Web Page Compressor 2.0 serial key or number

Online activation usually fails when Unity cannot contact the license server. This might be because you don’t have access to the internet, your firewall or proxy settings are blocking the connection, or the Unity license servers are down. For more information on why this can happen, see Troubleshooting, below.

When online activation fails, the Unity Editor automatically attempts to perform a manual activation. This page provides step-by-step instructions to manually activate Unity on your machine. You still need access to a machine with internet access, but it does not have to be the machine on which you are trying to activate Unity.

This documentation assumes you have already downloaded and installed Unity. To download Unity, you need an internet connection. Go to Download Unity to get the latest version. If you’re not sure which type of license you need, go to the Unity Store and view comparisons for Unity Personal, Plus and Pro.

Step 1: Get a license request file

1. Open Unity. When Unity cannot contact the license server, it displays a message in the License Management window that says “No network connection”.

2. Click Manual Activation.

3. Click Save License Request.

4. Save the file in a directory of your choice. Make sure you remember where you save the file. When you click Save, Unity displays a notification that reads “License request file saved successfully”.

This license request file is tied to the machine you used to generate it. This license file does not work on any other machine, and will not recognise the machine if you reformat it or make certain hardware changes.

Step 2: Request a license

Now that you have your license request file, the next steps require internet access. If your machine does not have internet access, you can activate your license on a machine that does have access by copying the file to the other machine, activating the license using the following steps, and then copying the file back to your machine to use Unity.

1. Go to the Unity license Manual Activation webpage. Click the Browse button, choose the license request file that you created in step 1, then click Next

2. Select the type of license you want to activate.

3. Enter the serial number, then click Next.

4. Click Download license file.

This downloads your license to the machine you’re using to browse the website. If you’re activating Unity on a different machine to the one that has internet acces, remember to transfer the license to the machine you want to activate Unity on.

Some browsers append “.xml” to the license file name. If this is the case, you need to delete this from the file name before you load the license file into Unity.

Step 3: Activate your licence

Now that you have your licence file, you can activate your Unity account.

Open Unity again and return to the License Management page.

Click Load License, and choose the license request file that you downloaded in step 2. If the license loads successfully, Unity displays a “Thank you!” message. Click Start Using Unity to continue.

Troubleshooting

If you encounter any error codes or other problems during the activation process, they might be caused by the following issues:

• Your machine might not have internet access. In this case, you might need to manually activate your licence. You can find instructions on how to do this in the Manual Activation documentation.
• Your firewall/proxy or internet security settings might be blocking Unity from sending and receiving data about your license file.
• You might not have the correct read/write privileges on your machine to save the license file. To solve this you might need to give these permissions to the user account your are using to attempt the licence activation. This is a particularly common problem in workplaces and schools; contact your IT administrator to find out whether there are restrictions in place that might prevent the activation process from working correctly.
• Major operating system changes or updates might affect your machine’s ID, which causes your licence to stop recognizing your machine. See the Unity Knowledge Base article I Have Just Updated/Installed A New Operating System. Why Is My License Failing To Activate?
• Unity’s license servers might be down. See the Unity Cloud System Status Page for status updates on the all Unity servers.

For information on all potential errors and how to resolve them, see the Unity Support Knowledge Base. If you can’t find a solution, contact Unity Customer Services for more assistance.

• License activation updated in Unity 2017.2

In computing, Deflate is a losslessdata compressionfile format that uses a combination of LZSS and Huffman coding. It was designed by Phil Katz, for version 2 of his PKZIP archiving tool. Deflate was later specified in RFC 1951 (1996).^[1]

Katz also designed the original algorithm used to construct Deflate streams. This algorithm was patented as U.S. Patent 5,051,745, and assigned to PKWARE, Inc.^[2][3] As stated in the RFC document, an algorithm producing Deflate files was widely thought to be implementable in a manner not covered by patents.^[1] This led to its widespread use, for example in gzip compressed files and PNG image files, in addition to the ZIP file format for which Katz originally designed it. The patent has since expired.

Stream format[edit]

A Deflate stream consists of a series of blocks. Each block is preceded by a 3-bit header:

• First bit: Last-block-in-stream marker:
  • : This is the last block in the stream.
  • : There are more blocks to process after this one.
• Second and third bits: Encoding method used for this block type:
  • : A stored (a.k.a. raw or literal) section, between 0 and 65,535 bytes in length
  • : A static Huffman compressed block, using a pre-agreed Huffman tree defined in the RFC
  • : A compressed block complete with the Huffman table supplied
  • : Reserved—don't use.

