public Stream DecodeStream(Stream s) { Huffman4 huff = new Huffman4(); MemoryStream outStream = new MemoryStream(); huff.Decompress(s, s.Length, outStream); outStream.Position = 0; return(outStream); }
private static int DoCompress(string infile, MemoryStream output, Formats format, out Formats actualFormat) { CompressionFormat fmt = null; switch (format) { case Formats.LZ10: fmt = new LZ10(); break; case Formats.LZ11: fmt = new LZ11(); break; case Formats.LZOVL: fmt = new LZOvl(); break; case Formats.RLE: fmt = new RLE(); break; case Formats.HUFF4: fmt = new Huffman4(); break; case Formats.HUFF8: fmt = new Huffman8(); break; case Formats.HUFF: return(CompressHuff(infile, output, out actualFormat)); case Formats.GBA: return(CompressGBA(infile, output, out actualFormat)); case Formats.NDS: return(CompressNDS(infile, output, out actualFormat)); default: throw new Exception("Unhandled compression format " + format); } actualFormat = format; using (FileStream inStream = File.OpenRead(infile)) { try { return(fmt.Compress(inStream, inStream.Length, output)); } catch (Exception s) { // any exception generated by compression is a fatal exception Console.WriteLine(s.Message); return(-1); } } }
private static int CompressBest(string infile, MemoryStream output, out Formats actualFormat, params Formats[] formats) { // only read the input data once from the file. byte[] inputData; using (FileStream inStream = File.OpenRead(infile)) { inputData = new byte[inStream.Length]; inStream.Read(inputData, 0, inputData.Length); } MemoryStream bestOutput = null; int minCompSize = int.MaxValue; actualFormat = Formats.GBA; foreach (Formats format in formats) { #region compress the file in each format, and save the best one MemoryStream currentOutput = new MemoryStream(); CompressionFormat realFormat = null; switch (format) { case Formats.HUFF4: realFormat = new Huffman4(); break; case Formats.HUFF8: realFormat = new Huffman8(); break; case Formats.LZ10: realFormat = new LZ10(); break; case Formats.LZ11: realFormat = new LZ11(); break; case Formats.LZOVL: realFormat = new LZOvl(); break; case Formats.RLE: realFormat = new RLE(); break; default: Console.WriteLine("Unsupported single format: " + format); continue; } int currentOutSize; try { using (MemoryStream inStream = new MemoryStream(inputData)) { currentOutSize = realFormat.Compress(inStream, inStream.Length, currentOutput); } } catch (InputTooLargeException i) { Console.WriteLine(i.Message); actualFormat = format; return(-1); } catch (Exception) { continue; } if (currentOutSize < minCompSize) { bestOutput = currentOutput; minCompSize = currentOutSize; actualFormat = format; } #endregion } if (bestOutput == null) { Console.WriteLine("The file could not be compressed in any format."); return(-1); } bestOutput.WriteTo(output); return(minCompSize); }