{
guint j;
register double squaresum = 0.0;
/*
* process data here
* input sample data enters in *in_data as 8 or 16 bit data
* samples for left and right channel are interleaved
*/
for (j = 0; j < num_samples; j++)
squaresum += data[j] * data[j];
return (squaresum / (float) num_samples);
}