Carla/source/modules/juce_audio_basics/mpe/juce_MPEZone.cpp

/*
  ==============================================================================

   This file is part of the JUCE library.
   Copyright (c) 2016 - ROLI Ltd.

   Permission is granted to use this software under the terms of the ISC license
   http://www.isc.org/downloads/software-support-policy/isc-license/

   Permission to use, copy, modify, and/or distribute this software for any
   purpose with or without fee is hereby granted, provided that the above
   copyright notice and this permission notice appear in all copies.

   THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH REGARD
   TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
   FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT,
   OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
   USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
   TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
   OF THIS SOFTWARE.

   -----------------------------------------------------------------------------

   To release a closed-source product which uses other parts of JUCE not
   licensed under the ISC terms, commercial licenses are available: visit
   www.juce.com for more information.

  ==============================================================================
*/

namespace
{
    void checkAndLimitZoneParameters (int minValue,
                                      int maxValue,
                                      int& valueToCheckAndLimit) noexcept
    {
        if (valueToCheckAndLimit < minValue || valueToCheckAndLimit > maxValue)
        {
            // if you hit this, one of the parameters you supplied for MPEZone
            // was not within the allowed range!
            // we fit this back into the allowed range here to maintain a valid
            // state for the zone, but probably the resulting zone is not what you
            //wanted it to be!
            jassertfalse;

            valueToCheckAndLimit = jlimit (minValue, maxValue, valueToCheckAndLimit);
        }
    }
}

//==============================================================================
MPEZone::MPEZone (int masterChannel_,
                  int numNoteChannels_,
                  int perNotePitchbendRange_,
                  int masterPitchbendRange_) noexcept
    : masterChannel (masterChannel_),
      numNoteChannels (numNoteChannels_),
      perNotePitchbendRange (perNotePitchbendRange_),
      masterPitchbendRange (masterPitchbendRange_)
{
    checkAndLimitZoneParameters (1, 15,                  masterChannel);
    checkAndLimitZoneParameters (1, 16 - masterChannel,  numNoteChannels);
    checkAndLimitZoneParameters (0, 96,                  perNotePitchbendRange);
    checkAndLimitZoneParameters (0, 96,                  masterPitchbendRange);
}

//==============================================================================
int MPEZone::getMasterChannel() const noexcept
{
    return masterChannel;
}

int MPEZone::getNumNoteChannels() const noexcept
{
    return numNoteChannels;
}

int MPEZone::getFirstNoteChannel() const noexcept
{
    return masterChannel + 1;
}

int MPEZone::getLastNoteChannel() const noexcept
{
    return masterChannel + numNoteChannels;
}

Range<int> MPEZone::getNoteChannelRange() const noexcept
{
    return Range<int>::withStartAndLength (getFirstNoteChannel(), getNumNoteChannels());
}

bool MPEZone::isUsingChannel (int channel) const noexcept
{
    jassert (channel > 0 && channel <= 16);
    return channel >= masterChannel && channel <= masterChannel + numNoteChannels;
}

bool MPEZone::isUsingChannelAsNoteChannel (int channel) const noexcept
{
    jassert (channel > 0 && channel <= 16);
    return channel > masterChannel && channel <= masterChannel + numNoteChannels;
}

int MPEZone::getPerNotePitchbendRange() const noexcept
{
    return perNotePitchbendRange;
}

int MPEZone::getMasterPitchbendRange() const noexcept
{
    return masterPitchbendRange;
}

void MPEZone::setPerNotePitchbendRange (int rangeInSemitones) noexcept
{
    checkAndLimitZoneParameters (0, 96, rangeInSemitones);
    perNotePitchbendRange = rangeInSemitones;
}

void MPEZone::setMasterPitchbendRange (int rangeInSemitones) noexcept
{
    checkAndLimitZoneParameters (0, 96, rangeInSemitones);
    masterPitchbendRange = rangeInSemitones;
}

//==============================================================================
bool MPEZone::overlapsWith (MPEZone other) const noexcept
{
    if (masterChannel == other.masterChannel)
        return true;

    if (masterChannel > other.masterChannel)
        return other.overlapsWith (*this);

    return masterChannel + numNoteChannels >= other.masterChannel;
}

//==============================================================================
bool MPEZone::truncateToFit (MPEZone other) noexcept
{
    const int masterChannelDiff = other.masterChannel - masterChannel;

    // we need at least 2 channels to be left after truncation:
    // 1 master channel and 1 note channel. otherwise we can't truncate.
    if (masterChannelDiff < 2)
        return false;

    numNoteChannels = jmin (numNoteChannels, masterChannelDiff - 1);
    return true;
}

//==============================================================================
bool MPEZone::operator== (const MPEZone& other) const noexcept
{
    return masterChannel         == other.masterChannel
        && numNoteChannels       == other.numNoteChannels
        && perNotePitchbendRange == other.perNotePitchbendRange
        && masterPitchbendRange  == other.masterPitchbendRange;
}

bool MPEZone::operator!= (const MPEZone& other) const noexcept
{
    return ! operator== (other);
}

