public WorkItem(int size, Newegg.Oversea.Silverlight.Utilities.Compression.CompressionLevel compressLevel, CompressionStrategy strategy)
{
buffer = new byte[size];
// alloc 5 bytes overhead for every block (margin of safety= 2)
int n = size + ((size / 32768) + 1) * 5 * 2;
compressed = new byte[n];
status = (int)Status.None;
compressor = new ZlibCodec();
compressor.InitializeDeflate(compressLevel, false);
compressor.OutputBuffer = compressed;
compressor.InputBuffer = buffer;
}
/// <summary>
/// Create a ParallelDeflateOutputStream using the specified
/// CompressionLevel and CompressionStrategy, and specifying whether to
/// leave the captive stream open when the ParallelDeflateOutputStream is
/// closed.
/// </summary>
/// <remarks>
/// See the <see cref="ParallelDeflateOutputStream(System.IO.Stream)"/>
/// constructor for example code.
/// </remarks>
/// <param name="stream">The stream to which compressed data will be written.</param>
/// <param name="level">A tuning knob to trade speed for effectiveness.</param>
/// <param name="strategy">
/// By tweaking this parameter, you may be able to optimize the compression for
/// data with particular characteristics.
/// </param>
/// <param name="leaveOpen">
/// true if the application would like the stream to remain open after inflation/deflation.
/// </param>
public ParallelDeflateOutputStream(System.IO.Stream stream,
CompressionLevel level,
CompressionStrategy strategy,
bool leaveOpen)
{
TraceOutput(TraceBits.Lifecycle | TraceBits.Session, "-------------------------------------------------------");
TraceOutput(TraceBits.Lifecycle | TraceBits.Session, "Create {0:X8}", this.GetHashCode());
_compressLevel = level;
_leaveOpen = leaveOpen;
Strategy = strategy;
BuffersPerCore = 4; // default
_writingDone = new ManualResetEvent(false);
_sessionReset = new ManualResetEvent(false);
_outStream = stream;
}