/// <summary>
/// Decodes the specified data.
/// </summary>
public override byte[] Decode(byte[] data, FilterParms parms)
{
MemoryStream msInput = new MemoryStream(data);
MemoryStream msOutput = new MemoryStream();
InflaterInputStream iis = new InflaterInputStream(msInput, new Inflater(false));
int cbRead;
byte[] abResult = new byte[32768];
do
{
cbRead = iis.Read(abResult, 0, abResult.Length);
if (cbRead > 0)
{
msOutput.Write(abResult, 0, cbRead);
}
}while (cbRead > 0);
iis.Close();
msOutput.Flush();
if (msOutput.Length >= 0)
{
if (parms.DecodeParms != null)
{
return(StreamDecoder.Decode(msOutput.ToArray(), parms.DecodeParms));
}
return(msOutput.ToArray());
}
return(null);
}
/// <summary>
/// Decodes the specified data.
/// </summary>
public override byte[] Decode(byte[] data, FilterParms parms)
{
if (data[0] == 0x00 && data[1] == 0x01)
{
throw new Exception("LZW flavour not supported.");
}
MemoryStream outputStream = new MemoryStream();
InitializeDictionary();
_data = data;
_bytePointer = 0;
_nextData = 0;
_nextBits = 0;
int code, oldCode = 0;
byte[] str;
while ((code = NextCode) != 257)
{
if (code == 256)
{
InitializeDictionary();
code = NextCode;
if (code == 257)
{
break;
}
outputStream.Write(_stringTable[code], 0, _stringTable[code].Length);
oldCode = code;
}
else
{
if (code < _tableIndex)
{
str = _stringTable[code];
outputStream.Write(str, 0, str.Length);
AddEntry(_stringTable[oldCode], str[0]);
oldCode = code;
}
else
{
str = _stringTable[oldCode];
outputStream.Write(str, 0, str.Length);
AddEntry(str, str[0]);
oldCode = code;
}
}
}
if (outputStream.Length >= 0)
{
if (parms.DecodeParms != null)
{
return(StreamDecoder.Decode(outputStream.ToArray(), parms.DecodeParms));
}
return(outputStream.ToArray());
}
return(null);
}
