1 /* 2 * LZMAEncDemo 3 * 4 * Author: Lasse Collin <lasse.collin (at) tukaani.org> 5 * 6 * This file has been put into the public domain. 7 * You can do whatever you want with this file. 8 */ 9 10 import java.io.*; 11 import org.tukaani.xz.*; 12 13 /** 14 * Compresses a single file from standard input to standard ouput into 15 * the .lzma file format. 16 * <p> 17 * NOTE: For most purposes, .lzma is a legacy format and usually you should 18 * use .xz instead. 19 * <p> 20 * Two optional arguments are supported: 21 * <ol> 22 * <li>LZMA preset level which is an integer in the range [0, 9]. 23 * The default is 6.</li> 24 * <li>Uncompressed size of the input as bytes.<li> 25 * </ol> 26 */ 27 class LZMAEncDemo { 28 public static void main(String[] args) throws Exception { 29 LZMA2Options options = new LZMA2Options(); 30 long inputSize = -1; 31 32 if (args.length >= 1) 33 options.setPreset(Integer.parseInt(args[0])); 34 35 if (args.length >= 2) 36 inputSize = Long.parseLong(args[1]); 37 38 System.err.println("Encoder memory usage: " 39 + options.getEncoderMemoryUsage() + " KiB"); 40 System.err.println("Decoder memory usage: " 41 + options.getDecoderMemoryUsage() + " KiB"); 42 43 // LZMAOutputStream writes one byte at a time. It helps a little, 44 // especially in the fastest presets, to use BufferedOutputStream. 45 OutputStream out = new BufferedOutputStream(System.out); 46 LZMAOutputStream encoder = new LZMAOutputStream(out, options, 47 inputSize); 48 49 byte[] buf = new byte[8192]; 50 int size; 51 while ((size = System.in.read(buf)) != -1) 52 encoder.write(buf, 0, size); 53 54 encoder.finish(); 55 out.flush(); 56 } 57 } 58
