Récupération de tags mp3

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Contenu du snippet

Récupération des différents tags du fichier MP3 en paramêtre (chemin complet)

- public string getAlbum(string MP3)
- public string getGenre(string MP3)
- public string getArtiste(string MP3)
- public string getTitre(string MP3)

Source / Exemple : 


class MesOutils
    {
        public MesOutils()
        {
        }

        public string getAlbum(string MP3)
        {
            FileStream FS = new FileStream(MP3, FileMode.Open);
            byte[] Buffer = new byte[4];
            int[] nb = new int[4];
            FS.Seek(0, SeekOrigin.Begin);
            FS.Read(Buffer, 0, 3);
            Encoding instEncoding = System.Text.Encoding.GetEncoding(1252);
            string filetype = instEncoding.GetString(Buffer);
            string valTag;
            int fs = 1;
            if (filetype.StartsWith("ID3"))
            {
                FS.Seek(6, SeekOrigin.Begin);
                FS.Read(Buffer, 0, 4);

                nb[3] = Buffer[3] | ((Buffer[2] & 1) << 7);
                nb[2] = ((Buffer[2] >> 1) & 63) | ((Buffer[1] & 3) << 6);
                nb[1] = ((Buffer[1] >> 2) & 31) | ((Buffer[0] & 7) << 5);
                nb[0] = ((Buffer[0] >> 3) & 15);

                ulong FrameSize = 10 + (ulong)nb[3] | ((ulong)nb[2] << 8) | ((ulong)nb[1] << 16) | ((ulong)nb[0] << 24);

                int TagSize = Convert.ToInt32(FrameSize);
                string flag;
                int i = 0;

                while (i < TagSize && fs > 0)
                {
                    i += 10;
                    FS.Seek(i, SeekOrigin.Begin);
                    FS.Read(Buffer, 0, 4);
                    flag = instEncoding.GetString(Buffer);
                    FS.Seek(i + 4, SeekOrigin.Begin);
                    FS.Read(Buffer, 0, 4);
                    fs = Convert.ToInt32(((uint)Buffer[0] << 24) + ((uint)Buffer[1] << 16) + ((uint)Buffer[2] << 8) + ((uint)Buffer[3]));

                    byte[] s = new byte[fs];
                    FS.Seek(i + 10, SeekOrigin.Begin);
                    FS.Read(s, 0, fs);
                    Decoder d = Encoding.GetEncoding("iso-8859-1").GetDecoder();

                    char[] chars = new Char[d.GetCharCount(s, 0, fs)];
                    int charLen = d.GetChars(s, 0, s.Length, chars, 0);

                    valTag = "";
                    for (int j = 0; j < chars.Length; j++)
                    {
                        if (chars[j].ToString() != "\0")
                        {
                            valTag += chars[j].ToString();
                        }
                    }

                    if (flag.CompareTo("TALB") == 0)
                    {
                        FS.Close();
                        return valTag.TrimEnd('\0');
                    }
                    i += fs;
                }
                FS.Close();
                return "";
            }
            else { FS.Close(); return ""; }
        }
        public string getGenre(string MP3)
        {
            FileStream FS = new FileStream(MP3, FileMode.Open);
            byte[] Buffer = new byte[4];
            int[] nb = new int[4];
            FS.Seek(0, SeekOrigin.Begin);
            FS.Read(Buffer, 0, 3);
            Encoding instEncoding = System.Text.Encoding.GetEncoding(1252);
            string filetype = instEncoding.GetString(Buffer);
            string valTag;
            int fs = 1;
            if (filetype.StartsWith("ID3"))
            {
                FS.Seek(6, SeekOrigin.Begin);
                FS.Read(Buffer, 0, 4);

                nb[3] = Buffer[3] | ((Buffer[2] & 1) << 7);
                nb[2] = ((Buffer[2] >> 1) & 63) | ((Buffer[1] & 3) << 6);
                nb[1] = ((Buffer[1] >> 2) & 31) | ((Buffer[0] & 7) << 5);
                nb[0] = ((Buffer[0] >> 3) & 15);

                ulong FrameSize = 10 + (ulong)nb[3] | ((ulong)nb[2] << 8) | ((ulong)nb[1] << 16) | ((ulong)nb[0] << 24);

                int TagSize = Convert.ToInt32(FrameSize);
                string flag;
                int i = 0;

                while (i < TagSize && fs > 0)
                {
                    i += 10;
                    FS.Seek(i, SeekOrigin.Begin);
                    FS.Read(Buffer, 0, 4);
                    flag = instEncoding.GetString(Buffer);
                    FS.Seek(i + 4, SeekOrigin.Begin);
                    FS.Read(Buffer, 0, 4);
                    fs = Convert.ToInt32(((uint)Buffer[0] << 24) + ((uint)Buffer[1] << 16) + ((uint)Buffer[2] << 8) + ((uint)Buffer[3]));

                    byte[] s = new byte[fs];
                    FS.Seek(i + 10, SeekOrigin.Begin);
                    FS.Read(s, 0, fs);
                    Decoder d = Encoding.GetEncoding("iso-8859-1").GetDecoder();

                    char[] chars = new Char[d.GetCharCount(s, 0, fs)];
                    int charLen = d.GetChars(s, 0, s.Length, chars, 0);

                    valTag = "";
                    for (int j = 0; j < chars.Length; j++)
                    {
                        if (chars[j].ToString() != "\0")
                        {
                            valTag += chars[j].ToString();
                        }
                    }

