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Yamaha BD-S1067 [93/98] About expat

■ About Expat

and Clark Cooper

Permission is hereby granted, free of charge, to any person obtaining a copy of this

software and associated documentation files (the “Software”), to deal in the Software

without restriction, including without limitation the rights to use, copy, modify, merge,

publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons

to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or

substantial portions of the Software.

THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY

KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE

WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR

PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS

OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR

OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR

OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE

SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

■ About cURL

Permission to use, copy, modify, and distribute this software for any purpose with or

without fee is hereby granted, provided that the above copyright notice and this

permission notice appear in all copies.

THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY

KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE

WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR

PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. IN NO

EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR

ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION

OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN

CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

THE SOFTWARE.

Except as contained in this notice, the name of a copyright holder shall not be used in

advertising or otherwise to promote the sale, use or other dealings in this Software

without prior written authorization of the copyright holder.

■ About Independent JPEG group

The Independent JPEG Group’s JPEG software

README for release 7 of 27-Jun-2009

This distribution contains the seventh public release of the Independent JPEG Group’s

free JPEG software. You are welcome to redistribute this software and to use it for any

purpose, subject to the conditions under LEGAL ISSUES, below.

This software is the work of Tom Lane, Guido Vollbeding, Philip Gladstone, Bill

Allombert, Jim Boucher, Lee Crocker, Bob Friesenhahn, Ben Jackson, Julian

Minguillon, Luis Ortiz, George Phillips, Davide Rossi, Ge’ Weijers, and other members

of the Independent JPEG Group.

IJG is not affiliated with the official ISO JPEG standards committee.

DOCUMENTATION ROADMAP

This file contains the following sections:

OVERVIEW General description of JPEG and the IJG software.

LEGAL ISSUES Copyright, lack of warranty, terms of distribution.

REFERENCES Where to learn more about JPEG.

ARCHIVE LOCATIONS Where to find newer versions of this software.

ACKNOWLEDGMENTS Special thanks.

FILE FORMAT WARS Software *not* to get.

TO DO Plans for future IJG releases.

Other documentation files in the distribution are:

User documentation:

install.txt How to configure and install the IJG software.

usage.txt Usage instructions for cjpeg, djpeg, jpegtran, rdjpgcom, and

wrjpgcom.

*.1 Unix-style man pages for programs (same info as usage.txt).

wizard.txt Advanced usage instructions for JPEG wizards only.

change.log Version-to-version change highlights.

Programmer and internal documentation:

libjpeg.txt How to use the JPEG library in your own programs.

example.c Sample code for calling the JPEG library.

structure.txt Overview of the JPEG library’s internal structure.

filelist.txt Road map of IJG files.

coderules.txt Coding style rules --- please read if you contribute code.

Please read at least the files install.txt and usage.txt. Some information can also be

found in the JPEG FAQ (Frequently Asked Questions) article. See ARCHIVE

LOCATIONS below to find out where to obtain the FAQ article.

If you want to understand how the JPEG code works, we suggest reading one or more

of the REFERENCES, then looking at the documentation files (in roughly the order

listed) before diving into the code.

OVERVIEW

This package contains C software to implement JPEG image encoding, decoding, and

transcoding. JPEG (pronounced “jay-peg”) is a standardized compression method for

full-color and gray-scale images.

This software implements JPEG baseline, extended-sequential, and progressive

compression processes. Provision is made for supporting all variants of these processes,

although some uncommon parameter settings aren’t implemented yet. We have made

no provision for supporting the hierarchical or lossless processes defined in the

standard.

We provide a set of library routines for reading and writing JPEG image files, plus two

sample applications “cjpeg” and “djpeg”, which use the library to perform conversion

between JPEG and some other popular image file formats. The library is intended to be

reused in other applications.

In order to support file conversion and viewing software, we have included

considerable functionality beyond the bare JPEG coding/decoding capability; for

example, the color quantization modules are not strictly part of JPEG decoding, but

they are essential for output to colormapped file formats or colormapped displays.

