Remove juce_audio_devices

7 years ago · ff1bec4635
--- a/source/modules/juce_audio_devices/Makefile
+++ b/source/modules/juce_audio_devices/Makefile
@@ -1,125 +0,0 @@
 #!/usr/bin/make -f
 # Makefile for juce_audio_devices #
 # ------------------------------- #
 # Created by falkTX
 #

 CWD=../..
 MODULENAME=juce_audio_devices
 include ../Makefile.mk

 # ----------------------------------------------------------------------------------------------------------------------------

 BUILD_CXX_FLAGS += $(JUCE_AUDIO_DEVICES_FLAGS) -I..

 ifeq ($(WIN32),true)
 BUILD_CXX_FLAGS += -Wno-missing-field-initializers
 # BUILD_CXX_FLAGS += -I$(CWD)/includes/asio
 BUILD_CXX_FLAGS += -I$(CWD)/modules/rtaudio/include
 endif

 # ----------------------------------------------------------------------------------------------------------------------------

 ifeq ($(MACOS),true)
 OBJS         = $(OBJDIR)/$(MODULENAME).mm.o
 OBJS_posix32 = $(OBJDIR)/$(MODULENAME).mm.posix32.o
 OBJS_posix64 = $(OBJDIR)/$(MODULENAME).mm.posix64.o
 else
 OBJS         = $(OBJDIR)/$(MODULENAME).cpp.o
 OBJS_posix32 = $(OBJDIR)/$(MODULENAME).cpp.posix32.o
 OBJS_posix64 = $(OBJDIR)/$(MODULENAME).cpp.posix64.o
 endif
 OBJS_win32   = $(OBJDIR)/$(MODULENAME).cpp.win32.o
 OBJS_win64   = $(OBJDIR)/$(MODULENAME).cpp.win64.o

 # ----------------------------------------------------------------------------------------------------------------------------

 all:     $(MODULEDIR)/$(MODULENAME).a
 posix32: $(MODULEDIR)/$(MODULENAME).posix32.a
 posix64: $(MODULEDIR)/$(MODULENAME).posix64.a
 win32:   $(MODULEDIR)/$(MODULENAME).win32.a
 win64:   $(MODULEDIR)/$(MODULENAME).win64.a

 # ----------------------------------------------------------------------------------------------------------------------------

 clean:
 	rm -f $(OBJDIR)/*.o $(MODULEDIR)/$(MODULENAME)*.a

 debug:
 	$(MAKE) DEBUG=true

 # ----------------------------------------------------------------------------------------------------------------------------

 $(MODULEDIR)/$(MODULENAME).a: $(OBJS)
 	-@mkdir -p $(MODULEDIR)
 	@echo "Creating $(MODULENAME).a"
 	@rm -f $@
 	@$(AR) crs $@ $^

 $(MODULEDIR)/$(MODULENAME).posix32.a: $(OBJS_posix32)
 	-@mkdir -p $(MODULEDIR)
 	@echo "Creating $(MODULENAME).posix32.a"
 	@rm -f $@
 	@$(AR) crs $@ $^

 $(MODULEDIR)/$(MODULENAME).posix64.a: $(OBJS_posix64)
 	-@mkdir -p $(MODULEDIR)
 	@echo "Creating $(MODULENAME).posix64.a"
 	@rm -f $@
 	@$(AR) crs $@ $^

 $(MODULEDIR)/$(MODULENAME).win32.a: $(OBJS_win32)
 	-@mkdir -p $(MODULEDIR)
 	@echo "Creating $(MODULENAME).win32.a"
 	@rm -f $@
 	@$(AR) crs $@ $^

 $(MODULEDIR)/$(MODULENAME).win64.a: $(OBJS_win64)
 	-@mkdir -p $(MODULEDIR)
 	@echo "Creating $(MODULENAME).win64.a"
 	@rm -f $@
 	@$(AR) crs $@ $^

 # ----------------------------------------------------------------------------------------------------------------------------

 $(OBJDIR)/$(MODULENAME).cpp.o: $(MODULENAME).cpp
 	-@mkdir -p $(OBJDIR)
 	@echo "Compiling $<"
 	@$(CXX) $< $(BUILD_CXX_FLAGS) -c -o $@

 $(OBJDIR)/$(MODULENAME).cpp.%32.o: $(MODULENAME).cpp
 	-@mkdir -p $(OBJDIR)
 	@echo "Compiling $< (32bit)"
 	@$(CXX) $< $(BUILD_CXX_FLAGS) $(32BIT_FLAGS) -c -o $@

 $(OBJDIR)/$(MODULENAME).cpp.%64.o: $(MODULENAME).cpp
 	-@mkdir -p $(OBJDIR)
 	@echo "Compiling $< (64bit)"
 	@$(CXX) $< $(BUILD_CXX_FLAGS) $(64BIT_FLAGS) -c -o $@

 # ----------------------------------------------------------------------------------------------------------------------------

 $(OBJDIR)/$(MODULENAME).mm.o: $(MODULENAME).cpp
 	-@mkdir -p $(OBJDIR)
 	@echo "Compiling $<"
 	@$(CXX) $< $(BUILD_CXX_FLAGS) -ObjC++ -c -o $@

 $(OBJDIR)/$(MODULENAME).mm.%32.o: $(MODULENAME).cpp
 	-@mkdir -p $(OBJDIR)
 	@echo "Compiling $< (32bit)"
 	@$(CXX) $< $(BUILD_CXX_FLAGS) $(32BIT_FLAGS) -ObjC++ -c -o $@

 $(OBJDIR)/$(MODULENAME).mm.%64.o: $(MODULENAME).cpp
 	-@mkdir -p $(OBJDIR)
 	@echo "Compiling $< (64bit)"
 	@$(CXX) $< $(BUILD_CXX_FLAGS) $(64BIT_FLAGS) -ObjC++ -c -o $@

 # ----------------------------------------------------------------------------------------------------------------------------

 -include $(OBJS:%.o=%.d)
 -include $(OBJS_posix32:%.o=%.d)
 -include $(OBJS_posix64:%.o=%.d)
 -include $(OBJS_win32:%.o=%.d)
 -include $(OBJS_win64:%.o=%.d)

 # ----------------------------------------------------------------------------------------------------------------------------
--- a/source/modules/juce_audio_devices/audio_io/juce_AudioDeviceManager.cpp
+++ b/source/modules/juce_audio_devices/audio_io/juce_AudioDeviceManager.cpp
--- a/source/modules/juce_audio_devices/audio_io/juce_AudioDeviceManager.h
+++ b/source/modules/juce_audio_devices/audio_io/juce_AudioDeviceManager.h
@@ -1,532 +0,0 @@
 /*
  ==============================================================================

   This file is part of the JUCE library.
   Copyright (c) 2017 - ROLI Ltd.

   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
 {

 //==============================================================================
 /**
    Manages the state of some audio and midi i/o devices.

    This class keeps tracks of a currently-selected audio device, through
    with which it continuously streams data from an audio callback, as well as
    one or more midi inputs.

    The idea is that your application will create one global instance of this object,
    and let it take care of creating and deleting specific types of audio devices
    internally. So when the device is changed, your callbacks will just keep running
    without having to worry about this.

    The manager can save and reload all of its device settings as XML, which
    makes it very easy for you to save and reload the audio setup of your
    application.

    And to make it easy to let the user change its settings, there's a component
    to do just that - the AudioDeviceSelectorComponent class, which contains a set of
    device selection/sample-rate/latency controls.

    To use an AudioDeviceManager, create one, and use initialise() to set it up. Then
    call addAudioCallback() to register your audio callback with it, and use that to process
    your audio data.

    The manager also acts as a handy hub for incoming midi messages, allowing a
    listener to register for messages from either a specific midi device, or from whatever
    the current default midi input device is. The listener then doesn't have to worry about
    re-registering with different midi devices if they are changed or deleted.

    And yet another neat trick is that amount of CPU time being used is measured and
    available with the getCpuUsage() method.

    The AudioDeviceManager is a ChangeBroadcaster, and will send a change message to
    listeners whenever one of its settings is changed.

    @see AudioDeviceSelectorComponent, AudioIODevice, AudioIODeviceType
 */
 class JUCE_API  AudioDeviceManager  : public ChangeBroadcaster
 {
 public:
    //==============================================================================
    /** Creates a default AudioDeviceManager.

        Initially no audio device will be selected. You should call the initialise() method
        and register an audio callback with setAudioCallback() before it'll be able to
        actually make any noise.
    */
    AudioDeviceManager();

    /** Destructor. */
    ~AudioDeviceManager();

    //==============================================================================
    /**
        This structure holds a set of properties describing the current audio setup.

        An AudioDeviceManager uses this class to save/load its current settings, and to
        specify your preferred options when opening a device.

        @see AudioDeviceManager::setAudioDeviceSetup(), AudioDeviceManager::initialise()
    */
    struct JUCE_API  AudioDeviceSetup
    {
        /** Creates an AudioDeviceSetup object.

            The default constructor sets all the member variables to indicate default values.
            You can then fill-in any values you want to before passing the object to
            AudioDeviceManager::initialise().
        */
        AudioDeviceSetup();

        bool operator== (const AudioDeviceSetup& other) const;

        /** The name of the audio device used for output.
            The name has to be one of the ones listed by the AudioDeviceManager's currently
            selected device type.
            This may be the same as the input device.
            An empty string indicates the default device.
        */
        String outputDeviceName;

        /** The name of the audio device used for input.
            This may be the same as the output device.
            An empty string indicates the default device.
        */
        String inputDeviceName;

        /** The current sample rate.
            This rate is used for both the input and output devices.
            A value of 0 indicates that you don't care what rate is used, and the
            device will choose a sensible rate for you.
        */
        double sampleRate;

        /** The buffer size, in samples.
            This buffer size is used for both the input and output devices.
            A value of 0 indicates the default buffer size.
        */
        int bufferSize;

        /** The set of active input channels.
            The bits that are set in this array indicate the channels of the
            input device that are active.
            If useDefaultInputChannels is true, this value is ignored.
        */
        BigInteger inputChannels;

        /** If this is true, it indicates that the inputChannels array
            should be ignored, and instead, the device's default channels
            should be used.
        */
        bool useDefaultInputChannels;

        /** The set of active output channels.
            The bits that are set in this array indicate the channels of the
            input device that are active.
            If useDefaultOutputChannels is true, this value is ignored.
        */
        BigInteger outputChannels;

        /** If this is true, it indicates that the outputChannels array
            should be ignored, and instead, the device's default channels
            should be used.
        */
        bool useDefaultOutputChannels;
    };


    //==============================================================================
    /** Opens a set of audio devices ready for use.

        This will attempt to open either a default audio device, or one that was
        previously saved as XML.

        @param numInputChannelsNeeded       the maximum number of input channels your app would like to
                                            use (the actual number of channels opened may be less than
                                            the number requested)
        @param numOutputChannelsNeeded      the maximum number of output channels your app would like to
                                            use (the actual number of channels opened may be less than
                                            the number requested)
        @param savedState                   either a previously-saved state that was produced
                                            by createStateXml(), or nullptr if you want the manager
                                            to choose the best device to open.
        @param selectDefaultDeviceOnFailure if true, then if the device specified in the XML
                                            fails to open, then a default device will be used
                                            instead. If false, then on failure, no device is
                                            opened.
        @param preferredDefaultDeviceName   if this is not empty, and there's a device with this
                                            name, then that will be used as the default device
                                            (assuming that there wasn't one specified in the XML).
                                            The string can actually be a simple wildcard, containing "*"
                                            and "?" characters
        @param preferredSetupOptions        if this is non-null, the structure will be used as the
                                            set of preferred settings when opening the device. If you
                                            use this parameter, the preferredDefaultDeviceName
                                            field will be ignored

        @returns an error message if anything went wrong, or an empty string if it worked ok.
    */
    String initialise (int numInputChannelsNeeded,
                       int numOutputChannelsNeeded,
                       const XmlElement* savedState,
                       bool selectDefaultDeviceOnFailure,
                       const String& preferredDefaultDeviceName = String(),
                       const AudioDeviceSetup* preferredSetupOptions = nullptr);

    /** Resets everything to a default device setup, clearing any stored settings. */
    String initialiseWithDefaultDevices (int numInputChannelsNeeded,
                                         int numOutputChannelsNeeded);

    /** Returns some XML representing the current state of the manager.

        This stores the current device, its samplerate, block size, etc, and
        can be restored later with initialise().

        Note that this can return a null pointer if no settings have been explicitly changed
        (i.e. if the device manager has just been left in its default state).
    */
    XmlElement* createStateXml() const;

    //==============================================================================
    /** Returns the current device properties that are in use.
        @see setAudioDeviceSetup
    */
    void getAudioDeviceSetup (AudioDeviceSetup& result) const;

    /** Changes the current device or its settings.

        If you want to change a device property, like the current sample rate or
        block size, you can call getAudioDeviceSetup() to retrieve the current
        settings, then tweak the appropriate fields in the AudioDeviceSetup structure,
        and pass it back into this method to apply the new settings.

        @param newSetup             the settings that you'd like to use
        @param treatAsChosenDevice  if this is true and if the device opens correctly, these new
                                    settings will be taken as having been explicitly chosen by the
                                    user, and the next time createStateXml() is called, these settings
                                    will be returned. If it's false, then the device is treated as a
                                    temporary or default device, and a call to createStateXml() will
                                    return either the last settings that were made with treatAsChosenDevice
                                    as true, or the last XML settings that were passed into initialise().
        @returns an error message if anything went wrong, or an empty string if it worked ok.

        @see getAudioDeviceSetup
    */
    String setAudioDeviceSetup (const AudioDeviceSetup& newSetup,
                                bool treatAsChosenDevice);


    /** Returns the currently-active audio device. */
    AudioIODevice* getCurrentAudioDevice() const noexcept               { return currentAudioDevice; }

    /** Returns the type of audio device currently in use.
        @see setCurrentAudioDeviceType
    */
    String getCurrentAudioDeviceType() const                            { return currentDeviceType; }

    /** Returns the currently active audio device type object.
        Don't keep a copy of this pointer - it's owned by the device manager and could
        change at any time.
    */
    AudioIODeviceType* getCurrentDeviceTypeObject() const;

    /** Changes the class of audio device being used.

        This switches between, e.g. ASIO and DirectSound. On the Mac you probably won't ever call
        this because there's only one type: CoreAudio.

        For a list of types, see getAvailableDeviceTypes().
    */
    void setCurrentAudioDeviceType (const String& type,
                                    bool treatAsChosenDevice);

    /** Closes the currently-open device.
        You can call restartLastAudioDevice() later to reopen it in the same state
        that it was just in.
    */
    void closeAudioDevice();

    /** Tries to reload the last audio device that was running.

        Note that this only reloads the last device that was running before
        closeAudioDevice() was called - it doesn't reload any kind of saved-state,
        and can only be called after a device has been opened with SetAudioDevice().

        If a device is already open, this call will do nothing.
    */
    void restartLastAudioDevice();

    //==============================================================================
    /** Registers an audio callback to be used.

        The manager will redirect callbacks from whatever audio device is currently
        in use to all registered callback objects. If more than one callback is
        active, they will all be given the same input data, and their outputs will
        be summed.

        If necessary, this method will invoke audioDeviceAboutToStart() on the callback
        object before returning.

        To remove a callback, use removeAudioCallback().
    */
    void addAudioCallback (AudioIODeviceCallback* newCallback);

    /** Deregisters a previously added callback.

        If necessary, this method will invoke audioDeviceStopped() on the callback
        object before returning.

        @see addAudioCallback
    */
    void removeAudioCallback (AudioIODeviceCallback* callback);

    //==============================================================================
    /** Returns the average proportion of available CPU being spent inside the audio callbacks.
        @returns  A value between 0 and 1.0 to indicate the approximate proportion of CPU
                  time spent in the callbacks.
    */
    double getCpuUsage() const;

    //==============================================================================
    /** Enables or disables a midi input device.

        The list of devices can be obtained with the MidiInput::getDevices() method.

        Any incoming messages from enabled input devices will be forwarded on to all the
        listeners that have been registered with the addMidiInputCallback() method. They
        can either register for messages from a particular device, or from just the
        "default" midi input.

        Routing the midi input via an AudioDeviceManager means that when a listener
        registers for the default midi input, this default device can be changed by the
        manager without the listeners having to know about it or re-register.

        It also means that a listener can stay registered for a midi input that is disabled
        or not present, so that when the input is re-enabled, the listener will start
        receiving messages again.

        @see addMidiInputCallback, isMidiInputEnabled
    */
    void setMidiInputEnabled (const String& midiInputDeviceName, bool enabled);

    /** Returns true if a given midi input device is being used.
        @see setMidiInputEnabled
    */
    bool isMidiInputEnabled (const String& midiInputDeviceName) const;

    /** Registers a listener for callbacks when midi events arrive from a midi input.

        The device name can be empty to indicate that it wants to receive all incoming
        events from all the enabled MIDI inputs. Or it can be the name of one of the
        MIDI input devices if it just wants the events from that device. (see
        MidiInput::getDevices() for the list of device names).

        Only devices which are enabled (see the setMidiInputEnabled() method) will have their
        events forwarded on to listeners.
    */
    void addMidiInputCallback (const String& midiInputDeviceName,
                               MidiInputCallback* callback);

    /** Removes a listener that was previously registered with addMidiInputCallback(). */
    void removeMidiInputCallback (const String& midiInputDeviceName,
                                  MidiInputCallback* callback);

    //==============================================================================
    /** Sets a midi output device to use as the default.

        The list of devices can be obtained with the MidiOutput::getDevices() method.

        The specified device will be opened automatically and can be retrieved with the
        getDefaultMidiOutput() method.

        Pass in an empty string to deselect all devices. For the default device, you
        can use MidiOutput::getDevices() [MidiOutput::getDefaultDeviceIndex()].

        @see getDefaultMidiOutput, getDefaultMidiOutputName
    */
    void setDefaultMidiOutput (const String& deviceName);

    /** Returns the name of the default midi output.
        @see setDefaultMidiOutput, getDefaultMidiOutput
    */
    const String& getDefaultMidiOutputName() const noexcept         { return defaultMidiOutputName; }

    /** Returns the current default midi output device.
        If no device has been selected, or the device can't be opened, this will return nullptr.
        @see getDefaultMidiOutputName
    */
    MidiOutput* getDefaultMidiOutput() const noexcept               { return defaultMidiOutput; }

    /** Returns a list of the types of device supported. */
    const OwnedArray<AudioIODeviceType>& getAvailableDeviceTypes();

    //==============================================================================
    /** Creates a list of available types.

        This will add a set of new AudioIODeviceType objects to the specified list, to
        represent each available types of device.

        You can override this if your app needs to do something specific, like avoid
        using DirectSound devices, etc.
    */
    virtual void createAudioDeviceTypes (OwnedArray<AudioIODeviceType>& types);

    /** Adds a new device type to the list of types.
        The manager will take ownership of the object that is passed-in.
    */
    void addAudioDeviceType (AudioIODeviceType* newDeviceType);

    //==============================================================================
    /** Plays a beep through the current audio device.

        This is here to allow the audio setup UI panels to easily include a "test"
        button so that the user can check where the audio is coming from.
    */
    void playTestSound();

    //==============================================================================
    /** Turns on level-measuring for input channels.
        @see getCurrentInputLevel()
    */
    void enableInputLevelMeasurement (bool enableMeasurement) noexcept;

    /** Turns on level-measuring for output channels.
        @see getCurrentOutputLevel()
    */
    void enableOutputLevelMeasurement (bool enableMeasurement) noexcept;

    /** Returns the current input level.
        To use this, you must first enable it by calling enableInputLevelMeasurement().
        @see enableInputLevelMeasurement()
    */
    double getCurrentInputLevel() const noexcept;

    /** Returns the current output level.
        To use this, you must first enable it by calling enableOutputLevelMeasurement().
        @see enableOutputLevelMeasurement()
    */
    double getCurrentOutputLevel() const noexcept;

    /** Returns the a lock that can be used to synchronise access to the audio callback.
        Obviously while this is locked, you're blocking the audio thread from running, so
        it must only be used for very brief periods when absolutely necessary.
    */
    CriticalSection& getAudioCallbackLock() noexcept        { return audioCallbackLock; }

    /** Returns the a lock that can be used to synchronise access to the midi callback.
        Obviously while this is locked, you're blocking the midi system from running, so
        it must only be used for very brief periods when absolutely necessary.
    */
    CriticalSection& getMidiCallbackLock() noexcept         { return midiCallbackLock; }

    //==============================================================================
    /** Returns the number of under- or over runs reported.

        This method will use the underlying device's native getXRunCount if it supports
        it. Otherwise it will estimate the number of under-/overruns by measuring the
        time it spent in the audio callback.
    */
    int getXRunCount() const noexcept;

 private:
    //==============================================================================
    OwnedArray<AudioIODeviceType> availableDeviceTypes;
    OwnedArray<AudioDeviceSetup> lastDeviceTypeConfigs;

    AudioDeviceSetup currentSetup;
    ScopedPointer<AudioIODevice> currentAudioDevice;
    Array<AudioIODeviceCallback*> callbacks;
    int numInputChansNeeded, numOutputChansNeeded;
    String currentDeviceType;
    BigInteger inputChannels, outputChannels;
    ScopedPointer<XmlElement> lastExplicitSettings;
    mutable bool listNeedsScanning;
    AudioSampleBuffer tempBuffer;

    struct MidiCallbackInfo
    {
        String deviceName;
        MidiInputCallback* callback;
    };

    StringArray midiInsFromXml;
    OwnedArray<MidiInput> enabledMidiInputs;
    Array<MidiCallbackInfo> midiCallbacks;

    String defaultMidiOutputName;
    ScopedPointer<MidiOutput> defaultMidiOutput;
    CriticalSection audioCallbackLock, midiCallbackLock;

    ScopedPointer<AudioSampleBuffer> testSound;
    int testSoundPosition;

    double cpuUsageMs, timeToCpuScale, msPerBlock;
    int xruns;

    struct LevelMeter
    {
        LevelMeter() noexcept;
        void updateLevel (const float* const*, int numChannels, int numSamples) noexcept;
        void setEnabled (bool) noexcept;
        double getCurrentLevel() const noexcept;

        Atomic<int> enabled;
        double level;
    };

    LevelMeter inputLevelMeter, outputLevelMeter;

    //==============================================================================
    class CallbackHandler;
    friend class CallbackHandler;
    friend struct ContainerDeletePolicy<CallbackHandler>;
    ScopedPointer<CallbackHandler> callbackHandler;

    void audioDeviceIOCallbackInt (const float** inputChannelData, int totalNumInputChannels,
                                   float** outputChannelData, int totalNumOutputChannels, int numSamples);
    void audioDeviceAboutToStartInt (AudioIODevice*);
    void audioDeviceStoppedInt();
    void audioDeviceErrorInt (const String&);
    void handleIncomingMidiMessageInt (MidiInput*, const MidiMessage&);
    void audioDeviceListChanged();

    String restartDevice (int blockSizeToUse, double sampleRateToUse,
                          const BigInteger& ins, const BigInteger& outs);
    void stopDevice();

    void updateXml();

    void createDeviceTypesIfNeeded();
    void scanDevicesIfNeeded();
    void deleteCurrentDevice();
    double chooseBestSampleRate (double preferred) const;
    int chooseBestBufferSize (int preferred) const;
    void insertDefaultDeviceNames (AudioDeviceSetup&) const;
    String initialiseDefault (const String& preferredDefaultDeviceName, const AudioDeviceSetup*);
    String initialiseFromXML (const XmlElement&, bool selectDefaultDeviceOnFailure,
                              const String& preferredDefaultDeviceName, const AudioDeviceSetup*);

    AudioIODeviceType* findType (const String& inputName, const String& outputName);
    AudioIODeviceType* findType (const String& typeName);

    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (AudioDeviceManager)
 };

 } // namespace juce
--- a/source/modules/juce_audio_devices/audio_io/juce_AudioIODevice.cpp
+++ b/source/modules/juce_audio_devices/audio_io/juce_AudioIODevice.cpp
@@ -1,45 +0,0 @@
 /*
  ==============================================================================

   This file is part of the JUCE library.
   Copyright (c) 2017 - ROLI Ltd.