The stored block option adds minimal overhead, and is used for data that is incompressible.

Most compressible data will end up being encoded using method , the dynamic Huffman encoding, which produces an optimised Huffman tree customised for each block of data individually. Instructions to generate the necessary Huffman tree immediately follow the block header. The static Huffman option is used for short messages, where the fixed saving gained by omitting the tree outweighs the percentage compression loss due to using a non-optimal (thus, not technically Huffman) code.

Compression is achieved through two steps:

• The matching and replacement of duplicate strings with pointers.
• Replacing symbols with new, weighted symbols based on frequency of use.

Duplicate string elimination[edit]

Within compressed blocks, if a duplicate series of bytes is spotted (a repeated string), then a back-reference is inserted, linking to the previous location of that identical string instead. An encoded match to an earlier string consists of an 8-bit length (3–258 bytes) and a 15-bit distance (1–32,768 bytes) to the beginning of the duplicate. Relative back-references can be made across any number of blocks, as long as the distance appears within the last 32 KiB of uncompressed data decoded (termed the sliding window).

If the distance is less than the length, the duplicate overlaps itself, indicating repetition. For example, a run of 10 identical bytes can be encoded as one byte, followed by a duplicate of length 9, beginning with the previous byte.

Searching the preceding text for duplicate substrings is the most computationally expensive part of the DEFLATE algorithm, and the operation which compression level settings affect.

Bit reduction[edit]

The second compression stage consists of replacing commonly used symbols with shorter representations and less commonly used symbols with longer representations. The method used is Huffman coding which creates an unprefixed tree of non-overlapping intervals, where the length of each sequence is inversely proportional to the logarithm of the probability of that symbol needing to be encoded. The more likely it is that a symbol has to be encoded, the shorter its bit-sequence will be.

A tree is created, containing space for 288 symbols:

• 0–255: represent the literal bytes/symbols 0–255.
• 256: end of block – stop processing if last block, otherwise start processing next block.
• 257–285: combined with extra-bits, a match length of 3–258 bytes.
• 286, 287: not used, reserved and illegal but still part of the tree.

A match length code will always be followed by a distance code. Based on the distance code read, further "extra" bits may be read in order to produce the final distance. The distance tree contains space for 32 symbols:

• 0–3: distances 1–4
• 4–5: distances 5–8, 1 extra bit
• 6–7: distances 9–16, 2 extra bits
• 8–9: distances 17–32, 3 extra bits
• ...
• 26–27: distances 8,193–16,384, 12 extra bits
• 28–29: distances 16,385–32,768, 13 extra bits
• 30–31: not used, reserved and illegal but still part of the tree.

Note that for the match distance symbols 2–29, the number of extra bits can be calculated as .

The two codes (the 288-symbol length/literal tree and the 32-symbol distance tree) are themselves encoded as canonical Huffman codes by giving the bit length of the code for each symbol. The bit lengths are themselves run-length encoded to produce as compact a representation as possible. As an alternative to including the tree representation, the "static tree" option provides standard fixed Huffman trees. The compressed size using the static trees can be computed using the same statistics (the number of times each symbol appears) as are used to generate the dynamic trees, so it is easy for a compressor to choose whichever is smaller.

Encoder/compressor[edit]

During the compression stage, it is the encoder that chooses the amount of time spent looking for matching strings. The zlib/gzip reference implementation allows the user to select from a sliding scale of likely resulting compression-level vs. speed of encoding. Options range from (do not attempt compression, just store uncompressed) to representing the maximum capability of the reference implementation in zlib/gzip.

Other Deflate encoders have been produced, all of which will also produce a compatible bitstream capable of being decompressed by any existing Deflate decoder. Differing implementations will likely produce variations on the final encoded bit-stream produced. The focus with non-zlib versions of an encoder has normally been to produce a more efficiently compressed and smaller encoded stream.

