7213 lines
210 KiB
C++
7213 lines
210 KiB
C++
/*
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packJPG v2.5g (09/14/2013)
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~~~~~~~~~~~~~~~~~~~~~~~~~~
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packJPG is a compression program specially designed for further
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compression of JPEG images without causing any further loss. Typically
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it reduces the file size of a JPEG file by 20%.
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LGPL v3 license and special permissions
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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All programs in this package are free software; you can redistribute
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them and/or modify them under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either version 3
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of the License, or (at your option) any later version.
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The package is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
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General Public License for more details at
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http://www.gnu.org/copyleft/lgpl.html.
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If the LGPL v3 license is not compatible with your software project you
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might contact us and ask for a special permission to use the packJPG
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library under different conditions. In any case, usage of the packJPG
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algorithm under the LGPL v3 or above is highly advised and special
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permissions will only be given where necessary on a case by case basis.
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This offer is aimed mainly at closed source freeware developers seeking
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to add PJG support to their software projects.
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Copyright 2006...2013 by HTW Aalen University and Matthias Stirner.
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Usage of packJPG
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~~~~~~~~~~~~~~~~
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JPEG files are compressed and PJG files are decompressed using this
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command:
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"packJPG [file(s)]"
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packJPG recognizes file types on its own and decides whether to compress
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(JPG) or decompress (PJG). For unrecognized file types no action is
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taken. Files are recognized by content, not by extension.
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packJPG supports wildcards like "*.*" and drag and drop of multiple
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files. Filenames for output files are created automatically. In default
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mode, files are never overwritten. If a filename is already in use,
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packJPG creates a new filename by adding underscores.
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If "-" is used as a filename input from stdin is assumed and output is
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written to stdout. This can be useful for example if jpegtran is to be
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used as a preprocessor.
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Usage examples:
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"packJPG *.pjg"
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"packJPG lena.jpg"
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"packJPG kodim??.jpg"
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"packJPG - < sail.pjg > sail.jpg"
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Command line switches
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~~~~~~~~~~~~~~~~~~~~~
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-ver verify files after processing
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-v? level of verbosity; 0,1 or 2 is allowed (default 0)
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-np no pause after processing files
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-o overwrite existing files
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-p proceed on warnings
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-d discard meta-info
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By default, compression is cancelled on warnings. If warnings are
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skipped by using "-p", most files with warnings can also be compressed,
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but JPEG files reconstructed from PJG files might not be bitwise
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identical with the original JPEG files. There won't be any loss to
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image data or quality however.
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Unnecessary meta information can be discarded using "-d". This reduces
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compressed files' sizes. Be warned though, reconstructed files won't be
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bitwise identical with the original files and meta information will be
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lost forever. As with "-p" there won't be any loss to image data or
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quality.
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There is no known case in which a file compressed by packJPG (without
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the "-p" option, see above) couldn't be reconstructed to exactly the
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state it was before. If you want an additional layer of safety you can
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also use the verify option "-ver". In this mode, files are compressed,
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then decompressed and the decompressed file compared to the original
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file. If this test doesn't pass there will be an error message and the
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compressed file won't be written to the drive.
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Please note that the "-ver" option should never be used in conjunction
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with the "-d" and/or "-p" options. As stated above, the "-p" and "-d"
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options will most likely lead to reconstructed JPG files not being
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bitwise identical to the original JPG files. In turn, the verification
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process may fail on various files although nothing actually went wrong.
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Usage examples:
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"packJPG -v1 -o baboon.pjg"
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"packJPG -ver lena.jpg"
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"packJPG -d tiffany.jpg"
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"packJPG -p *.jpg"
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Known Limitations
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~~~~~~~~~~~~~~~~~
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packJPG is a compression program specially for JPEG files, so it doesn't
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compress other file types.
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packJPG has low error tolerance. JPEG files might not work with packJPG
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even if they work perfectly with other image processing software. The
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command line switch "-p" can be used to increase error tolerance and
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compatibility.
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If you try to drag and drop to many files at once, there might be a
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windowed error message about missing privileges. In that case you can
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try it again with less files or consider using the command prompt.
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packJPG has been tested to work perfectly with thousands of files from
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the command line. This issue also happens with drag and drop in other
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applications, so it might not be a limitation of packJPG but a
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limitation of Windows.
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Compressed PJG files are not compatible between different packJPG
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versions. You will get an error message if you try to decompress PJG
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files with a different version than the one used for compression. You
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may download older versions of packJPG from:
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http://www.elektronik.htw-aalen.de/packJPG/binaries/old/
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Open source release / developer info
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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The packJPG source codes is found inside the "source" subdirectory.
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Additional documents aimed to developers, containing detailed
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instructions on compiling the source code and using special
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functionality, are included in the "packJPG" subdirectory.
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History
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~~~~~~~
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v1.9a (04/20/2007) (non public)
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- first released version
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- only for testing purposes
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v2.0 (05/28/2007) (public)
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- first public version of packJPG
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- minor improvements to overall compression
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- minor bugfixes
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v2.2 (08/05/2007) (public)
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- around 40% faster compression & decompression
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- major improvements to overall compression (around 2% on average)
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- reading from stdin, writing to stdout
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- smaller executable
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- minor bugfixes
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- various minor improvements
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v2.3 (09/18/2007) (public)
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- compatibility with JPEG progressive mode
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- compatibility with JPEG extended sequential mode
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- compatibility with the CMYK color space
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- compatibility with older CPUs
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- around 15% faster compression & decompression
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- new switch: [-d] (discard meta-info)
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- various bugfixes
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v2.3a (11/21/2007) (public)
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- crash issue with certain images fixed
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- compatibility with packJPG v2.3 maintained
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v2.3b (12/20/2007) (public)
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- some minor errors in the packJPG library fixed
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- compatibility with packJPG v2.3 maintained
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v2.4 (03/24/2010) (public)
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- major improvements (1%...2%) to overall compression
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- around 10% faster compression & decompression
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- major improvements to JPG compatibility
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- size of executable reduced to ~33%
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- new switch: [-ver] (verify file after processing)
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- new switch: [-np] (no pause after processing)
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- new progress bar output mode
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- arithmetic coding routines rewritten from scratch
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- various smaller improvements to numerous to list here
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- new SFX (self extracting) archive format
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v2.5 (11/11/2011) (public)
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- improvements (~0.5%) to overall compression
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- several minor bugfixes
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- major code cleanup
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- removed packJPX from the package
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- added packARC to the package
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- packJPG is now open source!
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v2.5a (11/21/11) (public)
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- source code compatibility improvements (Gerhard Seelmann)
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- avoid some compiler warnings (Gerhard Seelmann)
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- source code clean up (Gerhard Seelmann)
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v2.5b (01/27/12) (public)
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- further removal of redundant code
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- some fixes for the packJPG static library
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- compiler fix for Mac OS (thanks to Sergio Lopez)
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- improved compression ratio calculation
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- eliminated the need for temp files
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v2.5c (04/13/12) (public)
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- various source code optimizations
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v2.5d (07/03/12) (public)
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- fixed a rare bug with progressive JPEG
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v2.5e (07/03/12) (public)
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- some minor source code optimizations
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- changed packJPG licensing to LGPL
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- moved packARC to a separate package
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v2.5f (02/24/13) (public)
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- fixed a minor bug in the JPG parser (thanks to Stephan Busch)
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v2.5g (09/14/13) (public)
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- fixed a rare crash bug with manipulated JPEG files
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Acknowledgements
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~~~~~~~~~~~~~~~~
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packJPG is the result of countless hours of research and development. It
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is part of my final year project for Hochschule Aalen.
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Prof. Dr. Gerhard Seelmann from Hochschule Aalen supported my
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development of packJPG with his extensive knowledge in the field of data
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compression. Without his advice, packJPG would not be possible.
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The official homepage of packJPG is currently maintained by Hochschule
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Aalen staff.
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packJPG logo and icon are designed by Michael Kaufmann.
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Contact
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~~~~~~~
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The official home of packJPG:
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http://www.elektronik.htw-aalen.de/packjpg/
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For questions and bug reports:
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packjpg (at) htw-aalen.de
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____________________________________
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packJPG by Matthias Stirner, 09/2013
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <math.h>
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#include <ctime>
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#include "bitops.h"
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#include "aricoder.h"
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#include "pjpgtbl.h"
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#include "dct8x8.h"
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#if defined BUILD_DLL // define BUILD_LIB from the compiler options if you want to compile a DLL!
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#define BUILD_LIB
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#endif
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#if defined BUILD_LIB // define BUILD_LIB as compiler option if you want to compile a library!
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#include "packjpglib.h"
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#endif
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#define INTERN static
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#define INIT_MODEL_S(a,b,c) new model_s( a, b, c, 255 )
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#define INIT_MODEL_B(a,b) new model_b( a, b, 255 )
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// #define USE_PLOCOI // uncomment to use loco-i predictor instead of 1DDCT predictor
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// #define DEV_BUILD // uncomment to include developer functions
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// #define DEV_INFOS // uncomment to include developer information
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#define QUANT(cm,bp) ( cmpnfo[cm].qtable[ bp ] )
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#define MAX_V(cm,bp) ( ( QUANT(cm,bp) > 0 ) ? ( ( freqmax[bp] + QUANT(cm,bp) - 1 ) / QUANT(cm,bp) ) : 0 )
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// #define QUN_V(v,cm,bp) ( ( QUANT(cm,bp) > 0 ) ? ( ( v > 0 ) ? ( v + (QUANT(cm,bp)/2) ) / QUANT(cm,bp) : ( v - (QUANT(cm,bp)/2) ) / QUANT(cm,bp) ) : 0 )
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#define ENVLI(s,v) ( ( v > 0 ) ? v : ( v - 1 ) + ( 1 << s ) )
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#define DEVLI(s,n) ( ( n >= ( 1 << (s - 1) ) ) ? n : n + 1 - ( 1 << s ) )
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#define E_ENVLI(s,v) ( v - ( 1 << s ) )
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#define E_DEVLI(s,n) ( n + ( 1 << s ) )
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#define ABS(v1) ( (v1 < 0) ? -v1 : v1 )
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#define ABSDIFF(v1,v2) ( (v1 > v2) ? (v1 - v2) : (v2 - v1) )
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#define IPOS(w,v,h) ( ( v * w ) + h )
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#define NPOS(n1,n2,p) ( ( ( p / n1 ) * n2 ) + ( p % n1 ) )
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#define ROUND_F(v1) ( (v1 < 0) ? (int) (v1 - 0.5) : (int) (v1 + 0.5) )
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#define DIV_INT(v1,v2) ( (v1 < 0) ? (v1 - (v2>>1)) / v2 : (v1 + (v2>>1)) / v2 )
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#define B_SHORT(v1,v2) ( ( ((int) v1) << 8 ) + ((int) v2) )
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#define BITLEN1024P(v) ( pbitlen_0_1024[ v ] )
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#define BITLEN2048N(v) ( (pbitlen_n2048_2047+2048)[ v ] )
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#define CLAMPED(l,h,v) ( ( v < l ) ? l : ( v > h ) ? h : v )
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#define MEM_ERRMSG "out of memory error"
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#define FRD_ERRMSG "could not read file / file not found: %s"
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#define FWR_ERRMSG "could not write file / file write-protected: %s"
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#define MSG_SIZE 128
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#define BARLEN 36
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/* -----------------------------------------------
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struct declarations
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----------------------------------------------- */
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struct componentInfo {
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unsigned short* qtable; // quantization table
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int huffdc; // no of huffman table (DC)
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int huffac; // no of huffman table (AC)
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int sfv; // sample factor vertical
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int sfh; // sample factor horizontal
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int mbs; // blocks in mcu
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int bcv; // block count vertical (interleaved)
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int bch; // block count horizontal (interleaved)
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int bc; // block count (all) (interleaved)
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int ncv; // block count vertical (non interleaved)
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int nch; // block count horizontal (non interleaved)
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int nc; // block count (all) (non interleaved)
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int sid; // statistical identity
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int jid; // jpeg internal id
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};
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struct huffCodes {
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unsigned short cval[ 256 ];
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unsigned short clen[ 256 ];
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unsigned short max_eobrun;
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};
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struct huffTree {
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unsigned short l[ 256 ];
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unsigned short r[ 256 ];
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};
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/* -----------------------------------------------
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function declarations: main interface
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----------------------------------------------- */
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#if !defined( BUILD_LIB )
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INTERN void initialize_options( int argc, char** argv );
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INTERN void process_ui( void );
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INTERN inline const char* get_status( bool (*function)() );
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INTERN void show_help( void );
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#endif
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INTERN void process_file( void );
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INTERN void execute( bool (*function)() );
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/* -----------------------------------------------
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function declarations: main functions
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----------------------------------------------- */
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#if !defined( BUILD_LIB )
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INTERN bool check_file( void );
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INTERN bool swap_streams( void );
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INTERN bool compare_output( void );
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#endif
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INTERN bool reset_buffers( void );
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INTERN bool read_jpeg( void );
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INTERN bool merge_jpeg( void );
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INTERN bool decode_jpeg( void );
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INTERN bool recode_jpeg( void );
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INTERN bool adapt_icos( void );
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INTERN bool predict_dc( void );
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INTERN bool unpredict_dc( void );
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INTERN bool check_value_range( void );
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INTERN bool calc_zdst_lists( void );
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INTERN bool pack_pjg( void );
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INTERN bool unpack_pjg( void );
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/* -----------------------------------------------
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function declarations: jpeg-specific
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----------------------------------------------- */
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INTERN bool jpg_setup_imginfo( void );
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INTERN bool jpg_parse_jfif( unsigned char type, unsigned int len, unsigned char* segment );
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INTERN bool jpg_rebuild_header( void );
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INTERN int jpg_decode_block_seq( abitreader* huffr, huffTree* dctree, huffTree* actree, short* block );
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INTERN int jpg_encode_block_seq( abitwriter* huffw, huffCodes* dctbl, huffCodes* actbl, short* block );
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INTERN int jpg_decode_dc_prg_fs( abitreader* huffr, huffTree* dctree, short* block );
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INTERN int jpg_encode_dc_prg_fs( abitwriter* huffw, huffCodes* dctbl, short* block );
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INTERN int jpg_decode_ac_prg_fs( abitreader* huffr, huffTree* actree, short* block,
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int* eobrun, int from, int to );
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INTERN int jpg_encode_ac_prg_fs( abitwriter* huffw, huffCodes* actbl, short* block,
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int* eobrun, int from, int to );
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INTERN int jpg_decode_dc_prg_sa( abitreader* huffr, short* block );
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INTERN int jpg_encode_dc_prg_sa( abitwriter* huffw, short* block );
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INTERN int jpg_decode_ac_prg_sa( abitreader* huffr, huffTree* actree, short* block,
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int* eobrun, int from, int to );
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INTERN int jpg_encode_ac_prg_sa( abitwriter* huffw, abytewriter* storw, huffCodes* actbl,
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short* block, int* eobrun, int from, int to );
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INTERN int jpg_decode_eobrun_sa( abitreader* huffr, short* block, int* eobrun, int from, int to );
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INTERN int jpg_encode_eobrun( abitwriter* huffw, huffCodes* actbl, int* eobrun );
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INTERN int jpg_encode_crbits( abitwriter* huffw, abytewriter* storw );
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INTERN int jpg_next_huffcode( abitreader *huffw, huffTree *ctree );
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INTERN int jpg_next_mcupos( int* mcu, int* cmp, int* csc, int* sub, int* dpos, int* rstw );
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INTERN int jpg_next_mcuposn( int* cmp, int* dpos, int* rstw );
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INTERN int jpg_skip_eobrun( int* cmp, int* dpos, int* rstw, int* eobrun );
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INTERN void jpg_build_huffcodes( unsigned char *clen, unsigned char *cval,
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huffCodes *hc, huffTree *ht );
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/* -----------------------------------------------
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function declarations: pjg-specific
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----------------------------------------------- */
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INTERN bool pjg_encode_zstscan( aricoder* enc, int cmp );
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INTERN bool pjg_encode_zdst_high( aricoder* enc, int cmp );
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INTERN bool pjg_encode_zdst_low( aricoder* enc, int cmp );
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INTERN bool pjg_encode_dc( aricoder* enc, int cmp );
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INTERN bool pjg_encode_ac_high( aricoder* enc, int cmp );
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INTERN bool pjg_encode_ac_low( aricoder* enc, int cmp );
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INTERN bool pjg_encode_generic( aricoder* enc, unsigned char* data, int len );
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INTERN bool pjg_encode_bit( aricoder* enc, unsigned char bit );
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INTERN bool pjg_decode_zstscan( aricoder* dec, int cmp );
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INTERN bool pjg_decode_zdst_high( aricoder* dec, int cmp );
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INTERN bool pjg_decode_zdst_low( aricoder* dec, int cmp );
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INTERN bool pjg_decode_dc( aricoder* dec, int cmp );
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INTERN bool pjg_decode_ac_high( aricoder* dec, int cmp );
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INTERN bool pjg_decode_ac_low( aricoder* dec, int cmp );
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INTERN bool pjg_decode_generic( aricoder* dec, unsigned char** data, int* len );
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INTERN bool pjg_decode_bit( aricoder* dec, unsigned char* bit );
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INTERN void pjg_get_zerosort_scan( unsigned char* sv, int cmp );
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INTERN bool pjg_optimize_header( void );
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INTERN bool pjg_unoptimize_header( void );
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INTERN void pjg_aavrg_prepare( unsigned short** abs_coeffs, int* weights, unsigned short* abs_store, int cmp );
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INTERN int pjg_aavrg_context( unsigned short** abs_coeffs, int* weights, int pos, int p_y, int p_x, int r_x );
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INTERN int pjg_lakh_context( signed short** coeffs_x, signed short** coeffs_a, int* pred_cf, int pos );
|
|
INTERN void get_context_nnb( int pos, int w, int *a, int *b );
|
|
|
|
|
|
/* -----------------------------------------------
|
|
function declarations: DCT
|
|
----------------------------------------------- */
|
|
|
|
#if !defined(BUILD_LIB) && defined(DEV_BUILD)
|
|
INTERN int idct_2d_fst_8x8( int cmp, int dpos, int ix, int iy );
|
|
#endif
|
|
INTERN int idct_2d_fst_1x8( int cmp, int dpos, int ix, int iy );
|
|
INTERN int idct_2d_fst_8x1( int cmp, int dpos, int ix, int iy );
|
|
|
|
|
|
/* -----------------------------------------------
|
|
function declarations: prediction
|
|
----------------------------------------------- */
|
|
|
|
#if defined( USE_PLOCOI )
|
|
INTERN int dc_coll_predictor( int cmp, int dpos );
|
|
#else
|
|
INTERN int dc_1ddct_predictor( int cmp, int dpos );
|
|
#endif
|
|
INTERN inline int plocoi( int a, int b, int c );
|
|
INTERN inline int median_int( int* values, int size );
|
|
INTERN inline float median_float( float* values, int size );
|
|
|
|
|
|
/* -----------------------------------------------
|
|
function declarations: miscelaneous helpers
|
|
----------------------------------------------- */
|
|
#if !defined( BUILD_LIB )
|
|
INTERN inline void progress_bar( int current, int last );
|
|
INTERN inline char* create_filename( const char* base, const char* extension );
|
|
INTERN inline char* unique_filename( const char* base, const char* extension );
|
|
INTERN inline void set_extension( char* filename, const char* extension );
|
|
INTERN inline void add_underscore( char* filename );
|
|
#endif
|
|
INTERN inline bool file_exists( const char* filename );
|
|
|
|
|
|
/* -----------------------------------------------
|
|
function declarations: developers functions
|
|
----------------------------------------------- */
|
|
|
|
// these are developers functions, they are not needed
|
|
// in any way to compress jpg or decompress pjg
|
|
#if !defined(BUILD_LIB) && defined(DEV_BUILD)
|
|
INTERN int collmode = 0; // write mode for collections: 0 -> std, 1 -> dhf, 2 -> squ, 3 -> unc
|
|
INTERN bool dump_hdr( void );
|
|
INTERN bool dump_huf( void );
|
|
INTERN bool dump_coll( void );
|
|
INTERN bool dump_zdst( void );
|
|
INTERN bool dump_file( const char* base, const char* ext, void* data, int bpv, int size );
|
|
INTERN bool dump_errfile( void );
|
|
INTERN bool dump_info( void );
|
|
INTERN bool dump_dist( void );
|
|
INTERN bool dump_pgm( void );
|
|
#endif
|
|
|
|
|
|
/* -----------------------------------------------
|
|
global variables: library only variables
|
|
----------------------------------------------- */
|
|
#if defined(BUILD_LIB)
|
|
INTERN int lib_in_type = -1;
|
|
INTERN int lib_out_type = -1;
|
|
#endif
|
|
|
|
|
|
/* -----------------------------------------------
|
|
global variables: data storage
|
|
----------------------------------------------- */
|
|
|
|
INTERN unsigned short qtables[4][64]; // quantization tables
|
|
INTERN huffCodes hcodes[2][4]; // huffman codes
|
|
INTERN huffTree htrees[2][4]; // huffman decoding trees
|
|
INTERN unsigned char htset[2][4]; // 1 if huffman table is set
|
|
|
|
INTERN unsigned char* grbgdata = NULL; // garbage data
|
|
INTERN unsigned char* hdrdata = NULL; // header data
|
|
INTERN unsigned char* huffdata = NULL; // huffman coded data
|
|
INTERN int hufs = 0 ; // size of huffman data
|
|
INTERN int hdrs = 0 ; // size of header
|
|
INTERN int grbs = 0 ; // size of garbage
|
|
|
|
INTERN unsigned int* rstp = NULL; // restart markers positions in huffdata
|
|
INTERN unsigned int* scnp = NULL; // scan start positions in huffdata
|
|
INTERN int rstc = 0 ; // count of restart markers
|
|
INTERN int scnc = 0 ; // count of scans
|
|
INTERN int rsti = 0 ; // restart interval
|
|
INTERN char padbit = -1 ; // padbit (for huffman coding)
|
|
INTERN unsigned char* rst_err = NULL; // number of wrong-set RST markers per scan
|
|
|
|
INTERN unsigned char* zdstdata[4] = { NULL }; // zero distribution (# of non-zeroes) lists (for higher 7x7 block)
|
|
INTERN unsigned char* eobxhigh[4] = { NULL }; // eob in x direction (for higher 7x7 block)
|
|
INTERN unsigned char* eobyhigh[4] = { NULL }; // eob in y direction (for higher 7x7 block)
|
|
INTERN unsigned char* zdstxlow[4] = { NULL }; // # of non zeroes for first row
|
|
INTERN unsigned char* zdstylow[4] = { NULL }; // # of non zeroes for first collumn
|
|
INTERN signed short* colldata[4][64] = {{NULL}}; // collection sorted DCT coefficients
|
|
|
|
INTERN unsigned char* freqscan[4] = { NULL }; // optimized order for frequency scans (only pointers to scans)
|
|
INTERN unsigned char zsrtscan[4][64]; // zero optimized frequency scan
|
|
|
|
INTERN int adpt_idct_8x8[ 4 ][ 8 * 8 * 8 * 8 ]; // precalculated/adapted values for idct (8x8)
|
|
INTERN int adpt_idct_1x8[ 4 ][ 1 * 1 * 8 * 8 ]; // precalculated/adapted values for idct (1x8)
|
|
INTERN int adpt_idct_8x1[ 4 ][ 8 * 8 * 1 * 1 ]; // precalculated/adapted values for idct (8x1)
|
|
|
|
|
|
