public void FrameRoundTrip(
[ValueSource(typeof(Utilities), nameof(Utilities.CompressionLevels))]
int compressionLevel,
[Values(false, true)] bool useDictionary
)
{
#pragma warning disable 8632
var dict = useDictionary
? Utilities.CreateDictionaryFromSamples(32 * 1024, 30, compressionLevel)
// ReSharper disable once RedundantCast // downlevel impl requires
: (ZStdDictionaryBuilder?)null;
#pragma warning restore 8632
var sample = Utilities.GenerateSampleBuffer(1000);
Console.WriteLine($"Compression Level: {compressionLevel}");
// compression
using var cDict = dict?.CreateCompressorDictionary(compressionLevel);
using var cCtx = new ZStdCompressor();
cCtx.UseDictionary(cDict);
var compressBufferSize = CCtx.GetUpperBound((UIntPtr)sample.Length).ToUInt32();
var compressBuffer = new byte[compressBufferSize];
cCtx.Set(CompressionParameter.CompressionLevel, compressionLevel);
var compressedSize = cCtx.Compress(compressBuffer, sample);
compressedSize.ToUInt64().Should().NotBe(0);
var compressedFrame = new ArraySegment <byte>(compressBuffer, 0, (int)compressedSize);
Console.WriteLine($"Compressed to: {compressedSize} ({(double) compressedSize / (double) sample.Length:P})");
// decompression
using var dDict = dict?.CreateDecompressorDictionary();
using var dCtx = new ZStdDecompressor();
dCtx.UseDictionary(dDict);
var decompressBufferSize = DCtx.GetUpperBound(compressedFrame);
decompressBufferSize.Should().NotBe(0);
decompressBufferSize.Should().BeGreaterOrEqualTo((ulong)sample.Length);
var decompressBuffer = new byte[decompressBufferSize];
var decompressedSize = dCtx.Decompress(decompressBuffer, compressedFrame);
(decompressedSize).Should().Be((UIntPtr)sample.Length);
decompressBuffer.Take((int)decompressedSize).Should().Equal(sample);
}
public void StreamRoundTrip(
[ValueSource(typeof(Utilities), nameof(Utilities.CompressionLevels))]
int compressionLevel,
[Values(false, true)] bool useDictionary
)
{
#pragma warning disable 8632
var dict = useDictionary
? Utilities.CreateDictionaryFromSamples(32 * 1024, 30, compressionLevel)
// ReSharper disable once RedundantCast // downlevel impl requires
: (ZStdDictionaryBuilder?)null;
#pragma warning restore 8632
var sample = Utilities.GenerateSampleBuffer(1000);
Console.WriteLine($"Compression Level: {compressionLevel}");
// compression
using var cDict = dict?.CreateCompressorDictionary(compressionLevel);
using var cCtx = new ZStdCompressor();
cCtx.UseDictionary(cDict);
var compressBufferSize = CCtx.GetUpperBound((UIntPtr)sample.Length).ToUInt32();
var compressBuffer = new byte[compressBufferSize];
UIntPtr compressedSize;
cCtx.Set(CompressionParameter.CompressionLevel, compressionLevel);
{
var outBuf = new ArraySegment <byte>(compressBuffer, 0, compressBuffer.Length);
var inBuf = new ArraySegment <byte>(sample, 0, sample.Length);
var amountRemaining = cCtx.StreamCompress(ref outBuf, ref inBuf, EndDirective.End);
amountRemaining.ToUInt64().Should().Be(0);
outBuf.Offset.Should().NotBe(0);
inBuf.Offset.Should().NotBe(0);
inBuf.Offset.Should().Be(sample.Length);
compressedSize = (UIntPtr)outBuf.Offset;
}
var compressedFrame = new ArraySegment <byte>(compressBuffer, 0, (int)compressedSize);
Console.WriteLine($"Compressed to: {compressedSize} ({(double) compressedSize / (double) sample.Length:P})");
// decompression
using var dDict = dict?.CreateDecompressorDictionary();
using var dCtx = new ZStdDecompressor();
dCtx.UseDictionary(dDict);
var decompressBufferSize = DCtx.GetUpperBound(compressedFrame);
var decompressBuffer = new byte[decompressBufferSize];
{
var outBuf = new ArraySegment <byte>(decompressBuffer, 0, decompressBuffer.Length);
var inBuf = compressedFrame;
var amountRemaining = dCtx.StreamDecompress(ref outBuf, ref inBuf);
amountRemaining.ToUInt64().Should().Be(0);
outBuf.Count.Should().Be(0);
inBuf.Count.Should().Be(0);
outBuf.Offset.Should().NotBe(0);
inBuf.Offset.Should().NotBe(0);
outBuf.Offset.Should().Be(sample.Length);
decompressBuffer.Take(outBuf.Offset).Should().Equal(sample);
}
}