Deflate64/Enhanced Deflate[edit]

Deflate64, specified by PKWARE, is a proprietary variant of Deflate. It's fundamentally the same algorithm. What has changed is the increase in dictionary size from 32 KB to 64 KB, an extension of the distance codes to 16 bits so that they may address a range of 64 KB, and the length code, which is extended to 16 bits so that it may define lengths of three to 65,538 bytes.^[4] This leads to Deflate64 having a longer compression time, and potentially a slightly higher compression ratio, than Deflate.^[5] Several free and/or open source projects support Deflate64, such as 7-Zip,^[6] while others, such as zlib, do not, as a result of the proprietary nature of the procedure^[7] and the very modest performance increase over Deflate.^[8]

Using Deflate in new software[edit]

Implementations of Deflate are freely available in many languages. C programs typically use the zlib library (licensed under the zlib License, which allows use with both free and proprietary software). Programs written using the Borland dialects of Pascal can use paszlib; a C++ library is included as part of 7-Zip/AdvanceCOMP. Java includes support as part of the standard library (in java.util.zip). Microsoft .NET Framework 2.0 base class library supports it in the System.IO.Compression namespace. Programs in Ada can use Zip-Ada (pure) or the ZLib-Ada thick binding to zlib.

Encoder implementations[edit]

• PKZIP: the first implementation, originally done by Phil Katz as part of PKZip.
• zlib/gzip: standard reference implementation used in a huge amount of software, owing to public availability of the source code and a license allowing inclusion into other software.
• Crypto++: contains a public domain implementation in C++ aimed mainly at reducing potential security vulnerabilities. The author, Wei Dai states "This code is less clever, but hopefully more understandable and maintainable [than zlib]".
• 7-Zip/AdvanceCOMP: written by Igor Pavlov in C++, this version is freely licensed and tends to achieve higher compression than zlib at the expense of CPU usage. Has an option to use the DEFLATE64 storage format.
• PuTTY 'sshzlib.c': a standalone implementation, capable of full decode, but static tree only creation, by Simon Tatham. MIT licensed.
• Plan 9 from Bell Labs operating system's libflate implements deflate compression.
• Hyperbac: uses its own proprietary lossless compression library (written in C++ and Assembly) with an option to implement the DEFLATE64 storage format.
• Zopfli: C implementation by Google that achieves highest compression at the expense of CPU usage. ZopfliPNG is a variation of Zopfli for use with PNGs. Apache licensed.
• igzip, an encoder written in x86 assembly released by Intel under the MIT License. 3x faster than zlib -1. Useful for compressing genomic data.^[9]

AdvanceCOMP uses the higher compression ratio version of Deflate as implemented by 7-Zip (or optionally Zopfli in recent versions) to enable recompression of gzip, PNG, MNG and ZIP files with the possibility of achieving smaller file sizes than zlib is able to at maximum settings.

Hardware encoders[edit]

• AHA361-PCIX/AHA362-PCIX from Comtech AHA. Comtech produced a PCI-X card (PCI-ID: ) capable of compressing streams using Deflate at a rate of up to 3.0 Gbit/s (375 MB/s) for incoming uncompressed data. Accompanying the Linux kerneldriver for the AHA361-PCIX is an "" utility and customised "" capable of using the hardware compression from Apache. The hardware is based on a XilinxVirtexFPGA and four custom AHA3601 ASICs. The AHA361/AHA362 boards are limited to only handling static Huffman blocks and require software to be modified to add support — the cards were not able to support the full Deflate specification, meaning they could only reliably decode their own output (a stream that did not contain any dynamic Huffman type 2 blocks).
• StorCompress 300/MX3 from Indra Networks. This is a range of PCI (PCI-ID: ) or PCI-X cards featuring between one and six compression engines with claimed processing speeds of up to 3.6 Gbit/s (450 MB/s). A version of the cards are available with the separate brand WebEnhance specifically designed for web-serving use rather than SAN or backup use; a PCIe revision, the MX4E is also produced.
• AHA363-PCIe/AHA364-PCIe/AHA367-PCIe. In 2008, Comtech started producing two PCIe cards (/) with a new hardware AHA3610 encoder chip. The new chip was designed to be capable of a sustained 2.5 Gbit/s. Using two of these chips, the AHA363-PCIe board can process Deflate at a rate of up to 5.0 Gbit/s (625 MB/s) using the two channels (two compression and two decompression). The AHA364-PCIe variant is an encode-only version of the card designed for out-going load balancers and instead has multiple register sets to allow 32 independent virtual compression channels feeding two physical compression engines. Linux, Microsoft Windows, and OpenSolaris kernel device drivers are available for both of the new cards, along with a modified zlib system library so that dynamically linked applications can automatically use the hardware support without internal modification. The AHA367-PCIe board () is similar to the AHA363-PCIe but uses four AHA3610 chips for a sustained compression rate of 10 Gbit/s (1250 MB/s). Unlike the AHA362-PCIX, the decompression engines on the AHA363-PCIe and AHA367-PCIe boards are fully deflate compliant.
• Nitrox and Octeon^{[permanent dead link]} processors from Cavium, Inc. contain high-speed hardware deflate and inflate engines compatible with both ZLIB and GZIP with some devices able to handle multiple simultaneous data streams.
• HDL-Deflate GPL FPGA implementation.
• Intel Communications Chipset 89xx Series (Cave Creek) for the IntelXeon E5-2600 and E5-2400 Processor Series (Sandy Bridge-EP/EN) supports hardware compression and decompression using QuickAssist Technology. Depending on the chipset, compression and decompression rates of 5Gbit/s, 10Gbit/s, or 20Gbit/s are available.^[10]

