JUCE/modules/juce_audio_devices/native/juce_ios_Audio.h

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

   This file is part of the JUCE library.
   Copyright (c) 2016 - ROLI Ltd.

   Permission is granted to use this software under the terms of the ISC license
   http://www.isc.org/downloads/software-support-policy/isc-license/

   Permission to use, copy, modify, and/or distribute this software for any
   purpose with or without fee is hereby granted, provided that the above
   copyright notice and this permission notice appear in all copies.

   THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH REGARD
   TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
   FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT,
   OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
   USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
   TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
   OF THIS SOFTWARE.

   -----------------------------------------------------------------------------

   To release a closed-source product which uses other parts of JUCE not
   licensed under the ISC terms, commercial licenses are available: visit
   www.juce.com for more information.

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

#pragma once

class 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                             { return isRunning && callback != nullptr; }
    bool isOpen() override                                { return isRunning; }
    String getLastError() override                        { return lastError; };

    //==============================================================================
    StringArray getOutputChannelNames() override          { return { "Left", "Right" }; }
    StringArray getInputChannelNames() override           { return audioInputIsAvailable ? getOutputChannelNames() : StringArray(); }
    int getDefaultBufferSize() override                   { return defaultBufferSize; }
    int getCurrentBufferSizeSamples() override            { return actualBufferSize; }
    double getCurrentSampleRate() override                { return sampleRate; }
    int getCurrentBitDepth() override                     { return 16; }
    BigInteger getActiveOutputChannels() const override   { return activeOutputChans; }
    BigInteger getActiveInputChannels() const override    { return activeInputChans; }
    int getOutputLatencyInSamples() override;
    int getInputLatencyInSamples() override;

    //==============================================================================
    void handleStatusChange (bool enabled, const char* reason);
    void handleRouteChange (const char* reason);

    //==============================================================================
    virtual void setMidiMessageCollector (MidiMessageCollector* collector)     { messageCollector = collector; }
    virtual AudioPlayHead* getAudioPlayHead() const;

    //==============================================================================
    virtual bool isInterAppAudioConnected() const                              { return interAppAudioConnected; }
   #if JUCE_MODULE_AVAILABLE_juce_graphics
    virtual Image getIcon (int size);
   #endif
    virtual void switchApplication();
private:
    //==============================================================================
    void updateSampleRateAndAudioInput();

    //==============================================================================
    friend class iOSAudioIODeviceType;
    iOSAudioIODevice (const String& deviceName);

    //==============================================================================
    const int defaultBufferSize;
    double sampleRate;
    int numInputChannels, numOutputChannels;
    int preferredBufferSize, actualBufferSize;
    bool isRunning;
    String lastError;

    bool audioInputIsAvailable, interAppAudioConnected;
    BigInteger activeOutputChans, activeInputChans;

    AudioIODeviceCallback* callback;
    MidiMessageCollector* messageCollector;

    class Pimpl;
    friend class Pimpl;
    ScopedPointer<Pimpl> pimpl;

    JUCE_DECLARE_NON_COPYABLE (iOSAudioIODevice)
};