   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
 {

 AudioIODevice::AudioIODevice (const String& deviceName, const String& deviceTypeName)
    : name (deviceName), typeName (deviceTypeName)
 {
 }

 AudioIODevice::~AudioIODevice() {}

 void AudioIODeviceCallback::audioDeviceError (const String&)    {}
 bool AudioIODevice::setAudioPreprocessingEnabled (bool)         { return false; }
 bool AudioIODevice::hasControlPanel() const                     { return false; }
 int  AudioIODevice::getXRunCount() const noexcept               { return -1; }

 bool AudioIODevice::showControlPanel()
 {
    jassertfalse;    // this should only be called for devices which return true from
                     // their hasControlPanel() method.
    return false;
 }

 } // namespace juce
--- a/source/modules/juce_audio_devices/audio_io/juce_AudioIODevice.h
+++ b/source/modules/juce_audio_devices/audio_io/juce_AudioIODevice.h
@@ -1,319 +0,0 @@
 /*
  ==============================================================================

   This file is part of the JUCE library.
   Copyright (c) 2017 - ROLI Ltd.

   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 AudioIODevice;


 //==============================================================================
 /**
    One of these is passed to an AudioIODevice object to stream the audio data
    in and out.

    The AudioIODevice will repeatedly call this class's audioDeviceIOCallback()
    method on its own high-priority audio thread, when it needs to send or receive
    the next block of data.

    @see AudioIODevice, AudioDeviceManager
 */
 class JUCE_API  AudioIODeviceCallback
 {
 public:
    /** Destructor. */
    virtual ~AudioIODeviceCallback()  {}

    /** Processes a block of incoming and outgoing audio data.

        The subclass's implementation should use the incoming audio for whatever
        purposes it needs to, and must fill all the output channels with the next
        block of output data before returning.

        The channel data is arranged with the same array indices as the channel name
        array returned by AudioIODevice::getOutputChannelNames(), but those channels
        that aren't specified in AudioIODevice::open() will have a null pointer for their
        associated channel, so remember to check for this.

        @param inputChannelData     a set of arrays containing the audio data for each
                                    incoming channel - this data is valid until the function
                                    returns. There will be one channel of data for each input
                                    channel that was enabled when the audio device was opened
                                    (see AudioIODevice::open())
        @param numInputChannels     the number of pointers to channel data in the
                                    inputChannelData array.
        @param outputChannelData    a set of arrays which need to be filled with the data
                                    that should be sent to each outgoing channel of the device.
                                    There will be one channel of data for each output channel
                                    that was enabled when the audio device was opened (see
                                    AudioIODevice::open())
                                    The initial contents of the array is undefined, so the
                                    callback function must fill all the channels with zeros if
                                    its output is silence. Failing to do this could cause quite
                                    an unpleasant noise!
        @param numOutputChannels    the number of pointers to channel data in the
                                    outputChannelData array.
        @param numSamples           the number of samples in each channel of the input and
                                    output arrays. The number of samples will depend on the
                                    audio device's buffer size and will usually remain constant,
                                    although this isn't guaranteed, so make sure your code can
                                    cope with reasonable changes in the buffer size from one
                                    callback to the next.
    */
    virtual void audioDeviceIOCallback (const float** inputChannelData,
                                        int numInputChannels,
                                        float** outputChannelData,
                                        int numOutputChannels,
                                        int numSamples) = 0;

    /** Called to indicate that the device is about to start calling back.

        This will be called just before the audio callbacks begin, either when this
        callback has just been added to an audio device, or after the device has been
        restarted because of a sample-rate or block-size change.

        You can use this opportunity to find out the sample rate and block size
        that the device is going to use by calling the AudioIODevice::getCurrentSampleRate()
        and AudioIODevice::getCurrentBufferSizeSamples() on the supplied pointer.

        @param device       the audio IO device that will be used to drive the callback.
                            Note that if you're going to store this this pointer, it is
                            only valid until the next time that audioDeviceStopped is called.
    */
    virtual void audioDeviceAboutToStart (AudioIODevice* device) = 0;

    /** Called to indicate that the device has stopped. */
    virtual void audioDeviceStopped() = 0;

    /** This can be overridden to be told if the device generates an error while operating.
        Be aware that this could be called by any thread! And not all devices perform
        this callback.
    */
    virtual void audioDeviceError (const String& errorMessage);
 };


 //==============================================================================
 /**
    Base class for an audio device with synchronised input and output channels.

    Subclasses of this are used to implement different protocols such as DirectSound,
    ASIO, CoreAudio, etc.

    To create one of these, you'll need to use the AudioIODeviceType class - see the
    documentation for that class for more info.

    For an easier way of managing audio devices and their settings, have a look at the
    AudioDeviceManager class.

    @see AudioIODeviceType, AudioDeviceManager
 */
 class JUCE_API  AudioIODevice
 {
 public:
    /** Destructor. */
    virtual ~AudioIODevice();

    //==============================================================================
    /** Returns the device's name, (as set in the constructor). */
    const String& getName() const noexcept                          { return name; }

    /** Returns the type of the device.

        E.g. "CoreAudio", "ASIO", etc. - this comes from the AudioIODeviceType that created it.
    */
    const String& getTypeName() const noexcept                      { return typeName; }

    //==============================================================================
    /** Returns the names of all the available output channels on this device.
        To find out which of these are currently in use, call getActiveOutputChannels().
    */
    virtual StringArray getOutputChannelNames() = 0;

    /** Returns the names of all the available input channels on this device.
        To find out which of these are currently in use, call getActiveInputChannels().
    */
    virtual StringArray getInputChannelNames() = 0;

    //==============================================================================
    /** Returns the set of sample-rates this device supports.
        @see getCurrentSampleRate
    */
    virtual Array<double> getAvailableSampleRates() = 0;

    /** Returns the set of buffer sizes that are available.
        @see getCurrentBufferSizeSamples, getDefaultBufferSize
    */
    virtual Array<int> getAvailableBufferSizes() = 0;

    /** Returns the default buffer-size to use.
        @returns a number of samples
        @see getAvailableBufferSizes
    */
    virtual int getDefaultBufferSize() = 0;

    //==============================================================================
    /** Tries to open the device ready to play.

        @param inputChannels        a BigInteger in which a set bit indicates that the corresponding
                                    input channel should be enabled
        @param outputChannels       a BigInteger in which a set bit indicates that the corresponding
                                    output channel should be enabled
        @param sampleRate           the sample rate to try to use - to find out which rates are
                                    available, see getAvailableSampleRates()
        @param bufferSizeSamples    the size of i/o buffer to use - to find out the available buffer
                                    sizes, see getAvailableBufferSizes()
        @returns    an error description if there's a problem, or an empty string if it succeeds in
                    opening the device
        @see close
    */
    virtual String open (const BigInteger& inputChannels,
                         const BigInteger& outputChannels,
                         double sampleRate,
                         int bufferSizeSamples) = 0;

    /** Closes and releases the device if it's open. */
    virtual void close() = 0;

    /** Returns true if the device is still open.

        A device might spontaneously close itself if something goes wrong, so this checks if
        it's still open.
    */
    virtual bool isOpen() = 0;

    /** Starts the device actually playing.

        This must be called after the device has been opened.

        @param callback     the callback to use for streaming the data.
        @see AudioIODeviceCallback, open
    */
    virtual void start (AudioIODeviceCallback* callback) = 0;

    /** Stops the device playing.

        Once a device has been started, this will stop it. Any pending calls to the
        callback class will be flushed before this method returns.
    */
    virtual void stop() = 0;

    /** Returns true if the device is still calling back.

        The device might mysteriously stop, so this checks whether it's
        still playing.
    */
    virtual bool isPlaying() = 0;

    /** Returns the last error that happened if anything went wrong. */
    virtual String getLastError() = 0;

    //==============================================================================
    /** Returns the buffer size that the device is currently using.

        If the device isn't actually open, this value doesn't really mean much.
    */
    virtual int getCurrentBufferSizeSamples() = 0;

    /** Returns the sample rate that the device is currently using.

        If the device isn't actually open, this value doesn't really mean much.
    */
    virtual double getCurrentSampleRate() = 0;

    /** Returns the device's current physical bit-depth.

        If the device isn't actually open, this value doesn't really mean much.
    */
    virtual int getCurrentBitDepth() = 0;

    /** Returns a mask showing which of the available output channels are currently
        enabled.
        @see getOutputChannelNames
    */
    virtual BigInteger getActiveOutputChannels() const = 0;

    /** Returns a mask showing which of the available input channels are currently
        enabled.
        @see getInputChannelNames
    */
    virtual BigInteger getActiveInputChannels() const = 0;

    /** Returns the device's output latency.

        This is the delay in samples between a callback getting a block of data, and
        that data actually getting played.
    */
    virtual int getOutputLatencyInSamples() = 0;

    /** Returns the device's input latency.

        This is the delay in samples between some audio actually arriving at the soundcard,
        and the callback getting passed this block of data.
    */
    virtual int getInputLatencyInSamples() = 0;


    //==============================================================================
    /** True if this device can show a pop-up control panel for editing its settings.

        This is generally just true of ASIO devices. If true, you can call showControlPanel()
        to display it.
    */
    virtual bool hasControlPanel() const;

    /** Shows a device-specific control panel if there is one.

        This should only be called for devices which return true from hasControlPanel().
    */
    virtual bool showControlPanel();

    /** On devices which support it, this allows automatic gain control or other
        mic processing to be disabled.
        If the device doesn't support this operation, it'll return false.
    */
    virtual bool setAudioPreprocessingEnabled (bool shouldBeEnabled);

    //==============================================================================
    /** Returns the number of under- or over runs reported by the OS since
        playback/recording has started.

        This number may be different than determining the Xrun count manually (by
        measuring the time spent in the audio callback) as the OS may be doing
        some buffering internally - especially on mobile devices.

        Returns -1 if playback/recording has not started yet or if getting the underrun
        count is not supported for this device (Android SDK 23 and lower).
    */
    virtual int getXRunCount() const noexcept;

    //==============================================================================
 protected:
    /** Creates a device, setting its name and type member variables. */
    AudioIODevice (const String& deviceName,
                   const String& typeName);

    /** @internal */
    String name, typeName;
 };

 } // namespace juce
--- a/source/modules/juce_audio_devices/audio_io/juce_AudioIODeviceType.cpp
+++ b/source/modules/juce_audio_devices/audio_io/juce_AudioIODeviceType.cpp
@@ -1,81 +0,0 @@
 /*
  ==============================================================================

   This file is part of the JUCE library.
   Copyright (c) 2017 - ROLI Ltd.

   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
 {

 AudioIODeviceType::AudioIODeviceType (const String& name)
    : typeName (name)
 {
 }

 AudioIODeviceType::~AudioIODeviceType()
 {
 }

 //==============================================================================
 void AudioIODeviceType::addListener (Listener* l)      { listeners.add (l); }
 void AudioIODeviceType::removeListener (Listener* l)   { listeners.remove (l); }

 void AudioIODeviceType::callDeviceChangeListeners()
 {
    listeners.call (&AudioIODeviceType::Listener::audioDeviceListChanged);
 }

 //==============================================================================
 #if ! JUCE_MAC
 AudioIODeviceType* AudioIODeviceType::createAudioIODeviceType_CoreAudio()       { return nullptr; }
 #endif

 #if ! JUCE_IOS
 AudioIODeviceType* AudioIODeviceType::createAudioIODeviceType_iOSAudio()        { return nullptr; }
 #endif

 #if ! (JUCE_WINDOWS && JUCE_WASAPI)
 AudioIODeviceType* AudioIODeviceType::createAudioIODeviceType_WASAPI (bool)     { return nullptr; }
 #endif

 #if ! (JUCE_WINDOWS && JUCE_DIRECTSOUND)
 AudioIODeviceType* AudioIODeviceType::createAudioIODeviceType_DirectSound()     { return nullptr; }
 #endif

 #if ! (JUCE_WINDOWS && JUCE_ASIO)
 AudioIODeviceType* AudioIODeviceType::createAudioIODeviceType_ASIO()            { return nullptr; }
 #endif

 #if ! (JUCE_LINUX && JUCE_ALSA)
 AudioIODeviceType* AudioIODeviceType::createAudioIODeviceType_ALSA()            { return nullptr; }
 #endif

 #if ! (JUCE_LINUX && JUCE_JACK)
 AudioIODeviceType* AudioIODeviceType::createAudioIODeviceType_JACK()            { return nullptr; }
 #endif

 #if ! JUCE_ANDROID
 AudioIODeviceType* AudioIODeviceType::createAudioIODeviceType_Android()         { return nullptr; }
 #endif

 #if ! (JUCE_ANDROID && JUCE_USE_ANDROID_OPENSLES)
 AudioIODeviceType* AudioIODeviceType::createAudioIODeviceType_OpenSLES()        { return nullptr; }
 #endif

 } // namespace juce
--- a/source/modules/juce_audio_devices/audio_io/juce_AudioIODeviceType.h
+++ b/source/modules/juce_audio_devices/audio_io/juce_AudioIODeviceType.h
@@ -1,178 +0,0 @@
 /*
  ==============================================================================

   This file is part of the JUCE library.
   Copyright (c) 2017 - ROLI Ltd.

   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
 {

 //==============================================================================
 /**
    Represents a type of audio driver, such as DirectSound, ASIO, CoreAudio, etc.

    To get a list of available audio driver types, use the AudioDeviceManager::createAudioDeviceTypes()
    method. Each of the objects returned can then be used to list the available
    devices of that type. E.g.
    @code
    OwnedArray<AudioIODeviceType> types;
    myAudioDeviceManager.createAudioDeviceTypes (types);

    for (int i = 0; i < types.size(); ++i)
    {
        String typeName (types[i]->getTypeName());  // This will be things like "DirectSound", "CoreAudio", etc.

        types[i]->scanForDevices();                 // This must be called before getting the list of devices

        StringArray deviceNames (types[i]->getDeviceNames());  // This will now return a list of available devices of this type

        for (int j = 0; j < deviceNames.size(); ++j)
        {
            AudioIODevice* device = types[i]->createDevice (deviceNames [j]);

            ...
        }
    }
    @endcode

    For an easier way of managing audio devices and their settings, have a look at the
    AudioDeviceManager class.

    @see AudioIODevice, AudioDeviceManager
 */
 class JUCE_API  AudioIODeviceType
 {
 public:
    //==============================================================================
    /** Returns the name of this type of driver that this object manages.

        This will be something like "DirectSound", "ASIO", "CoreAudio", "ALSA", etc.
    */
    const String& getTypeName() const noexcept                      { return typeName; }

    //==============================================================================
    /** Refreshes the object's cached list of known devices.

        This must be called at least once before calling getDeviceNames() or any of
        the other device creation methods.
    */
    virtual void scanForDevices() = 0;

    /** Returns the list of available devices of this type.

        The scanForDevices() method must have been called to create this list.

        @param wantInputNames     only really used by DirectSound where devices are split up
                                  into inputs and outputs, this indicates whether to use
                                  the input or output name to refer to a pair of devices.
    */
    virtual StringArray getDeviceNames (bool wantInputNames = false) const = 0;

    /** Returns the name of the default device.

        This will be one of the names from the getDeviceNames() list.

        @param forInput     if true, this means that a default input device should be
                            returned; if false, it should return the default output
    */
    virtual int getDefaultDeviceIndex (bool forInput) const = 0;

    /** Returns the index of a given device in the list of device names.
        If asInput is true, it shows the index in the inputs list, otherwise it
        looks for it in the outputs list.
    */
    virtual int getIndexOfDevice (AudioIODevice* device, bool asInput) const = 0;

    /** Returns true if two different devices can be used for the input and output.
    */
    virtual bool hasSeparateInputsAndOutputs() const = 0;

    /** Creates one of the devices of this type.

        The deviceName must be one of the strings returned by getDeviceNames(), and
        scanForDevices() must have been called before this method is used.
    */
    virtual AudioIODevice* createDevice (const String& outputDeviceName,
                                         const String& inputDeviceName) = 0;

    //==============================================================================
    /**
        A class for receiving events when audio devices are inserted or removed.

        You can register an AudioIODeviceType::Listener with an~AudioIODeviceType object
        using the AudioIODeviceType::addListener() method, and it will be called when
        devices of that type are added or removed.

        @see AudioIODeviceType::addListener, AudioIODeviceType::removeListener
    */
    class Listener
    {
    public:
        virtual ~Listener() {}

        /** Called when the list of available audio devices changes. */
        virtual void audioDeviceListChanged() = 0;
    };

    /** Adds a listener that will be called when this type of device is added or
        removed from the system.
    */
    void addListener (Listener* listener);

    /** Removes a listener that was previously added with addListener(). */
    void removeListener (Listener* listener);

    //==============================================================================
    /** Destructor. */
    virtual ~AudioIODeviceType();

    //==============================================================================
    /** Creates a CoreAudio device type if it's available on this platform, or returns null. */
    static AudioIODeviceType* createAudioIODeviceType_CoreAudio();
    /** Creates an iOS device type if it's available on this platform, or returns null. */
    static AudioIODeviceType* createAudioIODeviceType_iOSAudio();
    /** Creates a WASAPI device type if it's available on this platform, or returns null. */
    static AudioIODeviceType* createAudioIODeviceType_WASAPI (bool exclusiveMode);
    /** Creates a DirectSound device type if it's available on this platform, or returns null. */
    static AudioIODeviceType* createAudioIODeviceType_DirectSound();
    /** Creates an ASIO device type if it's available on this platform, or returns null. */
    static AudioIODeviceType* createAudioIODeviceType_ASIO();
    /** Creates an ALSA device type if it's available on this platform, or returns null. */
    static AudioIODeviceType* createAudioIODeviceType_ALSA();
    /** Creates a JACK device type if it's available on this platform, or returns null. */
    static AudioIODeviceType* createAudioIODeviceType_JACK();
    /** Creates an Android device type if it's available on this platform, or returns null. */
    static AudioIODeviceType* createAudioIODeviceType_Android();
    /** Creates an Android OpenSLES device type if it's available on this platform, or returns null. */
    static AudioIODeviceType* createAudioIODeviceType_OpenSLES();

 protected:
    explicit AudioIODeviceType (const String& typeName);

    /** Synchronously calls all the registered device list change listeners. */
    void callDeviceChangeListeners();

 private:
    String typeName;
    ListenerList<Listener> listeners;

    JUCE_DECLARE_NON_COPYABLE (AudioIODeviceType)
 };

 } // namespace juce
--- a/source/modules/juce_audio_devices/audio_io/juce_SystemAudioVolume.h
+++ b/source/modules/juce_audio_devices/audio_io/juce_SystemAudioVolume.h
@@ -1,57 +0,0 @@
 /*
  ==============================================================================

   This file is part of the JUCE library.
   Copyright (c) 2017 - ROLI Ltd.

   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
 {

 //==============================================================================
 /**
    Contains functions to control the system's master volume.
 */
 class JUCE_API  SystemAudioVolume
 {
 public:
    //==============================================================================
    /** Returns the operating system's current volume level in the range 0 to 1.0 */
    static float JUCE_CALLTYPE getGain();

    /** Attempts to set the operating system's current volume level.
        @param newGain  the level, between 0 and 1.0
        @returns true if the operation succeeds
    */
    static bool JUCE_CALLTYPE setGain (float newGain);

    /** Returns true if the system's audio output is currently muted. */
    static bool JUCE_CALLTYPE isMuted();

    /** Attempts to mute the operating system's audio output.
        @param shouldBeMuted    true if you want it to be muted
        @returns true if the operation succeeds
    */
    static bool JUCE_CALLTYPE setMuted (bool shouldBeMuted);

 private:
    SystemAudioVolume(); // Don't instantiate this class, just call its static fns.
    JUCE_DECLARE_NON_COPYABLE (SystemAudioVolume)
 };

 } // namespace juce
--- a/source/modules/juce_audio_devices/juce_audio_devices.cpp
+++ b/source/modules/juce_audio_devices/juce_audio_devices.cpp
@@ -1,225 +0,0 @@
 /*
  ==============================================================================

   This file is part of the JUCE library.
   Copyright (c) 2017 - ROLI Ltd.

   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.

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

 #ifdef JUCE_AUDIO_DEVICES_H_INCLUDED
 /* When you add this cpp file to your project, you mustn't include it in a file where you've
    already included any other headers - just put it inside a file on its own, possibly with your config
    flags preceding it, but don't include anything else. That also includes avoiding any automatic prefix
    header files that the compiler may be using.
 */
 #error "Incorrect use of JUCE cpp file"
 #endif

 #define JUCE_CORE_INCLUDE_OBJC_HELPERS 1
 #define JUCE_CORE_INCLUDE_COM_SMART_PTR 1
 #define JUCE_CORE_INCLUDE_JNI_HELPERS 1
 #define JUCE_CORE_INCLUDE_NATIVE_HEADERS 1
 #define JUCE_EVENTS_INCLUDE_WIN32_MESSAGE_WINDOW 1

 #ifndef JUCE_USE_WINRT_MIDI
 #define JUCE_USE_WINRT_MIDI 0
 #endif

 #if JUCE_USE_WINRT_MIDI
 #define JUCE_EVENTS_INCLUDE_WINRT_WRAPPER 1
 #endif

 #include "juce_audio_devices.h"

 //==============================================================================
 #if JUCE_MAC
 #define Point CarbonDummyPointName
 #define Component CarbonDummyCompName
 #import <CoreAudio/AudioHardware.h>
 #import <CoreMIDI/MIDIServices.h>
 #import <AudioToolbox/AudioServices.h>
 #undef Point
 #undef Component

 #elif JUCE_IOS
 #import <AudioToolbox/AudioToolbox.h>
 #import <AVFoundation/AVFoundation.h>
 #import <CoreMIDI/MIDIServices.h>

 #if TARGET_OS_SIMULATOR
  #import <CoreMIDI/MIDINetworkSession.h>
 #endif

 //==============================================================================
 #elif JUCE_WINDOWS
 #if JUCE_WASAPI
  #include <mmreg.h>
 #endif

 #if JUCE_USE_WINRT_MIDI
  /* If you cannot find any of the header files below then you are probably
     attempting to use the Windows 10 Bluetooth Low Energy API. For this to work you
     need to install version 10.0.14393.0 of the Windows Standalone SDK and add the
     path to the WinRT headers to your build system. This path should have the form
     "C:\Program Files (x86)\Windows Kits\10\Include\10.0.14393.0\winrt".

