juce_UMPU32InputHandler.h

/*
  ==============================================================================
 
   This file is part of the JUCE library.
   Copyright (c) 2022 - Raw Material Software Limited
 
   JUCE is an open source library subject to commercial or open-source
   licensing.
 
   The code included in this file is provided 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.
 
   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
   DISCLAIMED.
 
  ==============================================================================
*/
 
#ifndef DOXYGEN
 
namespace juce::universal_midi_packets
{

struct U32InputHandler
{
    virtual ~U32InputHandler() noexcept = default;
 
    virtual void reset() = 0;
    virtual void pushMidiData (const uint32_t* begin, const uint32_t* end, double time) = 0;
};

struct U32ToBytestreamHandler : public U32InputHandler
{
    U32ToBytestreamHandler (MidiInput& i, MidiInputCallback& c)
        : input (i), callback (c), dispatcher (2048) {}

    class Factory
    {
    public:
        explicit Factory (MidiInputCallback* c)
            : callback (c) {}
 
        std::unique_ptr<U32ToBytestreamHandler> operator() (MidiInput& i) const
        {
            if (callback != nullptr)
                return std::make_unique<U32ToBytestreamHandler> (i, *callback);
 
            jassertfalse;
            return {};
        }
 
    private:
        MidiInputCallback* callback = nullptr;
    };
 
    void reset() override { dispatcher.reset(); }
 
    void pushMidiData (const uint32_t* begin, const uint32_t* end, double time) override
    {
        dispatcher.dispatch (begin, end, time, [this] (const BytestreamMidiView& m)
        {
            callback.handleIncomingMidiMessage (&input, m.getMessage());
        });
    }
 
    MidiInput& input;
    MidiInputCallback& callback;
    ToBytestreamDispatcher dispatcher;
};

struct U32ToUMPHandler : public U32InputHandler
{
    U32ToUMPHandler (PacketProtocol protocol, Receiver& c)
        : recipient (c), converter (protocol) {}

    class Factory
    {
    public:
        Factory (PacketProtocol p, Receiver& c)
            : protocol (p), callback (c) {}
 
        std::unique_ptr<U32ToUMPHandler> operator() (MidiInput&) const
        {
            return std::make_unique<U32ToUMPHandler> (protocol, callback);
        }
 
    private:
        PacketProtocol protocol;
        Receiver& callback;
    };
 
    void reset() override
    {
        dispatcher.reset();
        converter.reset();
    }
 
    void pushMidiData (const uint32_t* begin, const uint32_t* end, double time) override
    {
        dispatcher.dispatch (begin, end, time, [this] (const View& view, double thisTime)
        {
            converter.convert (view, [&] (const View& converted)
            {
                recipient.packetReceived (converted, thisTime);
            });
        });
    }
 
    Receiver& recipient;
    Dispatcher dispatcher;
    GenericUMPConverter converter;
};
 
} // namespace juce::universal_midi_packets
 
 
#endif