/// <summary>
/// Compress input stream into output stream using LZMA.
/// Remeber to set desirable positions input and output streams.
/// Input reading starts at inStream.Position and ends at inStream.Length.
/// Output writing starts at outStream.Position.
/// </summary>
/// <param name="inStream">Input stream</param>
/// <param name="outStream">Output stream</param>
public static void Compress(Stream inStream, Stream outStream)
{
Compression.LZMA.Encoder encoder = new Compression.LZMA.Encoder();
encoder.SetCoderProperties(propIDs, properties);
encoder.WriteCoderProperties(outStream);
var writer = new BinaryWriter(outStream, Encoding.UTF8);
// Write original size.
writer.Write(inStream.Length - inStream.Position);
// Save position with compressed size.
long positionForCompressedSize = outStream.Position;
// Leave placeholder for size after compression.
writer.Write((Int64)0);
long positionForCompressedDataStart = outStream.Position;
encoder.Code(inStream, outStream, -1, -1, null);
long positionAfterCompression = outStream.Position;
// Seek back to the placeholder for compressed size.
outStream.Position = positionForCompressedSize;
// Write size after compression.
writer.Write((Int64)(positionAfterCompression - positionForCompressedDataStart));
// Restore position.
outStream.Position = positionAfterCompression;
}
public static void Compress(Stream inputStream, Stream outputStream)
{
Compression.LZMA.Encoder encoder = new Compression.LZMA.Encoder();
encoder.SetCoderProperties(propIDs, properties);
encoder.WriteCoderProperties(outputStream);
long fileSize = inputStream.Length;
for (int i = 0; i < 8; i++)
{
outputStream.WriteByte((Byte)(fileSize >> (8 * i)));
}
encoder.Code(inputStream, outputStream, -1, -1, null);
}
public static byte[] Compress(byte[] inputBytes)
{
MemoryStream inStream = new MemoryStream(inputBytes);
MemoryStream outStream = new MemoryStream();
Compression.LZMA.Encoder encoder = new Compression.LZMA.Encoder();
encoder.SetCoderProperties(propIDs, properties);
encoder.WriteCoderProperties(outStream);
long fileSize = inStream.Length;
for (int i = 0; i < 8; i++)
{
outStream.WriteByte((Byte)(fileSize >> (8 * i)));
}
encoder.Code(inStream, outStream, -1, -1, null);
return(outStream.ToArray());
}
public static int Main2(string[] args)
{
System.Console.WriteLine("\nLZMA# 4.61 2008-11-23\n");
if (args.Length == 0)
{
PrintHelp();
return(0);
}
SwitchForm[] kSwitchForms = new SwitchForm[13];
int sw = 0;
kSwitchForms[sw++] = new SwitchForm("?", SwitchType.Simple, false);
kSwitchForms[sw++] = new SwitchForm("H", SwitchType.Simple, false);
kSwitchForms[sw++] = new SwitchForm("A", SwitchType.UnLimitedPostString, false, 1);
kSwitchForms[sw++] = new SwitchForm("D", SwitchType.UnLimitedPostString, false, 1);
kSwitchForms[sw++] = new SwitchForm("FB", SwitchType.UnLimitedPostString, false, 1);
kSwitchForms[sw++] = new SwitchForm("LC", SwitchType.UnLimitedPostString, false, 1);
kSwitchForms[sw++] = new SwitchForm("LP", SwitchType.UnLimitedPostString, false, 1);
kSwitchForms[sw++] = new SwitchForm("PB", SwitchType.UnLimitedPostString, false, 1);
kSwitchForms[sw++] = new SwitchForm("MF", SwitchType.UnLimitedPostString, false, 1);
kSwitchForms[sw++] = new SwitchForm("EOS", SwitchType.Simple, false);
kSwitchForms[sw++] = new SwitchForm("SI", SwitchType.Simple, false);
kSwitchForms[sw++] = new SwitchForm("SO", SwitchType.Simple, false);
kSwitchForms[sw++] = new SwitchForm("T", SwitchType.UnLimitedPostString, false, 1);
Parser parser = new Parser(sw);
try
{
parser.ParseStrings(kSwitchForms, args);
}
catch
{
return(IncorrectCommand());
}
if (parser[(int)Key.Help1].ThereIs || parser[(int)Key.Help2].ThereIs)
{
PrintHelp();
return(0);
}
System.Collections.ArrayList nonSwitchStrings = parser.NonSwitchStrings;
int paramIndex = 0;
if (paramIndex >= nonSwitchStrings.Count)
{
return(IncorrectCommand());
}
string command = (string)nonSwitchStrings[paramIndex++];
command = command.ToLower();
bool dictionaryIsDefined = false;
Int32 dictionary = 1 << 21;