/* -----------------------------------------------
|
|
global variables: info about image
|
|
----------------------------------------------- */
|
|
|
|
// seperate info for each color component
|
|
INTERN componentInfo cmpnfo[ 4 ];
|
|
|
|
INTERN int cmpc = 0; // component count
|
|
INTERN int imgwidth = 0; // width of image
|
|
INTERN int imgheight = 0; // height of image
|
|
|
|
INTERN int sfhm = 0; // max horizontal sample factor
|
|
INTERN int sfvm = 0; // max verical sample factor
|
|
INTERN int mcuv = 0; // mcus per line
|
|
INTERN int mcuh = 0; // mcus per collumn
|
|
INTERN int mcuc = 0; // count of mcus
|
|
|
|
|
|
/* -----------------------------------------------
|
|
global variables: info about current scan
|
|
----------------------------------------------- */
|
|
|
|
INTERN int cs_cmpc = 0 ; // component count in current scan
|
|
INTERN int cs_cmp[ 4 ] = { 0 }; // component numbers in current scan
|
|
INTERN int cs_from = 0 ; // begin - band of current scan ( inclusive )
|
|
INTERN int cs_to = 0 ; // end - band of current scan ( inclusive )
|
|
INTERN int cs_sah = 0 ; // successive approximation bit pos high
|
|
INTERN int cs_sal = 0 ; // successive approximation bit pos low
|
|
|
|
|
|
/* -----------------------------------------------
|
|
global variables: info about files
|
|
----------------------------------------------- */
|
|
|
|
INTERN char* jpgfilename = NULL; // name of JPEG file
|
|
INTERN char* pjgfilename = NULL; // name of PJG file
|
|
INTERN int jpgfilesize; // size of JPEG file
|
|
INTERN int pjgfilesize; // size of PJG file
|
|
INTERN int jpegtype = 0; // type of JPEG coding: 0->unknown, 1->sequential, 2->progressive
|
|
INTERN int filetype; // type of current file
|
|
INTERN iostream* str_in = NULL; // input stream
|
|
INTERN iostream* str_out = NULL; // output stream
|
|
|
|
#if !defined(BUILD_LIB)
|
|
INTERN iostream* str_str = NULL; // storage stream
|
|
|
|
INTERN char** filelist = NULL; // list of files to process
|
|
INTERN int file_cnt = 0; // count of files in list
|
|
INTERN int file_no = 0; // number of current file
|
|
|
|
INTERN char** err_list = NULL; // list of error messages
|
|
INTERN int* err_tp = NULL; // list of error types
|
|
#endif
|
|
|
|
#if defined(DEV_INFOS)
|
|
INTERN int dev_size_hdr = 0;
|
|
INTERN int dev_size_cmp[ 4 ] = { 0 };
|
|
INTERN int dev_size_zsr[ 4 ] = { 0 };
|
|
INTERN int dev_size_dc[ 4 ] = { 0 };
|
|
INTERN int dev_size_ach[ 4 ] = { 0 };
|
|
INTERN int dev_size_acl[ 4 ] = { 0 };
|
|
INTERN int dev_size_zdh[ 4 ] = { 0 };
|
|
INTERN int dev_size_zdl[ 4 ] = { 0 };
|
|
#endif
|
|
|
|
|
|
/* -----------------------------------------------
|
|
global variables: messages
|
|
----------------------------------------------- */
|
|
|
|
INTERN char errormessage [ MSG_SIZE ];
|
|
INTERN bool (*errorfunction)();
|
|
INTERN int errorlevel;
|
|
// meaning of errorlevel:
|
|
// -1 -> wrong input
|
|
// 0 -> no error
|
|
// 1 -> warning
|
|
// 2 -> fatal error
|
|
|
|
|
|
/* -----------------------------------------------
|
|
global variables: settings
|
|
----------------------------------------------- */
|
|
|
|
#if !defined( BUILD_LIB )
|
|
INTERN int verbosity = -1; // level of verbosity
|
|
INTERN bool overwrite = false; // overwrite files yes / no
|
|
INTERN bool wait_exit = true; // pause after finished yes / no
|
|
INTERN int verify_lv = 0; // verification level ( none (0), simple (1), detailed output (2) )
|
|
INTERN int err_tol = 1; // error threshold ( proceed on warnings yes (2) / no (1) )
|
|
INTERN bool disc_meta = false; // discard meta-info yes / no
|
|
|
|
INTERN bool developer = false; // allow developers functions yes/no
|
|
INTERN bool auto_set = true; // automatic find best settings yes/no
|
|
INTERN int action = A_COMPRESS;// what to do with JPEG/PJG files
|
|
|
|
INTERN FILE* msgout = stdout;// stream for output of messages
|
|
INTERN bool pipe_on = false; // use stdin/stdout instead of filelist
|
|
#else
|
|
INTERN int err_tol = 1; // error threshold ( proceed on warnings yes (2) / no (1) )
|
|
INTERN bool disc_meta = false; // discard meta-info yes / no
|
|
INTERN bool auto_set = true; // automatic find best settings yes/no
|
|
INTERN int action = A_COMPRESS;// what to do with JPEG/PJG files
|
|
#endif
|
|
|
|
INTERN unsigned char nois_trs[ 4 ] = {6,6,6,6}; // bit pattern noise threshold
|
|
INTERN unsigned char segm_cnt[ 4 ] = {10,10,10,10}; // number of segments
|
|
#if !defined( BUILD_LIB )
|
|
INTERN unsigned char orig_set[ 8 ] = { 0 }; // store array for settings
|
|
#endif
|
|
|
|
|
|
/* -----------------------------------------------
|
|
global variables: info about program
|
|
----------------------------------------------- */
|
|
|
|
INTERN const unsigned char appversion = 25;
|
|
INTERN const char* subversion = "g";
|
|
INTERN const char* apptitle = "packJPG";
|
|
INTERN const char* appname = "packjpg";
|
|
INTERN const char* versiondate = "09/14/2013";
|
|
INTERN const char* author = "Matthias Stirner / Se";
|
|
#if !defined(BUILD_LIB)
|
|
INTERN const char* website = "http://www.elektronik.htw-aalen.de/packjpg/";
|
|
INTERN const char* copyright = "2006-2013 HTW Aalen University & Matthias Stirner";
|
|
INTERN const char* email = "packjpg (at) htw-aalen.de";
|
|
INTERN const char* pjg_ext = "pjg";
|
|
INTERN const char* jpg_ext = "jpg";
|
|
#endif
|
|
INTERN const char pjg_magic[] = { 'J', 'S' };
|
|
|
|
|
|
/* -----------------------------------------------
|
|
main-function
|
|
----------------------------------------------- */
|
|
|
|
#if !defined(BUILD_LIB)
|
|
int main( int argc, char** argv )
|
|
{
|
|
sprintf( errormessage, "no errormessage specified" );
|
|
|
|
clock_t begin, end;
|
|
|
|
int error_cnt = 0;
|
|
int warn_cnt = 0;
|
|
|
|
double acc_jpgsize = 0;
|
|
double acc_pjgsize = 0;
|
|
|
|
int kbps;
|
|
double cr;
|
|
double total;
|
|
|
|
errorlevel = 0;
|
|
|
|
|
|
// read options from command line
|
|
initialize_options( argc, argv );
|
|
|
|
// write program info to screen
|
|
fprintf( msgout, "\n--> %s v%i.%i%s (%s) by %s <--\n",
|
|
apptitle, appversion / 10, appversion % 10, subversion, versiondate, author );
|
|
fprintf( msgout, "Copyright %s\nAll rights reserved\n\n", copyright );
|
|
|
|
// check if user input is wrong, show help screen if it is
|
|
if ( ( file_cnt == 0 ) ||
|
|
( ( !developer ) && ( (action != A_COMPRESS) || (!auto_set) || (verify_lv > 1) ) ) ) {
|
|
show_help();
|
|
return -1;
|
|
}
|
|
|
|
// display warning if not using automatic settings
|
|
if ( !auto_set ) {
|
|
fprintf( msgout, " custom compression settings: \n" );
|
|
fprintf( msgout, " -------------------------------------------------\n" );
|
|
fprintf( msgout, " no of segments -> %3i[0] %3i[1] %3i[2] %3i[3]\n",
|
|
segm_cnt[0], segm_cnt[1], segm_cnt[2], segm_cnt[3] );
|
|
fprintf( msgout, " noise threshold -> %3i[0] %3i[1] %3i[2] %3i[3]\n",
|
|
nois_trs[0], nois_trs[1], nois_trs[2], nois_trs[3] );
|
|
fprintf( msgout, " -------------------------------------------------\n\n" );
|
|
}
|
|
|
|
// (re)set program has to be done first
|
|
reset_buffers();
|
|
|
|
// process file(s) - this is the main function routine
|
|
begin = clock();
|
|
for ( file_no = 0; file_no < file_cnt; file_no++ ) {
|
|
// process current file
|
|
process_ui();
|
|
// store error message and type if any
|
|
if ( errorlevel > 0 ) {
|
|
err_list[ file_no ] = (char*) calloc( MSG_SIZE, sizeof( char ) );
|
|
err_tp[ file_no ] = errorlevel;
|
|
if ( err_list[ file_no ] != NULL )
|
|
strcpy( err_list[ file_no ], errormessage );
|
|
}
|
|
// count errors / warnings / file sizes
|
|
if ( errorlevel >= err_tol ) error_cnt++;
|
|
else {
|
|
if ( errorlevel == 1 ) warn_cnt++;
|
|
acc_jpgsize += jpgfilesize;
|
|
acc_pjgsize += pjgfilesize;
|
|
}
|
|
}
|
|
end = clock();
|
|
|
|
// errors summary: only needed for -v2 or progress bar
|
|
if ( ( verbosity == -1 ) || ( verbosity == 2 ) ) {
|
|
// print summary of errors to screen
|
|
if ( error_cnt > 0 ) {
|
|
fprintf( stderr, "\n\nfiles with errors:\n" );
|
|
fprintf( stderr, "------------------\n" );
|
|
for ( file_no = 0; file_no < file_cnt; file_no++ ) {
|
|
if ( err_tp[ file_no ] >= err_tol ) {
|
|
fprintf( stderr, "%s (%s)\n", filelist[ file_no ], err_list[ file_no ] );
|
|
}
|
|
}
|
|
}
|
|
// print summary of warnings to screen
|
|
if ( warn_cnt > 0 ) {
|
|
fprintf( stderr, "\n\nfiles with warnings:\n" );
|
|
fprintf( stderr, "------------------\n" );
|
|
for ( file_no = 0; file_no < file_cnt; file_no++ ) {
|
|
if ( err_tp[ file_no ] == 1 ) {
|
|
fprintf( stderr, "%s (%s)\n", filelist[ file_no ], err_list[ file_no ] );
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// show statistics
|
|
fprintf( msgout, "\n\n-> %i file(s) processed, %i error(s), %i warning(s)\n",
|
|
file_cnt, error_cnt, warn_cnt );
|
|
if ( ( file_cnt > error_cnt ) && ( verbosity != 0 ) &&
|
|
( action == A_COMPRESS ) ) {
|
|
acc_jpgsize /= 1024.0; acc_pjgsize /= 1024.0;
|
|
total = (double) ( end - begin ) / CLOCKS_PER_SEC;
|
|
kbps = ( total > 0 ) ? ( acc_jpgsize / total ) : acc_jpgsize;
|
|
cr = ( acc_jpgsize > 0 ) ? ( 100.0 * acc_pjgsize / acc_jpgsize ) : 0;
|
|
|
|
fprintf( msgout, " --------------------------------- \n" );
|
|
if ( total >= 0 ) {
|
|
fprintf( msgout, " total time : %8.2f sec\n", total );
|
|
fprintf( msgout, " avrg. kbyte per s : %8i byte\n", kbps );
|
|
}
|
|
else {
|
|
fprintf( msgout, " total time : %8s sec\n", "N/A" );
|
|
fprintf( msgout, " avrg. kbyte per s : %8s byte\n", "N/A" );
|
|
}
|
|
fprintf( msgout, " avrg. comp. ratio : %8.2f %%\n", cr );
|
|
fprintf( msgout, " --------------------------------- \n" );
|
|
#if defined(DEV_INFOS)
|
|
if ( acc_jpgsize > 0 ) {
|
|
fprintf( msgout, " header %% : %8.2f %%\n", 100.0 * dev_size_hdr / acc_jpgsize );
|
|
if ( dev_size_cmp[0] > 0 ) fprintf( msgout, " component [0] %% : %8.2f %%\n", 100.0 * dev_size_cmp[0] / acc_jpgsize );
|
|
if ( dev_size_cmp[1] > 0 ) fprintf( msgout, " component [1] %% : %8.2f %%\n", 100.0 * dev_size_cmp[1] / acc_jpgsize );
|
|
if ( dev_size_cmp[2] > 0 ) fprintf( msgout, " component [2] %% : %8.2f %%\n", 100.0 * dev_size_cmp[2] / acc_jpgsize );
|
|
if ( dev_size_cmp[3] > 0 ) fprintf( msgout, " component [3] %% : %8.2f %%\n", 100.0 * dev_size_cmp[3] / acc_jpgsize );
|
|
fprintf( msgout, " --------------------------------- \n" );
|
|
for ( int i = 0; i < 4; i++ ) {
|
|
if ( dev_size_cmp[i] == 0 ) break;
|
|
fprintf( msgout, " ac coeffs h [%i] %% : %8.2f %%\n", i, 100.0 * dev_size_ach[i] / acc_jpgsize );
|
|
fprintf( msgout, " ac coeffs l [%i] %% : %8.2f %%\n", i, 100.0 * dev_size_acl[i] / acc_jpgsize );
|
|
fprintf( msgout, " dc coeffs [%i] %% : %8.2f %%\n", i, 100.0 * dev_size_dc[i] / acc_jpgsize );
|
|
fprintf( msgout, " zero dist h [%i] %% : %8.2f %%\n", i, 100.0 * dev_size_zdh[i] / acc_jpgsize );
|
|
fprintf( msgout, " zero dist l [%i] %% : %8.2f %%\n", i, 100.0 * dev_size_zdl[i] / acc_jpgsize );
|
|
fprintf( msgout, " zero sort [%i] %% : %8.2f %%\n", i, 100.0 * dev_size_zsr[i] / acc_jpgsize );
|
|
fprintf( msgout, " --------------------------------- \n" );
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
// pause before exit
|
|
if ( wait_exit && ( msgout != stderr ) ) {
|
|
fprintf( msgout, "\n\n< press ENTER >\n" );
|
|
fgetc( stdin );
|
|
}
|
|
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
/* ----------------------- Begin of library only functions -------------------------- */
|
|
|
|
/* -----------------------------------------------
|
|
DLL export converter function
|
|
----------------------------------------------- */
|
|
|
|
#if defined(BUILD_LIB)
|
|
EXPORT bool pjglib_convert_stream2stream( char* msg )
|
|
{
|
|
// process in main function
|
|
return pjglib_convert_stream2mem( NULL, NULL, msg );
|
|
}
|
|
#endif
|
|
|
|
|
|
/* -----------------------------------------------
|
|
DLL export converter function
|
|
----------------------------------------------- */
|
|
|
|
#if defined(BUILD_LIB)
|
|
EXPORT bool pjglib_convert_file2file( char* in, char* out, char* msg )
|
|
{
|
|
// init streams
|
|
pjglib_init_streams( (void*) in, 0, 0, (void*) out, 0 );
|
|
|
|
// process in main function
|
|
return pjglib_convert_stream2mem( NULL, NULL, msg );
|
|
}
|
|
#endif
|
|
|
|
|
|
/* -----------------------------------------------
|
|
DLL export converter function
|
|
----------------------------------------------- */
|
|
|
|
#if defined(BUILD_LIB)
|
|
EXPORT bool pjglib_convert_stream2mem( unsigned char** out_file, unsigned int* out_size, char* msg )
|
|
{
|
|
clock_t begin, end;
|
|
int total;
|
|
float cr;
|
|
|
|
|
|
// use automatic settings
|
|
auto_set = true;
|
|
|
|
// (re)set buffers
|
|
reset_buffers();
|
|
action = A_COMPRESS;
|
|
|
|
// main compression / decompression routines
|
|
begin = clock();
|
|
|
|
// process one file
|
|
process_file();
|
|
|
|
// fetch pointer and size of output (only for memory output)
|
|
if ( ( errorlevel < err_tol ) && ( lib_out_type == 1 ) &&
|
|
( out_file != NULL ) && ( out_size != NULL ) ) {
|
|
*out_size = str_out->getsize();
|
|
*out_file = str_out->getptr();
|
|
}
|
|
|
|
// close iostreams
|
|
if ( str_in != NULL ) delete( str_in ); str_in = NULL;
|
|
if ( str_out != NULL ) delete( str_out ); str_out = NULL;
|
|
|
|
end = clock();
|
|
|
|
// copy errormessage / remove files if error (and output is file)
|
|
if ( errorlevel >= err_tol ) {
|
|
if ( lib_out_type == 0 ) {
|
|
if ( filetype == F_JPG ) {
|
|
if ( file_exists( pjgfilename ) ) remove( pjgfilename );
|
|
} else if ( filetype == F_PJG ) {
|
|
if ( file_exists( jpgfilename ) ) remove( jpgfilename );
|
|
}
|
|
}
|
|
if ( msg != NULL ) strcpy( msg, errormessage );
|
|
return false;
|
|
}
|
|
|
|
// get compression info
|
|
total = (int) ( (double) (( end - begin ) * 1000) / CLOCKS_PER_SEC );
|
|
cr = ( jpgfilesize > 0 ) ? ( 100.0 * pjgfilesize / jpgfilesize ) : 0;
|
|
|
|
// write success message else
|
|
if ( msg != NULL ) {
|
|
switch( filetype )
|
|
{
|
|
case F_JPG:
|
|
sprintf( msg, "Compressed to %s (%.2f%%) in %ims",
|
|
pjgfilename, cr, ( total >= 0 ) ? total : -1 );
|
|
break;
|
|
case F_PJG:
|
|
sprintf( msg, "Decompressed to %s (%.2f%%) in %ims",
|
|
jpgfilename, cr, ( total >= 0 ) ? total : -1 );
|
|
break;
|
|
case F_UNK:
|
|
sprintf( msg, "Unknown filetype" );
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
return true;
|
|
}
|
|
#endif
|
|
|
|
|
|
/* -----------------------------------------------
|
|
DLL export init input (file/mem)
|
|
----------------------------------------------- */
|
|
|
|
#if defined(BUILD_LIB)
|
|
EXPORT void pjglib_init_streams( void* in_src, int in_type, int in_size, void* out_dest, int out_type )
|
|
{
|
|
/* a short reminder about input/output stream types:
|
|
|
|
if input is file
|
|
----------------
|
|
in_scr -> name of input file
|
|
in_type -> 0
|
|
in_size -> ignore
|
|
|
|
if input is memory
|
|
------------------
|
|
in_scr -> array containg data
|
|
in_type -> 1
|
|
in_size -> size of data array
|
|
|
|
if input is *FILE (f.e. stdin)
|
|
------------------------------
|
|
in_src -> stream pointer
|
|
in_type -> 2
|
|
in_size -> ignore
|
|
|
|
vice versa for output streams! */
|
|
|
|
unsigned char buffer[ 2 ];
|
|
|
|
|
|
// (re)set errorlevel
|
|
errorfunction = NULL;
|
|
errorlevel = 0;
|
|
jpgfilesize = 0;
|
|
pjgfilesize = 0;
|
|
|
|
// open input stream, check for errors
|
|
str_in = new iostream( in_src, in_type, in_size, 0 );
|
|
if ( str_in->chkerr() ) {
|
|
sprintf( errormessage, "error opening input stream" );
|
|
errorlevel = 2;
|
|
return;
|
|
}
|
|
|
|
// open output stream, check for errors
|
|
str_out = new iostream( out_dest, out_type, 0, 1 );
|
|
if ( str_out->chkerr() ) {
|
|
sprintf( errormessage, "error opening output stream" );
|
|
errorlevel = 2;
|
|
return;
|
|
}
|
|
|
|
// free memory from filenames if needed
|
|
if ( jpgfilename != NULL ) free( jpgfilename ); jpgfilename = NULL;
|
|
if ( pjgfilename != NULL ) free( pjgfilename ); pjgfilename = NULL;
|
|
|
|
// check input stream
|
|
str_in->read( buffer, 1, 2 );
|
|
if ( ( buffer[0] == 0xFF ) && ( buffer[1] == 0xD8 ) ) {
|
|
// file is JPEG
|
|
filetype = F_JPG;
|
|
// copy filenames
|
|
jpgfilename = (char*) calloc( ( in_type == 0 ) ? strlen( (char*) in_src ) + 1 : 32, sizeof( char ) );
|
|
pjgfilename = (char*) calloc( ( out_type == 0 ) ? strlen( (char*) out_dest ) + 1 : 32, sizeof( char ) );
|
|
strcpy( jpgfilename, ( in_type == 0 ) ? (char*) in_src : "JPG in memory" );
|
|
strcpy( pjgfilename, ( out_type == 0 ) ? (char*) out_dest : "PJG in memory" );
|
|
}
|
|
else if ( (buffer[0] == pjg_magic[0]) && (buffer[1] == pjg_magic[1]) ) {
|
|
// file is PJG
|
|
filetype = F_PJG;
|
|
// copy filenames
|
|
pjgfilename = (char*) calloc( ( in_type == 0 ) ? strlen( (char*) in_src ) + 1 : 32, sizeof( char ) );
|
|
jpgfilename = (char*) calloc( ( out_type == 0 ) ? strlen( (char*) out_dest ) + 1 : 32, sizeof( char ) );
|
|
strcpy( pjgfilename, ( in_type == 0 ) ? (char*) in_src : "PJG in memory" );
|
|
strcpy( jpgfilename, ( out_type == 0 ) ? (char*) out_dest : "JPG in memory" );
|
|
}
|
|
else {
|
|
// file is neither
|
|
filetype = F_UNK;
|
|
sprintf( errormessage, "filetype of input stream is unknown" );
|
|
errorlevel = 2;
|
|
return;
|
|
}
|
|
|
|
// store types of in-/output
|
|
lib_in_type = in_type;
|
|
lib_out_type = out_type;
|
|
}
|
|
#endif
|
|
|
|
|
|
/* -----------------------------------------------
|
|
DLL export version information
|
|
----------------------------------------------- */
|
|
|
|
#if defined(BUILD_LIB)
|
|
EXPORT const char* pjglib_version_info( void )
|
|
{
|
|
static char v_info[ 256 ];
|
|
|
|
// copy version info to string
|
|
sprintf( v_info, "--> %s library v%i.%i%s (%s) by %s <--",
|
|
apptitle, appversion / 10, appversion % 10, subversion, versiondate, author );
|
|
|
|
return (const char*) v_info;
|
|
}
|
|
#endif
|
|
|
|
|
|
/* -----------------------------------------------
|
|
DLL export version information
|
|
----------------------------------------------- */
|
|
|
|
#if defined(BUILD_LIB)
|
|
EXPORT const char* pjglib_short_name( void )
|
|
{
|
|
static char v_name[ 256 ];
|
|
|
|
// copy version info to string
|
|
sprintf( v_name, "%s v%i.%i%s",
|
|
apptitle, appversion / 10, appversion % 10, subversion );
|
|
|
|
return (const char*) v_name;
|
|
}
|
|
#endif
|
|
|
|
/* ----------------------- End of libary only functions -------------------------- */
|
|
|
|
/* ----------------------- Begin of main interface functions -------------------------- */
|
|
|
|
|
|
/* -----------------------------------------------
|
|
reads in commandline arguments
|
|
----------------------------------------------- */
|
|
|
|
#if !defined(BUILD_LIB)
|
|
INTERN void initialize_options( int argc, char** argv )
|
|
{
|
|
int tmp_val;
|
|
char** tmp_flp;
|
|
int i;
|
|
|
|
|
|
// get memory for filelist & preset with NULL
|
|
filelist = (char**) calloc( argc, sizeof( char* ) );
|
|
for ( i = 0; i < argc; i++ )
|
|
filelist[ i ] = NULL;
|
|
|
|
// preset temporary filelist pointer
|
|
tmp_flp = filelist;
|
|
|
|
|
|
// read in arguments
|
|
while ( --argc > 0 ) {
|
|
argv++;
|
|
// switches begin with '-'
|
|
if ( strcmp((*argv), "-p" ) == 0 ) {
|
|
err_tol = 2;
|
|
}
|
|
else if ( strcmp((*argv), "-d" ) == 0 ) {
|
|
disc_meta = true;
|
|
}
|
|
else if ( strcmp((*argv), "-ver" ) == 0 ) {
|
|
verify_lv = ( verify_lv < 1 ) ? 1 : verify_lv;
|
|
}
|
|
else if ( sscanf( (*argv), "-v%i", &tmp_val ) == 1 ){
|
|
verbosity = tmp_val;
|
|
verbosity = ( verbosity < 0 ) ? 0 : verbosity;
|
|
verbosity = ( verbosity > 2 ) ? 2 : verbosity;
|
|
}
|
|
else if ( strcmp((*argv), "-vp" ) == 0 ) {
|
|
verbosity = -1;
|
|
}
|
|
else if ( strcmp((*argv), "-np" ) == 0 ) {
|
|
wait_exit = false;
|
|
}
|
|
else if ( strcmp((*argv), "-o" ) == 0 ) {
|
|
overwrite = true;
|
|
}
|
|
#if defined(DEV_BUILD)
|
|
else if ( strcmp((*argv), "-dev") == 0 ) {
|
|
developer = true;
|
|
}
|
|
else if ( strcmp((*argv), "-test") == 0 ) {
|
|
verify_lv = 2;
|
|
}
|
|
else if ( sscanf( (*argv), "-t%i,%i", &i, &tmp_val ) == 2 ) {
|
|
i = ( i < 0 ) ? 0 : i;
|
|
i = ( i > 3 ) ? 3 : i;
|
|
tmp_val = ( tmp_val < 0 ) ? 0 : tmp_val;
|
|
tmp_val = ( tmp_val > 10 ) ? 10 : tmp_val;
|
|
nois_trs[ i ] = tmp_val;
|
|
auto_set = false;
|
|
}
|
|
else if ( sscanf( (*argv), "-s%i,%i", &i, &tmp_val ) == 2 ) {
|
|
i = ( i < 0 ) ? 0 : i;
|
|
i = ( i > 3 ) ? 3 : i;
|
|
tmp_val = ( tmp_val < 1 ) ? 1 : tmp_val;
|
|
tmp_val = ( tmp_val > 49 ) ? 49 : tmp_val;
|
|
segm_cnt[ i ] = tmp_val;
|
|
auto_set = false;
|
|
}
|
|
else if ( sscanf( (*argv), "-t%i", &tmp_val ) == 1 ) {
|
|
tmp_val = ( tmp_val < 0 ) ? 0 : tmp_val;
|
|
tmp_val = ( tmp_val > 10 ) ? 10 : tmp_val;
|
|
nois_trs[0] = tmp_val;
|
|
nois_trs[1] = tmp_val;
|
|
nois_trs[2] = tmp_val;
|
|
nois_trs[3] = tmp_val;
|
|
auto_set = false;
|
|
}
|
|
else if ( sscanf( (*argv), "-s%i", &tmp_val ) == 1 ) {
|
|
tmp_val = ( tmp_val < 1 ) ? 1 : tmp_val;
|
|
tmp_val = ( tmp_val > 64 ) ? 64 : tmp_val;
|
|
segm_cnt[0] = tmp_val;
|
|
segm_cnt[1] = tmp_val;
|
|
segm_cnt[2] = tmp_val;
|
|
segm_cnt[3] = tmp_val;
|
|
auto_set = false;
|
|
}
|
|
else if ( sscanf( (*argv), "-coll%i", &tmp_val ) == 1 ) {
|
|
tmp_val = ( tmp_val < 0 ) ? 0 : tmp_val;
|
|
tmp_val = ( tmp_val > 5 ) ? 5 : tmp_val;
|
|
collmode = tmp_val;
|
|
action = A_COLL_DUMP;
|
|
}
|
|
else if ( sscanf( (*argv), "-fcol%i", &tmp_val ) == 1 ) {
|
|
tmp_val = ( tmp_val < 0 ) ? 0 : tmp_val;
|
|
tmp_val = ( tmp_val > 5 ) ? 5 : tmp_val;
|
|
collmode = tmp_val;
|
|
action = A_FCOLL_DUMP;
|
|
}
|
|
else if ( strcmp((*argv), "-split") == 0 ) {
|
|
action = A_SPLIT_DUMP;
|
|
}
|
|
else if ( strcmp((*argv), "-zdst") == 0 ) {
|
|
action = A_ZDST_DUMP;
|
|
}
|
|
else if ( strcmp((*argv), "-info") == 0 ) {
|
|
action = A_TXT_INFO;
|
|
}
|
|
else if ( strcmp((*argv), "-dist") == 0 ) {
|
|
action = A_DIST_INFO;
|
|
}
|
|
else if ( strcmp((*argv), "-pgm") == 0 ) {
|
|
action = A_PGM_DUMP;
|
|
}
|
|
else if ( ( strcmp((*argv), "-comp") == 0) ) {
|
|
action = A_COMPRESS;
|
|
}
|
|
#endif
|
|
else if ( strcmp((*argv), "-") == 0 ) {
|
|
// switch standard message out stream
|
|
msgout = stderr;
|
|
// use "-" as placeholder for stdin
|
|
*(tmp_flp++) = (char*) "-";
|
|
}
|
|
else {
|
|
// if argument is not switch, it's a filename
|
|
*(tmp_flp++) = *argv;
|
|
}
|
|
}
|
|
|
|
// count number of files (or filenames) in filelist
|
|
for ( file_cnt = 0; filelist[ file_cnt ] != NULL; file_cnt++ );
|
|
|
|
// alloc arrays for error messages and types storage
|
|
err_list = (char**) calloc( file_cnt, sizeof( char* ) );
|
|
err_tp = (int*) calloc( file_cnt, sizeof( int ) );
|
|
|
|
// backup settings - needed to restore original setting later
|
|
if ( !auto_set ) {
|
|
orig_set[ 0 ] = nois_trs[ 0 ];
|
|
orig_set[ 1 ] = nois_trs[ 1 ];
|
|
orig_set[ 2 ] = nois_trs[ 2 ];
|
|
orig_set[ 3 ] = nois_trs[ 3 ];
|
|
orig_set[ 4 ] = segm_cnt[ 0 ];
|
|
orig_set[ 5 ] = segm_cnt[ 1 ];
|
|
orig_set[ 6 ] = segm_cnt[ 2 ];
|
|
orig_set[ 7 ] = segm_cnt[ 3 ];
|
|
}
|
|
else {
|
|
for ( i = 0; i < 8; i++ )
|
|
orig_set[ i ] = 0;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
|
|
/* -----------------------------------------------
|
|
UI for processing one file
|
|
----------------------------------------------- */
|
|
|
|
#if !defined(BUILD_LIB)
|
|
INTERN void process_ui( void )
|
|
{
|
|
clock_t begin, end;
|
|
const char* actionmsg = NULL;
|
|
const char* errtypemsg = NULL;
|
|
int total, bpms;
|
|
float cr;
|
|
|
|
|
|
errorfunction = NULL;
|
|
errorlevel = 0;
|
|
jpgfilesize = 0;
|
|
pjgfilesize = 0;
|
|
#if !defined(DEV_BUILD)
|
|
action = A_COMPRESS;
|
|
#endif
|
|
|
|
// compare file name, set pipe if needed
|
|
if ( ( strcmp( filelist[ file_no ], "-" ) == 0 ) && ( action == A_COMPRESS ) ) {
|
|
pipe_on = true;
|
|
filelist[ file_no ] = (char*) "STDIN";
|
|
}
|
|
else {
|
|
pipe_on = false;
|
|
}
|
|
|
|
if ( verbosity >= 0 ) { // standard UI
|
|
fprintf( msgout, "\nProcessing file %i of %i \"%s\" -> ",
|
|
file_no + 1, file_cnt, filelist[ file_no ] );
|
|
|
|
if ( verbosity > 1 )
|
|
fprintf( msgout, "\n----------------------------------------" );
|
|
|
|
// check input file and determine filetype
|
|
execute( check_file );
|
|
|
|
// get specific action message
|
|
if ( filetype == F_UNK ) actionmsg = "unknown filetype";
|
|
else switch ( action ) {
|
|
case A_COMPRESS: actionmsg = ( filetype == F_JPG ) ? "Compressing" : "Decompressing"; break;
|
|
case A_SPLIT_DUMP: actionmsg = "Splitting"; break;
|
|
case A_COLL_DUMP: actionmsg = "Extracting Colls"; break;
|
|
case A_FCOLL_DUMP: actionmsg = "Extracting FColls"; break;
|
|
case A_ZDST_DUMP: actionmsg = "Extracting ZDST lists"; break;
|
|
case A_TXT_INFO: actionmsg = "Extracting info"; break;
|
|
case A_DIST_INFO: actionmsg = "Extracting distributions"; break;
|
|
case A_PGM_DUMP: actionmsg = "Converting"; break;
|
|
}
|
|
|
|
if ( verbosity < 2 ) fprintf( msgout, "%s -> ", actionmsg );
|
|
}
|
|
else { // progress bar UI
|
|
// update progress message
|
|
fprintf( msgout, "Processing file %2i of %2i ", file_no + 1, file_cnt );
|
|
progress_bar( file_no, file_cnt );
|
|
fprintf( msgout, "\r" );
|
|
execute( check_file );
|
|
}
|
|
fflush( msgout );
|
|
|
|
|
|
// main function routine
|
|
begin = clock();
|
|
|
|
// streams are initiated, start processing file
|
|
process_file();
|
|
|
|
// close iostreams
|
|
if ( str_in != NULL ) delete( str_in ); str_in = NULL;
|
|
if ( str_out != NULL ) delete( str_out ); str_out = NULL;
|
|
if ( str_str != NULL ) delete( str_str ); str_str = NULL;
|
|
// delete if broken or if output not needed
|
|
if ( ( !pipe_on ) && ( ( errorlevel >= err_tol ) || ( action != A_COMPRESS ) ) ) {
|
|
if ( filetype == F_JPG ) {
|
|
if ( file_exists( pjgfilename ) ) remove( pjgfilename );
|
|
} else if ( filetype == F_PJG ) {
|
|
if ( file_exists( jpgfilename ) ) remove( jpgfilename );
|
|
}
|
|
}
|
|
|
|
end = clock();
|
|
|
|
// speed and compression ratio calculation
|
|
total = (int) ( (double) (( end - begin ) * 1000) / CLOCKS_PER_SEC );
|
|
bpms = ( total > 0 ) ? ( jpgfilesize / total ) : jpgfilesize;
|
|
cr = ( jpgfilesize > 0 ) ? ( 100.0 * pjgfilesize / jpgfilesize ) : 0;
|
|
|
|
|
|
if ( verbosity >= 0 ) { // standard UI
|
|
if ( verbosity > 1 )
|
|
fprintf( msgout, "\n----------------------------------------" );
|
|
|
|
// display success/failure message
|
|
switch ( verbosity ) {
|
|
case 0:
|
|
if ( errorlevel < err_tol ) {
|
|
if ( action == A_COMPRESS ) fprintf( msgout, "%.2f%%", cr );
|
|
else fprintf( msgout, "DONE" );
|
|
}
|
|
else fprintf( msgout, "ERROR" );
|
|
if ( errorlevel > 0 ) fprintf( msgout, "\n" );
|
|
break;
|
|
|
|
case 1:
|
|
fprintf( msgout, "%s\n", ( errorlevel < err_tol ) ? "DONE" : "ERROR" );
|
|
break;
|
|
|
|
case 2:
|
|
if ( errorlevel < err_tol ) fprintf( msgout, "\n-> %s OK\n", actionmsg );
|
|
else fprintf( msgout, "\n-> %s ERROR\n", actionmsg );
|
|
break;
|
|
}
|
|
|
|
// set type of error message
|
|
switch ( errorlevel ) {
|
|
case 0: errtypemsg = "none"; break;
|
|
case 1: errtypemsg = ( err_tol > 1 ) ? "warning (ignored)" : "warning (skipped file)"; break;
|
|
case 2: errtypemsg = "fatal error"; break;
|
|
}
|
|
|
|
// error/ warning message
|
|
if ( errorlevel > 0 ) {
|
|
fprintf( msgout, " %s -> %s:\n", get_status( errorfunction ), errtypemsg );
|
|
fprintf( msgout, " %s\n", errormessage );
|
|
}
|
|
if ( (verbosity > 0) && (errorlevel < err_tol) && (action == A_COMPRESS) ) {
|
|
if ( total >= 0 ) {
|
|
fprintf( msgout, " time taken : %7i msec\n", total );
|
|
fprintf( msgout, " byte per ms : %7i byte\n", bpms );
|
|
}
|
|
else {
|
|
fprintf( msgout, " time taken : %7s msec\n", "N/A" );
|
|
fprintf( msgout, " byte per ms : %7s byte\n", "N/A" );
|
|
}
|
|
fprintf( msgout, " comp. ratio : %7.2f %%\n", cr );
|
|
}
|
|
if ( ( verbosity > 1 ) && ( action == A_COMPRESS ) )
|
|
fprintf( msgout, "\n" );
|
|
}
|
|
else { // progress bar UI
|
|
// if this is the last file, update progress bar one last time
|
|
if ( file_no + 1 == file_cnt ) {
|
|
// update progress message
|
|
fprintf( msgout, "Processed %2i of %2i files ", file_no + 1, file_cnt );
|
|
progress_bar( 1, 1 );
|
|
fprintf( msgout, "\r" );
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
|
|
/* -----------------------------------------------
|
|
gets statusmessage for function
|
|
----------------------------------------------- */
|
|
|
|
#if !defined(BUILD_LIB)
|
|
INTERN inline const char* get_status( bool (*function)() )
|
|
{
|
|
if ( function == NULL ) {
|
|
return "unknown action";
|
|
} else if ( function == *check_file ) {
|
|
return "Determining filetype";
|
|
} else if ( function == *read_jpeg ) {
|
|
return "Reading header & image data";
|
|
} else if ( function == *merge_jpeg ) {
|
|
return "Merging header & image data";
|
|
} else if ( function == *decode_jpeg ) {
|
|
return "Decompressing JPEG image data";
|
|
} else if ( function == *recode_jpeg ) {
|
|
return "Recompressing JPEG image data";
|
|
} else if ( function == *adapt_icos ) {
|
|
return "Adapting DCT precalc. tables";
|
|
} else if ( function == *predict_dc ) {
|
|
return "Applying prediction to DC";
|
|
} else if ( function == *unpredict_dc ) {
|
|
return "Removing prediction from DC";
|
|
} else if ( function == *check_value_range ) {
|
|
return "Checking values range";
|
|
} else if ( function == *calc_zdst_lists ) {
|
|
return "Calculating zero dist lists";
|
|
} else if ( function == *pack_pjg ) {
|
|
return "Compressing data to PJG";
|
|
} else if ( function == *unpack_pjg ) {
|
|
return "Uncompressing data from PJG";
|
|
} else if ( function == *swap_streams ) {
|
|
return "Swapping input/output streams";
|
|
} else if ( function == *compare_output ) {
|
|
return "Verifying output stream";
|
|
} else if ( function == *reset_buffers ) {
|
|
return "Resetting program";
|
|
}
|
|
#if defined(DEV_BUILD)
|
|
else if ( function == *dump_hdr ) {
|
|
return "Writing header data to file";
|
|
} else if ( function == *dump_huf ) {
|
|
return "Writing huffman data to file";
|
|
} else if ( function == *dump_coll ) {
|
|
return "Writing collections to files";
|
|
} else if ( function == *dump_zdst ) {
|
|
return "Writing zdist lists to files";
|
|
} else if ( function == *dump_errfile ) {
|
|
return "Writing error info to file";
|
|
} else if ( function == *dump_info ) {
|
|
return "Writing info to files";
|
|
} else if ( function == *dump_dist ) {
|
|
return "Writing distributions to files";
|
|
} else if ( function == *dump_pgm ) {
|
|
return "Writing converted image to pgm";
|
|
}
|
|
#endif
|
|
else {
|
|
return "Function description missing!";
|
|
}
|
|
}
|
|
#endif
|
|
|
|
|
|
/* -----------------------------------------------
|
|
shows help in case of wrong input
|
|
----------------------------------------------- */
|
|
|
|
#if !defined(BUILD_LIB)
|
|
INTERN void show_help( void )
|
|
{
|
|
fprintf( msgout, "\n" );
|
|
fprintf( msgout, "Website: %s\n", website );
|
|
fprintf( msgout, "Email : %s\n", email );
|
|
fprintf( msgout, "\n" );
|
|
fprintf( msgout, "Usage: %s [switches] [filename(s)]", appname );
|
|
fprintf( msgout, "\n" );
|
|
fprintf( msgout, "\n" );
|
|
fprintf( msgout, " [-ver] verify files after processing\n" );
|
|
fprintf( msgout, " [-v?] set level of verbosity (max: 2) (def: 0)\n" );
|
|
fprintf( msgout, " [-np] no pause after processing files\n" );
|
|
fprintf( msgout, " [-o] overwrite existing files\n" );
|
|
fprintf( msgout, " [-p] proceed on warnings\n" );
|
|
fprintf( msgout, " [-d] discard meta-info\n" );
|
|
#if defined(DEV_BUILD)
|
|
if ( developer ) {
|
|
fprintf( msgout, "\n" );
|
|
fprintf( msgout, " [-s?] set global number of segments (1<=s<=49)\n" );
|
|
fprintf( msgout, " [-t?] set global noise threshold (0<=t<=10)\n" );
|
|
fprintf( msgout, "\n" );
|
|
fprintf( msgout, " [-s?,?] set number of segments for component\n" );
|
|
fprintf( msgout, " [-t?,?] set noise threshold for component\n" );
|
|
fprintf( msgout, "\n" );
|
|
fprintf( msgout, " [-test] test algorithms, alert if error\n" );
|
|
fprintf( msgout, " [-split] split jpeg (to header & image data)\n" );
|
|
fprintf( msgout, " [-coll?] write collections (0=std,1=dhf,2=squ,3=unc)\n" );
|
|
fprintf( msgout, " [-fcol?] write predicted collections (see above)\n" );
|
|
fprintf( msgout, " [-zdst] write zero distribution lists\n" );
|
|
fprintf( msgout, " [-info] write debug info to .nfo file\n" );
|
|
fprintf( msgout, " [-dist] write distribution data to file\n" );
|
|
fprintf( msgout, " [-pgm] convert and write to pgm files\n" );
|
|
}
|
|
#endif
|
|
fprintf( msgout, "\n" );
|
|
fprintf( msgout, "Examples: \"%s -v1 -o baboon.%s\"\n", appname, pjg_ext );
|
|
fprintf( msgout, " \"%s -p *.%s\"\n", appname, jpg_ext );
|
|
}
|
|
#endif
|
|
|
|
|
|
/* -----------------------------------------------
|
|
processes one file
|
|
----------------------------------------------- */
|
|
|
|
INTERN void process_file( void )
|
|
{
|
|
if ( filetype == F_JPG ) {
|
|
switch ( action ) {
|
|
case A_COMPRESS:
|
|
execute( read_jpeg );
|
|
execute( decode_jpeg );
|
|
execute( check_value_range );
|
|
execute( adapt_icos );
|
|
execute( predict_dc );
|
|
execute( calc_zdst_lists );
|
|
execute( pack_pjg );
|
|
#if !defined(BUILD_LIB)
|
|
if ( verify_lv > 0 ) { // verifcation
|
|
execute( reset_buffers );
|
|
execute( swap_streams );
|
|
execute( unpack_pjg );
|
|
execute( adapt_icos );
|
|
execute( unpredict_dc );
|
|
execute( recode_jpeg );
|
|
execute( merge_jpeg );
|
|
execute( compare_output );
|
|
}
|
|
#endif
|
|
break;
|
|
|
|
#if !defined(BUILD_LIB) && defined(DEV_BUILD)
|
|
case A_SPLIT_DUMP:
|
|
execute( read_jpeg );
|
|
execute( dump_hdr );
|
|
execute( dump_huf );
|
|
break;
|
|
|
|
case A_COLL_DUMP:
|
|
execute( read_jpeg );
|
|
execute( decode_jpeg );
|
|
execute( dump_coll );
|
|
break;
|
|
|
|
case A_FCOLL_DUMP:
|
|
execute( read_jpeg );
|
|
execute( decode_jpeg );
|
|
execute( check_value_range );
|
|
execute( adapt_icos );
|
|
execute( predict_dc );
|
|
execute( dump_coll );
|
|
break;
|
|
|
|
case A_ZDST_DUMP:
|
|
execute( read_jpeg );
|
|
execute( decode_jpeg );
|
|
execute( check_value_range );
|
|
execute( adapt_icos );
|
|
execute( predict_dc );
|
|
execute( calc_zdst_lists );
|
|
execute( dump_zdst );
|
|
break;
|
|
|
|
case A_TXT_INFO:
|
|
execute( read_jpeg );
|
|
execute( dump_info );
|
|
break;
|
|
|
|
case A_DIST_INFO:
|
|
execute( read_jpeg );
|
|
execute( decode_jpeg );
|
|
execute( check_value_range );
|
|
execute( adapt_icos );
|
|
execute( predict_dc );
|
|
execute( dump_dist );
|
|
break;
|
|
|
|
case A_PGM_DUMP:
|
|
execute( read_jpeg );
|
|
execute( decode_jpeg );
|
|
execute( adapt_icos );
|
|
execute( dump_pgm );
|
|
break;
|
|
#else
|
|
default:
|
|
break;
|
|
#endif
|
|
}
|
|
}
|
|
else if ( filetype == F_PJG ) {
|
|
switch ( action )
|
|
{
|
|
case A_COMPRESS:
|
|
execute( unpack_pjg );
|
|
execute( adapt_icos );
|
|
execute( unpredict_dc );
|
|
execute( recode_jpeg );
|
|
execute( merge_jpeg );
|
|
#if !defined(BUILD_LIB)
|
|
if ( verify_lv > 0 ) { // verify
|
|
execute( reset_buffers );
|
|
execute( swap_streams );
|
|
execute( read_jpeg );
|
|
execute( decode_jpeg );
|
|
execute( check_value_range );
|
|
execute( adapt_icos );
|
|
execute( predict_dc );
|
|
execute( calc_zdst_lists );
|
|
execute( pack_pjg );
|
|
execute( compare_output );
|
|
}
|
|
#endif
|
|
break;
|
|
|
|
#if !defined(BUILD_LIB) && defined(DEV_BUILD)
|
|
case A_SPLIT_DUMP:
|
|
execute( unpack_pjg );
|
|
execute( adapt_icos );
|
|
execute( unpredict_dc );
|
|
execute( recode_jpeg );
|
|
execute( dump_hdr );
|
|
execute( dump_huf );
|
|
break;
|
|
|
|
case A_COLL_DUMP:
|
|
execute( unpack_pjg );
|
|
execute( adapt_icos );
|
|
execute( unpredict_dc );
|
|
execute( dump_coll );
|
|
break;
|
|
|
|
case A_FCOLL_DUMP:
|
|
execute( unpack_pjg );
|
|
execute( dump_coll );
|
|
break;
|
|
|
|
case A_ZDST_DUMP:
|
|
execute( unpack_pjg );
|
|
execute( dump_zdst );
|
|
break;
|
|
|
|
case A_TXT_INFO:
|
|
execute( unpack_pjg );
|
|
execute( dump_info );
|
|
break;
|
|
|
|
case A_DIST_INFO:
|
|
execute( unpack_pjg );
|
|
execute( dump_dist );
|
|
break;
|
|
|
|
case A_PGM_DUMP:
|
|
execute( unpack_pjg );
|
|
execute( adapt_icos );
|
|
execute( unpredict_dc );
|
|
execute( dump_pgm );
|
|
break;
|
|
#else
|
|
default:
|
|
break;
|
|
#endif
|
|
}
|
|
}
|
|
#if !defined(BUILD_LIB) && defined(DEV_BUILD)
|
|
// write error file if verify lv > 1
|
|
if ( ( verify_lv > 1 ) && ( errorlevel >= err_tol ) )
|
|
dump_errfile();
|
|
#endif
|
|
// reset buffers
|
|
reset_buffers();
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
main-function execution routine
|
|
----------------------------------------------- */
|
|
|
|
INTERN void execute( bool (*function)() )
|
|
{
|
|
if ( errorlevel < err_tol ) {
|
|
#if !defined BUILD_LIB
|
|
clock_t begin, end;
|
|
bool success;
|
|
int total;
|
|
|
|
// write statusmessage
|
|
if ( verbosity == 2 ) {
|
|
fprintf( msgout, "\n%s ", get_status( function ) );
|
|
for ( int i = strlen( get_status( function ) ); i <= 30; i++ )
|
|
fprintf( msgout, " " );
|
|
}
|
|
|
|
// set starttime
|
|
begin = clock();
|
|
// call function
|
|
success = ( *function )();
|
|
// set endtime
|
|
end = clock();
|
|
|
|
if ( ( errorlevel > 0 ) && ( errorfunction == NULL ) )
|
|
errorfunction = function;
|
|
|
|
// write time or failure notice
|
|
if ( success ) {
|
|
total = (int) ( (double) (( end - begin ) * 1000) / CLOCKS_PER_SEC );
|
|
if ( verbosity == 2 ) fprintf( msgout, "%6ims", ( total >= 0 ) ? total : -1 );
|
|
}
|
|
else {
|
|
errorfunction = function;
|
|
if ( verbosity == 2 ) fprintf( msgout, "%8s", "ERROR" );
|
|
}
|
|
#else
|
|
// call function
|
|
( *function )();
|
|
|
|
// store errorfunction if needed
|
|
if ( ( errorlevel > 0 ) && ( errorfunction == NULL ) )
|
|
errorfunction = function;
|
|
#endif
|
|
}
|
|
}
|
|
|
|
/* ----------------------- End of main interface functions -------------------------- */
|
|
|
|
/* ----------------------- Begin of main functions -------------------------- */
|
|
|
|
|
|
/* -----------------------------------------------
|
|
check file and determine filetype
|
|
----------------------------------------------- */
|
|
|
|
#if !defined(BUILD_LIB)
|
|
INTERN bool check_file( void )
|
|
{
|
|
unsigned char fileid[ 2 ] = { 0, 0 };
|
|
const char* filename = filelist[ file_no ];
|
|
|
|
|
|
// open input stream, check for errors
|
|
str_in = new iostream( (void*) filename, ( !pipe_on ) ? 0 : 2, 0, 0 );
|
|
if ( str_in->chkerr() ) {
|
|
sprintf( errormessage, FRD_ERRMSG, filename );
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
|
|
// free memory from filenames if needed
|
|
if ( jpgfilename != NULL ) free( jpgfilename ); jpgfilename = NULL;
|
|
if ( pjgfilename != NULL ) free( pjgfilename ); pjgfilename = NULL;
|
|
|
|
// immediately return error if 2 bytes can't be read
|
|
if ( str_in->read( fileid, 1, 2 ) != 2 ) {
|
|
filetype = F_UNK;
|
|
sprintf( errormessage, "file doesn't contain enough data" );
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
|
|
// check file id, determine filetype
|
|
if ( ( fileid[0] == 0xFF ) && ( fileid[1] == 0xD8 ) ) {
|
|
// file is JPEG
|
|
filetype = F_JPG;
|
|
// create filenames
|
|
if ( !pipe_on ) {
|
|
jpgfilename = (char*) calloc( strlen( filename ) + 1, sizeof( char ) );
|
|
strcpy( jpgfilename, filename );
|
|
pjgfilename = ( overwrite ) ?
