/**
* lzma 壓縮
*
* <p>MODE_1(1, 0, 16, 64, Encoder.EMatchFinderTypeBT2, 3, 0, 2),
*
* <p>MODE_2(2, 0, 20, 64, Encoder.EMatchFinderTypeBT2, 3, 0, 2),
*
* <p>MODE_3(3, 1, 19, 64, Encoder.EMatchFinderTypeBT4, 3, 0, 2),
*
* <p>MODE_4(4, 2, 20, 64, Encoder.EMatchFinderTypeBT4, 3, 0, 2),
*
* <p>MODE_5(5, 2, 21, 128, Encoder.EMatchFinderTypeBT4, 3, 0, 2),
*
* <p>MODE_6(6, 2, 22, 128, Encoder.EMatchFinderTypeBT4, 3, 0, 2),
*
* <p>MODE_7(7, 2, 23, 128, Encoder.EMatchFinderTypeBT4, 3, 0, 2),
*
* <p>MODE_8(8, 2, 24, 255, Encoder.EMatchFinderTypeBT4, 3, 0, 2),
*
* <p>MODE_9(9, 2, 25, 255, Encoder.EMatchFinderTypeBT4, 3, 0, 2);
*
* @param value
* @return
*/
public static byte[] lzma(byte[] value) {
byte[] result = new byte[0];
//
ByteArrayInputStream in = null;
ByteArrayOutputStream out = null;
try {
Encoder encoder = new Encoder();
in = new ByteArrayInputStream(value);
out = new ByteArrayOutputStream();
// fast
encoder.SetEndMarkerMode(true);
encoder.SetAlgorithm(0);
// dictionarysize是主要佔用記憶體的地方（0-30）
encoder.SetDictionarySize(1 << 20);
// fb是主要速度的地方（越小越快壓縮率越低，5-273）
encoder.SetNumFastBytes(64);
encoder.SetMatchFinder(Encoder.EMatchFinderTypeBT2);
encoder.SetLcLpPb(3, 0, 2);
encoder.WriteCoderProperties(out);
//
encoder.Code(in, out, -1, -1, null);
result = out.toByteArray();
} catch (Exception ex) {
ex.printStackTrace();
} finally {
IoHelper.close(in);
IoHelper.close(out);
}
return result;
}
private static byte[] encodeToLZMA(byte[] detailsData) throws IOException {
Encoder lzma = new Encoder();
ByteArrayOutputStream lzOut = new ByteArrayOutputStream();
lzma.SetEndMarkerMode(true);
lzma.WriteCoderProperties(lzOut);
lzOut.write(getBytes(detailsData.length));
lzma.Code(
new ByteArrayInputStream(detailsData), lzOut, 0, 0, new ProgressLZMA(detailsData.length));
lzOut.close();
detailsData = lzOut.toByteArray();
return detailsData;
}