     Also please note that Microsoft's Bluetooth MIDI stack has multiple issues, so
     this API is EXPERIMENTAL - use at your own risk!
  */
  #include <windows.devices.h>
  #include <windows.devices.midi.h>
  #include <windows.devices.enumeration.h>
  #include <wrl/event.h>
  #if JUCE_MSVC
   #pragma warning (push)
   #pragma warning (disable: 4467)
  #endif
  #include <robuffer.h>
  #if JUCE_MSVC
   #pragma warning (pop)
  #endif
 #endif

 #if JUCE_ASIO
  /* This is very frustrating - we only need to use a handful of definitions from
     a couple of the header files in Steinberg's ASIO SDK, and it'd be easy to copy
     about 30 lines of code into this cpp file to create a fully stand-alone ASIO
     implementation...

     ..unfortunately that would break Steinberg's license agreement for use of
     their SDK, so I'm not allowed to do this.

     This means that anyone who wants to use JUCE's ASIO abilities will have to:

     1) Agree to Steinberg's licensing terms and download the ASIO SDK
         (see http://www.steinberg.net/en/company/developers.html).

     2) Enable this code with a global definition #define JUCE_ASIO 1.

     3) Make sure that your header search path contains the iasiodrv.h file that
        comes with the SDK. (Only about a handful of the SDK header files are actually
        needed - so to simplify things, you could just copy these into your JUCE directory).
  */
  #include <iasiodrv.h>
 #endif

 //==============================================================================
 #elif JUCE_LINUX
 #if JUCE_ALSA
  /* Got an include error here? If so, you've either not got ALSA installed, or you've
     not got your paths set up correctly to find its header files.

     The package you need to install to get ASLA support is "libasound2-dev".

     If you don't have the ALSA library and don't want to build Juce with audio support,
     just set the JUCE_ALSA flag to 0.
  */
  #include <alsa/asoundlib.h>
 #endif

 #if JUCE_JACK
  /* Got an include error here? If so, you've either not got jack-audio-connection-kit
     installed, or you've not got your paths set up correctly to find its header files.

     The package you need to install to get JACK support is "libjack-dev".

     If you don't have the jack-audio-connection-kit library and don't want to build
     Juce with low latency audio support, just set the JUCE_JACK flag to 0.
  */
  #include <jack/jack.h>
 #endif
 #undef SIZEOF

 //==============================================================================
 #elif JUCE_ANDROID

 #if JUCE_USE_ANDROID_OPENSLES
  #include <SLES/OpenSLES.h>
  #include <SLES/OpenSLES_Android.h>
  #include <SLES/OpenSLES_AndroidConfiguration.h>
 #endif

 #endif

 #include "audio_io/juce_AudioDeviceManager.cpp"
 #include "audio_io/juce_AudioIODevice.cpp"
 #include "audio_io/juce_AudioIODeviceType.cpp"
 #include "midi_io/juce_MidiMessageCollector.cpp"
 #include "midi_io/juce_MidiOutput.cpp"
 #include "sources/juce_AudioSourcePlayer.cpp"
 #include "sources/juce_AudioTransportSource.cpp"
 #include "native/juce_MidiDataConcatenator.h"

 //==============================================================================
 #if JUCE_MAC
 #include "native/juce_mac_CoreAudio.cpp"
 #include "native/juce_mac_CoreMidi.cpp"

 //==============================================================================
 #elif JUCE_IOS
 #include "native/juce_ios_Audio.cpp"
 #include "native/juce_mac_CoreMidi.cpp"

 //==============================================================================
 #elif JUCE_WINDOWS

 #if JUCE_WASAPI
  #include "native/juce_win32_WASAPI.cpp"
 #endif

 #if JUCE_DIRECTSOUND
  #include "native/juce_win32_DirectSound.cpp"
 #endif

 #include "native/juce_win32_Midi.cpp"

 #if JUCE_ASIO
  #include "native/juce_win32_ASIO.cpp"
 #endif

 //==============================================================================
 #elif JUCE_LINUX
 #if JUCE_ALSA
  #include "native/juce_linux_ALSA.cpp"
 #endif

 #include "native/juce_linux_Midi.cpp"

 #if JUCE_JACK
  #include "native/juce_linux_JackAudio.cpp"
 #endif

 //==============================================================================
 #elif JUCE_ANDROID
 #include "native/juce_android_Audio.cpp"
 #include "native/juce_android_Midi.cpp"

 #if JUCE_USE_ANDROID_OPENSLES
  #include "native/juce_android_OpenSL.cpp"
 #endif
 #endif

 #if ! JUCE_SYSTEMAUDIOVOL_IMPLEMENTED
 namespace juce
 {
    // None of these methods are available. (On Windows you might need to enable WASAPI for this)
    float JUCE_CALLTYPE SystemAudioVolume::getGain()         { jassertfalse; return 0.0f; }
    bool  JUCE_CALLTYPE SystemAudioVolume::setGain (float)   { jassertfalse; return false; }
    bool  JUCE_CALLTYPE SystemAudioVolume::isMuted()         { jassertfalse; return false; }
    bool  JUCE_CALLTYPE SystemAudioVolume::setMuted (bool)   { jassertfalse; return false; }
 }
 #endif
--- a/source/modules/juce_audio_devices/juce_audio_devices.h
+++ b/source/modules/juce_audio_devices/juce_audio_devices.h
@@ -1,155 +0,0 @@
 /*
  ==============================================================================

   This file is part of the JUCE library.
   Copyright (c) 2017 - ROLI Ltd.

   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.

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

 /*******************************************************************************
 The block below describes the properties of this module, and is read by
 the Projucer to automatically generate project code that uses it.
 For details about the syntax and how to create or use a module, see the
 JUCE Module Format.txt file.


 BEGIN_JUCE_MODULE_DECLARATION

  ID:               juce_audio_devices
  vendor:           juce
  version:          5.1.2
  name:             JUCE audio and MIDI I/O device classes
  description:      Classes to play and record from audio and MIDI I/O devices
  website:          http://www.juce.com/juce
  license:          ISC

  dependencies:     juce_audio_basics, juce_events
  OSXFrameworks:    CoreAudio CoreMIDI AudioToolbox
  iOSFrameworks:    CoreAudio CoreMIDI AudioToolbox AVFoundation
  linuxPackages:    alsa
  mingwLibs:        winmm

 END_JUCE_MODULE_DECLARATION

 *******************************************************************************/


 #pragma once
 #define JUCE_AUDIO_DEVICES_H_INCLUDED

 #include <juce_events/juce_events.h>
 #include <juce_audio_basics/juce_audio_basics.h>

 #if JUCE_MODULE_AVAILABLE_juce_graphics
 #include <juce_graphics/juce_graphics.h>
 #endif

 //==============================================================================
 /** Config: JUCE_ASIO
    Enables ASIO audio devices (MS Windows only).
    Turning this on means that you'll need to have the Steinberg ASIO SDK installed
    on your Windows build machine.

    See the comments in the ASIOAudioIODevice class's header file for more
    info about this.
 */
 #ifndef JUCE_ASIO
 #define JUCE_ASIO 0
 #endif

 /** Config: JUCE_WASAPI
    Enables WASAPI audio devices (Windows Vista and above). See also the
    JUCE_WASAPI_EXCLUSIVE flag.
 */
 #ifndef JUCE_WASAPI
 #define JUCE_WASAPI 1
 #endif

 /** Config: JUCE_WASAPI_EXCLUSIVE
    Enables WASAPI audio devices in exclusive mode (Windows Vista and above).
 */
 #ifndef JUCE_WASAPI_EXCLUSIVE
 #define JUCE_WASAPI_EXCLUSIVE 0
 #endif


 /** Config: JUCE_DIRECTSOUND
    Enables DirectSound audio (MS Windows only).
 */
 #ifndef JUCE_DIRECTSOUND
 #define JUCE_DIRECTSOUND 1
 #endif

 /** Config: JUCE_ALSA
    Enables ALSA audio devices (Linux only).
 */
 #ifndef JUCE_ALSA
 #define JUCE_ALSA 1
 #endif

 /** Config: JUCE_JACK
    Enables JACK audio devices (Linux only).
 */
 #ifndef JUCE_JACK
 #define JUCE_JACK 0
 #endif

 /** Config: JUCE_USE_ANDROID_OPENSLES
    Enables OpenSLES devices (Android only).
 */
 #ifndef JUCE_USE_ANDROID_OPENSLES
 #if JUCE_ANDROID_API_VERSION > 8
  #define JUCE_USE_ANDROID_OPENSLES 1
 #else
  #define JUCE_USE_ANDROID_OPENSLES 0
 #endif
 #endif

 /** Config: JUCE_USE_WINRT_MIDI
    ***
    EXPERIMENTAL - Microsoft's Bluetooth MIDI stack has multiple issues,
    use at your own risk!
    ***

    Enables the use of the Windows Runtime API for MIDI, which supports
    Bluetooth Low Energy connections on computers with the Anniversary Update
    of Windows 10.

    To compile with this flag requires version 10.0.14393.0 of the Windows
    Standalone SDK and you must add the path to the WinRT headers. This path
    should be something similar to
    "C:\Program Files (x86)\Windows Kits\10\Include\10.0.14393.0\winrt".
 */
 #ifndef JUCE_USE_WINRT_MIDI
 #define JUCE_USE_WINRT_MIDI 0
 #endif


 //==============================================================================
 #include "midi_io/juce_MidiInput.h"
 #include "midi_io/juce_MidiMessageCollector.h"
 #include "midi_io/juce_MidiOutput.h"
 #include "audio_io/juce_AudioIODevice.h"
 #include "audio_io/juce_AudioIODeviceType.h"
 #include "audio_io/juce_SystemAudioVolume.h"
 #include "sources/juce_AudioSourcePlayer.h"
 #include "sources/juce_AudioTransportSource.h"
 #include "audio_io/juce_AudioDeviceManager.h"

 #if JUCE_IOS
 #include "native/juce_ios_Audio.h"
 #endif
--- a/source/modules/juce_audio_devices/midi_io/juce_MidiInput.h
+++ b/source/modules/juce_audio_devices/midi_io/juce_MidiInput.h
@@ -1,176 +0,0 @@
 /*
  ==============================================================================

   This file is part of the JUCE library.
   Copyright (c) 2017 - ROLI Ltd.

   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 MidiInput;


 //==============================================================================
 /**
    Receives incoming messages from a physical MIDI input device.

    This class is overridden to handle incoming midi messages. See the MidiInput
    class for more details.

    @see MidiInput
 */
 class JUCE_API  MidiInputCallback
 {
 public:
    /** Destructor. */
    virtual ~MidiInputCallback()  {}


    /** Receives an incoming message.

        A MidiInput object will call this method when a midi event arrives. It'll be
        called on a high-priority system thread, so avoid doing anything time-consuming
        in here, and avoid making any UI calls. You might find the MidiBuffer class helpful
        for queueing incoming messages for use later.

        @param source   the MidiInput object that generated the message
        @param message  the incoming message. The message's timestamp is set to a value
                        equivalent to (Time::getMillisecondCounter() / 1000.0) to specify the
                        time when the message arrived.
    */
    virtual void handleIncomingMidiMessage (MidiInput* source,
                                            const MidiMessage& message) = 0;

    /** Notification sent each time a packet of a multi-packet sysex message arrives.

        If a long sysex message is broken up into multiple packets, this callback is made
        for each packet that arrives until the message is finished, at which point
        the normal handleIncomingMidiMessage() callback will be made with the entire
        message.

        The message passed in will contain the start of a sysex, but won't be finished
        with the terminating 0xf7 byte.
    */
    virtual void handlePartialSysexMessage (MidiInput* source,
                                            const uint8* messageData,
                                            int numBytesSoFar,
                                            double timestamp)
    {
        ignoreUnused (source, messageData, numBytesSoFar, timestamp);
    }
 };

 //==============================================================================
 /**
    Represents a midi input device.

    To create one of these, use the static getDevices() method to find out what inputs are
    available, and then use the openDevice() method to try to open one.

    @see MidiOutput
 */
 class JUCE_API  MidiInput
 {
 public:
    //==============================================================================
    /** Returns a list of the available midi input devices.

        You can open one of the devices by passing its index into the
        openDevice() method.

        @see getDefaultDeviceIndex, openDevice
    */
    static StringArray getDevices();

    /** Returns the index of the default midi input device to use.

        This refers to the index in the list returned by getDevices().
    */
    static int getDefaultDeviceIndex();

    /** Tries to open one of the midi input devices.

        This will return a MidiInput object if it manages to open it. You can then
        call start() and stop() on this device, and delete it when no longer needed.

        If the device can't be opened, this will return a null pointer.

        @param deviceIndex  the index of a device from the list returned by getDevices()
        @param callback     the object that will receive the midi messages from this device.

        @see MidiInputCallback, getDevices
    */
    static MidiInput* openDevice (int deviceIndex,
                                  MidiInputCallback* callback);

   #if JUCE_LINUX || JUCE_MAC || JUCE_IOS || DOXYGEN
    /** This will try to create a new midi input device (Not available on Windows).

        This will attempt to create a new midi input device with the specified name,
        for other apps to connect to.

        Returns nullptr if a device can't be created.

        @param deviceName   the name to use for the new device
        @param callback     the object that will receive the midi messages from this device.
    */
    static MidiInput* createNewDevice (const String& deviceName,
                                       MidiInputCallback* callback);
   #endif

    //==============================================================================
    /** Destructor. */
    ~MidiInput();

    /** Returns the name of this device. */
    const String& getName() const noexcept                      { return name; }

    /** Allows you to set a custom name for the device, in case you don't like the name
        it was given when created.
    */
    void setName (const String& newName) noexcept               { name = newName; }

    //==============================================================================
    /** Starts the device running.

        After calling this, the device will start sending midi messages to the
        MidiInputCallback object that was specified when the openDevice() method
        was called.

        @see stop
    */
    void start();

    /** Stops the device running.
        @see start
    */
    void stop();

 private:
    //==============================================================================
    String name;
    void* internal = nullptr;

    // The input objects are created with the openDevice() method.
    explicit MidiInput (const String&);

    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (MidiInput)
 };

 } // namespace juce
--- a/source/modules/juce_audio_devices/midi_io/juce_MidiMessageCollector.cpp
+++ b/source/modules/juce_audio_devices/midi_io/juce_MidiMessageCollector.cpp
@@ -1,158 +0,0 @@
 /*
  ==============================================================================

   This file is part of the JUCE library.
   Copyright (c) 2017 - ROLI Ltd.

   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
 {

 MidiMessageCollector::MidiMessageCollector()
 {
 }

 MidiMessageCollector::~MidiMessageCollector()
 {
 }

 //==============================================================================
 void MidiMessageCollector::reset (const double newSampleRate)
 {
    jassert (newSampleRate > 0);

    const ScopedLock sl (midiCallbackLock);
   #if JUCE_DEBUG
    hasCalledReset = true;
   #endif
    sampleRate = newSampleRate;
    incomingMessages.clear();
    lastCallbackTime = Time::getMillisecondCounterHiRes();
 }

 void MidiMessageCollector::addMessageToQueue (const MidiMessage& message)
 {
   #if JUCE_DEBUG
    jassert (hasCalledReset); // you need to call reset() to set the correct sample rate before using this object
   #endif

    // the messages that come in here need to be time-stamped correctly - see MidiInput
    // for details of what the number should be.
    jassert (message.getTimeStamp() != 0);

    const ScopedLock sl (midiCallbackLock);

    auto sampleNumber = (int) ((message.getTimeStamp() - 0.001 * lastCallbackTime) * sampleRate);

    incomingMessages.addEvent (message, sampleNumber);

    // if the messages don't get used for over a second, we'd better
    // get rid of any old ones to avoid the queue getting too big
    if (sampleNumber > sampleRate)
        incomingMessages.clear (0, sampleNumber - (int) sampleRate);
 }

 void MidiMessageCollector::removeNextBlockOfMessages (MidiBuffer& destBuffer,
                                                      const int numSamples)
 {
   #if JUCE_DEBUG
    jassert (hasCalledReset); // you need to call reset() to set the correct sample rate before using this object
   #endif

    jassert (numSamples > 0);

    auto timeNow = Time::getMillisecondCounterHiRes();
    auto msElapsed = timeNow - lastCallbackTime;

    const ScopedLock sl (midiCallbackLock);
    lastCallbackTime = timeNow;

    if (! incomingMessages.isEmpty())
    {
        int numSourceSamples = jmax (1, roundToInt (msElapsed * 0.001 * sampleRate));
        int startSample = 0;
        int scale = 1 << 16;

        const uint8* midiData;
        int numBytes, samplePosition;

        MidiBuffer::Iterator iter (incomingMessages);

        if (numSourceSamples > numSamples)
        {
            // if our list of events is longer than the buffer we're being
            // asked for, scale them down to squeeze them all in..
            const int maxBlockLengthToUse = numSamples << 5;

            if (numSourceSamples > maxBlockLengthToUse)
            {
                startSample = numSourceSamples - maxBlockLengthToUse;
                numSourceSamples = maxBlockLengthToUse;
                iter.setNextSamplePosition (startSample);
            }

            scale = (numSamples << 10) / numSourceSamples;

            while (iter.getNextEvent (midiData, numBytes, samplePosition))
            {
                samplePosition = ((samplePosition - startSample) * scale) >> 10;

                destBuffer.addEvent (midiData, numBytes,
                                     jlimit (0, numSamples - 1, samplePosition));
            }
        }
        else
        {
            // if our event list is shorter than the number we need, put them
            // towards the end of the buffer
            startSample = numSamples - numSourceSamples;

            while (iter.getNextEvent (midiData, numBytes, samplePosition))
            {
                destBuffer.addEvent (midiData, numBytes,
                                     jlimit (0, numSamples - 1, samplePosition + startSample));
            }
        }

        incomingMessages.clear();
    }
 }

 //==============================================================================
 void MidiMessageCollector::handleNoteOn (MidiKeyboardState*, int midiChannel, int midiNoteNumber, float velocity)
 {
    MidiMessage m (MidiMessage::noteOn (midiChannel, midiNoteNumber, velocity));
    m.setTimeStamp (Time::getMillisecondCounterHiRes() * 0.001);

    addMessageToQueue (m);
 }

 void MidiMessageCollector::handleNoteOff (MidiKeyboardState*, int midiChannel, int midiNoteNumber, float velocity)
 {
    MidiMessage m (MidiMessage::noteOff (midiChannel, midiNoteNumber, velocity));
    m.setTimeStamp (Time::getMillisecondCounterHiRes() * 0.001);

    addMessageToQueue (m);
 }

 void MidiMessageCollector::handleIncomingMidiMessage (MidiInput*, const MidiMessage& message)
 {
    addMessageToQueue (message);
 }

 } // namespace juce
--- a/source/modules/juce_audio_devices/midi_io/juce_MidiMessageCollector.h
+++ b/source/modules/juce_audio_devices/midi_io/juce_MidiMessageCollector.h
@@ -1,103 +0,0 @@
 /*
  ==============================================================================

   This file is part of the JUCE library.
   Copyright (c) 2017 - ROLI Ltd.

   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
 {

 //==============================================================================
 /**
    Collects incoming realtime MIDI messages and turns them into blocks suitable for
    processing by a block-based audio callback.

    The class can also be used as either a MidiKeyboardStateListener or a MidiInputCallback
    so it can easily use a midi input or keyboard component as its source.

    @see MidiMessage, MidiInput
 */
 class JUCE_API  MidiMessageCollector    : public MidiKeyboardStateListener,
                                          public MidiInputCallback
 {
 public:
    //==============================================================================
    /** Creates a MidiMessageCollector. */
    MidiMessageCollector();

    /** Destructor. */
    ~MidiMessageCollector();

    //==============================================================================
    /** Clears any messages from the queue.

        You need to call this method before starting to use the collector, so that
        it knows the correct sample rate to use.
    */
    void reset (double sampleRate);

    /** Takes an incoming real-time message and adds it to the queue.

        The message's timestamp is taken, and it will be ready for retrieval as part
        of the block returned by the next call to removeNextBlockOfMessages().

        This method is fully thread-safe when overlapping calls are made with
        removeNextBlockOfMessages().
    */
    void addMessageToQueue (const MidiMessage& message);

    /** Removes all the pending messages from the queue as a buffer.

        This will also correct the messages' timestamps to make sure they're in
        the range 0 to numSamples - 1.

        This call should be made regularly by something like an audio processing
        callback, because the time that it happens is used in calculating the
        midi event positions.

        This method is fully thread-safe when overlapping calls are made with
        addMessageToQueue().

        Precondition: numSamples must be greater than 0.
    */
    void removeNextBlockOfMessages (MidiBuffer& destBuffer, int numSamples);


    //==============================================================================
    /** @internal */
    void handleNoteOn (MidiKeyboardState*, int midiChannel, int midiNoteNumber, float velocity) override;
    /** @internal */
    void handleNoteOff (MidiKeyboardState*, int midiChannel, int midiNoteNumber, float velocity) override;
    /** @internal */
    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
--- a/source/modules/juce_audio_devices/midi_io/juce_MidiOutput.cpp
+++ b/source/modules/juce_audio_devices/midi_io/juce_MidiOutput.cpp
@@ -1,176 +0,0 @@
 /*
  ==============================================================================

   This file is part of the JUCE library.
   Copyright (c) 2017 - ROLI Ltd.

