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: dsss_enc.m
    path of file: ./repos/audio-steganography-algorithms/01-Spread-Spectrum/01-DSSS-Conventional-Algorithm
    
    the code of the file until where you have to start completion: function out = dsss_enc(signal, text, L_min, graf)
%DSSS_ENC is the function to hide data in audio using "conventional"

    
function out = dsss_enc(signal, text, L_min, graf)
%DSSS_ENC is the function to hide data in audio using "conventional"
%   Direct Sequence Spread Spectrum technique in time domain. 
%
%   INPUTS VARIABLES
%       signal : Cover signal
%       text   : Message to hide
%       L_min  : Minimum segment length
%       graf   : Plots after processing (graf=0 not to plot)
%
%   OUTPUTS VARIABLES
%       out    : Stego signal
%
%   Kadir Tekeli (kadir.tekeli@outlook.com)

if nargin < 3
    L_min = 8*1024;  %Setting a minimum value for segment length
end