virtual void factofits::DrsOffsetCalibrate ( char *  target_location )

inlinevirtual

Apply the drs offset calibration (overload of super-method)

Reimplemented from zofits.

Definition at line 311 of file factofits.h.

References data, fDataOffset, fNumSlices, fOffsetCalibration, fStartCellsOffset, and IsOffsetCalibration().

        {
            if (!IsOffsetCalibration())
                return;

            const int16_t* startCell = reinterpret_cast<int16_t*>(target_location + fStartCellsOffset);
            int16_t*       data      = reinterpret_cast<int16_t*>(target_location + fDataOffset);

            for (uint32_t ch=0; ch<1440; ch++)
            {
                if (startCell[ch] < 0)
                {
                    data += fNumSlices;
                    continue;
                }

                const int16_t modStart = startCell[ch]%1024;
                const int16_t *off     = fOffsetCalibration.data() + ch*1024;

                const int16_t* cal        = off+modStart;
                const int16_t* end_stride = data+fNumSlices;

                if (modStart+fNumSlices > 1024)
                {
                    while (cal < off+1024)
                        *data++ -= *cal++;
                    cal = off;
                }

                while (data<end_stride)
                    *data++ -= *cal++;
            }
        }

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