//
// libtgvoip is free and unencumbered public domain software.
// For more information, see http://unlicense.org or the UNLICENSE file
// you should have received with this source code distribution.
//

#ifndef LIBTGVOIP_AUDIOUNITIO_H
#define LIBTGVOIP_AUDIOUNITIO_H

#include "../../audio/AudioIO.h"
#include "../../threading.h"
#include <AudioToolbox/AudioToolbox.h>
#include <AudioUnit/AudioUnit.h>
#include <atomic>
#include <string>

namespace tgvoip
{
namespace audio
{
    class AudioInputAudioUnit;
    class AudioOutputAudioUnit;

    class AudioUnitIO : public AudioIO
    {
    public:
        AudioUnitIO(std::string inputDeviceID, std::string outputDeviceID);
        ~AudioUnitIO();
        void EnableInput(bool enabled);
        void EnableOutput(bool enabled);
        virtual AudioInput* GetInput();
        virtual AudioOutput* GetOutput();
#if TARGET_OS_OSX
        void SetCurrentDevice(bool input, std::string deviceID);
        void SetDuckingEnabled(bool enabled);
#endif

    private:
        static OSStatus BufferCallback(void* inRefCon, AudioUnitRenderActionFlags* ioActionFlags, const AudioTimeStamp* inTimeStamp, UInt32 inBusNumber, UInt32 inNumberFrames, AudioBufferList* ioData);
        void BufferCallback(AudioUnitRenderActionFlags* ioActionFlags, const AudioTimeStamp* inTimeStamp, UInt32 bus, UInt32 numFrames, AudioBufferList* ioData);
        void StartIfNeeded();
#if TARGET_OS_OSX
        static OSStatus DefaultDeviceChangedCallback(AudioObjectID inObjectID, UInt32 inNumberAddresses, const AudioObjectPropertyAddress* inAddresses, void* inClientData);
        std::string currentInputDevice;
        std::string currentOutputDevice;
        bool duckingEnabled = true;
#ifndef TGVOIP_NO_OSX_PRIVATE_API
        bool actualDuckingEnabled = true;
#endif // TGVOIP_NO_OSX_PRIVATE_API
        AudioDeviceID currentOutputDeviceID;
#endif
        AudioComponentInstance unit;
        AudioInputAudioUnit* input;
        AudioOutputAudioUnit* output;
        AudioBufferList inBufferList;
        std::atomic<bool> inputEnabled;
        std::atomic<bool> outputEnabled;
        bool started;
    };
}
}

#endif /* LIBTGVOIP_AUDIOUNITIO_H */