   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 MidiOutput::PendingMessage
 {
    PendingMessage (const void* const data, const int len, const double timeStamp)
        : message (data, len, timeStamp)
    {}

    MidiMessage message;
    PendingMessage* next;
 };

 MidiOutput::MidiOutput (const String& midiName)
    : Thread ("midi out"),
      internal (nullptr),
      firstMessage (nullptr),
      name (midiName)
 {
 }

 void MidiOutput::sendBlockOfMessagesNow (const MidiBuffer& buffer)
 {
    MidiBuffer::Iterator i (buffer);
    MidiMessage message;
    int samplePosition; // Note: not actually used, so no need to initialise.

    while (i.getNextEvent (message, samplePosition))
        sendMessageNow (message);
 }

 void MidiOutput::sendBlockOfMessages (const MidiBuffer& buffer,
                                      const double millisecondCounterToStartAt,
                                      double samplesPerSecondForBuffer)
 {
    // You've got to call startBackgroundThread() for this to actually work..
    jassert (isThreadRunning());

    // this needs to be a value in the future - RTFM for this method!
    jassert (millisecondCounterToStartAt > 0);

    const double timeScaleFactor = 1000.0 / samplesPerSecondForBuffer;

    MidiBuffer::Iterator i (buffer);

    const uint8* data;
    int len, time;

    while (i.getNextEvent (data, len, time))
    {
        const double eventTime = millisecondCounterToStartAt + timeScaleFactor * time;

        PendingMessage* const m = new PendingMessage (data, len, eventTime);

        const ScopedLock sl (lock);

        if (firstMessage == nullptr || firstMessage->message.getTimeStamp() > eventTime)
        {
            m->next = firstMessage;
            firstMessage = m;
        }
        else
        {
            PendingMessage* mm = firstMessage;

            while (mm->next != nullptr && mm->next->message.getTimeStamp() <= eventTime)
                mm = mm->next;

            m->next = mm->next;
            mm->next = m;
        }
    }

    notify();
 }

 void MidiOutput::clearAllPendingMessages()
 {
    const ScopedLock sl (lock);

    while (firstMessage != nullptr)
    {
        PendingMessage* const m = firstMessage;
        firstMessage = firstMessage->next;
        delete m;
    }
 }

 void MidiOutput::startBackgroundThread()
 {
    startThread (9);
 }

 void MidiOutput::stopBackgroundThread()
 {
    stopThread (5000);
 }

 void MidiOutput::run()
 {
    while (! threadShouldExit())
    {
        uint32 now = Time::getMillisecondCounter();
        uint32 eventTime = 0;
        uint32 timeToWait = 500;

        PendingMessage* message;

        {
            const ScopedLock sl (lock);
            message = firstMessage;

            if (message != nullptr)
            {
                eventTime = (uint32) roundToInt (message->message.getTimeStamp());

                if (eventTime > now + 20)
                {
                    timeToWait = eventTime - (now + 20);
                    message = nullptr;
                }
                else
                {
                    firstMessage = message->next;
                }
            }
        }

        if (message != nullptr)
        {
            const ScopedPointer<PendingMessage> messageDeleter (message);

            if (eventTime > now)
            {
                Time::waitForMillisecondCounter (eventTime);

                if (threadShouldExit())
                    break;
            }

            if (eventTime > now - 200)
                sendMessageNow (message->message);
        }
        else
        {
            jassert (timeToWait < 1000 * 30);
            wait ((int) timeToWait);
        }
    }

    clearAllPendingMessages();
 }

 } // namespace juce
--- a/source/modules/juce_audio_devices/midi_io/juce_MidiOutput.h
+++ b/source/modules/juce_audio_devices/midi_io/juce_MidiOutput.h
@@ -1,143 +0,0 @@
 /*
  ==============================================================================

   This file is part of the JUCE library.
   Copyright (c) 2017 - ROLI Ltd.

   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
 {

 //==============================================================================
 /**
    Controls a physical MIDI output device.

    To create one of these, use the static getDevices() method to get a list of the
    available output devices, then use the openDevice() method to try to open one.

    @see MidiInput
 */
 class JUCE_API  MidiOutput  : private Thread
 {
 public:
    //==============================================================================
    /** Returns a list of the available midi output devices.

        You can open one of the devices by passing its index into the
        openDevice() method.

        @see getDefaultDeviceIndex, openDevice
    */
    static StringArray getDevices();

    /** Returns the index of the default midi output device to use.

        This refers to the index in the list returned by getDevices().
    */
    static int getDefaultDeviceIndex();

    /** Tries to open one of the midi output devices.

        This will return a MidiOutput object if it manages to open it. You can then
        send messages to this device, and delete it when no longer needed.

        If the device can't be opened, this will return a null pointer.

        @param deviceIndex  the index of a device from the list returned by getDevices()
        @see getDevices
    */
    static MidiOutput* openDevice (int deviceIndex);


   #if JUCE_LINUX || JUCE_MAC || JUCE_IOS || DOXYGEN
    /** This will try to create a new midi output device (Not available on Windows).

        This will attempt to create a new midi output device that other apps can connect
        to and use as their midi input.

        Returns nullptr if a device can't be created.

        @param deviceName   the name to use for the new device
    */
    static MidiOutput* createNewDevice (const String& deviceName);
   #endif

    //==============================================================================
    /** Destructor. */
    ~MidiOutput();

    /** Returns the name of this device. */
    const String& getName() const noexcept                      { return name; }

    /** Sends out a MIDI message immediately. */
    void sendMessageNow (const MidiMessage& message);

    /** Sends out a sequence of MIDI messages immediately. */
    void sendBlockOfMessagesNow (const MidiBuffer& buffer);

    //==============================================================================
    /** This lets you supply a block of messages that will be sent out at some point
        in the future.

        The MidiOutput class has an internal thread that can send out timestamped
        messages - this appends a set of messages to its internal buffer, ready for
        sending.

        This will only work if you've already started the thread with startBackgroundThread().

        A time is specified, at which the block of messages should be sent. This time uses
        the same time base as Time::getMillisecondCounter(), and must be in the future.

        The samplesPerSecondForBuffer parameter indicates the number of samples per second
        used by the MidiBuffer. Each event in a MidiBuffer has a sample position, and the
        samplesPerSecondForBuffer value is needed to convert this sample position to a
        real time.
    */
    void sendBlockOfMessages (const MidiBuffer& buffer,
                              double millisecondCounterToStartAt,
                              double samplesPerSecondForBuffer);

    /** Gets rid of any midi messages that had been added by sendBlockOfMessages(). */
    void clearAllPendingMessages();

    /** Starts up a background thread so that the device can send blocks of data.
        Call this to get the device ready, before using sendBlockOfMessages().
    */
    void startBackgroundThread();

    /** Stops the background thread, and clears any pending midi events.
        @see startBackgroundThread
    */
    void stopBackgroundThread();


 private:
    //==============================================================================
    void* internal = nullptr;
    CriticalSection lock;
    struct PendingMessage;
    PendingMessage* firstMessage;
    String name;

    MidiOutput (const String& midiName); // These objects are created with the openDevice() method.
    void run() override;

    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (MidiOutput)
 };

 } // namespace juce
--- a/source/modules/juce_audio_devices/native/juce_MidiDataConcatenator.h
+++ b/source/modules/juce_audio_devices/native/juce_MidiDataConcatenator.h
@@ -1,191 +0,0 @@
 /*
  ==============================================================================

   This file is part of the JUCE library.
   Copyright (c) 2017 - ROLI Ltd.

   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
 {

 //==============================================================================
 /**
    Helper class that takes chunks of incoming midi bytes, packages them into
    messages, and dispatches them to a midi callback.
 */
 class MidiDataConcatenator
 {
 public:
    //==============================================================================
    MidiDataConcatenator (int initialBufferSize)
        : pendingData ((size_t) initialBufferSize)
    {
    }

    void reset()
    {
        pendingBytes = 0;
        runningStatus = 0;
        pendingDataTime = 0;
    }

    template <typename UserDataType, typename CallbackType>
    void pushMidiData (const void* inputData, int numBytes, double time,
                       UserDataType* input, CallbackType& callback)
    {
        const uint8* d = static_cast<const uint8*> (inputData);

        while (numBytes > 0)
        {
            if (pendingBytes > 0 || d[0] == 0xf0)
            {
                processSysex (d, numBytes, time, input, callback);
                runningStatus = 0;
            }
            else
            {
                int len = 0;
                uint8 data[3];

                while (numBytes > 0)
                {
                    // If there's a realtime message embedded in the middle of
                    // the normal message, handle it now..
                    if (*d >= 0xf8 && *d <= 0xfe)
                    {
                        callback.handleIncomingMidiMessage (input, MidiMessage (*d++, time));
                        --numBytes;
                    }
                    else
                    {
                        if (len == 0 && *d < 0x80 && runningStatus >= 0x80)
                            data[len++] = runningStatus;

                        data[len++] = *d++;
                        --numBytes;

                        const uint8 firstByte = data[0];

                        if (firstByte < 0x80 || firstByte == 0xf7)
                        {
                            len = 0;
                            break;   // ignore this malformed MIDI message..
                        }

                        if (len >= MidiMessage::getMessageLengthFromFirstByte (firstByte))
                            break;
                    }
                }

                if (len > 0)
                {
                    int used = 0;
                    const MidiMessage m (data, len, used, 0, time);

                    if (used <= 0)
                        break; // malformed message..

                    jassert (used == len);
                    callback.handleIncomingMidiMessage (input, m);
                    runningStatus = data[0];
                }
            }
        }
    }

 private:
    template <typename UserDataType, typename CallbackType>
    void processSysex (const uint8*& d, int& numBytes, double time,
                       UserDataType* input, CallbackType& callback)
    {
        if (*d == 0xf0)
        {
            pendingBytes = 0;
            pendingDataTime = time;
        }

        pendingData.ensureSize ((size_t) (pendingBytes + numBytes), false);
        uint8* totalMessage = static_cast<uint8*> (pendingData.getData());
        uint8* dest = totalMessage + pendingBytes;

        do
        {
            if (pendingBytes > 0 && *d >= 0x80)
            {
                if (*d == 0xf7)
                {
                    *dest++ = *d++;
                    ++pendingBytes;
                    --numBytes;
                    break;
                }

                if (*d >= 0xfa || *d == 0xf8)
                {
                    callback.handleIncomingMidiMessage (input, MidiMessage (*d, time));
                    ++d;
                    --numBytes;
                }
                else
                {
                    pendingBytes = 0;
                    int used = 0;
                    const MidiMessage m (d, numBytes, used, 0, time);

                    if (used > 0)
                    {
                        callback.handleIncomingMidiMessage (input, m);
                        numBytes -= used;
                        d += used;
                    }

                    break;
                }
            }
            else
            {
                *dest++ = *d++;
                ++pendingBytes;
                --numBytes;
            }
        }
        while (numBytes > 0);

        if (pendingBytes > 0)
        {
            if (totalMessage [pendingBytes - 1] == 0xf7)
            {
                callback.handleIncomingMidiMessage (input, MidiMessage (totalMessage, pendingBytes, pendingDataTime));
                pendingBytes = 0;
            }
            else
            {
                callback.handlePartialSysexMessage (input, totalMessage, pendingBytes, pendingDataTime);
            }
        }
    }

    MemoryBlock pendingData;
    double pendingDataTime = 0;
    int pendingBytes = 0;
    uint8 runningStatus = 0;

    JUCE_DECLARE_NON_COPYABLE (MidiDataConcatenator)
 };

 } // namespace juce
--- a/source/modules/juce_audio_devices/native/juce_android_Audio.cpp
+++ b/source/modules/juce_audio_devices/native/juce_android_Audio.cpp
@@ -1,497 +0,0 @@
 /*
  ==============================================================================

   This file is part of the JUCE library.
   Copyright (c) 2017 - ROLI Ltd.

   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
 {

 #define JNI_CLASS_MEMBERS(METHOD, STATICMETHOD, FIELD, STATICFIELD) \
 STATICMETHOD (getMinBufferSize,            "getMinBufferSize",             "(III)I") \
 STATICMETHOD (getNativeOutputSampleRate,   "getNativeOutputSampleRate",    "(I)I") \
 METHOD (constructor,   "<init>",   "(IIIIII)V") \
 METHOD (getState,      "getState", "()I") \
 METHOD (play,          "play",     "()V") \
 METHOD (stop,          "stop",     "()V") \
 METHOD (release,       "release",  "()V") \
 METHOD (flush,         "flush",    "()V") \
 METHOD (write,         "write",    "([SII)I") \

 DECLARE_JNI_CLASS (AudioTrack, "android/media/AudioTrack");
 #undef JNI_CLASS_MEMBERS

 //==============================================================================
 #define JNI_CLASS_MEMBERS(METHOD, STATICMETHOD, FIELD, STATICFIELD) \
 STATICMETHOD (getMinBufferSize, "getMinBufferSize", "(III)I") \
 METHOD (constructor,       "<init>",           "(IIIII)V") \
 METHOD (getState,          "getState",         "()I") \
 METHOD (startRecording,    "startRecording",   "()V") \
 METHOD (stop,              "stop",             "()V") \
 METHOD (read,              "read",             "([SII)I") \
 METHOD (release,           "release",          "()V") \

 DECLARE_JNI_CLASS (AudioRecord, "android/media/AudioRecord");
 #undef JNI_CLASS_MEMBERS

 //==============================================================================
 #define JNI_CLASS_MEMBERS(METHOD, STATICMETHOD, FIELD, STATICFIELD) \
 STATICFIELD (SDK_INT, "SDK_INT", "I") \

 DECLARE_JNI_CLASS (AndroidBuildVersion, "android/os/Build$VERSION");
 #undef JNI_CLASS_MEMBERS

 //==============================================================================
 enum
 {
    CHANNEL_OUT_STEREO  = 12,
    CHANNEL_IN_STEREO   = 12,
    CHANNEL_IN_MONO     = 16,
    ENCODING_PCM_16BIT  = 2,
    STREAM_MUSIC        = 3,
    MODE_STREAM         = 1,
    STATE_UNINITIALIZED = 0
 };

 const char* const javaAudioTypeName = "Android Audio";

 //==============================================================================
 class AndroidAudioIODevice  : public AudioIODevice,
                              public Thread
 {
 public:
    //==============================================================================
    AndroidAudioIODevice (const String& deviceName)
        : AudioIODevice (deviceName, javaAudioTypeName),
          Thread ("audio"),
          minBufferSizeOut (0), minBufferSizeIn (0), callback (0), sampleRate (0),
          numClientInputChannels (0), numDeviceInputChannels (0), numDeviceInputChannelsAvailable (2),
          numClientOutputChannels (0), numDeviceOutputChannels (0),
          actualBufferSize (0), isRunning (false),
          inputChannelBuffer (1, 1),
          outputChannelBuffer (1, 1)
    {
        JNIEnv* env = getEnv();
        sampleRate = env->CallStaticIntMethod (AudioTrack, AudioTrack.getNativeOutputSampleRate, MODE_STREAM);

        minBufferSizeOut = (int) env->CallStaticIntMethod (AudioTrack,  AudioTrack.getMinBufferSize,  sampleRate, CHANNEL_OUT_STEREO, ENCODING_PCM_16BIT);
        minBufferSizeIn  = (int) env->CallStaticIntMethod (AudioRecord, AudioRecord.getMinBufferSize, sampleRate, CHANNEL_IN_STEREO,  ENCODING_PCM_16BIT);

        if (minBufferSizeIn <= 0)
        {
            minBufferSizeIn = env->CallStaticIntMethod (AudioRecord, AudioRecord.getMinBufferSize, sampleRate, CHANNEL_IN_MONO, ENCODING_PCM_16BIT);

            if (minBufferSizeIn > 0)
                numDeviceInputChannelsAvailable = 1;
            else
                numDeviceInputChannelsAvailable = 0;
        }

        DBG ("Audio device - min buffers: " << minBufferSizeOut << ", " << minBufferSizeIn << "; "
              << sampleRate << " Hz; input chans: " << numDeviceInputChannelsAvailable);
    }

    ~AndroidAudioIODevice()
    {
        close();
    }

    StringArray getOutputChannelNames() override
    {
        StringArray s;
        s.add ("Left");
        s.add ("Right");
        return s;
    }

    StringArray getInputChannelNames() override
    {
        StringArray s;

        if (numDeviceInputChannelsAvailable == 2)
        {
            s.add ("Left");
            s.add ("Right");
        }
        else if (numDeviceInputChannelsAvailable == 1)
        {
            s.add ("Audio Input");
        }

        return s;
    }

    Array<double> getAvailableSampleRates() override
    {
        Array<double> r;
        r.add ((double) sampleRate);
        return r;
    }

    Array<int> getAvailableBufferSizes() override
    {
        Array<int> b;
        int n = 16;

        for (int i = 0; i < 50; ++i)
        {
            b.add (n);
            n += n < 64 ? 16
                        : (n < 512 ? 32
                                   : (n < 1024 ? 64
                                               : (n < 2048 ? 128 : 256)));
        }

        return b;
    }

    int getDefaultBufferSize() override                 { return 2048; }

    String open (const BigInteger& inputChannels,
                 const BigInteger& outputChannels,
                 double requestedSampleRate,
                 int bufferSize) override
    {
        close();

        if (sampleRate != (int) requestedSampleRate)
            return "Sample rate not allowed";

        lastError.clear();
        int preferredBufferSize = (bufferSize <= 0) ? getDefaultBufferSize() : bufferSize;

        numDeviceInputChannels = 0;
        numDeviceOutputChannels = 0;

        activeOutputChans = outputChannels;
        activeOutputChans.setRange (2, activeOutputChans.getHighestBit(), false);
        numClientOutputChannels = activeOutputChans.countNumberOfSetBits();

        activeInputChans = inputChannels;
        activeInputChans.setRange (2, activeInputChans.getHighestBit(), false);
        numClientInputChannels = activeInputChans.countNumberOfSetBits();

        actualBufferSize = preferredBufferSize;
        inputChannelBuffer.setSize (2, actualBufferSize);
        inputChannelBuffer.clear();
        outputChannelBuffer.setSize (2, actualBufferSize);
        outputChannelBuffer.clear();

        JNIEnv* env = getEnv();

        if (numClientOutputChannels > 0)
        {
            numDeviceOutputChannels = 2;
            outputDevice = GlobalRef (env->NewObject (AudioTrack, AudioTrack.constructor,
                                                      STREAM_MUSIC, sampleRate, CHANNEL_OUT_STEREO, ENCODING_PCM_16BIT,
                                                      (jint) (minBufferSizeOut * numDeviceOutputChannels * static_cast<int> (sizeof (int16))), MODE_STREAM));

            const bool supportsUnderrunCount = (getEnv()->GetStaticIntField (AndroidBuildVersion, AndroidBuildVersion.SDK_INT) >= 24);
            getUnderrunCount = supportsUnderrunCount ? env->GetMethodID (AudioTrack, "getUnderrunCount", "()I") : 0;

            int outputDeviceState = env->CallIntMethod (outputDevice, AudioTrack.getState);
            if (outputDeviceState > 0)
            {
                isRunning = true;
            }
            else
            {
                 // failed to open the device
                outputDevice.clear();
                lastError = "Error opening audio output device: android.media.AudioTrack failed with state = " + String (outputDeviceState);
            }
        }

        if (numClientInputChannels > 0 && numDeviceInputChannelsAvailable > 0)
        {
            if (! RuntimePermissions::isGranted (RuntimePermissions::recordAudio))
            {
                // If you hit this assert, you probably forgot to get RuntimePermissions::recordAudio
                // before trying to open an audio input device. This is not going to work!
                jassertfalse;

                inputDevice.clear();
                lastError = "Error opening audio input device: the app was not granted android.permission.RECORD_AUDIO";
            }
            else
            {
                numDeviceInputChannels = jmin (numClientInputChannels, numDeviceInputChannelsAvailable);
                inputDevice = GlobalRef (env->NewObject (AudioRecord, AudioRecord.constructor,
                                                         0 /* (default audio source) */, sampleRate,
                                                         numDeviceInputChannelsAvailable > 1 ? CHANNEL_IN_STEREO : CHANNEL_IN_MONO,
                                                         ENCODING_PCM_16BIT,
                                                         (jint) (minBufferSizeIn * numDeviceInputChannels * static_cast<int> (sizeof (int16)))));

                int inputDeviceState = env->CallIntMethod (inputDevice, AudioRecord.getState);
                if (inputDeviceState > 0)
                {
                    isRunning = true;
                }
                else
                {
                     // failed to open the device
                    inputDevice.clear();
                    lastError = "Error opening audio input device: android.media.AudioRecord failed with state = " + String (inputDeviceState);
                }
            }
        }

        if (isRunning)
        {
            if (outputDevice != nullptr)
                env->CallVoidMethod (outputDevice, AudioTrack.play);

            if (inputDevice != nullptr)
                env->CallVoidMethod (inputDevice, AudioRecord.startRecording);

            startThread (8);
        }
        else
        {
            closeDevices();
        }

        return lastError;
    }

    void close() override
    {
        if (isRunning)
        {
            stopThread (2000);
            isRunning = false;
            closeDevices();
        }
    }

    int getOutputLatencyInSamples() override             { return (minBufferSizeOut * 3) / 4; }
    int getInputLatencyInSamples() override              { return (minBufferSizeIn * 3) / 4; }
    bool isOpen() override                               { return isRunning; }
    int getCurrentBufferSizeSamples() override           { return actualBufferSize; }
    int getCurrentBitDepth() override                    { return 16; }
    double getCurrentSampleRate() override               { return sampleRate; }
    BigInteger getActiveOutputChannels() const override  { return activeOutputChans; }
    BigInteger getActiveInputChannels() const override   { return activeInputChans; }
    String getLastError() override                       { return lastError; }
    bool isPlaying() override                            { return isRunning && callback != 0; }

    int getXRunCount() const noexcept override
    {
        if (outputDevice != nullptr && getUnderrunCount != 0)
            return getEnv()->CallIntMethod (outputDevice, getUnderrunCount);

        return -1;
    }

    void start (AudioIODeviceCallback* newCallback) override
    {
        if (isRunning && callback != newCallback)
        {
            if (newCallback != nullptr)
                newCallback->audioDeviceAboutToStart (this);

            const ScopedLock sl (callbackLock);
            callback = newCallback;
        }
    }

    void stop() override
    {
        if (isRunning)
        {
            AudioIODeviceCallback* lastCallback;

            {
                const ScopedLock sl (callbackLock);
                lastCallback = callback;
                callback = nullptr;
            }

            if (lastCallback != nullptr)
                lastCallback->audioDeviceStopped();
        }
    }

    void run() override
    {
        JNIEnv* env = getEnv();
        jshortArray audioBuffer = env->NewShortArray (actualBufferSize * jmax (numDeviceOutputChannels, numDeviceInputChannels));

        while (! threadShouldExit())
        {
            if (inputDevice != nullptr)
            {
                jint numRead = env->CallIntMethod (inputDevice, AudioRecord.read, audioBuffer, 0, actualBufferSize * numDeviceInputChannels);

                if (numRead < actualBufferSize * numDeviceInputChannels)
                {
                    DBG ("Audio read under-run! " << numRead);
                }

                jshort* const src = env->GetShortArrayElements (audioBuffer, 0);

                for (int chan = 0; chan < inputChannelBuffer.getNumChannels(); ++chan)
                {
                    AudioData::Pointer <AudioData::Float32, AudioData::NativeEndian, AudioData::NonInterleaved, AudioData::NonConst> d (inputChannelBuffer.getWritePointer (chan));

                    if (chan < numDeviceInputChannels)
                    {
                        AudioData::Pointer <AudioData::Int16, AudioData::NativeEndian, AudioData::Interleaved, AudioData::Const> s (src + chan, numDeviceInputChannels);
                        d.convertSamples (s, actualBufferSize);
                    }
                    else
                    {
                        d.clearSamples (actualBufferSize);
                    }
                }

                env->ReleaseShortArrayElements (audioBuffer, src, 0);
            }

            if (threadShouldExit())
                break;

