Function aggregateArrayCounts

src/ir_DistanceWidthProtocol.hpp:155–191

* We count all consecutive (allow only one gap between) durations and compute the average. * @return false if more than 2 distinct duration values found */

 * @return false if more than 2 distinct duration values found
 */
bool aggregateArrayCounts(uint8_t aArray[], uint8_t aMaxIndex, uint8_t *aShortIndex, uint8_t *aLongIndex) {
    uint8_t tSum = 0;
    uint16_t tWeightedSum = 0;
    uint8_t tGapCount = 0;
    for (uint_fast8_t i = 0; i <= aMaxIndex; i++) {
        uint8_t tCurrentDurations = aArray[i];
        if (tCurrentDurations != 0) {
            // Add it to sum and remove array content
            tSum += tCurrentDurations;
            tWeightedSum += (tCurrentDurations * i);
            aArray[i] = 0;
            tGapCount = 0;
        } else {
            tGapCount++;
        }
        if (tSum != 0 && (i == aMaxIndex || tGapCount > 1)) {
            /*
             * Here we have a sum AND last element OR more than 1 consecutive gap
             */
            uint8_t tAggregateIndex = (tWeightedSum + (tSum / 2)) / tSum; // with rounding
            aArray[tAggregateIndex] = tSum; // disabling this line increases code size by 2 - unbelievable!
            // store aggregate for later decoding
            if (*aShortIndex == 0) {
                *aShortIndex = tAggregateIndex;
            } else if (*aLongIndex == 0) {
                *aLongIndex = tAggregateIndex;
            } else {
                // we have 3 bins => this is likely no pulse width or distance protocol. e.g. it can be RC5.
                return false;
            }
            // initialize for next aggregation
            tSum = 0;
            tWeightedSum = 0;
        }
    }
    return true;
}

/*
 * Try to decode a pulse distance or pulse width protocol.