public static byte[] Decompress(byte[] inputBytes)
{
MemoryStream newInStream = new MemoryStream(inputBytes);
Compression.LZMA.Decoder decoder = new Compression.LZMA.Decoder();
newInStream.Seek(0, 0);
MemoryStream newOutStream = new MemoryStream();
byte[] properties2 = new byte[5];
if (newInStream.Read(properties2, 0, 5) != 5)
{
throw (new Exception("input .lzma is too short"));
}
long outSize = 0;
for (int i = 0; i < 8; i++)
{
int v = newInStream.ReadByte();
if (v < 0)
{
throw (new Exception("Can't Read 1"));
}
outSize |= ((long)(byte)v) << (8 * i);
}
decoder.SetDecoderProperties(properties2);
long compressedSize = newInStream.Length - newInStream.Position;
decoder.Code(newInStream, newOutStream, compressedSize, outSize, null);
byte[] b = newOutStream.ToArray();
return(b);
}
/// <summary>
/// Internal wrapper implementation for SevenZip.Compression.LZMA.Decoder.
/// </summary>
/// <exception cref="ArgumentException" />
/// <exception cref="InsufficientFreeSpaceException" />
/// <remarks>Implementation taken from LzmaAlone.cs (in the LZMA SDK).</remarks>
void decoder_DoWork(object sender, DoWorkEventArgs e)
{
if (!AllowConcurrentDecoding)
concurrency.WaitOne(); // block until signaled
StreamDecoder decoder = (StreamDecoder)sender;
Stream inStream = (Stream)e.Argument;
DateTime start = DateTime.Now;
byte[] properties = new byte[5];
if (inStream.Read(properties, 0, 5) != 5)
throw new ArgumentException("LZMA input data is too short");
Compression.LZMA.Decoder lzmaDecoder = new Compression.LZMA.Decoder();
lzmaDecoder.SetDecoderProperties(properties);
outSize = 0;
for (int i = 0; i < 8; i++)
{
int v = inStream.ReadByte();
if (v < 0)
throw new ArgumentException("LZMA input data is empty/unreadable");
outSize |= ((long)(byte)v) << (8 * i);
}
try
{
if (!decoder.FreeSpaceRequired(outSize))
{
Exception blame = new Exception(String.Format("Sorry, {0} didn't explain what went wrong.", this.GetType()));
throw new InsufficientFreeSpaceException(blame); // unknown issue; name and shame :)
}
}
catch (InsufficientFreeSpaceException)
{
throw; // rethrow; this is already of the correct type
}
catch (Exception ex)
{
throw new InsufficientFreeSpaceException(ex); // other known issue; convert to InsufficientFreeSpaceException
}
long compressedSize = inStream.Length - inStream.Position;
lzmaDecoder.Code(inStream, outStream, compressedSize, outSize, this);
TimeSpan elapsed = DateTime.Now - start;
double speed = outSize / 1024 / elapsed.TotalSeconds;
Debug.WriteLine(String.Format("LZMA decompression took {0}s. for {1}(c.)/{2}(u.) bytes at {3}KB/s", elapsed.TotalSeconds, compressedSize, outSize, (int)speed));
if (!AllowConcurrentDecoding)
concurrency.Set(); // reset signal
}