            {
                const ScopedLock sl (callbackLock);

                if (callback != nullptr)
                {
                    callback->audioDeviceIOCallback (inputChannelBuffer.getArrayOfReadPointers(), numClientInputChannels,
                                                     outputChannelBuffer.getArrayOfWritePointers(), numClientOutputChannels,
                                                     actualBufferSize);
                }
                else
                {
                    outputChannelBuffer.clear();
                }
            }

            if (outputDevice != nullptr)
            {
                if (threadShouldExit())
                    break;

                jshort* const dest = env->GetShortArrayElements (audioBuffer, 0);

                for (int chan = 0; chan < numDeviceOutputChannels; ++chan)
                {
                    AudioData::Pointer <AudioData::Int16, AudioData::NativeEndian, AudioData::Interleaved, AudioData::NonConst> d (dest + chan, numDeviceOutputChannels);

                    const float* const sourceChanData = outputChannelBuffer.getReadPointer (jmin (chan, outputChannelBuffer.getNumChannels() - 1));
                    AudioData::Pointer <AudioData::Float32, AudioData::NativeEndian, AudioData::NonInterleaved, AudioData::Const> s (sourceChanData);
                    d.convertSamples (s, actualBufferSize);
                }

                env->ReleaseShortArrayElements (audioBuffer, dest, 0);
                jint numWritten = env->CallIntMethod (outputDevice, AudioTrack.write, audioBuffer, 0, actualBufferSize * numDeviceOutputChannels);

                if (numWritten < actualBufferSize * numDeviceOutputChannels)
                {
                    DBG ("Audio write underrun! " << numWritten);
                }
            }
        }
    }

    int minBufferSizeOut, minBufferSizeIn;

 private:
    //==============================================================================
    CriticalSection callbackLock;
    AudioIODeviceCallback* callback;
    jint sampleRate;
    int numClientInputChannels, numDeviceInputChannels, numDeviceInputChannelsAvailable;
    int numClientOutputChannels, numDeviceOutputChannels;
    int actualBufferSize;
    bool isRunning;
    String lastError;
    BigInteger activeOutputChans, activeInputChans;
    GlobalRef outputDevice, inputDevice;
    AudioSampleBuffer inputChannelBuffer, outputChannelBuffer;
    jmethodID getUnderrunCount = 0;

    void closeDevices()
    {
        if (outputDevice != nullptr)
        {
            outputDevice.callVoidMethod (AudioTrack.stop);
            outputDevice.callVoidMethod (AudioTrack.release);
            outputDevice.clear();
        }

        if (inputDevice != nullptr)
        {
            inputDevice.callVoidMethod (AudioRecord.stop);
            inputDevice.callVoidMethod (AudioRecord.release);
            inputDevice.clear();
        }
    }

    JUCE_DECLARE_NON_COPYABLE (AndroidAudioIODevice)
 };

 //==============================================================================
 class AndroidAudioIODeviceType  : public AudioIODeviceType
 {
 public:
    AndroidAudioIODeviceType()  : AudioIODeviceType (javaAudioTypeName) {}

    //==============================================================================
    void scanForDevices() {}
    StringArray getDeviceNames (bool) const                             { return StringArray (javaAudioTypeName); }
    int getDefaultDeviceIndex (bool) const                              { return 0; }
    int getIndexOfDevice (AudioIODevice* device, bool) const            { return device != nullptr ? 0 : -1; }
    bool hasSeparateInputsAndOutputs() const                            { return false; }

    AudioIODevice* createDevice (const String& outputDeviceName,
                                 const String& inputDeviceName)
    {
        ScopedPointer<AndroidAudioIODevice> dev;

        if (outputDeviceName.isNotEmpty() || inputDeviceName.isNotEmpty())
        {
            dev = new AndroidAudioIODevice (outputDeviceName.isNotEmpty() ? outputDeviceName
                                                                          : inputDeviceName);

            if (dev->getCurrentSampleRate() <= 0 || dev->getDefaultBufferSize() <= 0)
                dev = nullptr;
        }

        return dev.release();
    }

 private:
    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (AndroidAudioIODeviceType)
 };


 //==============================================================================
 extern bool isOpenSLAvailable();

 AudioIODeviceType* AudioIODeviceType::createAudioIODeviceType_Android()
 {
   #if JUCE_USE_ANDROID_OPENSLES
    if (isOpenSLAvailable())
        return nullptr;
   #endif

    return new AndroidAudioIODeviceType();
 }

 } // namespace juce
--- a/source/modules/juce_audio_devices/native/juce_android_Midi.cpp
+++ b/source/modules/juce_audio_devices/native/juce_android_Midi.cpp
@@ -1,364 +0,0 @@
 /*
  ==============================================================================

   This file is part of the JUCE library.
   Copyright (c) 2017 - ROLI Ltd.

   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
 {

 #define JNI_CLASS_MEMBERS(METHOD, STATICMETHOD, FIELD, STATICFIELD) \
 METHOD (getJuceAndroidMidiInputDevices, "getJuceAndroidMidiInputDevices", "()[Ljava/lang/String;") \
 METHOD (getJuceAndroidMidiOutputDevices, "getJuceAndroidMidiOutputDevices", "()[Ljava/lang/String;") \
 METHOD (openMidiInputPortWithJuceIndex, "openMidiInputPortWithJuceIndex", "(IJ)L" JUCE_ANDROID_ACTIVITY_CLASSPATH "$JuceMidiPort;") \
 METHOD (openMidiOutputPortWithJuceIndex, "openMidiOutputPortWithJuceIndex", "(I)L" JUCE_ANDROID_ACTIVITY_CLASSPATH "$JuceMidiPort;") \
 METHOD (getInputPortNameForJuceIndex, "getInputPortNameForJuceIndex", "(I)Ljava/lang/String;") \
 METHOD (getOutputPortNameForJuceIndex, "getOutputPortNameForJuceIndex", "(I)Ljava/lang/String;")
 DECLARE_JNI_CLASS (MidiDeviceManager, JUCE_ANDROID_ACTIVITY_CLASSPATH "$MidiDeviceManager")
 #undef JNI_CLASS_MEMBERS

 #define JNI_CLASS_MEMBERS(METHOD, STATICMETHOD, FIELD, STATICFIELD) \
 METHOD (start, "start", "()V" )\
 METHOD (stop, "stop", "()V") \
 METHOD (close, "close", "()V") \
 METHOD (sendMidi, "sendMidi", "([BII)V")
 DECLARE_JNI_CLASS (JuceMidiPort, JUCE_ANDROID_ACTIVITY_CLASSPATH "$JuceMidiPort")
 #undef JNI_CLASS_MEMBERS


 //==============================================================================
 class AndroidMidiInput
 {
 public:
    AndroidMidiInput (MidiInput* midiInput, int portIdx,
                      juce::MidiInputCallback* midiInputCallback, jobject deviceManager)
        : juceMidiInput (midiInput),
          callback (midiInputCallback),
          midiConcatenator (2048),
          javaMidiDevice (getEnv()->CallObjectMethod (deviceManager,
                                                      MidiDeviceManager.openMidiInputPortWithJuceIndex,
                                                      (jint) portIdx,
                                                      (jlong) this))
    {
    }

    ~AndroidMidiInput()
    {
        if (jobject d = javaMidiDevice.get())
        {
            getEnv()->CallVoidMethod (d, JuceMidiPort.close);
            javaMidiDevice.clear();
        }
    }

    bool isOpen() const noexcept
    {
        return javaMidiDevice != nullptr;
    }

    void start()
    {
        if (jobject d = javaMidiDevice.get())
            getEnv()->CallVoidMethod (d, JuceMidiPort.start);
    }

    void stop()
    {
        if (jobject d = javaMidiDevice.get())
            getEnv()->CallVoidMethod (d, JuceMidiPort.stop);

        callback = nullptr;
    }

    void receive (jbyteArray byteArray, jlong offset, jint len, jlong timestamp)
    {
        jassert (byteArray != nullptr);
        jbyte* data = getEnv()->GetByteArrayElements (byteArray, nullptr);

        HeapBlock<uint8> buffer (static_cast<size_t> (len));
        std::memcpy (buffer.get(), data + offset, static_cast<size_t> (len));

        midiConcatenator.pushMidiData (buffer.get(),
                                       len, static_cast<double> (timestamp) * 1.0e-9,
                                       juceMidiInput, *callback);

        getEnv()->ReleaseByteArrayElements (byteArray, data, 0);
    }

 private:
    MidiInput* juceMidiInput;
    MidiInputCallback* callback;
    MidiDataConcatenator midiConcatenator;
    GlobalRef javaMidiDevice;
 };

 //==============================================================================
 class AndroidMidiOutput
 {
 public:
    AndroidMidiOutput (jobject midiDevice)
        : javaMidiDevice (midiDevice)
    {
    }

    ~AndroidMidiOutput()
    {
        if (jobject d = javaMidiDevice.get())
        {
            getEnv()->CallVoidMethod (d, JuceMidiPort.close);
            javaMidiDevice.clear();
        }
    }

    void send (jbyteArray byteArray, jint offset, jint len)
    {
        if (jobject d = javaMidiDevice.get())
            getEnv()->CallVoidMethod (d,
                                      JuceMidiPort.sendMidi,
                                      byteArray, offset, len);
    }

 private:
    GlobalRef javaMidiDevice;
 };

 JUCE_JNI_CALLBACK (JUCE_JOIN_MACRO (JUCE_ANDROID_ACTIVITY_CLASSNAME, _00024JuceMidiInputPort), handleReceive,
                   void, (JNIEnv* env, jobject, jlong host, jbyteArray byteArray,
                          jint offset, jint count, jlong timestamp))
 {
    // Java may create a Midi thread which JUCE doesn't know about and this callback may be
    // received on this thread. Java will have already created a JNI Env for this new thread,
    // which we need to tell Juce about
    setEnv (env);

    reinterpret_cast<AndroidMidiInput*> (host)->receive (byteArray, offset, count, timestamp);
 }

 //==============================================================================
 class AndroidMidiDeviceManager
 {
 public:
    AndroidMidiDeviceManager()
        : deviceManager (android.activity.callObjectMethod (JuceAppActivity.getAndroidMidiDeviceManager))
    {
    }

    String getInputPortNameForJuceIndex (int idx)
    {
        if (jobject dm = deviceManager.get())
        {
            LocalRef<jstring> string ((jstring) getEnv()->CallObjectMethod (dm, MidiDeviceManager.getInputPortNameForJuceIndex, idx));
            return juceString (string);
        }

        return {};
    }

    String getOutputPortNameForJuceIndex (int idx)
    {
        if (jobject dm = deviceManager.get())
        {
            LocalRef<jstring> string ((jstring) getEnv()->CallObjectMethod (dm, MidiDeviceManager.getOutputPortNameForJuceIndex, idx));
            return juceString (string);
        }

        return {};
    }

    StringArray getDevices (bool input)
    {
        if (jobject dm = deviceManager.get())
        {
            jobjectArray jDevices
                = (jobjectArray) getEnv()->CallObjectMethod (dm, input ? MidiDeviceManager.getJuceAndroidMidiInputDevices
                                                                  : MidiDeviceManager.getJuceAndroidMidiOutputDevices);

            // Create a local reference as converting this
            // to a JUCE string will call into JNI
            LocalRef<jobjectArray> devices (jDevices);
            return javaStringArrayToJuce (devices);
        }

        return {};
    }

    AndroidMidiInput* openMidiInputPortWithIndex (int idx, MidiInput* juceMidiInput, juce::MidiInputCallback* callback)
    {
        if (jobject dm = deviceManager.get())
        {
            ScopedPointer<AndroidMidiInput> androidMidiInput (new AndroidMidiInput (juceMidiInput, idx, callback, dm));

            if (androidMidiInput->isOpen())
                return androidMidiInput.release();
        }

        return nullptr;
    }

    AndroidMidiOutput* openMidiOutputPortWithIndex (int idx)
    {
        if (jobject dm = deviceManager.get())
            if (jobject javaMidiPort = getEnv()->CallObjectMethod (dm, MidiDeviceManager.openMidiOutputPortWithJuceIndex, (jint) idx))
                return new AndroidMidiOutput (javaMidiPort);

        return nullptr;
    }

 private:
    static StringArray javaStringArrayToJuce (jobjectArray jStrings)
    {
        StringArray retval;

        JNIEnv* env = getEnv();
        const int count = env->GetArrayLength (jStrings);

        for (int i = 0; i < count; ++i)
        {
            LocalRef<jstring> string ((jstring) env->GetObjectArrayElement (jStrings, i));
            retval.add (juceString (string));
        }

        return retval;
    }

    GlobalRef deviceManager;
 };

 //==============================================================================
 StringArray MidiOutput::getDevices()
 {
    AndroidMidiDeviceManager manager;
    return manager.getDevices (false);
 }

 int MidiOutput::getDefaultDeviceIndex()
 {
    return 0;
 }

 MidiOutput* MidiOutput::openDevice (int index)
 {
    if (index < 0)
        return nullptr;

    AndroidMidiDeviceManager manager;

    String midiOutputName = manager.getOutputPortNameForJuceIndex (index);

    if (midiOutputName.isEmpty())
    {
        // you supplied an invalid device index!
        jassertfalse;
        return nullptr;
    }

    if (AndroidMidiOutput* midiOutput = manager.openMidiOutputPortWithIndex (index))
    {
        MidiOutput* retval = new MidiOutput (midiOutputName);
        retval->internal = midiOutput;

        return retval;
    }

    return nullptr;
 }

 MidiOutput::~MidiOutput()
 {
    stopBackgroundThread();

    delete reinterpret_cast<AndroidMidiOutput*> (internal);
 }

 void MidiOutput::sendMessageNow (const MidiMessage& message)
 {
    if (AndroidMidiOutput* androidMidi = reinterpret_cast<AndroidMidiOutput*>(internal))
    {
        JNIEnv* env = getEnv();
        const int messageSize = message.getRawDataSize();

        LocalRef<jbyteArray> messageContent = LocalRef<jbyteArray> (env->NewByteArray (messageSize));
        jbyteArray content = messageContent.get();

        jbyte* rawBytes = env->GetByteArrayElements (content, nullptr);
        std::memcpy (rawBytes, message.getRawData(), static_cast<size_t> (messageSize));
        env->ReleaseByteArrayElements (content, rawBytes, 0);

        androidMidi->send (content, (jint) 0, (jint) messageSize);
    }
 }

 //==============================================================================
 MidiInput::MidiInput (const String& nm)  : name (nm)
 {
 }

 StringArray MidiInput::getDevices()
 {
    AndroidMidiDeviceManager manager;
    return manager.getDevices (true);
 }

 int MidiInput::getDefaultDeviceIndex()
 {
    return 0;
 }

 MidiInput* MidiInput::openDevice (int index, juce::MidiInputCallback* callback)
 {
    if (index < 0)
        return nullptr;

    AndroidMidiDeviceManager manager;

    String midiInputName = manager.getInputPortNameForJuceIndex (index);

    if (midiInputName.isEmpty())
    {
        // you supplied an invalid device index!
        jassertfalse;
        return nullptr;
    }

    ScopedPointer<MidiInput> midiInput (new MidiInput (midiInputName));

    midiInput->internal = manager.openMidiInputPortWithIndex (index, midiInput, callback);

    return midiInput->internal != nullptr ? midiInput.release()
                                          : nullptr;
 }

 void MidiInput::start()
 {
    if (AndroidMidiInput* mi = reinterpret_cast<AndroidMidiInput*> (internal))
        mi->start();
 }

 void MidiInput::stop()
 {
    if (AndroidMidiInput* mi = reinterpret_cast<AndroidMidiInput*> (internal))
        mi->stop();
 }

 MidiInput::~MidiInput()
 {
    delete reinterpret_cast<AndroidMidiInput*> (internal);
 }

 } // namespace juce
--- a/source/modules/juce_audio_devices/native/juce_android_OpenSL.cpp
+++ b/source/modules/juce_audio_devices/native/juce_android_OpenSL.cpp
--- a/source/modules/juce_audio_devices/native/juce_ios_Audio.cpp
+++ b/source/modules/juce_audio_devices/native/juce_ios_Audio.cpp
--- a/source/modules/juce_audio_devices/native/juce_ios_Audio.h
+++ b/source/modules/juce_audio_devices/native/juce_ios_Audio.h
@@ -1,93 +0,0 @@
 /*
  ==============================================================================

   This file is part of the JUCE library.
   Copyright (c) 2017 - ROLI Ltd.

   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 iOSAudioIODeviceType;

 class iOSAudioIODevice : public AudioIODevice
 {
 public:
    //==============================================================================
    String open (const BigInteger&, const BigInteger&, double, int) override;
    void close() override;

    void start (AudioIODeviceCallback*) override;
    void stop() override;

    Array<double> getAvailableSampleRates() override;
    Array<int> getAvailableBufferSizes() override;

    bool setAudioPreprocessingEnabled (bool) override;

    //==============================================================================
    bool isPlaying() override;
    bool isOpen() override;
    String getLastError() override;

    //==============================================================================
    StringArray getOutputChannelNames() override;
    StringArray getInputChannelNames() override;

    int getDefaultBufferSize() override;
    int getCurrentBufferSizeSamples() override;

    double getCurrentSampleRate() override;

    int getCurrentBitDepth() override;

    BigInteger getActiveOutputChannels() const override;
    BigInteger getActiveInputChannels() const override;

    int getOutputLatencyInSamples() override;
    int getInputLatencyInSamples() override;

    int getXRunCount() const noexcept override;

    //==============================================================================
    void setMidiMessageCollector (MidiMessageCollector*);
    AudioPlayHead* getAudioPlayHead() const;

    //==============================================================================
    bool isInterAppAudioConnected() const;
   #if JUCE_MODULE_AVAILABLE_juce_graphics
    Image getIcon (int size);
   #endif
    void switchApplication();

 private:
    //==============================================================================
    iOSAudioIODevice (const String&);

    //==============================================================================
    friend struct iOSAudioIODeviceType;
    friend struct AudioSessionHolder;

    struct Pimpl;
    friend struct Pimpl;
    ScopedPointer<Pimpl> pimpl;

    JUCE_DECLARE_NON_COPYABLE (iOSAudioIODevice)
 };

 } // namespace juce
--- a/source/modules/juce_audio_devices/native/juce_linux_ALSA.cpp
+++ b/source/modules/juce_audio_devices/native/juce_linux_ALSA.cpp
--- a/source/modules/juce_audio_devices/native/juce_linux_JackAudio.cpp
+++ b/source/modules/juce_audio_devices/native/juce_linux_JackAudio.cpp
@@ -1,624 +0,0 @@
 /*
  ==============================================================================

   This file is part of the JUCE library.
   Copyright (c) 2017 - ROLI Ltd.

   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
 {

 static void* juce_libjackHandle = nullptr;

 static void* juce_loadJackFunction (const char* const name)
 {
    if (juce_libjackHandle == nullptr)
        return nullptr;

    return dlsym (juce_libjackHandle, name);
 }

 #define JUCE_DECL_JACK_FUNCTION(return_type, fn_name, argument_types, arguments)  \
  return_type fn_name argument_types                                              \
  {                                                                               \
      typedef return_type (*fn_type) argument_types;                              \
      static fn_type fn = (fn_type) juce_loadJackFunction (#fn_name);             \
      return (fn != nullptr) ? ((*fn) arguments) : (return_type) 0;               \
  }

 #define JUCE_DECL_VOID_JACK_FUNCTION(fn_name, argument_types, arguments)          \
  void fn_name argument_types                                                     \
  {                                                                               \
      typedef void (*fn_type) argument_types;                                     \
      static fn_type fn = (fn_type) juce_loadJackFunction (#fn_name);             \
      if (fn != nullptr) (*fn) arguments;                                         \
  }

 //==============================================================================
 JUCE_DECL_JACK_FUNCTION (jack_client_t*, jack_client_open, (const char* client_name, jack_options_t options, jack_status_t* status, ...), (client_name, options, status));
 JUCE_DECL_JACK_FUNCTION (int, jack_client_close, (jack_client_t *client), (client));
 JUCE_DECL_JACK_FUNCTION (int, jack_activate, (jack_client_t* client), (client));
 JUCE_DECL_JACK_FUNCTION (int, jack_deactivate, (jack_client_t* client), (client));
 JUCE_DECL_JACK_FUNCTION (jack_nframes_t, jack_get_buffer_size, (jack_client_t* client), (client));
 JUCE_DECL_JACK_FUNCTION (jack_nframes_t, jack_get_sample_rate, (jack_client_t* client), (client));
 JUCE_DECL_VOID_JACK_FUNCTION (jack_on_shutdown, (jack_client_t* client, void (*function)(void* arg), void* arg), (client, function, arg));
 JUCE_DECL_JACK_FUNCTION (void* , jack_port_get_buffer, (jack_port_t* port, jack_nframes_t nframes), (port, nframes));
 JUCE_DECL_JACK_FUNCTION (jack_nframes_t, jack_port_get_total_latency, (jack_client_t* client, jack_port_t* port), (client, port));
 JUCE_DECL_JACK_FUNCTION (jack_port_t* , jack_port_register, (jack_client_t* client, const char* port_name, const char* port_type, unsigned long flags, unsigned long buffer_size), (client, port_name, port_type, flags, buffer_size));
 JUCE_DECL_VOID_JACK_FUNCTION (jack_set_error_function, (void (*func)(const char*)), (func));
 JUCE_DECL_JACK_FUNCTION (int, jack_set_process_callback, (jack_client_t* client, JackProcessCallback process_callback, void* arg), (client, process_callback, arg));
 JUCE_DECL_JACK_FUNCTION (const char**, jack_get_ports, (jack_client_t* client, const char* port_name_pattern, const char* type_name_pattern, unsigned long flags), (client, port_name_pattern, type_name_pattern, flags));
 JUCE_DECL_JACK_FUNCTION (int, jack_connect, (jack_client_t* client, const char* source_port, const char* destination_port), (client, source_port, destination_port));
 JUCE_DECL_JACK_FUNCTION (const char*, jack_port_name, (const jack_port_t* port), (port));
 JUCE_DECL_JACK_FUNCTION (void*, jack_set_port_connect_callback, (jack_client_t* client, JackPortConnectCallback connect_callback, void* arg), (client, connect_callback, arg));
 JUCE_DECL_JACK_FUNCTION (jack_port_t* , jack_port_by_id, (jack_client_t* client, jack_port_id_t port_id), (client, port_id));
 JUCE_DECL_JACK_FUNCTION (int, jack_port_connected, (const jack_port_t* port), (port));
 JUCE_DECL_JACK_FUNCTION (int, jack_port_connected_to, (const jack_port_t* port, const char* port_name), (port, port_name));
 JUCE_DECL_JACK_FUNCTION (int, jack_set_xrun_callback, (jack_client_t* client, JackXRunCallback xrun_callback, void* arg), (client, xrun_callback, arg));

 #if JUCE_DEBUG
 #define JACK_LOGGING_ENABLED 1
 #endif

 #if JACK_LOGGING_ENABLED
 namespace
 {
    void jack_Log (const String& s)
    {
        std::cerr << s << std::endl;
    }

    const char* getJackErrorMessage (const jack_status_t status)
    {
        if (status & JackServerFailed
             || status & JackServerError)   return "Unable to connect to JACK server";
        if (status & JackVersionError)      return "Client's protocol version does not match";
        if (status & JackInvalidOption)     return "The operation contained an invalid or unsupported option";
        if (status & JackNameNotUnique)     return "The desired client name was not unique";
        if (status & JackNoSuchClient)      return "Requested client does not exist";
        if (status & JackInitFailure)       return "Unable to initialize client";
        return nullptr;
    }
 }
 #define JUCE_JACK_LOG_STATUS(x)    { if (const char* m = getJackErrorMessage (x)) jack_Log (m); }
 #define JUCE_JACK_LOG(x)           jack_Log(x)
 #else
 #define JUCE_JACK_LOG_STATUS(x)    {}
 #define JUCE_JACK_LOG(x)           {}
 #endif


