//called when data for any output pin is requested
public void Evaluate(int spreadMax)
{
//ResizeAndDispose will adjust the spread length and thereby call
//the given constructor function for new slices and Dispose on old
//slices.
FStreamOut.ResizeAndDispose(spreadMax, () => new MemoryStream());
Tasks.SliceCount = spreadMax;
IOs.SliceCount = spreadMax;
FWorking.SliceCount = spreadMax;
FError.SliceCount = spreadMax;
for (int i = 0; i < spreadMax; i++)
{
if (!FAsync[i])
{
FWorking[i] = false;
}
if (FCompress[i])
{
IOs[i] = new CompressorIO();
IOs[i].InBytes = new byte[FStreamIn[i].Length];
FStreamIn[i].Position = 0;
FStreamIn[i].Read(IOs[i].InBytes, 0, (int)FStreamIn[i].Length);
if (FAsync[i])
{
Tasks[i] = new Task(CompressAsync, IOs[i]);
Tasks[i].Start();
}
else
{
CompressAsync(IOs[i]);
FWorking[i] = true;
FStreamOut[i].Position = 0;
FStreamOut[i].Write(IOs[i].OutBytes, 0, IOs[i].OutBytes.Length);
}
}
if (Tasks[i] != null)
{
if (FAsync[i])
{
if ((IOs[i].OutBytes != null) && FWorking[i])
{
FStreamOut[i].Position = 0;
FStreamOut[i].Write(IOs[i].OutBytes, 0, IOs[i].OutBytes.Length);
}
FWorking[i] = (!Tasks[i].IsCompleted) && (!Tasks[i].IsFaulted);
}
if (Tasks[i].Exception != null)
{
FError[i] = Tasks[i].Exception.Message;
}
}
}
//this will force the changed flag of the output pin to be set
FStreamOut.Flush(true);
}
//when dealing with byte streams (what we call Raw in the GUI) it's always
//good to have a byte buffer around. we'll use it when copying the data.
//readonly byte[] FBuffer = new byte[1024];
private void CompressAsync(object io)
{
CompressorIO IO = (CompressorIO)io;
IO.OutBytes = SevenZipHelper.Compress(IO.InBytes);
}