pair<vector<float>, vector<float> > StateMachineFeedback::AverageCurrents ( const int16_t *  ptr, int  n  )

inlineprivate

Definition at line 174 of file feedback.cc.

References i, and BIAS::kNumChannels.

    {
        if (fCursorCur++>=0)
        {
            for (int i=0; i<BIAS::kNumChannels; i++)
            {
                fCurrentsAvg[i] += ptr[i];
                fCurrentsRms[i] += ptr[i]*ptr[i];
            }
        }

        if (fCursorCur<n)
            return make_pair(vector<float>(), vector<float>());

        const double conv = 5e-3/4096;

        vector<float> rms(BIAS::kNumChannels);
        vector<float> avg(BIAS::kNumChannels);
        for (int i=0; i<BIAS::kNumChannels; i++)
        {
            avg[i]  = double(fCurrentsAvg[i])/fCursorCur * conv;
            rms[i]  = double(fCurrentsRms[i])/fCursorCur * conv * conv;
            rms[i] -= avg[i]*avg[i];
            rms[i]  = rms[i]<0 ? 0 : sqrt(rms[i]);
        }

        return make_pair(avg, rms);
    }