 //==============================================================================
 #ifndef JUCE_JACK_CLIENT_NAME
 #define JUCE_JACK_CLIENT_NAME "JUCEJack"
 #endif

 struct JackPortIterator
 {
    JackPortIterator (jack_client_t* const client, const bool forInput)
        : ports (nullptr), index (-1)
    {
        if (client != nullptr)
            ports = juce::jack_get_ports (client, nullptr, nullptr,
                                          forInput ? JackPortIsOutput : JackPortIsInput);
                                            // (NB: This looks like it's the wrong way round, but it is correct!)
    }

    ~JackPortIterator()
    {
        ::free (ports);
    }

    bool next()
    {
        if (ports == nullptr || ports [index + 1] == nullptr)
            return false;

        name = CharPointer_UTF8 (ports[++index]);
        clientName = name.upToFirstOccurrenceOf (":", false, false);
        return true;
    }

    const char** ports;
    int index;
    String name;
    String clientName;
 };

 class JackAudioIODeviceType;
 static Array<JackAudioIODeviceType*> activeDeviceTypes;

 //==============================================================================
 class JackAudioIODevice   : public AudioIODevice
 {
 public:
    JackAudioIODevice (const String& deviceName,
                       const String& inId,
                       const String& outId)
        : AudioIODevice (deviceName, "JACK"),
          inputId (inId),
          outputId (outId),
          deviceIsOpen (false),
          callback (nullptr),
          totalNumberOfInputChannels (0),
          totalNumberOfOutputChannels (0)
    {
        jassert (deviceName.isNotEmpty());

        jack_status_t status;
        client = juce::jack_client_open (JUCE_JACK_CLIENT_NAME, JackNoStartServer, &status);

        if (client == nullptr)
        {
            JUCE_JACK_LOG_STATUS (status);
        }
        else
        {
            juce::jack_set_error_function (errorCallback);

            // open input ports
            const StringArray inputChannels (getInputChannelNames());
            for (int i = 0; i < inputChannels.size(); ++i)
            {
                String inputName;
                inputName << "in_" << ++totalNumberOfInputChannels;

                inputPorts.add (juce::jack_port_register (client, inputName.toUTF8(),
                                                          JACK_DEFAULT_AUDIO_TYPE, JackPortIsInput, 0));
            }

            // open output ports
            const StringArray outputChannels (getOutputChannelNames());
            for (int i = 0; i < outputChannels.size(); ++i)
            {
                String outputName;
                outputName << "out_" << ++totalNumberOfOutputChannels;

                outputPorts.add (juce::jack_port_register (client, outputName.toUTF8(),
                                                           JACK_DEFAULT_AUDIO_TYPE, JackPortIsOutput, 0));
            }

            inChans.calloc (totalNumberOfInputChannels + 2);
            outChans.calloc (totalNumberOfOutputChannels + 2);
        }
    }

    ~JackAudioIODevice()
    {
        close();
        if (client != nullptr)
        {
            juce::jack_client_close (client);
            client = nullptr;
        }
    }

    StringArray getChannelNames (bool forInput) const
    {
        StringArray names;

        for (JackPortIterator i (client, forInput); i.next();)
            if (i.clientName == getName())
                names.add (i.name.fromFirstOccurrenceOf (":", false, false));

        return names;
    }

    StringArray getOutputChannelNames() override         { return getChannelNames (false); }
    StringArray getInputChannelNames() override          { return getChannelNames (true); }

    Array<double> getAvailableSampleRates() override
    {
        Array<double> rates;

        if (client != nullptr)
            rates.add (juce::jack_get_sample_rate (client));

        return rates;
    }

    Array<int> getAvailableBufferSizes() override
    {
        Array<int> sizes;

        if (client != nullptr)
            sizes.add (juce::jack_get_buffer_size (client));

        return sizes;
    }

    int getDefaultBufferSize() override             { return getCurrentBufferSizeSamples(); }
    int getCurrentBufferSizeSamples() override      { return client != nullptr ? juce::jack_get_buffer_size (client) : 0; }
    double getCurrentSampleRate() override          { return client != nullptr ? juce::jack_get_sample_rate (client) : 0; }


    String open (const BigInteger& inputChannels, const BigInteger& outputChannels,
                 double /* sampleRate */, int /* bufferSizeSamples */) override
    {
        if (client == nullptr)
        {
            lastError = "No JACK client running";
            return lastError;
        }

        lastError.clear();
        close();

        xruns = 0;
        juce::jack_set_process_callback (client, processCallback, this);
        juce::jack_set_port_connect_callback (client, portConnectCallback, this);
        juce::jack_on_shutdown (client, shutdownCallback, this);
        juce::jack_set_xrun_callback (client, xrunCallback, this);
        juce::jack_activate (client);
        deviceIsOpen = true;

        if (! inputChannels.isZero())
        {
            for (JackPortIterator i (client, true); i.next();)
            {
                if (inputChannels [i.index] && i.clientName == getName())
                {
                    int error = juce::jack_connect (client, i.ports[i.index], juce::jack_port_name ((jack_port_t*) inputPorts[i.index]));
                    if (error != 0)
                        JUCE_JACK_LOG ("Cannot connect input port " + String (i.index) + " (" + i.name + "), error " + String (error));
                }
            }
        }

        if (! outputChannels.isZero())
        {
            for (JackPortIterator i (client, false); i.next();)
            {
                if (outputChannels [i.index] && i.clientName == getName())
                {
                    int error = juce::jack_connect (client, juce::jack_port_name ((jack_port_t*) outputPorts[i.index]), i.ports[i.index]);
                    if (error != 0)
                        JUCE_JACK_LOG ("Cannot connect output port " + String (i.index) + " (" + i.name + "), error " + String (error));
                }
            }
        }

        updateActivePorts();

        return lastError;
    }

    void close() override
    {
        stop();

        if (client != nullptr)
        {
            juce::jack_deactivate (client);

            juce::jack_set_xrun_callback (client, xrunCallback, nullptr);
            juce::jack_set_process_callback (client, processCallback, nullptr);
            juce::jack_set_port_connect_callback (client, portConnectCallback, nullptr);
            juce::jack_on_shutdown (client, shutdownCallback, nullptr);
        }

        deviceIsOpen = false;
    }

    void start (AudioIODeviceCallback* newCallback) override
    {
        if (deviceIsOpen && newCallback != callback)
        {
            if (newCallback != nullptr)
                newCallback->audioDeviceAboutToStart (this);

            AudioIODeviceCallback* const oldCallback = callback;

            {
                const ScopedLock sl (callbackLock);
                callback = newCallback;
            }

            if (oldCallback != nullptr)
                oldCallback->audioDeviceStopped();
        }
    }

    void stop() override
    {
        start (nullptr);
    }

    bool isOpen() override                           { return deviceIsOpen; }
    bool isPlaying() override                        { return callback != nullptr; }
    int getCurrentBitDepth() override                { return 32; }
    String getLastError() override                   { return lastError; }
    int getXRunCount() const noexcept override       { return xruns; }

    BigInteger getActiveOutputChannels() const override  { return activeOutputChannels; }
    BigInteger getActiveInputChannels()  const override  { return activeInputChannels;  }

    int getOutputLatencyInSamples() override
    {
        int latency = 0;

        for (int i = 0; i < outputPorts.size(); i++)
            latency = jmax (latency, (int) juce::jack_port_get_total_latency (client, (jack_port_t*) outputPorts [i]));

        return latency;
    }

    int getInputLatencyInSamples() override
    {
        int latency = 0;

        for (int i = 0; i < inputPorts.size(); i++)
            latency = jmax (latency, (int) juce::jack_port_get_total_latency (client, (jack_port_t*) inputPorts [i]));

        return latency;
    }

    String inputId, outputId;

 private:
    void process (const int numSamples)
    {
        int numActiveInChans = 0, numActiveOutChans = 0;

        for (int i = 0; i < totalNumberOfInputChannels; ++i)
        {
            if (activeInputChannels[i])
                if (jack_default_audio_sample_t* in
                        = (jack_default_audio_sample_t*) juce::jack_port_get_buffer ((jack_port_t*) inputPorts.getUnchecked(i), numSamples))
                    inChans [numActiveInChans++] = (float*) in;
        }

        for (int i = 0; i < totalNumberOfOutputChannels; ++i)
        {
            if (activeOutputChannels[i])
                if (jack_default_audio_sample_t* out
                        = (jack_default_audio_sample_t*) juce::jack_port_get_buffer ((jack_port_t*) outputPorts.getUnchecked(i), numSamples))
                    outChans [numActiveOutChans++] = (float*) out;
        }

        const ScopedLock sl (callbackLock);

        if (callback != nullptr)
        {
            if ((numActiveInChans + numActiveOutChans) > 0)
                callback->audioDeviceIOCallback (const_cast<const float**> (inChans.getData()), numActiveInChans,
                                                 outChans, numActiveOutChans, numSamples);
        }
        else
        {
            for (int i = 0; i < numActiveOutChans; ++i)
                zeromem (outChans[i], sizeof (float) * numSamples);
        }
    }

    static int processCallback (jack_nframes_t nframes, void* callbackArgument)
    {
        if (callbackArgument != nullptr)
            ((JackAudioIODevice*) callbackArgument)->process (nframes);

        return 0;
    }

    static int xrunCallback (void* callbackArgument)
    {
        if (callbackArgument != nullptr)
            ((JackAudioIODevice*) callbackArgument)->xruns++;

        return 0;
    }

    void updateActivePorts()
    {
        BigInteger newOutputChannels, newInputChannels;

        for (int i = 0; i < outputPorts.size(); ++i)
            if (juce::jack_port_connected ((jack_port_t*) outputPorts.getUnchecked(i)))
                newOutputChannels.setBit (i);

        for (int i = 0; i < inputPorts.size(); ++i)
            if (juce::jack_port_connected ((jack_port_t*) inputPorts.getUnchecked(i)))
                newInputChannels.setBit (i);

        if (newOutputChannels != activeOutputChannels
             || newInputChannels != activeInputChannels)
        {
            AudioIODeviceCallback* const oldCallback = callback;

            stop();

            activeOutputChannels = newOutputChannels;
            activeInputChannels  = newInputChannels;

            if (oldCallback != nullptr)
                start (oldCallback);

            sendDeviceChangedCallback();
        }
    }

    static void portConnectCallback (jack_port_id_t, jack_port_id_t, int, void* arg)
    {
        if (JackAudioIODevice* device = static_cast<JackAudioIODevice*> (arg))
            device->updateActivePorts();
    }

    static void threadInitCallback (void* /* callbackArgument */)
    {
        JUCE_JACK_LOG ("JackAudioIODevice::initialise");
    }

    static void shutdownCallback (void* callbackArgument)
    {
        JUCE_JACK_LOG ("JackAudioIODevice::shutdown");

        if (JackAudioIODevice* device = (JackAudioIODevice*) callbackArgument)
        {
            device->client = nullptr;
            device->close();
        }
    }

    static void errorCallback (const char* msg)
    {
        JUCE_JACK_LOG ("JackAudioIODevice::errorCallback " + String (msg));
    }

    static void sendDeviceChangedCallback();

    bool deviceIsOpen;
    jack_client_t* client;
    String lastError;
    AudioIODeviceCallback* callback;
    CriticalSection callbackLock;

    HeapBlock<float*> inChans, outChans;
    int totalNumberOfInputChannels;
    int totalNumberOfOutputChannels;
    Array<void*> inputPorts, outputPorts;
    BigInteger activeInputChannels, activeOutputChannels;

    int xruns;
 };


 //==============================================================================
 class JackAudioIODeviceType  : public AudioIODeviceType
 {
 public:
    JackAudioIODeviceType()
        : AudioIODeviceType ("JACK"),
          hasScanned (false)
    {
        activeDeviceTypes.add (this);
    }

    ~JackAudioIODeviceType()
    {
        activeDeviceTypes.removeFirstMatchingValue (this);
    }

    void scanForDevices()
    {
        hasScanned = true;
        inputNames.clear();
        inputIds.clear();
        outputNames.clear();
        outputIds.clear();

        if (juce_libjackHandle == nullptr)  juce_libjackHandle = dlopen ("libjack.so.0", RTLD_LAZY);
        if (juce_libjackHandle == nullptr)  juce_libjackHandle = dlopen ("libjack.so",   RTLD_LAZY);
        if (juce_libjackHandle == nullptr)  return;

        jack_status_t status;

        // open a dummy client
        if (jack_client_t* const client = juce::jack_client_open ("JuceJackDummy", JackNoStartServer, &status))
        {
            // scan for output devices
            for (JackPortIterator i (client, false); i.next();)
            {
                if (i.clientName != (JUCE_JACK_CLIENT_NAME) && ! inputNames.contains (i.clientName))
                {
                    inputNames.add (i.clientName);
                    inputIds.add (i.ports [i.index]);
                }
            }

            // scan for input devices
            for (JackPortIterator i (client, true); i.next();)
            {
                if (i.clientName != (JUCE_JACK_CLIENT_NAME) && ! outputNames.contains (i.clientName))
                {
                    outputNames.add (i.clientName);
                    outputIds.add (i.ports [i.index]);
                }
            }

            juce::jack_client_close (client);
        }
        else
        {
            JUCE_JACK_LOG_STATUS (status);
        }
    }

    StringArray getDeviceNames (bool wantInputNames) const
    {
        jassert (hasScanned); // need to call scanForDevices() before doing this
        return wantInputNames ? inputNames : outputNames;
    }

    int getDefaultDeviceIndex (bool /* forInput */) const
    {
        jassert (hasScanned); // need to call scanForDevices() before doing this
        return 0;
    }

    bool hasSeparateInputsAndOutputs() const    { return true; }

    int getIndexOfDevice (AudioIODevice* device, bool asInput) const
    {
        jassert (hasScanned); // need to call scanForDevices() before doing this

        if (JackAudioIODevice* d = dynamic_cast<JackAudioIODevice*> (device))
            return asInput ? inputIds.indexOf (d->inputId)
                           : outputIds.indexOf (d->outputId);

        return -1;
    }

    AudioIODevice* createDevice (const String& outputDeviceName,
                                 const String& inputDeviceName)
    {
        jassert (hasScanned); // need to call scanForDevices() before doing this

        const int inputIndex = inputNames.indexOf (inputDeviceName);
        const int outputIndex = outputNames.indexOf (outputDeviceName);

        if (inputIndex >= 0 || outputIndex >= 0)
            return new JackAudioIODevice (outputIndex >= 0 ? outputDeviceName
                                                           : inputDeviceName,
                                          inputIds [inputIndex],
                                          outputIds [outputIndex]);

        return nullptr;
    }

    void portConnectionChange()    { callDeviceChangeListeners(); }

 private:
    StringArray inputNames, outputNames, inputIds, outputIds;
    bool hasScanned;

    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (JackAudioIODeviceType)
 };

 void JackAudioIODevice::sendDeviceChangedCallback()
 {
    for (int i = activeDeviceTypes.size(); --i >= 0;)
        if (JackAudioIODeviceType* d = activeDeviceTypes[i])
            d->portConnectionChange();
 }

 //==============================================================================
 AudioIODeviceType* AudioIODeviceType::createAudioIODeviceType_JACK()
 {
    return new JackAudioIODeviceType();
 }

 } // namespace juce
--- a/source/modules/juce_audio_devices/native/juce_linux_Midi.cpp
+++ b/source/modules/juce_audio_devices/native/juce_linux_Midi.cpp
@@ -1,617 +0,0 @@
 /*
  ==============================================================================

   This file is part of the JUCE library.
   Copyright (c) 2017 - ROLI Ltd.

   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
 {

 #if JUCE_ALSA

 // You can define these strings in your app if you want to override the default names:
 #ifndef JUCE_ALSA_MIDI_NAME
 #define JUCE_ALSA_MIDI_NAME  JUCEApplicationBase::getInstance()->getApplicationName().toUTF8()
 #endif

 //==============================================================================
 namespace
 {

 //==============================================================================
 class AlsaClient : public ReferenceCountedObject
 {
 public:
    typedef ReferenceCountedObjectPtr<AlsaClient> Ptr;

    //==============================================================================
    // represents an input or output port of the supplied AlsaClient
    class Port
    {
    public:
        Port (AlsaClient& c, bool forInput) noexcept
            : portId (-1),
              callbackEnabled (false),
              client (c),
              isInput (forInput),
              callback (nullptr),
              maxEventSize (4 * 1024),
              midiInput (nullptr)
        {}

        ~Port()
        {
            if (isValid())
            {
                if (isInput)
                    enableCallback (false);
                else
                    snd_midi_event_free (midiParser);

                snd_seq_delete_simple_port (client.get(), portId);
            }
        }

        void connectWith (int sourceClient, int sourcePort) const noexcept
        {
            if (isInput)
                snd_seq_connect_from (client.get(), portId, sourceClient, sourcePort);
            else
                snd_seq_connect_to (client.get(), portId, sourceClient, sourcePort);
        }

        bool isValid() const noexcept
        {
            return client.get() != nullptr && portId >= 0;
        }

        void setupInput(MidiInput* input, MidiInputCallback* cb)
        {
            jassert (cb && input);

            callback = cb;
            midiInput = input;
        }

        void setupOutput()
        {
            jassert (! isInput);

            snd_midi_event_new ((size_t) maxEventSize, &midiParser);
        }

        void enableCallback (bool enable)
        {
            if (callbackEnabled != enable)
            {
                callbackEnabled = enable;

                if (enable)
                    client.registerCallback();
                else
                    client.unregisterCallback();
            }
        }

        bool sendMessageNow (const MidiMessage& message)
        {
            if (message.getRawDataSize() > maxEventSize)
            {
                maxEventSize = message.getRawDataSize();
                snd_midi_event_free (midiParser);
                snd_midi_event_new ((size_t) maxEventSize, &midiParser);
            }

            snd_seq_event_t event;
            snd_seq_ev_clear (&event);

            long numBytes = (long) message.getRawDataSize();
            const uint8* data = message.getRawData();

            snd_seq_t* seqHandle = client.get();
            bool success = true;

            while (numBytes > 0)
            {
                const long numSent = snd_midi_event_encode (midiParser, data, numBytes, &event);

                if (numSent <= 0)
                {
                    success = numSent == 0;
                    break;
                }

                numBytes -= numSent;
                data += numSent;

                snd_seq_ev_set_source (&event, (unsigned char) portId);
                snd_seq_ev_set_subs (&event);
                snd_seq_ev_set_direct (&event);

                if (snd_seq_event_output_direct (seqHandle, &event) < 0)
                {
                    success = false;
                    break;
                }
            }

            snd_midi_event_reset_encode (midiParser);
            return success;
        }


        bool operator== (const Port& lhs) const noexcept
        {
            return portId != -1 && portId == lhs.portId;
        }

        int portId;
        bool callbackEnabled;

    private:
        friend class AlsaClient;

        AlsaClient& client;
        bool isInput;
        MidiInputCallback* callback;
        snd_midi_event_t* midiParser;
        int maxEventSize;
        MidiInput* midiInput;

        void createPort (const String& name, bool enableSubscription)
        {
            if (snd_seq_t* seqHandle = client.get())
            {
                const unsigned int caps =
                    isInput
                    ? (SND_SEQ_PORT_CAP_WRITE | (enableSubscription ? SND_SEQ_PORT_CAP_SUBS_WRITE : 0))
                    : (SND_SEQ_PORT_CAP_WRITE | (enableSubscription ? SND_SEQ_PORT_CAP_SUBS_READ : 0));
                portId = snd_seq_create_simple_port (seqHandle, name.toUTF8(), caps,
                                                     SND_SEQ_PORT_TYPE_MIDI_GENERIC |
                                                     SND_SEQ_PORT_TYPE_APPLICATION);
            }
        }

        void handleIncomingMidiMessage (const MidiMessage& message) const
        {
            callback->handleIncomingMidiMessage (midiInput, message);
        }

        void handlePartialSysexMessage (const uint8* messageData, int numBytesSoFar, double timeStamp)
        {
            callback->handlePartialSysexMessage (midiInput, messageData, numBytesSoFar, timeStamp);
        }
    };

    static Ptr getInstance()
    {
        if (instance == nullptr)
            instance = new AlsaClient();

        return instance;
    }

    void registerCallback()
    {
        if (inputThread == nullptr)
            inputThread = new MidiInputThread (*this);

        if (++activeCallbacks - 1 == 0)
            inputThread->startThread();
    }

    void unregisterCallback()
    {
        jassert (activeCallbacks.get() > 0);
        if (--activeCallbacks == 0 && inputThread->isThreadRunning())
            inputThread->signalThreadShouldExit();
    }

    void handleIncomingMidiMessage (snd_seq_event* event, const MidiMessage& message)
    {
        if (event->dest.port < ports.size()
            && ports[event->dest.port]->callbackEnabled)
            ports[event->dest.port]->handleIncomingMidiMessage (message);
    }

    void handlePartialSysexMessage (snd_seq_event* event, const uint8* messageData, int numBytesSoFar, double timeStamp)
    {
        if (event->dest.port < ports.size()
            && ports[event->dest.port]->callbackEnabled)
            ports[event->dest.port]->handlePartialSysexMessage (messageData, numBytesSoFar, timeStamp);
    }

    snd_seq_t* get() const noexcept     { return handle; }
    int getId() const noexcept          { return clientId; }

    Port* createPort (const String& name, bool forInput, bool enableSubscription)
    {
        Port* port = new Port (*this, forInput);
        port->createPort (name, enableSubscription);
        ports.set (port->portId, port);
        incReferenceCount();
        return port;
    }

    void deletePort (Port* port)
    {
        ports.remove (port->portId);
        decReferenceCount();
    }

 private:
    snd_seq_t* handle;
    int clientId;
    OwnedArray<Port> ports;
    Atomic<int> activeCallbacks;
    CriticalSection callbackLock;

    static AlsaClient* instance;

    //==============================================================================
    friend class ReferenceCountedObjectPtr<AlsaClient>;
    friend struct ContainerDeletePolicy<AlsaClient>;

    AlsaClient()
        : handle (nullptr),
          inputThread (nullptr)
    {
        jassert (instance == nullptr);

        snd_seq_open (&handle, "default", SND_SEQ_OPEN_DUPLEX, 0);
        snd_seq_nonblock (handle, SND_SEQ_NONBLOCK);
        snd_seq_set_client_name (handle, JUCE_ALSA_MIDI_NAME);
        clientId = snd_seq_client_id(handle);

        // It's good idea to pre-allocate a good number of elements
        ports.ensureStorageAllocated (32);
    }

    ~AlsaClient()
    {
        jassert (instance != nullptr);

        instance = nullptr;

        if (handle != nullptr)
            snd_seq_close (handle);

        jassert (activeCallbacks.get() == 0);

        if (inputThread)
            inputThread->stopThread (3000);
    }

    //==============================================================================
    class MidiInputThread   : public Thread
    {
    public:
        MidiInputThread (AlsaClient& c)
            : Thread ("Juce MIDI Input"), client (c), concatenator (2048)
        {
            jassert (client.get() != nullptr);
        }

        void run() override
        {
            const int maxEventSize = 16 * 1024;
            snd_midi_event_t* midiParser;
            snd_seq_t* seqHandle = client.get();

            if (snd_midi_event_new (maxEventSize, &midiParser) >= 0)
            {
                const int numPfds = snd_seq_poll_descriptors_count (seqHandle, POLLIN);
                HeapBlock<pollfd> pfd ((size_t) numPfds);
                snd_seq_poll_descriptors (seqHandle, pfd, (unsigned int) numPfds, POLLIN);

