/// <summary>
/// Compresses and resuses the ZLibStream's own BaseStream
/// </summary>
/// <param name="offset"></param>
public static void WriteBasestream(this Joveler.Compression.ZLib.ZLibStream stream, long offset = 0)
{
stream.BaseStream.Position = 0;
// the largest multiple of 4096 smaller than the LOH threshold
byte[] buffer = ArrayPool <byte> .Shared.Rent(81920);
// calculate the read position delta
offset -= stream.TotalIn;
// reading in chunks and jumping stream position is faster and allocates less with large streams
int read;
while ((read = stream.BaseStream.Read(buffer, 0, buffer.Length)) != 0)
{
// jump to the write position
stream.BaseStream.Position = offset + stream.TotalOut;
stream.Write(buffer, 0, read);
// reset to the next read position
stream.BaseStream.Position = offset + stream.TotalIn;
}
// jump to the final write position and flush the buffer
stream.BaseStream.Position = offset + stream.TotalOut;
stream.Flush();
ArrayPool <byte> .Shared.Return(buffer);
}
public void ZLib()
{
Joveler.Compression.ZLib.ZLibCompressOptions compOpts = new Joveler.Compression.ZLib.ZLibCompressOptions()
{
BufferSize = BufferSize,
};
Joveler.Compression.ZLib.ZLibDecompressOptions decompOpts = new Joveler.Compression.ZLib.ZLibDecompressOptions()
{
BufferSize = BufferSize,
};
byte[] zlibData;
using (MemoryStream ms = new MemoryStream())
{
using (MemoryStream rms = new MemoryStream(_srcData))
using (Joveler.Compression.ZLib.ZLibStream xzs = new Joveler.Compression.ZLib.ZLibStream(ms, compOpts))
{
rms.CopyTo(xzs);
}
zlibData = ms.ToArray();
}
using (MemoryStream ms = new MemoryStream())
{
using (MemoryStream rms = new MemoryStream(zlibData))
using (Joveler.Compression.ZLib.ZLibStream xzs = new Joveler.Compression.ZLib.ZLibStream(rms, decompOpts))
{
xzs.CopyTo(ms);
}
}
}
public double ZLib_Native()
{
long compLen;
byte[] rawData = SrcFiles[SrcFileName];
using (MemoryStream ms = new MemoryStream())
{
Joveler.Compression.ZLib.ZLibCompressOptions compOpts = new Joveler.Compression.ZLib.ZLibCompressOptions()
{
Level = NativeZLibLevelDict[Level],
LeaveOpen = true,
};
using (MemoryStream rms = new MemoryStream(rawData))
using (Joveler.Compression.ZLib.ZLibStream zs = new Joveler.Compression.ZLib.ZLibStream(ms, compOpts))
{
rms.CopyTo(zs);
}
ms.Flush();
compLen = ms.Position;
}
CompRatio = (double)compLen / rawData.Length;
return(CompRatio);
}
public long ZLib_Native()
{
Joveler.Compression.ZLib.ZLibDecompressOptions decompOpts = new Joveler.Compression.ZLib.ZLibDecompressOptions();
byte[] compData = SrcFiles[$"{Level}_{SrcFileName}.zz"];
using MemoryStream ms = new MemoryStream();
using (MemoryStream rms = new MemoryStream(compData))
using (Joveler.Compression.ZLib.ZLibStream zs = new Joveler.Compression.ZLib.ZLibStream(rms, decompOpts))
{
zs.CopyTo(ms);
}
ms.Flush();
return(ms.Length);
}
