Again, for anyone working with ID3 version 1 or 1.1 tags.
This class is used to store the tags associated with a given file.
There is a default constructor in case you need to instantiate an 'empty' instance, but in 99% of cases you pass the filename of the audio file to the constuctor and it'll return an instance with the correct tags and filename all neatly packaged up for you.
Enjoy!
using System.IO;
using System.Text;
namespace DGRP
{
public class MP3File
{
#region Private fields
private string artist = "";
private string title = "";
private string album = "";
private string year = "0000";
private string comment = "";
private byte track = 0;
private byte genre = 255;
private string fname = "";
#endregion
#region Accessors
public string Filename
{
get
{
return fname;
}
set
{
fname = value;
}
}
public string Artist
{
get
{
return artist;
}
set
{
artist = value.Trim();
}
}
public string Title
{
get
{
return title;
}
set
{
title = value.Trim();
}
}
public string Album
{
get
{
return album;
}
set
{
album = value.Trim();
}
}
public string Year
{
get
{
return year;
}
set
{
string tmpStr = value.Trim();
if (tmpStr == "") tmpStr = "0000";
year = tmpStr;
}
}
public string Comment
{
get
{
return comment;
}
set
{
comment = value.Trim();
}
}
public byte Track
{
get
{
return track;
}
set
{
track = value;
}
}
public byte GenreIndex
{
get
{
return genre;
}
set
{
genre = (value>148)?(byte)255:value;
}
}
public string GenreName
{
get
{
return Genre.Type[genre];
}
set
{
genre = Genre.Type[value];
}
}
#endregion
#region Constructors
public MP3File() {}
public MP3File(string fName)
{
ReadTags(fName);
}
#endregion
public void ReadTags(string fName)
{
FileInfo fi = new FileInfo(fName);
if (fi.Length < 129)
{
this.Filename = fi.FullName;
return;
}
// Test for version 1 Tags
FileStream fs = new FileStream(fi.FullName, FileMode.Open, FileAccess.Read);
fs.Seek(-128, SeekOrigin.End);
byte[] tagTest = new byte[3];
tagTest[0] = (byte)fs.ReadByte();
tagTest[1] = (byte)fs.ReadByte();
tagTest[2] = (byte)fs.ReadByte();
if (Encoding.ASCII.GetString(tagTest) == "TAG")
{
// Found version 1 tags
byte[] tag = new byte[125];
fs.Read(tag, 0, 125);
byte[] artistTag = new byte[30];
byte[] titleTag = new byte[30];
byte[] albumTag = new byte[30];
byte[] yearTag = new byte[4];
byte[] commentTag = new byte[30];
for (int i = 0; i < 30; i++)
{
titleTag[i] = tag[i];
artistTag[i] = tag[i + 30];
albumTag[i] = tag[i + 60];
if (i < 29) commentTag[i] = tag[i + 94];
if (i < 4) yearTag[i] = tag[i + 90];
}
// if this is a version 1.0 tag, convert to version 1.1 and set the track number to 0 .
if (tag[122] != 0)
{
tag[122] = 0;
tag[123] = 0;
}
byte trackTag = tag[123];
byte genreTag = tag[124];
this.Artist = (Encoding.ASCII.GetString(artistTag)).Replace("\0", "");
this.Title = (Encoding.ASCII.GetString(titleTag)).Replace("\0", "");
this.Album = (Encoding.ASCII.GetString(albumTag)).Replace("\0", "");
this.Year = (Encoding.ASCII.GetString(yearTag)).Replace("\0", "");
this.Comment = (Encoding.ASCII.GetString(commentTag)).Replace("\0", "");
this.Track = trackTag;
this.GenreIndex = genreTag;
}
this.Filename = fi.FullName;
}
}
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