                    if (flag.CompareTo("TCON") == 0)
                    {
                        FS.Close();
                        return valTag.TrimEnd('\0');
                    }
                    i += fs;
                }
                FS.Close();
                return "";
            }
            else { FS.Close(); return ""; }
        }
        public string getArtiste(string MP3)
        {
            FileStream FS = new FileStream(MP3, FileMode.Open);
            byte[] Buffer = new byte[4];
            int[] nb = new int[4];
            FS.Seek(0, SeekOrigin.Begin);
            FS.Read(Buffer, 0, 3);
            Encoding instEncoding = System.Text.Encoding.GetEncoding(1252);
            string filetype = instEncoding.GetString(Buffer);
            string valTag;
            int fs = 1;
            if (filetype.StartsWith("ID3"))
            {
                FS.Seek(6, SeekOrigin.Begin);
                FS.Read(Buffer, 0, 4);

                nb[3] = Buffer[3] | ((Buffer[2] & 1) << 7);
                nb[2] = ((Buffer[2] >> 1) & 63) | ((Buffer[1] & 3) << 6);
                nb[1] = ((Buffer[1] >> 2) & 31) | ((Buffer[0] & 7) << 5);
                nb[0] = ((Buffer[0] >> 3) & 15);

                ulong FrameSize = 10 + (ulong)nb[3] | ((ulong)nb[2] << 8) | ((ulong)nb[1] << 16) | ((ulong)nb[0] << 24);

                int TagSize = Convert.ToInt32(FrameSize);
                string flag;
                int i = 0;

                while (i < TagSize && fs > 0)
                {
                    i += 10;
                    FS.Seek(i, SeekOrigin.Begin);
                    FS.Read(Buffer, 0, 4);
                    flag = instEncoding.GetString(Buffer);
                    FS.Seek(i + 4, SeekOrigin.Begin);
                    FS.Read(Buffer, 0, 4);
                    fs = Convert.ToInt32(((uint)Buffer[0] << 24) + ((uint)Buffer[1] << 16) + ((uint)Buffer[2] << 8) + ((uint)Buffer[3]));

                    byte[] s = new byte[fs];
                    FS.Seek(i + 10, SeekOrigin.Begin);
                    FS.Read(s, 0, fs);
                    Decoder d = Encoding.GetEncoding("iso-8859-1").GetDecoder();

                    char[] chars = new Char[d.GetCharCount(s, 0, fs)];
                    int charLen = d.GetChars(s, 0, s.Length, chars, 0);

                    valTag = "";
                    for (int j = 0; j < chars.Length; j++)
                    {
                        if (chars[j].ToString() != "\0")
                        {
                            valTag += chars[j].ToString();
                        }
                    }

                    if (flag.CompareTo("TPE1") == 0)
                    {
                        FS.Close();
                        return valTag.TrimEnd('\0');
                    }
                    i += fs;
                }
                FS.Close();
                return "";
            }
            else { FS.Close(); return ""; }
        }
        public string getTitre(string MP3)
        {
            FileStream FS = new FileStream(MP3, FileMode.Open);
            byte[] Buffer = new byte[4];
            int[] nb = new int[4];
            FS.Seek(0, SeekOrigin.Begin);
            FS.Read(Buffer, 0, 3);
            Encoding instEncoding = System.Text.Encoding.GetEncoding(1252);
            string filetype = instEncoding.GetString(Buffer);
            string valTag;
            int fs = 1;
            if (filetype.StartsWith("ID3"))
            {
                FS.Seek(6, SeekOrigin.Begin);
                FS.Read(Buffer, 0, 4);

                nb[3] = Buffer[3] | ((Buffer[2] & 1) << 7);
                nb[2] = ((Buffer[2] >> 1) & 63) | ((Buffer[1] & 3) << 6);
                nb[1] = ((Buffer[1] >> 2) & 31) | ((Buffer[0] & 7) << 5);
                nb[0] = ((Buffer[0] >> 3) & 15);

                ulong FrameSize = 10 + (ulong)nb[3] | ((ulong)nb[2] << 8) | ((ulong)nb[1] << 16) | ((ulong)nb[0] << 24);

                int TagSize = Convert.ToInt32(FrameSize);
                string flag;
                int i = 0;

                while (i < TagSize && fs > 0)
                {
                    i += 10;
                    FS.Seek(i, SeekOrigin.Begin);
                    FS.Read(Buffer, 0, 4);
                    flag = instEncoding.GetString(Buffer);
                    FS.Seek(i + 4, SeekOrigin.Begin);
                    FS.Read(Buffer, 0, 4);
                    fs = Convert.ToInt32(((uint)Buffer[0] << 24) + ((uint)Buffer[1] << 16) + ((uint)Buffer[2] << 8) + ((uint)Buffer[3]));

                    byte[] s = new byte[fs];
                    FS.Seek(i + 10, SeekOrigin.Begin);
                    FS.Read(s, 0, fs);
                    Decoder d = Encoding.GetEncoding("iso-8859-1").GetDecoder();

                    char[] chars = new Char[d.GetCharCount(s, 0, fs)];
                    int charLen = d.GetChars(s, 0, s.Length, chars, 0);

                    valTag = "";
                    for (int j = 0; j < chars.Length; j++)
                    {
                        if (chars[j].ToString() != "\0")
                        {
                            valTag += chars[j].ToString();
                        }
                    }

                    if (flag.CompareTo("TIT2") == 0)
                    {
                        FS.Close();
                        return valTag.TrimEnd('\0');
                    }
                    i += fs;
                }
                FS.Close();
                return "";
            }
            else { FS.Close(); return ""; }
        }
    }

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