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Update bundled libs to current versions

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- update README.bundled-libs.txt + some comments
- update bundled jpeg lib from version 9c to 9d

All bundled libs are now up-to-date. For current update status
please see README.bundled-libs.txt.
This commit is contained in:
Albrecht Schlosser 2021-02-25 15:27:01 +01:00
parent 5bd467fa17
commit 52e16fb1be
34 changed files with 865 additions and 694 deletions
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53
README.bundled-libs.txt
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@ -1,44 +1,41 @@
README.bundled-libs.txt - Developer information for bundled libraries
---------------------------------------------------------------------
******************************************************
*** NOTICE *** This file is still work in progress ***
******************************************************
This file is mainly intended for FLTK developers and contains information
about the current versions of all bundled libraries and about how to
upgrade these bundled libraries.
Current versions of bundled libraries:
** work in progress -- not yet completely upgraded **
Current versions of bundled libraries (as of Feb 25, 2021):
Library Version Release date FLTK Version
--------------------------------------------------------------------------
jpeg jpeg-9c 2018-01-14 1.4.0
jpeg jpeg-9d 2020-01-12 1.4.0
nanosvg a1eea27b3d [1] 2021-02-21 1.4.0
png libpng-1.6.37 2019-04-14 1.4.0
zlib zlib-1.2.11 2017-01-15 1.4.0
--------------------------------------------------------------------------
Previous versions of bundled libraries:
Library Version Release date FLTK Version
------------------------------------------------------------------
nanosvg f31098fa85 [1] 2019-05-23 1.4.x
jpeg jpeg-9a 2014-01-19 1.3.5
png libpng-1.6.16 2014-12-22 1.3.5
zlib zlib-1.2.8 2013-04-28 1.3.5
jpeg jpeg-9d 2020-01-12 1.3.6
png libpng-1.6.37 2019-04-14 1.3.6
zlib zlib-1.2.11 2017-01-15 1.3.6
--------------------------------------------------------------------------
[1] Git commit in: https://github.com/fltk/nanosvg
See also git tag 'fltk_yyyy-mm-dd' where yyyy-mm-dd == "Release date"
and file nanosvg/README.txt.
General information:
FLTK does not include the entire library distributions. We only provide
the source files necessary to build the library itself. There are no
test programs or other contributed files.
FLTK does not include the entire library distributions. We only provide the
source files necessary to build the FLTK library and some README and/or
CHANGELOG files. There are no test programs or other contributed files.
We use our own build files, hence a few files MUST NOT be upgraded when
the library source files are upgraded. We strive to keep changes to the
@ -46,11 +43,11 @@ General information:
work with FLTK should be a rare exception.
If patches are necessary all changes in the library files should be
marked with "FLTK" in a comment so a developer that upgrades the library
marked with "FLTK" in a comment so a developer who upgrades the library
later is aware of changes in the source code for FLTK. Additional comments
should be added to show the rationale, i.e. why a particular change was
necessary. If applicable, add a reference to a Software Trouble Report
like "STR 3456", "Issue #123", or "PR #234".
necessary. If applicable, add a reference to a Software Trouble Report,
GitHub Issue or PR like "STR 3456", "Issue #123", or "PR #234".
How to update the bundled libraries:
@ -62,8 +59,8 @@ How to update the bundled libraries:
Some config header files may be pre-generated in the FLTK sources. These
header files should be left untouched, but it may be necessary to update
them if new items were added to the new library version. In this case
the new header should be pre-generated on a Linux system with default
these files if new items were added to the new library version. In this
case the new header should be pre-generated on a Linux system with default
options unless otherwise mentioned below for a specific library.
Currently there are no known exceptions.
@ -113,7 +110,7 @@ Upgrade notes for specific libraries:
zlib:
Website: http://zlib.net/
Website: https://zlib.net/
Download: See website and follow links.
Repository: git clone https://github.com/madler/zlib.git
@ -159,7 +156,7 @@ png:
jpeg:
Website: http://ijg.org/
Website: https://ijg.org/
Download: See website and follow links.
Repository: <unknown>
@ -182,11 +179,11 @@ nanosvg:
Website: https://github.com/memononen/nanosvg
Download: See website and follow links.
Repository: git clone https://github.com/memononen/nanosvg.git
FLTK Clone: git clone https://github.com/fltk/nanosvg.git
FLTK Fork: git clone https://github.com/fltk/nanosvg.git
FLTK has its own GitHub clone of the original repository (see above).
FLTK has its own GitHub fork of the original repository (see above).
The intention is to update this clone from time to time so the FLTK
The intention is to update this fork from time to time so the FLTK
specific patches are up-to-date with the original library. Hopefully
the FLTK patches will be accepted upstream at some time in the future
so we no longer need our own patches.
@ -195,7 +192,7 @@ nanosvg:
Update (Feb 22, 2021): The upstream library is officially no longer
maintained (see README.md) although updates appear from time to time.
Use this clone (branch 'fltk') to get the nanosvg library with FLTK
Use this fork (branch 'fltk') to get the nanosvg library with FLTK
specific patches:
$ git clone https://github.com/fltk/nanosvg.git nanosvg-fltk
@ -209,5 +206,5 @@ nanosvg:
The following files need special handling:
nanosvg.h: Merge or download from FLTK's clone (see above).
nanosvgrast.h: Merge or download from FLTK's clone (see above).
nanosvg.h: Merge or download from FLTK's fork (see above).
nanosvgrast.h: Merge or download from FLTK's fork (see above).

19
jpeg/README
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@ -1,7 +1,7 @@
The Independent JPEG Group's JPEG software
==========================================
README for release 9c of 14-Jan-2018
README for release 9d of 12-Jan-2020
====================================
This distribution contains the ninth public release of the Independent JPEG
@ -10,8 +10,8 @@ to use it for any purpose, subject to the conditions under LEGAL ISSUES, below.
This software is the work of Tom Lane, Guido Vollbeding, Philip Gladstone,
Bill Allombert, Jim Boucher, Lee Crocker, Bob Friesenhahn, Ben Jackson,
Julian Minguillon, Luis Ortiz, George Phillips, Davide Rossi, Ge' Weijers,
and other members of the Independent JPEG Group.
John Korejwa, Julian Minguillon, Luis Ortiz, George Phillips, Davide Rossi,
Ge' Weijers, and other members of the Independent JPEG Group.
IJG is not affiliated with the ISO/IEC JTC1/SC29/WG1 standards committee
(previously known as JPEG, together with ITU-T SG16).
@ -115,7 +115,7 @@ with respect to this software, its quality, accuracy, merchantability, or
fitness for a particular purpose. This software is provided "AS IS", and you,
its user, assume the entire risk as to its quality and accuracy.
This software is copyright (C) 1991-2018, Thomas G. Lane, Guido Vollbeding.
This software is copyright (C) 1991-2020, Thomas G. Lane, Guido Vollbeding.
All Rights Reserved except as specified below.
Permission is hereby granted to use, copy, modify, and distribute this
@ -152,13 +152,6 @@ The same holds for its supporting scripts (config.guess, config.sub,
ltmain.sh). Another support script, install-sh, is copyright by X Consortium
but is also freely distributable.
The IJG distribution formerly included code to read and write GIF files.
To avoid entanglement with the Unisys LZW patent (now expired), GIF reading
support has been removed altogether, and the GIF writer has been simplified
to produce "uncompressed GIFs". This technique does not use the LZW
algorithm; the resulting GIF files are larger than usual, but are readable
by all standard GIF decoders.
REFERENCES
==========
@ -246,8 +239,8 @@ ARCHIVE LOCATIONS
The "official" archive site for this software is www.ijg.org.
The most recent released version can always be found there in
directory "files". This particular version will be archived as
http://www.ijg.org/files/jpegsrc.v9c.tar.gz, and in Windows-compatible
"zip" archive format as http://www.ijg.org/files/jpegsr9c.zip.
http://www.ijg.org/files/jpegsrc.v9d.tar.gz, and in Windows-compatible
"zip" archive format as http://www.ijg.org/files/jpegsr9d.zip.
The JPEG FAQ (Frequently Asked Questions) article is a source of some
general information about JPEG.

