Short:        PVRG-JPEG library 1.2 and tools (68k and PPC)
Author:       (various), Andreas R. Kleinert (port)
Uploader:     Andreas_Kleinert t-online de
Type:         gfx/misc
Architecture: m68k-amigaos; ppc-powerup

 Changes for Amiga 68k/PPC port are documented in
 in "CHANGES.amiga". For usage information, please
 refer to "SETUP".

 PPC binary is called "jpeg.elf" and useable from Shell
 when being used with ppc.library V46+

 General information follows.

 --
 ARK, 7/Mar/99

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 Here's an excerpt from the documentation (parts left out by [...]):
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                 MPEG, CCITT H.261 (P*64), JPEG
  Image and Image sequence compression/decompression C software engines.


The Portable Video Research Group at Stanford have developed
image/image sequence compression and decompression engines (codecs)
for MPEG, CCITT H.261, and JPEG. The primary goal of these codecs is
to provide the functionality - these codecs are not optimized for
speed, rather completeness, and some of the code is kludgey.

Development of MPEG, P64, and JPEG engines has not been the primary
goal of the Portable Video Research Group.  Our research has been
focused on software and hardware for portable wireless digital video
communication.  The charter of this group ended in the summer of 1994.

[...]

III) PVRG-JPEG CODEC: (pub/jpeg/JPEGv1.2.tar.Z)

This public domain image encoder and decoder is based on the JPEG
Committee Draft.  It supports all of the baseline for encoding and
decoding.  The JPEG encoder is flexible in the variety of output
possible.  It also supports lossless coding, though not as speedy as
we would like.  The manual is approximately 50 pages long which
describes its use.  The display program for JFIF-style (YCbCr) files is
described in section IV) below.  The JFIF style is not a requirement
for this codec - it can compress and decompress CMYK, RGB, RGBalpha,
and other formats - this codec may be helpful if you wish to extract
information from non-JFIF encoded JPEG files.

This codec has been tested on publicly available JPEG data.  For
general purpose X display, you might want to try the program "xv"
(version 2.0 or greater).  The JPEG engine of the program "xv" is
based on the free, portable C code for JPEG compression available from
the Independent JPEG Group.  (anonymous login - ftp.uu.net (137.39.1.9
or 192.48.96.9) /graphics/jpeg/jpegsrc.v4.tar.Z).