#include "Talkthrough.h"
#include <math.h>

#define M_PI 3.14159265358979323846

//--------------------------------------------------------------------------//
// 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
    float krok = 0.00001636246;
    static float tmp = 0;

    int sampleP = sample;
    int sampleL = sample;

    sampleP *= ((cos(tmp)+1)/2);
    sampleL *= ((cos(tmp+M_PI)+1)/2);
    tmp += krok;

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