JUCE/modules/juce_audio_basics/mpe/juce_MPEZoneLayout.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.

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

MPEZoneLayout::MPEZoneLayout() noexcept
{
}

MPEZoneLayout::MPEZoneLayout (const MPEZoneLayout& other)
    : zones (other.zones)
{
}

MPEZoneLayout& MPEZoneLayout::operator= (const MPEZoneLayout& other)
{
    zones = other.zones;
    listeners.call (&MPEZoneLayout::Listener::zoneLayoutChanged, *this);
    return *this;
}

//==============================================================================
bool MPEZoneLayout::addZone (MPEZone newZone)
{
    bool noOtherZonesModified = true;

    for (int i = zones.size(); --i >= 0;)
    {
        MPEZone& zone = zones.getReference (i);

        if (zone.overlapsWith (newZone))
        {
            if (! zone.truncateToFit (newZone))
                zones.removeRange (i, 1);
                // can't use zones.remove (i) because that requires a default c'tor :-(

            noOtherZonesModified = false;
        }
    }

    zones.add (newZone);
    listeners.call (&MPEZoneLayout::Listener::zoneLayoutChanged, *this);
    return noOtherZonesModified;
}

//==============================================================================
int MPEZoneLayout::getNumZones() const noexcept
{
    return zones.size();
}

MPEZone* MPEZoneLayout::getZoneByIndex (int index) const noexcept
{
    if (zones.size() < index)
        return nullptr;

    return &(zones.getReference (index));
}

void MPEZoneLayout::clearAllZones()
{
    zones.clear();
    listeners.call (&MPEZoneLayout::Listener::zoneLayoutChanged, *this);
}

//==============================================================================
void MPEZoneLayout::processNextMidiEvent (const MidiMessage& message)
{
    if (! message.isController())
        return;

    MidiRPNMessage rpn;

    if (rpnDetector.parseControllerMessage (message.getChannel(),
                                            message.getControllerNumber(),
                                            message.getControllerValue(),
                                            rpn))
    {
        processRpnMessage (rpn);
    }
}

void MPEZoneLayout::processRpnMessage (MidiRPNMessage rpn)
{
    if (rpn.parameterNumber == MPEMessages::zoneLayoutMessagesRpnNumber)
        processZoneLayoutRpnMessage (rpn);
    else if (rpn.parameterNumber == 0)
        processPitchbendRangeRpnMessage (rpn);
}

void MPEZoneLayout::processZoneLayoutRpnMessage (MidiRPNMessage rpn)
{
    if (rpn.value < 16)
        addZone (MPEZone (rpn.channel - 1, rpn.value));
    else
        clearAllZones();
}

//==============================================================================
void MPEZoneLayout::processPitchbendRangeRpnMessage (MidiRPNMessage rpn)
{
    if (MPEZone* zone = getZoneByFirstNoteChannel (rpn.channel))
    {
        if (zone->getPerNotePitchbendRange() != rpn.value)
        {
            zone->setPerNotePitchbendRange (rpn.value);
            listeners.call (&MPEZoneLayout::Listener::zoneLayoutChanged, *this);
            return;
        }
    }

    if (MPEZone* zone = getZoneByMasterChannel (rpn.channel))
    {
        if (zone->getMasterPitchbendRange() != rpn.value)
        {
            zone->setMasterPitchbendRange (rpn.value);
            listeners.call (&MPEZoneLayout::Listener::zoneLayoutChanged, *this);
            return;
        }
    }
}

//==============================================================================
void MPEZoneLayout::processNextMidiBuffer (const MidiBuffer& buffer)
{
    MidiBuffer::Iterator iter (buffer);
    MidiMessage message;
    int samplePosition; // not actually used, so no need to initialise.

    while (iter.getNextEvent (message, samplePosition))
        processNextMidiEvent (message);
}

//==============================================================================
MPEZone* MPEZoneLayout::getZoneByChannel (int channel) const noexcept
{
    for (MPEZone* zone = zones.begin(); zone != zones.end(); ++zone)
        if (zone->isUsingChannel (channel))
            return zone;

    return nullptr;
}

MPEZone* MPEZoneLayout::getZoneByMasterChannel (int channel) const noexcept
{
    for (MPEZone* zone = zones.begin(); zone != zones.end(); ++zone)
        if (zone->getMasterChannel() == channel)
            return zone;

    return nullptr;
}

MPEZone* MPEZoneLayout::getZoneByFirstNoteChannel (int channel) const noexcept
{
    for (MPEZone* zone = zones.begin(); zone != zones.end(); ++zone)
        if (zone->getFirstNoteChannel() == channel)
            return zone;

    return nullptr;
}

MPEZone* MPEZoneLayout::getZoneByNoteChannel (int channel) const noexcept
{
    for (MPEZone* zone = zones.begin(); zone != zones.end(); ++zone)
        if (zone->isUsingChannelAsNoteChannel (channel))
            return zone;

    return nullptr;
}

//==============================================================================
void MPEZoneLayout::addListener (Listener* const listenerToAdd) noexcept
{
    listeners.add (listenerToAdd);
}

void MPEZoneLayout::removeListener (Listener* const listenerToRemove) noexcept
{
    listeners.remove (listenerToRemove);
}