if (parser[(int)Key.Dictionary].ThereIs)
{
Int32 dicLog;
if (!GetNumber((string)parser[(int)Key.Dictionary].PostStrings[0], out dicLog))
{
IncorrectCommand();
}
dictionary = (Int32)1 << dicLog;
dictionaryIsDefined = true;
}
string mf = "bt4";
if (parser[(int)Key.MatchFinder].ThereIs)
{
mf = (string)parser[(int)Key.MatchFinder].PostStrings[0];
}
mf = mf.ToLower();
if (command == "b")
{
const Int32 kNumDefaultItereations = 10;
Int32 numIterations = kNumDefaultItereations;
if (paramIndex < nonSwitchStrings.Count)
{
if (!GetNumber((string)nonSwitchStrings[paramIndex++], out numIterations))
{
numIterations = kNumDefaultItereations;
}
}
return(LzmaBench.LzmaBenchmark(numIterations, (UInt32)dictionary));
}
string train = "";
if (parser[(int)Key.Train].ThereIs)
{
train = (string)parser[(int)Key.Train].PostStrings[0];
}
bool encodeMode = false;
if (command == "e")
{
encodeMode = true;
}
else if (command == "d")
{
encodeMode = false;
}
else
{
IncorrectCommand();
}
bool stdInMode = parser[(int)Key.StdIn].ThereIs;
bool stdOutMode = parser[(int)Key.StdOut].ThereIs;
Stream inStream = null;
if (stdInMode)
{
throw (new Exception("Not implemeted"));
}
else
{
if (paramIndex >= nonSwitchStrings.Count)
{
IncorrectCommand();
}
string inputName = (string)nonSwitchStrings[paramIndex++];
inStream = new FileStream(inputName, FileMode.Open, FileAccess.Read);
}
FileStream outStream = null;
if (stdOutMode)
{
throw (new Exception("Not implemeted"));
}
else
{
if (paramIndex >= nonSwitchStrings.Count)
{
IncorrectCommand();
}
string outputName = (string)nonSwitchStrings[paramIndex++];
outStream = new FileStream(outputName, FileMode.Create, FileAccess.Write);
}
FileStream trainStream = null;
if (train.Length != 0)
{
trainStream = new FileStream(train, FileMode.Open, FileAccess.Read);
}
if (encodeMode)
{
if (!dictionaryIsDefined)
{
dictionary = 1 << 23;
}
Int32 posStateBits = 2;
Int32 litContextBits = 3; // for normal files
// UInt32 litContextBits = 0; // for 32-bit data
Int32 litPosBits = 0;
// UInt32 litPosBits = 2; // for 32-bit data
Int32 algorithm = 2;
Int32 numFastBytes = 128;
bool eos = parser[(int)Key.EOS].ThereIs || stdInMode;
if (parser[(int)Key.Mode].ThereIs)
{
if (!GetNumber((string)parser[(int)Key.Mode].PostStrings[0], out algorithm))
{
IncorrectCommand();
}
}
if (parser[(int)Key.FastBytes].ThereIs)
{
if (!GetNumber((string)parser[(int)Key.FastBytes].PostStrings[0], out numFastBytes))
{
IncorrectCommand();
}
}
if (parser[(int)Key.LitContext].ThereIs)
{
if (!GetNumber((string)parser[(int)Key.LitContext].PostStrings[0], out litContextBits))
{
IncorrectCommand();
}
}
if (parser[(int)Key.LitPos].ThereIs)
{
if (!GetNumber((string)parser[(int)Key.LitPos].PostStrings[0], out litPosBits))
{
IncorrectCommand();
}
}
if (parser[(int)Key.PosBits].ThereIs)
{
if (!GetNumber((string)parser[(int)Key.PosBits].PostStrings[0], out posStateBits))
{
IncorrectCommand();
}
}
CoderPropID[] propIDs =
{
CoderPropID.DictionarySize,
CoderPropID.PosStateBits,
CoderPropID.LitContextBits,
CoderPropID.LitPosBits,
CoderPropID.Algorithm,
CoderPropID.NumFastBytes,
CoderPropID.MatchFinder,
CoderPropID.EndMarker
};
object[] properties =
{
(Int32)(dictionary),
(Int32)(posStateBits),
(Int32)(litContextBits),
(Int32)(litPosBits),
(Int32)(algorithm),
(Int32)(numFastBytes),
mf,
eos
};
Compression.LZMA.Encoder encoder = new Compression.LZMA.Encoder();
encoder.SetCoderProperties(propIDs, properties);
encoder.WriteCoderProperties(outStream);
Int64 fileSize;
if (eos || stdInMode)
{
fileSize = -1;
}
else
{
fileSize = inStream.Length;
}
for (int i = 0; i < 8; i++)
{
outStream.WriteByte((Byte)(fileSize >> (8 * i)));
}
if (trainStream != null)
{
CDoubleStream doubleStream = new CDoubleStream();
doubleStream.s1 = trainStream;
doubleStream.s2 = inStream;
doubleStream.fileIndex = 0;
inStream = doubleStream;
long trainFileSize = trainStream.Length;
doubleStream.skipSize = 0;
if (trainFileSize > dictionary)
{
doubleStream.skipSize = trainFileSize - dictionary;
}
