/* This function calculates the average of values in cBuf */
void updateAverage( INTYPE data)
{
double tempVal = 0;
float mulFactor = 0;
INTYPE oldElement = 0;
if( !stableStream )
{
/* Add data to Buffer */
cBuf.push_back(data);
mulFactor = 1/(double)(cBuf.size());
/* If number of elements in the buffer < total buffer capacity
* Calculate the average using loops */
for(int i = 0; i < (int)cBuf.size(); i++)
{
tempVal += cBuf[i];
}
tempVal = tempVal * mulFactor;
currentAverage = tempVal;
stableStream = (cBuf.size() == cBuf.capacity());
}
else
{
/* Efficient way of calculating average in case the buffer is full
* Every calculation will update the current average value.
* To get new average:
* new_average =
* current_average +
* ( new_element - oldest_element ) * mulFactor
*
* The CircularBuffer at this point is Full
* */
oldElement = cBuf.peek_front();
/* Adding new data Element */
cBuf.push_back(data, OVERWRITE_OLD_DATA);
/* We now have a pointer to the old element in the buffer */
tempVal = currentAverage;
tempVal = tempVal + ( ( data - oldElement ) / ( cBuf.capacity() ) );
currentAverage = tempVal;
}
}