                HeapBlock<uint8> buffer (maxEventSize);

                while (! threadShouldExit())
                {
                    if (poll (pfd, (nfds_t) numPfds, 100) > 0) // there was a "500" here which is a bit long when we exit the program and have to wait for a timeout on this poll call
                    {
                        if (threadShouldExit())
                            break;

                        do
                        {
                            snd_seq_event_t* inputEvent = nullptr;

                            if (snd_seq_event_input (seqHandle, &inputEvent) >= 0)
                            {
                                // xxx what about SYSEXes that are too big for the buffer?
                                const long numBytes = snd_midi_event_decode (midiParser, buffer,
                                                                            maxEventSize, inputEvent);

                                snd_midi_event_reset_decode (midiParser);

                                concatenator.pushMidiData (buffer, (int) numBytes,
                                                           Time::getMillisecondCounter() * 0.001,
                                                           inputEvent, client);

                                snd_seq_free_event (inputEvent);
                            }
                        }
                        while (snd_seq_event_input_pending (seqHandle, 0) > 0);
                    }
                }

                snd_midi_event_free (midiParser);
            }
        }

    private:
        AlsaClient& client;
        MidiDataConcatenator concatenator;
    };

    ScopedPointer<MidiInputThread> inputThread;
 };

 AlsaClient* AlsaClient::instance = nullptr;

 //==============================================================================
 static AlsaClient::Port* iterateMidiClient (const AlsaClient::Ptr& client,
                                            snd_seq_client_info_t* clientInfo,
                                            const bool forInput,
                                            StringArray& deviceNamesFound,
                                            const int deviceIndexToOpen)
 {
    AlsaClient::Port* port = nullptr;

    snd_seq_t* seqHandle = client->get();
    snd_seq_port_info_t* portInfo = nullptr;

    snd_seq_port_info_alloca (&portInfo);
    jassert (portInfo);
    int numPorts = snd_seq_client_info_get_num_ports (clientInfo);
    const int sourceClient = snd_seq_client_info_get_client (clientInfo);

    snd_seq_port_info_set_client (portInfo, sourceClient);
    snd_seq_port_info_set_port (portInfo, -1);

    while (--numPorts >= 0)
    {
        if (snd_seq_query_next_port (seqHandle, portInfo) == 0
            && (snd_seq_port_info_get_capability (portInfo)
                & (forInput ? SND_SEQ_PORT_CAP_SUBS_WRITE : SND_SEQ_PORT_CAP_SUBS_READ)) != 0)
        {
            const String portName = snd_seq_port_info_get_name(portInfo);

            deviceNamesFound.add (portName);

            if (deviceNamesFound.size() == deviceIndexToOpen + 1)
            {
                const int sourcePort = snd_seq_port_info_get_port (portInfo);
                if (sourcePort != -1)
                {
                    port = client->createPort (portName, forInput, false);
                    jassert (port->isValid());
                    port->connectWith (sourceClient, sourcePort);
                    break;
                }
            }
        }
    }

    return port;
 }

 static AlsaClient::Port* iterateMidiDevices (const bool forInput,
                                             StringArray& deviceNamesFound,
                                             const int deviceIndexToOpen)
 {
    AlsaClient::Port* port = nullptr;
    const AlsaClient::Ptr client (AlsaClient::getInstance());

    if (snd_seq_t* const seqHandle = client->get())
    {
        snd_seq_system_info_t* systemInfo = nullptr;
        snd_seq_client_info_t* clientInfo = nullptr;

        snd_seq_system_info_alloca (&systemInfo);
        jassert(systemInfo);
        if (snd_seq_system_info (seqHandle, systemInfo) == 0)
        {
            snd_seq_client_info_alloca (&clientInfo);
            jassert(clientInfo);
            int numClients = snd_seq_system_info_get_cur_clients (systemInfo);

            while (--numClients >= 0)
            {
                if (snd_seq_query_next_client (seqHandle, clientInfo) == 0)
                {
                    const int sourceClient = snd_seq_client_info_get_client (clientInfo);
                    if (sourceClient != client->getId()
                        && sourceClient != SND_SEQ_CLIENT_SYSTEM)
                    {
                        port = iterateMidiClient (client, clientInfo, forInput,
                                                  deviceNamesFound, deviceIndexToOpen);
                        if (port)
                            break;
                    }
                }
            }
        }
    }

    deviceNamesFound.appendNumbersToDuplicates (true, true);

    return port;
 }

 } // namespace

 StringArray MidiOutput::getDevices()
 {
    StringArray devices;
    iterateMidiDevices (false, devices, -1);
    return devices;
 }

 int MidiOutput::getDefaultDeviceIndex()
 {
    return 0;
 }

 MidiOutput* MidiOutput::openDevice (int deviceIndex)
 {
    MidiOutput* newDevice = nullptr;

    StringArray devices;
    AlsaClient::Port* port = iterateMidiDevices (false, devices, deviceIndex);

    if (port == nullptr)
        return nullptr;

    jassert (port->isValid());

    newDevice = new MidiOutput (devices [deviceIndex]);
    port->setupOutput();
    newDevice->internal = port;

    return newDevice;
 }

 MidiOutput* MidiOutput::createNewDevice (const String& deviceName)
 {
    MidiOutput* newDevice = nullptr;

    const AlsaClient::Ptr client (AlsaClient::getInstance());

    AlsaClient::Port* port = client->createPort (deviceName, false, true);

    jassert (port->isValid());

    newDevice = new MidiOutput (deviceName);
    port->setupOutput();
    newDevice->internal = port;

    return newDevice;
 }

 MidiOutput::~MidiOutput()
 {
    stopBackgroundThread();

    AlsaClient::Ptr client (AlsaClient::getInstance());
    client->deletePort (static_cast<AlsaClient::Port*> (internal));
 }

 void MidiOutput::sendMessageNow (const MidiMessage& message)
 {
    static_cast<AlsaClient::Port*> (internal)->sendMessageNow (message);
 }

 //==============================================================================
 MidiInput::MidiInput (const String& nm)
    : name (nm), internal (nullptr)
 {
 }

 MidiInput::~MidiInput()
 {
    stop();
    AlsaClient::Ptr client (AlsaClient::getInstance());
    client->deletePort (static_cast<AlsaClient::Port*> (internal));
 }

 void MidiInput::start()
 {
    static_cast<AlsaClient::Port*> (internal)->enableCallback (true);
 }

 void MidiInput::stop()
 {
    static_cast<AlsaClient::Port*> (internal)->enableCallback (false);
 }

 int MidiInput::getDefaultDeviceIndex()
 {
    return 0;
 }

 StringArray MidiInput::getDevices()
 {
    StringArray devices;
    iterateMidiDevices (true, devices, -1);
    return devices;
 }

 MidiInput* MidiInput::openDevice (int deviceIndex, MidiInputCallback* callback)
 {
    MidiInput* newDevice = nullptr;

    StringArray devices;
    AlsaClient::Port* port = iterateMidiDevices (true, devices, deviceIndex);

    if (port == nullptr)
        return nullptr;

    jassert (port->isValid());

    newDevice = new MidiInput (devices [deviceIndex]);
    port->setupInput (newDevice, callback);
    newDevice->internal = port;

    return newDevice;
 }

 MidiInput* MidiInput::createNewDevice (const String& deviceName, MidiInputCallback* callback)
 {
    MidiInput* newDevice = nullptr;

    AlsaClient::Ptr client (AlsaClient::getInstance());

    AlsaClient::Port* port = client->createPort (deviceName, true, true);

    jassert (port->isValid());

    newDevice = new MidiInput (deviceName);
    port->setupInput (newDevice, callback);
    newDevice->internal = port;

    return newDevice;
 }


 //==============================================================================
 #else

 // (These are just stub functions if ALSA is unavailable...)

 StringArray MidiOutput::getDevices()                                { return {}; }
 int MidiOutput::getDefaultDeviceIndex()                             { return 0; }
 MidiOutput* MidiOutput::openDevice (int)                            { return nullptr; }
 MidiOutput* MidiOutput::createNewDevice (const String&)             { return nullptr; }
 MidiOutput::~MidiOutput()   {}
 void MidiOutput::sendMessageNow (const MidiMessage&)    {}

 MidiInput::MidiInput (const String& nm) : name (nm), internal (nullptr)  {}
 MidiInput::~MidiInput() {}
 void MidiInput::start() {}
 void MidiInput::stop()  {}
 int MidiInput::getDefaultDeviceIndex()      { return 0; }
 StringArray MidiInput::getDevices()         { return {}; }
 MidiInput* MidiInput::openDevice (int, MidiInputCallback*)                  { return nullptr; }
 MidiInput* MidiInput::createNewDevice (const String&, MidiInputCallback*)   { return nullptr; }

 #endif

 } // namespace juce
--- a/source/modules/juce_audio_devices/native/juce_mac_CoreAudio.cpp
+++ b/source/modules/juce_audio_devices/native/juce_mac_CoreAudio.cpp
--- a/source/modules/juce_audio_devices/native/juce_mac_CoreMidi.cpp
+++ b/source/modules/juce_audio_devices/native/juce_mac_CoreMidi.cpp
@@ -1,562 +0,0 @@
 /*
  ==============================================================================

   This file is part of the JUCE library.
   Copyright (c) 2017 - ROLI Ltd.

   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
 {

 #ifndef JUCE_LOG_COREMIDI_ERRORS
 #define JUCE_LOG_COREMIDI_ERRORS 1
 #endif

 namespace CoreMidiHelpers
 {
    static bool checkError (const OSStatus err, const int lineNum)
    {
        if (err == noErr)
            return true;

       #if JUCE_LOG_COREMIDI_ERRORS
        Logger::writeToLog ("CoreMIDI error: " + String (lineNum) + " - " + String::toHexString ((int) err));
       #endif

        ignoreUnused (lineNum);
        return false;
    }

    #undef CHECK_ERROR
    #define CHECK_ERROR(a) CoreMidiHelpers::checkError (a, __LINE__)

    //==============================================================================
    struct ScopedCFString
    {
        ScopedCFString() noexcept : cfString (nullptr) {}
        ~ScopedCFString() noexcept  { if (cfString != nullptr) CFRelease (cfString); }

        CFStringRef cfString;
    };

    static String getMidiObjectName (MIDIObjectRef entity)
    {
        String result;
        CFStringRef str = nullptr;
        MIDIObjectGetStringProperty (entity, kMIDIPropertyName, &str);

        if (str != nullptr)
        {
            result = String::fromCFString (str);
            CFRelease (str);
        }

        return result;
    }

    void enableSimulatorMidiSession()
    {
       #if TARGET_OS_SIMULATOR
        static bool hasEnabledNetworkSession = false;

        if (! hasEnabledNetworkSession)
        {
            MIDINetworkSession* session = [MIDINetworkSession defaultSession];
            session.enabled = YES;
            session.connectionPolicy = MIDINetworkConnectionPolicy_Anyone;

            hasEnabledNetworkSession = true;
        }
       #endif
    }

    static String getEndpointName (MIDIEndpointRef endpoint, bool isExternal)
    {
        String result (getMidiObjectName (endpoint));

        MIDIEntityRef entity = 0;  // NB: don't attempt to use nullptr for refs - it fails in some types of build.
        MIDIEndpointGetEntity (endpoint, &entity);

        if (entity == 0)
            return result; // probably virtual

        if (result.isEmpty())
            result = getMidiObjectName (entity);  // endpoint name is empty - try the entity

        // now consider the device's name
        MIDIDeviceRef device = 0;
        MIDIEntityGetDevice (entity, &device);

        if (device != 0)
        {
            const String deviceName (getMidiObjectName (device));

            if (deviceName.isNotEmpty())
            {
                // if an external device has only one entity, throw away
                // the endpoint name and just use the device name
                if (isExternal && MIDIDeviceGetNumberOfEntities (device) < 2)
                {
                    result = deviceName;
                }
                else if (! result.startsWithIgnoreCase (deviceName))
                {
                    // prepend the device name to the entity name
                    result = (deviceName + " " + result).trimEnd();
                }
            }
        }

        return result;
    }

    static String getConnectedEndpointName (MIDIEndpointRef endpoint)
    {
        String result;

        // Does the endpoint have connections?
        CFDataRef connections = nullptr;
        int numConnections = 0;

        MIDIObjectGetDataProperty (endpoint, kMIDIPropertyConnectionUniqueID, &connections);

        if (connections != nullptr)
        {
            numConnections = ((int) CFDataGetLength (connections)) / (int) sizeof (MIDIUniqueID);

            if (numConnections > 0)
            {
                const SInt32* pid = reinterpret_cast<const SInt32*> (CFDataGetBytePtr (connections));

                for (int i = 0; i < numConnections; ++i, ++pid)
                {
                    MIDIUniqueID uid = (MIDIUniqueID) ByteOrder::swapIfLittleEndian ((uint32) *pid);
                    MIDIObjectRef connObject;
                    MIDIObjectType connObjectType;
                    OSStatus err = MIDIObjectFindByUniqueID (uid, &connObject, &connObjectType);

                    if (err == noErr)
                    {
                        String s;

                        if (connObjectType == kMIDIObjectType_ExternalSource
                             || connObjectType == kMIDIObjectType_ExternalDestination)
                        {
                            // Connected to an external device's endpoint (10.3 and later).
                            s = getEndpointName (static_cast<MIDIEndpointRef> (connObject), true);
                        }
                        else
                        {
                            // Connected to an external device (10.2) (or something else, catch-all)
                            s = getMidiObjectName (connObject);
                        }

                        if (s.isNotEmpty())
                        {
                            if (result.isNotEmpty())
                                result += ", ";

                            result += s;
                        }
                    }
                }
            }

            CFRelease (connections);
        }

        if (result.isEmpty())  // Here, either the endpoint had no connections, or we failed to obtain names for them.
            result = getEndpointName (endpoint, false);

        return result;
    }

    static StringArray findDevices (const bool forInput)
    {
        // It seems that OSX can be a bit picky about the thread that's first used to
        // search for devices. It's safest to use the message thread for calling this.
        jassert (MessageManager::getInstance()->isThisTheMessageThread());

        enableSimulatorMidiSession();

        const ItemCount num = forInput ? MIDIGetNumberOfSources()
                                       : MIDIGetNumberOfDestinations();
        StringArray s;

        for (ItemCount i = 0; i < num; ++i)
        {
            MIDIEndpointRef dest = forInput ? MIDIGetSource (i)
                                            : MIDIGetDestination (i);
            String name;

            if (dest != 0)
                name = getConnectedEndpointName (dest);

            if (name.isEmpty())
                name = "<error>";

            s.add (name);
        }

        return s;
    }

    static void globalSystemChangeCallback (const MIDINotification*, void*)
    {
        // TODO.. Should pass-on this notification..
    }

    static String getGlobalMidiClientName()
    {
        if (JUCEApplicationBase* const app = JUCEApplicationBase::getInstance())
            return app->getApplicationName();

        return "JUCE";
    }

    static MIDIClientRef getGlobalMidiClient()
    {
        static MIDIClientRef globalMidiClient = 0;

        if (globalMidiClient == 0)
        {
            // Since OSX 10.6, the MIDIClientCreate function will only work
            // correctly when called from the message thread!
            jassert (MessageManager::getInstance()->isThisTheMessageThread());

            enableSimulatorMidiSession();

            CoreMidiHelpers::ScopedCFString name;
            name.cfString = getGlobalMidiClientName().toCFString();
            CHECK_ERROR (MIDIClientCreate (name.cfString, &globalSystemChangeCallback, nullptr, &globalMidiClient));
        }

        return globalMidiClient;
    }

    //==============================================================================
    class MidiPortAndEndpoint
    {
    public:
        MidiPortAndEndpoint (MIDIPortRef p, MIDIEndpointRef ep) noexcept
            : port (p), endPoint (ep)
        {
        }

        ~MidiPortAndEndpoint() noexcept
        {
            if (port != 0)
                MIDIPortDispose (port);

            if (port == 0 && endPoint != 0) // if port == nullptr, it means we created the endpoint, so it's safe to delete it
                MIDIEndpointDispose (endPoint);
        }

        void send (const MIDIPacketList* const packets) noexcept
        {
            if (port != 0)
                MIDISend (port, endPoint, packets);
            else
                MIDIReceived (endPoint, packets);
        }

        MIDIPortRef port;
        MIDIEndpointRef endPoint;
    };

    //==============================================================================
    class MidiPortAndCallback;
    CriticalSection callbackLock;
    Array<MidiPortAndCallback*> activeCallbacks;

    class MidiPortAndCallback
    {
    public:
        MidiPortAndCallback (MidiInputCallback& cb)
            : input (nullptr), active (false), callback (cb), concatenator (2048)
        {
        }

        ~MidiPortAndCallback()
        {
            active = false;

            {
                const ScopedLock sl (callbackLock);
                activeCallbacks.removeFirstMatchingValue (this);
            }

            if (portAndEndpoint != 0 && portAndEndpoint->port != 0)
                CHECK_ERROR (MIDIPortDisconnectSource (portAndEndpoint->port, portAndEndpoint->endPoint));
        }

        void handlePackets (const MIDIPacketList* const pktlist)
        {
            const double time = Time::getMillisecondCounterHiRes() * 0.001;

            const ScopedLock sl (callbackLock);
            if (activeCallbacks.contains (this) && active)
            {
                const MIDIPacket* packet = &pktlist->packet[0];

                for (unsigned int i = 0; i < pktlist->numPackets; ++i)
                {
                    concatenator.pushMidiData (packet->data, (int) packet->length, time,
                                               input, callback);

                    packet = MIDIPacketNext (packet);
                }
            }
        }

        MidiInput* input;
        ScopedPointer<MidiPortAndEndpoint> portAndEndpoint;
        volatile bool active;

    private:
        MidiInputCallback& callback;
        MidiDataConcatenator concatenator;
    };

    static void midiInputProc (const MIDIPacketList* pktlist, void* readProcRefCon, void* /*srcConnRefCon*/)
    {
        static_cast<MidiPortAndCallback*> (readProcRefCon)->handlePackets (pktlist);
    }
 }

 //==============================================================================
 StringArray MidiOutput::getDevices()        { return CoreMidiHelpers::findDevices (false); }
 int MidiOutput::getDefaultDeviceIndex()     { return 0; }

 MidiOutput* MidiOutput::openDevice (int index)
 {
    MidiOutput* mo = nullptr;

    if (isPositiveAndBelow (index, MIDIGetNumberOfDestinations()))
    {
        MIDIEndpointRef endPoint = MIDIGetDestination ((ItemCount) index);

        CoreMidiHelpers::ScopedCFString pname;

        if (CHECK_ERROR (MIDIObjectGetStringProperty (endPoint, kMIDIPropertyName, &pname.cfString)))
        {
            MIDIClientRef client = CoreMidiHelpers::getGlobalMidiClient();
            MIDIPortRef port;
            String deviceName = CoreMidiHelpers::getConnectedEndpointName (endPoint);

            if (client != 0 && CHECK_ERROR (MIDIOutputPortCreate (client, pname.cfString, &port)))
            {
                mo = new MidiOutput (deviceName);
                mo->internal = new CoreMidiHelpers::MidiPortAndEndpoint (port, endPoint);
            }
        }
    }

    return mo;
 }

 MidiOutput* MidiOutput::createNewDevice (const String& deviceName)
 {
    MIDIClientRef client = CoreMidiHelpers::getGlobalMidiClient();
    MIDIEndpointRef endPoint;

    CoreMidiHelpers::ScopedCFString name;
    name.cfString = deviceName.toCFString();

    if (client != 0 && CHECK_ERROR (MIDISourceCreate (client, name.cfString, &endPoint)))
    {
        MidiOutput* mo = new MidiOutput (deviceName);
        mo->internal = new CoreMidiHelpers::MidiPortAndEndpoint (0, endPoint);
        return mo;
    }

    return nullptr;
 }

 MidiOutput::~MidiOutput()
 {
    stopBackgroundThread();

    delete static_cast<CoreMidiHelpers::MidiPortAndEndpoint*> (internal);
 }

 void MidiOutput::sendMessageNow (const MidiMessage& message)
 {
   #if JUCE_IOS
    const MIDITimeStamp timeStamp = mach_absolute_time();
   #else
    const MIDITimeStamp timeStamp = AudioGetCurrentHostTime();
   #endif

    HeapBlock<MIDIPacketList> allocatedPackets;
    MIDIPacketList stackPacket;
    MIDIPacketList* packetToSend = &stackPacket;
    const size_t dataSize = (size_t) message.getRawDataSize();

    if (message.isSysEx())
    {
        const int maxPacketSize = 256;
        int pos = 0, bytesLeft = (int) dataSize;
        const int numPackets = (bytesLeft + maxPacketSize - 1) / maxPacketSize;
        allocatedPackets.malloc ((size_t) (32 * (size_t) numPackets + dataSize), 1);
        packetToSend = allocatedPackets;
        packetToSend->numPackets = (UInt32) numPackets;

        MIDIPacket* p = packetToSend->packet;

        for (int i = 0; i < numPackets; ++i)
        {
            p->timeStamp = timeStamp;
            p->length = (UInt16) jmin (maxPacketSize, bytesLeft);
            memcpy (p->data, message.getRawData() + pos, p->length);
            pos += p->length;
            bytesLeft -= p->length;
            p = MIDIPacketNext (p);
        }
    }
    else if (dataSize < 65536) // max packet size
    {
        const size_t stackCapacity = sizeof (stackPacket.packet->data);

        if (dataSize > stackCapacity)
        {
            allocatedPackets.malloc ((sizeof (MIDIPacketList) - stackCapacity) + dataSize, 1);
            packetToSend = allocatedPackets;
        }

        packetToSend->numPackets = 1;
        MIDIPacket& p = *(packetToSend->packet);
        p.timeStamp = timeStamp;
        p.length = (UInt16) dataSize;
        memcpy (p.data, message.getRawData(), dataSize);
    }
    else
    {
        jassertfalse; // packet too large to send!
        return;
    }

    static_cast<CoreMidiHelpers::MidiPortAndEndpoint*> (internal)->send (packetToSend);
 }

 //==============================================================================
 StringArray MidiInput::getDevices()     { return CoreMidiHelpers::findDevices (true); }
 int MidiInput::getDefaultDeviceIndex()  { return 0; }

 MidiInput* MidiInput::openDevice (int index, MidiInputCallback* callback)
 {
    jassert (callback != nullptr);

    using namespace CoreMidiHelpers;
    MidiInput* newInput = nullptr;

    if (isPositiveAndBelow (index, MIDIGetNumberOfSources()))
    {
        if (MIDIEndpointRef endPoint = MIDIGetSource ((ItemCount) index))
        {
            ScopedCFString name;

            if (CHECK_ERROR (MIDIObjectGetStringProperty (endPoint, kMIDIPropertyName, &name.cfString)))
            {
                if (MIDIClientRef client = getGlobalMidiClient())
                {
                    MIDIPortRef port;
                    ScopedPointer<MidiPortAndCallback> mpc (new MidiPortAndCallback (*callback));

                    if (CHECK_ERROR (MIDIInputPortCreate (client, name.cfString, midiInputProc, mpc, &port)))
                    {
                        if (CHECK_ERROR (MIDIPortConnectSource (port, endPoint, nullptr)))
                        {
                            mpc->portAndEndpoint = new MidiPortAndEndpoint (port, endPoint);

                            newInput = new MidiInput (getDevices() [index]);
                            mpc->input = newInput;
                            newInput->internal = mpc;

                            const ScopedLock sl (callbackLock);
                            activeCallbacks.add (mpc.release());
                        }
                        else
                        {
                            CHECK_ERROR (MIDIPortDispose (port));
                        }
                    }
                }
            }
        }
    }

    return newInput;
 }

 MidiInput* MidiInput::createNewDevice (const String& deviceName, MidiInputCallback* callback)
 {
    jassert (callback != nullptr);

    using namespace CoreMidiHelpers;
    MidiInput* mi = nullptr;

    if (MIDIClientRef client = getGlobalMidiClient())
    {
        ScopedPointer<MidiPortAndCallback> mpc (new MidiPortAndCallback (*callback));
        mpc->active = false;

        MIDIEndpointRef endPoint;
        ScopedCFString name;
        name.cfString = deviceName.toCFString();

        if (CHECK_ERROR (MIDIDestinationCreate (client, name.cfString, midiInputProc, mpc, &endPoint)))
        {
            mpc->portAndEndpoint = new MidiPortAndEndpoint (0, endPoint);

            mi = new MidiInput (deviceName);
            mpc->input = mi;
            mi->internal = mpc;

            const ScopedLock sl (callbackLock);
            activeCallbacks.add (mpc.release());
        }
    }

    return mi;
 }

 MidiInput::MidiInput (const String& nm)  : name (nm)
 {
 }

 MidiInput::~MidiInput()
 {
    delete static_cast<CoreMidiHelpers::MidiPortAndCallback*> (internal);
 }

 void MidiInput::start()
 {
    const ScopedLock sl (CoreMidiHelpers::callbackLock);
    static_cast<CoreMidiHelpers::MidiPortAndCallback*> (internal)->active = true;
 }

 void MidiInput::stop()
 {
    const ScopedLock sl (CoreMidiHelpers::callbackLock);
    static_cast<CoreMidiHelpers::MidiPortAndCallback*> (internal)->active = false;
 }

 #undef CHECK_ERROR

 } // namespace juce
--- a/source/modules/juce_audio_devices/native/juce_win32_ASIO.cpp
+++ b/source/modules/juce_audio_devices/native/juce_win32_ASIO.cpp
--- a/source/modules/juce_audio_devices/native/juce_win32_DirectSound.cpp
+++ b/source/modules/juce_audio_devices/native/juce_win32_DirectSound.cpp
--- a/source/modules/juce_audio_devices/native/juce_win32_Midi.cpp
+++ b/source/modules/juce_audio_devices/native/juce_win32_Midi.cpp
--- a/source/modules/juce_audio_devices/native/juce_win32_WASAPI.cpp
+++ b/source/modules/juce_audio_devices/native/juce_win32_WASAPI.cpp
--- a/source/modules/juce_audio_devices/sources/juce_AudioSourcePlayer.cpp
+++ b/source/modules/juce_audio_devices/sources/juce_AudioSourcePlayer.cpp
@@ -1,185 +0,0 @@
 /*
  ==============================================================================

   This file is part of the JUCE library.
   Copyright (c) 2017 - ROLI Ltd.