|
|
create_filename( filename, (char*) pjg_ext ) :
|
|
unique_filename( filename, (char*) pjg_ext );
|
|
}
|
|
else {
|
|
jpgfilename = create_filename( "STDIN", NULL );
|
|
pjgfilename = create_filename( "STDOUT", NULL );
|
|
}
|
|
// open output stream, check for errors
|
|
str_out = new iostream( (void*) pjgfilename, ( !pipe_on ) ? 0 : 2, 0, 1 );
|
|
if ( str_out->chkerr() ) {
|
|
sprintf( errormessage, FWR_ERRMSG, pjgfilename );
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
// JPEG specific settings - restore original settings
|
|
if ( orig_set[ 0 ] == 0 )
|
|
auto_set = true;
|
|
else {
|
|
nois_trs[ 0 ] = orig_set[ 0 ];
|
|
nois_trs[ 1 ] = orig_set[ 1 ];
|
|
nois_trs[ 2 ] = orig_set[ 2 ];
|
|
nois_trs[ 3 ] = orig_set[ 3 ];
|
|
segm_cnt[ 0 ] = orig_set[ 4 ];
|
|
segm_cnt[ 1 ] = orig_set[ 5 ];
|
|
segm_cnt[ 2 ] = orig_set[ 6 ];
|
|
segm_cnt[ 3 ] = orig_set[ 7 ];
|
|
auto_set = false;
|
|
}
|
|
}
|
|
else if ( ( fileid[0] == pjg_magic[0] ) && ( fileid[1] == pjg_magic[1] ) ) {
|
|
// file is PJG
|
|
filetype = F_PJG;
|
|
// create filenames
|
|
if ( !pipe_on ) {
|
|
pjgfilename = (char*) calloc( strlen( filename ) + 1, sizeof( char ) );
|
|
strcpy( pjgfilename, filename );
|
|
jpgfilename = ( overwrite ) ?
|
|
create_filename( filename, (char*) jpg_ext ) :
|
|
unique_filename( filename, (char*) jpg_ext );
|
|
}
|
|
else {
|
|
jpgfilename = create_filename( "STDOUT", NULL );
|
|
pjgfilename = create_filename( "STDIN", NULL );
|
|
}
|
|
// open output stream, check for errors
|
|
str_out = new iostream( (void*) jpgfilename, ( !pipe_on ) ? 0 : 2, 0, 1 );
|
|
if ( str_out->chkerr() ) {
|
|
sprintf( errormessage, FWR_ERRMSG, jpgfilename );
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
// PJG specific settings - auto unless specified otherwise
|
|
auto_set = true;
|
|
}
|
|
else {
|
|
// file is neither
|
|
filetype = F_UNK;
|
|
sprintf( errormessage, "filetype of file \"%s\" is unknown", filename );
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
|
|
|
|
return true;
|
|
}
|
|
#endif
|
|
|
|
|
|
/* -----------------------------------------------
|
|
swap streams / init verification
|
|
----------------------------------------------- */
|
|
|
|
#if !defined(BUILD_LIB)
|
|
INTERN bool swap_streams( void )
|
|
{
|
|
char dmp[ 2 ];
|
|
|
|
// store input stream
|
|
str_str = str_in;
|
|
str_str->rewind();
|
|
|
|
// replace input stream by output stream / switch mode for reading / read first bytes
|
|
str_in = str_out;
|
|
str_in->switch_mode();
|
|
str_in->read( dmp, 1, 2 );
|
|
|
|
// open new stream for output / check for errors
|
|
str_out = new iostream( NULL, 1, 0, 1 );
|
|
if ( str_out->chkerr() ) {
|
|
sprintf( errormessage, "error opening comparison stream" );
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
|
|
|
|
return true;
|
|
}
|
|
#endif
|
|
|
|
|
|
/* -----------------------------------------------
|
|
comparison between input & output
|
|
----------------------------------------------- */
|
|
|
|
#if !defined(BUILD_LIB)
|
|
INTERN bool compare_output( void )
|
|
{
|
|
unsigned char* buff_ori;
|
|
unsigned char* buff_cmp;
|
|
int bsize = 1024;
|
|
int dsize;
|
|
int i, b;
|
|
|
|
|
|
// init buffer arrays
|
|
buff_ori = ( unsigned char* ) calloc( bsize, sizeof( char ) );
|
|
buff_cmp = ( unsigned char* ) calloc( bsize, sizeof( char ) );
|
|
if ( ( buff_ori == NULL ) || ( buff_cmp == NULL ) ) {
|
|
sprintf( errormessage, MEM_ERRMSG );
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
|
|
// switch output stream mode / check for stream errors
|
|
str_out->switch_mode();
|
|
while ( true ) {
|
|
if ( str_out->chkerr() )
|
|
sprintf( errormessage, "error in comparison stream" );
|
|
else if ( str_in->chkerr() )
|
|
sprintf( errormessage, "error in output stream" );
|
|
else if ( str_str->chkerr() )
|
|
sprintf( errormessage, "error in input stream" );
|
|
else break;
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
|
|
// compare sizes
|
|
dsize = str_str->getsize();
|
|
if ( str_out->getsize() != dsize ) {
|
|
sprintf( errormessage, "file sizes do not match" );
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
|
|
// compare files byte by byte
|
|
for ( i = 0; i < dsize; i++ ) {
|
|
b = i % bsize;
|
|
if ( b == 0 ) {
|
|
str_str->read( buff_ori, sizeof( char ), bsize );
|
|
str_out->read( buff_cmp, sizeof( char ), bsize );
|
|
}
|
|
if ( buff_ori[ b ] != buff_cmp[ b ] ) {
|
|
sprintf( errormessage, "difference found at 0x%X", i );
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
}
|
|
|
|
// free buffers
|
|
free( buff_ori );
|
|
free( buff_cmp );
|
|
|
|
|
|
return true;
|
|
}
|
|
#endif
|
|
|
|
|
|
/* -----------------------------------------------
|
|
set each variable to its initial value
|
|
----------------------------------------------- */
|
|
|
|
INTERN bool reset_buffers( void )
|
|
{
|
|
int cmp, bpos;
|
|
int i;
|
|
|
|
|
|
// -- free buffers --
|
|
|
|
// free buffers & set pointers NULL
|
|
if ( hdrdata != NULL ) free ( hdrdata );
|
|
if ( huffdata != NULL ) free ( huffdata );
|
|
if ( grbgdata != NULL ) free ( grbgdata );
|
|
if ( rst_err != NULL ) free ( rst_err );
|
|
if ( rstp != NULL ) free ( rstp );
|
|
if ( scnp != NULL ) free ( scnp );
|
|
hdrdata = NULL;
|
|
huffdata = NULL;
|
|
grbgdata = NULL;
|
|
rst_err = NULL;
|
|
rstp = NULL;
|
|
scnp = NULL;
|
|
|
|
// free image arrays
|
|
for ( cmp = 0; cmp < 4; cmp++ ) {
|
|
if ( zdstdata[ cmp ] != NULL ) free( zdstdata[cmp] );
|
|
if ( eobxhigh[ cmp ] != NULL ) free( eobxhigh[cmp] );
|
|
if ( eobyhigh[ cmp ] != NULL ) free( eobyhigh[cmp] );
|
|
if ( zdstxlow[ cmp ] != NULL ) free( zdstxlow[cmp] );
|
|
if ( zdstylow[ cmp ] != NULL ) free( zdstylow[cmp] );
|
|
zdstdata[ cmp ] = NULL;
|
|
eobxhigh[ cmp ] = NULL;
|
|
eobyhigh[ cmp ] = NULL;
|
|
zdstxlow[ cmp ] = NULL;
|
|
zdstylow[ cmp ] = NULL;
|
|
freqscan[ cmp ] = (unsigned char*) stdscan;
|
|
|
|
for ( bpos = 0; bpos < 64; bpos++ ) {
|
|
if ( colldata[ cmp ][ bpos ] != NULL ) free( colldata[cmp][bpos] );
|
|
colldata[ cmp ][ bpos ] = NULL;
|
|
}
|
|
}
|
|
|
|
|
|
// -- set variables --
|
|
|
|
// preset componentinfo
|
|
for ( cmp = 0; cmp < 4; cmp++ ) {
|
|
cmpnfo[ cmp ].sfv = -1;
|
|
cmpnfo[ cmp ].sfh = -1;
|
|
cmpnfo[ cmp ].mbs = -1;
|
|
cmpnfo[ cmp ].bcv = -1;
|
|
cmpnfo[ cmp ].bch = -1;
|
|
cmpnfo[ cmp ].bc = -1;
|
|
cmpnfo[ cmp ].ncv = -1;
|
|
cmpnfo[ cmp ].nch = -1;
|
|
cmpnfo[ cmp ].nc = -1;
|
|
cmpnfo[ cmp ].sid = -1;
|
|
cmpnfo[ cmp ].jid = -1;
|
|
cmpnfo[ cmp ].qtable = NULL;
|
|
cmpnfo[ cmp ].huffdc = -1;
|
|
cmpnfo[ cmp ].huffac = -1;
|
|
}
|
|
|
|
// preset imgwidth / imgheight / component count
|
|
imgwidth = 0;
|
|
imgheight = 0;
|
|
cmpc = 0;
|
|
|
|
// preset mcu info variables / restart interval
|
|
sfhm = 0;
|
|
sfvm = 0;
|
|
mcuc = 0;
|
|
mcuh = 0;
|
|
mcuv = 0;
|
|
rsti = 0;
|
|
|
|
// reset quantization / huffman tables
|
|
for ( i = 0; i < 4; i++ ) {
|
|
htset[ 0 ][ i ] = 0;
|
|
htset[ 1 ][ i ] = 0;
|
|
for ( bpos = 0; bpos < 64; bpos++ )
|
|
qtables[ i ][ bpos ] = 0;
|
|
}
|
|
|
|
// preset jpegtype
|
|
jpegtype = 0;
|
|
|
|
// reset padbit
|
|
padbit = -1;
|
|
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
Read in header & image data
|
|
----------------------------------------------- */
|
|
|
|
INTERN bool read_jpeg( void )
|
|
{
|
|
unsigned char* segment = NULL; // storage for current segment
|
|
unsigned int ssize = 1024; // current size of segment array
|
|
unsigned char type = 0x00; // type of current marker segment
|
|
unsigned int len = 0; // length of current marker segment
|
|
unsigned int crst = 0; // current rst marker counter
|
|
unsigned int cpos = 0; // rst marker counter
|
|
unsigned char tmp;
|
|
|
|
abytewriter* huffw;
|
|
abytewriter* hdrw;
|
|
abytewriter* grbgw;
|
|
|
|
|
|
// preset count of scans
|
|
scnc = 0;
|
|
|
|
// start headerwriter
|
|
hdrw = new abytewriter( 4096 );
|
|
hdrs = 0; // size of header data, start with 0
|
|
|
|
// start huffman writer
|
|
huffw = new abytewriter( 0 );
|
|
hufs = 0; // size of image data, start with 0
|
|
|
|
// alloc memory for segment data first
|
|
segment = ( unsigned char* ) calloc( ssize, sizeof( char ) );
|
|
if ( segment == NULL ) {
|
|
sprintf( errormessage, MEM_ERRMSG );
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
|
|
// JPEG reader loop
|
|
while ( true ) {
|
|
if ( type == 0xDA ) { // if last marker was sos
|
|
// switch to huffman data reading mode
|
|
cpos = 0;
|
|
crst = 0;
|
|
while ( true ) {
|
|
// read byte from imagedata
|
|
if ( str_in->read( &tmp, 1, 1 ) == 0 )
|
|
break;
|
|
|
|
// non-0xFF loop
|
|
if ( tmp != 0xFF ) {
|
|
crst = 0;
|
|
while ( tmp != 0xFF ) {
|
|
huffw->write( tmp );
|
|
if ( str_in->read( &tmp, 1, 1 ) == 0 )
|
|
break;
|
|
}
|
|
}
|
|
|
|
// treatment of 0xFF
|
|
if ( tmp == 0xFF ) {
|
|
if ( str_in->read( &tmp, 1, 1 ) == 0 )
|
|
break; // read next byte & check
|
|
if ( tmp == 0x00 ) {
|
|
crst = 0;
|
|
// no zeroes needed -> ignore 0x00. write 0xFF
|
|
huffw->write( 0xFF );
|
|
}
|
|
else if ( tmp == 0xD0 + ( cpos % 8 ) ) { // restart marker
|
|
// increment rst counters
|
|
cpos++;
|
|
crst++;
|
|
}
|
|
else { // in all other cases leave it to the header parser routines
|
|
// store number of wrongly set rst markers
|
|
if ( crst > 0 ) {
|
|
if ( rst_err == NULL ) {
|
|
rst_err = (unsigned char*) calloc( scnc + 1, sizeof( char ) );
|
|
if ( rst_err == NULL ) {
|
|
sprintf( errormessage, MEM_ERRMSG );
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
if ( rst_err != NULL ) {
|
|
// realloc and set only if needed
|
|
rst_err = ( unsigned char* ) realloc( rst_err, ( scnc + 1 ) * sizeof( char ) );
|
|
if ( rst_err == NULL ) {
|
|
sprintf( errormessage, MEM_ERRMSG );
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
if ( crst > 255 ) {
|
|
sprintf( errormessage, "Severe false use of RST markers (%i)", crst );
|
|
errorlevel = 1;
|
|
crst = 255;
|
|
}
|
|
rst_err[ scnc ] = crst;
|
|
}
|
|
// end of current scan
|
|
scnc++;
|
|
// on with the header parser routines
|
|
segment[ 0 ] = 0xFF;
|
|
segment[ 1 ] = tmp;
|
|
break;
|
|
}
|
|
}
|
|
else {
|
|
// otherwise this means end-of-file, so break out
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
// read in next marker
|
|
if ( str_in->read( segment, 1, 2 ) != 2 ) break;
|
|
if ( segment[ 0 ] != 0xFF ) {
|
|
// ugly fix for incorrect marker segment sizes
|
|
sprintf( errormessage, "size mismatch in marker segment FF %2X", type );
|
|
errorlevel = 2;
|
|
if ( type == 0xFE ) { // if last marker was COM try again
|
|
if ( str_in->read( segment, 1, 2 ) != 2 ) break;
|
|
if ( segment[ 0 ] == 0xFF ) errorlevel = 1;
|
|
}
|
|
if ( errorlevel == 2 ) {
|
|
delete ( hdrw );
|
|
delete ( huffw );
|
|
free ( segment );
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
// read segment type
|
|
type = segment[ 1 ];
|
|
|
|
// if EOI is encountered make a quick exit
|
|
if ( type == 0xD9 ) {
|
|
// get pointer for header data & size
|
|
hdrdata = hdrw->getptr();
|
|
hdrs = hdrw->getpos();
|
|
// get pointer for huffman data & size
|
|
huffdata = huffw->getptr();
|
|
hufs = huffw->getpos();
|
|
// everything is done here now
|
|
break;
|
|
}
|
|
|
|
// read in next segments' length and check it
|
|
if ( str_in->read( segment + 2, 1, 2 ) != 2 ) break;
|
|
len = 2 + B_SHORT( segment[ 2 ], segment[ 3 ] );
|
|
if ( len < 4 ) break;
|
|
|
|
// realloc segment data if needed
|
|
if ( ssize < len ) {
|
|
segment = ( unsigned char* ) realloc( segment, len );
|
|
if ( segment == NULL ) {
|
|
sprintf( errormessage, MEM_ERRMSG );
|
|
errorlevel = 2;
|
|
delete ( hdrw );
|
|
delete ( huffw );
|
|
return false;
|
|
}
|
|
ssize = len;
|
|
}
|
|
|
|
// read rest of segment, store back in header writer
|
|
if ( str_in->read( ( segment + 4 ), 1, ( len - 4 ) ) !=
|
|
( unsigned short ) ( len - 4 ) ) break;
|
|
hdrw->write_n( segment, len );
|
|
}
|
|
// JPEG reader loop end
|
|
|
|
// free writers
|
|
delete ( hdrw );
|
|
delete ( huffw );
|
|
|
|
// check if everything went OK
|
|
if ( ( hdrs == 0 ) || ( hufs == 0 ) ) {
|
|
sprintf( errormessage, "unexpected end of data encountered" );
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
|
|
// store garbage after EOI if needed
|
|
grbs = str_in->read( &tmp, 1, 1 );
|
|
if ( grbs > 0 ) {
|
|
grbgw = new abytewriter( 1024 );
|
|
grbgw->write( tmp );
|
|
while( true ) {
|
|
len = str_in->read( segment, 1, ssize );
|
|
if ( len == 0 ) break;
|
|
grbgw->write_n( segment, len );
|
|
}
|
|
grbgdata = grbgw->getptr();
|
|
grbs = grbgw->getpos();
|
|
delete ( grbgw );
|
|
}
|
|
|
|
// free segment
|
|
free( segment );
|
|
|
|
// get filesize
|
|
jpgfilesize = str_in->getsize();
|
|
|
|
// parse header for image info
|
|
if ( !jpg_setup_imginfo() ) {
|
|
return false;
|
|
}
|
|
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
Merges header & image data to jpeg
|
|
----------------------------------------------- */
|
|
|
|
INTERN bool merge_jpeg( void )
|
|
{
|
|
unsigned char SOI[ 2 ] = { 0xFF, 0xD8 }; // SOI segment
|
|
unsigned char EOI[ 2 ] = { 0xFF, 0xD9 }; // EOI segment
|
|
unsigned char mrk = 0xFF; // marker start
|
|
unsigned char stv = 0x00; // 0xFF stuff value
|
|
unsigned char rst = 0xD0; // restart marker
|
|
|
|
unsigned char type = 0x00; // type of current marker segment
|
|
unsigned int len = 0; // length of current marker segment
|
|
unsigned int hpos = 0; // current position in header
|
|
unsigned int ipos = 0; // current position in imagedata
|
|
unsigned int rpos = 0; // current restart marker position
|
|
unsigned int cpos = 0; // in scan corrected rst marker position
|
|
unsigned int scan = 1; // number of current scan
|
|
unsigned int tmp; // temporary storage variable
|
|
|
|
|
|
// write SOI
|
|
str_out->write( SOI, 1, 2 );
|
|
|
|
// JPEG writing loop
|
|
while ( true )
|
|
{
|
|
// store current header position
|
|
tmp = hpos;
|
|
|
|
// seek till start-of-scan
|
|
for ( type = 0x00; type != 0xDA; ) {
|
|
if ( ( int ) hpos >= hdrs ) break;
|
|
type = hdrdata[ hpos + 1 ];
|
|
len = 2 + B_SHORT( hdrdata[ hpos + 2 ], hdrdata[ hpos + 3 ] );
|
|
hpos += len;
|
|
}
|
|
|
|
// write header data to file
|
|
str_out->write( hdrdata + tmp, 1, ( hpos - tmp ) );
|
|
|
|
// get out if last marker segment type was not SOS
|
|
if ( type != 0xDA ) break;
|
|
|
|
|
|
// (re)set corrected rst pos
|
|
cpos = 0;
|
|
|
|
// write & expand huffman coded image data
|
|
for ( ipos = scnp[ scan - 1 ]; ipos < scnp[ scan ]; ipos++ ) {
|
|
// write current byte
|
|
str_out->write( huffdata + ipos, 1, 1 );
|
|
// check current byte, stuff if needed
|
|
if ( huffdata[ ipos ] == 0xFF )
|
|
str_out->write( &stv, 1, 1 );
|
|
// insert restart markers if needed
|
|
if ( rstp != NULL ) {
|
|
if ( ipos == rstp[ rpos ] ) {
|
|
rst = 0xD0 + ( cpos % 8 );
|
|
str_out->write( &mrk, 1, 1 );
|
|
str_out->write( &rst, 1, 1 );
|
|
rpos++; cpos++;
|
|
}
|
|
}
|
|
}
|
|
// insert false rst markers at end if needed
|
|
if ( rst_err != NULL ) {
|
|
while ( rst_err[ scan - 1 ] > 0 ) {
|
|
rst = 0xD0 + ( cpos % 8 );
|
|
str_out->write( &mrk, 1, 1 );
|
|
str_out->write( &rst, 1, 1 );
|
|
cpos++; rst_err[ scan - 1 ]--;
|
|
}
|
|
}
|
|
|
|
// proceed with next scan
|
|
scan++;
|
|
}
|
|
|
|
// write EOI
|
|
str_out->write( EOI, 1, 2 );
|
|
|
|
// write garbage if needed
|
|
if ( grbs > 0 )
|
|
str_out->write( grbgdata, 1, grbs );
|
|
|
|
// errormessage if write error
|
|
if ( str_out->chkerr() ) {
|
|
sprintf( errormessage, "write error, possibly drive is full" );
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
|
|
// get filesize
|
|
jpgfilesize = str_out->getsize();
|
|
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
JPEG decoding routine
|
|
----------------------------------------------- */
|
|
|
|
INTERN bool decode_jpeg( void )
|
|
{
|
|
abitreader* huffr; // bitwise reader for image data
|
|
|
|
unsigned char type = 0x00; // type of current marker segment
|
|
unsigned int len = 0; // length of current marker segment
|
|
unsigned int hpos = 0; // current position in header
|
|
|
|
int lastdc[ 4 ]; // last dc for each component
|
|
short block[ 64 ]; // store block for coeffs
|
|
int peobrun; // previous eobrun
|
|
int eobrun; // run of eobs
|
|
int rstw; // restart wait counter
|
|
|
|
int cmp, bpos, dpos;
|
|
int mcu, sub, csc;
|
|
int eob, sta;
|
|
|
|
|
|
// open huffman coded image data for input in abitreader
|
|
huffr = new abitreader( huffdata, hufs );
|
|
|
|
// preset count of scans
|
|
scnc = 0;
|
|
|
|
// JPEG decompression loop
|
|
while ( true )
|
|
{
|
|
// seek till start-of-scan, parse only DHT, DRI and SOS
|
|
for ( type = 0x00; type != 0xDA; ) {
|
|
if ( ( int ) hpos >= hdrs ) break;
|
|
type = hdrdata[ hpos + 1 ];
|
|
len = 2 + B_SHORT( hdrdata[ hpos + 2 ], hdrdata[ hpos + 3 ] );
|
|
if ( ( type == 0xC4 ) || ( type == 0xDA ) || ( type == 0xDD ) ) {
|
|
if ( !jpg_parse_jfif( type, len, &( hdrdata[ hpos ] ) ) ) {
|
|
return false;
|
|
}
|
|
}
|
|
hpos += len;
|
|
}
|
|
|
|
// get out if last marker segment type was not SOS
|
|
if ( type != 0xDA ) break;
|
|
|
|
// check if huffman tables are available
|
|
for ( csc = 0; csc < cs_cmpc; csc++ ) {
|
|
cmp = cs_cmp[ csc ];
|
|
if ( ( ( cs_sal == 0 ) && ( htset[ 0 ][ cmpnfo[cmp].huffdc ] == 0 ) ) ||
|
|
( ( cs_sah > 0 ) && ( htset[ 1 ][ cmpnfo[cmp].huffac ] == 0 ) ) ) {
|
|
sprintf( errormessage, "huffman table missing in scan%i", scnc );
|
|
delete huffr;
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
}
|
|
|
|
|
|
// intial variables set for decoding
|
|
cmp = cs_cmp[ 0 ];
|
|
csc = 0;
|
|
mcu = 0;
|
|
sub = 0;
|
|
dpos = 0;
|
|
|
|
// JPEG imagedata decoding routines
|
|
while ( true )
|
|
{
|
|
// (re)set last DCs for diff coding
|
|
lastdc[ 0 ] = 0;
|
|
lastdc[ 1 ] = 0;
|
|
lastdc[ 2 ] = 0;
|
|
lastdc[ 3 ] = 0;
|
|
|
|
// (re)set status
|
|
eob = 0;
|
|
sta = 0;
|
|
|
|
// (re)set eobrun
|
|
eobrun = 0;
|
|
peobrun = 0;
|
|
|
|
// (re)set rst wait counter
|
|
rstw = rsti;
|
|
|
|
// decoding for interleaved data
|
|
if ( cs_cmpc > 1 )
|
|
{
|
|
if ( jpegtype == 1 ) {
|
|
// ---> sequential interleaved decoding <---
|
|
while ( sta == 0 ) {
|
|
// decode block
|
|
eob = jpg_decode_block_seq( huffr,
|
|
&(htrees[ 0 ][ cmpnfo[cmp].huffdc ]),
|
|
&(htrees[ 1 ][ cmpnfo[cmp].huffdc ]),
|
|
block );
|
|
|
|
// fix dc
|
|
block[ 0 ] += lastdc[ cmp ];
|
|
lastdc[ cmp ] = block[ 0 ];
|
|
|
|
// copy to colldata
|
|
for ( bpos = 0; bpos < eob; bpos++ )
|
|
colldata[ cmp ][ bpos ][ dpos ] = block[ bpos ];
|
|
|
|
// check for errors, proceed if no error encountered
|
|
if ( eob < 0 ) sta = -1;
|
|
else sta = jpg_next_mcupos( &mcu, &cmp, &csc, &sub, &dpos, &rstw );
|
|
}
|
|
}
|
|
else if ( cs_sah == 0 ) {
|
|
// ---> progressive interleaved DC decoding <---
|
|
// ---> succesive approximation first stage <---
|
|
while ( sta == 0 ) {
|
|
sta = jpg_decode_dc_prg_fs( huffr,
|
|
&(htrees[ 0 ][ cmpnfo[cmp].huffdc ]),
|
|
block );
|
|
|
|
// fix dc for diff coding
|
|
colldata[cmp][0][dpos] = block[0] + lastdc[ cmp ];
|
|
lastdc[ cmp ] = colldata[cmp][0][dpos];
|
|
|
|
// bitshift for succesive approximation
|
|
colldata[cmp][0][dpos] <<= cs_sal;
|
|
|
|
// next mcupos if no error happened
|
|
if ( sta != -1 )
|
|
sta = jpg_next_mcupos( &mcu, &cmp, &csc, &sub, &dpos, &rstw );
|
|
}
|
|
}
|
|
else {
|
|
// ---> progressive interleaved DC decoding <---
|
|
// ---> succesive approximation later stage <---
|
|
while ( sta == 0 ) {
|
|
// decode next bit
|
|
sta = jpg_decode_dc_prg_sa( huffr,
|
|
block );
|
|
|
|
// shift in next bit
|
|
colldata[cmp][0][dpos] += block[0] << cs_sal;
|
|
|
|
// next mcupos if no error happened
|
|
if ( sta != -1 )
|
|
sta = jpg_next_mcupos( &mcu, &cmp, &csc, &sub, &dpos, &rstw );
|
|
}
|
|
}
|
|
}
|
|
else // decoding for non interleaved data
|
|
{
|
|
if ( jpegtype == 1 ) {
|
|
// ---> sequential non interleaved decoding <---
|
|
while ( sta == 0 ) {
|
|
// decode block
|
|
eob = jpg_decode_block_seq( huffr,
|
|
&(htrees[ 0 ][ cmpnfo[cmp].huffdc ]),
|
|
&(htrees[ 1 ][ cmpnfo[cmp].huffdc ]),
|
|
block );
|
|
|
|
// fix dc
|
|
block[ 0 ] += lastdc[ cmp ];
|
|
lastdc[ cmp ] = block[ 0 ];
|
|
|
|
// copy to colldata
|
|
for ( bpos = 0; bpos < eob; bpos++ )
|
|
colldata[ cmp ][ bpos ][ dpos ] = block[ bpos ];
|
|
|
|
// check for errors, proceed if no error encountered
|
|
if ( eob < 0 ) sta = -1;
|
|
else sta = jpg_next_mcuposn( &cmp, &dpos, &rstw );
|
|
}
|
|
}
|
|
else if ( cs_to == 0 ) {
|
|
if ( cs_sah == 0 ) {
|
|
// ---> progressive non interleaved DC decoding <---
|
|
// ---> succesive approximation first stage <---
|
|
while ( sta == 0 ) {
|
|
sta = jpg_decode_dc_prg_fs( huffr,
|
|
&(htrees[ 0 ][ cmpnfo[cmp].huffdc ]),
|
|
block );
|
|
|
|
// fix dc for diff coding
|
|
colldata[cmp][0][dpos] = block[0] + lastdc[ cmp ];
|
|
lastdc[ cmp ] = colldata[cmp][0][dpos];
|
|
|
|
// bitshift for succesive approximation
|
|
colldata[cmp][0][dpos] <<= cs_sal;
|
|
|
|
// check for errors, increment dpos otherwise
|
|
if ( sta != -1 )
|
|
sta = jpg_next_mcuposn( &cmp, &dpos, &rstw );
|
|
}
|
|
}
|
|
else {
|
|
// ---> progressive non interleaved DC decoding <---
|
|
// ---> succesive approximation later stage <---
|
|
while( sta == 0 ) {
|
|
// decode next bit
|
|
sta = jpg_decode_dc_prg_sa( huffr,
|
|
block );
|
|
|
|
// shift in next bit
|
|
colldata[cmp][0][dpos] += block[0] << cs_sal;
|
|
|
|
// check for errors, increment dpos otherwise
|
|
if ( sta != -1 )
|
|
sta = jpg_next_mcuposn( &cmp, &dpos, &rstw );
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
if ( cs_sah == 0 ) {
|
|
// ---> progressive non interleaved AC decoding <---
|
|
// ---> succesive approximation first stage <---
|
|
while ( sta == 0 ) {
|
|
if ( eobrun == 0 ) {
|
|
// decode block
|
|
eob = jpg_decode_ac_prg_fs( huffr,
|
|
&(htrees[ 1 ][ cmpnfo[cmp].huffac ]),
|
|
block, &eobrun, cs_from, cs_to );
|
|
|
|
if ( eobrun > 0 ) {
|
|
// check for non optimal coding
|
|
if ( ( eob == cs_from ) && ( peobrun > 0 ) &&
|
|
( peobrun < hcodes[ 1 ][ cmpnfo[cmp].huffac ].max_eobrun - 1 ) ) {
|
|
sprintf( errormessage,
|
|
"reconstruction of non optimal coding not supported" );
|
|
errorlevel = 1;
|
|
}
|
|
peobrun = eobrun;
|
|
eobrun--;
|
|
} else peobrun = 0;
|
|
|
|
// copy to colldata
|
|
for ( bpos = cs_from; bpos < eob; bpos++ )
|
|
colldata[ cmp ][ bpos ][ dpos ] = block[ bpos ] << cs_sal;
|
|
} else eobrun--;
|
|
|
|
// check for errors
|
|
if ( eob < 0 ) sta = -1;
|
|
else sta = jpg_skip_eobrun( &cmp, &dpos, &rstw, &eobrun );
|
|
|
|
// proceed only if no error encountered
|
|
if ( sta == 0 )
|
|
sta = jpg_next_mcuposn( &cmp, &dpos, &rstw );
|
|
}
|
|
}
|
|
else {
|
|
// ---> progressive non interleaved AC decoding <---
|
|
// ---> succesive approximation later stage <---
|
|
while ( sta == 0 ) {
|
|
// copy from colldata
|
|
for ( bpos = cs_from; bpos <= cs_to; bpos++ )
|
|
block[ bpos ] = colldata[ cmp ][ bpos ][ dpos ];
|
|
|
|
if ( eobrun == 0 ) {
|
|
// decode block (long routine)
|
|
eob = jpg_decode_ac_prg_sa( huffr,
|
|
&(htrees[ 1 ][ cmpnfo[cmp].huffac ]),
|
|
block, &eobrun, cs_from, cs_to );
|
|
|
|
if ( eobrun > 0 ) {
|
|
// check for non optimal coding
|
|
if ( ( eob == cs_from ) && ( peobrun > 0 ) &&
|
|
( peobrun < hcodes[ 1 ][ cmpnfo[cmp].huffac ].max_eobrun - 1 ) ) {
|
|
sprintf( errormessage,
|
|
"reconstruction of non optimal coding not supported" );
|
|
errorlevel = 1;
|
|
}
|
|
|
|
// store eobrun
|
|
peobrun = eobrun;
|
|
eobrun--;
|
|
} else peobrun = 0;
|
|
}
|
|
else {
|
|
// decode block (short routine)
|
|
eob = jpg_decode_eobrun_sa( huffr,
|
|
block, &eobrun, cs_from, cs_to );
|
|
eobrun--;
|
|
}
|
|
|
|
// copy back to colldata
|
|
for ( bpos = cs_from; bpos <= cs_to; bpos++ )
|
|
colldata[ cmp ][ bpos ][ dpos ] += block[ bpos ] << cs_sal;
|
|
|
|
// proceed only if no error encountered
|
|
if ( eob < 0 ) sta = -1;
|
|
else sta = jpg_next_mcuposn( &cmp, &dpos, &rstw );
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// unpad huffman reader / check padbit
|
|
if ( padbit != -1 ) {
|
|
if ( padbit != huffr->unpad( padbit ) ) {
|
|
sprintf( errormessage, "inconsistent use of padbits" );
|
|
padbit = 1;
|
|
errorlevel = 1;
|
|
}
|
|
}
|
|
else {
|
|
padbit = huffr->unpad( padbit );
|
|
}
|
|
|
|
// evaluate status
|
|
if ( sta == -1 ) { // status -1 means error
|
|
sprintf( errormessage, "decode error in scan%i / mcu%i",
|
|
scnc, ( cs_cmpc > 1 ) ? mcu : dpos );
|
|
delete huffr;
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
else if ( sta == 2 ) { // status 2/3 means done
|
|
scnc++; // increment scan counter
|
|
break; // leave decoding loop, everything is done here
|
|
}
|
|
// else if ( sta == 1 ); // status 1 means restart - so stay in the loop
|
|
}
|
|
}
|
|
|
|
// check for missing data
|
|
if ( huffr->peof ) {
|
|
sprintf( errormessage, "coded image data truncated / too short" );
|
|
errorlevel = 1;
|
|
}
|
|
|
|
// check for surplus data
|
|
if ( !huffr->eof ) {
|
|
sprintf( errormessage, "surplus data found after coded image data" );
|
|
errorlevel = 1;
|
|
}
|
|
|
|
// clean up
|
|
delete( huffr );
|
|
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
JPEG encoding routine
|
|
----------------------------------------------- */
|
|
|
|
INTERN bool recode_jpeg( void )
|
|
{
|
|
abitwriter* huffw; // bitwise writer for image data
|
|
abytewriter* storw; // bytewise writer for storage of correction bits
|
|
|
|
unsigned char type = 0x00; // type of current marker segment
|
|
unsigned int len = 0; // length of current marker segment
|
|
unsigned int hpos = 0; // current position in header
|
|
|
|
int lastdc[ 4 ]; // last dc for each component0
|
|
short block[ 64 ]; // store block for coeffs
|
|
int eobrun; // run of eobs
|
|
int rstw; // restart wait counter
|
|
|
|
int cmp, bpos, dpos;
|
|
int mcu, sub, csc;
|
|
int eob, sta;
|
|
int tmp;
|
|
|
|
|
|
// open huffman coded image data in abitwriter
|
|
huffw = new abitwriter( 0 );
|
|
huffw->fillbit = padbit;
|
|
|
|
// init storage writer
|
|
storw = new abytewriter( 0 );
|
|
|
|
// preset count of scans and restarts
|
|
scnc = 0;
|
|
rstc = 0;
|
|
|
|
// JPEG decompression loop
|
|
while ( true )
|
|
{
|
|
// seek till start-of-scan, parse only DHT, DRI and SOS
|
|
for ( type = 0x00; type != 0xDA; ) {
|
|
if ( ( int ) hpos >= hdrs ) break;
|
|
type = hdrdata[ hpos + 1 ];
|
|
len = 2 + B_SHORT( hdrdata[ hpos + 2 ], hdrdata[ hpos + 3 ] );
|
|
if ( ( type == 0xC4 ) || ( type == 0xDA ) || ( type == 0xDD ) ) {
|
|
if ( !jpg_parse_jfif( type, len, &( hdrdata[ hpos ] ) ) ) {
|
|
return false;
|
|
}
|
|
hpos += len;
|
|
}
|
|
else {
|
|
hpos += len;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
// get out if last marker segment type was not SOS
|
|
if ( type != 0xDA ) break;
|
|
|
|
|
|
// (re)alloc scan positons array
|
|
if ( scnp == NULL ) scnp = ( unsigned int* ) calloc( scnc + 2, sizeof( int ) );
|
|
else scnp = ( unsigned int* ) realloc( scnp, ( scnc + 2 ) * sizeof( int ) );
|
|
if ( scnp == NULL ) {
|
|
sprintf( errormessage, MEM_ERRMSG );
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
|
|
// (re)alloc restart marker positons array if needed
|
|
if ( rsti > 0 ) {
|
|
tmp = rstc + ( ( cs_cmpc > 1 ) ?