49
jpeg/change.log
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@ -1,6 +1,55 @@
CHANGE LOG for Independent JPEG Group's JPEG software
Version 9d 12-Jan-2020
-----------------------
Optimize the optimal Huffman code table generation to produce
slightly smaller files. Thank to John Korejwa for suggestion.
Note: Requires rebuild of testimgp.jpg.
Decoding Huffman: Use default tables if tables are not defined.
Thank to Simone Azzalin for report (Motion JPEG),
and to Martin Strunz for hint.
Add sanity check in optimal Huffman code table generation.
Thank to Adam Farley for suggestion.
rdtarga.c: use read_byte(), with EOF check, instead of getc()
in read_*_pixel().
Thank to Chijin Zhou for cjpeg potential vulnerability report.
jmemnobs.c: respect the max_memory_to_use setting in
jpeg_mem_available() computation. Thank to Sheng Shu and
Dongdong She for djpeg potential vulnerability report.
jdarith.c, jdhuff.c: avoid left shift of negative value
compiler warning in decode_mcu_AC_refine().
Thank to Indu Bhagat for suggestion.
Add x64 (64-bit) platform support, avoid compiler warnings.
Thank to Jonathan Potter, Feiyun Wang, and Sheng Shu for suggestion.
Adjust libjpeg version specification for pkg-config file.
Thank to Chen Chen for suggestion.
Restore GIF read and write support from libjpeg version 6a.
Thank to Wolfgang Werner (W.W.) Heinz for suggestion.
Improve consistency in raw (downsampled) image data processing mode.
Thank to Zhongyuan Zhou for hint.
Avoid out of bounds array read (AC derived table pointers)
in start pass in jdhuff.c. Thank to Peng Li for report.
Improve code sanity (jdhuff.c).
Thank to Reza Mirzazade farkhani for reports.
Add jpegtran -drop option; add options to the crop extension and wipe
to fill the extra area with content from the source image region,
instead of gray out.
Version 9c 14-Jan-2018
-----------------------

6
jpeg/filelist.txt
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@ -1,6 +1,6 @@
IJG JPEG LIBRARY: FILE LIST
Copyright (C) 1994-2017, Thomas G. Lane, Guido Vollbeding.
Copyright (C) 1994-2019, Thomas G. Lane, Guido Vollbeding.
This file is part of the Independent JPEG Group's software.
For conditions of distribution and use, see the accompanying README file.
@ -151,7 +151,7 @@ transupp.c Support code for jpegtran: lossless image manipulations.
Image file reader modules for cjpeg:
rdbmp.c BMP file input.
rdgif.c GIF file input (now just a stub).
rdgif.c GIF file input.
rdppm.c PPM/PGM file input.
rdrle.c Utah RLE file input.
rdtarga.c Targa file input.
@ -159,7 +159,7 @@ rdtarga.c Targa file input.
Image file writer modules for djpeg:
wrbmp.c BMP file output.
wrgif.c GIF file output (a mere shadow of its former self).
wrgif.c GIF file output.
wrppm.c PPM/PGM file output.
wrrle.c Utah RLE file output.
wrtarga.c Targa file output.

54
jpeg/install.txt
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@ -1,6 +1,6 @@
INSTALLATION INSTRUCTIONS for the Independent JPEG Group's JPEG software
Copyright (C) 1991-2017, Thomas G. Lane, Guido Vollbeding.
Copyright (C) 1991-2019, Thomas G. Lane, Guido Vollbeding.
This file is part of the Independent JPEG Group's software.
For conditions of distribution and use, see the accompanying README file.
@ -150,8 +150,8 @@ makefile.wat jconfig.wat MS-DOS, OS/2, or Windows NT, Watcom C
makefile.vc jconfig.vc Windows, MS Visual C++
makefile.vs jconfig.vc Windows, MS Visual C++ 6 Developer Studio
make*.vc6
makefile.vs jconfig.vc Windows, Visual Studio 2017 (v15)
make*.v15
makefile.vs jconfig.vc Windows, Visual Studio 2019 (v16)
make*.v16
makefile.b32 jconfig.vc Windows, Borland C++ 32-bit (bcc32)
makefile.mms jconfig.vms Digital VMS, with MMS software
makefile.vms jconfig.vms Digital VMS, without MMS software
@ -1029,48 +1029,66 @@ library, we recommend building the applications so that you can run the
self-test.)
To use:
1. Open the command prompt, change to the main directory and execute the
command line
1. Open the command prompt, change to the source directory and execute
the command line
NMAKE /f makefile.vs setup-vc6
If you get an error message saying that the "NMAKE" command could
not be found, execute the command
"%ProgramFiles%\Microsoft Visual Studio\VC98\Bin\VCVARS32"
to set the environment for using Microsoft Visual C++ tools,
and repeat the NMAKE call.
This will move jconfig.vc to jconfig.h and makefiles to project files.
(Note that the renaming is critical!)
Alternatively you can use
NMAKE /f makefile.vs setupcopy-vc6
This will create renamed copies of the files, which allows to repeat
the setup later.
2. Open the workspace file jpeg.dsw, build the library project.
(If you are using Developer Studio more recent than 6.0, you'll
probably get a message saying that the project files are being updated.)
3. Open the workspace file apps.dsw, build the application projects.
4. To perform the self-test, execute the command line
NMAKE /f makefile.vs test-build
5. Move the application .exe files from `app`\Release to an
5. Move the application .exe files from the Release folder to an
appropriate location on your path.
Microsoft Windows, Visual Studio 2017 (v15):
Microsoft Windows, Visual Studio 2019 (v16):
We include makefiles that should work as project files in Visual Studio
2017 (v15) or later. There is a library makefile that builds the IJG
library as a static Win32 library, and application makefiles that build
the sample applications as Win32 console applications. (Even if you only
want the library, we recommend building the applications so that you can
run the self-test.)
2019 (v16) or later. There is a library makefile that builds the IJG
library as a static Win32/x64 library, and application makefiles that
build the sample applications as Win32/x64 console applications. (Even
if you only want the library, we recommend building the applications so
that you can run the self-test.)
To use:
1. Open the Developer Command Prompt, change to the main directory and
execute the command line
NMAKE /f makefile.vs setup-v15
1. Open the Developer Command Prompt for VS 2019, change to the source
directory and execute the command line
NMAKE /f makefile.vs setup-v16
This will move jconfig.vc to jconfig.h and makefiles to project files.
(Note that the renaming is critical!)
Alternatively you can use
NMAKE /f makefile.vs setupcopy-v16
This will create renamed copies of the files, which allows to repeat
the setup later.
2. Open the solution file jpeg.sln, build the library project.
a) If you are using Visual Studio more recent than
2017 (v15), you'll probably get a message saying
2019 (v16), you'll probably get a message saying
that the project files are being updated.
b) If necessary, open the project properties and
adapt the Windows Target Platform Version in
the Configuration Properties, General section;
we support the latest version at the time of release.
c) If you want to build x64 code, change the platform setting from
Win32 to x64. You can build Win32 and x64 versions side by side.
3. Open the solution file apps.sln, build the application projects.
4. To perform the self-test, execute the command line
NMAKE /f makefile.vs test-build
5. Move the application .exe files from `app`\Release to an
NMAKE /f makefile.vs test-32
for the Win32 build, or on a 64-bit system
NMAKE /f makefile.vs test-64
for the x64 build.
5. Move the application .exe files from the Release folder to an
appropriate location on your path.

17
jpeg/jcarith.c
View File

@ -1,7 +1,7 @@
/*
* jcarith.c
*
* Developed 1997-2013 by Guido Vollbeding.
* Developed 1997-2019 by Guido Vollbeding.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
@ -181,11 +181,11 @@ finish_pass (j_compress_ptr cinfo)
if (e->zc) /* output final pending zero bytes */
do emit_byte(0x00, cinfo);
while (--e->zc);
emit_byte((e->c >> 19) & 0xFF, cinfo);
emit_byte((int) ((e->c >> 19) & 0xFF), cinfo);
if (((e->c >> 19) & 0xFF) == 0xFF)
emit_byte(0x00, cinfo);
if (e->c & 0x7F800L) {
emit_byte((e->c >> 11) & 0xFF, cinfo);
emit_byte((int) ((e->c >> 11) & 0xFF), cinfo);
if (((e->c >> 11) & 0xFF) == 0xFF)
emit_byte(0x00, cinfo);
}
@ -280,7 +280,8 @@ arith_encode (j_compress_ptr cinfo, unsigned char *st, int val)
/* Note: The 3 spacer bits in the C register guarantee
* that the new buffer byte can't be 0xFF here
* (see page 160 in the P&M JPEG book). */
e->buffer = temp & 0xFF; /* new output byte, might overflow later */
/* New output byte, might overflow later */
e->buffer = (int) (temp & 0xFF);
} else if (temp == 0xFF) {
++e->sc; /* stack 0xFF byte (which might overflow later) */
} else {
@ -302,7 +303,8 @@ arith_encode (j_compress_ptr cinfo, unsigned char *st, int val)
emit_byte(0x00, cinfo);
} while (--e->sc);
}
e->buffer = temp & 0xFF; /* new output byte (can still overflow) */
/* New output byte (can still overflow) */
e->buffer = (int) (temp & 0xFF);
}
e->c &= 0x7FFFFL;
e->ct += 8;
@ -926,9 +928,8 @@ jinit_arith_encoder (j_compress_ptr cinfo)
arith_entropy_ptr entropy;
int i;
entropy = (arith_entropy_ptr)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
SIZEOF(arith_entropy_encoder));
entropy = (arith_entropy_ptr) (*cinfo->mem->alloc_small)
((j_common_ptr) cinfo, JPOOL_IMAGE, SIZEOF(arith_entropy_encoder));
cinfo->entropy = &entropy->pub;
entropy->pub.start_pass = start_pass;
entropy->pub.finish_pass = finish_pass;

