highPass

#include "HighPassFilter.h"

extern queue<unsigned char> in2HighPassQueue;
extern concurrent_vector<short> highPass2ClipQueue;

RetVal HighPassFilter(float alpha)
{
    // input data
    static short xCurr = 0;
    static short xPrev = 0;

    // output data
    static short yCurr = 0;
    static short yPrev = 0;

    // filterring
    while(!in2HighPassQueue.empty())
    {
        xPrev = xCurr;
        xCurr = in2HighPassQueue.front();
        in2HighPassQueue.pop();

        yPrev = yCurr;
        yCurr = alpha * (yPrev + xCurr - xPrev);

        highPass2ClipQueue.push_back(yCurr);
    }

    return RET_OK;
}


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#ifndef _HIGH_PASS_FILTER_H_
#define _HIGH_PASS_FILTER_H_

#include <queue>
#include "tbb/concurrent_vector.h"
#include "defines.h"

using namespace std;
using namespace tbb;

RetVal HighPassFilter(float alpha);

#endif