|
|
( mcuc / rsti ) : ( cmpnfo[ cs_cmp[ 0 ] ].bc / rsti ) );
|
|
if ( rstp == NULL ) rstp = ( unsigned int* ) calloc( tmp + 1, sizeof( int ) );
|
|
else rstp = ( unsigned int* ) realloc( rstp, ( tmp + 1 ) * sizeof( int ) );
|
|
if ( rstp == NULL ) {
|
|
sprintf( errormessage, MEM_ERRMSG );
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
}
|
|
|
|
// intial variables set for encoding
|
|
cmp = cs_cmp[ 0 ];
|
|
csc = 0;
|
|
mcu = 0;
|
|
sub = 0;
|
|
dpos = 0;
|
|
|
|
// store scan position
|
|
scnp[ scnc ] = huffw->getpos();
|
|
|
|
// JPEG imagedata encoding routines
|
|
while ( true )
|
|
{
|
|
// (re)set last DCs for diff coding
|
|
lastdc[ 0 ] = 0;
|
|
lastdc[ 1 ] = 0;
|
|
lastdc[ 2 ] = 0;
|
|
lastdc[ 3 ] = 0;
|
|
|
|
// (re)set status
|
|
sta = 0;
|
|
|
|
// (re)set eobrun
|
|
eobrun = 0;
|
|
|
|
// (re)set rst wait counter
|
|
rstw = rsti;
|
|
|
|
// encoding for interleaved data
|
|
if ( cs_cmpc > 1 )
|
|
{
|
|
if ( jpegtype == 1 ) {
|
|
// ---> sequential interleaved encoding <---
|
|
while ( sta == 0 ) {
|
|
// copy from colldata
|
|
for ( bpos = 0; bpos < 64; bpos++ )
|
|
block[ bpos ] = colldata[ cmp ][ bpos ][ dpos ];
|
|
|
|
// diff coding for dc
|
|
block[ 0 ] -= lastdc[ cmp ];
|
|
lastdc[ cmp ] = colldata[ cmp ][ 0 ][ dpos ];
|
|
|
|
// encode block
|
|
eob = jpg_encode_block_seq( huffw,
|
|
&(hcodes[ 0 ][ cmpnfo[cmp].huffac ]),
|
|
&(hcodes[ 1 ][ cmpnfo[cmp].huffac ]),
|
|
block );
|
|
|
|
// check for errors, proceed if no error encountered
|
|
if ( eob < 0 ) sta = -1;
|
|
else sta = jpg_next_mcupos( &mcu, &cmp, &csc, &sub, &dpos, &rstw );
|
|
}
|
|
}
|
|
else if ( cs_sah == 0 ) {
|
|
// ---> progressive interleaved DC encoding <---
|
|
// ---> succesive approximation first stage <---
|
|
while ( sta == 0 ) {
|
|
// diff coding & bitshifting for dc
|
|
tmp = colldata[ cmp ][ 0 ][ dpos ] >> cs_sal;
|
|
block[ 0 ] = tmp - lastdc[ cmp ];
|
|
lastdc[ cmp ] = tmp;
|
|
|
|
// encode dc
|
|
sta = jpg_encode_dc_prg_fs( huffw,
|
|
&(hcodes[ 0 ][ cmpnfo[cmp].huffdc ]),
|
|
block );
|
|
|
|
// next mcupos if no error happened
|
|
if ( sta != -1 )
|
|
sta = jpg_next_mcupos( &mcu, &cmp, &csc, &sub, &dpos, &rstw );
|
|
}
|
|
}
|
|
else {
|
|
// ---> progressive interleaved DC encoding <---
|
|
// ---> succesive approximation later stage <---
|
|
while ( sta == 0 ) {
|
|
// fetch bit from current bitplane
|
|
block[ 0 ] = BITN( colldata[ cmp ][ 0 ][ dpos ], cs_sal );
|
|
|
|
// encode dc correction bit
|
|
sta = jpg_encode_dc_prg_sa( huffw, block );
|
|
|
|
// next mcupos if no error happened
|
|
if ( sta != -1 )
|
|
sta = jpg_next_mcupos( &mcu, &cmp, &csc, &sub, &dpos, &rstw );
|
|
}
|
|
}
|
|
}
|
|
else // encoding for non interleaved data
|
|
{
|
|
if ( jpegtype == 1 ) {
|
|
// ---> sequential non interleaved encoding <---
|
|
while ( sta == 0 ) {
|
|
// copy from colldata
|
|
for ( bpos = 0; bpos < 64; bpos++ )
|
|
block[ bpos ] = colldata[ cmp ][ bpos ][ dpos ];
|
|
|
|
// diff coding for dc
|
|
block[ 0 ] -= lastdc[ cmp ];
|
|
lastdc[ cmp ] = colldata[ cmp ][ 0 ][ dpos ];
|
|
|
|
// encode block
|
|
eob = jpg_encode_block_seq( huffw,
|
|
&(hcodes[ 0 ][ cmpnfo[cmp].huffac ]),
|
|
&(hcodes[ 1 ][ cmpnfo[cmp].huffac ]),
|
|
block );
|
|
|
|
// check for errors, proceed if no error encountered
|
|
if ( eob < 0 ) sta = -1;
|
|
else sta = jpg_next_mcuposn( &cmp, &dpos, &rstw );
|
|
}
|
|
}
|
|
else if ( cs_to == 0 ) {
|
|
if ( cs_sah == 0 ) {
|
|
// ---> progressive non interleaved DC encoding <---
|
|
// ---> succesive approximation first stage <---
|
|
while ( sta == 0 ) {
|
|
// diff coding & bitshifting for dc
|
|
tmp = colldata[ cmp ][ 0 ][ dpos ] >> cs_sal;
|
|
block[ 0 ] = tmp - lastdc[ cmp ];
|
|
lastdc[ cmp ] = tmp;
|
|
|
|
// encode dc
|
|
sta = jpg_encode_dc_prg_fs( huffw,
|
|
&(hcodes[ 0 ][ cmpnfo[cmp].huffdc ]),
|
|
block );
|
|
|
|
// check for errors, increment dpos otherwise
|
|
if ( sta != -1 )
|
|
sta = jpg_next_mcuposn( &cmp, &dpos, &rstw );
|
|
}
|
|
}
|
|
else {
|
|
// ---> progressive non interleaved DC encoding <---
|
|
// ---> succesive approximation later stage <---
|
|
while ( sta == 0 ) {
|
|
// fetch bit from current bitplane
|
|
block[ 0 ] = BITN( colldata[ cmp ][ 0 ][ dpos ], cs_sal );
|
|
|
|
// encode dc correction bit
|
|
sta = jpg_encode_dc_prg_sa( huffw, block );
|
|
|
|
// next mcupos if no error happened
|
|
if ( sta != -1 )
|
|
sta = jpg_next_mcuposn( &cmp, &dpos, &rstw );
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
if ( cs_sah == 0 ) {
|
|
// ---> progressive non interleaved AC encoding <---
|
|
// ---> succesive approximation first stage <---
|
|
while ( sta == 0 ) {
|
|
// copy from colldata
|
|
for ( bpos = cs_from; bpos <= cs_to; bpos++ )
|
|
block[ bpos ] =
|
|
FDIV2( colldata[ cmp ][ bpos ][ dpos ], cs_sal );
|
|
|
|
// encode block
|
|
eob = jpg_encode_ac_prg_fs( huffw,
|
|
&(hcodes[ 1 ][ cmpnfo[cmp].huffac ]),
|
|
block, &eobrun, cs_from, cs_to );
|
|
|
|
// check for errors, proceed if no error encountered
|
|
if ( eob < 0 ) sta = -1;
|
|
else sta = jpg_next_mcuposn( &cmp, &dpos, &rstw );
|
|
}
|
|
|
|
// encode remaining eobrun
|
|
jpg_encode_eobrun( huffw,
|
|
&(hcodes[ 1 ][ cmpnfo[cmp].huffac ]),
|
|
&eobrun );
|
|
}
|
|
else {
|
|
// ---> progressive non interleaved AC encoding <---
|
|
// ---> succesive approximation later stage <---
|
|
while ( sta == 0 ) {
|
|
// copy from colldata
|
|
for ( bpos = cs_from; bpos <= cs_to; bpos++ )
|
|
block[ bpos ] =
|
|
FDIV2( colldata[ cmp ][ bpos ][ dpos ], cs_sal );
|
|
|
|
// encode block
|
|
eob = jpg_encode_ac_prg_sa( huffw, storw,
|
|
&(hcodes[ 1 ][ cmpnfo[cmp].huffac ]),
|
|
block, &eobrun, cs_from, cs_to );
|
|
|
|
// check for errors, proceed if no error encountered
|
|
if ( eob < 0 ) sta = -1;
|
|
else sta = jpg_next_mcuposn( &cmp, &dpos, &rstw );
|
|
}
|
|
|
|
// encode remaining eobrun
|
|
jpg_encode_eobrun( huffw,
|
|
&(hcodes[ 1 ][ cmpnfo[cmp].huffac ]),
|
|
&eobrun );
|
|
|
|
// encode remaining correction bits
|
|
jpg_encode_crbits( huffw, storw );
|
|
}
|
|
}
|
|
}
|
|
|
|
// pad huffman writer
|
|
huffw->pad( padbit );
|
|
|
|
// evaluate status
|
|
if ( sta == -1 ) { // status -1 means error
|
|
sprintf( errormessage, "encode error in scan%i / mcu%i",
|
|
scnc, ( cs_cmpc > 1 ) ? mcu : dpos );
|
|
delete huffw;
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
else if ( sta == 2 ) { // status 2 means done
|
|
scnc++; // increment scan counter
|
|
break; // leave decoding loop, everything is done here
|
|
}
|
|
else if ( sta == 1 ) { // status 1 means restart
|
|
if ( rsti > 0 ) // store rstp & stay in the loop
|
|
rstp[ rstc++ ] = huffw->getpos() - 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
// safety check for error in huffwriter
|
|
if ( huffw->error ) {
|
|
delete huffw;
|
|
sprintf( errormessage, MEM_ERRMSG );
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
|
|
// get data into huffdata
|
|
huffdata = huffw->getptr();
|
|
hufs = huffw->getpos();
|
|
delete huffw;
|
|
|
|
// remove storage writer
|
|
delete storw;
|
|
|
|
// store last scan & restart positions
|
|
scnp[ scnc ] = hufs;
|
|
if ( rstp != NULL )
|
|
rstp[ rstc ] = hufs;
|
|
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
adapt ICOS tables for quantizer tables
|
|
----------------------------------------------- */
|
|
|
|
INTERN bool adapt_icos( void )
|
|
{
|
|
unsigned short quant[ 64 ]; // local copy of quantization
|
|
int ipos;
|
|
int cmp;
|
|
|
|
|
|
for ( cmp = 0; cmp < cmpc; cmp++ ) {
|
|
// make a local copy of the quantization values, check
|
|
for ( ipos = 0; ipos < 64; ipos++ ) {
|
|
quant[ ipos ] = QUANT( cmp, zigzag[ ipos ] );
|
|
if ( quant[ ipos ] >= 2048 ) // if this is true, it can be safely assumed (for 8 bit JPEG), that all coefficients are zero
|
|
quant[ ipos ] = 0;
|
|
}
|
|
// adapt idct 8x8 table
|
|
for ( ipos = 0; ipos < 64 * 64; ipos++ )
|
|
adpt_idct_8x8[ cmp ][ ipos ] = icos_idct_8x8[ ipos ] * quant[ ipos % 64 ];
|
|
// adapt idct 1x8 table
|
|
for ( ipos = 0; ipos < 8 * 8; ipos++ )
|
|
adpt_idct_1x8[ cmp ][ ipos ] = icos_idct_1x8[ ipos ] * quant[ ( ipos % 8 ) * 8 ];
|
|
// adapt idct 8x1 table
|
|
for ( ipos = 0; ipos < 8 * 8; ipos++ )
|
|
adpt_idct_8x1[ cmp ][ ipos ] = icos_idct_1x8[ ipos ] * quant[ ipos % 8 ];
|
|
}
|
|
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
filter DC coefficients
|
|
----------------------------------------------- */
|
|
|
|
INTERN bool predict_dc( void )
|
|
{
|
|
signed short* coef;
|
|
int absmaxp;
|
|
int absmaxn;
|
|
int corr_f;
|
|
int cmp, dpos;
|
|
|
|
|
|
// apply prediction, store prediction error instead of DC
|
|
for ( cmp = 0; cmp < cmpc; cmp++ ) {
|
|
absmaxp = MAX_V( cmp, 0 );
|
|
absmaxn = -absmaxp;
|
|
corr_f = ( ( 2 * absmaxp ) + 1 );
|
|
|
|
for ( dpos = cmpnfo[cmp].bc - 1; dpos > 0; dpos-- ) {
|
|
coef = &(colldata[cmp][0][dpos]);
|
|
#if defined( USE_PLOCOI )
|
|
(*coef) -= dc_coll_predictor( cmp, dpos ); // loco-i predictor
|
|
#else
|
|
(*coef) -= dc_1ddct_predictor( cmp, dpos ); // 1d dct
|
|
#endif
|
|
|
|
// fix range
|
|
if ( (*coef) > absmaxp ) (*coef) -= corr_f;
|
|
else if ( (*coef) < absmaxn ) (*coef) += corr_f;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
unpredict DC coefficients
|
|
----------------------------------------------- */
|
|
|
|
INTERN bool unpredict_dc( void )
|
|
{
|
|
signed short* coef;
|
|
int absmaxp;
|
|
int absmaxn;
|
|
int corr_f;
|
|
int cmp, dpos;
|
|
|
|
|
|
// remove prediction, store DC instead of prediction error
|
|
for ( cmp = 0; cmp < cmpc; cmp++ ) {
|
|
absmaxp = MAX_V( cmp, 0 );
|
|
absmaxn = -absmaxp;
|
|
corr_f = ( ( 2 * absmaxp ) + 1 );
|
|
|
|
for ( dpos = 1; dpos < cmpnfo[cmp].bc; dpos++ ) {
|
|
coef = &(colldata[cmp][0][dpos]);
|
|
#if defined( USE_PLOCOI )
|
|
(*coef) += dc_coll_predictor( cmp, dpos ); // loco-i predictor
|
|
#else
|
|
(*coef) += dc_1ddct_predictor( cmp, dpos ); // 1d dct predictor
|
|
#endif
|
|
|
|
// fix range
|
|
if ( (*coef) > absmaxp ) (*coef) -= corr_f;
|
|
else if ( (*coef) < absmaxn ) (*coef) += corr_f;
|
|
}
|
|
}
|
|
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
checks range of values, error if out of bounds
|
|
----------------------------------------------- */
|
|
|
|
INTERN bool check_value_range( void )
|
|
{
|
|
int absmax;
|
|
int cmp, bpos, dpos;
|
|
|
|
// out of range should never happen with unmodified JPEGs
|
|
for ( cmp = 0; cmp < cmpc; cmp++ )
|
|
for ( bpos = 0; bpos < 64; bpos++ ) {
|
|
absmax = MAX_V( cmp, bpos );
|
|
for ( dpos = 0; dpos < cmpnfo[cmp].bc; dpos++ )
|
|
if ( ( colldata[cmp][bpos][dpos] > absmax ) ||
|
|
( colldata[cmp][bpos][dpos] < -absmax ) ) {
|
|
sprintf( errormessage, "value out of range error: cmp%i, frq%i, val %i, max %i",
|
|
cmp, bpos, colldata[cmp][bpos][dpos], absmax );
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
}
|
|
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
calculate zero distribution lists
|
|
----------------------------------------------- */
|
|
|
|
INTERN bool calc_zdst_lists( void )
|
|
{
|
|
int cmp, bpos, dpos;
|
|
int b_x, b_y;
|
|
|
|
|
|
// this functions counts, for each DCT block, the number of non-zero coefficients
|
|
for ( cmp = 0; cmp < cmpc; cmp++ )
|
|
{
|
|
// preset zdstlist
|
|
memset( zdstdata[cmp], 0, cmpnfo[cmp].bc * sizeof( char ) );
|
|
|
|
// calculate # on non-zeroes per block (separately for lower 7x7 block & first row/collumn)
|
|
for ( bpos = 1; bpos < 64; bpos++ ) {
|
|
b_x = unzigzag[ bpos ] % 8;
|
|
b_y = unzigzag[ bpos ] / 8;
|
|
if ( b_x == 0 ) {
|
|
for ( dpos = 0; dpos < cmpnfo[cmp].bc; dpos++ )
|
|
if ( colldata[cmp][bpos][dpos] != 0 ) zdstylow[cmp][dpos]++;
|
|
}
|
|
else if ( b_y == 0 ) {
|
|
for ( dpos = 0; dpos < cmpnfo[cmp].bc; dpos++ )
|
|
if ( colldata[cmp][bpos][dpos] != 0 ) zdstxlow[cmp][dpos]++;
|
|
}
|
|
else {
|
|
for ( dpos = 0; dpos < cmpnfo[cmp].bc; dpos++ )
|
|
if ( colldata[cmp][bpos][dpos] != 0 ) zdstdata[cmp][dpos]++;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
packs all parts to compressed pjg
|
|
----------------------------------------------- */
|
|
|
|
INTERN bool pack_pjg( void )
|
|
{
|
|
aricoder* encoder;
|
|
unsigned char hcode;
|
|
int cmp;
|
|
#if defined(DEV_INFOS)
|
|
int dev_size = 0;
|
|
#endif
|
|
|
|
|
|
// PJG-Header
|
|
str_out->write( (void*) pjg_magic, 1, 2 );
|
|
|
|
// store settings if not auto
|
|
if ( !auto_set ) {
|
|
hcode = 0x00;
|
|
str_out->write( &hcode, 1, 1 );
|
|
str_out->write( nois_trs, 1, 4 );
|
|
str_out->write( segm_cnt, 1, 4 );
|
|
}
|
|
|
|
// store version number
|
|
hcode = appversion;
|
|
str_out->write( &hcode, 1, 1 );
|
|
|
|
|
|
// init arithmetic compression
|
|
encoder = new aricoder( str_out, 1 );
|
|
|
|
// discard meta information from header if option set
|
|
if ( disc_meta )
|
|
if ( !jpg_rebuild_header() ) return false;
|
|
// optimize header for compression
|
|
if ( !pjg_optimize_header() ) return false;
|
|
// set padbit to 1 if previously unset
|
|
if ( padbit == -1 ) padbit = 1;
|
|
|
|
// encode JPG header
|
|
#if !defined(DEV_INFOS)
|
|
if ( !pjg_encode_generic( encoder, hdrdata, hdrs ) ) return false;
|
|
#else
|
|
dev_size = str_out->getpos();
|
|
if ( !pjg_encode_generic( encoder, hdrdata, hdrs ) ) return false;
|
|
dev_size_hdr += str_out->getpos() - dev_size;
|
|
#endif
|
|
// store padbit (padbit can't be retrieved from the header)
|
|
if ( !pjg_encode_bit( encoder, padbit ) ) return false;
|
|
// also encode one bit to signal false/correct use of RST markers
|
|
if ( !pjg_encode_bit( encoder, ( rst_err == NULL ) ? 0 : 1 ) ) return false;
|
|
// encode # of false set RST markers per scan
|
|
if ( rst_err != NULL )
|
|
if ( !pjg_encode_generic( encoder, rst_err, scnc ) ) return false;
|
|
|
|
// encode actual components data
|
|
for ( cmp = 0; cmp < cmpc; cmp++ ) {
|
|
#if !defined(DEV_INFOS)
|
|
// encode frequency scan ('zero-sort-scan')
|
|
if ( !pjg_encode_zstscan( encoder, cmp ) ) return false;
|
|
// encode zero-distribution-lists for higher (7x7) ACs
|
|
if ( !pjg_encode_zdst_high( encoder, cmp ) ) return false;
|
|
// encode coefficients for higher (7x7) ACs
|
|
if ( !pjg_encode_ac_high( encoder, cmp ) ) return false;
|
|
// encode zero-distribution-lists for lower ACs
|
|
if ( !pjg_encode_zdst_low( encoder, cmp ) ) return false;
|
|
// encode coefficients for first row / collumn ACs
|
|
if ( !pjg_encode_ac_low( encoder, cmp ) ) return false;
|
|
// encode coefficients for DC
|
|
if ( !pjg_encode_dc( encoder, cmp ) ) return false;
|
|
#else
|
|
dev_size = str_out->getpos();
|
|
// encode frequency scan ('zero-sort-scan')
|
|
if ( !pjg_encode_zstscan( encoder, cmp ) ) return false;
|
|
dev_size_zsr[ cmp ] += str_out->getpos() - dev_size;
|
|
dev_size = str_out->getpos();
|
|
// encode zero-distribution-lists for higher (7x7) ACs
|
|
if ( !pjg_encode_zdst_high( encoder, cmp ) ) return false;
|
|
dev_size_zdh[ cmp ] += str_out->getpos() - dev_size;
|
|
dev_size = str_out->getpos();
|
|
// encode coefficients for higher (7x7) ACs
|
|
if ( !pjg_encode_ac_high( encoder, cmp ) ) return false;
|
|
dev_size_ach[ cmp ] += str_out->getpos() - dev_size;
|
|
dev_size = str_out->getpos();
|
|
// encode zero-distribution-lists for lower ACs
|
|
if ( !pjg_encode_zdst_low( encoder, cmp ) ) return false;
|
|
dev_size_zdl[ cmp ] += str_out->getpos() - dev_size;
|
|
dev_size = str_out->getpos();
|
|
// encode coefficients for first row / collumn ACs
|
|
if ( !pjg_encode_ac_low( encoder, cmp ) ) return false;
|
|
dev_size_acl[ cmp ] += str_out->getpos() - dev_size;
|
|
dev_size = str_out->getpos();
|
|
// encode coefficients for DC
|
|
if ( !pjg_encode_dc( encoder, cmp ) ) return false;
|
|
dev_size_dc[ cmp ] += str_out->getpos() - dev_size;
|
|
dev_size_cmp[ cmp ] =
|
|
dev_size_zsr[ cmp ] + dev_size_zdh[ cmp ] + dev_size_zdl[ cmp ] +
|
|
dev_size_ach[ cmp ] + dev_size_acl[ cmp ] + dev_size_dc[ cmp ];
|
|
#endif
|
|
}
|
|
|
|
// encode checkbit for garbage (0 if no garbage, 1 if garbage has to be coded)
|
|
if ( !pjg_encode_bit( encoder, ( grbs > 0 ) ? 1 : 0 ) ) return false;
|
|
// encode garbage data only if needed
|
|
if ( grbs > 0 )
|
|
if ( !pjg_encode_generic( encoder, grbgdata, grbs ) ) return false;
|
|
|
|
// finalize arithmetic compression
|
|
delete( encoder );
|
|
|
|
|
|
// errormessage if write error
|
|
if ( str_out->chkerr() ) {
|
|
sprintf( errormessage, "write error, possibly drive is full" );
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
|
|
// get filesize
|
|
pjgfilesize = str_out->getsize();
|
|
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
unpacks compressed pjg to colldata
|
|
----------------------------------------------- */
|
|
|
|
INTERN bool unpack_pjg( void )
|
|
{
|
|
aricoder* decoder;
|
|
unsigned char hcode;
|
|
unsigned char cb;
|
|
int cmp;
|
|
|
|
|
|
// check header codes ( maybe position in other function ? )
|
|
while( true ) {
|
|
str_in->read( &hcode, 1, 1 );
|
|
if ( hcode == 0x00 ) {
|
|
// retrieve compression settings from file
|
|
str_in->read( nois_trs, 1, 4 );
|
|
str_in->read( segm_cnt, 1, 4 );
|
|
auto_set = false;
|
|
}
|
|
else if ( hcode >= 0x14 ) {
|
|
// compare version number
|
|
if ( hcode != appversion ) {
|
|
sprintf( errormessage, "incompatible file, use %s v%i.%i",
|
|
appname, hcode / 10, hcode % 10 );
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
else break;
|
|
}
|
|
else {
|
|
sprintf( errormessage, "unknown header code, use newer version of %s", appname );
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
}
|
|
|
|
|
|
// init arithmetic compression
|
|
decoder = new aricoder( str_in, 0 );
|
|
|
|
// decode JPG header
|
|
if ( !pjg_decode_generic( decoder, &hdrdata, &hdrs ) ) return false;
|
|
// retrieve padbit from stream
|
|
if ( !pjg_decode_bit( decoder, &cb ) ) return false; padbit = cb;
|
|
// decode one bit that signals false /correct use of RST markers
|
|
if ( !pjg_decode_bit( decoder, &cb ) ) return false;
|
|
// decode # of false set RST markers per scan only if available
|
|
if ( cb == 1 )
|
|
if ( !pjg_decode_generic( decoder, &rst_err, NULL ) ) return false;
|
|
|
|
// undo header optimizations
|
|
if ( !pjg_unoptimize_header() ) return false;
|
|
// discard meta information from header if option set
|
|
if ( disc_meta )
|
|
if ( !jpg_rebuild_header() ) return false;
|
|
// parse header for image-info
|
|
if ( !jpg_setup_imginfo() ) return false;
|
|
|
|
// decode actual components data
|
|
for ( cmp = 0; cmp < cmpc; cmp++ ) {
|
|
// decode frequency scan ('zero-sort-scan')
|
|
if ( !pjg_decode_zstscan( decoder, cmp ) ) return false;
|
|
// decode zero-distribution-lists for higher (7x7) ACs
|
|
if ( !pjg_decode_zdst_high( decoder, cmp ) ) return false;
|
|
// decode coefficients for higher (7x7) ACs
|
|
if ( !pjg_decode_ac_high( decoder, cmp ) ) return false;
|
|
// decode zero-distribution-lists for lower ACs
|
|
if ( !pjg_decode_zdst_low( decoder, cmp ) ) return false;
|
|
// decode coefficients for first row / collumn ACs
|
|
if ( !pjg_decode_ac_low( decoder, cmp ) ) return false;
|
|
// decode coefficients for DC
|
|
if ( !pjg_decode_dc( decoder, cmp ) ) return false;
|
|
}
|
|
|
|
// retrieve checkbit for garbage (0 if no garbage, 1 if garbage has to be coded)
|
|
if ( !pjg_decode_bit( decoder, &cb ) ) return false;
|
|
|
|
// decode garbage data only if available
|
|
if ( cb == 0 ) grbs = 0;
|
|
else if ( !pjg_decode_generic( decoder, &grbgdata, &grbs ) ) return false;
|
|
|
|
// finalize arithmetic compression
|
|
delete( decoder );
|
|
|
|
|
|
// get filesize
|
|
pjgfilesize = str_in->getsize();
|
|
|
|
|
|
return true;
|
|
}
|
|
|
|
/* ----------------------- End of main functions -------------------------- */
|
|
|
|
/* ----------------------- Begin of JPEG specific functions -------------------------- */
|
|
|
|
|
|
/* -----------------------------------------------
|
|
Parses header for imageinfo
|
|
----------------------------------------------- */
|
|
INTERN bool jpg_setup_imginfo( void )
|
|
{
|
|
unsigned char type = 0x00; // type of current marker segment
|
|
unsigned int len = 0; // length of current marker segment
|
|
unsigned int hpos = 0; // position in header
|
|
|
|
int cmp, bpos;
|
|
int i;
|
|
|
|
// header parser loop
|
|
while ( ( int ) hpos < hdrs ) {
|
|
type = hdrdata[ hpos + 1 ];
|
|
len = 2 + B_SHORT( hdrdata[ hpos + 2 ], hdrdata[ hpos + 3 ] );
|
|
// do not parse DHT & DRI
|
|
if ( ( type != 0xDA ) && ( type != 0xC4 ) && ( type != 0xDD ) ) {
|
|
if ( !jpg_parse_jfif( type, len, &( hdrdata[ hpos ] ) ) )
|
|
return false;
|
|
}
|
|
hpos += len;
|
|
}
|
|
|
|
// check if information is complete
|
|
if ( cmpc == 0 ) {
|
|
sprintf( errormessage, "header contains incomplete information" );
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
for ( cmp = 0; cmp < cmpc; cmp++ ) {
|
|
if ( ( cmpnfo[cmp].sfv == 0 ) ||
|
|
( cmpnfo[cmp].sfh == 0 ) ||
|
|
( cmpnfo[cmp].qtable == NULL ) ||
|
|
( cmpnfo[cmp].qtable[0] == 0 ) ||
|
|
( jpegtype == 0 ) ) {
|
|
sprintf( errormessage, "header information is incomplete" );
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
}
|
|
|
|
// do all remaining component info calculations
|
|
for ( cmp = 0; cmp < cmpc; cmp++ ) {
|
|
if ( cmpnfo[ cmp ].sfh > sfhm ) sfhm = cmpnfo[ cmp ].sfh;
|
|
if ( cmpnfo[ cmp ].sfv > sfvm ) sfvm = cmpnfo[ cmp ].sfv;
|
|
}
|
|
mcuv = ( int ) ceil( (float) imgheight / (float) ( 8 * sfhm ) );
|
|
mcuh = ( int ) ceil( (float) imgwidth / (float) ( 8 * sfvm ) );
|
|
mcuc = mcuv * mcuh;
|
|
for ( cmp = 0; cmp < cmpc; cmp++ ) {
|
|
cmpnfo[ cmp ].mbs = cmpnfo[ cmp ].sfv * cmpnfo[ cmp ].sfh;
|
|
cmpnfo[ cmp ].bcv = mcuv * cmpnfo[ cmp ].sfh;
|
|
cmpnfo[ cmp ].bch = mcuh * cmpnfo[ cmp ].sfv;
|
|
cmpnfo[ cmp ].bc = cmpnfo[ cmp ].bcv * cmpnfo[ cmp ].bch;
|
|
cmpnfo[ cmp ].ncv = ( int ) ceil( (float) imgheight *
|
|
( (float) cmpnfo[ cmp ].sfh / ( 8.0 * sfhm ) ) );
|
|
cmpnfo[ cmp ].nch = ( int ) ceil( (float) imgwidth *
|
|
( (float) cmpnfo[ cmp ].sfv / ( 8.0 * sfvm ) ) );
|
|
cmpnfo[ cmp ].nc = cmpnfo[ cmp ].ncv * cmpnfo[ cmp ].nch;
|
|
}
|
|
|
|
// decide components' statistical ids
|
|
if ( cmpc <= 3 ) {
|
|
for ( cmp = 0; cmp < cmpc; cmp++ ) cmpnfo[ cmp ].sid = cmp;
|
|
}
|
|
else {
|
|
for ( cmp = 0; cmp < cmpc; cmp++ ) cmpnfo[ cmp ].sid = 0;
|
|
}
|
|
|
|
// alloc memory for further operations
|
|
for ( cmp = 0; cmp < cmpc; cmp++ )
|
|
{
|
|
// alloc memory for colls
|
|
for ( bpos = 0; bpos < 64; bpos++ ) {
|
|
colldata[cmp][bpos] = (short int*) calloc ( cmpnfo[cmp].bc, sizeof( short ) );
|
|
if (colldata[cmp][bpos] == NULL) {
|
|
sprintf( errormessage, MEM_ERRMSG );
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
}
|
|
|
|
// alloc memory for zdstlist / eob x / eob y
|
|
zdstdata[cmp] = (unsigned char*) calloc( cmpnfo[cmp].bc, sizeof( char ) );
|
|
eobxhigh[cmp] = (unsigned char*) calloc( cmpnfo[cmp].bc, sizeof( char ) );
|
|
eobyhigh[cmp] = (unsigned char*) calloc( cmpnfo[cmp].bc, sizeof( char ) );
|
|
zdstxlow[cmp] = (unsigned char*) calloc( cmpnfo[cmp].bc, sizeof( char ) );
|
|
zdstylow[cmp] = (unsigned char*) calloc( cmpnfo[cmp].bc, sizeof( char ) );
|
|
if ( ( zdstdata[cmp] == NULL ) ||
|
|
( eobxhigh[cmp] == NULL ) || ( eobyhigh[cmp] == NULL ) ||
|
|
( zdstxlow[cmp] == NULL ) || ( zdstylow[cmp] == NULL ) ) {
|
|
sprintf( errormessage, MEM_ERRMSG );
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