79
jpeg/jccolor.c
View File

@ -2,7 +2,7 @@
* jccolor.c
*
* Copyright (C) 1991-1996, Thomas G. Lane.
* Modified 2011-2013 by Guido Vollbeding.
* Modified 2011-2019 by Guido Vollbeding.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
@ -105,14 +105,14 @@ rgb_ycc_start (j_compress_ptr cinfo)
/* Allocate and fill in the conversion tables. */
cconvert->rgb_ycc_tab = rgb_ycc_tab = (INT32 *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
(TABLE_SIZE * SIZEOF(INT32)));
TABLE_SIZE * SIZEOF(INT32));
for (i = 0; i <= MAXJSAMPLE; i++) {
rgb_ycc_tab[i+R_Y_OFF] = FIX(0.299) * i;
rgb_ycc_tab[i+G_Y_OFF] = FIX(0.587) * i;
rgb_ycc_tab[i+B_Y_OFF] = FIX(0.114) * i + ONE_HALF;
rgb_ycc_tab[i+R_CB_OFF] = (-FIX(0.168735892)) * i;
rgb_ycc_tab[i+G_CB_OFF] = (-FIX(0.331264108)) * i;
rgb_ycc_tab[i+R_CB_OFF] = (- FIX(0.168735892)) * i;
rgb_ycc_tab[i+G_CB_OFF] = (- FIX(0.331264108)) * i;
/* We use a rounding fudge-factor of 0.5-epsilon for Cb and Cr.
* This ensures that the maximum output will round to MAXJSAMPLE
* not MAXJSAMPLE+1, and thus that we don't have to range-limit.
@ -121,8 +121,8 @@ rgb_ycc_start (j_compress_ptr cinfo)
/* B=>Cb and R=>Cr tables are the same
rgb_ycc_tab[i+R_CR_OFF] = FIX(0.5) * i + CBCR_OFFSET + ONE_HALF-1;
*/
rgb_ycc_tab[i+G_CR_OFF] = (-FIX(0.418687589)) * i;
rgb_ycc_tab[i+B_CR_OFF] = (-FIX(0.081312411)) * i;
rgb_ycc_tab[i+G_CR_OFF] = (- FIX(0.418687589)) * i;
rgb_ycc_tab[i+B_CR_OFF] = (- FIX(0.081312411)) * i;
}
}
@ -131,12 +131,12 @@ rgb_ycc_start (j_compress_ptr cinfo)
* Convert some rows of samples to the JPEG colorspace.
*
* Note that we change from the application's interleaved-pixel format
* to our internal noninterleaved, one-plane-per-component format.
* The input buffer is therefore three times as wide as the output buffer.
* to our internal noninterleaved, one-plane-per-component format. The
* input buffer is therefore three times as wide as the output buffer.
*
* A starting row offset is provided only for the output buffer. The caller
* can easily adjust the passed input_buf value to accommodate any row
* offset required on that side.
* A starting row offset is provided only for the output buffer. The
* caller can easily adjust the passed input_buf value to accommodate
* any row offset required on that side.
*/
METHODDEF(void)
@ -145,8 +145,8 @@ rgb_ycc_convert (j_compress_ptr cinfo,
JDIMENSION output_row, int num_rows)
{
my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert;
register INT32 * ctab = cconvert->rgb_ycc_tab;
register int r, g, b;
register INT32 * ctab = cconvert->rgb_ycc_tab;
register JSAMPROW inptr;
register JSAMPROW outptr0, outptr1, outptr2;
register JDIMENSION col;
@ -162,6 +162,7 @@ rgb_ycc_convert (j_compress_ptr cinfo,
r = GETJSAMPLE(inptr[RGB_RED]);
g = GETJSAMPLE(inptr[RGB_GREEN]);
b = GETJSAMPLE(inptr[RGB_BLUE]);
inptr += RGB_PIXELSIZE;
/* If the inputs are 0..MAXJSAMPLE, the outputs of these equations
* must be too; we do not need an explicit range-limiting operation.
* Hence the value being shifted is never negative, and we don't
@ -179,7 +180,6 @@ rgb_ycc_convert (j_compress_ptr cinfo,
outptr2[col] = (JSAMPLE)
((ctab[r+R_CR_OFF] + ctab[g+G_CR_OFF] + ctab[b+B_CR_OFF])
>> SCALEBITS);
inptr += RGB_PIXELSIZE;
}
}
}
@ -201,8 +201,8 @@ rgb_gray_convert (j_compress_ptr cinfo,
JDIMENSION output_row, int num_rows)
{
my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert;
register INT32 * ctab = cconvert->rgb_ycc_tab;
register int r, g, b;
register INT32 * ctab = cconvert->rgb_ycc_tab;
register JSAMPROW inptr;
register JSAMPROW outptr;
register JDIMENSION col;
@ -215,11 +215,11 @@ rgb_gray_convert (j_compress_ptr cinfo,
r = GETJSAMPLE(inptr[RGB_RED]);
g = GETJSAMPLE(inptr[RGB_GREEN]);
b = GETJSAMPLE(inptr[RGB_BLUE]);
inptr += RGB_PIXELSIZE;
/* Y */
outptr[col] = (JSAMPLE)
((ctab[r+R_Y_OFF] + ctab[g+G_Y_OFF] + ctab[b+B_Y_OFF])
>> SCALEBITS);
inptr += RGB_PIXELSIZE;
}
}
}
@ -228,8 +228,8 @@ rgb_gray_convert (j_compress_ptr cinfo,
/*
* Convert some rows of samples to the JPEG colorspace.
* This version handles Adobe-style CMYK->YCCK conversion,
* where we convert R=1-C, G=1-M, and B=1-Y to YCbCr using the same
* conversion as above, while passing K (black) unchanged.
* where we convert R=1-C, G=1-M, and B=1-Y to YCbCr using the
* same conversion as above, while passing K (black) unchanged.
* We assume rgb_ycc_start has been called.
*/
@ -239,8 +239,8 @@ cmyk_ycck_convert (j_compress_ptr cinfo,
JDIMENSION output_row, int num_rows)
{
my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert;
register INT32 * ctab = cconvert->rgb_ycc_tab;
register int r, g, b;
register INT32 * ctab = cconvert->rgb_ycc_tab;
register JSAMPROW inptr;
register JSAMPROW outptr0, outptr1, outptr2, outptr3;
register JDIMENSION col;
@ -259,6 +259,7 @@ cmyk_ycck_convert (j_compress_ptr cinfo,
b = MAXJSAMPLE - GETJSAMPLE(inptr[2]);
/* K passes through as-is */
outptr3[col] = inptr[3]; /* don't need GETJSAMPLE here */
inptr += 4;
/* If the inputs are 0..MAXJSAMPLE, the outputs of these equations
* must be too; we do not need an explicit range-limiting operation.
* Hence the value being shifted is never negative, and we don't
@ -276,7 +277,6 @@ cmyk_ycck_convert (j_compress_ptr cinfo,
outptr2[col] = (JSAMPLE)
((ctab[r+R_CR_OFF] + ctab[g+G_CR_OFF] + ctab[b+B_CR_OFF])
>> SCALEBITS);
inptr += 4;
}
}
}
@ -312,13 +312,13 @@ rgb_rgb1_convert (j_compress_ptr cinfo,
r = GETJSAMPLE(inptr[RGB_RED]);
g = GETJSAMPLE(inptr[RGB_GREEN]);
b = GETJSAMPLE(inptr[RGB_BLUE]);
inptr += RGB_PIXELSIZE;
/* Assume that MAXJSAMPLE+1 is a power of 2, so that the MOD
* (modulo) operator is equivalent to the bitmask operator AND.
*/
outptr0[col] = (JSAMPLE) ((r - g + CENTERJSAMPLE) & MAXJSAMPLE);
outptr1[col] = (JSAMPLE) g;
outptr2[col] = (JSAMPLE) ((b - g + CENTERJSAMPLE) & MAXJSAMPLE);
inptr += RGB_PIXELSIZE;
}
}
}
@ -335,17 +335,17 @@ grayscale_convert (j_compress_ptr cinfo,
JSAMPARRAY input_buf, JSAMPIMAGE output_buf,
JDIMENSION output_row, int num_rows)
{
int instride = cinfo->input_components;
register JSAMPROW inptr;
register JSAMPROW outptr;
register JDIMENSION col;
register JDIMENSION count;
register int instride = cinfo->input_components;
JDIMENSION num_cols = cinfo->image_width;
while (--num_rows >= 0) {
inptr = *input_buf++;
outptr = output_buf[0][output_row++];
for (col = 0; col < num_cols; col++) {
outptr[col] = inptr[0]; /* don't need GETJSAMPLE() here */
for (count = num_cols; count > 0; count--) {
*outptr++ = *inptr; /* don't need GETJSAMPLE() here */
inptr += instride;
}
}
@ -396,21 +396,21 @@ null_convert (j_compress_ptr cinfo,
JSAMPARRAY input_buf, JSAMPIMAGE output_buf,
JDIMENSION output_row, int num_rows)
{
int ci;
register int nc = cinfo->num_components;
register JSAMPROW inptr;
register JSAMPROW outptr;
register JDIMENSION col;
register JDIMENSION count;
register int num_comps = cinfo->num_components;
JDIMENSION num_cols = cinfo->image_width;
int ci;
while (--num_rows >= 0) {
/* It seems fastest to make a separate pass for each component. */
for (ci = 0; ci < nc; ci++) {
for (ci = 0; ci < num_comps; ci++) {
inptr = input_buf[0] + ci;
outptr = output_buf[ci][output_row];
for (col = 0; col < num_cols; col++) {
for (count = num_cols; count > 0; count--) {
*outptr++ = *inptr; /* don't need GETJSAMPLE() here */
inptr += nc;
inptr += num_comps;
}
}
input_buf++;
@ -439,9 +439,8 @@ jinit_color_converter (j_compress_ptr cinfo)
{
my_cconvert_ptr cconvert;
cconvert = (my_cconvert_ptr)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
SIZEOF(my_color_converter));
cconvert = (my_cconvert_ptr) (*cinfo->mem->alloc_small)
((j_common_ptr) cinfo, JPOOL_IMAGE, SIZEOF(my_color_converter));
cinfo->cconvert = &cconvert->pub;
/* set start_pass to null method until we find out differently */
cconvert->pub.start_pass = null_method;
@ -455,9 +454,11 @@ jinit_color_converter (j_compress_ptr cinfo)
case JCS_RGB:
case JCS_BG_RGB:
#if RGB_PIXELSIZE != 3
if (cinfo->input_components != RGB_PIXELSIZE)
ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE);
break;
#endif /* else share code with YCbCr */
case JCS_YCbCr:
case JCS_BG_YCC:
@ -474,7 +475,6 @@ jinit_color_converter (j_compress_ptr cinfo)
default: /* JCS_UNKNOWN can be anything */
if (cinfo->input_components < 1)
ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE);
break;
}
/* Support color transform only for RGB colorspaces */
@ -507,7 +507,8 @@ jinit_color_converter (j_compress_ptr cinfo)
case JCS_BG_RGB:
if (cinfo->num_components != 3)
ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);
if (cinfo->in_color_space == cinfo->jpeg_color_space) {
if (cinfo->in_color_space != cinfo->jpeg_color_space)
ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);
switch (cinfo->color_transform) {
case JCT_NONE:
cconvert->pub.color_convert = rgb_convert;
@ -518,8 +519,6 @@ jinit_color_converter (j_compress_ptr cinfo)
default:
ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);
}
} else
ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);
break;
case JCS_YCbCr:
@ -572,10 +571,9 @@ jinit_color_converter (j_compress_ptr cinfo)
case JCS_CMYK:
if (cinfo->num_components != 4)
ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);
if (cinfo->in_color_space == JCS_CMYK)
cconvert->pub.color_convert = null_convert;
else
if (cinfo->in_color_space != JCS_CMYK)
ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);
cconvert->pub.color_convert = null_convert;
break;
case JCS_YCCK:
@ -599,6 +597,5 @@ jinit_color_converter (j_compress_ptr cinfo)
cinfo->num_components != cinfo->input_components)
ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);
cconvert->pub.color_convert = null_convert;
break;
}
}

