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/*
* XZSeekEncDemo
*
* Author: Lasse Collin <lasse.collin@tukaani.org>
*
* This file has been put into the public domain.
* You can do whatever you want with this file.
*/
import java.io.*;
import org.tukaani.xz.*;
/**
* Compresses a single file from standard input to standard ouput into
* a random-accessible .xz file.
* <p>
* Arguments: [preset [block size]]
* <p>
* Preset is an LZMA2 preset level which is an integer in the range [0, 9].
* The default is 6.
* <p>
* Block size specifies the amount of uncompressed data to store per
* XZ Block. The default is 1 MiB (1048576 bytes). Bigger means better
* compression ratio. Smaller means faster random access.
*/
class XZSeekEncDemo {
public static void main(String[] args) throws Exception {
LZMA2Options options = new LZMA2Options();
if (args.length >= 1)
options.setPreset(Integer.parseInt(args[0]));
int blockSize = 1024 * 1024;
if (args.length >= 2)
blockSize = Integer.parseInt(args[1]);
options.setDictSize(Math.min(options.getDictSize(),
Math.max(LZMA2Options.DICT_SIZE_MIN,
blockSize)));
System.err.println("Encoder memory usage: "
+ options.getEncoderMemoryUsage() + " KiB");
System.err.println("Decoder memory usage: "
+ options.getDecoderMemoryUsage() + " KiB");
System.err.println("Block size: " + blockSize + " B");
XZOutputStream out = new XZOutputStream(System.out, options);
byte[] buf = new byte[8192];
int left = blockSize;
while (true) {
int size = System.in.read(buf, 0, Math.min(buf.length, left));
if (size == -1)
break;
out.write(buf, 0, size);
left -= size;
if (left == 0) {
out.endBlock();
left = blockSize;
}
}
out.finish();
}
}
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