/*
     File: AudioDevice.h 
 Adapted from the CAPlayThough example
  Version: 1.2.2 
  
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 Copyright (C) 2013 Apple Inc. All Rights Reserved.
 Copyright (C) 2017 René J.V. Bertin All Rights Reserved.
  
*/

#ifndef __AudioDevice_h__
#define __AudioDevice_h__

#include <CoreServices/CoreServices.h>
#include <CoreAudio/CoreAudio.h>
#include <AvailabilityMacros.h>

#ifndef DEPRECATED_LISTENER_API
#   if !(defined(MAC_OS_X_VERSION_10_11) && MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_11)
#       define DEPRECATED_LISTENER_API 1
#       warning "Using the deprecated PropertyListener API; at least it works"
#   endif
#endif

#if DEPRECATED_LISTENER_API
using AudioPropertyListenerProc = AudioDevicePropertyListenerProc;
#else
using AudioPropertyListenerProc = AudioObjectPropertyListenerProc;
#endif

class AudioDeviceList;

class AudioDevice {
public:

    typedef void (DefaultDeviceChangeHandler)(AudioObjectID newID, void *data);

    AudioDevice();
    AudioDevice(AudioObjectID devid, bool isInput=false);
    AudioDevice(AudioObjectID devid, bool quick, bool isInput);
    AudioDevice(AudioObjectID devid, AudioPropertyListenerProc lProc, bool isInput=false);
    ~AudioDevice();

    void Init();
    void Init(AudioPropertyListenerProc lProc);

    bool Valid() { return mID != kAudioDeviceUnknown; }

    void SetBufferSize(UInt32 size);
    OSStatus NominalSampleRate(Float64 &sampleRate);
    inline Float64 ClosestNominalSampleRate(Float64 sampleRate);
    OSStatus SetNominalSampleRate(Float64 sampleRate, bool force=false);
    OSStatus ResetNominalSampleRate(bool force=false);
    OSStatus SetStreamBasicDescription(AudioStreamBasicDescription *desc);
    int CountChannels();
    char *GetName(char *buf=NULL, UInt32 maxlen=0);

    void SetInitialNominalSampleRate(Float64 sampleRate)
    {
        mInitialFormat.mSampleRate = sampleRate;
    }

    Float64 CurrentNominalSampleRate()
    {
        return currentNominalSR;
    }

    AudioObjectID ID()
    {
        return mID;
    }

    bool isDefaultDevice()
    {
        return mDefaultDevice;
    }
    void setDefaultDevice(bool isDefault)
    {
        mDefaultDevice = isDefault;
    }

    void installDefaultDeviceChangeHandler(DefaultDeviceChangeHandler *handler, void *data);
    void callDefaultDeviceChangeHandler(AudioObjectID newID);

    static AudioDevice *GetDefaultDevice(bool forInput, OSStatus &err, AudioDevice *dev=NULL);
    static AudioDevice *GetDevice(AudioObjectID devId, bool forInput, AudioDevice *dev=NULL, bool quick=false);

protected:
    AudioStreamBasicDescription mInitialFormat;
    AudioPropertyListenerProc listenerProc;
    OSStatus GetPropertyDataSize( AudioObjectPropertySelector property, UInt32 *size, AudioObjectPropertyAddress *propertyAddress=NULL );
    Float64 currentNominalSR;
    Float64 minNominalSR, maxNominalSR;
    UInt32 nominalSampleRates;
    Float64 *nominalSampleRateList = NULL;
    bool discreteSampleRateList;
    const AudioObjectID mID;
    const bool mForInput;
    UInt32 mSafetyOffset;
    UInt32 mBufferSizeFrames;
    AudioStreamBasicDescription mFormat;
    char mDevName[256] = "";

    bool mInitialised = false;
    bool mDefaultDevice = false;

    DefaultDeviceChangeHandler *defDeviceChangeHandler = nullptr;
    void *defDeviceChangeHanderData = nullptr;

private:
    bool gettingDevName = false;

friend class AudioDeviceList;

public:
    UInt32 listenerSilentFor;
};


#endif // __AudioDevice_h__