137
jpeg/jchuff.c
View File

@ -2,7 +2,7 @@
* jchuff.c
*
* Copyright (C) 1991-1997, Thomas G. Lane.
* Modified 2006-2013 by Guido Vollbeding.
* Modified 2006-2019 by Guido Vollbeding.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
@ -178,13 +178,12 @@ jpeg_make_c_derived_tbl (j_compress_ptr cinfo, boolean isDC, int tblno,
htbl =
isDC ? cinfo->dc_huff_tbl_ptrs[tblno] : cinfo->ac_huff_tbl_ptrs[tblno];
if (htbl == NULL)
ERREXIT1(cinfo, JERR_NO_HUFF_TABLE, tblno);
htbl = jpeg_std_huff_table((j_common_ptr) cinfo, isDC, tblno);
/* Allocate a workspace if we haven't already done so. */
if (*pdtbl == NULL)
*pdtbl = (c_derived_tbl *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
SIZEOF(c_derived_tbl));
*pdtbl = (c_derived_tbl *) (*cinfo->mem->alloc_small)
((j_common_ptr) cinfo, JPOOL_IMAGE, SIZEOF(c_derived_tbl));
dtbl = *pdtbl;
/* Figure C.1: make table of Huffman code length for each symbol */
@ -1256,10 +1255,82 @@ jpeg_gen_optimal_table (j_compress_ptr cinfo, JHUFF_TBL * htbl, long freq[])
UINT8 bits[MAX_CLEN+1]; /* bits[k] = # of symbols with code length k */
int codesize[257]; /* codesize[k] = code length of symbol k */
int others[257]; /* next symbol in current branch of tree */
int c1, c2;
int p, i, j;
int c1, c2, i, j;
UINT8 *p;
long v;
freq[256] = 1; /* make sure 256 has a nonzero count */
/* Including the pseudo-symbol 256 in the Huffman procedure guarantees
* that no real symbol is given code-value of all ones, because 256
* will be placed last in the largest codeword category.
* In the symbol list build procedure this element serves as sentinel
* for the zero run loop.
*/
#ifndef DONT_USE_FANCY_HUFF_OPT
/* Build list of symbols sorted in order of descending frequency */
/* This approach has several benefits (thank to John Korejwa for the idea):
* 1.
* If a codelength category is split during the length limiting procedure
* below, the feature that more frequent symbols are assigned shorter
* codewords remains valid for the adjusted code.
* 2.
* To reduce consecutive ones in a Huffman data stream (thus reducing the
* number of stuff bytes in JPEG) it is preferable to follow 0 branches
* (and avoid 1 branches) as much as possible. This is easily done by
* assigning symbols to leaves of the Huffman tree in order of decreasing
* frequency, with no secondary sort based on codelengths.
* 3.
* The symbol list can be built independently from the assignment of code
* lengths by the Huffman procedure below.
* Note: The symbol list build procedure must be performed first, because
* the Huffman procedure assigning the codelengths clobbers the frequency
* counts!
*/
/* Here we use the others array as a linked list of nonzero frequencies
* to be sorted. Already sorted elements are removed from the list.
*/
/* Building list */
/* This item does not correspond to a valid symbol frequency and is used
* as starting index.
*/
j = 256;
for (i = 0;; i++) {
if (freq[i] == 0) /* skip zero frequencies */
continue;
if (i > 255)
break;
others[j] = i; /* this symbol value */
j = i; /* previous symbol value */
}
others[j] = -1; /* mark end of list */
/* Sorting list */
p = htbl->huffval;
while ((c1 = others[256]) >= 0) {
v = freq[c1];
i = c1; /* first symbol value */
j = 256; /* pseudo symbol value for starting index */
while ((c2 = others[c1]) >= 0) {
if (freq[c2] > v) {
v = freq[c2];
i = c2; /* this symbol value */
j = c1; /* previous symbol value */
}
c1 = c2;
}
others[j] = others[i]; /* remove this symbol i from list */
*p++ = (UINT8) i;
}
#endif /* DONT_USE_FANCY_HUFF_OPT */
/* This algorithm is explained in section K.2 of the JPEG standard */
MEMZERO(bits, SIZEOF(bits));
@ -1267,12 +1338,6 @@ jpeg_gen_optimal_table (j_compress_ptr cinfo, JHUFF_TBL * htbl, long freq[])
for (i = 0; i < 257; i++)
others[i] = -1; /* init links to empty */
freq[256] = 1; /* make sure 256 has a nonzero count */
/* Including the pseudo-symbol 256 in the Huffman procedure guarantees
* that no real symbol is given code-value of all ones, because 256
* will be placed last in the largest codeword category.
*/
/* Huffman's basic algorithm to assign optimal code lengths to symbols */
for (;;) {
@ -1329,7 +1394,7 @@ jpeg_gen_optimal_table (j_compress_ptr cinfo, JHUFF_TBL * htbl, long freq[])
/* The JPEG standard seems to think that this can't happen, */
/* but I'm paranoid... */
if (codesize[i] > MAX_CLEN)
ERREXIT(cinfo, JERR_HUFF_CLEN_OVERFLOW);
ERREXIT(cinfo, JERR_HUFF_CLEN_OUTOFBOUNDS);
bits[codesize[i]]++;
}
@ -1349,8 +1414,11 @@ jpeg_gen_optimal_table (j_compress_ptr cinfo, JHUFF_TBL * htbl, long freq[])
for (i = MAX_CLEN; i > 16; i--) {
while (bits[i] > 0) {
j = i - 2; /* find length of new prefix to be used */
while (bits[j] == 0)
while (bits[j] == 0) {
if (j == 0)
ERREXIT(cinfo, JERR_HUFF_CLEN_OUTOFBOUNDS);
j--;
}
bits[i] -= 2; /* remove two symbols */
bits[i-1]++; /* one goes in this length */
@ -1367,20 +1435,23 @@ jpeg_gen_optimal_table (j_compress_ptr cinfo, JHUFF_TBL * htbl, long freq[])
/* Return final symbol counts (only for lengths 0..16) */
MEMCOPY(htbl->bits, bits, SIZEOF(htbl->bits));
#ifdef DONT_USE_FANCY_HUFF_OPT
/* Return a list of the symbols sorted by code length */
/* It's not real clear to me why we don't need to consider the codelength
* changes made above, but the JPEG spec seems to think this works.
/* Note: Due to the codelength changes made above, it can happen
* that more frequent symbols are assigned longer codewords.
*/
p = 0;
p = htbl->huffval;
for (i = 1; i <= MAX_CLEN; i++) {
for (j = 0; j <= 255; j++) {
if (codesize[j] == i) {
htbl->huffval[p] = (UINT8) j;
p++;
*p++ = (UINT8) j;
}
}
}
#endif /* DONT_USE_FANCY_HUFF_OPT */
/* Set sent_table FALSE so updated table will be written to JPEG file. */
htbl->sent_table = FALSE;
}
@ -1400,13 +1471,13 @@ finish_pass_gather (j_compress_ptr cinfo)
boolean did_dc[NUM_HUFF_TBLS];
boolean did_ac[NUM_HUFF_TBLS];
/* It's important not to apply jpeg_gen_optimal_table more than once
* per table, because it clobbers the input frequency counts!
*/
if (cinfo->progressive_mode)
/* Flush out buffered data (all we care about is counting the EOB symbol) */
emit_eobrun(entropy);
/* It's important not to apply jpeg_gen_optimal_table more than once
* per table, because it clobbers the input frequency counts!
*/
MEMZERO(did_dc, SIZEOF(did_dc));
MEMZERO(did_ac, SIZEOF(did_ac));
@ -1475,9 +1546,8 @@ start_pass_huff (j_compress_ptr cinfo, boolean gather_statistics)
entropy->pub.encode_mcu = encode_mcu_AC_refine;
/* AC refinement needs a correction bit buffer */
if (entropy->bit_buffer == NULL)
entropy->bit_buffer = (char *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
MAX_CORR_BITS * SIZEOF(char));
entropy->bit_buffer = (char *) (*cinfo->mem->alloc_small)
((j_common_ptr) cinfo, JPOOL_IMAGE, MAX_CORR_BITS * SIZEOF(char));
}
}
@ -1505,9 +1575,8 @@ start_pass_huff (j_compress_ptr cinfo, boolean gather_statistics)
/* Allocate and zero the statistics tables */
/* Note that jpeg_gen_optimal_table expects 257 entries in each table! */
if (entropy->dc_count_ptrs[tbl] == NULL)
entropy->dc_count_ptrs[tbl] = (long *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
257 * SIZEOF(long));
entropy->dc_count_ptrs[tbl] = (long *) (*cinfo->mem->alloc_small)
((j_common_ptr) cinfo, JPOOL_IMAGE, 257 * SIZEOF(long));
MEMZERO(entropy->dc_count_ptrs[tbl], 257 * SIZEOF(long));
} else {
/* Compute derived values for Huffman tables */
@ -1525,9 +1594,8 @@ start_pass_huff (j_compress_ptr cinfo, boolean gather_statistics)
if (tbl < 0 || tbl >= NUM_HUFF_TBLS)
ERREXIT1(cinfo, JERR_NO_HUFF_TABLE, tbl);
if (entropy->ac_count_ptrs[tbl] == NULL)
entropy->ac_count_ptrs[tbl] = (long *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
257 * SIZEOF(long));
entropy->ac_count_ptrs[tbl] = (long *) (*cinfo->mem->alloc_small)
((j_common_ptr) cinfo, JPOOL_IMAGE, 257 * SIZEOF(long));
MEMZERO(entropy->ac_count_ptrs[tbl], 257 * SIZEOF(long));
} else {
jpeg_make_c_derived_tbl(cinfo, FALSE, tbl,
@ -1556,9 +1624,8 @@ jinit_huff_encoder (j_compress_ptr cinfo)
huff_entropy_ptr entropy;
int i;
entropy = (huff_entropy_ptr)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
SIZEOF(huff_entropy_encoder));
entropy = (huff_entropy_ptr) (*cinfo->mem->alloc_small)
((j_common_ptr) cinfo, JPOOL_IMAGE, SIZEOF(huff_entropy_encoder));
cinfo->entropy = &entropy->pub;
entropy->pub.start_pass = start_pass_huff;