   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
 {

 AudioSourcePlayer::AudioSourcePlayer()
    : source (nullptr),
      sampleRate (0),
      bufferSize (0),
      lastGain (1.0f),
      gain (1.0f)
 {
 }

 AudioSourcePlayer::~AudioSourcePlayer()
 {
    setSource (nullptr);
 }

 void AudioSourcePlayer::setSource (AudioSource* newSource)
 {
    if (source != newSource)
    {
        AudioSource* const oldSource = source;

        if (newSource != nullptr && bufferSize > 0 && sampleRate > 0)
            newSource->prepareToPlay (bufferSize, sampleRate);

        {
            const ScopedLock sl (readLock);
            source = newSource;
        }

        if (oldSource != nullptr)
            oldSource->releaseResources();
    }
 }

 void AudioSourcePlayer::setGain (const float newGain) noexcept
 {
    gain = newGain;
 }

 void AudioSourcePlayer::audioDeviceIOCallback (const float** inputChannelData,
                                               int totalNumInputChannels,
                                               float** outputChannelData,
                                               int totalNumOutputChannels,
                                               int numSamples)
 {
    // these should have been prepared by audioDeviceAboutToStart()...
    jassert (sampleRate > 0 && bufferSize > 0);

    const ScopedLock sl (readLock);

    if (source != nullptr)
    {
        int numActiveChans = 0, numInputs = 0, numOutputs = 0;

        // messy stuff needed to compact the channels down into an array
        // of non-zero pointers..
        for (int i = 0; i < totalNumInputChannels; ++i)
        {
            if (inputChannelData[i] != nullptr)
            {
                inputChans [numInputs++] = inputChannelData[i];
                if (numInputs >= numElementsInArray (inputChans))
                    break;
            }
        }

        for (int i = 0; i < totalNumOutputChannels; ++i)
        {
            if (outputChannelData[i] != nullptr)
            {
                outputChans [numOutputs++] = outputChannelData[i];
                if (numOutputs >= numElementsInArray (outputChans))
                    break;
            }
        }

        if (numInputs > numOutputs)
        {
            // if there aren't enough output channels for the number of
            // inputs, we need to create some temporary extra ones (can't
            // use the input data in case it gets written to)
            tempBuffer.setSize (numInputs - numOutputs, numSamples,
                                false, false, true);

            for (int i = 0; i < numOutputs; ++i)
            {
                channels[numActiveChans] = outputChans[i];
                memcpy (channels[numActiveChans], inputChans[i], sizeof (float) * (size_t) numSamples);
                ++numActiveChans;
            }

            for (int i = numOutputs; i < numInputs; ++i)
            {
                channels[numActiveChans] = tempBuffer.getWritePointer (i - numOutputs);
                memcpy (channels[numActiveChans], inputChans[i], sizeof (float) * (size_t) numSamples);
                ++numActiveChans;
            }
        }
        else
        {
            for (int i = 0; i < numInputs; ++i)
            {
                channels[numActiveChans] = outputChans[i];
                memcpy (channels[numActiveChans], inputChans[i], sizeof (float) * (size_t) numSamples);
                ++numActiveChans;
            }

            for (int i = numInputs; i < numOutputs; ++i)
            {
                channels[numActiveChans] = outputChans[i];
                zeromem (channels[numActiveChans], sizeof (float) * (size_t) numSamples);
                ++numActiveChans;
            }
        }

        AudioSampleBuffer buffer (channels, numActiveChans, numSamples);

        AudioSourceChannelInfo info (&buffer, 0, numSamples);
        source->getNextAudioBlock (info);

        for (int i = info.buffer->getNumChannels(); --i >= 0;)
            buffer.applyGainRamp (i, info.startSample, info.numSamples, lastGain, gain);

        lastGain = gain;
    }
    else
    {
        for (int i = 0; i < totalNumOutputChannels; ++i)
            if (outputChannelData[i] != nullptr)
                zeromem (outputChannelData[i], sizeof (float) * (size_t) numSamples);
    }
 }

 void AudioSourcePlayer::audioDeviceAboutToStart (AudioIODevice* device)
 {
    prepareToPlay (device->getCurrentSampleRate(),
                   device->getCurrentBufferSizeSamples());
 }

 void AudioSourcePlayer::prepareToPlay (double newSampleRate, int newBufferSize)
 {
    sampleRate = newSampleRate;
    bufferSize = newBufferSize;
    zeromem (channels, sizeof (channels));

    if (source != nullptr)
        source->prepareToPlay (bufferSize, sampleRate);
 }

 void AudioSourcePlayer::audioDeviceStopped()
 {
    if (source != nullptr)
        source->releaseResources();

    sampleRate = 0.0;
    bufferSize = 0;

    tempBuffer.setSize (2, 8);
 }

 } // namespace juce
--- a/source/modules/juce_audio_devices/sources/juce_AudioSourcePlayer.h
+++ b/source/modules/juce_audio_devices/sources/juce_AudioSourcePlayer.h
@@ -1,111 +0,0 @@
 /*
  ==============================================================================

   This file is part of the JUCE library.
   Copyright (c) 2017 - ROLI Ltd.

   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
 {

 //==============================================================================
 /**
    Wrapper class to continuously stream audio from an audio source to an
    AudioIODevice.

    This object acts as an AudioIODeviceCallback, so can be attached to an
    output device, and will stream audio from an AudioSource.
 */
 class JUCE_API  AudioSourcePlayer  : public AudioIODeviceCallback
 {
 public:
    //==============================================================================
    /** Creates an empty AudioSourcePlayer. */
    AudioSourcePlayer();

    /** Destructor.

        Make sure this object isn't still being used by an AudioIODevice before
        deleting it!
    */
    virtual ~AudioSourcePlayer();

    //==============================================================================
    /** Changes the current audio source to play from.

        If the source passed in is already being used, this method will do nothing.
        If the source is not null, its prepareToPlay() method will be called
        before it starts being used for playback.

        If there's another source currently playing, its releaseResources() method
        will be called after it has been swapped for the new one.

        @param newSource                the new source to use - this will NOT be deleted
                                        by this object when no longer needed, so it's the
                                        caller's responsibility to manage it.
    */
    void setSource (AudioSource* newSource);

    /** Returns the source that's playing.
        May return nullptr if there's no source.
    */
    AudioSource* getCurrentSource() const noexcept      { return source; }

    /** Sets a gain to apply to the audio data.
        @see getGain
    */
    void setGain (float newGain) noexcept;

    /** Returns the current gain.
        @see setGain
    */
    float getGain() const noexcept                      { return gain; }

    //==============================================================================
    /** Implementation of the AudioIODeviceCallback method. */
    void audioDeviceIOCallback (const float** inputChannelData,
                                int totalNumInputChannels,
                                float** outputChannelData,
                                int totalNumOutputChannels,
                                int numSamples) override;

    /** Implementation of the AudioIODeviceCallback method. */
    void audioDeviceAboutToStart (AudioIODevice* device) override;

    /** Implementation of the AudioIODeviceCallback method. */
    void audioDeviceStopped() override;

    /** An alternative method for initialising the source without an AudioIODevice. */
    void prepareToPlay (double sampleRate, int blockSize);

 private:
    //==============================================================================
    CriticalSection readLock;
    AudioSource* source;
    double sampleRate;
    int bufferSize;
    float* channels [128];
    float* outputChans [128];
    const float* inputChans [128];
    AudioSampleBuffer tempBuffer;
    float lastGain, gain;

    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (AudioSourcePlayer)
 };

 } // namespace juce
--- a/source/modules/juce_audio_devices/sources/juce_AudioTransportSource.cpp
+++ b/source/modules/juce_audio_devices/sources/juce_AudioTransportSource.cpp
@@ -1,286 +0,0 @@
 /*
  ==============================================================================

   This file is part of the JUCE library.
   Copyright (c) 2017 - ROLI Ltd.

   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
 {

 AudioTransportSource::AudioTransportSource()
 {
 }

 AudioTransportSource::~AudioTransportSource()
 {
    setSource (nullptr);
    releaseMasterResources();
 }

 void AudioTransportSource::setSource (PositionableAudioSource* const newSource,
                                      int readAheadSize, TimeSliceThread* readAheadThread,
                                      double sourceSampleRateToCorrectFor, int maxNumChannels)
 {
    if (source == newSource)
    {
        if (source == nullptr)
            return;

        setSource (nullptr, 0, nullptr); // deselect and reselect to avoid releasing resources wrongly
    }

    readAheadBufferSize = readAheadSize;
    sourceSampleRate = sourceSampleRateToCorrectFor;

    ResamplingAudioSource* newResamplerSource = nullptr;
    BufferingAudioSource* newBufferingSource = nullptr;
    PositionableAudioSource* newPositionableSource = nullptr;
    AudioSource* newMasterSource = nullptr;

    ScopedPointer<ResamplingAudioSource> oldResamplerSource (resamplerSource);
    ScopedPointer<BufferingAudioSource> oldBufferingSource (bufferingSource);
    AudioSource* oldMasterSource = masterSource;

    if (newSource != nullptr)
    {
        newPositionableSource = newSource;

        if (readAheadSize > 0)
        {
            // If you want to use a read-ahead buffer, you must also provide a TimeSliceThread
            // for it to use!
            jassert (readAheadThread != nullptr);

            newPositionableSource = newBufferingSource
                = new BufferingAudioSource (newPositionableSource, *readAheadThread,
                                            false, readAheadSize, maxNumChannels);
        }

        newPositionableSource->setNextReadPosition (0);

        if (sourceSampleRateToCorrectFor > 0)
            newMasterSource = newResamplerSource
                = new ResamplingAudioSource (newPositionableSource, false, maxNumChannels);
        else
            newMasterSource = newPositionableSource;

        if (isPrepared)
        {
            if (newResamplerSource != nullptr && sourceSampleRate > 0 && sampleRate > 0)
                newResamplerSource->setResamplingRatio (sourceSampleRate / sampleRate);

            newMasterSource->prepareToPlay (blockSize, sampleRate);
        }
    }

    {
        const ScopedLock sl (callbackLock);

        source = newSource;
        resamplerSource = newResamplerSource;
        bufferingSource = newBufferingSource;
        masterSource = newMasterSource;
        positionableSource = newPositionableSource;

        inputStreamEOF = false;
        playing = false;
    }

    if (oldMasterSource != nullptr)
        oldMasterSource->releaseResources();
 }

 void AudioTransportSource::start()
 {
    if ((! playing) && masterSource != nullptr)
    {
        {
            const ScopedLock sl (callbackLock);
            playing = true;
            stopped = false;
            inputStreamEOF = false;
        }

        sendChangeMessage();
    }
 }

 void AudioTransportSource::stop()
 {
    if (playing)
    {
        {
            const ScopedLock sl (callbackLock);
            playing = false;
        }

        int n = 500;
        while (--n >= 0 && ! stopped)
            Thread::sleep (2);

        sendChangeMessage();
    }
 }

 void AudioTransportSource::setPosition (double newPosition)
 {
    if (sampleRate > 0.0)
        setNextReadPosition ((int64) (newPosition * sampleRate));
 }

 double AudioTransportSource::getCurrentPosition() const
 {
    if (sampleRate > 0.0)
        return (double) getNextReadPosition() / sampleRate;

    return 0.0;
 }

 double AudioTransportSource::getLengthInSeconds() const
 {
    if (sampleRate > 0.0)
        return (double) getTotalLength() / sampleRate;

    return 0.0;
 }

 void AudioTransportSource::setNextReadPosition (int64 newPosition)
 {
    if (positionableSource != nullptr)
    {
        if (sampleRate > 0 && sourceSampleRate > 0)
            newPosition = (int64) ((double) newPosition * sourceSampleRate / sampleRate);

        positionableSource->setNextReadPosition (newPosition);

        if (resamplerSource != nullptr)
            resamplerSource->flushBuffers();

        inputStreamEOF = false;
    }
 }

 int64 AudioTransportSource::getNextReadPosition() const
 {
    if (positionableSource != nullptr)
    {
        const double ratio = (sampleRate > 0 && sourceSampleRate > 0) ? sampleRate / sourceSampleRate : 1.0;
        return (int64) ((double) positionableSource->getNextReadPosition() * ratio);
    }

    return 0;
 }

 int64 AudioTransportSource::getTotalLength() const
 {
    const ScopedLock sl (callbackLock);

    if (positionableSource != nullptr)
    {
        const double ratio = (sampleRate > 0 && sourceSampleRate > 0) ? sampleRate / sourceSampleRate : 1.0;
        return (int64) ((double) positionableSource->getTotalLength() * ratio);
    }

    return 0;
 }

 bool AudioTransportSource::isLooping() const
 {
    const ScopedLock sl (callbackLock);
    return positionableSource != nullptr && positionableSource->isLooping();
 }

 void AudioTransportSource::setGain (const float newGain) noexcept
 {
    gain = newGain;
 }

 void AudioTransportSource::prepareToPlay (int samplesPerBlockExpected, double newSampleRate)
 {
    const ScopedLock sl (callbackLock);

    sampleRate = newSampleRate;
    blockSize = samplesPerBlockExpected;

    if (masterSource != nullptr)
        masterSource->prepareToPlay (samplesPerBlockExpected, sampleRate);

    if (resamplerSource != nullptr && sourceSampleRate > 0)
        resamplerSource->setResamplingRatio (sourceSampleRate / sampleRate);

    inputStreamEOF = false;
    isPrepared = true;
 }

 void AudioTransportSource::releaseMasterResources()
 {
    const ScopedLock sl (callbackLock);

    if (masterSource != nullptr)
        masterSource->releaseResources();

    isPrepared = false;
 }

 void AudioTransportSource::releaseResources()
 {
    releaseMasterResources();
 }

 void AudioTransportSource::getNextAudioBlock (const AudioSourceChannelInfo& info)
 {
    const ScopedLock sl (callbackLock);

    if (masterSource != nullptr && ! stopped)
    {
        masterSource->getNextAudioBlock (info);

        if (! playing)
        {
            // just stopped playing, so fade out the last block..
            for (int i = info.buffer->getNumChannels(); --i >= 0;)
                info.buffer->applyGainRamp (i, info.startSample, jmin (256, info.numSamples), 1.0f, 0.0f);

            if (info.numSamples > 256)
                info.buffer->clear (info.startSample + 256, info.numSamples - 256);
        }

        if (positionableSource->getNextReadPosition() > positionableSource->getTotalLength() + 1
              && ! positionableSource->isLooping())
        {
            playing = false;
            inputStreamEOF = true;
            sendChangeMessage();
        }

        stopped = ! playing;

        for (int i = info.buffer->getNumChannels(); --i >= 0;)
            info.buffer->applyGainRamp (i, info.startSample, info.numSamples, lastGain, gain);
    }
    else
    {
        info.clearActiveBufferRegion();
        stopped = true;
    }

    lastGain = gain;
 }

 } // namespace juce
--- a/source/modules/juce_audio_devices/sources/juce_AudioTransportSource.h
+++ b/source/modules/juce_audio_devices/sources/juce_AudioTransportSource.h
@@ -1,176 +0,0 @@
 /*
  ==============================================================================

   This file is part of the JUCE library.
   Copyright (c) 2017 - ROLI Ltd.

   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
 {

 //==============================================================================
 /**
    An AudioSource that takes a PositionableAudioSource and allows it to be
    played, stopped, started, etc.

    This can also be told use a buffer and background thread to read ahead, and
    if can correct for different sample-rates.

    You may want to use one of these along with an AudioSourcePlayer and AudioIODevice
    to control playback of an audio file.

    @see AudioSource, AudioSourcePlayer
 */
 class JUCE_API  AudioTransportSource  : public PositionableAudioSource,
                                        public ChangeBroadcaster
 {
 public:
    //==============================================================================
    /** Creates an AudioTransportSource.
        After creating one of these, use the setSource() method to select an input source.
    */
    AudioTransportSource();

    /** Destructor. */
    ~AudioTransportSource();

    //==============================================================================
    /** Sets the reader that is being used as the input source.

        This will stop playback, reset the position to 0 and change to the new reader.

        The source passed in will not be deleted by this object, so must be managed by
        the caller.

        @param newSource                        the new input source to use. This may be a nullptr
        @param readAheadBufferSize              a size of buffer to use for reading ahead. If this
                                                is zero, no reading ahead will be done; if it's
                                                greater than zero, a BufferingAudioSource will be used
                                                to do the reading-ahead. If you set a non-zero value here,
                                                you'll also need to set the readAheadThread parameter.
        @param readAheadThread                  if you set readAheadBufferSize to a non-zero value, then
                                                you'll also need to supply this TimeSliceThread object for
                                                the background reader to use. The thread object must not be
                                                deleted while the AudioTransport source is still using it.
        @param sourceSampleRateToCorrectFor     if this is non-zero, it specifies the sample
                                                rate of the source, and playback will be sample-rate
                                                adjusted to maintain playback at the correct pitch. If
                                                this is 0, no sample-rate adjustment will be performed
        @param maxNumChannels                   the maximum number of channels that may need to be played
    */
    void setSource (PositionableAudioSource* newSource,
                    int readAheadBufferSize = 0,
                    TimeSliceThread* readAheadThread = nullptr,
                    double sourceSampleRateToCorrectFor = 0.0,
                    int maxNumChannels = 2);

    //==============================================================================
    /** Changes the current playback position in the source stream.

        The next time the getNextAudioBlock() method is called, this
        is the time from which it'll read data.

        @see getPosition
    */
    void setPosition (double newPosition);

    /** Returns the position that the next data block will be read from
        This is a time in seconds.
    */
    double getCurrentPosition() const;

    /** Returns the stream's length in seconds. */
    double getLengthInSeconds() const;

    /** Returns true if the player has stopped because its input stream ran out of data. */
    bool hasStreamFinished() const noexcept             { return inputStreamEOF; }

    //==============================================================================
    /** Starts playing (if a source has been selected).

        If it starts playing, this will send a message to any ChangeListeners
        that are registered with this object.
    */
    void start();

    /** Stops playing.

        If it's actually playing, this will send a message to any ChangeListeners
        that are registered with this object.
    */
    void stop();

    /** Returns true if it's currently playing. */
    bool isPlaying() const noexcept     { return playing; }

    //==============================================================================
    /** Changes the gain to apply to the output.
        @param newGain  a factor by which to multiply the outgoing samples,
                        so 1.0 = 0dB, 0.5 = -6dB, 2.0 = 6dB, etc.
    */
    void setGain (float newGain) noexcept;

    /** Returns the current gain setting.
        @see setGain
    */
    float getGain() const noexcept      { return gain; }

    //==============================================================================
    /** Implementation of the AudioSource method. */
    void prepareToPlay (int samplesPerBlockExpected, double sampleRate) override;

    /** Implementation of the AudioSource method. */
    void releaseResources() override;

    /** Implementation of the AudioSource method. */
    void getNextAudioBlock (const AudioSourceChannelInfo&) override;

    //==============================================================================
    /** Implements the PositionableAudioSource method. */
    void setNextReadPosition (int64 newPosition) override;

    /** Implements the PositionableAudioSource method. */
    int64 getNextReadPosition() const override;

    /** Implements the PositionableAudioSource method. */
    int64 getTotalLength() const override;

    /** Implements the PositionableAudioSource method. */
    bool isLooping() const override;

 private:
    //==============================================================================
    PositionableAudioSource* source = nullptr;
    ResamplingAudioSource* resamplerSource = nullptr;
    BufferingAudioSource* bufferingSource = nullptr;
    PositionableAudioSource* positionableSource = nullptr;
    AudioSource* masterSource = nullptr;

    CriticalSection callbackLock;
    float volatile gain = 1.0f, lastGain = 1.0f;
    bool volatile playing = false, stopped = true;
    double sampleRate = 44100.0, sourceSampleRate = 0;
    int blockSize = 128, readAheadBufferSize = 0;
    bool volatile isPrepared = false, inputStreamEOF = false;

    void releaseMasterResources();

    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (AudioTransportSource)
 };

 } // namespace juce