}
|
|
|
|
// also decide automatic settings here
|
|
if ( auto_set ) {
|
|
for ( cmp = 0; cmp < cmpc; cmp++ ) {
|
|
for ( i = 0;
|
|
conf_sets[ i ][ cmpnfo[cmp].sid ] > (unsigned int) cmpnfo[ cmp ].bc;
|
|
i++ );
|
|
segm_cnt[ cmp ] = conf_segm[ i ][ cmpnfo[cmp].sid ];
|
|
nois_trs[ cmp ] = conf_ntrs[ i ][ cmpnfo[cmp].sid ];
|
|
}
|
|
}
|
|
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
Parse routines for JFIF segments
|
|
----------------------------------------------- */
|
|
INTERN bool jpg_parse_jfif( unsigned char type, unsigned int len, unsigned char* segment )
|
|
{
|
|
unsigned int hpos = 4; // current position in segment, start after segment header
|
|
int lval, rval; // temporary variables
|
|
int skip;
|
|
int cmp;
|
|
int i;
|
|
|
|
|
|
switch ( type )
|
|
{
|
|
case 0xC4: // DHT segment
|
|
// build huffman trees & codes
|
|
while ( hpos < len ) {
|
|
lval = LBITS( segment[ hpos ], 4 );
|
|
rval = RBITS( segment[ hpos ], 4 );
|
|
if ( ((lval < 0) || (lval >= 2)) || ((rval < 0) || (rval >= 4)) )
|
|
break;
|
|
|
|
hpos++;
|
|
// build huffman codes & trees
|
|
jpg_build_huffcodes( &(segment[ hpos + 0 ]), &(segment[ hpos + 16 ]),
|
|
&(hcodes[ lval ][ rval ]), &(htrees[ lval ][ rval ]) );
|
|
htset[ lval ][ rval ] = 1;
|
|
|
|
skip = 16;
|
|
for ( i = 0; i < 16; i++ )
|
|
skip += ( int ) segment[ hpos + i ];
|
|
hpos += skip;
|
|
}
|
|
|
|
if ( hpos != len ) {
|
|
// if we get here, something went wrong
|
|
sprintf( errormessage, "size mismatch in dht marker" );
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
return true;
|
|
|
|
case 0xDB: // DQT segment
|
|
// copy quantization tables to internal memory
|
|
while ( hpos < len ) {
|
|
lval = LBITS( segment[ hpos ], 4 );
|
|
rval = RBITS( segment[ hpos ], 4 );
|
|
if ( (lval < 0) || (lval >= 2) ) break;
|
|
if ( (rval < 0) || (rval >= 4) ) break;
|
|
hpos++;
|
|
if ( lval == 0 ) { // 8 bit precision
|
|
for ( i = 0; i < 64; i++ ) {
|
|
qtables[ rval ][ i ] = ( unsigned short ) segment[ hpos + i ];
|
|
if ( qtables[ rval ][ i ] == 0 ) break;
|
|
}
|
|
hpos += 64;
|
|
}
|
|
else { // 16 bit precision
|
|
for ( i = 0; i < 64; i++ ) {
|
|
qtables[ rval ][ i ] =
|
|
B_SHORT( segment[ hpos + (2*i) ], segment[ hpos + (2*i) + 1 ] );
|
|
if ( qtables[ rval ][ i ] == 0 ) break;
|
|
}
|
|
hpos += 128;
|
|
}
|
|
}
|
|
|
|
if ( hpos != len ) {
|
|
// if we get here, something went wrong
|
|
sprintf( errormessage, "size mismatch in dqt marker" );
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
return true;
|
|
|
|
case 0xDD: // DRI segment
|
|
// define restart interval
|
|
rsti = B_SHORT( segment[ hpos ], segment[ hpos + 1 ] );
|
|
return true;
|
|
|
|
case 0xDA: // SOS segment
|
|
// prepare next scan
|
|
cs_cmpc = segment[ hpos ];
|
|
if ( cs_cmpc > cmpc ) {
|
|
sprintf( errormessage, "%i components in scan, only %i are allowed",
|
|
cs_cmpc, cmpc );
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
hpos++;
|
|
for ( i = 0; i < cs_cmpc; i++ ) {
|
|
for ( cmp = 0; ( segment[ hpos ] != cmpnfo[ cmp ].jid ) && ( cmp < cmpc ); cmp++ );
|
|
if ( cmp == cmpc ) {
|
|
sprintf( errormessage, "component id mismatch in start-of-scan" );
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
cs_cmp[ i ] = cmp;
|
|
cmpnfo[ cmp ].huffdc = LBITS( segment[ hpos + 1 ], 4 );
|
|
cmpnfo[ cmp ].huffac = RBITS( segment[ hpos + 1 ], 4 );
|
|
if ( ( cmpnfo[ cmp ].huffdc < 0 ) || ( cmpnfo[ cmp ].huffdc >= 4 ) ||
|
|
( cmpnfo[ cmp ].huffac < 0 ) || ( cmpnfo[ cmp ].huffac >= 4 ) ) {
|
|
sprintf( errormessage, "huffman table number mismatch" );
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
hpos += 2;
|
|
}
|
|
cs_from = segment[ hpos + 0 ];
|
|
cs_to = segment[ hpos + 1 ];
|
|
cs_sah = LBITS( segment[ hpos + 2 ], 4 );
|
|
cs_sal = RBITS( segment[ hpos + 2 ], 4 );
|
|
// check for errors
|
|
if ( ( cs_from > cs_to ) || ( cs_from > 63 ) || ( cs_to > 63 ) ) {
|
|
sprintf( errormessage, "spectral selection parameter out of range" );
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
if ( ( cs_sah >= 12 ) || ( cs_sal >= 12 ) ) {
|
|
sprintf( errormessage, "successive approximation parameter out of range" );
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
return true;
|
|
|
|
case 0xC0: // SOF0 segment
|
|
// coding process: baseline DCT
|
|
|
|
case 0xC1: // SOF1 segment
|
|
// coding process: extended sequential DCT
|
|
|
|
case 0xC2: // SOF2 segment
|
|
// coding process: progressive DCT
|
|
|
|
// set JPEG coding type
|
|
if ( type == 0xC2 )
|
|
jpegtype = 2;
|
|
else
|
|
jpegtype = 1;
|
|
|
|
// check data precision, only 8 bit is allowed
|
|
lval = segment[ hpos ];
|
|
if ( lval != 8 ) {
|
|
sprintf( errormessage, "%i bit data precision is not supported", lval );
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
|
|
// image size, height & component count
|
|
imgheight = B_SHORT( segment[ hpos + 1 ], segment[ hpos + 2 ] );
|
|
imgwidth = B_SHORT( segment[ hpos + 3 ], segment[ hpos + 4 ] );
|
|
cmpc = segment[ hpos + 5 ];
|
|
if ( cmpc > 4 ) {
|
|
sprintf( errormessage, "image has %i components, max 4 are supported", cmpc );
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
|
|
hpos += 6;
|
|
// components contained in image
|
|
for ( cmp = 0; cmp < cmpc; cmp++ ) {
|
|
cmpnfo[ cmp ].jid = segment[ hpos ];
|
|
cmpnfo[ cmp ].sfv = LBITS( segment[ hpos + 1 ], 4 );
|
|
cmpnfo[ cmp ].sfh = RBITS( segment[ hpos + 1 ], 4 );
|
|
cmpnfo[ cmp ].qtable = qtables[ segment[ hpos + 2 ] ];
|
|
hpos += 3;
|
|
}
|
|
|
|
return true;
|
|
|
|
case 0xC3: // SOF3 segment
|
|
// coding process: lossless sequential
|
|
sprintf( errormessage, "sof3 marker found, image is coded lossless" );
|
|
errorlevel = 2;
|
|
return false;
|
|
|
|
case 0xC5: // SOF5 segment
|
|
// coding process: differential sequential DCT
|
|
sprintf( errormessage, "sof5 marker found, image is coded diff. sequential" );
|
|
errorlevel = 2;
|
|
return false;
|
|
|
|
case 0xC6: // SOF6 segment
|
|
// coding process: differential progressive DCT
|
|
sprintf( errormessage, "sof6 marker found, image is coded diff. progressive" );
|
|
errorlevel = 2;
|
|
return false;
|
|
|
|
case 0xC7: // SOF7 segment
|
|
// coding process: differential lossless
|
|
sprintf( errormessage, "sof7 marker found, image is coded diff. lossless" );
|
|
errorlevel = 2;
|
|
return false;
|
|
|
|
case 0xC9: // SOF9 segment
|
|
// coding process: arithmetic extended sequential DCT
|
|
sprintf( errormessage, "sof9 marker found, image is coded arithm. sequential" );
|
|
errorlevel = 2;
|
|
return false;
|
|
|
|
case 0xCA: // SOF10 segment
|
|
// coding process: arithmetic extended sequential DCT
|
|
sprintf( errormessage, "sof10 marker found, image is coded arithm. progressive" );
|
|
errorlevel = 2;
|
|
return false;
|
|
|
|
case 0xCB: // SOF11 segment
|
|
// coding process: arithmetic extended sequential DCT
|
|
sprintf( errormessage, "sof11 marker found, image is coded arithm. lossless" );
|
|
errorlevel = 2;
|
|
return false;
|
|
|
|
case 0xCD: // SOF13 segment
|
|
// coding process: arithmetic differntial sequential DCT
|
|
sprintf( errormessage, "sof13 marker found, image is coded arithm. diff. sequential" );
|
|
errorlevel = 2;
|
|
return false;
|
|
|
|
case 0xCE: // SOF14 segment
|
|
// coding process: arithmetic differential progressive DCT
|
|
sprintf( errormessage, "sof14 marker found, image is coded arithm. diff. progressive" );
|
|
errorlevel = 2;
|
|
return false;
|
|
|
|
case 0xCF: // SOF15 segment
|
|
// coding process: arithmetic differntial lossless
|
|
sprintf( errormessage, "sof15 marker found, image is coded arithm. diff. lossless" );
|
|
errorlevel = 2;
|
|
return false;
|
|
|
|
case 0xE0: // APP0 segment
|
|
case 0xE1: // APP1 segment
|
|
case 0xE2: // APP2 segment
|
|
case 0xE3: // APP3 segment
|
|
case 0xE4: // APP4 segment
|
|
case 0xE5: // APP5 segment
|
|
case 0xE6: // APP6 segment
|
|
case 0xE7: // APP7 segment
|
|
case 0xE8: // APP8 segment
|
|
case 0xE9: // APP9 segment
|
|
case 0xEA: // APP10 segment
|
|
case 0xEB: // APP11 segment
|
|
case 0xEC: // APP12segment
|
|
case 0xED: // APP13 segment
|
|
case 0xEE: // APP14 segment
|
|
case 0xEF: // APP15 segment
|
|
case 0xFE: // COM segment
|
|
// do nothing - return true
|
|
return true;
|
|
|
|
case 0xD0: // RST0 segment
|
|
case 0xD1: // RST1segment
|
|
case 0xD2: // RST2 segment
|
|
case 0xD3: // RST3 segment
|
|
case 0xD4: // RST4 segment
|
|
case 0xD5: // RST5 segment
|
|
case 0xD6: // RST6 segment
|
|
case 0xD7: // RST7 segment
|
|
// return errormessage - RST is out of place here
|
|
sprintf( errormessage, "rst marker found out of place" );
|
|
errorlevel = 2;
|
|
return false;
|
|
|
|
case 0xD8: // SOI segment
|
|
// return errormessage - start-of-image is out of place here
|
|
sprintf( errormessage, "soi marker found out of place" );
|
|
errorlevel = 2;
|
|
return false;
|
|
|
|
case 0xD9: // EOI segment
|
|
// return errormessage - end-of-image is out of place here
|
|
sprintf( errormessage, "eoi marker found out of place" );
|
|
errorlevel = 2;
|
|
return false;
|
|
|
|
default: // unknown marker segment
|
|
// return warning
|
|
sprintf( errormessage, "unknown marker found: FF %2X", type );
|
|
errorlevel = 1;
|
|
return true;
|
|
}
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
JFIF header rebuilding routine
|
|
----------------------------------------------- */
|
|
INTERN bool jpg_rebuild_header( void )
|
|
{
|
|
abytewriter* hdrw; // new header writer
|
|
|
|
unsigned char type = 0x00; // type of current marker segment
|
|
unsigned int len = 0; // length of current marker segment
|
|
unsigned int hpos = 0; // position in header
|
|
|
|
|
|
// start headerwriter
|
|
hdrw = new abytewriter( 4096 );
|
|
|
|
// header parser loop
|
|
while ( ( int ) hpos < hdrs ) {
|
|
type = hdrdata[ hpos + 1 ];
|
|
len = 2 + B_SHORT( hdrdata[ hpos + 2 ], hdrdata[ hpos + 3 ] );
|
|
// discard any unneeded meta info
|
|
if ( ( type == 0xDA ) || ( type == 0xC4 ) || ( type == 0xDB ) ||
|
|
( type == 0xC0 ) || ( type == 0xC1 ) || ( type == 0xC2 ) ||
|
|
( type == 0xDD ) ) {
|
|
hdrw->write_n( &(hdrdata[ hpos ]), len );
|
|
}
|
|
hpos += len;
|
|
}
|
|
|
|
// replace current header with the new one
|
|
free( hdrdata );
|
|
hdrdata = hdrw->getptr();
|
|
hdrs = hdrw->getpos();
|
|
delete( hdrw );
|
|
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
sequential block decoding routine
|
|
----------------------------------------------- */
|
|
INTERN int jpg_decode_block_seq( abitreader* huffr, huffTree* dctree, huffTree* actree, short* block )
|
|
{
|
|
unsigned short n;
|
|
unsigned char s;
|
|
unsigned char z;
|
|
int eob = 64;
|
|
int bpos;
|
|
int hc;
|
|
|
|
|
|
// decode dc
|
|
hc = jpg_next_huffcode( huffr, dctree );
|
|
if ( hc < 0 ) return -1; // return error
|
|
else s = ( unsigned char ) hc;
|
|
n = huffr->read( s );
|
|
block[ 0 ] = DEVLI( s, n );
|
|
|
|
// decode ac
|
|
for ( bpos = 1; bpos < 64; )
|
|
{
|
|
// decode next
|
|
hc = jpg_next_huffcode( huffr, actree );
|
|
// analyse code
|
|
if ( hc > 0 ) {
|
|
z = LBITS( hc, 4 );
|
|
s = RBITS( hc, 4 );
|
|
n = huffr->read( s );
|
|
if ( ( z + bpos ) >= 64 )
|
|
return -1; // run is to long
|
|
while ( z > 0 ) { // write zeroes
|
|
block[ bpos++ ] = 0;
|
|
z--;
|
|
}
|
|
block[ bpos++ ] = ( short ) DEVLI( s, n ); // decode cvli
|
|
}
|
|
else if ( hc == 0 ) { // EOB
|
|
eob = bpos;
|
|
// while( bpos < 64 ) // fill remaining block with zeroes
|
|
// block[ bpos++ ] = 0;
|
|
break;
|
|
}
|
|
else {
|
|
return -1; // return error
|
|
}
|
|
}
|
|
|
|
|
|
// return position of eob
|
|
return eob;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
sequential block encoding routine
|
|
----------------------------------------------- */
|
|
INTERN int jpg_encode_block_seq( abitwriter* huffw, huffCodes* dctbl, huffCodes* actbl, short* block )
|
|
{
|
|
unsigned short n;
|
|
unsigned char s;
|
|
unsigned char z;
|
|
int bpos;
|
|
int hc;
|
|
|
|
|
|
// encode DC
|
|
s = BITLEN2048N( block[ 0 ] );
|
|
n = ENVLI( s, block[ 0 ] );
|
|
huffw->write( dctbl->cval[ s ], dctbl->clen[ s ] );
|
|
huffw->write( n, s );
|
|
|
|
// encode AC
|
|
z = 0;
|
|
for ( bpos = 1; bpos < 64; bpos++ )
|
|
{
|
|
// if nonzero is encountered
|
|
if ( block[ bpos ] != 0 ) {
|
|
// write remaining zeroes
|
|
while ( z >= 16 ) {
|
|
huffw->write( actbl->cval[ 0xF0 ], actbl->clen[ 0xF0 ] );
|
|
z -= 16;
|
|
}
|
|
// vli encode
|
|
s = BITLEN2048N( block[ bpos ] );
|
|
n = ENVLI( s, block[ bpos ] );
|
|
hc = ( ( z << 4 ) + s );
|
|
// write to huffman writer
|
|
huffw->write( actbl->cval[ hc ], actbl->clen[ hc ] );
|
|
huffw->write( n, s );
|
|
// reset zeroes
|
|
z = 0;
|
|
}
|
|
else { // increment zero counter
|
|
z++;
|
|
}
|
|
}
|
|
// write eob if needed
|
|
if ( z > 0 )
|
|
huffw->write( actbl->cval[ 0x00 ], actbl->clen[ 0x00 ] );
|
|
|
|
|
|
return 64 - z;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
progressive DC decoding routine
|
|
----------------------------------------------- */
|
|
INTERN int jpg_decode_dc_prg_fs( abitreader* huffr, huffTree* dctree, short* block )
|
|
{
|
|
unsigned short n;
|
|
unsigned char s;
|
|
int hc;
|
|
|
|
|
|
// decode dc
|
|
hc = jpg_next_huffcode( huffr, dctree );
|
|
if ( hc < 0 ) return -1; // return error
|
|
else s = ( unsigned char ) hc;
|
|
n = huffr->read( s );
|
|
block[ 0 ] = DEVLI( s, n );
|
|
|
|
|
|
// return 0 if everything is ok
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
progressive DC encoding routine
|
|
----------------------------------------------- */
|
|
INTERN int jpg_encode_dc_prg_fs( abitwriter* huffw, huffCodes* dctbl, short* block )
|
|
{
|
|
unsigned short n;
|
|
unsigned char s;
|
|
|
|
|
|
// encode DC
|
|
s = BITLEN2048N( block[ 0 ] );
|
|
n = ENVLI( s, block[ 0 ] );
|
|
huffw->write( dctbl->cval[ s ], dctbl->clen[ s ] );
|
|
huffw->write( n, s );
|
|
|
|
|
|
// return 0 if everything is ok
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
progressive AC decoding routine
|
|
----------------------------------------------- */
|
|
INTERN int jpg_decode_ac_prg_fs( abitreader* huffr, huffTree* actree, short* block, int* eobrun, int from, int to )
|
|
{
|
|
unsigned short n;
|
|
unsigned char s;
|
|
unsigned char z;
|
|
int eob = to + 1;
|
|
int bpos;
|
|
int hc;
|
|
int l;
|
|
int r;
|
|
|
|
|
|
// decode ac
|
|
for ( bpos = from; bpos <= to; )
|
|
{
|
|
// decode next
|
|
hc = jpg_next_huffcode( huffr, actree );
|
|
if ( hc < 0 ) return -1;
|
|
l = LBITS( hc, 4 );
|
|
r = RBITS( hc, 4 );
|
|
// analyse code
|
|
if ( ( l == 15 ) || ( r > 0 ) ) { // decode run/level combination
|
|
z = l;
|
|
s = r;
|
|
n = huffr->read( s );
|
|
if ( ( z + bpos ) > to )
|
|
return -1; // run is to long
|
|
while ( z > 0 ) { // write zeroes
|
|
block[ bpos++ ] = 0;
|
|
z--;
|
|
}
|
|
block[ bpos++ ] = ( short ) DEVLI( s, n ); // decode cvli
|
|
}
|
|
else { // decode eobrun
|
|
eob = bpos;
|
|
s = l;
|
|
n = huffr->read( s );
|
|
(*eobrun) = E_DEVLI( s, n );
|
|
// while( bpos <= to ) // fill remaining block with zeroes
|
|
// block[ bpos++ ] = 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
// return position of eob
|
|
return eob;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
progressive AC encoding routine
|
|
----------------------------------------------- */
|
|
INTERN int jpg_encode_ac_prg_fs( abitwriter* huffw, huffCodes* actbl, short* block, int* eobrun, int from, int to )
|
|
{
|
|
unsigned short n;
|
|
unsigned char s;
|
|
unsigned char z;
|
|
int bpos;
|
|
int hc;
|
|
|
|
// encode AC
|
|
z = 0;
|
|
for ( bpos = from; bpos <= to; bpos++ )
|
|
{
|
|
// if nonzero is encountered
|
|
if ( block[ bpos ] != 0 ) {
|
|
// encode eobrun
|
|
jpg_encode_eobrun( huffw, actbl, eobrun );
|
|
// write remaining zeroes
|
|
while ( z >= 16 ) {
|
|
huffw->write( actbl->cval[ 0xF0 ], actbl->clen[ 0xF0 ] );
|
|
z -= 16;
|
|
}
|
|
// vli encode
|
|
s = BITLEN2048N( block[ bpos ] );
|
|
n = ENVLI( s, block[ bpos ] );
|
|
hc = ( ( z << 4 ) + s );
|
|
// write to huffman writer
|
|
huffw->write( actbl->cval[ hc ], actbl->clen[ hc ] );
|
|
huffw->write( n, s );
|
|
// reset zeroes
|
|
z = 0;
|
|
}
|
|
else { // increment zero counter
|
|
z++;
|
|
}
|
|
}
|
|
|
|
// check eob, increment eobrun if needed
|
|
if ( z > 0 ) {
|
|
(*eobrun)++;
|
|
// check eobrun, encode if needed
|
|
if ( (*eobrun) == actbl->max_eobrun )
|
|
jpg_encode_eobrun( huffw, actbl, eobrun );
|
|
return 1 + to - z;
|
|
}
|
|
else {
|
|
return 1 + to;
|
|
}
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
progressive DC SA decoding routine
|
|
----------------------------------------------- */
|
|
INTERN int jpg_decode_dc_prg_sa( abitreader* huffr, short* block )
|
|
{
|
|
// decode next bit of dc coefficient
|
|
block[ 0 ] = huffr->read( 1 );
|
|
|
|
// return 0 if everything is ok
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
progressive DC SA encoding routine
|
|
----------------------------------------------- */
|
|
INTERN int jpg_encode_dc_prg_sa( abitwriter* huffw, short* block )
|
|
{
|
|
// enocode next bit of dc coefficient
|
|
huffw->write( block[ 0 ], 1 );
|
|
|
|
// return 0 if everything is ok
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
progressive AC SA decoding routine
|
|
----------------------------------------------- */
|
|
INTERN int jpg_decode_ac_prg_sa( abitreader* huffr, huffTree* actree, short* block, int* eobrun, int from, int to )
|
|
{
|
|
unsigned short n;
|
|
unsigned char s;
|
|
signed char z;
|
|
signed char v;
|
|
int bpos = from;
|
|
int eob = to;
|
|
int hc;
|
|
int l;
|
|
int r;
|
|
|
|
|
|
// decode AC succesive approximation bits
|
|
if ( (*eobrun) == 0 ) while ( bpos <= to )
|
|
{
|
|
// decode next
|
|
hc = jpg_next_huffcode( huffr, actree );
|
|
if ( hc < 0 ) return -1;
|
|
l = LBITS( hc, 4 );
|
|
r = RBITS( hc, 4 );
|
|
// analyse code
|
|
if ( ( l == 15 ) || ( r > 0 ) ) { // decode run/level combination
|
|
z = l;
|
|
s = r;
|
|
if ( s == 0 ) v = 0;
|
|
else if ( s == 1 ) {
|
|
n = huffr->read( 1 );
|
|
v = ( n == 0 ) ? -1 : 1; // fast decode vli
|
|
}
|
|
else return -1; // decoding error
|
|
// write zeroes / write correction bits
|
|
while ( true ) {
|
|
if ( block[ bpos ] == 0 ) { // skip zeroes / write value
|
|
if ( z > 0 ) z--;
|
|
else {
|
|
block[ bpos++ ] = v;
|
|
break;
|
|
}
|
|
}
|
|
else { // read correction bit
|
|
n = huffr->read( 1 );
|
|
block[ bpos ] = ( block[ bpos ] > 0 ) ? n : -n;
|
|
}
|
|
if ( bpos++ >= to ) return -1; // error check
|
|
}
|
|
}
|
|
else { // decode eobrun
|
|
eob = bpos;
|
|
s = l;
|
|
n = huffr->read( s );
|
|
(*eobrun) = E_DEVLI( s, n );
|
|
break;
|
|
}
|
|
}
|
|
|
|
// read after eob correction bits
|
|
if ( (*eobrun) > 0 ) {
|
|
for ( ; bpos <= to; bpos++ ) {
|
|
if ( block[ bpos ] != 0 ) {
|
|
n = huffr->read( 1 );
|
|
block[ bpos ] = ( block[ bpos ] > 0 ) ? n : -n;
|
|
}
|
|
}
|
|
}
|
|
|
|
// return eob
|
|
return eob;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
progressive AC SA encoding routine
|
|
----------------------------------------------- */
|
|
INTERN int jpg_encode_ac_prg_sa( abitwriter* huffw, abytewriter* storw, huffCodes* actbl, short* block, int* eobrun, int from, int to )
|
|
{
|
|
unsigned short n;
|
|
unsigned char s;
|
|
unsigned char z;
|
|
int eob = from;
|
|
int bpos;
|
|
int hc;
|
|
|
|
// check if block contains any newly nonzero coefficients and find out position of eob
|
|
for ( bpos = to; bpos >= from; bpos-- ) {
|
|
if ( ( block[ bpos ] == 1 ) || ( block[ bpos ] == -1 ) ) {
|
|
eob = bpos + 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
// encode eobrun if needed
|
|
if ( ( eob > from ) && ( (*eobrun) > 0 ) ) {
|
|
jpg_encode_eobrun( huffw, actbl, eobrun );
|
|
jpg_encode_crbits( huffw, storw );
|
|
}
|
|
|
|
// encode AC
|
|
z = 0;
|
|
for ( bpos = from; bpos < eob; bpos++ )
|
|
{
|
|
// if zero is encountered
|
|
if ( block[ bpos ] == 0 ) {
|
|
z++; // increment zero counter
|
|
if ( z == 16 ) { // write zeroes if needed
|
|
huffw->write( actbl->cval[ 0xF0 ], actbl->clen[ 0xF0 ] );
|
|
jpg_encode_crbits( huffw, storw );
|
|
z = 0;
|
|
}
|
|
}
|
|
// if nonzero is encountered
|
|
else if ( ( block[ bpos ] == 1 ) || ( block[ bpos ] == -1 ) ) {
|
|
// vli encode
|
|
s = BITLEN2048N( block[ bpos ] );
|
|
n = ENVLI( s, block[ bpos ] );
|
|
hc = ( ( z << 4 ) + s );
|
|
// write to huffman writer
|
|
huffw->write( actbl->cval[ hc ], actbl->clen[ hc ] );
|
|
huffw->write( n, s );
|
|
// write correction bits
|
|
jpg_encode_crbits( huffw, storw );
|
|
// reset zeroes
|
|
z = 0;
|
|
}
|
|
else { // store correction bits
|
|
n = block[ bpos ] & 0x1;
|
|
storw->write( n );
|
|
}
|
|
}
|
|
|
|
// fast processing after eob
|
|
for ( ;bpos <= to; bpos++ )
|
|
{
|
|
if ( block[ bpos ] != 0 ) { // store correction bits
|
|
n = block[ bpos ] & 0x1;
|
|
storw->write( n );
|
|
}
|
|
}
|
|
|
|
// check eob, increment eobrun if needed
|
|
if ( eob <= to ) {
|
|
(*eobrun)++;
|
|
// check eobrun, encode if needed
|
|
if ( (*eobrun) == actbl->max_eobrun ) {
|
|
jpg_encode_eobrun( huffw, actbl, eobrun );
|
|
jpg_encode_crbits( huffw, storw );
|
|
}
|
|
}
|
|
|
|
// return eob
|
|
return eob;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
run of EOB SA decoding routine
|
|
----------------------------------------------- */
|
|
INTERN int jpg_decode_eobrun_sa( abitreader* huffr, short* block, int* eobrun, int from, int to )
|
|
{
|
|
unsigned short n;
|
|
int bpos;
|
|
|
|
|
|
// fast eobrun decoding routine for succesive approximation
|
|
for ( bpos = from; bpos <= to; bpos++ ) {
|
|
if ( block[ bpos ] != 0 ) {
|
|
n = huffr->read( 1 );
|
|
block[ bpos ] = ( block[ bpos ] > 0 ) ? n : -n;
|
|
}
|
|
}
|
|
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
run of EOB encoding routine
|
|
----------------------------------------------- */
|
|
INTERN int jpg_encode_eobrun( abitwriter* huffw, huffCodes* actbl, int* eobrun )
|
|
{
|
|
unsigned short n;
|
|
unsigned char s;
|
|
int hc;
|
|
|
|
|
|
if ( (*eobrun) > 0 ) {
|
|
while ( (*eobrun) > actbl->max_eobrun ) {
|
|
huffw->write( actbl->cval[ 0xE0 ], actbl->clen[ 0xE0 ] );
|
|
huffw->write( E_ENVLI( 14, 32767 ), 14 );
|
|
(*eobrun) -= actbl->max_eobrun;
|
|
}
|
|
BITLEN( s, (*eobrun) );
|
|
s--;
|
|
n = E_ENVLI( s, (*eobrun) );
|
|
hc = ( s << 4 );
|
|
huffw->write( actbl->cval[ hc ], actbl->clen[ hc ] );
|
|
huffw->write( n, s );
|
|
(*eobrun) = 0;
|
|
}
|
|
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
correction bits encoding routine
|
|
----------------------------------------------- */
|
|
INTERN int jpg_encode_crbits( abitwriter* huffw, abytewriter* storw )
|
|
{
|
|
unsigned char* data;
|
|
int len;
|
|
int i;
|
|
|
|
|
|
// peek into data from abytewriter
|
|
len = storw->getpos();
|
|
if ( len == 0 ) return 0;
|
|
data = storw->peekptr();
|
|
|
|
// write bits to huffwriter
|
|
for ( i = 0; i < len; i++ )
|
|
huffw->write( data[ i ], 1 );
|
|
|
|
// reset abytewriter, discard data
|
|
storw->reset();
|
|
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
returns next code (from huffman-tree & -data)
|
|
----------------------------------------------- */
|
|
INTERN int jpg_next_huffcode( abitreader *huffw, huffTree *ctree )
|
|
{
|
|
int node = 0;
|
|
|
|
|
|
while ( node < 256 ) {
|
|
node = ( huffw->read( 1 ) == 1 ) ?
