public void Evaluate(int spreadMax)
{
if (FStreamIn.SliceCount == 0 || FStreamIn[0] == null || FStreamIn[0].Length == 0)
{
spreadMax = 0;
}
else
{
spreadMax = FStreamIn.SliceCount;
}
FStreamOut.ResizeAndDispose(spreadMax, () => new MemoryStream());
for (int i = 0; i < spreadMax; i++)
{
var inputStream = FStreamIn[i];
var outputStream = FStreamOut[i];
inputStream.Position = 0;
outputStream.Position = 0;
FStreamOut[i].SetLength(0);
var length = (int)inputStream.Length;
IntPtr contentPtr = Marshal.AllocHGlobal(length);
byte[] memory = new byte[length];
inputStream.Read(memory, 0, length);
Marshal.Copy(memory, 0, contentPtr, length);
int maxCompressedLength = SnappyCodec.GetMaximumCompressedLength(length);
this.compressedFrameData = new byte[maxCompressedLength];
fixed(byte *bptr = &this.compressedFrameData[0])
{
this.compressedSize = maxCompressedLength;
SnappyCodec.Compress((byte *)contentPtr, length, bptr, ref this.compressedSize);
byte[] output = new byte[this.compressedSize];
Marshal.Copy((IntPtr)bptr, output, 0, this.compressedSize);
outputStream.Write(this.compressedFrameData, 0, this.compressedSize);
}
Marshal.FreeHGlobal(contentPtr);
}
FStreamOut.Flush(true);
}