trainStream.Seek(doubleStream.skipSize, SeekOrigin.Begin);
encoder.SetTrainSize((uint)(trainFileSize - doubleStream.skipSize));
}
encoder.Code(inStream, outStream, -1, -1, null);
}
else if (command == "d")
{
byte[] properties = new byte[5];
if (inStream.Read(properties, 0, 5) != 5)
{
throw (new Exception("input .lzma is too short"));
}
Compression.LZMA.Decoder decoder = new Compression.LZMA.Decoder();
decoder.SetDecoderProperties(properties);
if (trainStream != null)
{
if (!decoder.Train(trainStream))
{
throw (new Exception("can't train"));
}
}
long outSize = 0;
for (int i = 0; i < 8; i++)
{
int v = inStream.ReadByte();
if (v < 0)
{
throw (new Exception("Can't Read 1"));
}
outSize |= ((long)(byte)v) << (8 * i);
}
long compressedSize = inStream.Length - inStream.Position;
decoder.Code(inStream, outStream, compressedSize, outSize, null);
}
else
{
throw (new Exception("Command Error"));
}
return(0);
}
static public int LzmaBenchmark(Int32 numIterations, UInt32 dictionarySize)
{
if (numIterations <= 0)
{
return(0);
}
if (dictionarySize < (1 << 18))
{
System.Console.WriteLine("\nError: dictionary size for benchmark must be >= 19 (512 KB)");
return(1);
}
System.Console.Write("\n Compressing Decompressing\n\n");
Compression.LZMA.Encoder encoder = new Compression.LZMA.Encoder();
Compression.LZMA.Decoder decoder = new Compression.LZMA.Decoder();
CoderPropID[] propIDs =
{
CoderPropID.DictionarySize,
};
object[] properties =
{
(Int32)(dictionarySize),
};
UInt32 kBufferSize = dictionarySize + kAdditionalSize;
UInt32 kCompressedBufferSize = (kBufferSize / 2) + kCompressedAdditionalSize;
encoder.SetCoderProperties(propIDs, properties);
System.IO.MemoryStream propStream = new System.IO.MemoryStream();
encoder.WriteCoderProperties(propStream);
byte[] propArray = propStream.ToArray();
CBenchRandomGenerator rg = new CBenchRandomGenerator();
rg.Set(kBufferSize);
rg.Generate();
CRC crc = new CRC();
crc.Init();
crc.Update(rg.Buffer, 0, rg.BufferSize);
CProgressInfo progressInfo = new CProgressInfo();
progressInfo.ApprovedStart = dictionarySize;
UInt64 totalBenchSize = 0;
UInt64 totalEncodeTime = 0;
UInt64 totalDecodeTime = 0;
UInt64 totalCompressedSize = 0;
MemoryStream inStream = new MemoryStream(rg.Buffer, 0, (int)rg.BufferSize);
MemoryStream compressedStream = new MemoryStream((int)kCompressedBufferSize);
CrcOutStream crcOutStream = new CrcOutStream();
for (Int32 i = 0; i < numIterations; i++)
{
progressInfo.Init();
inStream.Seek(0, SeekOrigin.Begin);
compressedStream.Seek(0, SeekOrigin.Begin);
encoder.Code(inStream, compressedStream, -1, -1, progressInfo);
TimeSpan sp2 = DateTime.UtcNow - progressInfo.Time;
UInt64 encodeTime = (UInt64)sp2.Ticks;
long compressedSize = compressedStream.Position;
if (progressInfo.InSize == 0)
{
throw (new Exception("Internal ERROR 1282"));
}
UInt64 decodeTime = 0;
for (int j = 0; j < 2; j++)
{
compressedStream.Seek(0, SeekOrigin.Begin);
crcOutStream.Init();
decoder.SetDecoderProperties(propArray);
UInt64 outSize = kBufferSize;
System.DateTime startTime = DateTime.UtcNow;
decoder.Code(compressedStream, crcOutStream, 0, (Int64)outSize, null);
TimeSpan sp = (DateTime.UtcNow - startTime);
decodeTime = (ulong)sp.Ticks;
if (crcOutStream.GetDigest() != crc.GetDigest())
{
throw (new Exception("CRC Error"));
}
}
UInt64 benchSize = kBufferSize - (UInt64)progressInfo.InSize;
PrintResults(dictionarySize, encodeTime, benchSize, false, 0);
System.Console.Write(" ");
PrintResults(dictionarySize, decodeTime, kBufferSize, true, (ulong)compressedSize);
System.Console.WriteLine();
totalBenchSize += benchSize;
totalEncodeTime += encodeTime;
totalDecodeTime += decodeTime;
totalCompressedSize += (ulong)compressedSize;
}
System.Console.WriteLine("---------------------------------------------------");
PrintResults(dictionarySize, totalEncodeTime, totalBenchSize, false, 0);
System.Console.Write(" ");
PrintResults(dictionarySize, totalDecodeTime,
kBufferSize * (UInt64)numIterations, true, totalCompressedSize);
System.Console.WriteLine(" Average");
return(0);
}