8
jpeg/jcmarker.c
View File

@ -2,7 +2,7 @@
* jcmarker.c
*
* Copyright (C) 1991-1998, Thomas G. Lane.
* Modified 2003-2013 by Guido Vollbeding.
* Modified 2003-2019 by Guido Vollbeding.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
@ -471,7 +471,6 @@ emit_adobe_app14 (j_compress_ptr cinfo)
break;
default:
emit_byte(cinfo, 0); /* Color transform = 0 */
break;
}
}
@ -702,9 +701,8 @@ jinit_marker_writer (j_compress_ptr cinfo)
my_marker_ptr marker;
/* Create the subobject */
marker = (my_marker_ptr)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
SIZEOF(my_marker_writer));
marker = (my_marker_ptr) (*cinfo->mem->alloc_small)
((j_common_ptr) cinfo, JPOOL_IMAGE, SIZEOF(my_marker_writer));
cinfo->marker = &marker->pub;
/* Initialize method pointers */
marker->pub.write_file_header = write_file_header;

17
jpeg/jcmaster.c
View File

@ -2,7 +2,7 @@
* jcmaster.c
*
* Copyright (C) 1991-1997, Thomas G. Lane.
* Modified 2003-2017 by Guido Vollbeding.
* Modified 2003-2019 by Guido Vollbeding.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
@ -62,7 +62,7 @@ initial_setup (j_compress_ptr cinfo)
case 5: cinfo->natural_order = jpeg_natural_order5; break;
case 6: cinfo->natural_order = jpeg_natural_order6; break;
case 7: cinfo->natural_order = jpeg_natural_order7; break;
default: cinfo->natural_order = jpeg_natural_order; break;
default: cinfo->natural_order = jpeg_natural_order;
}
/* Derive lim_Se from block_size */
@ -114,18 +114,22 @@ initial_setup (j_compress_ptr cinfo)
*/
ssize = 1;
#ifdef DCT_SCALING_SUPPORTED
if (! cinfo->raw_data_in)
while (cinfo->min_DCT_h_scaled_size * ssize <=
(cinfo->do_fancy_downsampling ? DCTSIZE : DCTSIZE / 2) &&
(cinfo->max_h_samp_factor % (compptr->h_samp_factor * ssize * 2)) == 0) {
(cinfo->max_h_samp_factor % (compptr->h_samp_factor * ssize * 2)) ==
0) {
ssize = ssize * 2;
}
#endif
compptr->DCT_h_scaled_size = cinfo->min_DCT_h_scaled_size * ssize;
ssize = 1;
#ifdef DCT_SCALING_SUPPORTED
if (! cinfo->raw_data_in)
while (cinfo->min_DCT_v_scaled_size * ssize <=
(cinfo->do_fancy_downsampling ? DCTSIZE : DCTSIZE / 2) &&
(cinfo->max_v_samp_factor % (compptr->v_samp_factor * ssize * 2)) == 0) {
(cinfo->max_v_samp_factor % (compptr->v_samp_factor * ssize * 2)) ==
0) {
ssize = ssize * 2;
}
#endif
@ -620,9 +624,8 @@ jinit_c_master_control (j_compress_ptr cinfo, boolean transcode_only)
{
my_master_ptr master;
master = (my_master_ptr)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
SIZEOF(my_comp_master));
master = (my_master_ptr) (*cinfo->mem->alloc_small)
((j_common_ptr) cinfo, JPOOL_IMAGE, SIZEOF(my_comp_master));
cinfo->master = &master->pub;
master->pub.prepare_for_pass = prepare_for_pass;
master->pub.pass_startup = pass_startup;

138
jpeg/jcomapi.c
View File

@ -2,6 +2,7 @@
* jcomapi.c
*
* Copyright (C) 1994-1997, Thomas G. Lane.
* Modified 2019 by Guido Vollbeding.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
@ -104,3 +105,140 @@ jpeg_alloc_huff_table (j_common_ptr cinfo)
tbl->sent_table = FALSE; /* make sure this is false in any new table */
return tbl;
}
/*
* Set up the standard Huffman tables (cf. JPEG standard section K.3).
* IMPORTANT: these are only valid for 8-bit data precision!
* (Would jutils.c be a more reasonable place to put this?)
*/
GLOBAL(JHUFF_TBL *)
jpeg_std_huff_table (j_common_ptr cinfo, boolean isDC, int tblno)
{
JHUFF_TBL **htblptr, *htbl;
const UINT8 *bits, *val;
int nsymbols, len;
static const UINT8 bits_dc_luminance[17] =
{ /* 0-base */ 0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0 };
static const UINT8 val_dc_luminance[] =
{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };
static const UINT8 bits_dc_chrominance[17] =
{ /* 0-base */ 0, 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0 };
static const UINT8 val_dc_chrominance[] =
{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };
static const UINT8 bits_ac_luminance[17] =
{ /* 0-base */ 0, 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7d };
static const UINT8 val_ac_luminance[] =
{ 0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12,
0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07,
0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08,
0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0,
0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16,
0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28,
0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49,
0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,
0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79,
0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,
0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,
0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6,
0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5,
0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4,
0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2,
0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea,
0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
0xf9, 0xfa };
static const UINT8 bits_ac_chrominance[17] =
{ /* 0-base */ 0, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77 };
static const UINT8 val_ac_chrominance[] =
{ 0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21,
0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91,
0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0,
0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34,
0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26,
0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38,
0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48,
0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68,
0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96,
0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5,
0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4,
0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3,
0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2,
0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda,
0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9,
0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
0xf9, 0xfa };
if (cinfo->is_decompressor) {
if (isDC)
htblptr = ((j_decompress_ptr) cinfo)->dc_huff_tbl_ptrs;
else
htblptr = ((j_decompress_ptr) cinfo)->ac_huff_tbl_ptrs;
} else {
if (isDC)
htblptr = ((j_compress_ptr) cinfo)->dc_huff_tbl_ptrs;
else
htblptr = ((j_compress_ptr) cinfo)->ac_huff_tbl_ptrs;
}
switch (tblno) {
case 0:
if (isDC) {
bits = bits_dc_luminance;
val = val_dc_luminance;
} else {
bits = bits_ac_luminance;
val = val_ac_luminance;
}
break;
case 1:
if (isDC) {
bits = bits_dc_chrominance;
val = val_dc_chrominance;
} else {
bits = bits_ac_chrominance;
val = val_ac_chrominance;
}
break;
default:
ERREXIT1(cinfo, JERR_NO_HUFF_TABLE, tblno);
return NULL; /* avoid compiler warnings for uninitialized variables */
}
if (htblptr[tblno] == NULL)
htblptr[tblno] = jpeg_alloc_huff_table(cinfo);
htbl = htblptr[tblno];
/* Copy the number-of-symbols-of-each-code-length counts */
MEMCOPY(htbl->bits, bits, SIZEOF(htbl->bits));
/* Validate the counts. We do this here mainly so we can copy the right
* number of symbols from the val[] array, without risking marching off
* the end of memory. jxhuff.c will do a more thorough test later.
*/
nsymbols = 0;
for (len = 1; len <= 16; len++)
nsymbols += bits[len];
if (nsymbols > 256)
ERREXIT(cinfo, JERR_BAD_HUFF_TABLE);
if (nsymbols > 0)
MEMCOPY(htbl->huffval, val, nsymbols * SIZEOF(UINT8));
/* Initialize sent_table FALSE so table will be written to JPEG file. */
htbl->sent_table = FALSE;
return htbl;
}

