public LZ4Decoder(int blockSize, int extraBlocks) { blockSize = Mem.RoundUp(Math.Max(blockSize, Mem.K1), Mem.K1); extraBlocks = Math.Max(extraBlocks, 0); _blockSize = blockSize; _outputLength = Mem.K64 + (1 + extraBlocks) * _blockSize + 8; _outputIndex = 0; _outputBuffer = (byte *)Mem.Alloc(_outputLength + 8); _context = (LZ4Context *)Mem.AllocZero(sizeof(LZ4Context)); }
/// <summary>Creates new instance of <see cref="LZ4HighChainEncoder"/></summary> /// <param name="level">Compression level.</param> /// <param name="blockSize">Block size.</param> /// <param name="extraBlocks">Number of extra blocks.</param> public LZ4HighChainEncoder(LZ4Level level, int blockSize, int extraBlocks = 0) : base(true, blockSize, extraBlocks) { if (level < LZ4Level.L03_HC) { level = LZ4Level.L03_HC; } if (level > LZ4Level.L12_MAX) { level = LZ4Level.L12_MAX; } _context = (LZ4Context *)Mem.AllocZero(sizeof(LZ4Context)); LZ4_64_HC.LZ4_resetStreamHC(_context, (int)level); }
public uint FastStreamManual(int blockLength, int sourceLength) { sourceLength = Mem.RoundUp(sourceLength, blockLength); var targetLength = 2 * sourceLength; var context = (LZ4_xx.LZ4_stream_t *)Mem.AllocZero(sizeof(LZ4_xx.LZ4_stream_t)); var source = (byte *)Mem.Alloc(sourceLength); var target = (byte *)Mem.Alloc(targetLength); try { Lorem.Fill(source, sourceLength); var sourceP = 0; var targetP = 0; while (sourceP < sourceLength && targetP < targetLength) { targetP += LZ4_64.LZ4_compress_fast_continue( context, source + sourceP, target + targetP, Math.Min(blockLength, sourceLength - sourceP), targetLength - targetP, 1); sourceP += blockLength; } return(Tools.Adler32(target, targetP)); } finally { Mem.Free(context); Mem.Free(source); Mem.Free(target); } }
public LZ4FastEncoder(int blockSize, int extraBlocks = 0) : base(blockSize, extraBlocks) { _context = (LZ4Context *)Mem.AllocZero(sizeof(LZ4Context)); }
public static LZ4_streamDecode_t *LZ4_createStreamDecode() => (LZ4_streamDecode_t *)Mem.AllocZero(sizeof(LZ4_streamDecode_t));