// file: $SPEECH_HOMEWORK4/hw4/class/snr_ratio/v1.0/snr_find_0.cc
//

// isip include files
//
#include "signal_noise_ratio.h"
#include "signal_noise_ratio_constants.h"

// method: find_range_cc
//
// arguments:
//  float_4** energy (input) the energy data
//  int_4 num_energy (input) the number of energy
//  float_4* min (output) minimum value of energy
//  float_4* max (output) maximum value of energy
//
// return: a logical_1 indicating status
//
logical_1 Signal::find_range_cc (float_4** energy_a, int_4 num_energy_a,
				 float_4* min_a, float_4* max_a) {

  // check arguments
  //
  if (energy_a == (float_4**)NULL) {
    error_handler_cc((char_1*)"find_range_cc",
		     (char_1*)"input data is empty");
  }

  // loop over all channels
  //
  for (int_4 channel=0;channel < num_chans_d; channel++) {
    
    min_a[channel] = energy_a[0][channel];
    max_a[channel] = energy_a[0][channel];
    
    // loop over all samples
    //
    for (int_4 sample=1;sample<num_energy_a;sample++) {
      
      float_4 n = energy_a[sample][channel];
      
      // compare with min and max
      //
      if (n < min_a[channel]) {
	min_a[channel] = n;
      }
      else if (n > max_a[channel]) {
	max_a[channel] = n;
      }
    }
  }
      
  // exit gracefully
  //
  return ISIP_TRUE;
  
}