You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: composite.m
    path of file: ./repos/DeepXi/deepxi
    
    the code of the file until where you have to start completion: function [Csig,Cbak,Covl]= composite(cleanFile, enhancedFile, f_s);
% ----------------------------------------------------------------------
%          Composite Objective Speech Quality Measure
%
%   This function implements the composite objective measure proposed in
%   [1].
%
%   Usage:  [sig,bak,ovl]=composite(cleanFile.wav, enhancedFile.wav)
%
    
function [overall_snr, segmental_snr] = snr(clean_speech, processed_speech,sample_rate)

% ----------------------------------------------------------------------
% Check the length of the clean and processed speech.  Must be the same.
% ----------------------------------------------------------------------

clean_length      = length(clean_speech);
processed_length  = length(processed_speech);

if (clean_length ~= processed_length)
  disp('Error: Both Speech Files must be same length.');
  return
end