|
|
ctree->r[ node ] : ctree->l[ node ];
|
|
if ( node == 0 ) break;
|
|
}
|
|
|
|
return ( node - 256 );
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
calculates next position for MCU
|
|
----------------------------------------------- */
|
|
INTERN int jpg_next_mcupos( int* mcu, int* cmp, int* csc, int* sub, int* dpos, int* rstw )
|
|
{
|
|
int sta = 0; // status
|
|
|
|
|
|
// increment all counts where needed
|
|
if ( ( ++(*sub) ) >= cmpnfo[(*cmp)].mbs ) {
|
|
(*sub) = 0;
|
|
|
|
if ( ( ++(*csc) ) >= cs_cmpc ) {
|
|
(*csc) = 0;
|
|
(*cmp) = cs_cmp[ 0 ];
|
|
(*mcu)++;
|
|
if ( (*mcu) >= mcuc ) sta = 2;
|
|
else if ( rsti > 0 )
|
|
if ( --(*rstw) == 0 ) sta = 1;
|
|
}
|
|
else {
|
|
(*cmp) = cs_cmp[(*csc)];
|
|
}
|
|
}
|
|
|
|
// get correct position in image ( x & y )
|
|
if ( cmpnfo[(*cmp)].sfh > 1 ) { // to fix mcu order
|
|
(*dpos) = ( (*mcu) / mcuh ) * cmpnfo[(*cmp)].sfh + ( (*sub) / cmpnfo[(*cmp)].sfv );
|
|
(*dpos) *= cmpnfo[(*cmp)].bch;
|
|
(*dpos) += ( (*mcu) % mcuh ) * cmpnfo[(*cmp)].sfv + ( (*sub) % cmpnfo[(*cmp)].sfv );
|
|
}
|
|
else if ( cmpnfo[(*cmp)].sfv > 1 ) {
|
|
// simple calculation to speed up things if simple fixing is enough
|
|
(*dpos) = ( (*mcu) * cmpnfo[(*cmp)].mbs ) + (*sub);
|
|
}
|
|
else {
|
|
// no calculations needed without subsampling
|
|
(*dpos) = (*mcu);
|
|
}
|
|
|
|
|
|
return sta;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
calculates next position (non interleaved)
|
|
----------------------------------------------- */
|
|
INTERN int jpg_next_mcuposn( int* cmp, int* dpos, int* rstw )
|
|
{
|
|
// increment position
|
|
(*dpos)++;
|
|
|
|
// fix for non interleaved mcu - horizontal
|
|
if ( cmpnfo[(*cmp)].bch != cmpnfo[(*cmp)].nch ) {
|
|
if ( (*dpos) % cmpnfo[(*cmp)].bch == cmpnfo[(*cmp)].nch )
|
|
(*dpos) += ( cmpnfo[(*cmp)].bch - cmpnfo[(*cmp)].nch );
|
|
}
|
|
|
|
// fix for non interleaved mcu - vertical
|
|
if ( cmpnfo[(*cmp)].bcv != cmpnfo[(*cmp)].ncv ) {
|
|
if ( (*dpos) / cmpnfo[(*cmp)].bch == cmpnfo[(*cmp)].ncv )
|
|
(*dpos) = cmpnfo[(*cmp)].bc;
|
|
}
|
|
|
|
// check position
|
|
if ( (*dpos) >= cmpnfo[(*cmp)].bc ) return 2;
|
|
else if ( rsti > 0 )
|
|
if ( --(*rstw) == 0 ) return 1;
|
|
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
skips the eobrun, calculates next position
|
|
----------------------------------------------- */
|
|
INTERN int jpg_skip_eobrun( int* cmp, int* dpos, int* rstw, int* eobrun )
|
|
{
|
|
if ( (*eobrun) > 0 ) // error check for eobrun
|
|
{
|
|
// compare rst wait counter if needed
|
|
if ( rsti > 0 ) {
|
|
if ( (*eobrun) > (*rstw) )
|
|
return -1;
|
|
else
|
|
(*rstw) -= (*eobrun);
|
|
}
|
|
|
|
// fix for non interleaved mcu - horizontal
|
|
if ( cmpnfo[(*cmp)].bch != cmpnfo[(*cmp)].nch ) {
|
|
(*dpos) += ( ( ( (*dpos) % cmpnfo[(*cmp)].bch ) + (*eobrun) ) /
|
|
cmpnfo[(*cmp)].nch ) * ( cmpnfo[(*cmp)].bch - cmpnfo[(*cmp)].nch );
|
|
}
|
|
|
|
// fix for non interleaved mcu - vertical
|
|
if ( cmpnfo[(*cmp)].bcv != cmpnfo[(*cmp)].ncv ) {
|
|
if ( (*dpos) / cmpnfo[(*cmp)].bch >= cmpnfo[(*cmp)].ncv )
|
|
(*dpos) += ( cmpnfo[(*cmp)].bcv - cmpnfo[(*cmp)].ncv ) *
|
|
cmpnfo[(*cmp)].bch;
|
|
}
|
|
|
|
// skip blocks
|
|
(*dpos) += (*eobrun);
|
|
|
|
// reset eobrun
|
|
(*eobrun) = 0;
|
|
|
|
// check position
|
|
if ( (*dpos) == cmpnfo[(*cmp)].bc ) return 2;
|
|
else if ( (*dpos) > cmpnfo[(*cmp)].bc ) return -1;
|
|
else if ( rsti > 0 )
|
|
if ( (*rstw) == 0 ) return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
creates huffman-codes & -trees from dht-data
|
|
----------------------------------------------- */
|
|
INTERN void jpg_build_huffcodes( unsigned char *clen, unsigned char *cval, huffCodes *hc, huffTree *ht )
|
|
{
|
|
int nextfree;
|
|
int code;
|
|
int node;
|
|
int i, j, k;
|
|
|
|
|
|
// fill with zeroes
|
|
memset( hc->clen, 0, 256 * sizeof( short ) );
|
|
memset( hc->cval, 0, 256 * sizeof( short ) );
|
|
memset( ht->l, 0, 256 * sizeof( short ) );
|
|
memset( ht->r, 0, 256 * sizeof( short ) );
|
|
|
|
// 1st part -> build huffman codes
|
|
|
|
// creating huffman-codes
|
|
k = 0;
|
|
code = 0;
|
|
|
|
// symbol-value of code is its position in the table
|
|
for( i = 0; i < 16; i++ ) {
|
|
for( j = 0; j < (int) clen[ i ]; j++ ) {
|
|
hc->clen[ (int) cval[k] ] = 1 + i;
|
|
hc->cval[ (int) cval[k] ] = code;
|
|
|
|
k++;
|
|
code++;
|
|
}
|
|
code = code << 1;
|
|
}
|
|
|
|
// find out eobrun max value
|
|
hc->max_eobrun = 0;
|
|
for ( i = 14; i >= 0; i-- ) {
|
|
if ( hc->clen[ i << 4 ] > 0 ) {
|
|
hc->max_eobrun = ( 2 << i ) - 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
// 2nd -> part use codes to build the coding tree
|
|
|
|
// initial value for next free place
|
|
nextfree = 1;
|
|
|
|
// work through every code creating links between the nodes (represented through ints)
|
|
for ( i = 0; i < 256; i++ ) {
|
|
// (re)set current node
|
|
node = 0;
|
|
// go through each code & store path
|
|
for ( j = hc->clen[ i ] - 1; j > 0; j-- ) {
|
|
if ( BITN( hc->cval[ i ], j ) == 1 ) {
|
|
if ( ht->r[ node ] == 0 )
|
|
ht->r[ node ] = nextfree++;
|
|
node = ht->r[ node ];
|
|
}
|
|
else{
|
|
if ( ht->l[ node ] == 0 )
|
|
ht->l[ node ] = nextfree++;
|
|
node = ht->l[ node ];
|
|
}
|
|
}
|
|
// last link is number of targetvalue + 256
|
|
if ( hc->clen[ i ] > 0 ) {
|
|
if ( BITN( hc->cval[ i ], 0 ) == 1 )
|
|
ht->r[ node ] = i + 256;
|
|
else
|
|
ht->l[ node ] = i + 256;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* ----------------------- End of JPEG specific functions -------------------------- */
|
|
|
|
/* ----------------------- End of PJG specific functions -------------------------- */
|
|
|
|
|
|
/* -----------------------------------------------
|
|
encodes frequency scanorder to pjg
|
|
----------------------------------------------- */
|
|
INTERN bool pjg_encode_zstscan( aricoder* enc, int cmp )
|
|
{
|
|
model_s* model;
|
|
|
|
unsigned char freqlist[ 64 ];
|
|
int tpos; // true position
|
|
int cpos; // coded position
|
|
int c, i;
|
|
|
|
|
|
// calculate zero sort scan
|
|
pjg_get_zerosort_scan( zsrtscan[cmp], cmp );
|
|
|
|
// preset freqlist
|
|
for ( i = 0; i < 64; i++ )
|
|
freqlist[ i ] = stdscan[ i ];
|
|
|
|
// init model
|
|
model = INIT_MODEL_S( 64, 64, 1 );
|
|
|
|
// encode scanorder
|
|
for ( i = 1; i < 64; i++ )
|
|
{
|
|
// reduce range of model
|
|
model->exclude_symbols( 'a', 64 - i );
|
|
|
|
// compare remaining list to remainnig scan
|
|
tpos = 0;
|
|
for ( c = i; c < 64; c++ ) {
|
|
// search next val != 0 in list
|
|
for ( tpos++; freqlist[ tpos ] == 0; tpos++ );
|
|
// get out if not a match
|
|
if ( freqlist[ tpos ] != zsrtscan[ cmp ][ c ] ) break;
|
|
}
|
|
if ( c == 64 ) {
|
|
// remaining list is in sorted scanorder
|
|
// encode zero and make a quick exit
|
|
encode_ari( enc, model, 0 );
|
|
break;
|
|
}
|
|
|
|
// list is not in sorted order -> next pos hat to be encoded
|
|
cpos = 1;
|
|
// encode position
|
|
for ( tpos = 0; freqlist[ tpos ] != zsrtscan[ cmp ][ i ]; tpos++ )
|
|
if ( freqlist[ tpos ] != 0 ) cpos++;
|
|
// remove from list
|
|
freqlist[ tpos ] = 0;
|
|
|
|
// encode coded position in list
|
|
encode_ari( enc, model, cpos );
|
|
model->shift_context( cpos );
|
|
}
|
|
|
|
// delete model
|
|
delete( model );
|
|
|
|
// set zero sort scan as freqscan
|
|
freqscan[ cmp ] = zsrtscan[ cmp ];
|
|
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
encodes # of non zeroes to pjg (high)
|
|
----------------------------------------------- */
|
|
INTERN bool pjg_encode_zdst_high( aricoder* enc, int cmp )
|
|
{
|
|
model_s* model;
|
|
|
|
unsigned char* zdstls;
|
|
int dpos;
|
|
int a, b;
|
|
int bc;
|
|
int w;
|
|
|
|
|
|
// init model, constants
|
|
model = INIT_MODEL_S( 49 + 1, 25 + 1, 1 );
|
|
zdstls = zdstdata[ cmp ];
|
|
w = cmpnfo[cmp].bch;
|
|
bc = cmpnfo[cmp].bc;
|
|
|
|
// arithmetic encode zero-distribution-list
|
|
for ( dpos = 0; dpos < bc; dpos++ ) {
|
|
// context modelling - use average of above and left as context
|
|
get_context_nnb( dpos, w, &a, &b );
|
|
a = ( a >= 0 ) ? zdstls[ a ] : 0;
|
|
b = ( b >= 0 ) ? zdstls[ b ] : 0;
|
|
// shift context
|
|
model->shift_context( ( a + b + 2 ) / 4 );
|
|
// encode symbol
|
|
encode_ari( enc, model, zdstls[ dpos ] );
|
|
}
|
|
|
|
// clean up
|
|
delete( model );
|
|
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
encodes # of non zeroes to pjg (low)
|
|
----------------------------------------------- */
|
|
INTERN bool pjg_encode_zdst_low( aricoder* enc, int cmp )
|
|
{
|
|
model_s* model;
|
|
|
|
unsigned char* zdstls_x;
|
|
unsigned char* zdstls_y;
|
|
unsigned char* ctx_zdst;
|
|
unsigned char* ctx_eobx;
|
|
unsigned char* ctx_eoby;
|
|
|
|
int dpos;
|
|
int bc;
|
|
|
|
|
|
// init model, constants
|
|
model = INIT_MODEL_S( 8, 8, 2 );
|
|
zdstls_x = zdstxlow[ cmp ];
|
|
zdstls_y = zdstylow[ cmp ];
|
|
ctx_eobx = eobxhigh[ cmp ];
|
|
ctx_eoby = eobyhigh[ cmp ];
|
|
ctx_zdst = zdstdata[ cmp ];
|
|
bc = cmpnfo[cmp].bc;
|
|
|
|
// arithmetic encode zero-distribution-list (first row)
|
|
for ( dpos = 0; dpos < bc; dpos++ ) {
|
|
model->shift_context( ( ctx_zdst[dpos] + 3 ) / 7 ); // shift context
|
|
model->shift_context( ctx_eobx[dpos] ); // shift context
|
|
encode_ari( enc, model, zdstls_x[ dpos ] ); // encode symbol
|
|
}
|
|
// arithmetic encode zero-distribution-list (first collumn)
|
|
for ( dpos = 0; dpos < bc; dpos++ ) {
|
|
model->shift_context( ( ctx_zdst[dpos] + 3 ) / 7 ); // shift context
|
|
model->shift_context( ctx_eoby[dpos] ); // shift context
|
|
encode_ari( enc, model, zdstls_y[ dpos ] ); // encode symbol
|
|
}
|
|
|
|
// clean up
|
|
delete( model );
|
|
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
encodes DC coefficients to pjg
|
|
----------------------------------------------- */
|
|
INTERN bool pjg_encode_dc( aricoder* enc, int cmp )
|
|
{
|
|
unsigned char* segm_tab;
|
|
|
|
model_s* mod_len;
|
|
model_b* mod_sgn;
|
|
model_b* mod_res;
|
|
|
|
unsigned char* zdstls; // pointer to zero distribution list
|
|
signed short* coeffs; // pointer to current coefficent data
|
|
|
|
unsigned short* absv_store; // absolute coefficients values storage
|
|
unsigned short* c_absc[ 6 ]; // quick access array for contexts
|
|
int c_weight[ 6 ]; // weighting for contexts
|
|
|
|
int ctx_avr; // 'average' context
|
|
int ctx_len; // context for bit length
|
|
|
|
int max_val; // max value
|
|
int max_len; // max bitlength
|
|
|
|
int dpos;
|
|
int clen, absv, sgn;
|
|
int snum;
|
|
int bt, bp;
|
|
|
|
int p_x, p_y;
|
|
int r_x; //, r_y;
|
|
int w, bc;
|
|
|
|
|
|
// decide segmentation setting
|
|
segm_tab = segm_tables[ segm_cnt[ cmp ] - 1 ];
|
|
|
|
// get max absolute value/bit length
|
|
max_val = MAX_V( cmp, 0 );
|
|
max_len = BITLEN1024P( max_val );
|
|
|
|
// init models for bitlenghts and -patterns
|
|
mod_len = INIT_MODEL_S( max_len + 1, ( segm_cnt[cmp] > max_len ) ? segm_cnt[cmp] : max_len + 1, 2 );
|
|
mod_res = INIT_MODEL_B( ( segm_cnt[cmp] < 16 ) ? 1 << 4 : segm_cnt[cmp], 2 );
|
|
mod_sgn = INIT_MODEL_B( 1, 0 );
|
|
|
|
// set width/height of each band
|
|
bc = cmpnfo[cmp].bc;
|
|
w = cmpnfo[cmp].bch;
|
|
|
|
// allocate memory for absolute values storage
|
|
absv_store = (unsigned short*) calloc ( bc, sizeof( short ) );
|
|
if ( absv_store == NULL ) {
|
|
sprintf( errormessage, MEM_ERRMSG );
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
|
|
// set up context quick access array
|
|
pjg_aavrg_prepare( c_absc, c_weight, absv_store, cmp );
|
|
|
|
// locally store pointer to coefficients and zero distribution list
|
|
coeffs = colldata[ cmp ][ 0 ];
|
|
zdstls = zdstdata[ cmp ];
|
|
|
|
// arithmetic compression loop
|
|
for ( dpos = 0; dpos < bc; dpos++ )
|
|
{
|
|
//calculate x/y positions in band
|
|
p_y = dpos / w;
|
|
// r_y = h - ( p_y + 1 );
|
|
p_x = dpos % w;
|
|
r_x = w - ( p_x + 1 );
|
|
|
|
// get segment-number from zero distribution list and segmentation set
|
|
snum = segm_tab[ zdstls[dpos] ];
|
|
// calculate contexts (for bit length)
|
|
ctx_avr = pjg_aavrg_context( c_absc, c_weight, dpos, p_y, p_x, r_x ); // AVERAGE context
|
|
ctx_len = BITLEN1024P( ctx_avr ); // BITLENGTH context
|
|
// shift context / do context modelling (segmentation is done per context)
|
|
shift_model( mod_len, ctx_len, snum );
|
|
|
|
// simple treatment if coefficient is zero
|
|
if ( coeffs[ dpos ] == 0 ) {
|
|
// encode bit length (0) of current coefficient
|
|
encode_ari( enc, mod_len, 0 );
|
|
}
|
|
else {
|
|
// get absolute val, sign & bit length for current coefficient
|
|
absv = ABS( coeffs[dpos] );
|
|
clen = BITLEN1024P( absv );
|
|
sgn = ( coeffs[dpos] > 0 ) ? 0 : 1;
|
|
// encode bit length of current coefficient
|
|
encode_ari( enc, mod_len, clen );
|
|
// encoding of residual
|
|
// first set bit must be 1, so we start at clen - 2
|
|
for ( bp = clen - 2; bp >= 0; bp-- ) {
|
|
shift_model( mod_res, snum, bp ); // shift in 2 contexts
|
|
// encode/get bit
|
|
bt = BITN( absv, bp );
|
|
encode_ari( enc, mod_res, bt );
|
|
}
|
|
// encode sign
|
|
encode_ari( enc, mod_sgn, sgn );
|
|
// store absolute value
|
|
absv_store[ dpos ] = absv;
|
|
}
|
|
}
|
|
|
|
// free memory / clear models
|
|
free( absv_store );
|
|
delete ( mod_len );
|
|
delete ( mod_res );
|
|
delete ( mod_sgn );
|
|
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
encodes high (7x7) AC coefficients to pjg
|
|
----------------------------------------------- */
|
|
INTERN bool pjg_encode_ac_high( aricoder* enc, int cmp )
|
|
{
|
|
unsigned char* segm_tab;
|
|
|
|
model_s* mod_len;
|
|
model_b* mod_sgn;
|
|
model_b* mod_res;
|
|
|
|
unsigned char* zdstls; // pointer to zero distribution list
|
|
unsigned char* eob_x; // pointer to x eobs
|
|
unsigned char* eob_y; // pointer to y eobs
|
|
signed short* coeffs; // pointer to current coefficent data
|
|
|
|
unsigned short* absv_store; // absolute coefficients values storage
|
|
unsigned short* c_absc[ 6 ]; // quick access array for contexts
|
|
int c_weight[ 6 ]; // weighting for contexts
|
|
|
|
unsigned char* sgn_store; // sign storage for context
|
|
unsigned char* sgn_nbh; // left signs neighbor
|
|
unsigned char* sgn_nbv; // upper signs neighbor
|
|
|
|
int ctx_avr; // 'average' context
|
|
int ctx_len; // context for bit length
|
|
int ctx_sgn; // context for sign
|
|
|
|
int max_val; // max value
|
|
int max_len; // max bitlength
|
|
|
|
int bpos, dpos;
|
|
int clen, absv, sgn;
|
|
int snum;
|
|
int bt, bp;
|
|
int i;
|
|
|
|
int b_x, b_y;
|
|
int p_x, p_y;
|
|
int r_x; //, r_y;
|
|
int w, bc;
|
|
|
|
|
|
// decide segmentation setting
|
|
segm_tab = segm_tables[ segm_cnt[ cmp ] - 1 ];
|
|
|
|
// init models for bitlenghts and -patterns
|
|
mod_len = INIT_MODEL_S( 11, ( segm_cnt[cmp] > 11 ) ? segm_cnt[cmp] : 11, 2 );
|
|
mod_res = INIT_MODEL_B( ( segm_cnt[cmp] < 16 ) ? 1 << 4 : segm_cnt[cmp], 2 );
|
|
mod_sgn = INIT_MODEL_B( 9, 1 );
|
|
|
|
// set width/height of each band
|
|
bc = cmpnfo[cmp].bc;
|
|
w = cmpnfo[cmp].bch;
|
|
|
|
// allocate memory for absolute values & signs storage
|
|
absv_store = (unsigned short*) calloc ( bc, sizeof( short ) );
|
|
sgn_store = (unsigned char*) calloc ( bc, sizeof( char ) );
|
|
zdstls = (unsigned char*) calloc ( bc, sizeof( char ) );
|
|
if ( ( absv_store == NULL ) || ( sgn_store == NULL ) || ( zdstls == NULL ) ) {
|
|
sprintf( errormessage, MEM_ERRMSG );
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
|
|
// set up quick access arrays for signs context
|
|
sgn_nbh = sgn_store - 1;
|
|
sgn_nbv = sgn_store - w;
|
|
|
|
// locally store pointer to eob x / eob y
|
|
eob_x = eobxhigh[ cmp ];
|
|
eob_y = eobyhigh[ cmp ];
|
|
|
|
// preset x/y eobs
|
|
memset( eob_x, 0x00, bc * sizeof( char ) );
|
|
memset( eob_y, 0x00, bc * sizeof( char ) );
|
|
|
|
// make a local copy of the zero distribution list
|
|
for ( dpos = 0; dpos < bc; dpos++ )
|
|
zdstls[ dpos ] = zdstdata[ cmp ][ dpos ];
|
|
|
|
// work through lower 7x7 bands in order of freqscan
|
|
for ( i = 1; i < 64; i++ )
|
|
{
|
|
// work through blocks in order of frequency scan
|
|
bpos = (int) freqscan[cmp][i];
|
|
b_x = unzigzag[ bpos ] % 8;
|
|
b_y = unzigzag[ bpos ] / 8;
|
|
|
|
if ( ( b_x == 0 ) || ( b_y == 0 ) )
|
|
continue; // process remaining coefficients elsewhere
|
|
|
|
// preset absolute values/sign storage
|
|
memset( absv_store, 0x00, bc * sizeof( short ) );
|
|
memset( sgn_store, 0x00, bc * sizeof( char ) );
|
|
|
|
// set up average context quick access arrays
|
|
pjg_aavrg_prepare( c_absc, c_weight, absv_store, cmp );
|
|
|
|
// locally store pointer to coefficients
|
|
coeffs = colldata[ cmp ][ bpos ];
|
|
|
|
// get max bit length
|
|
max_val = MAX_V( cmp, bpos );
|
|
max_len = BITLEN1024P( max_val );
|
|
|
|
// arithmetic compression loo
|
|
for ( dpos = 0; dpos < bc; dpos++ )
|
|
{
|
|
// skip if beyound eob
|
|
if ( zdstls[dpos] == 0 )
|
|
continue;
|
|
|
|
//calculate x/y positions in band
|
|
p_y = dpos / w;
|
|
// r_y = h - ( p_y + 1 );
|
|
p_x = dpos % w;
|
|
r_x = w - ( p_x + 1 );
|
|
|
|
// get segment-number from zero distribution list and segmentation set
|
|
snum = segm_tab[ zdstls[dpos] ];
|
|
// calculate contexts (for bit length)
|
|
ctx_avr = pjg_aavrg_context( c_absc, c_weight, dpos, p_y, p_x, r_x ); // AVERAGE context
|
|
ctx_len = BITLEN1024P( ctx_avr ); // BITLENGTH context
|
|
// shift context / do context modelling (segmentation is done per context)
|
|
shift_model( mod_len, ctx_len, snum );
|
|
mod_len->exclude_symbols( 'a', max_len );
|
|
|
|
// simple treatment if coefficient is zero
|
|
if ( coeffs[ dpos ] == 0 ) {
|
|
// encode bit length (0) of current coefficien
|
|
encode_ari( enc, mod_len, 0 );
|
|
}
|
|
else {
|
|
// get absolute val, sign & bit length for current coefficient
|
|
absv = ABS( coeffs[dpos] );
|
|
clen = BITLEN1024P( absv );
|
|
sgn = ( coeffs[dpos] > 0 ) ? 0 : 1;
|
|
// encode bit length of current coefficient
|
|
encode_ari( enc, mod_len, clen );
|
|
// encoding of residual
|
|
// first set bit must be 1, so we start at clen - 2
|
|
for ( bp = clen - 2; bp >= 0; bp-- ) {
|
|
shift_model( mod_res, snum, bp ); // shift in 2 contexts
|
|
// encode/get bit
|
|
bt = BITN( absv, bp );
|
|
encode_ari( enc, mod_res, bt );
|
|
}
|
|
// encode sign
|
|
ctx_sgn = ( p_x > 0 ) ? sgn_nbh[ dpos ] : 0; // sign context
|
|
if ( p_y > 0 ) ctx_sgn += 3 * sgn_nbv[ dpos ]; // IMPROVE !!!!!!!!!!!
|
|
mod_sgn->shift_context( ctx_sgn );
|
|
encode_ari( enc, mod_sgn, sgn );
|
|
// store absolute value/sign, decrement zdst
|
|
absv_store[ dpos ] = absv;
|
|
sgn_store[ dpos ] = sgn + 1;
|
|
zdstls[dpos]--;
|
|
// recalculate x/y eob
|
|
if ( b_x > eob_x[dpos] ) eob_x[dpos] = b_x;
|
|
if ( b_y > eob_y[dpos] ) eob_y[dpos] = b_y;
|
|
}
|
|
}
|
|
// flush models
|
|
mod_len->flush_model( 1 );
|
|
mod_res->flush_model( 1 );
|
|
mod_sgn->flush_model( 1 );
|
|
}
|
|
|
|
// free memory / clear models
|
|
free( absv_store );
|
|
free( sgn_store );
|
|
free( zdstls );
|
|
delete ( mod_len );
|
|
delete ( mod_res );
|
|
delete ( mod_sgn );
|
|
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
encodes first row/col AC coefficients to pjg
|
|
----------------------------------------------- */
|
|
INTERN bool pjg_encode_ac_low( aricoder* enc, int cmp )
|
|
{
|
|
model_s* mod_len;
|
|
model_b* mod_sgn;
|
|
model_b* mod_res;
|
|
model_b* mod_top;
|
|
|
|
unsigned char* zdstls; // pointer to row/col # of non-zeroes
|
|
signed short* coeffs; // pointer to current coefficent data
|
|
|
|
signed short* coeffs_x[ 8 ]; // prediction coeffs - current block
|
|
signed short* coeffs_a[ 8 ]; // prediction coeffs - neighboring block
|
|
int pred_cf[ 8 ]; // prediction multipliers
|
|
|
|
int ctx_lak; // lakhani context
|
|
int ctx_abs; // absolute context
|
|
int ctx_len; // context for bit length
|
|
int ctx_res; // bit plane context for residual
|
|
int ctx_sgn; // context for sign
|
|
|
|
int max_valp; // max value (+)
|
|
int max_valn; // max value (-)
|
|
int max_len; // max bitlength
|
|
int thrs_bp; // residual threshold bitplane
|
|
int* edge_c; // edge criteria
|
|
|
|
int bpos, dpos;
|
|
int clen, absv, sgn;
|
|
int bt, bp;
|
|
int i;
|
|
|
|
int b_x, b_y;
|
|
int p_x, p_y;
|
|
int w, bc;
|
|
|
|
|
|
// init models for bitlenghts and -patterns
|
|
mod_len = INIT_MODEL_S( 11, ( segm_cnt[cmp] > 11 ) ? segm_cnt[cmp] : 11, 2 );
|
|
mod_res = INIT_MODEL_B( 1 << 4, 2 );
|
|
mod_top = INIT_MODEL_B( ( nois_trs[cmp] > 4 ) ? 1 << nois_trs[cmp] : 1 << 4, 3 );
|
|
mod_sgn = INIT_MODEL_B( 11, 1 );
|
|
|
|
// set width/height of each band
|
|
bc = cmpnfo[cmp].bc;
|
|
w = cmpnfo[cmp].bch;
|
|
|
|
// work through each first row / first collumn band
|
|
for ( i = 2; i < 16; i++ )
|
|
{
|
|
// alternate between first row and first collumn
|
|
b_x = ( i % 2 == 0 ) ? i / 2 : 0;
|
|
b_y = ( i % 2 == 1 ) ? i / 2 : 0;
|
|
bpos = (int) zigzag[ b_x + (8*b_y) ];
|
|
|
|
// locally store pointer to band coefficients
|
|
coeffs = colldata[ cmp ][ bpos ];
|
|
// store pointers to prediction coefficients
|
|
if ( b_x == 0 ) {
|
|
for ( ; b_x < 8; b_x++ ) {
|
|
coeffs_x[ b_x ] = colldata[ cmp ][ zigzag[b_x+(8*b_y)] ];
|
|
coeffs_a[ b_x ] = colldata[ cmp ][ zigzag[b_x+(8*b_y)] ] - 1;
|
|
pred_cf[ b_x ] = icos_base_8x8[ b_x * 8 ] * QUANT ( cmp, zigzag[b_x+(8*b_y)] );
|
|
} b_x = 0;
|
|
zdstls = zdstylow[ cmp ];
|
|
edge_c = &p_x;
|
|
}
|
|
else { // if ( b_y == 0 )
|
|
for ( ; b_y < 8; b_y++ ) {
|
|
coeffs_x[ b_y ] = colldata[ cmp ][ zigzag[b_x+(8*b_y)] ];
|
|
coeffs_a[ b_y ] = colldata[ cmp ][ zigzag[b_x+(8*b_y)] ] - w;
|
|
pred_cf[ b_y ] = icos_base_8x8[ b_y * 8 ] * QUANT ( cmp, zigzag[b_x+(8*b_y)] );
|
|
} b_y = 0;
|
|
zdstls = zdstxlow[ cmp ];
|
|
edge_c = &p_y;
|
|
}
|
|
|
|
// get max bit length / other info
|
|
max_valp = MAX_V( cmp, bpos );
|
|
max_valn = -max_valp;
|
|
max_len = BITLEN1024P( max_valp );
|
|
thrs_bp = ( max_len > nois_trs[cmp] ) ? max_len - nois_trs[cmp] : 0;
|
|
|
|
// arithmetic compression loop
|
|
for ( dpos = 0; dpos < bc; dpos++ )
|
|
{
|
|
// skip if beyound eob
|
|
if ( zdstls[ dpos ] == 0 )
|
|
continue;
|
|
|
|
// calculate x/y positions in band
|
|
p_y = dpos / w;
|
|
p_x = dpos % w;
|
|
|
|
// edge treatment / calculate LAKHANI context
|
|
if ( (*edge_c) > 0 )
|
|
ctx_lak = pjg_lakh_context( coeffs_x, coeffs_a, pred_cf, dpos );
|
|
else ctx_lak = 0;
|
|
ctx_lak = CLAMPED( max_valn, max_valp, ctx_lak );
|
|
ctx_len = BITLEN2048N( ctx_lak ); // BITLENGTH context
|
|
|
|
// shift context / do context modelling (segmentation is done per context)
|
|
shift_model( mod_len, ctx_len, zdstls[ dpos ] );
|
|
mod_len->exclude_symbols( 'a', max_len );
|
|
|
|
// simple treatment if coefficient is zero
|
|
if ( coeffs[ dpos ] == 0 ) {
|
|
// encode bit length (0) of current coefficient
|
|
encode_ari( enc, mod_len, 0 );
|
|
}
|
|
else {
|
|
// get absolute val, sign & bit length for current coefficient
|
|
absv = ABS( coeffs[dpos] );
|
|
clen = BITLEN2048N( absv );
|
|
sgn = ( coeffs[dpos] > 0 ) ? 0 : 1;
|
|
// encode bit length of current coefficient
|
|
encode_ari( enc, mod_len, clen );
|
|
// encoding of residual
|
|
bp = clen - 2; // first set bit must be 1, so we start at clen - 2
|
|
ctx_res = ( bp >= thrs_bp ) ? 1 : 0;
|
|
ctx_abs = ABS( ctx_lak );
|
|
ctx_sgn = ( ctx_lak == 0 ) ? 0 : ( ctx_lak > 0 ) ? 1 : 2;
|
|
for ( ; bp >= thrs_bp; bp-- ) {
|
|
shift_model( mod_top, ctx_abs >> thrs_bp, ctx_res, clen - thrs_bp ); // shift in 3 contexts
|
|
// encode/get bit
|
|
bt = BITN( absv, bp );
|
|
encode_ari( enc, mod_top, bt );
|
|
// update context
|
|
ctx_res = ctx_res << 1;
|
|
if ( bt ) ctx_res |= 1;
|
|
}
|
|
for ( ; bp >= 0; bp-- ) {
|
|
shift_model( mod_res, zdstls[ dpos ], bp ); // shift in 2 contexts
|
|
// encode/get bit
|
|
bt = BITN( absv, bp );
|
|
encode_ari( enc, mod_res, bt );
|
|
}
|
|
// encode sign
|
|
shift_model( mod_sgn, ctx_len, ctx_sgn );
|
|
encode_ari( enc, mod_sgn, sgn );
|
|
// decrement # of non zeroes
|
|
zdstls[ dpos ]--;
|
|
}
|
|
}
|
|
// flush models
|
|
mod_len->flush_model( 1 );
|
|
mod_res->flush_model( 1 );
|
|
mod_top->flush_model( 1 );
|
|
mod_sgn->flush_model( 1 );
|
|
}
|
|
|
|
// free memory / clear models
|
|
delete ( mod_len );
|
|
delete ( mod_res );
|
|
delete ( mod_top );
|
|
delete ( mod_sgn );
|
|
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
encodes a stream of generic (8bit) data to pjg
|
|
----------------------------------------------- */
|
|
INTERN bool pjg_encode_generic( aricoder* enc, unsigned char* data, int len )
|
|
{
|
|
model_s* model;
|
|
int i;
|
|
|
|
|
|
// arithmetic encode data
|
|
model = INIT_MODEL_S( 256 + 1, 256, 1 );
|
|
for ( i = 0; i < len; i++ )
|
|
{
|
|
encode_ari( enc, model, data[ i ] );
|
|
model->shift_context( data[ i ] );
|
|
}
|
|
// encode end-of-data symbol (256)
|
|
encode_ari( enc, model, 256 );
|
|
delete( model );
|
|
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
encodes one bit to pjg
|
|
----------------------------------------------- */
|
|
INTERN bool pjg_encode_bit( aricoder* enc, unsigned char bit )
|
|
{
|
|
model_b* model;
|
|
|
|
|
|
// encode one bit
|
|
model = INIT_MODEL_B( 1, -1 );
|
|
encode_ari( enc, model, bit );
|
|
delete( model );
|
|
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
encodes frequency scanorder to pjg
|
|
----------------------------------------------- */
|
|
INTERN bool pjg_decode_zstscan( aricoder* dec, int cmp )
|
|
{
|
|
model_s* model;;
|
|
|
|
unsigned char freqlist[ 64 ];
|
|
int tpos; // true position
|
|
int cpos; // coded position
|
|
int i;
|
|
|
|
|
|
// set first position in zero sort scan
|
|
zsrtscan[ cmp ][ 0 ] = 0;
|
|
|
|
// preset freqlist
|
|
for ( i = 0; i < 64; i++ )
|
|
freqlist[ i ] = stdscan[ i ];
|
|
|
|
// init model
|
|
model = INIT_MODEL_S( 64, 64, 1 );
|
|
|
|
// encode scanorder
|
|
for ( i = 1; i < 64; i++ )
|
|
{
|
|
// reduce range of model
|
|
model->exclude_symbols( 'a', 64 - i );
|
|
|
|
// decode symbol
|
|
cpos = decode_ari( dec, model );
|
|
model->shift_context( cpos );
|
|
|
|
if ( cpos == 0 ) {
|
|
// remaining list is identical to scan
|
|
// fill the scan & make a quick exit
|
|
for ( tpos = 0; i < 64; i++ ) {
|
|
while ( freqlist[ ++tpos ] == 0 );
|
|
zsrtscan[ cmp ][ i ] = freqlist[ tpos ];
|
|
}
|
|
break;
|
|
}
|
|
|
|
// decode position from list
|
|
for ( tpos = 0; tpos < 64; tpos++ ) {
|
|
if ( freqlist[ tpos ] != 0 ) cpos--;
|
|
if ( cpos == 0 ) break;
|
|
}
|
|
|
|
// write decoded position to zero sort scan
|
|
zsrtscan[ cmp ][ i ] = freqlist[ tpos ];
|
|
// remove from list
|
|
freqlist[ tpos ] = 0;
|
|
}
|
|
|
|
// delete model
|
|
delete( model );
|
|
|
|
// set zero sort scan as freqscan
|
|
freqscan[ cmp ] = zsrtscan[ cmp ];
|
|
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
decodes # of non zeroes from pjg (high)
|
|
----------------------------------------------- */
|
|
INTERN bool pjg_decode_zdst_high( aricoder* dec, int cmp )
|
|
{
|
|
model_s* model;
|
|
|
|
unsigned char* zdstls;
|
|
int dpos;
|
|
int a, b;
|
|
int bc;
|
|
int w;
|
|
|
|
|
|
// init model, constants
|
|
model = INIT_MODEL_S( 49 + 1, 25 + 1, 1 );
|
|
zdstls = zdstdata[ cmp ];
|
|
w = cmpnfo[cmp].bch;
|
|
bc = cmpnfo[cmp].bc;
|
|
|
|
// arithmetic decode zero-distribution-list
|
|
for ( dpos = 0; dpos < bc; dpos++ ) {
|
|
// context modelling - use average of above and left as context
|
|
get_context_nnb( dpos, w, &a, &b );
|
|
a = ( a >= 0 ) ? zdstls[ a ] : 0;
|
|
b = ( b >= 0 ) ? zdstls[ b ] : 0;
|
|
// shift context
|
|
model->shift_context( ( a + b + 2 ) / 4 );
|
|
// decode symbol
|
|
zdstls[ dpos ] = decode_ari( dec, model );
|
|
}
|
|
|
|
// clean up
|
|
delete( model );
|
|
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
decodes # of non zeroes from pjg (low)
|
|
----------------------------------------------- */
|
|
INTERN bool pjg_decode_zdst_low( aricoder* dec, int cmp )
|
|
{
|
|
model_s* model;
|
|
|
|
unsigned char* zdstls_x;
|
|
unsigned char* zdstls_y;
|
|
unsigned char* ctx_zdst;
|
|
unsigned char* ctx_eobx;
|
|
unsigned char* ctx_eoby;
|
|
|
|
int dpos;
|
|
int bc;
|
|
|
|
|
|
// init model, constants
|
|
model = INIT_MODEL_S( 8, 8, 2 );
|
|
zdstls_x = zdstxlow[ cmp ];
|
|
zdstls_y = zdstylow[ cmp ];
|
|
ctx_eobx = eobxhigh[ cmp ];
|
|
ctx_eoby = eobyhigh[ cmp ];
|
|
ctx_zdst = zdstdata[ cmp ];
|
|
bc = cmpnfo[cmp].bc;
|
|
|
|
// arithmetic encode zero-distribution-list (first row)
|
|
for ( dpos = 0; dpos < bc; dpos++ ) {
|
|
model->shift_context( ( ctx_zdst[dpos] + 3 ) / 7 ); // shift context
|
|
model->shift_context( ctx_eobx[dpos] ); // shift context
|
|
zdstls_x[ dpos ] = decode_ari( dec, model ); // decode symbol
|
|
}
|
|
// arithmetic encode zero-distribution-list (first collumn)
|
|
for ( dpos = 0; dpos < bc; dpos++ ) {
|
|
model->shift_context( ( ctx_zdst[dpos] + 3 ) / 7 ); // shift context
|
|
model->shift_context( ctx_eoby[dpos] ); // shift context
|
|
zdstls_y[ dpos ] = decode_ari( dec, model ); // decode symbol
|
|
}
|
|
|
|
// clean up
|
|
delete( model );
|
|
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
decodes DC coefficients from pjg
|
|
----------------------------------------------- */
|
|
INTERN bool pjg_decode_dc( aricoder* dec, int cmp )
|
|
{
|
|
unsigned char* segm_tab;
|
|
|
|
model_s* mod_len;
|
|
model_b* mod_sgn;
|
|
model_b* mod_res;
|
|
|
|
unsigned char* zdstls; // pointer to zero distribution list
|
|
signed short* coeffs; // pointer to current coefficent data
|
|
|
|
unsigned short* absv_store; // absolute coefficients values storage
|
|
unsigned short* c_absc[ 6 ]; // quick access array for contexts
|
|
int c_weight[ 6 ]; // weighting for contexts
|
|
|
|
int ctx_avr; // 'average' context
|
|
int ctx_len; // context for bit length
|
|
|
|
int max_val; // max value
|
|
int max_len; // max bitlength
|
|
|
|
int dpos;
|
|
int clen, absv, sgn;
|
|
int snum;
|
|
int bt, bp;
|
|
|
|
int p_x, p_y;
|
|
int r_x; //, r_y;
|
|
int w, bc;
|
|
|
|
|
|
// decide segmentation setting
|
|
segm_tab = segm_tables[ segm_cnt[ cmp ] - 1 ];
|
|
|
|
// get max absolute value/bit length
|
|
max_val = MAX_V( cmp, 0 );
|
|
max_len = BITLEN1024P( max_val );
|
|
|
|
// init models for bitlenghts and -patterns
|
|
mod_len = INIT_MODEL_S( max_len + 1, ( segm_cnt[cmp] > max_len ) ? segm_cnt[cmp] : max_len + 1, 2 );
|
|
mod_res = INIT_MODEL_B( ( segm_cnt[cmp] < 16 ) ? 1 << 4 : segm_cnt[cmp], 2 );
|
|
mod_sgn = INIT_MODEL_B( 1, 0 );
|
|
|
|
// set width/height of each band
|
|
bc = cmpnfo[cmp].bc;
|
|
w = cmpnfo[cmp].bch;
|
|
|
|
// allocate memory for absolute values storage
|
|
absv_store = (unsigned short*) calloc ( bc, sizeof( short ) );
|
|
if ( absv_store == NULL ) {
|
|
sprintf( errormessage, MEM_ERRMSG );
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
|
|
// set up context quick access array
|
|
pjg_aavrg_prepare( c_absc, c_weight, absv_store, cmp );
|
|
|
|
// locally store pointer to coefficients and zero distribution list
|
|
coeffs = colldata[ cmp ][ 0 ];
|
|
zdstls = zdstdata[ cmp ];
|
|
|
|
// arithmetic compression loop
|
|
for ( dpos = 0; dpos < bc; dpos++ )
|
|
{
|
|
//calculate x/y positions in band
|
|
p_y = dpos / w;
|
|
// r_y = h - ( p_y + 1 );
|
|
p_x = dpos % w;
|
|
r_x = w - ( p_x + 1 );
|
|
|
|
// get segment-number from zero distribution list and segmentation set
|
|
snum = segm_tab[ zdstls[dpos] ];
|
|
// calculate contexts (for bit length)
|
|
ctx_avr = pjg_aavrg_context( c_absc, c_weight, dpos, p_y, p_x, r_x ); // AVERAGE context
|
|
ctx_len = BITLEN1024P( ctx_avr ); // BITLENGTH context
|
|
// shift context / do context modelling (segmentation is done per context)
|
|
shift_model( mod_len, ctx_len, snum );
|
|
// decode bit length of current coefficient
|
|
clen = decode_ari( dec, mod_len );
|
|
|
|
// simple treatment if coefficient is zero
|
|
if ( clen == 0 ) {
|
|
// coeffs[ dpos ] = 0;
|
|
}
|
|
else {
|
|
// decoding of residual
|
|
absv = 1;
|
|
// first set bit must be 1, so we start at clen - 2
|
|
for ( bp = clen - 2; bp >= 0; bp-- ) {
|
|
shift_model( mod_res, snum, bp ); // shift in 2 contexts
|
|
// decode bit
|
|
bt = decode_ari( dec, mod_res );
|
|
// update absv
|
|
absv = absv << 1;
|
|
if ( bt ) absv |= 1;
|
|
}
|
|
// decode sign
|
|
sgn = decode_ari( dec, mod_sgn );
|
|
// copy to colldata
|
|
coeffs[ dpos ] = ( sgn == 0 ) ? absv : -absv;
|
|
// store absolute value/sign
|
|
absv_store[ dpos ] = absv;
|
|
}
|
|
}
|
|
|
|
// free memory / clear models
|
|
free( absv_store );
|
|
delete ( mod_len );
|
|
delete ( mod_res );
|
|
delete ( mod_sgn );
|
|
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
decodes high (7x7) AC coefficients to pjg
|
|
----------------------------------------------- */
|
|
INTERN bool pjg_decode_ac_high( aricoder* dec, int cmp )
|
|
{
|
|
unsigned char* segm_tab;
|
|
|
|
model_s* mod_len;
|
|
model_b* mod_sgn;
|
|
model_b* mod_res;
|
|
|
|
unsigned char* zdstls; // pointer to zero distribution list
|
|
unsigned char* eob_x; // pointer to x eobs
|
|
unsigned char* eob_y; // pointer to y eobs
|
|
signed short* coeffs; // pointer to current coefficent data
|
|
|
|
unsigned short* absv_store; // absolute coefficients values storage
|
|
unsigned short* c_absc[ 6 ]; // quick access array for contexts
|
|
int c_weight[ 6 ]; // weighting for contexts
|
|
|
|
unsigned char* sgn_store; // sign storage for context
|
|
unsigned char* sgn_nbh; // left signs neighbor
|
|
unsigned char* sgn_nbv; // upper signs neighbor
|
|
|
|
int ctx_avr; // 'average' context
|
|
int ctx_len; // context for bit length
|
|
int ctx_sgn; // context for sign
|
|
|
|
int max_val; // max value
|
|
int max_len; // max bitlength
|
|
|
|
int bpos, dpos;
|
|
int clen, absv, sgn;
|
|
int snum;
|
|
int bt, bp;
|
|
int i;
|
|
|
|
int b_x, b_y;
|
|
int p_x, p_y;
|
|
int r_x;
|
|
int w, bc;
|
|
|
|
|
|
// decide segmentation setting
|
|
segm_tab = segm_tables[ segm_cnt[ cmp ] - 1 ];
|
|
|
|
// init models for bitlenghts and -patterns
|
|
mod_len = INIT_MODEL_S( 11, ( segm_cnt[cmp] > 11 ) ? segm_cnt[cmp] : 11, 2 );
|
|
mod_res = INIT_MODEL_B( ( segm_cnt[cmp] < 16 ) ? 1 << 4 : segm_cnt[cmp], 2 );
|
|
mod_sgn = INIT_MODEL_B( 9, 1 );
|
|
|
|
// set width/height of each band
|
|
bc = cmpnfo[cmp].bc;
|
|
w = cmpnfo[cmp].bch;
|
|
|
|
// allocate memory for absolute values & signs storage
|
|
absv_store = (unsigned short*) calloc ( bc, sizeof( short ) );
|
|
sgn_store = (unsigned char*) calloc ( bc, sizeof( char ) );
|
|
zdstls = (unsigned char*) calloc ( bc, sizeof( char ) );
|
|
if ( ( absv_store == NULL ) || ( sgn_store == NULL ) ) {
|
|
sprintf( errormessage, MEM_ERRMSG );
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
|
|
// set up quick access arrays for signs context
|
|
sgn_nbh = sgn_store - 1;
|
|
sgn_nbv = sgn_store - w;
|
|
|
|
// locally store pointer to eob x / eob y
|
|
eob_x = eobxhigh[ cmp ];
|
|
eob_y = eobyhigh[ cmp ];
|
|
|
|
// preset x/y eobs
|
|
memset( eob_x, 0x00, bc * sizeof( char ) );
|
|
memset( eob_y, 0x00, bc * sizeof( char ) );
|
|
|
|
// make a local copy of the zero distribution list
|
|
for ( dpos = 0; dpos < bc; dpos++ )
|
|
zdstls[ dpos ] = zdstdata[ cmp ][ dpos ];
|
|
|
|
// work through lower 7x7 bands in order of freqscan
|
|
for ( i = 1; i < 64; i++ )
|
|
{
|
|
// work through blocks in order of frequency scan
|
|
bpos = (int) freqscan[cmp][i];
|
|
b_x = unzigzag[ bpos ] % 8;
|
|
b_y = unzigzag[ bpos ] / 8;
|
|
|
|
if ( ( b_x == 0 ) || ( b_y == 0 ) )
|
|
continue; // process remaining coefficients elsewhere
|
|
|
|
// preset absolute values/sign storage
|
|
memset( absv_store, 0x00, bc * sizeof( short ) );
|
|
memset( sgn_store, 0x00, bc * sizeof( char ) );
|
|
|
|
// set up average context quick access arrays
|
|
pjg_aavrg_prepare( c_absc, c_weight, absv_store, cmp );
|
|
|
|
// locally store pointer to coefficients
|
|
coeffs = colldata[ cmp ][ bpos ];
|
|
|
|
// get max bit length
|
|
max_val = MAX_V( cmp, bpos );
|
|
max_len = BITLEN1024P( max_val );
|
|
|
|
// arithmetic compression loop
|
|
for ( dpos = 0; dpos < bc; dpos++ )
|
|
{
|
|
// skip if beyound eob
|
|
if ( zdstls[dpos] == 0 )
|
|
continue;
|
|
|
|
//calculate x/y positions in band
|
|
p_y = dpos / w;
|
|
// r_y = h - ( p_y + 1 );
|
|
p_x = dpos % w;
|
|
r_x = w - ( p_x + 1 );
|
|
|
|
// get segment-number from zero distribution list and segmentation set
|
|
snum = segm_tab[ zdstls[dpos] ];
|
|
// calculate contexts (for bit length)
|
|
ctx_avr = pjg_aavrg_context( c_absc, c_weight, dpos, p_y, p_x, r_x ); // AVERAGE context
|
|
ctx_len = BITLEN1024P( ctx_avr ); // BITLENGTH context
|
|
// shift context / do context modelling (segmentation is done per context)
|
|
shift_model( mod_len, ctx_len, snum );
|
|
mod_len->exclude_symbols( 'a', max_len );
|
|
|
|
// decode bit length of current coefficient
|
|
clen = decode_ari( dec, mod_len );
|
|
// simple treatment if coefficient is zero
|
|
if ( clen == 0 ) {
|
|
// coeffs[ dpos ] = 0;
|
|
}
|
|
else {
|
|
// decoding of residual
|
|
absv = 1;
|
|
// first set bit must be 1, so we start at clen - 2
|
|
for ( bp = clen - 2; bp >= 0; bp-- ) {
|
|
shift_model( mod_res, snum, bp ); // shift in 2 contexts
|
|
// decode bit
|
|
bt = decode_ari( dec, mod_res );
|
|
// update absv
|
|
absv = absv << 1;
|
|
if ( bt ) absv |= 1;
|
|
}
|
|
// decode sign
|
|
ctx_sgn = ( p_x > 0 ) ? sgn_nbh[ dpos ] : 0; // sign context
|
|
if ( p_y > 0 ) ctx_sgn += 3 * sgn_nbv[ dpos ]; // IMPROVE! !!!!!!!!!!!