111
jpeg/jcparam.c
View File

@ -2,7 +2,7 @@
* jcparam.c
*
* Copyright (C) 1991-1998, Thomas G. Lane.
* Modified 2003-2013 by Guido Vollbeding.
* Modified 2003-2019 by Guido Vollbeding.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
@ -162,112 +162,23 @@ jpeg_set_quality (j_compress_ptr cinfo, int quality, boolean force_baseline)
/*
* Huffman table setup routines
* Reset standard Huffman tables
*/
LOCAL(void)
add_huff_table (j_compress_ptr cinfo,
JHUFF_TBL **htblptr, const UINT8 *bits, const UINT8 *val)
/* Define a Huffman table */
{
int nsymbols, len;
if (*htblptr == NULL)
*htblptr = jpeg_alloc_huff_table((j_common_ptr) cinfo);
/* Copy the number-of-symbols-of-each-code-length counts */
MEMCOPY((*htblptr)->bits, bits, SIZEOF((*htblptr)->bits));
/* Validate the counts. We do this here mainly so we can copy the right
* number of symbols from the val[] array, without risking marching off
* the end of memory. jchuff.c will do a more thorough test later.
*/
nsymbols = 0;
for (len = 1; len <= 16; len++)
nsymbols += bits[len];
if (nsymbols < 1 || nsymbols > 256)
ERREXIT(cinfo, JERR_BAD_HUFF_TABLE);
MEMCOPY((*htblptr)->huffval, val, nsymbols * SIZEOF(UINT8));
/* Initialize sent_table FALSE so table will be written to JPEG file. */
(*htblptr)->sent_table = FALSE;
}
LOCAL(void)
std_huff_tables (j_compress_ptr cinfo)
/* Set up the standard Huffman tables (cf. JPEG standard section K.3) */
/* IMPORTANT: these are only valid for 8-bit data precision! */
{
static const UINT8 bits_dc_luminance[17] =
{ /* 0-base */ 0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0 };
static const UINT8 val_dc_luminance[] =
{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };
if (cinfo->dc_huff_tbl_ptrs[0] != NULL)
(void) jpeg_std_huff_table((j_common_ptr) cinfo, TRUE, 0);
static const UINT8 bits_dc_chrominance[17] =
{ /* 0-base */ 0, 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0 };
static const UINT8 val_dc_chrominance[] =
{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };
if (cinfo->ac_huff_tbl_ptrs[0] != NULL)
(void) jpeg_std_huff_table((j_common_ptr) cinfo, FALSE, 0);
static const UINT8 bits_ac_luminance[17] =
{ /* 0-base */ 0, 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7d };
static const UINT8 val_ac_luminance[] =
{ 0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12,
0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07,
0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08,
0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0,
0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16,
0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28,
0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49,
0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,
0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79,
0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,
0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,
0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6,
0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5,
0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4,
0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2,
0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea,
0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
0xf9, 0xfa };
if (cinfo->dc_huff_tbl_ptrs[1] != NULL)
(void) jpeg_std_huff_table((j_common_ptr) cinfo, TRUE, 1);
static const UINT8 bits_ac_chrominance[17] =
{ /* 0-base */ 0, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77 };
static const UINT8 val_ac_chrominance[] =
{ 0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21,
0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91,
0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0,
0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34,
0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26,
0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38,
0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48,
0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68,
0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96,
0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5,
0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4,
0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3,
0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2,
0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda,
0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9,
0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
0xf9, 0xfa };
add_huff_table(cinfo, &cinfo->dc_huff_tbl_ptrs[0],
bits_dc_luminance, val_dc_luminance);
add_huff_table(cinfo, &cinfo->ac_huff_tbl_ptrs[0],
bits_ac_luminance, val_ac_luminance);
add_huff_table(cinfo, &cinfo->dc_huff_tbl_ptrs[1],
bits_dc_chrominance, val_dc_chrominance);
add_huff_table(cinfo, &cinfo->ac_huff_tbl_ptrs[1],
bits_ac_chrominance, val_ac_chrominance);
if (cinfo->ac_huff_tbl_ptrs[1] != NULL)
(void) jpeg_std_huff_table((j_common_ptr) cinfo, FALSE, 1);
}
@ -306,7 +217,7 @@ jpeg_set_defaults (j_compress_ptr cinfo)
cinfo->data_precision = BITS_IN_JSAMPLE;
/* Set up two quantization tables using default quality of 75 */
jpeg_set_quality(cinfo, 75, TRUE);
/* Set up two Huffman tables */
/* Reset standard Huffman tables */
std_huff_tables(cinfo);
/* Initialize default arithmetic coding conditioning */

28
jpeg/jdarith.c
View File

@ -1,7 +1,7 @@
/*
* jdarith.c
*
* Developed 1997-2015 by Guido Vollbeding.
* Developed 1997-2019 by Guido Vollbeding.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
@ -280,7 +280,7 @@ decode_mcu_DC_first (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
if ((m = arith_decode(cinfo, st)) != 0) {
st = entropy->dc_stats[tbl] + 20; /* Table F.4: X1 = 20 */
while (arith_decode(cinfo, st)) {
if ((m <<= 1) == 0x8000) {
if ((m <<= 1) == (int) 0x8000U) {
WARNMS(cinfo, JWRN_ARITH_BAD_CODE);
entropy->ct = -1; /* magnitude overflow */
return TRUE;
@ -370,7 +370,7 @@ decode_mcu_AC_first (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
st = entropy->ac_stats[tbl] +
(k <= cinfo->arith_ac_K[tbl] ? 189 : 217);
while (arith_decode(cinfo, st)) {
if ((m <<= 1) == 0x8000) {
if ((m <<= 1) == (int) 0x8000U) {
WARNMS(cinfo, JWRN_ARITH_BAD_CODE);
entropy->ct = -1; /* magnitude overflow */
return TRUE;
@ -404,7 +404,8 @@ decode_mcu_DC_refine (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
{
arith_entropy_ptr entropy = (arith_entropy_ptr) cinfo->entropy;
unsigned char *st;
int p1, blkn;
JCOEF p1;
int blkn;
/* Process restart marker if needed */
if (cinfo->restart_interval) {
@ -440,7 +441,7 @@ decode_mcu_AC_refine (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
JCOEFPTR thiscoef;
unsigned char *st;
int tbl, k, kex;
int p1, m1;
JCOEF p1, m1;
const int * natural_order;
/* Process restart marker if needed */
@ -459,7 +460,7 @@ decode_mcu_AC_refine (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
tbl = cinfo->cur_comp_info[0]->ac_tbl_no;
p1 = 1 << cinfo->Al; /* 1 in the bit position being coded */
m1 = (-1) << cinfo->Al; /* -1 in the bit position being coded */
m1 = -p1; /* -1 in the bit position being coded */
/* Establish EOBx (previous stage end-of-block) index */
kex = cinfo->Se;
@ -555,7 +556,7 @@ decode_mcu (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
if ((m = arith_decode(cinfo, st)) != 0) {
st = entropy->dc_stats[tbl] + 20; /* Table F.4: X1 = 20 */
while (arith_decode(cinfo, st)) {
if ((m <<= 1) == 0x8000) {
if ((m <<= 1) == (int) 0x8000U) {
WARNMS(cinfo, JWRN_ARITH_BAD_CODE);
entropy->ct = -1; /* magnitude overflow */
return TRUE;
@ -612,7 +613,7 @@ decode_mcu (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
st = entropy->ac_stats[tbl] +
(k <= cinfo->arith_ac_K[tbl] ? 189 : 217);
while (arith_decode(cinfo, st)) {
if ((m <<= 1) == 0x8000) {
if ((m <<= 1) == (int) 0x8000U) {
WARNMS(cinfo, JWRN_ARITH_BAD_CODE);
entropy->ct = -1; /* magnitude overflow */
return TRUE;
@ -766,9 +767,8 @@ jinit_arith_decoder (j_decompress_ptr cinfo)
arith_entropy_ptr entropy;
int i;
entropy = (arith_entropy_ptr)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
SIZEOF(arith_entropy_decoder));
entropy = (arith_entropy_ptr) (*cinfo->mem->alloc_small)
((j_common_ptr) cinfo, JPOOL_IMAGE, SIZEOF(arith_entropy_decoder));
cinfo->entropy = &entropy->pub;
entropy->pub.start_pass = start_pass;
entropy->pub.finish_pass = finish_pass;
@ -785,9 +785,9 @@ jinit_arith_decoder (j_decompress_ptr cinfo)
if (cinfo->progressive_mode) {
/* Create progression status table */
int *coef_bit_ptr, ci;
cinfo->coef_bits = (int (*)[DCTSIZE2])
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
cinfo->num_components*DCTSIZE2*SIZEOF(int));
cinfo->coef_bits = (int (*)[DCTSIZE2]) (*cinfo->mem->alloc_small)
((j_common_ptr) cinfo, JPOOL_IMAGE,
cinfo->num_components * DCTSIZE2 * SIZEOF(int));
coef_bit_ptr = & cinfo->coef_bits[0][0];
for (ci = 0; ci < cinfo->num_components; ci++)
for (i = 0; i < DCTSIZE2; i++)

