#include "Talkthrough.h"
#include "math.h"
#define X 9600 //0,2s

int buffer[X];
int i=0;
float depth= 0.1;

//--------------------------------------------------------------------------//
// Function:	Process_Data()												//
//																			//
// Description: This function is called from inside the SPORT0 ISR every 	//
//				time a complete audio frame has been received. The new 		//
//				input samples can be found in the variables iChannel0LeftIn,//
//				iChannel0RightIn, iChannel1LeftIn and iChannel1RightIn 		//
//				respectively. The processed	data should be stored in 		//
//				iChannel0LeftOut, iChannel0RightOut, iChannel1LeftOut,		//
//				iChannel1RightOut, iChannel2LeftOut and	iChannel2RightOut	//
//				respectively.												//
//--------------------------------------------------------------------------//
void Process_Data(void)
{
	int sampleLeft=iChannel0LeftIn<<8;
	int sampleRight=iChannel0RightIn<<8;
	int sample =(sampleLeft+sampleRight)/2;

	//student's code here

	//echo

	int y = sample;
	sample =buffer[i]+sample;
	buffer[i]=y;
	i++;

	if(i>X)
	{
		i=0;
	}


	float modSignal = (1 - depth) + depth * sin(3.14*(i-X)/X);
	//float modSignal = sin(3.14*(i-X)/X);

	sample = sample*modSignal; // efekt tremolo




	//postprocessing
	sample=sample>>8;
    iChannel0LeftOut = sample;
	iChannel0RightOut = sample;
	iChannel1LeftOut = sample;
	iChannel1RightOut = sample;
}