//==============================================================================
//==============================================================================
#if JUCE_UNIT_TESTS

class MPEZoneTests   : public UnitTest
{
public:
    MPEZoneTests()  : UnitTest ("MPEZone class") {}

    void runTest() override
    {
        beginTest ("initialisation");
        {
            {
                MPEZone zone (1, 10);

                expectEquals (zone.getMasterChannel(), 1);
                expectEquals (zone.getNumNoteChannels(), 10);
                expectEquals (zone.getFirstNoteChannel(), 2);
                expectEquals (zone.getLastNoteChannel(), 11);
                expectEquals (zone.getPerNotePitchbendRange(), 48);
                expectEquals (zone.getMasterPitchbendRange(), 2);

                expect (zone.isUsingChannel (1));
                expect (zone.isUsingChannel (2));
                expect (zone.isUsingChannel (10));
                expect (zone.isUsingChannel (11));
                expect (! zone.isUsingChannel (12));
                expect (! zone.isUsingChannel (16));

                expect (! zone.isUsingChannelAsNoteChannel (1));
                expect (zone.isUsingChannelAsNoteChannel (2));
                expect (zone.isUsingChannelAsNoteChannel (10));
                expect (zone.isUsingChannelAsNoteChannel (11));
                expect (! zone.isUsingChannelAsNoteChannel (12));
                expect (! zone.isUsingChannelAsNoteChannel (16));
            }
            {
                MPEZone zone (5, 4);

                expectEquals (zone.getMasterChannel(), 5);
                expectEquals (zone.getNumNoteChannels(), 4);
                expectEquals (zone.getFirstNoteChannel(), 6);
                expectEquals (zone.getLastNoteChannel(), 9);
                expectEquals (zone.getPerNotePitchbendRange(), 48);
                expectEquals (zone.getMasterPitchbendRange(), 2);

                expect (! zone.isUsingChannel (1));
                expect (! zone.isUsingChannel (4));
                expect (zone.isUsingChannel (5));
                expect (zone.isUsingChannel (6));
                expect (zone.isUsingChannel (8));
                expect (zone.isUsingChannel (9));
                expect (! zone.isUsingChannel (10));
                expect (! zone.isUsingChannel (16));

                expect (! zone.isUsingChannelAsNoteChannel (5));
                expect (zone.isUsingChannelAsNoteChannel (6));
                expect (zone.isUsingChannelAsNoteChannel (8));
                expect (zone.isUsingChannelAsNoteChannel (9));
                expect (! zone.isUsingChannelAsNoteChannel (10));
            }

        }

        beginTest ("getNoteChannelRange");
        {
            MPEZone zone (2, 10);

            Range<int> noteChannelRange = zone.getNoteChannelRange();
            expectEquals (noteChannelRange.getStart(), 3);
            expectEquals (noteChannelRange.getEnd(), 13);
        }

        beginTest ("setting master pitchbend range");
        {
            MPEZone zone (1, 10);

            zone.setMasterPitchbendRange (96);
            expectEquals (zone.getMasterPitchbendRange(), 96);
            zone.setMasterPitchbendRange (0);
            expectEquals (zone.getMasterPitchbendRange(), 0);

            expectEquals (zone.getPerNotePitchbendRange(), 48);
        }

        beginTest ("setting per-note pitchbend range");
        {
            MPEZone zone (1, 10);

            zone.setPerNotePitchbendRange (96);
            expectEquals (zone.getPerNotePitchbendRange(), 96);
            zone.setPerNotePitchbendRange (0);
            expectEquals (zone.getPerNotePitchbendRange(), 0);

            expectEquals (zone.getMasterPitchbendRange(), 2);
        }

        beginTest ("checking overlap");
        {
            testOverlapsWith (1, 10, 1, 10, true);
            testOverlapsWith (1, 4,  6, 3,  false);
            testOverlapsWith (1, 4,  8, 3,  false);
            testOverlapsWith (2, 10, 2, 8,  true);
            testOverlapsWith (1, 10, 3, 2,  true);
            testOverlapsWith (3, 10, 5, 9,  true);
        }

        beginTest ("truncating");
        {
            testTruncateToFit (1, 10, 3, 10, true,  1, 1);
            testTruncateToFit (3, 10, 1, 10, false, 3, 10);
            testTruncateToFit (1, 10, 5, 8,  true,  1, 3);
            testTruncateToFit (5, 8,  1, 10, false, 5, 8);
            testTruncateToFit (1, 10, 4, 3,  true,  1, 2);
            testTruncateToFit (4, 3,  1, 10, false, 4, 3);
            testTruncateToFit (1, 3,  5, 3,  true,  1, 3);
            testTruncateToFit (5, 3,  1, 3,  false, 5, 3);
            testTruncateToFit (1, 3,  7, 3,  true,  1, 3);
            testTruncateToFit (7, 3,  1, 3,  false, 7, 3);
            testTruncateToFit (1, 10, 2, 10, false, 1, 10);
            testTruncateToFit (2, 10, 1, 10, false, 2, 10);
        }
    }

private:
    //==============================================================================
    void testOverlapsWith (int masterChannelFirst, int numNoteChannelsFirst,
                           int masterChannelSecond, int numNoteChannelsSecond,
                           bool expectedRetVal)
    {
        MPEZone first (masterChannelFirst, numNoteChannelsFirst);
        MPEZone second (masterChannelSecond, numNoteChannelsSecond);

        expect (first.overlapsWith (second) == expectedRetVal);
        expect (second.overlapsWith (first) == expectedRetVal);
    }

    //==============================================================================
    void testTruncateToFit (int masterChannelFirst, int numNoteChannelsFirst,
                            int masterChannelSecond, int numNoteChannelsSecond,
                            bool expectedRetVal,
                            int masterChannelFirstAfter, int numNoteChannelsFirstAfter)
    {
        MPEZone first (masterChannelFirst, numNoteChannelsFirst);
        MPEZone second (masterChannelSecond, numNoteChannelsSecond);

        expect (first.truncateToFit (second) == expectedRetVal);
        expectEquals (first.getMasterChannel(), masterChannelFirstAfter);
        expectEquals (first.getNumNoteChannels(), numNoteChannelsFirstAfter);
    }
};

static MPEZoneTests MPEZoneUnitTests;

#endif // JUCE_UNIT_TESTS