23
jpeg/jdatadst.c
View File

@ -2,7 +2,7 @@
* jdatadst.c
*
* Copyright (C) 1994-1996, Thomas G. Lane.
* Modified 2009-2017 by Guido Vollbeding.
* Modified 2009-2019 by Guido Vollbeding.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
@ -46,7 +46,7 @@ typedef struct {
struct jpeg_destination_mgr pub; /* public fields */
unsigned char ** outbuffer; /* target buffer */
unsigned long * outsize;
size_t * outsize;
unsigned char * newbuffer; /* newly allocated buffer */
JOCTET * buffer; /* start of buffer */
size_t bufsize;
@ -66,9 +66,8 @@ init_destination (j_compress_ptr cinfo)
my_dest_ptr dest = (my_dest_ptr) cinfo->dest;
/* Allocate the output buffer --- it will be released when done with image */
dest->buffer = (JOCTET *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
OUTPUT_BUF_SIZE * SIZEOF(JOCTET));
dest->buffer = (JOCTET *) (*cinfo->mem->alloc_small)
((j_common_ptr) cinfo, JPOOL_IMAGE, OUTPUT_BUF_SIZE * SIZEOF(JOCTET));
dest->pub.next_output_byte = dest->buffer;
dest->pub.free_in_buffer = OUTPUT_BUF_SIZE;
@ -131,7 +130,7 @@ empty_mem_output_buffer (j_compress_ptr cinfo)
nextbuffer = (JOCTET *) malloc(nextsize);
if (nextbuffer == NULL)
ERREXIT1(cinfo, JERR_OUT_OF_MEMORY, 10);
ERREXIT1(cinfo, JERR_OUT_OF_MEMORY, 11);
MEMCOPY(nextbuffer, dest->buffer, dest->bufsize);
@ -204,9 +203,8 @@ jpeg_stdio_dest (j_compress_ptr cinfo, FILE * outfile)
* sizes may be different. Caveat programmer.
*/
if (cinfo->dest == NULL) { /* first time for this JPEG object? */
cinfo->dest = (struct jpeg_destination_mgr *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
SIZEOF(my_destination_mgr));
cinfo->dest = (struct jpeg_destination_mgr *) (*cinfo->mem->alloc_small)
((j_common_ptr) cinfo, JPOOL_PERMANENT, SIZEOF(my_destination_mgr));
}
dest = (my_dest_ptr) cinfo->dest;
@ -233,7 +231,7 @@ jpeg_stdio_dest (j_compress_ptr cinfo, FILE * outfile)
GLOBAL(void)
jpeg_mem_dest (j_compress_ptr cinfo,
unsigned char ** outbuffer, unsigned long * outsize)
unsigned char ** outbuffer, size_t * outsize)
{
my_mem_dest_ptr dest;
@ -244,9 +242,8 @@ jpeg_mem_dest (j_compress_ptr cinfo,
* can be written to the same buffer without re-executing jpeg_mem_dest.
*/
if (cinfo->dest == NULL) { /* first time for this JPEG object? */
cinfo->dest = (struct jpeg_destination_mgr *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
SIZEOF(my_mem_destination_mgr));
cinfo->dest = (struct jpeg_destination_mgr *) (*cinfo->mem->alloc_small)
((j_common_ptr) cinfo, JPOOL_PERMANENT, SIZEOF(my_mem_destination_mgr));
}
dest = (my_mem_dest_ptr) cinfo->dest;

31
jpeg/jdatasrc.c
View File

@ -2,7 +2,7 @@
* jdatasrc.c
*
* Copyright (C) 1994-1996, Thomas G. Lane.
* Modified 2009-2015 by Guido Vollbeding.
* Modified 2009-2019 by Guido Vollbeding.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
@ -156,21 +156,23 @@ METHODDEF(void)
skip_input_data (j_decompress_ptr cinfo, long num_bytes)
{
struct jpeg_source_mgr * src = cinfo->src;
size_t nbytes;
/* Just a dumb implementation for now. Could use fseek() except
* it doesn't work on pipes. Not clear that being smart is worth
* any trouble anyway --- large skips are infrequent.
*/
if (num_bytes > 0) {
while (num_bytes > (long) src->bytes_in_buffer) {
num_bytes -= (long) src->bytes_in_buffer;
nbytes = (size_t) num_bytes;
while (nbytes > src->bytes_in_buffer) {
nbytes -= src->bytes_in_buffer;
(void) (*src->fill_input_buffer) (cinfo);
/* note we assume that fill_input_buffer will never return FALSE,
* so suspension need not be handled.
*/
}
src->next_input_byte += (size_t) num_bytes;
src->bytes_in_buffer -= (size_t) num_bytes;
src->next_input_byte += nbytes;
src->bytes_in_buffer -= nbytes;
}
}
@ -219,13 +221,11 @@ jpeg_stdio_src (j_decompress_ptr cinfo, FILE * infile)
* manager serially with the same JPEG object. Caveat programmer.
*/
if (cinfo->src == NULL) { /* first time for this JPEG object? */
cinfo->src = (struct jpeg_source_mgr *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
SIZEOF(my_source_mgr));
cinfo->src = (struct jpeg_source_mgr *) (*cinfo->mem->alloc_small)
((j_common_ptr) cinfo, JPOOL_PERMANENT, SIZEOF(my_source_mgr));
src = (my_src_ptr) cinfo->src;
src->buffer = (JOCTET *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
INPUT_BUF_SIZE * SIZEOF(JOCTET));
src->buffer = (JOCTET *) (*cinfo->mem->alloc_small)
((j_common_ptr) cinfo, JPOOL_PERMANENT, INPUT_BUF_SIZE * SIZEOF(JOCTET));
}
src = (my_src_ptr) cinfo->src;
@ -247,7 +247,7 @@ jpeg_stdio_src (j_decompress_ptr cinfo, FILE * infile)
GLOBAL(void)
jpeg_mem_src (j_decompress_ptr cinfo,
const unsigned char * inbuffer, unsigned long insize)
const unsigned char * inbuffer, size_t insize)
{
struct jpeg_source_mgr * src;
@ -259,9 +259,8 @@ jpeg_mem_src (j_decompress_ptr cinfo,
* the first one.
*/
if (cinfo->src == NULL) { /* first time for this JPEG object? */
cinfo->src = (struct jpeg_source_mgr *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
SIZEOF(struct jpeg_source_mgr));
cinfo->src = (struct jpeg_source_mgr *) (*cinfo->mem->alloc_small)
((j_common_ptr) cinfo, JPOOL_PERMANENT, SIZEOF(struct jpeg_source_mgr));
}
src = cinfo->src;
@ -270,6 +269,6 @@ jpeg_mem_src (j_decompress_ptr cinfo,
src->skip_input_data = skip_input_data;
src->resync_to_restart = jpeg_resync_to_restart; /* use default method */
src->term_source = term_source;
src->bytes_in_buffer = (size_t) insize;
src->bytes_in_buffer = insize;
src->next_input_byte = (const JOCTET *) inbuffer;
}

