public void Deflate_Compress()
{
compressedData.Clear();
byte[] testData = new byte[35000];
for (int i = 0; i < testData.Length; ++i)
testData[i] = 5;
using (Deflater def = new Deflater((CompressLevel)5))
{
def.DataAvailable += new DataAvailableHandler(CDataAvail);
def.Add(testData);
def.Finish();
adler1 = def.Checksum;
}
}
/// <summary>
/// Compress a stream with ZLib
/// </summary>
/// <param name="snipStreamWrapper">A stream wrapper object</param>
/// <param name="compressLevel">Compression level of stream.</param>
public static void Compress(SnipStreamWrapper snipStreamWrapper, CompressLevel compressLevel)
{
var numBytesAddressing = snipStreamWrapper.OutputBufferLength;
ZLibWrapper.CopyByteArrayToInputBuffer(snipStreamWrapper.OutputBuffer, 0,
snipStreamWrapper.OutputBufferLength);
if (_deflaterBest == null)
{
_deflaterBest = new Deflater(CompressLevel.Best);
_deflaterBest.DataAvailable += ZLibWrapper.WriteInOutputBuffer;
}
if (_deflaterNone == null)
{
_deflaterNone = new Deflater(CompressLevel.None);
_deflaterNone.DataAvailable += ZLibWrapper.WriteInOutputBuffer;
}
if (_deflaterFastest == null)
{
_deflaterFastest = new Deflater(CompressLevel.Fastest);
_deflaterFastest.DataAvailable += ZLibWrapper.WriteInOutputBuffer;
}
if (_deflaterDefault == null)
{
_deflaterDefault = new Deflater(CompressLevel.Default);
_deflaterDefault.DataAvailable += ZLibWrapper.WriteInOutputBuffer;
}
try
{
while (numBytesAddressing > 0u)
{
uint numBytes = Math.Min(numBytesAddressing, 8192u); //8192u); 65536u
if (compressLevel == CompressLevel.None)
_deflaterNone.Add(ZLibWrapper.ReadBytes((int) numBytes, ZLibBufferType.InputBuffer));
if (compressLevel == CompressLevel.Best)
_deflaterBest.Add(ZLibWrapper.ReadBytes((int) numBytes, ZLibBufferType.InputBuffer));
if (compressLevel == CompressLevel.Default)
_deflaterDefault.Add(ZLibWrapper.ReadBytes((int) numBytes, ZLibBufferType.InputBuffer));
if (compressLevel == CompressLevel.Fastest)
_deflaterFastest.Add(ZLibWrapper.ReadBytes((int) numBytes, ZLibBufferType.InputBuffer));
numBytesAddressing -= numBytes;
}
string deflateErrorMsg = string.Empty;
if (compressLevel == CompressLevel.None)
deflateErrorMsg = _deflaterNone._ztream.msg;
if (compressLevel == CompressLevel.Best)
deflateErrorMsg = _deflaterBest._ztream.msg;
if (compressLevel == CompressLevel.Default)
deflateErrorMsg = _deflaterDefault._ztream.msg;
if (compressLevel == CompressLevel.Fastest)
deflateErrorMsg = _deflaterFastest._ztream.msg;
if (!string.IsNullOrWhiteSpace(deflateErrorMsg))
MessageBox.Show(string.Format("ZLib.Compress: {0}", deflateErrorMsg),
TranslateUI.TranslateUiGlobalization.ResManager.GetString("ZLib_Error"),
MessageBoxButtons.OK,
MessageBoxIcon.Error);
if (compressLevel == CompressLevel.None)
_deflaterNone.Finish(); // flush zlib buffer
if (compressLevel == CompressLevel.Best)
_deflaterBest.Finish(); // flush zlib buffer
if (compressLevel == CompressLevel.Default)
_deflaterDefault.Finish(); // flush zlib buffer
if (compressLevel == CompressLevel.Fastest)
_deflaterFastest.Finish(); // flush zlib buffer
ZLibWrapper.Position(0, ZLibBufferType.OutputBuffer);
}
catch (Exception ex)
{
MessageBox.Show(
string.Format(TranslateUI.TranslateUiGlobalization.ResManager.GetString(name: "MSG_ErrorWithNewLine"), arg0: ex),
TranslateUI.TranslateUiGlobalization.ResManager.GetString(name: "ZLib_Compress"),
MessageBoxButtons.OK,
MessageBoxIcon.Error);
}
finally
{
if (ZLibWrapper.OutputBufferLength == 0)
{
MessageBox.Show(
TranslateUI.TranslateUiGlobalization.ResManager.GetString(name: "ZLib_OutputBufferEmpty"),
TranslateUI.TranslateUiGlobalization.ResManager.GetString(name: "ZLib_Compress"),
MessageBoxButtons.OK,
MessageBoxIcon.Error);
}
}
}
public void Deflate_Init()
{
using (Deflater def = new Deflater(CompressLevel.Default))
{
}
}
/// <summary>
/// Release all deflater instance
/// </summary>
public static void ReleaseDeflater()
{
if (_deflaterBest != null)
{
_deflaterBest.DataAvailable -= ZLibWrapper.WriteInOutputBuffer;
_deflaterBest.Dispose();
_deflaterBest = null;
}
if (_deflaterNone != null)
{
_deflaterNone.DataAvailable -= ZLibWrapper.WriteInOutputBuffer;
_deflaterNone.Dispose();
_deflaterNone = null;
}
if (_deflaterFastest != null)
{
_deflaterFastest.DataAvailable -= ZLibWrapper.WriteInOutputBuffer;
_deflaterFastest.Dispose();
_deflaterFastest = null;
}
if (_deflaterDefault != null)
{
_deflaterDefault.DataAvailable -= ZLibWrapper.WriteInOutputBuffer;
_deflaterDefault.Dispose();
_deflaterDefault = null;
}
}