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


class MPEZoneLayoutTests  : public UnitTest
{
public:
    MPEZoneLayoutTests() : UnitTest ("MPEZoneLayout class") {}

    void runTest() override
    {
        beginTest ("initialisation");
        {
            MPEZoneLayout layout;
            expectEquals (layout.getNumZones(), 0);
        }

        beginTest ("adding zones");
        {
            MPEZoneLayout layout;

            expect (layout.addZone (MPEZone (1, 7)));

            expectEquals (layout.getNumZones(), 1);
            expectEquals (layout.getZoneByIndex (0)->getMasterChannel(), 1);
            expectEquals (layout.getZoneByIndex (0)->getNumNoteChannels(), 7);

            expect (layout.addZone (MPEZone (9, 7)));

            expectEquals (layout.getNumZones(), 2);
            expectEquals (layout.getZoneByIndex (0)->getMasterChannel(), 1);
            expectEquals (layout.getZoneByIndex (0)->getNumNoteChannels(), 7);
            expectEquals (layout.getZoneByIndex (1)->getMasterChannel(), 9);
            expectEquals (layout.getZoneByIndex (1)->getNumNoteChannels(), 7);

            expect (! layout.addZone (MPEZone (5, 3)));

            expectEquals (layout.getNumZones(), 3);
            expectEquals (layout.getZoneByIndex (0)->getMasterChannel(), 1);
            expectEquals (layout.getZoneByIndex (0)->getNumNoteChannels(), 3);
            expectEquals (layout.getZoneByIndex (1)->getMasterChannel(), 9);
            expectEquals (layout.getZoneByIndex (1)->getNumNoteChannels(), 7);
            expectEquals (layout.getZoneByIndex (2)->getMasterChannel(), 5);
            expectEquals (layout.getZoneByIndex (2)->getNumNoteChannels(), 3);

            expect (! layout.addZone (MPEZone (5, 4)));

            expectEquals (layout.getNumZones(), 2);
            expectEquals (layout.getZoneByIndex (0)->getMasterChannel(), 1);
            expectEquals (layout.getZoneByIndex (0)->getNumNoteChannels(), 3);
            expectEquals (layout.getZoneByIndex (1)->getMasterChannel(), 5);
            expectEquals (layout.getZoneByIndex (1)->getNumNoteChannels(), 4);

            expect (! layout.addZone (MPEZone (6, 4)));

            expectEquals (layout.getNumZones(), 2);
            expectEquals (layout.getZoneByIndex (0)->getMasterChannel(), 1);
            expectEquals (layout.getZoneByIndex (0)->getNumNoteChannels(), 3);
            expectEquals (layout.getZoneByIndex (1)->getMasterChannel(), 6);
            expectEquals (layout.getZoneByIndex (1)->getNumNoteChannels(), 4);
        }

        beginTest ("querying zones");
        {
            MPEZoneLayout layout;

            layout.addZone (MPEZone (2, 5));
            layout.addZone (MPEZone (9, 4));

            expect (layout.getZoneByMasterChannel (1)  == nullptr);
            expect (layout.getZoneByMasterChannel (2)  != nullptr);
            expect (layout.getZoneByMasterChannel (3)  == nullptr);
            expect (layout.getZoneByMasterChannel (8)  == nullptr);
            expect (layout.getZoneByMasterChannel (9)  != nullptr);
            expect (layout.getZoneByMasterChannel (10) == nullptr);

            expectEquals (layout.getZoneByMasterChannel (2)->getNumNoteChannels(), 5);
            expectEquals (layout.getZoneByMasterChannel (9)->getNumNoteChannels(), 4);

            expect (layout.getZoneByFirstNoteChannel (2)  == nullptr);
            expect (layout.getZoneByFirstNoteChannel (3)  != nullptr);
            expect (layout.getZoneByFirstNoteChannel (4)  == nullptr);
            expect (layout.getZoneByFirstNoteChannel (9)  == nullptr);
            expect (layout.getZoneByFirstNoteChannel (10) != nullptr);
            expect (layout.getZoneByFirstNoteChannel (11) == nullptr);

