//
// 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_ECHOCANCELLER_H
#define LIBTGVOIP_ECHOCANCELLER_H

#include "tools/threading.h"
#include "tools/Buffers.h"
#include "tools/BlockingQueue.h"
#include "controller/media/MediaStreamItf.h"
#include "tools/utils.h"

namespace webrtc
{
class AudioProcessing;
class AudioFrame;
} // namespace webrtc

namespace tgvoip
{
class EchoCanceller
{

public:
	TGVOIP_DISALLOW_COPY_AND_ASSIGN(EchoCanceller);
	EchoCanceller(bool enableAEC, bool enableNS, bool enableAGC);
	virtual ~EchoCanceller();
	virtual void Start();
	virtual void Stop();
	void SpeakerOutCallback(unsigned char *data, size_t len);
	void Enable(bool enabled);
	void ProcessInput(int16_t *inOut, size_t numSamples, bool &hasVoice);
	void SetAECStrength(int strength);
	void SetVoiceDetectionEnabled(bool enabled);

private:
	bool enableAEC;
	bool enableAGC;
	bool enableNS;
	bool enableVAD = false;
	bool isOn;
#ifndef TGVOIP_NO_DSP
	webrtc::AudioProcessing *apm = NULL;
	webrtc::AudioFrame *audioFrame = NULL;
	void RunBufferFarendThread();
	bool didBufferFarend;
	Thread *bufferFarendThread;
	BlockingQueue<Buffer> *farendQueue;
	BufferPool<960 * 2, 10> farendBufferPool;
	bool running;
#endif
};

namespace effects
{

class AudioEffect
{
public:
	virtual ~AudioEffect() = 0;
	virtual void Process(int16_t *inOut, size_t numSamples) = 0;
	virtual void SetPassThrough(bool passThrough);

protected:
	bool passThrough = false;
};

class Volume : public AudioEffect
{
public:
	Volume();
	virtual ~Volume();
	virtual void Process(int16_t *inOut, size_t numSamples);
	/**
	* Level is (0.0, 2.0]
	*/
	void SetLevel(float level);
	float GetLevel();

private:
	float level = 1.0f;
	float multiplier = 1.0f;
};

} // namespace effects
} // namespace tgvoip

#endif //LIBTGVOIP_ECHOCANCELLER_H