juce_MidiRPN.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.
 
  ==============================================================================
*/
 
namespace juce
{
 
//==============================================================================
struct MidiRPNMessage
{
    int channel;
 
    int parameterNumber;
 
    int value;
 
    bool isNRPN;
 
    bool is14BitValue;
};
 
//==============================================================================
class JUCE_API  MidiRPNDetector
{
public:
    MidiRPNDetector() noexcept = default;
 
    ~MidiRPNDetector() noexcept = default;
 
    void reset() noexcept;
 
    //==============================================================================
    [[deprecated ("Use tryParse() instead")]]
    bool parseControllerMessage (int midiChannel,
                                 int controllerNumber,
                                 int controllerValue,
                                 MidiRPNMessage& result) noexcept;
 
    std::optional<MidiRPNMessage> tryParse (int midiChannel,
                                            int controllerNumber,
                                            int controllerValue);
 
private:
    //==============================================================================
    struct ChannelState
    {
        std::optional<MidiRPNMessage> handleController (int channel, int controllerNumber,
                                                        int value) noexcept;
        void resetValue() noexcept;
        std::optional<MidiRPNMessage> sendIfReady (int channel) noexcept;
 
        uint8 parameterMSB = 0xff, parameterLSB = 0xff, valueMSB = 0xff, valueLSB = 0xff;
        bool isNRPN = false;
    };
 
    //==============================================================================
    ChannelState states[16];
 
    JUCE_LEAK_DETECTOR (MidiRPNDetector)
};
 
//==============================================================================
class JUCE_API  MidiRPNGenerator
{
public:
    //==============================================================================
    static MidiBuffer generate (MidiRPNMessage message);
 
    //==============================================================================
    static MidiBuffer generate (int channel,
                                int parameterNumber,
                                int value,
                                bool isNRPN = false,
                                bool use14BitValue = true);
};
 
} // namespace juce