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

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 */