|
|
mod_sgn->shift_context( ctx_sgn );
|
|
sgn = decode_ari( dec, mod_sgn );
|
|
// copy to colldata
|
|
coeffs[ dpos ] = ( sgn == 0 ) ? absv : -absv;
|
|
// store absolute value/sign, decrement zdst
|
|
absv_store[ dpos ] = absv;
|
|
sgn_store[ dpos ] = sgn + 1;
|
|
zdstls[dpos]--;
|
|
// recalculate x/y eob
|
|
if ( b_x > eob_x[dpos] ) eob_x[dpos] = b_x;
|
|
if ( b_y > eob_y[dpos] ) eob_y[dpos] = b_y;
|
|
}
|
|
}
|
|
// flush models
|
|
mod_len->flush_model( 1 );
|
|
mod_res->flush_model( 1 );
|
|
mod_sgn->flush_model( 1 );
|
|
}
|
|
|
|
// free memory / clear models
|
|
free( absv_store );
|
|
free( sgn_store );
|
|
free( zdstls );
|
|
delete ( mod_len );
|
|
delete ( mod_res );
|
|
delete ( mod_sgn );
|
|
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
decodes high (7x7) AC coefficients to pjg
|
|
----------------------------------------------- */
|
|
INTERN bool pjg_decode_ac_low( aricoder* dec, int cmp )
|
|
{
|
|
model_s* mod_len;
|
|
model_b* mod_sgn;
|
|
model_b* mod_res;
|
|
model_b* mod_top;
|
|
|
|
unsigned char* zdstls; // pointer to row/col # of non-zeroes
|
|
signed short* coeffs; // pointer to current coefficent data
|
|
|
|
signed short* coeffs_x[ 8 ]; // prediction coeffs - current block
|
|
signed short* coeffs_a[ 8 ]; // prediction coeffs - neighboring block
|
|
int pred_cf[ 8 ]; // prediction multipliers
|
|
|
|
int ctx_lak; // lakhani context
|
|
int ctx_abs; // absolute context
|
|
int ctx_len; // context for bit length
|
|
int ctx_res; // bit plane context for residual
|
|
int ctx_sgn; // context for sign
|
|
|
|
int max_valp; // max value (+)
|
|
int max_valn; // max value (-)
|
|
int max_len; // max bitlength
|
|
int thrs_bp; // residual threshold bitplane
|
|
int* edge_c; // edge criteria
|
|
|
|
int bpos, dpos;
|
|
int clen, absv, sgn;
|
|
int bt, bp;
|
|
int i;
|
|
|
|
int b_x, b_y;
|
|
int p_x, p_y;
|
|
int w, bc;
|
|
|
|
|
|
// init models for bitlenghts and -patterns
|
|
mod_len = INIT_MODEL_S( 11, ( segm_cnt[cmp] > 11 ) ? segm_cnt[cmp] : 11, 2 );
|
|
mod_res = INIT_MODEL_B( 1 << 4, 2 );
|
|
mod_top = INIT_MODEL_B( ( nois_trs[cmp] > 4 ) ? 1 << nois_trs[cmp] : 1 << 4, 3 );
|
|
mod_sgn = INIT_MODEL_B( 11, 1 );
|
|
|
|
// set width/height of each band
|
|
bc = cmpnfo[cmp].bc;
|
|
w = cmpnfo[cmp].bch;
|
|
|
|
// work through each first row / first collumn band
|
|
for ( i = 2; i < 16; i++ )
|
|
{
|
|
// alternate between first row and first collumn
|
|
b_x = ( i % 2 == 0 ) ? i / 2 : 0;
|
|
b_y = ( i % 2 == 1 ) ? i / 2 : 0;
|
|
bpos = (int) zigzag[ b_x + (8*b_y) ];
|
|
|
|
// locally store pointer to band coefficients
|
|
coeffs = colldata[ cmp ][ bpos ];
|
|
// store pointers to prediction coefficients
|
|
if ( b_x == 0 ) {
|
|
for ( ; b_x < 8; b_x++ ) {
|
|
coeffs_x[ b_x ] = colldata[ cmp ][ zigzag[b_x+(8*b_y)] ];
|
|
coeffs_a[ b_x ] = colldata[ cmp ][ zigzag[b_x+(8*b_y)] ] - 1;
|
|
pred_cf[ b_x ] = icos_base_8x8[ b_x * 8 ] * QUANT ( cmp, zigzag[b_x+(8*b_y)] );
|
|
} b_x = 0;
|
|
zdstls = zdstylow[ cmp ];
|
|
edge_c = &p_x;
|
|
}
|
|
else { // if ( b_y == 0 )
|
|
for ( ; b_y < 8; b_y++ ) {
|
|
coeffs_x[ b_y ] = colldata[ cmp ][ zigzag[b_x+(8*b_y)] ];
|
|
coeffs_a[ b_y ] = colldata[ cmp ][ zigzag[b_x+(8*b_y)] ] - w;
|
|
pred_cf[ b_y ] = icos_base_8x8[ b_y * 8 ] * QUANT ( cmp, zigzag[b_x+(8*b_y)] );
|
|
} b_y = 0;
|
|
zdstls = zdstxlow[ cmp ];
|
|
edge_c = &p_y;
|
|
}
|
|
|
|
// get max bit length / other info
|
|
max_valp = MAX_V( cmp, bpos );
|
|
max_valn = -max_valp;
|
|
max_len = BITLEN1024P( max_valp );
|
|
thrs_bp = ( max_len > nois_trs[cmp] ) ? max_len - nois_trs[cmp] : 0;
|
|
|
|
// arithmetic compression loop
|
|
for ( dpos = 0; dpos < bc; dpos++ )
|
|
{
|
|
// skip if beyound eob
|
|
if ( zdstls[ dpos ] == 0 )
|
|
continue;
|
|
|
|
//calculate x/y positions in band
|
|
p_y = dpos / w;
|
|
p_x = dpos % w;
|
|
|
|
// edge treatment / calculate LAKHANI context
|
|
if ( (*edge_c) > 0 )
|
|
ctx_lak = pjg_lakh_context( coeffs_x, coeffs_a, pred_cf, dpos );
|
|
else ctx_lak = 0;
|
|
ctx_lak = CLAMPED( max_valn, max_valp, ctx_lak );
|
|
ctx_len = BITLEN2048N( ctx_lak ); // BITLENGTH context
|
|
// shift context / do context modelling (segmentation is done per context)
|
|
shift_model( mod_len, ctx_len, zdstls[ dpos ] );
|
|
mod_len->exclude_symbols( 'a', max_len );
|
|
|
|
// decode bit length of current coefficient
|
|
clen = decode_ari( dec, mod_len );
|
|
// simple treatment if coefficients == 0
|
|
if ( clen == 0 ) {
|
|
// coeffs[ dpos ] = 0;
|
|
}
|
|
else {
|
|
// decoding of residual
|
|
bp = clen - 2; // first set bit must be 1, so we start at clen - 2
|
|
ctx_res = ( bp >= thrs_bp ) ? 1 : 0;
|
|
ctx_abs = ABS( ctx_lak );
|
|
ctx_sgn = ( ctx_lak == 0 ) ? 0 : ( ctx_lak > 0 ) ? 1 : 2;
|
|
for ( ; bp >= thrs_bp; bp-- ) {
|
|
shift_model( mod_top, ctx_abs >> thrs_bp, ctx_res, clen - thrs_bp ); // shift in 3 contexts
|
|
// decode bit
|
|
bt = decode_ari( dec, mod_top );
|
|
// update context
|
|
ctx_res = ctx_res << 1;
|
|
if ( bt ) ctx_res |= 1;
|
|
}
|
|
absv = ( ctx_res == 0 ) ? 1 : ctx_res; // !!!!
|
|
for ( ; bp >= 0; bp-- ) {
|
|
shift_model( mod_res, zdstls[ dpos ], bp ); // shift in 2 contexts
|
|
// decode bit
|
|
bt = decode_ari( dec, mod_res );
|
|
// update absv
|
|
absv = absv << 1;
|
|
if ( bt ) absv |= 1;
|
|
}
|
|
// decode sign
|
|
shift_model( mod_sgn, zdstls[ dpos ], ctx_sgn );
|
|
sgn = decode_ari( dec, mod_sgn );
|
|
// copy to colldata
|
|
coeffs[ dpos ] = ( sgn == 0 ) ? absv : -absv;
|
|
// decrement # of non zeroes
|
|
zdstls[ dpos ]--;
|
|
}
|
|
}
|
|
// flush models
|
|
mod_len->flush_model( 1 );
|
|
mod_res->flush_model( 1 );
|
|
mod_top->flush_model( 1 );
|
|
mod_sgn->flush_model( 1 );
|
|
}
|
|
|
|
// free memory / clear models
|
|
delete ( mod_len );
|
|
delete ( mod_res );
|
|
delete ( mod_top );
|
|
delete ( mod_sgn );
|
|
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
deodes a stream of generic (8bit) data from pjg
|
|
----------------------------------------------- */
|
|
INTERN bool pjg_decode_generic( aricoder* dec, unsigned char** data, int* len )
|
|
{
|
|
abytewriter* bwrt;
|
|
model_s* model;
|
|
int c;
|
|
|
|
|
|
// start byte writer
|
|
bwrt = new abytewriter( 1024 );
|
|
|
|
// decode header, ending with 256 symbol
|
|
model = INIT_MODEL_S( 256 + 1, 256, 1 );
|
|
while ( true ) {
|
|
c = decode_ari( dec, model );
|
|
if ( c == 256 ) break;
|
|
bwrt->write( (unsigned char) c );
|
|
model->shift_context( c );
|
|
}
|
|
delete( model );
|
|
|
|
// check for out of memory
|
|
if ( bwrt->error ) {
|
|
delete bwrt;
|
|
sprintf( errormessage, MEM_ERRMSG );
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
|
|
// get data/length and close byte writer
|
|
(*data) = bwrt->getptr();
|
|
if ( len != NULL ) (*len) = bwrt->getpos();
|
|
delete bwrt;
|
|
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
decodes one bit from pjg
|
|
----------------------------------------------- */
|
|
INTERN bool pjg_decode_bit( aricoder* dec, unsigned char* bit )
|
|
{
|
|
model_b* model;
|
|
|
|
|
|
model = INIT_MODEL_B( 1, -1 );
|
|
(*bit) = decode_ari( dec, model );
|
|
delete( model );
|
|
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
get zero sort frequency scan vector
|
|
----------------------------------------------- */
|
|
INTERN void pjg_get_zerosort_scan( unsigned char* sv, int cmp )
|
|
{
|
|
unsigned int zdist[ 64 ]; // distributions of zeroes per band
|
|
int bc = cmpnfo[cmp].bc;
|
|
int bpos, dpos;
|
|
bool done = false;
|
|
int swap;
|
|
int i;
|
|
|
|
|
|
// preset sv & zdist
|
|
for ( i = 0; i < 64; i++ ) {
|
|
sv[ i ] = i;
|
|
zdist[ i ] = 0;
|
|
}
|
|
|
|
// count zeroes for each frequency
|
|
for ( bpos = 0; bpos < 64; bpos++ )
|
|
for ( dpos = 0; dpos < bc; dpos++ )
|
|
if ( colldata[cmp][bpos][dpos] == 0 ) zdist[ bpos ]++;
|
|
|
|
// bubble sort according to count of zeroes (descending order)
|
|
while ( !done ) {
|
|
done = true;
|
|
for ( i = 2; i < 64; i++ )
|
|
if ( zdist[ i ] < zdist[ i - 1 ] ) {
|
|
|
|
swap = zdist[ i ];
|
|
zdist[ i ] = zdist[ i - 1 ];
|
|
zdist[ i - 1 ] = swap;
|
|
|
|
swap = sv[ i ];
|
|
sv[ i ] = sv[ i - 1 ];
|
|
sv[ i - 1 ] = swap;
|
|
|
|
done = false;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
optimizes JFIF header for compression
|
|
----------------------------------------------- */
|
|
INTERN bool pjg_optimize_header( void )
|
|
{
|
|
unsigned char type = 0x00; // type of current marker segment
|
|
unsigned int len = 0; // length of current marker segment
|
|
unsigned int hpos = 0; // position in header
|
|
|
|
unsigned int fpos; // end of marker position
|
|
unsigned int skip; // bytes to skip
|
|
unsigned int spos; // sub position
|
|
int i;
|
|
|
|
|
|
// search for DHT (0xFFC4) & DQT (0xFFDB) marker segments
|
|
// header parser loop
|
|
while ( ( int ) hpos < hdrs ) {
|
|
type = hdrdata[ hpos + 1 ];
|
|
len = 2 + B_SHORT( hdrdata[ hpos + 2 ], hdrdata[ hpos + 3 ] );
|
|
if ( type == 0xC4 ) { // for DHT
|
|
fpos = hpos + len; // reassign length to end position
|
|
hpos += 4; // skip marker & length
|
|
while ( hpos < fpos ) {
|
|
hpos++;
|
|
// table found - compare with each of the four standard tables
|
|
for ( i = 0; i < 4; i++ ) {
|
|
for ( spos = 0; spos < std_huff_lengths[ i ]; spos++ ) {
|
|
if ( hdrdata[ hpos + spos ] != std_huff_tables[ i ][ spos ] )
|
|
break;
|
|
}
|
|
// check if comparison ok
|
|
if ( spos != std_huff_lengths[ i ] )
|
|
continue;
|
|
|
|
// if we get here, the table matches the standard table
|
|
// number 'i', so it can be replaced
|
|
hdrdata[ hpos + 0 ] = std_huff_lengths[ i ] - 16 - i;
|
|
hdrdata[ hpos + 1 ] = i;
|
|
for ( spos = 2; spos < std_huff_lengths[ i ]; spos++ )
|
|
hdrdata[ hpos + spos ] = 0x00;
|
|
// everything done here, so leave
|
|
break;
|
|
}
|
|
|
|
skip = 16;
|
|
for ( i = 0; i < 16; i++ )
|
|
skip += ( int ) hdrdata[ hpos + i ];
|
|
hpos += skip;
|
|
}
|
|
}
|
|
else if ( type == 0xDB ) { // for DQT
|
|
fpos = hpos + len; // reassign length to end position
|
|
hpos += 4; // skip marker & length
|
|
while ( hpos < fpos ) {
|
|
i = LBITS( hdrdata[ hpos ], 4 );
|
|
hpos++;
|
|
// table found
|
|
if ( i == 1 ) { // get out for 16 bit precision
|
|
hpos += 128;
|
|
continue;
|
|
}
|
|
// do diff coding for 8 bit precision
|
|
for ( spos = 63; spos > 0; spos-- )
|
|
hdrdata[ hpos + spos ] -= hdrdata[ hpos + spos - 1 ];
|
|
|
|
hpos += 64;
|
|
}
|
|
}
|
|
else { // skip segment
|
|
hpos += len;
|
|
}
|
|
}
|
|
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
undoes the header optimizations
|
|
----------------------------------------------- */
|
|
INTERN bool pjg_unoptimize_header( void )
|
|
{
|
|
unsigned char type = 0x00; // type of current marker segment
|
|
unsigned int len = 0; // length of current marker segment
|
|
unsigned int hpos = 0; // position in header
|
|
|
|
unsigned int fpos; // end of marker position
|
|
unsigned int skip; // bytes to skip
|
|
unsigned int spos; // sub position
|
|
int i;
|
|
|
|
|
|
// search for DHT (0xFFC4) & DQT (0xFFDB) marker segments
|
|
// header parser loop
|
|
while ( ( int ) hpos < hdrs ) {
|
|
type = hdrdata[ hpos + 1 ];
|
|
len = 2 + B_SHORT( hdrdata[ hpos + 2 ], hdrdata[ hpos + 3 ] );
|
|
|
|
if ( type == 0xC4 ) { // for DHT
|
|
fpos = hpos + len; // reassign length to end position
|
|
hpos += 4; // skip marker & length
|
|
while ( hpos < fpos ) {
|
|
hpos++;
|
|
// table found - check if modified
|
|
if ( hdrdata[ hpos ] > 2 ) {
|
|
// reinsert the standard table
|
|
i = hdrdata[ hpos + 1 ];
|
|
for ( spos = 0; spos < std_huff_lengths[ i ]; spos++ ) {
|
|
hdrdata[ hpos + spos ] = std_huff_tables[ i ][ spos ];
|
|
}
|
|
}
|
|
|
|
skip = 16;
|
|
for ( i = 0; i < 16; i++ )
|
|
skip += ( int ) hdrdata[ hpos + i ];
|
|
hpos += skip;
|
|
}
|
|
}
|
|
else if ( type == 0xDB ) { // for DQT
|
|
fpos = hpos + len; // reassign length to end position
|
|
hpos += 4; // skip marker & length
|
|
while ( hpos < fpos ) {
|
|
i = LBITS( hdrdata[ hpos ], 4 );
|
|
hpos++;
|
|
// table found
|
|
if ( i == 1 ) { // get out for 16 bit precision
|
|
hpos += 128;
|
|
continue;
|
|
}
|
|
// undo diff coding for 8 bit precision
|
|
for ( spos = 1; spos < 64; spos++ )
|
|
hdrdata[ hpos + spos ] += hdrdata[ hpos + spos - 1 ];
|
|
|
|
hpos += 64;
|
|
}
|
|
}
|
|
else { // skip segment
|
|
hpos += len;
|
|
}
|
|
}
|
|
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
preparations for special average context
|
|
----------------------------------------------- */
|
|
INTERN void pjg_aavrg_prepare( unsigned short** abs_coeffs, int* weights, unsigned short* abs_store, int cmp )
|
|
{
|
|
int w = cmpnfo[cmp].bch;
|
|
|
|
// set up quick access arrays for all prediction positions
|
|
abs_coeffs[ 0 ] = abs_store + ( 0 + ((-2)*w) ); // top-top
|
|
abs_coeffs[ 1 ] = abs_store + ( -1 + ((-1)*w) ); // top-left
|
|
abs_coeffs[ 2 ] = abs_store + ( 0 + ((-1)*w) ); // top
|
|
abs_coeffs[ 3 ] = abs_store + ( 1 + ((-1)*w) ); // top-right
|
|
abs_coeffs[ 4 ] = abs_store + ( -2 + (( 0)*w) ); // left-left
|
|
abs_coeffs[ 5 ] = abs_store + ( -1 + (( 0)*w) ); // left
|
|
// copy context weighting factors
|
|
weights[ 0 ] = abs_ctx_weights_lum[ 0 ][ 0 ][ 2 ]; // top-top
|
|
weights[ 1 ] = abs_ctx_weights_lum[ 0 ][ 1 ][ 1 ]; // top-left
|
|
weights[ 2 ] = abs_ctx_weights_lum[ 0 ][ 1 ][ 2 ]; // top
|
|
weights[ 3 ] = abs_ctx_weights_lum[ 0 ][ 1 ][ 3 ]; // top-right
|
|
weights[ 4 ] = abs_ctx_weights_lum[ 0 ][ 2 ][ 0 ]; // left-left
|
|
weights[ 5 ] = abs_ctx_weights_lum[ 0 ][ 2 ][ 1 ]; // left
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
special average context used in coeff encoding
|
|
----------------------------------------------- */
|
|
INTERN int pjg_aavrg_context( unsigned short** abs_coeffs, int* weights, int pos, int p_y, int p_x, int r_x )
|
|
{
|
|
int ctx_avr = 0; // AVERAGE context
|
|
int w_ctx = 0; // accumulated weight of context
|
|
int w_curr; // current weight of context
|
|
|
|
|
|
// different cases due to edge treatment
|
|
if ( p_y >= 2 ) {
|
|
w_curr = weights[ 0 ]; ctx_avr += abs_coeffs[ 0 ][ pos ] * w_curr; w_ctx += w_curr;
|
|
w_curr = weights[ 2 ]; ctx_avr += abs_coeffs[ 2 ][ pos ] * w_curr; w_ctx += w_curr;
|
|
if ( p_x >= 2 ) {
|
|
w_curr = weights[ 1 ]; ctx_avr += abs_coeffs[ 1 ][ pos ] * w_curr; w_ctx += w_curr;
|
|
w_curr = weights[ 4 ]; ctx_avr += abs_coeffs[ 4 ][ pos ] * w_curr; w_ctx += w_curr;
|
|
w_curr = weights[ 5 ]; ctx_avr += abs_coeffs[ 5 ][ pos ] * w_curr; w_ctx += w_curr;
|
|
}
|
|
else if ( p_x == 1 ) {
|
|
w_curr = weights[ 1 ]; ctx_avr += abs_coeffs[ 1 ][ pos ] * w_curr; w_ctx += w_curr;
|
|
w_curr = weights[ 5 ]; ctx_avr += abs_coeffs[ 5 ][ pos ] * w_curr; w_ctx += w_curr;
|
|
}
|
|
if ( r_x >= 1 ) {
|
|
w_curr = weights[ 3 ]; ctx_avr += abs_coeffs[ 3 ][ pos ] * w_curr; w_ctx += w_curr;
|
|
}
|
|
}
|
|
else if ( p_y == 1 ) {
|
|
w_curr = weights[ 2 ]; ctx_avr += abs_coeffs[ 2 ][ pos ] * w_curr; w_ctx += w_curr;
|
|
if ( p_x >= 2 ) {
|
|
w_curr = weights[ 1 ]; ctx_avr += abs_coeffs[ 1 ][ pos ] * w_curr; w_ctx += w_curr;
|
|
w_curr = weights[ 4 ]; ctx_avr += abs_coeffs[ 4 ][ pos ] * w_curr; w_ctx += w_curr;
|
|
w_curr = weights[ 5 ]; ctx_avr += abs_coeffs[ 5 ][ pos ] * w_curr; w_ctx += w_curr;
|
|
}
|
|
else if ( p_x == 1 ) {
|
|
w_curr = weights[ 1 ]; ctx_avr += abs_coeffs[ 1 ][ pos ] * w_curr; w_ctx += w_curr;
|
|
w_curr = weights[ 5 ]; ctx_avr += abs_coeffs[ 5 ][ pos ] * w_curr; w_ctx += w_curr;
|
|
}
|
|
if ( r_x >= 1 ) {
|
|
w_curr = weights[ 3 ]; ctx_avr += abs_coeffs[ 3 ][ pos ] * w_curr; w_ctx += w_curr;
|
|
}
|
|
}
|
|
else {
|
|
if ( p_x >= 2 ) {
|
|
w_curr = weights[ 4 ]; ctx_avr += abs_coeffs[ 4 ][ pos ] * w_curr; w_ctx += w_curr;
|
|
w_curr = weights[ 5 ]; ctx_avr += abs_coeffs[ 5 ][ pos ] * w_curr; w_ctx += w_curr;
|
|
}
|
|
else if ( p_x == 1 ) {
|
|
w_curr = weights[ 5 ]; ctx_avr += abs_coeffs[ 5 ][ pos ] * w_curr; w_ctx += w_curr;
|
|
}
|
|
}
|
|
|
|
// return average context
|
|
return ( w_ctx != 0 ) ? ( ctx_avr + ( w_ctx / 2 ) ) / w_ctx : 0;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
lakhani ac context used in coeff encoding
|
|
----------------------------------------------- */
|
|
INTERN int pjg_lakh_context( signed short** coeffs_x, signed short** coeffs_a, int* pred_cf, int pos )
|
|
{
|
|
int pred = 0;
|
|
|
|
// calculate partial prediction
|
|
pred -= ( coeffs_x[ 1 ][ pos ] + coeffs_a[ 1 ][ pos ] ) * pred_cf[ 1 ];
|
|
pred -= ( coeffs_x[ 2 ][ pos ] - coeffs_a[ 2 ][ pos ] ) * pred_cf[ 2 ];
|
|
pred -= ( coeffs_x[ 3 ][ pos ] + coeffs_a[ 3 ][ pos ] ) * pred_cf[ 3 ];
|
|
pred -= ( coeffs_x[ 4 ][ pos ] - coeffs_a[ 4 ][ pos ] ) * pred_cf[ 4 ];
|
|
pred -= ( coeffs_x[ 5 ][ pos ] + coeffs_a[ 5 ][ pos ] ) * pred_cf[ 5 ];
|
|
pred -= ( coeffs_x[ 6 ][ pos ] - coeffs_a[ 6 ][ pos ] ) * pred_cf[ 6 ];
|
|
pred -= ( coeffs_x[ 7 ][ pos ] + coeffs_a[ 7 ][ pos ] ) * pred_cf[ 7 ];
|
|
// normalize / quantize partial prediction
|
|
pred = ( ( pred > 0 ) ? ( pred + (pred_cf[0]/2) ) : ( pred - (pred_cf[0]/2) ) ) / pred_cf[ 0 ];
|
|
// complete prediction
|
|
pred += coeffs_a[ 0 ][ pos ];
|
|
|
|
return pred;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
Calculates coordinates for nearest neighbor context
|
|
----------------------------------------------- */
|
|
INTERN void get_context_nnb( int pos, int w, int *a, int *b )
|
|
{
|
|
// this function calculates and returns coordinates for
|
|
// a simple 2D context
|
|
if ( pos == 0 ) {
|
|
*a = -1;
|
|
*b = -1;
|
|
}
|
|
else if ( ( pos % w ) == 0 ) {
|
|
*b = pos - w;
|
|
if ( pos >= ( w << 1 ) )
|
|
*a = pos - ( w << 1 );
|
|
else
|
|
*a = *b;
|
|
}
|
|
else if ( pos < w ) {
|
|
*a = pos - 1;
|
|
if ( pos >= 2 )
|
|
*b = pos - 2;
|
|
else
|
|
*b = *a;
|
|
}
|
|
else {
|
|
*a = pos - 1;
|
|
*b = pos - w;
|
|
}
|
|
}
|
|
|
|
/* ----------------------- End of PJG specific functions -------------------------- */
|
|
|
|
/* ----------------------- Begin ofDCT specific functions -------------------------- */
|
|
|
|
|
|
/* -----------------------------------------------
|
|
inverse DCT transform using precalc tables (fast)
|
|
----------------------------------------------- */
|
|
#if !defined(BUILD_LIB) && defined(DEV_BUILD)
|
|
INTERN int idct_2d_fst_8x8( int cmp, int dpos, int ix, int iy )
|
|
{
|
|
int idct = 0;
|
|
int ixy;
|
|
|
|
|
|
// calculate start index
|
|
ixy = ( ( iy << 3 ) + ix ) << 6;
|
|
|
|
// begin transform
|
|
idct += colldata[ cmp ][ 0 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 0 ];
|
|
idct += colldata[ cmp ][ 1 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 1 ];
|
|
idct += colldata[ cmp ][ 5 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 2 ];
|
|
idct += colldata[ cmp ][ 6 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 3 ];
|
|
idct += colldata[ cmp ][ 14 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 4 ];
|
|
idct += colldata[ cmp ][ 15 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 5 ];
|
|
idct += colldata[ cmp ][ 27 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 6 ];
|
|
idct += colldata[ cmp ][ 28 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 7 ];
|
|
idct += colldata[ cmp ][ 2 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 8 ];
|
|
idct += colldata[ cmp ][ 4 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 9 ];
|
|
idct += colldata[ cmp ][ 7 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 10 ];
|
|
idct += colldata[ cmp ][ 13 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 11 ];
|
|
idct += colldata[ cmp ][ 16 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 12 ];
|
|
idct += colldata[ cmp ][ 26 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 13 ];
|
|
idct += colldata[ cmp ][ 29 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 14 ];
|
|
idct += colldata[ cmp ][ 42 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 15 ];
|
|
idct += colldata[ cmp ][ 3 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 16 ];
|
|
idct += colldata[ cmp ][ 8 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 17 ];
|
|
idct += colldata[ cmp ][ 12 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 18 ];
|
|
idct += colldata[ cmp ][ 17 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 19 ];
|
|
idct += colldata[ cmp ][ 25 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 20 ];
|
|
idct += colldata[ cmp ][ 30 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 21 ];
|
|
idct += colldata[ cmp ][ 41 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 22 ];
|
|
idct += colldata[ cmp ][ 43 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 23 ];
|
|
idct += colldata[ cmp ][ 9 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 24 ];
|
|
idct += colldata[ cmp ][ 11 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 25 ];
|
|
idct += colldata[ cmp ][ 18 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 26 ];
|
|
idct += colldata[ cmp ][ 24 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 27 ];
|
|
idct += colldata[ cmp ][ 31 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 28 ];
|
|
idct += colldata[ cmp ][ 40 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 29 ];
|
|
idct += colldata[ cmp ][ 44 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 30 ];
|
|
idct += colldata[ cmp ][ 53 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 31 ];
|
|
idct += colldata[ cmp ][ 10 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 32 ];
|
|
idct += colldata[ cmp ][ 19 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 33 ];
|
|
idct += colldata[ cmp ][ 23 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 34 ];
|
|
idct += colldata[ cmp ][ 32 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 35 ];
|
|
idct += colldata[ cmp ][ 39 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 36 ];
|
|
idct += colldata[ cmp ][ 45 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 37 ];
|
|
idct += colldata[ cmp ][ 52 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 38 ];
|
|
idct += colldata[ cmp ][ 54 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 39 ];
|
|
idct += colldata[ cmp ][ 20 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 40 ];
|
|
idct += colldata[ cmp ][ 22 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 41 ];
|
|
idct += colldata[ cmp ][ 33 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 42 ];
|
|
idct += colldata[ cmp ][ 38 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 43 ];
|
|
idct += colldata[ cmp ][ 46 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 44 ];
|
|
idct += colldata[ cmp ][ 51 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 45 ];
|
|
idct += colldata[ cmp ][ 55 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 46 ];
|
|
idct += colldata[ cmp ][ 60 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 47 ];
|
|
idct += colldata[ cmp ][ 21 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 48 ];
|
|
idct += colldata[ cmp ][ 34 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 49 ];
|
|
idct += colldata[ cmp ][ 37 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 50 ];
|
|
idct += colldata[ cmp ][ 47 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 51 ];
|
|
idct += colldata[ cmp ][ 50 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 52 ];
|
|
idct += colldata[ cmp ][ 56 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 53 ];
|
|
idct += colldata[ cmp ][ 59 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 54 ];
|
|
idct += colldata[ cmp ][ 61 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 55 ];
|
|
idct += colldata[ cmp ][ 35 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 56 ];
|
|
idct += colldata[ cmp ][ 36 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 57 ];
|
|