            expectEquals (layout.getZoneByFirstNoteChannel (3)->getNumNoteChannels(), 5);
            expectEquals (layout.getZoneByFirstNoteChannel (10)->getNumNoteChannels(), 4);

            expect (layout.getZoneByNoteChannel (2)  == nullptr);
            expect (layout.getZoneByNoteChannel (3)  != nullptr);
            expect (layout.getZoneByNoteChannel (4)  != nullptr);
            expect (layout.getZoneByNoteChannel (6)  != nullptr);
            expect (layout.getZoneByNoteChannel (7)  != nullptr);
            expect (layout.getZoneByNoteChannel (8)  == nullptr);
            expect (layout.getZoneByNoteChannel (9)  == nullptr);
            expect (layout.getZoneByNoteChannel (10) != nullptr);
            expect (layout.getZoneByNoteChannel (11) != nullptr);
            expect (layout.getZoneByNoteChannel (12) != nullptr);
            expect (layout.getZoneByNoteChannel (13) != nullptr);
            expect (layout.getZoneByNoteChannel (14) == nullptr);

            expectEquals (layout.getZoneByNoteChannel (5)->getNumNoteChannels(), 5);
            expectEquals (layout.getZoneByNoteChannel (13)->getNumNoteChannels(), 4);
        }

        beginTest ("clear all zones");
        {
            MPEZoneLayout layout;

            expect (layout.addZone (MPEZone (1, 7)));
            expect (layout.addZone (MPEZone (10, 2)));
            layout.clearAllZones();

            expectEquals (layout.getNumZones(), 0);
        }

        beginTest ("process MIDI buffers");
        {
            MPEZoneLayout layout;
            MidiBuffer buffer;

            buffer = MPEMessages::addZone (MPEZone (1, 7));
            layout.processNextMidiBuffer (buffer);

            expectEquals (layout.getNumZones(), 1);
            expectEquals (layout.getZoneByIndex (0)->getMasterChannel(), 1);
            expectEquals (layout.getZoneByIndex (0)->getNumNoteChannels(), 7);

            buffer = MPEMessages::addZone (MPEZone (9, 7));
            layout.processNextMidiBuffer (buffer);

            expectEquals (layout.getNumZones(), 2);
            expectEquals (layout.getZoneByIndex (0)->getMasterChannel(), 1);
            expectEquals (layout.getZoneByIndex (0)->getNumNoteChannels(), 7);
            expectEquals (layout.getZoneByIndex (1)->getMasterChannel(), 9);
            expectEquals (layout.getZoneByIndex (1)->getNumNoteChannels(), 7);

            MPEZone zone (1, 10);

            buffer = MPEMessages::addZone (zone);
            layout.processNextMidiBuffer (buffer);

            expectEquals (layout.getNumZones(), 1);
            expectEquals (layout.getZoneByIndex (0)->getMasterChannel(), 1);
            expectEquals (layout.getZoneByIndex (0)->getNumNoteChannels(), 10);

            zone.setPerNotePitchbendRange (33);
            zone.setMasterPitchbendRange (44);

            buffer = MPEMessages::masterPitchbendRange (zone);
            buffer.addEvents (MPEMessages::perNotePitchbendRange (zone), 0, -1, 0);

            layout.processNextMidiBuffer (buffer);

            expectEquals (layout.getZoneByIndex (0)->getPerNotePitchbendRange(), 33);
            expectEquals (layout.getZoneByIndex (0)->getMasterPitchbendRange(), 44);
        }

        beginTest ("process individual MIDI messages");
        {
            MPEZoneLayout layout;

            layout.processNextMidiEvent (MidiMessage (0x80, 0x59, 0xd0));  // unrelated note-off msg
            layout.processNextMidiEvent (MidiMessage (0xb1, 0x64, 0x06));  // RPN part 1
            layout.processNextMidiEvent (MidiMessage (0xb1, 0x65, 0x00));  // RPN part 2
            layout.processNextMidiEvent (MidiMessage (0xb8, 0x0b, 0x66));  // unrelated CC msg
            layout.processNextMidiEvent (MidiMessage (0xb1, 0x06, 0x03));  // RPN part 3
            layout.processNextMidiEvent (MidiMessage (0x90, 0x60, 0x00));  // unrelated note-on msg

            expectEquals (layout.getNumZones(), 1);
            expectEquals (layout.getZoneByIndex (0)->getMasterChannel(), 1);
            expectEquals (layout.getZoneByIndex (0)->getNumNoteChannels(), 3);
        }
    }
};

static MPEZoneLayoutTests MPEZoneLayoutUnitTests;


#endif // JUCE_UNIT_TESTS