RemoveBlock() public method

Removes a specified block of data from the file represented by the current instance.
public RemoveBlock ( long start, long length ) : void
start long /// A value specifying at which point to /// remove data. ///
length long /// A value specifying the number of /// bytes to remove. ///
return void
File Class Documentation
Ejemplo n.º 1
0
        private static void RemoveLyrics(TagLib.File mp3File)
        {
            var        maxLength  = 512;
            ByteVector initVector = new ByteVector(Encoding.UTF8.GetBytes("LYRICSBEGIN"));
            long       initOffset = mp3File.Find(initVector, startPosition: 0);

            if ((initOffset != -1))
            {
                // The Lyrics3 block can end with one of these two markups, so we need to evaluate both.
                foreach (string str in new[] { "LYRICS200", "LYRICSEND" })
                {
                    ByteVector endVector = new ByteVector(Encoding.UTF8.GetBytes(str));
                    long       endOffset = mp3File.Find(endVector, startPosition: initOffset);

                    if ((endOffset != -1))
                    {
                        int length = System.Convert.ToInt32(endOffset - initOffset) + (str.Length);
                        if ((length < maxLength))
                        {
                            try
                            {
                                mp3File.Seek(initOffset, SeekOrigin.Begin);
                                // Dim raw As String = Me.mp3File.ReadBlock(length).ToString()
                                mp3File.RemoveBlock(initOffset, length);
                                Console.WriteLine($"Removed lyrics in {mp3File.Name}");
                                return;
                            }
                            catch (Exception ex)
                            {
                                throw ex;
                            }

                            finally
                            {
                                mp3File.Seek(0, SeekOrigin.Begin);
                            }
                        }
                        else
                        {
                            // We can handle it or continue...
                            continue;
                        }
                    }
                }
            }
        }