These extra functions can be compiled out of the library if not required for a particular

application.

We have also included “jpegtran”, a utility for lossless transcoding between different

JPEG processes, and “rdjpgcom” and “wrjpgcom”, two simple applications for

inserting and extracting textual comments in JFIF files.

The emphasis in designing this software has been on achieving portability and

flexibility, while also making it fast enough to be useful. In particular, the software is

not intended to be read as a tutorial on JPEG. (See the REFERENCES section for

introductory material.) Rather, it is intended to be reliable, portable, industrial-strength

code. We do not claim to have achieved that goal in every aspect of the software, but

we strive for it.

We welcome the use of this software as a component of commercial products. No

royalty is required, but we do ask for an acknowledgement in product documentation,

as described under LEGAL ISSUES.

LEGAL ISSUES

In plain English:

1. We don’t promise that this software works. (But if you find any bugs, please let us

know!)

2. You can use this software for whatever you want. You don’t have to pay us.

3. You may not pretend that you wrote this software. If you use it in a program, you

must acknowledge somewhere in your documentation that you’ve used the IJG code.

In legalese:

The authors make NO WARRANTY or representation, either express or implied, with

respect to this software, its quality, accuracy, merchantability, or fitness for a particular

purpose. This software is provided “AS IS”, and you, its user, assume the entire risk as

to its quality and accuracy.

Permission is hereby granted to use, copy, modify, and distribute this software (or

portions thereof) for any purpose, without fee, subject to these conditions:

(1) If any part of the source code for this software is distributed, then this README file

must be included, with this copyright and no-warranty notice unaltered; and any

additions, deletions, or changes to the original files must be clearly indicated in

accompanying documentation.

(2) If only executable code is distributed, then the accompanying documentation must

state that “this software is based in part on the work of the Independent JPEG Group”.

(3) Permission for use of this software is granted only if the user accepts full

responsibility for any undesirable consequences; the authors accept NO LIABILITY for

damages of any kind.

These conditions apply to any software derived from or based on the IJG code, not just

to the unmodified library. If you use our work, you ought to acknowledge us.

Permission is NOT granted for the use of any IJG author’s name or company name in

advertising or publicity relating to this software or products derived from it. This

software may be referred to only as “the Independent JPEG Group’s software”.

We specifically permit and encourage the use of this software as the basis of

commercial products, provided that all warranty or liability claims are assumed by the

product vendor.

ansi2knr.c is included in this distribution by permission of L. Peter Deutsch, sole

proprietor of its copyright holder, Aladdin Enterprises of Menlo Park, CA. ansi2knr.c is

NOT covered by the above copyright and conditions, but instead by the usual

distribution terms of the Free Software Foundation; principally, that you must include

source code if you redistribute it. (See the file ansi2knr.c for full details.) However,

since ansi2knr.c is not needed as part of any program generated from the IJG code, this

does not limit you more than the foregoing paragraphs do.

The Unix configuration script “configure” was produced with GNU Autoconf. It is

for its supporting scripts (config.guess, config.sub, ltmain.sh). Another support script,

install-sh, is copyright by X Consortium but is also freely distributable.

The IJG distribution formerly included code to read and write GIF files. To avoid

entanglement with the Unisys LZW patent, GIF reading support has been removed

altogether, and the GIF writer has been simplified to produce “uncompressed GIFs”.

This technique does not use the LZW algorithm; the resulting GIF files are larger than

usual, but are readable by all standard GIF decoders.

We are required to state that

“The Graphics Interchange Format(c) is the Copyright property of

CompuServe Incorporated. GIF(sm) is a Service Mark property of

CompuServe Incorporated.”

REFERENCES

We recommend reading one or more of these references before trying to understand the

innards of the JPEG software.

The best short technical introduction to the JPEG compression algorithm is

Wallace, Gregory K. “The JPEG Still Picture Compression Standard”,

Yamaha BD-S1067 [93/98] About expat

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