025, 1024);
        checkPpf(c, down, 300, 360);
        checkPpf(c, down, 800, 512);
        checkPpf(c, down, 1600, 512);
        checkMaxMin(c, down);
    }

    void relativelyFineNearest() {
        RelativelyFineZoomConstraint c;
        checkBoth(c, nearest, 1, 1);
        checkBoth(c, nearest, 2, 2);
        checkBoth(c, nearest, 3, 3);
        checkBoth(c, nearest, 4, 4);
        checkBoth(c, nearest, 20, 20);
        checkBoth(c, nearest, 33, 32);
        checkBoth(c, nearest, 59, 56);
        checkBoth(c, nearest, 69, 72);
        checkBoth(c, nearest, 121, 128);
        checkMaxMin(c, nearest);
    }
    
    void relativelyFineUp() {
        RelativelyFineZoomConstraint c;
        checkBoth(c, up, 1, 1);
        checkBoth(c, up, 2, 2);
        checkBoth(c, up, 3, 3);
        checkBoth(c, up, 4, 4);
        checkBoth(c, up, 20, 20);
        checkFpp(c, up, 33, 36);
        checkPpf(c, up, 33, 32);
        checkFpp(c, up, 59, 64);
        checkPpf(c, up, 59, 56);
        checkFpp(c, up, 69, 72);
        checkPpf(c, up, 69, 64);
        checkFpp(c, up, 121, 128);
        checkPpf(c, up, 121, 112);
        checkMaxMin(c, up);
    }
    
    void relativelyFineDown() {
        RelativelyFineZoomConstraint c;
        checkBoth(c, down, 1, 1);
        checkBoth(c, down, 2, 2);
        checkBoth(c, down, 3, 3);
        checkBoth(c, down, 4, 4);
        checkBoth(c, down, 20, 20);
        checkFpp(c, down, 33, 32);
        checkPpf(c, down, 33, 36);
        checkFpp(c, down, 59, 56);
        checkPpf(c, down, 59, 64);
        checkFpp(c, down, 69, 64);
        checkPpf(c, down, 69, 72);
        checkFpp(c, down, 121, 112);
        checkPpf(c, down, 121, 128);
        checkMaxMin(c, down);
    }
};

#endif