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    for (dx = 0; dx < downSamplingFactor; dx++)
            {
                int16_t a_x = inputXQpel_00 * (downSamplingFactor - dx) + inputXQpel_04 * dx;
                int16_t b_x = inputXQpel_40 * (downSamplingFactor - dx) + inputXQpel_44 * dx;

                int16_t a_y = inputYQpel_00 * (downSamplingFactor - dx) + inputYQpel_04 * dx;
                int16_t b_y = inputYQpel_40 * (downSamplingFactor - dx) + inputYQpel_44 * dx;

                for (dy = 0; dy < downSamplingFactor; dy++)
                {

                    int16_t inputQpelX = (a_x * (downSamplingFactor - dy) + b_x * dy) / (downSamplingFactor*downSamplingFactor);
                    int16_t inputQpelY = (a_y * (downSamplingFactor - dy) + b_y * dy) / (downSamplingFactor*downSamplingFactor);
                }
            }