/// <summary>
/// Creates a compression stream on top of the <see cref="Stream"/> specified.
/// </summary>
/// <param name="stream">Inner stream.</param>
/// <param name="settings">Compression settings.</param>
/// <param name="leaveOpen">Leave inner stream open after disposing.</param>
/// <returns>
/// The compression stream.
/// </returns>
public static LZ4EncoderStream Encode(Stream stream, LZ4EncoderSettings settings = null, bool leaveOpen = false)
{
settings = settings ?? LZ4EncoderSettings.Default;
LZ4FrameDescriptor frameInfo = new LZ4FrameDescriptor(
settings.ContentLength,
settings.ContentChecksum,
settings.ChainBlocks,
settings.BlockChecksum,
settings.Dictionary,
settings.BlockSize);
LZ4CompressionLevel level = settings.CompressionLevel;
int extraMemory = settings.ExtraMemory;
return(new LZ4EncoderStream(
stream,
frameInfo,
i => LZ4EncodingFactory.CreateEncoder(i.Chaining, level, i.BlockSize, ExtraBlocks(i.BlockSize, extraMemory)),
leaveOpen));
}
public static void Encode(string original, string encoded, int chuckSize, LZ4Settings settings)
{
var frameInfo = new LZ4FrameDescriptor(null, false, settings.Chaining, false, null, settings.BlockSize);
using (var input = File.OpenRead(original))
using (var output = File.Create(encoded))
using (var encode = new LZ4EncoderStream(output, frameInfo,
i => LZ4EncodingFactory.CreateEncoder(i.Chaining, settings.Level, i.BlockSize, settings.ExtraBlocks)))
{
var buffer = new byte[chuckSize];
while (true)
{
var read = input.Read(buffer, 0, buffer.Length);
if (read == 0)
{
break;
}
encode.Write(buffer, 0, read);
}
}
}