idct += colldata[ cmp ][ 48 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 58 ];
|
|
idct += colldata[ cmp ][ 49 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 59 ];
|
|
idct += colldata[ cmp ][ 57 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 60 ];
|
|
idct += colldata[ cmp ][ 58 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 61 ];
|
|
idct += colldata[ cmp ][ 62 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 62 ];
|
|
idct += colldata[ cmp ][ 63 ][ dpos ] * adpt_idct_8x8[ cmp ][ ixy + 63 ];
|
|
|
|
|
|
return idct;
|
|
}
|
|
#endif
|
|
|
|
|
|
/* -----------------------------------------------
|
|
inverse DCT transform using precalc tables (fast)
|
|
----------------------------------------------- */
|
|
INTERN int idct_2d_fst_8x1( int cmp, int dpos, int ix, int iy )
|
|
{
|
|
int idct = 0;
|
|
int ixy;
|
|
|
|
|
|
// calculate start index
|
|
ixy = ix << 3;
|
|
|
|
// begin transform
|
|
idct += colldata[ cmp ][ 0 ][ dpos ] * adpt_idct_8x1[ cmp ][ ixy + 0 ];
|
|
idct += colldata[ cmp ][ 1 ][ dpos ] * adpt_idct_8x1[ cmp ][ ixy + 1 ];
|
|
idct += colldata[ cmp ][ 5 ][ dpos ] * adpt_idct_8x1[ cmp ][ ixy + 2 ];
|
|
idct += colldata[ cmp ][ 6 ][ dpos ] * adpt_idct_8x1[ cmp ][ ixy + 3 ];
|
|
idct += colldata[ cmp ][ 14 ][ dpos ] * adpt_idct_8x1[ cmp ][ ixy + 4 ];
|
|
idct += colldata[ cmp ][ 15 ][ dpos ] * adpt_idct_8x1[ cmp ][ ixy + 5 ];
|
|
idct += colldata[ cmp ][ 27 ][ dpos ] * adpt_idct_8x1[ cmp ][ ixy + 6 ];
|
|
idct += colldata[ cmp ][ 28 ][ dpos ] * adpt_idct_8x1[ cmp ][ ixy + 7 ];
|
|
|
|
|
|
return idct;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
inverse DCT transform using precalc tables (fast)
|
|
----------------------------------------------- */
|
|
INTERN int idct_2d_fst_1x8( int cmp, int dpos, int ix, int iy )
|
|
{
|
|
int idct = 0;
|
|
int ixy;
|
|
|
|
|
|
// calculate start index
|
|
ixy = iy << 3;
|
|
|
|
// begin transform
|
|
idct += colldata[ cmp ][ 0 ][ dpos ] * adpt_idct_1x8[ cmp ][ ixy + 0 ];
|
|
idct += colldata[ cmp ][ 2 ][ dpos ] * adpt_idct_1x8[ cmp ][ ixy + 1 ];
|
|
idct += colldata[ cmp ][ 3 ][ dpos ] * adpt_idct_1x8[ cmp ][ ixy + 2 ];
|
|
idct += colldata[ cmp ][ 9 ][ dpos ] * adpt_idct_1x8[ cmp ][ ixy + 3 ];
|
|
idct += colldata[ cmp ][ 10 ][ dpos ] * adpt_idct_1x8[ cmp ][ ixy + 4 ];
|
|
idct += colldata[ cmp ][ 20 ][ dpos ] * adpt_idct_1x8[ cmp ][ ixy + 5 ];
|
|
idct += colldata[ cmp ][ 21 ][ dpos ] * adpt_idct_1x8[ cmp ][ ixy + 6 ];
|
|
idct += colldata[ cmp ][ 35 ][ dpos ] * adpt_idct_1x8[ cmp ][ ixy + 7 ];
|
|
|
|
|
|
return idct;
|
|
}
|
|
|
|
/* ----------------------- End of DCT specific functions -------------------------- */
|
|
|
|
/* ----------------------- Begin of prediction functions -------------------------- */
|
|
|
|
|
|
/* -----------------------------------------------
|
|
returns predictor for collection data
|
|
----------------------------------------------- */
|
|
#if defined(USE_PLOCOI)
|
|
INTERN int dc_coll_predictor( int cmp, int dpos )
|
|
{
|
|
signed short* coefs = colldata[ cmp ][ 0 ];
|
|
int w = cmpnfo[cmp].bch;
|
|
int a, b, c;
|
|
|
|
if ( dpos < w ) {
|
|
a = coefs[ dpos - 1 ];
|
|
b = 0;
|
|
c = 0;
|
|
}
|
|
else if ( (dpos%w) == 0 ) {
|
|
a = 0;
|
|
b = coefs[ dpos - w ];
|
|
c = 0;
|
|
}
|
|
else {
|
|
a = coefs[ dpos - 1 ];
|
|
b = coefs[ dpos - w ];
|
|
c = coefs[ dpos - 1 - w ];
|
|
}
|
|
|
|
return plocoi( a, b, c );
|
|
}
|
|
#endif
|
|
|
|
|
|
/* -----------------------------------------------
|
|
1D DCT predictor for DC coefficients
|
|
----------------------------------------------- */
|
|
#if !defined(USE_PLOCOI)
|
|
INTERN int dc_1ddct_predictor( int cmp, int dpos )
|
|
{
|
|
int w = cmpnfo[cmp].bch;
|
|
int px = ( dpos % w );
|
|
int py = ( dpos / w );
|
|
|
|
int pred;
|
|
int pa = 0;
|
|
int pb = 0;
|
|
int xa = 0;
|
|
int xb = 0;
|
|
int swap;
|
|
|
|
|
|
// store current block DC coefficient
|
|
swap = colldata[ cmp ][ 0 ][ dpos ];
|
|
colldata[ cmp ][ 0 ][ dpos ] = 0;
|
|
|
|
// calculate prediction
|
|
if ( ( px > 0 ) && ( py > 0 ) ) {
|
|
pa = idct_2d_fst_8x1( cmp, dpos - 1, 7, 0 );
|
|
pb = idct_2d_fst_1x8( cmp, dpos - w, 0, 7 );
|
|
xa = idct_2d_fst_8x1( cmp, dpos, 0, 0 );
|
|
xb = idct_2d_fst_1x8( cmp, dpos, 0, 0 );
|
|
pred = ( ( pa - xa ) + ( pb - xb ) ) * ( 8 / 2 );
|
|
}
|
|
else if ( px > 0 ) {
|
|
pa = idct_2d_fst_8x1( cmp, dpos - 1, 7, 0 );
|
|
xa = idct_2d_fst_8x1( cmp, dpos, 0, 0 );
|
|
pred = ( pa - xa ) * 8;
|
|
}
|
|
else if ( py > 0 ) {
|
|
pb = idct_2d_fst_1x8( cmp, dpos - w, 0, 7 );
|
|
xb = idct_2d_fst_1x8( cmp, dpos, 0, 0 );
|
|
pred = ( pb - xb ) * 8;
|
|
}
|
|
else {
|
|
pred = 0;
|
|
}
|
|
|
|
// write back current DCT coefficient
|
|
colldata[ cmp ][ 0 ][ dpos ] = swap;
|
|
|
|
// clamp and quantize predictor
|
|
pred = CLAMPED( -( 1024 * DCT_RSC_FACTOR ), ( 1016 * DCT_RSC_FACTOR ), pred );
|
|
pred = pred / QUANT( cmp, 0 );
|
|
pred = DCT_RESCALE( pred );
|
|
|
|
|
|
return pred;
|
|
}
|
|
#endif
|
|
|
|
|
|
/* -----------------------------------------------
|
|
loco-i predictor
|
|
----------------------------------------------- */
|
|
INTERN inline int plocoi( int a, int b, int c )
|
|
{
|
|
// a -> left; b -> above; c -> above-left
|
|
int min, max;
|
|
|
|
min = ( a < b ) ? a : b;
|
|
max = ( a > b ) ? a : b;
|
|
|
|
if ( c >= max ) return min;
|
|
if ( c <= min ) return max;
|
|
|
|
return a + b - c;
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
calculates median out of an integer array
|
|
----------------------------------------------- */
|
|
INTERN inline int median_int( int* values, int size )
|
|
{
|
|
int middle = ( size >> 1 );
|
|
bool done;
|
|
int swap;
|
|
int i;
|
|
|
|
|
|
// sort data first
|
|
done = false;
|
|
while ( !done ) {
|
|
done = true;
|
|
for ( i = 1; i < size; i++ )
|
|
if ( values[ i ] < values[ i - 1 ] ) {
|
|
swap = values[ i ];
|
|
values[ i ] = values[ i - 1 ];
|
|
values[ i - 1 ] = swap;
|
|
done = false;
|
|
}
|
|
}
|
|
|
|
// return median
|
|
return ( ( size % 2 ) == 0 ) ?
|
|
( values[ middle ] + values[ middle - 1 ] ) / 2 : values[ middle ];
|
|
}
|
|
|
|
|
|
/* -----------------------------------------------
|
|
calculates median out of an float array
|
|
----------------------------------------------- */
|
|
INTERN inline float median_float( float* values, int size )
|
|
{
|
|
int middle = ( size >> 1 );
|
|
bool done;
|
|
float swap;
|
|
int i;
|
|
|
|
|
|
// sort data first
|
|
done = false;
|
|
while ( !done ) {
|
|
done = true;
|
|
for ( i = 1; i < size; i++ )
|
|
if ( values[ i ] < values[ i - 1 ] ) {
|
|
swap = values[ i ];
|
|
values[ i ] = values[ i - 1 ];
|
|
values[ i - 1 ] = swap;
|
|
done = false;
|
|
}
|
|
}
|
|
|
|
// return median
|
|
if ( ( size % 2 ) == 0 ) {
|
|
return ( values[ middle ] + values[ middle - 1 ] ) / 2.0;
|
|
}
|
|
else
|
|
return ( values[ middle ] );
|
|
}
|
|
|
|
/* ----------------------- End of prediction functions -------------------------- */
|
|
|
|
/* ----------------------- Begin of miscellaneous helper functions -------------------------- */
|
|
|
|
|
|
/* -----------------------------------------------
|
|
displays progress bar on screen
|
|
----------------------------------------------- */
|
|
#if !defined(BUILD_LIB)
|
|
INTERN inline void progress_bar( int current, int last )
|
|
{
|
|
int barpos = ( ( current * BARLEN ) + ( last / 2 ) ) / last;
|
|
int i;
|
|
|
|
|
|
// generate progress bar
|
|
fprintf( msgout, "[" );
|
|
#if defined(_WIN32)
|
|
for ( i = 0; i < barpos; i++ )
|
|
fprintf( msgout, "\xFE" );
|
|
#else
|
|
for ( i = 0; i < barpos; i++ )
|
|
fprintf( msgout, "X" );
|
|
#endif
|
|
for ( ; i < BARLEN; i++ )
|
|
fprintf( msgout, " " );
|
|
fprintf( msgout, "]" );
|
|
}
|
|
#endif
|
|
|
|
/* -----------------------------------------------
|
|
creates filename, callocs memory for it
|
|
----------------------------------------------- */
|
|
#if !defined(BUILD_LIB)
|
|
INTERN inline char* create_filename( const char* base, const char* extension )
|
|
{
|
|
int len = strlen( base ) + ( ( extension == NULL ) ? 0 : strlen( extension ) + 1 ) + 1;
|
|
char* filename = (char*) calloc( len, sizeof( char ) );
|
|
|
|
// create a filename from base & extension
|
|
strcpy( filename, base );
|
|
set_extension( filename, extension );
|
|
|
|
return filename;
|
|
}
|
|
#endif
|
|
|
|
/* -----------------------------------------------
|
|
creates filename, callocs memory for it
|
|
----------------------------------------------- */
|
|
#if !defined(BUILD_LIB)
|
|
INTERN inline char* unique_filename( const char* base, const char* extension )
|
|
{
|
|
int len = strlen( base ) + ( ( extension == NULL ) ? 0 : strlen( extension ) + 1 ) + 1;
|
|
char* filename = (char*) calloc( len, sizeof( char ) );
|
|
|
|
// create a unique filename using underscores
|
|
strcpy( filename, base );
|
|
set_extension( filename, extension );
|
|
while ( file_exists( filename ) ) {
|
|
len += sizeof( char );
|
|
filename = (char*) realloc( filename, len );
|
|
add_underscore( filename );
|
|
}
|
|
|
|
return filename;
|
|
}
|
|
#endif
|
|
|
|
/* -----------------------------------------------
|
|
changes extension of filename
|
|
----------------------------------------------- */
|
|
#if !defined(BUILD_LIB)
|
|
INTERN inline void set_extension( char* filename, const char* extension )
|
|
{
|
|
char* extstr;
|
|
|
|
// find position of extension in filename
|
|
extstr = ( strrchr( filename, '.' ) == NULL ) ?
|
|
strrchr( filename, '\0' ) : strrchr( filename, '.' );
|
|
|
|
// set new extension
|
|
if ( extension != NULL ) {
|
|
(*extstr++) = '.';
|
|
strcpy( extstr, extension );
|
|
}
|
|
else
|
|
(*extstr) = '\0';
|
|
}
|
|
#endif
|
|
|
|
/* -----------------------------------------------
|
|
adds underscore after filename
|
|
----------------------------------------------- */
|
|
#if !defined(BUILD_LIB)
|
|
INTERN inline void add_underscore( char* filename )
|
|
{
|
|
char* tmpname = (char*) calloc( strlen( filename ) + 1, sizeof( char ) );
|
|
char* extstr;
|
|
|
|
// copy filename to tmpname
|
|
strcpy( tmpname, filename );
|
|
// search extension in filename
|
|
extstr = strrchr( filename, '.' );
|
|
|
|
// add underscore before extension
|
|
if ( extstr != NULL ) {
|
|
(*extstr++) = '_';
|
|
strcpy( extstr, strrchr( tmpname, '.' ) );
|
|
}
|
|
else
|
|
sprintf( filename, "%s_", tmpname );
|
|
|
|
// free memory
|
|
free( tmpname );
|
|
}
|
|
#endif
|
|
|
|
/* -----------------------------------------------
|
|
checks if a file exists
|
|
----------------------------------------------- */
|
|
INTERN inline bool file_exists( const char* filename )
|
|
{
|
|
// needed for both, executable and library
|
|
FILE* fp = fopen( filename, "rb" );
|
|
|
|
if ( fp == NULL ) return false;
|
|
else {
|
|
fclose( fp );
|
|
return true;
|
|
}
|
|
}
|
|
|
|
/* ----------------------- End of miscellaneous helper functions -------------------------- */
|
|
|
|
/* ----------------------- Begin of developers functions -------------------------- */
|
|
|
|
|
|
/* -----------------------------------------------
|
|
Writes header file
|
|
----------------------------------------------- */
|
|
#if !defined(BUILD_LIB) && defined(DEV_BUILD)
|
|
INTERN bool dump_hdr( void )
|
|
{
|
|
const char* ext = "hdr";
|
|
const char* basename = filelist[ file_no ];
|
|
|
|
if ( !dump_file( basename, ext, hdrdata, 1, hdrs ) )
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
#endif
|
|
|
|
|
|
/* -----------------------------------------------
|
|
Writes huffman coded file
|
|
----------------------------------------------- */
|
|
#if !defined(BUILD_LIB) && defined(DEV_BUILD)
|
|
INTERN bool dump_huf( void )
|
|
{
|
|
const char* ext = "huf";
|
|
const char* basename = filelist[ file_no ];
|
|
|
|
if ( !dump_file( basename, ext, huffdata, 1, hufs ) )
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
#endif
|
|
|
|
|
|
/* -----------------------------------------------
|
|
Writes collections of DCT coefficients
|
|
----------------------------------------------- */
|
|
#if !defined(BUILD_LIB) && defined(DEV_BUILD)
|
|
INTERN bool dump_coll( void )
|
|
{
|
|
FILE* fp;
|
|
|
|
char* fn;
|
|
const char* ext[ 4 ];
|
|
const char* base;
|
|
int cmp, bpos, dpos;
|
|
int i, j;
|
|
|
|
ext[0] = "coll0";
|
|
ext[1] = "coll1";
|
|
ext[2] = "coll2";
|
|
ext[3] = "coll3";
|
|
base = filelist[ file_no ];
|
|
|
|
|
|
for ( cmp = 0; cmp < cmpc; cmp++ ) {
|
|
|
|
// create filename
|
|
fn = create_filename( base, ext[ cmp ] );
|
|
|
|
// open file for output
|
|
fp = fopen( fn, "wb" );
|
|
if ( fp == NULL ){
|
|
sprintf( errormessage, FWR_ERRMSG, fn);
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
free( fn );
|
|
|
|
switch ( collmode ) {
|
|
|
|
case 0: // standard collections
|
|
for ( bpos = 0; bpos < 64; bpos++ )
|
|
fwrite( colldata[cmp][bpos], sizeof( short ), cmpnfo[cmp].bc, fp );
|
|
break;
|
|
|
|
case 1: // sequential order collections, 'dhufs'
|
|
for ( dpos = 0; dpos < cmpnfo[cmp].bc; dpos++ )
|
|
for ( bpos = 0; bpos < 64; bpos++ )
|
|
fwrite( &(colldata[cmp][bpos][dpos]), sizeof( short ), 1, fp );
|
|
break;
|
|
|
|
case 2: // square collections
|
|
dpos = 0;
|
|
for ( i = 0; i < 64; ) {
|
|
bpos = zigzag[ i++ ];
|
|
fwrite( &(colldata[cmp][bpos][dpos]), sizeof( short ),
|
|
cmpnfo[cmp].bch, fp );
|
|
if ( ( i % 8 ) == 0 ) {
|
|
dpos += cmpnfo[cmp].bch;
|
|
if ( dpos >= cmpnfo[cmp].bc ) {
|
|
dpos = 0;
|
|
}
|
|
else {
|
|
i -= 8;
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
|
|
case 3: // uncollections
|
|
for ( i = 0; i < ( cmpnfo[cmp].bcv * 8 ); i++ )
|
|
for ( j = 0; j < ( cmpnfo[cmp].bch * 8 ); j++ ) {
|
|
bpos = zigzag[ ( ( i % 8 ) * 8 ) + ( j % 8 ) ];
|
|
dpos = ( ( i / 8 ) * cmpnfo[cmp].bch ) + ( j / 8 );
|
|
fwrite( &(colldata[cmp][bpos][dpos]), sizeof( short ), 1, fp );
|
|
}
|
|
break;
|
|
|
|
case 4: // square collections / alt order (even/uneven)
|
|
dpos = 0;
|
|
for ( i = 0; i < 64; ) {
|
|
bpos = even_zigzag[ i++ ];
|
|
fwrite( &(colldata[cmp][bpos][dpos]), sizeof( short ),
|
|
cmpnfo[cmp].bch, fp );
|
|
if ( ( i % 8 ) == 0 ) {
|
|
dpos += cmpnfo[cmp].bch;
|
|
if ( dpos >= cmpnfo[cmp].bc ) {
|
|
dpos = 0;
|
|
}
|
|
else {
|
|
i -= 8;
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
|
|
case 5: // uncollections / alt order (even/uneven)
|
|
for ( i = 0; i < ( cmpnfo[cmp].bcv * 8 ); i++ )
|
|
for ( j = 0; j < ( cmpnfo[cmp].bch * 8 ); j++ ) {
|
|
bpos = even_zigzag[ ( ( i % 8 ) * 8 ) + ( j % 8 ) ];
|
|
dpos = ( ( i / 8 ) * cmpnfo[cmp].bch ) + ( j / 8 );
|
|
fwrite( &(colldata[cmp][bpos][dpos]), sizeof( short ), 1, fp );
|
|
}
|
|
break;
|
|
}
|
|
|
|
fclose( fp );
|
|
}
|
|
|
|
return true;
|
|
}
|
|
#endif
|
|
|
|
|
|
/* -----------------------------------------------
|
|
Writes zero distribution data to file;
|
|
----------------------------------------------- */
|
|
#if !defined(BUILD_LIB) && defined(DEV_BUILD)
|
|
INTERN bool dump_zdst( void )
|
|
{
|
|
const char* ext[4];
|
|
const char* basename;
|
|
int cmp;
|
|
|
|
|
|
ext[0] = "zdst0";
|
|
ext[1] = "zdst1";
|
|
ext[2] = "zdst2";
|
|
ext[3] = "zdst3";
|
|
basename = filelist[ file_no ];
|
|
|
|
for ( cmp = 0; cmp < cmpc; cmp++ )
|
|
if ( !dump_file( basename, ext[cmp], zdstdata[cmp], 1, cmpnfo[cmp].bc ) )
|
|
return false;
|
|
|
|
|
|
return true;
|
|
}
|
|
#endif
|
|
|
|
|
|
/* -----------------------------------------------
|
|
Writes to file
|
|
----------------------------------------------- */
|
|
#if !defined(BUILD_LIB) && defined(DEV_BUILD)
|
|
INTERN bool dump_file( const char* base, const char* ext, void* data, int bpv, int size )
|
|
{
|
|
FILE* fp;
|
|
char* fn;
|
|
|
|
// create filename
|
|
fn = create_filename( base, ext );
|
|
|
|
// open file for output
|
|
fp = fopen( fn, "wb" );
|
|
if ( fp == NULL ) {
|
|
sprintf( errormessage, FWR_ERRMSG, fn);
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
free( fn );
|
|
|
|
// write & close
|
|
fwrite( data, bpv, size, fp );
|
|
fclose( fp );
|
|
|
|
return true;
|
|
}
|
|
#endif
|
|
|
|
|
|
/* -----------------------------------------------
|
|
Writes error info file
|
|
----------------------------------------------- */
|
|
#if !defined(BUILD_LIB) && defined(DEV_BUILD)
|
|
INTERN bool dump_errfile( void )
|
|
{
|
|
FILE* fp;
|
|
char* fn;
|
|
|
|
|
|
// return immediately if theres no error
|
|
if ( errorlevel == 0 ) return true;
|
|
|
|
// create filename based on errorlevel
|
|
if ( errorlevel == 1 ) {
|
|
fn = create_filename( filelist[ file_no ], "wrn.nfo" );
|
|
}
|
|
else {
|
|
fn = create_filename( filelist[ file_no ], "err.nfo" );
|
|
}
|
|
|
|
// open file for output
|
|
fp = fopen( fn, "w" );
|
|
if ( fp == NULL ){
|
|
sprintf( errormessage, FWR_ERRMSG, fn);
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
free( fn );
|
|
|
|
// write status and errormessage to file
|
|
fprintf( fp, "--> error (level %i) in file \"%s\" <--\n", errorlevel, filelist[ file_no ] );
|
|
fprintf( fp, "\n" );
|
|
// write error specification to file
|
|
fprintf( fp, " %s -> %s:\n", get_status( errorfunction ),
|
|
( errorlevel == 1 ) ? "warning" : "error" );
|
|
fprintf( fp, " %s\n", errormessage );
|
|
|
|
// done, close file
|
|
fclose( fp );
|
|
|
|
|
|
return true;
|
|
}
|
|
#endif
|
|
|
|
|
|
/* -----------------------------------------------
|
|
Writes info to textfile
|
|
----------------------------------------------- */
|
|
#if !defined(BUILD_LIB) && defined(DEV_BUILD)
|
|
INTERN bool dump_info( void )
|
|
{
|
|
FILE* fp;
|
|
char* fn;
|
|
|
|
unsigned char type = 0x00; // type of current marker segment
|
|
unsigned int len = 0; // length of current marker segment
|
|
unsigned int hpos = 0; // position in header
|
|
|
|
int cmp, bpos;
|
|
int i;
|
|
|
|
|
|
// create filename
|
|
fn = create_filename( filelist[ file_no ], "nfo" );
|
|
|
|
// open file for output
|
|
fp = fopen( fn, "w" );
|
|
if ( fp == NULL ){
|
|
sprintf( errormessage, FWR_ERRMSG, fn);
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
free( fn );
|
|
|
|
// info about image
|
|
fprintf( fp, "<Infofile for JPEG image %s>\n\n\n", jpgfilename );
|
|
fprintf( fp, "coding process: %s\n", ( jpegtype == 1 ) ? "sequential" : "progressive" );
|
|
// fprintf( fp, "no of scans: %i\n", scnc );
|
|
fprintf( fp, "imageheight: %i / imagewidth: %i\n", imgheight, imgwidth );
|
|
fprintf( fp, "component count: %i\n", cmpc );
|
|
fprintf( fp, "mcu count: %i/%i/%i (all/v/h)\n\n", mcuc, mcuv, mcuh );
|
|
|
|
// info about header
|
|
fprintf( fp, "\nfile header structure:\n" );
|
|
fprintf( fp, " type length hpos\n" );
|
|
// header parser loop
|
|
for ( hpos = 0; (int) hpos < hdrs; hpos += len ) {
|
|
type = hdrdata[ hpos + 1 ];
|
|
len = 2 + B_SHORT( hdrdata[ hpos + 2 ], hdrdata[ hpos + 3 ] );
|
|
fprintf( fp, " FF%2X %6i %6i\n", type, len, hpos );
|
|
}
|
|
fprintf( fp, " _END 0 %6i\n", hpos );
|
|
fprintf( fp, "\n" );
|
|
|
|
// info about compression settings
|
|
fprintf( fp, "\ncompression settings:\n" );
|
|
fprintf( fp, " no of segments -> %3i[0] %3i[1] %3i[2] %3i[3]\n",
|
|
segm_cnt[0], segm_cnt[1], segm_cnt[2], segm_cnt[3] );
|
|
fprintf( fp, " noise threshold -> %3i[0] %3i[1] %3i[2] %3i[3]\n",
|
|
nois_trs[0], nois_trs[1], nois_trs[2], nois_trs[3] );
|
|
fprintf( fp, "\n" );
|
|
|
|
// info about components
|
|
for ( cmp = 0; cmp < cmpc; cmp++ ) {
|
|
fprintf( fp, "\n" );
|
|
fprintf( fp, "component number %i ->\n", cmp );
|
|
fprintf( fp, "sample factors: %i/%i (v/h)\n", cmpnfo[cmp].sfv, cmpnfo[cmp].sfh );
|
|
fprintf( fp, "blocks per mcu: %i\n", cmpnfo[cmp].mbs );
|
|
fprintf( fp, "block count (mcu): %i/%i/%i (all/v/h)\n",
|
|
cmpnfo[cmp].bc, cmpnfo[cmp].bcv, cmpnfo[cmp].bch );
|
|
fprintf( fp, "block count (sng): %i/%i/%i (all/v/h)\n",
|
|
cmpnfo[cmp].nc, cmpnfo[cmp].ncv, cmpnfo[cmp].nch );
|
|
fprintf( fp, "quantiser table ->" );
|
|
for ( i = 0; i < 64; i++ ) {
|
|
bpos = zigzag[ i ];
|
|
if ( ( i % 8 ) == 0 ) fprintf( fp, "\n" );
|
|
fprintf( fp, "%4i, ", QUANT( cmp, bpos ) );
|
|
}
|
|
fprintf( fp, "\n" );
|
|
fprintf( fp, "maximum values ->" );
|
|
for ( i = 0; i < 64; i++ ) {
|
|
bpos = zigzag[ i ];
|
|
if ( ( i % 8 ) == 0 ) fprintf( fp, "\n" );
|
|
fprintf( fp, "%4i, ", MAX_V( cmp, bpos ) );
|
|
}
|
|
fprintf( fp, "\n\n" );
|
|
}
|
|
|
|
|
|
fclose( fp );
|
|
|
|
|
|
return true;
|
|
}
|
|
#endif
|
|
|
|
|
|
/* -----------------------------------------------
|
|
Writes distribution for use in valdist.h
|
|
----------------------------------------------- */
|
|
#if !defined(BUILD_LIB) && defined(DEV_BUILD)
|
|
INTERN bool dump_dist( void )
|
|
{
|
|
FILE* fp;
|
|
char* fn;
|
|
|
|
unsigned int dist[ 1024 + 1 ];
|
|
int cmp, bpos, dpos;
|
|
int i;
|
|
|
|
|
|
// create filename
|
|
fn = create_filename( filelist[ file_no ], "dist" );
|
|
|
|
// open file for output
|
|
fp = fopen( fn, "wb" );
|
|
free( fn );
|
|
if ( fp == NULL ){
|
|
sprintf( errormessage, FWR_ERRMSG, fn);
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
|
|
// calculate & write distributions for each frequency
|
|
for ( cmp = 0; cmp < cmpc; cmp++ )
|
|
for ( bpos = 0; bpos < 64; bpos++ ) {
|
|
// preset dist with zeroes
|
|
for ( i = 0; i <= 1024; i++ ) dist[ i ] = 0;
|
|
// get distribution
|
|
for ( dpos = 0; dpos < cmpnfo[cmp].bc; dpos++ )
|
|
dist[ ABS( colldata[cmp][bpos][dpos] ) ]++;
|
|
// write to file
|
|
fwrite( dist, sizeof( int ), 1024 + 1, fp );
|
|
}
|
|
|
|
|
|
// close file
|
|
fclose( fp );
|
|
|
|
return true;
|
|
}
|
|
#endif
|
|
|
|
|
|
/* -----------------------------------------------
|
|
Do inverse DCT and write pgms
|
|
----------------------------------------------- */
|
|
#if !defined(BUILD_LIB) && defined(DEV_BUILD)
|
|
INTERN bool dump_pgm( void )
|
|
{
|
|
unsigned char* imgdata;
|
|
|
|
FILE* fp;
|
|
char* fn;
|
|
const char* ext[4];
|
|
|
|
int cmp, dpos;
|
|
int pix_v;
|
|
int xpos, ypos, dcpos;
|
|
int x, y;
|
|
|
|
|
|
ext[0] = "cmp0.pgm";
|
|
ext[1] = "cmp1.pgm";
|
|
ext[2] = "cmp2.pgm";
|
|
ext[3] = "cmp3.pgm";
|
|
|
|
|
|
for ( cmp = 0; cmp < cmpc; cmp++ )
|
|
{
|
|
// create filename
|
|
fn = create_filename( filelist[ file_no ], ext[ cmp ] );
|
|
|
|
// open file for output
|
|
fp = fopen( fn, "wb" );
|
|
if ( fp == NULL ){
|
|
sprintf( errormessage, FWR_ERRMSG, fn );
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
free( fn );
|
|
|
|
// alloc memory for image data
|
|
imgdata = (unsigned char*) calloc ( cmpnfo[cmp].bc * 64, sizeof( char ) );
|
|
if ( imgdata == NULL ) {
|
|
sprintf( errormessage, MEM_ERRMSG );
|
|
errorlevel = 2;
|
|
return false;
|
|
}
|
|
|
|
for ( dpos = 0; dpos < cmpnfo[cmp].bc; dpos++ ) {
|
|
// do inverse DCT, store in imgdata
|
|
dcpos = ( ( ( dpos / cmpnfo[cmp].bch ) * cmpnfo[cmp].bch ) << 6 ) +
|
|
( ( dpos % cmpnfo[cmp].bch ) << 3 );
|
|
for ( y = 0; y < 8; y++ ) {
|
|
ypos = dcpos + ( y * ( cmpnfo[cmp].bch << 3 ) );
|
|
for ( x = 0; x < 8; x++ ) {
|
|
xpos = ypos + x;
|
|
pix_v = idct_2d_fst_8x8( cmp, dpos, x, y );
|
|
pix_v = DCT_RESCALE( pix_v );
|
|
pix_v = pix_v + 128;
|
|
imgdata[ xpos ] = ( unsigned char ) CLAMPED( 0, 255, pix_v );
|
|
}
|
|
}
|
|
}
|
|
|
|
// write PGM header
|
|
fprintf( fp, "P5\n" );
|
|
fprintf( fp, "# created by %s v%i.%i%s (%s) by %s\n",
|
|
apptitle, appversion / 10, appversion % 10, subversion, versiondate, author );
|
|
fprintf( fp, "%i %i\n", cmpnfo[cmp].bch * 8, cmpnfo[cmp].bcv * 8 );
|
|
fprintf( fp, "255\n" );
|
|
|
|
// write image data
|
|
fwrite( imgdata, sizeof( char ), cmpnfo[cmp].bc * 64, fp );
|
|
|
|
// free memory
|
|
free( imgdata );
|
|
|
|
// close file
|
|
fclose( fp );
|
|
}
|
|
|
|
return true;
|
|
}
|
|
#endif
|
|
|
|
/* ----------------------- End of developers functions -------------------------- */
|
|
|
|
/* ----------------------- End of file -------------------------- */
|