Decoder/decompressor[edit]

Inflate is the decoding process that takes a Deflate bit stream for decompression and correctly produces the original full-size data or file.

Inflate-only implementations[edit]

The normal intent with an alternative Inflate implementation is highly optimised decoding speed, or extremely predictable RAM usage for micro-controller embedded systems.

• C/C++
  • kunzip by Michael Kohn and unrelated to "KZIP". Comes with C source-code under the GNU LGPL license. Used in the GIMP installer.
  • puff.c (zlib), a small, unencumbered, single-file reference implementation included in the /contrib/puff directory of the zlib distribution.
  • tinf written by Jørgen Ibsen in ANSI C and comes with zlib license. Adds about 2k code.
  • tinfl.c (miniz), Public domain Inflate implementation contained entirely in a single C function.
• , Bob Flanders and Michael Holmes, published in PC Magazine 1994-01-11.
• inflate.cl by John Foderaro. Self-standing Common Lisp decoder distributed with a GNU LGPL license.
• inflate.s7i/gzip.s7i, a pure-Seed7 implementation of Deflate and gzip decompression, by Thomas Mertes. Made available under the GNU LGPL license.
• pyflate, a pure-Python stand-alone Deflate (gzip) and bzip2 decoder by Paul Sladen. Written for research/prototyping and made available under the BSD/GPL/LGPL/DFSG licenses.
• deflatelua, a pure-Lua implementation of Deflate and gzip/zlib decompression, by David Manura.
• inflate a pure-Javascript implementation of Inflate by Chris Dickinson
• pako: JavaScript speed-optimized port of zlib. Contains separate build with inflate only.

Hardware decoders[edit]

• Serial Inflate GPU from BitSim. Hardware implementation of Inflate. Part of BitSim's BADGE (Bitsim Accelerated Display Graphics Engine) controller offering for embedded systems.
• HDL-Deflate GPL FPGA implementation.

See also[edit]

References[edit]

External links[edit]

Marquis Compressor is a “universal” compressor AAX, AudioUnit and VST plugin for professional sound and music production applications.  You’ll find a very smooth compression performance in this compressor, coupled with a harmonically-rich sound, both suitable for mixing and mastering.  Being “universal” this compressor can be used on a wide range of sound material: individual tracks, stems and mixes, producing “clean” or “colored” sound.

Marquis Compressor plugin was built around a tube triode-modeled amplifier cascade.  At low Drive settings this cascade produces a mild harmonic coloration while at higher Drive settings you can get a brutal tube saturation which works great for drums, bass and vocals.  At moderate Drive settings this cascade can add a pleasant grit to the mix.

Marquis Compressor features a unique “round” signal level detection algorithm, which creates a very open, punchy, compressed sound with an impressive transient response.  Beside this, Marquis Compressor offers a classic feedback (opto) compression mode switchable to a more common feed-forward compression.

Marquis Compressor carries 3 distinctive compression algorithms, one of them (T3) being modeled after a classic analog compressor.  The Gate algorithm is also available which is handy at reducing drum bleed in drum tracks.