public static extern size_t ZSTD_decompressDCtx(ZStdDecompressionHandle ctx, IntPtr dst, size_t dstCapacity, IntPtr src, size_t srcSize);
public static extern size_t ZSTD_decompress_usingDDict(ZStdDecompressionHandle dctx, IntPtr dst, size_t dstCapacity, IntPtr src, size_t srcSize, IntPtr ddict);