/*
SoLoud audio engine
Copyright (c) 2013-2015 Jari Komppa

This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.

Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:

   1. The origin of this software must not be misrepresented; you must not
   claim that you wrote the original software. If you use this software
   in a product, an acknowledgment in the product documentation would be
   appreciated but is not required.

   2. Altered source versions must be plainly marked as such, and must not be
   misrepresented as being the original software.

   3. This notice may not be removed or altered from any source
   distribution.
*/

#ifndef SOLOUD_FFTFILTER_H
#define SOLOUD_FFTFILTER_H

#include "soloud.h"

namespace SoLoud
{
	class FFTFilter;

	class FFTFilterInstance : public FilterInstance
	{
		float *mTemp;
		float *mInputBuffer;
		float *mMixBuffer;
		float *mLastPhase;
		float *mSumPhase;
		unsigned int mInputOffset[MAX_CHANNELS];
		unsigned int mMixOffset[MAX_CHANNELS];
		unsigned int mReadOffset[MAX_CHANNELS];
		FFTFilter *mParent;
	public:
		virtual void fftFilterChannel(float *aFFTBuffer, unsigned int aSamples, float aSamplerate, time aTime, unsigned int aChannel, unsigned int aChannels);
		virtual void filterChannel(float *aBuffer, unsigned int aSamples, float aSamplerate, time aTime, unsigned int aChannel, unsigned int aChannels);
		virtual ~FFTFilterInstance();
		FFTFilterInstance(FFTFilter *aParent);
		FFTFilterInstance();
		void comp2MagPhase(float* aFFTBuffer, unsigned int aSamples);
		void magPhase2MagFreq(float* aFFTBuffer, unsigned int aSamples, float aSamplerate, unsigned int aChannel);
		void magFreq2MagPhase(float* aFFTBuffer, unsigned int aSamples, float aSamplerate, unsigned int aChannel);
		void magPhase2Comp(float* aFFTBuffer, unsigned int aSamples);
		void init();
	};

	class FFTFilter : public Filter
	{
	public:
		virtual FilterInstance *createInstance();
		FFTFilter();
	};
}

#endif