readfile.m

来自「离散多载波传输(DMT)的MATLAB程序及注释」· M 代码 · 共 27 行

function y=readfile(filename)

% %text file input
% 
% fid=fopen(filename,'r');
% F=fread(fid);
% data_samples=char(F');
% % cp=ceil(data_samples/32)*32-data_samples;
% % data_samples=[data_samples,zeros(1,cp)];
% fclose(fid);
% data_in=zeros(1,8*length(data_samples));
%   for i=1:length(data_samples);
%       data_in(1+(i-1)*8:(i-1)*8+8)=eight2bin(data_samples(i));
%   end
% y=data_in;
% 
%     
    %sound file input
    data_samples=wavread(filename);
    %needs to be normalized from -1:1 to 0:255 for 8bit conversion
    data_samples_resized=round(128*data_samples+127);
    data_in=zeros(1,8*length(data_samples_resized));
    for i=1:length(data_samples_resized)
        data_in(1+(i-1)*8:(i-1)*8+8)=eight2bin(data_samples(i));
    end

y=data_in;