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: audioload.m
    path of file: ./repos/audio-steganography-algorithms/00-AudioReader&Writer
    
    the code of the file until where you have to start completion: function file = audioload()
%AUDIOLOAD() is a combination of several audioreaders.
%   It supports .WAV .FLAC .MP3 .M4A .AAC .OGG .OGA types. Important
%   information such as data part, samplerate, bitrate, quality is stored
%   in a structure to be used later on. File structure will be necessary
%   for audiosave() function.
%
%   Kadir Tekeli (kadir.tekeli@outlook.com)

message = 'Select audio file.';
type1 = '*.wav; *.flac;'; type2 = '*.mp3;';
type3 = '*.m4a; *.aac;'; type4 = '*.ogg; *.oga,';

[FileName,PathName] = uigetfile({[type1 type2 type3 type4]}, message);
[file.path,file.name,file.ext] = fileparts([PathName FileName]);

if ~isempty(strfind(type1, file.ext))
	[file.data, file.fs] = audioread([PathName FileName]);
	finfo = audioinfo([PathName FileName]);
	file.nbit = finfo.BitsPerSample;
elseif ~isempty(strfind(type2, file.ext))
	[file.data,file.fs,file.bitrate] = mp3read([PathName FileName]);

    
function file = audioload()
%AUDIOLOAD() is a combination of several audioreaders.
%   It supports .WAV .FLAC .MP3 .M4A .AAC .OGG .OGA types. Important
%   information such as data part, samplerate, bitrate, quality is stored
%   in a structure to be used later on. File structure will be necessary
%   for audiosave() function.
%
%   Kadir Tekeli (kadir.tekeli@outlook.com)

message = 'Select audio file.';
type1 = '*.wav; *.flac;'; type2 = '*.mp3;';
type3 = '*.m4a; *.aac;'; type4 = '*.ogg; *.oga,';

[FileName,PathName] = uigetfile({[type1 type2 type3 type4]}, message);
[file.path,file.name,file.ext] = fileparts([PathName FileName]);

if ~isempty(strfind(type1, file.ext))
	[file.data, file.fs] = audioread([PathName FileName]);
	finfo = audioinfo([PathName FileName]);
	file.nbit = finfo.BitsPerSample;
elseif ~isempty(strfind(type2, file.ext))
	[file.data,file.fs,file.bitrate] = mp3read([PathName FileName]);
elseif ~isempty(strfind(type3, file.ext))
	[file.data, file.fs] = audioread([PathName FileName]);
	finfo = audioinfo([PathName FileName]);
	file.bitrate = finfo.BitRate;
elseif ~isempty(strfind(type4, file.ext))
	[file.data, file.fs] = audioread([PathName FileName]);
	file.quality = 75;
else
	error('File format is not supported!');
end