juce_MidiMessageCollector.h

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 /*
  ==============================================================================
 
   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
{
 
//==============================================================================
class JUCE_API  MidiMessageCollector    : public MidiKeyboardState::Listener,
                                          public MidiInputCallback
{
public:
    //==============================================================================
    MidiMessageCollector();
 
    ~MidiMessageCollector() override;
 
    //==============================================================================
    void reset (double sampleRate);
 
    void addMessageToQueue (const MidiMessage& message);
 
    void removeNextBlockOfMessages (MidiBuffer& destBuffer, int numSamples);
 
    void ensureStorageAllocated (size_t bytes);
 
 
    //==============================================================================
    void handleNoteOn (MidiKeyboardState*, int midiChannel, int midiNoteNumber, float velocity) override;
    void handleNoteOff (MidiKeyboardState*, int midiChannel, int midiNoteNumber, float velocity) override;
    void handleIncomingMidiMessage (MidiInput*, const MidiMessage&) override;
 
private:
    //==============================================================================
    double lastCallbackTime = 0;
    CriticalSection midiCallbackLock;
    MidiBuffer incomingMessages;
    double sampleRate = 44100.0;
   #if JUCE_DEBUG
    bool hasCalledReset = false;
   #endif
 
    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (MidiMessageCollector)
};
 
} // namespace juce