// file: $ECE_8993/util/calculate_lpc/v1.0/clpc_comp_4.cc
//
// debias a data set (mean subtraction)
//

// isip include files
//
#include <integral.h>
#include <integral_constants.h>

// local include files
//
#include "calculate_lpc.h"

#include "calculate_lpc_constants.h"

// function: debias_cc
//
// arguments:
//
//  float_4* data: (input) a single channel of sampled data
//  int_4 num_samples: (input) number of samples in the data stream
//  
// return value: a logical_1 indicating status
//
// this function subtracts the mean sample value from each sample and
//
logical_1 debias_cc(float_4* data_a, int_4 num_samples_a) {

  // find the average value of the data
  //
  float_4 average = (float_4)0.0;
  for (int_4 i = 0; i < num_samples_a; i++) {

    // add this sample value to the sum
    //
    average += data_a[i];
  }
  average /= (float_4)num_samples_a;

  // subtract the mean from each sample
  //
  for (int_4 i = 0; i < num_samples_a; i++) {

    // add this sample value to the sum
    //
    data_a[i] -= average;
  }

  
  // exit gracefully
  //
  return ISIP_TRUE;
}