110
jpeg/jdcolor.c
View File

@ -2,7 +2,7 @@
* jdcolor.c
*
* Copyright (C) 1991-1997, Thomas G. Lane.
* Modified 2011-2017 by Guido Vollbeding.
* Modified 2011-2019 by Guido Vollbeding.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
@ -124,28 +124,22 @@ build_ycc_rgb_table (j_decompress_ptr cinfo)
INT32 x;
SHIFT_TEMPS
cconvert->Cr_r_tab = (int *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
(MAXJSAMPLE+1) * SIZEOF(int));
cconvert->Cb_b_tab = (int *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
(MAXJSAMPLE+1) * SIZEOF(int));
cconvert->Cr_g_tab = (INT32 *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
(MAXJSAMPLE+1) * SIZEOF(INT32));
cconvert->Cb_g_tab = (INT32 *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
(MAXJSAMPLE+1) * SIZEOF(INT32));
cconvert->Cr_r_tab = (int *) (*cinfo->mem->alloc_small)
((j_common_ptr) cinfo, JPOOL_IMAGE, (MAXJSAMPLE+1) * SIZEOF(int));
cconvert->Cb_b_tab = (int *) (*cinfo->mem->alloc_small)
((j_common_ptr) cinfo, JPOOL_IMAGE, (MAXJSAMPLE+1) * SIZEOF(int));
cconvert->Cr_g_tab = (INT32 *) (*cinfo->mem->alloc_small)
((j_common_ptr) cinfo, JPOOL_IMAGE, (MAXJSAMPLE+1) * SIZEOF(INT32));
cconvert->Cb_g_tab = (INT32 *) (*cinfo->mem->alloc_small)
((j_common_ptr) cinfo, JPOOL_IMAGE, (MAXJSAMPLE+1) * SIZEOF(INT32));
for (i = 0, x = -CENTERJSAMPLE; i <= MAXJSAMPLE; i++, x++) {
/* i is the actual input pixel value, in the range 0..MAXJSAMPLE */
/* The Cb or Cr value we are thinking of is x = i - CENTERJSAMPLE */
/* Cr=>R value is nearest int to 1.402 * x */
cconvert->Cr_r_tab[i] = (int)
RIGHT_SHIFT(FIX(1.402) * x + ONE_HALF, SCALEBITS);
cconvert->Cr_r_tab[i] = (int) DESCALE(FIX(1.402) * x, SCALEBITS);
/* Cb=>B value is nearest int to 1.772 * x */
cconvert->Cb_b_tab[i] = (int)
RIGHT_SHIFT(FIX(1.772) * x + ONE_HALF, SCALEBITS);
cconvert->Cb_b_tab[i] = (int) DESCALE(FIX(1.772) * x, SCALEBITS);
/* Cr=>G value is scaled-up -0.714136286 * x */
cconvert->Cr_g_tab[i] = (- FIX(0.714136286)) * x;
/* Cb=>G value is scaled-up -0.344136286 * x */
@ -164,28 +158,22 @@ build_bg_ycc_rgb_table (j_decompress_ptr cinfo)
INT32 x;
SHIFT_TEMPS
cconvert->Cr_r_tab = (int *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
(MAXJSAMPLE+1) * SIZEOF(int));
cconvert->Cb_b_tab = (int *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
(MAXJSAMPLE+1) * SIZEOF(int));
cconvert->Cr_g_tab = (INT32 *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
(MAXJSAMPLE+1) * SIZEOF(INT32));
cconvert->Cb_g_tab = (INT32 *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
(MAXJSAMPLE+1) * SIZEOF(INT32));
cconvert->Cr_r_tab = (int *) (*cinfo->mem->alloc_small)
((j_common_ptr) cinfo, JPOOL_IMAGE, (MAXJSAMPLE+1) * SIZEOF(int));
cconvert->Cb_b_tab = (int *) (*cinfo->mem->alloc_small)
((j_common_ptr) cinfo, JPOOL_IMAGE, (MAXJSAMPLE+1) * SIZEOF(int));
cconvert->Cr_g_tab = (INT32 *) (*cinfo->mem->alloc_small)
((j_common_ptr) cinfo, JPOOL_IMAGE, (MAXJSAMPLE+1) * SIZEOF(INT32));
cconvert->Cb_g_tab = (INT32 *) (*cinfo->mem->alloc_small)
((j_common_ptr) cinfo, JPOOL_IMAGE, (MAXJSAMPLE+1) * SIZEOF(INT32));
for (i = 0, x = -CENTERJSAMPLE; i <= MAXJSAMPLE; i++, x++) {
/* i is the actual input pixel value, in the range 0..MAXJSAMPLE */
/* The Cb or Cr value we are thinking of is x = i - CENTERJSAMPLE */
/* Cr=>R value is nearest int to 2.804 * x */
cconvert->Cr_r_tab[i] = (int)
RIGHT_SHIFT(FIX(2.804) * x + ONE_HALF, SCALEBITS);
cconvert->Cr_r_tab[i] = (int) DESCALE(FIX(2.804) * x, SCALEBITS);
/* Cb=>B value is nearest int to 3.544 * x */
cconvert->Cb_b_tab[i] = (int)
RIGHT_SHIFT(FIX(3.544) * x + ONE_HALF, SCALEBITS);
cconvert->Cb_b_tab[i] = (int) DESCALE(FIX(3.544) * x, SCALEBITS);
/* Cr=>G value is scaled-up -1.428272572 * x */
cconvert->Cr_g_tab[i] = (- FIX(1.428272572)) * x;
/* Cb=>G value is scaled-up -0.688272572 * x */
@ -201,6 +189,7 @@ build_bg_ycc_rgb_table (j_decompress_ptr cinfo)
* Note that we change from noninterleaved, one-plane-per-component format
* to interleaved-pixel format. The output buffer is therefore three times
* as wide as the input buffer.
*
* A starting row offset is provided only for the input buffer. The caller
* can easily adjust the passed output_buf value to accommodate any row
* offset required on that side.
@ -264,9 +253,8 @@ build_rgb_y_table (j_decompress_ptr cinfo)
INT32 i;
/* Allocate and fill in the conversion tables. */
cconvert->rgb_y_tab = rgb_y_tab = (INT32 *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
(TABLE_SIZE * SIZEOF(INT32)));
cconvert->rgb_y_tab = rgb_y_tab = (INT32 *) (*cinfo->mem->alloc_small)
((j_common_ptr) cinfo, JPOOL_IMAGE, TABLE_SIZE * SIZEOF(INT32));
for (i = 0; i <= MAXJSAMPLE; i++) {
rgb_y_tab[i+R_Y_OFF] = FIX(0.299) * i;
@ -286,8 +274,8 @@ rgb_gray_convert (j_decompress_ptr cinfo,
JSAMPARRAY output_buf, int num_rows)
{
my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert;
register INT32 * ctab = cconvert->rgb_y_tab;
register int r, g, b;
register INT32 * ctab = cconvert->rgb_y_tab;
register JSAMPROW outptr;
register JSAMPROW inptr0, inptr1, inptr2;
register JDIMENSION col;
@ -313,6 +301,7 @@ rgb_gray_convert (j_decompress_ptr cinfo,
/*
* Convert some rows of samples to the output colorspace.
* [R-G,G,B-G] to [R,G,B] conversion with modulo calculation
* (inverse color transform).
* This can be seen as an adaption of the general YCbCr->RGB
@ -364,8 +353,8 @@ rgb1_gray_convert (j_decompress_ptr cinfo,
JSAMPARRAY output_buf, int num_rows)
{
my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert;
register INT32 * ctab = cconvert->rgb_y_tab;
register int r, g, b;
register INT32 * ctab = cconvert->rgb_y_tab;
register JSAMPROW outptr;
register JSAMPROW inptr0, inptr1, inptr2;
register JDIMENSION col;
@ -396,6 +385,7 @@ rgb1_gray_convert (j_decompress_ptr cinfo,
/*
* Convert some rows of samples to the output colorspace.
* No colorspace change, but conversion from separate-planes
* to interleaved representation.
*/
@ -430,6 +420,7 @@ rgb_convert (j_decompress_ptr cinfo,
/*
* Color conversion for no colorspace change: just copy the data,
* converting from separate-planes to interleaved representation.
* We assume out_color_components == num_components.
*/
METHODDEF(void)
@ -437,20 +428,21 @@ null_convert (j_decompress_ptr cinfo,
JSAMPIMAGE input_buf, JDIMENSION input_row,
JSAMPARRAY output_buf, int num_rows)
{
int ci;
register int nc = cinfo->num_components;
register JSAMPROW outptr;
register JSAMPROW inptr;
register JDIMENSION col;
register JDIMENSION count;
register int num_comps = cinfo->num_components;
JDIMENSION num_cols = cinfo->output_width;
int ci;
while (--num_rows >= 0) {
for (ci = 0; ci < nc; ci++) {
/* It seems fastest to make a separate pass for each component. */
for (ci = 0; ci < num_comps; ci++) {
inptr = input_buf[ci][input_row];
outptr = output_buf[0] + ci;
for (col = 0; col < num_cols; col++) {
*outptr = *inptr++; /* needn't bother with GETJSAMPLE() here */
outptr += nc;
for (count = num_cols; count > 0; count--) {
*outptr = *inptr++; /* don't need GETJSAMPLE() here */
outptr += num_comps;
}
}
input_row++;
@ -504,9 +496,10 @@ gray_rgb_convert (j_decompress_ptr cinfo,
/*
* Adobe-style YCCK->CMYK conversion.
* We convert YCbCr to R=1-C, G=1-M, and B=1-Y using the same
* conversion as above, while passing K (black) unchanged.
* Convert some rows of samples to the output colorspace.
* This version handles Adobe-style YCCK->CMYK conversion,
* where we convert YCbCr to R=1-C, G=1-M, and B=1-Y using the
* same conversion as above, while passing K (black) unchanged.
* We assume build_ycc_rgb_table has been called.
*/
@ -577,9 +570,8 @@ jinit_color_deconverter (j_decompress_ptr cinfo)
my_cconvert_ptr cconvert;
int ci;
cconvert = (my_cconvert_ptr)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
SIZEOF(my_color_deconverter));
cconvert = (my_cconvert_ptr) (*cinfo->mem->alloc_small)
((j_common_ptr) cinfo, JPOOL_IMAGE, SIZEOF(my_color_deconverter));
cinfo->cconvert = &cconvert->pub;
cconvert->pub.start_pass = start_pass_dcolor;
@ -607,7 +599,6 @@ jinit_color_deconverter (j_decompress_ptr cinfo)
default: /* JCS_UNKNOWN can be anything */
if (cinfo->num_components < 1)
ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);
break;
}
/* Support color transform only for RGB colorspaces */
@ -684,7 +675,8 @@ jinit_color_deconverter (j_decompress_ptr cinfo)
case JCS_BG_RGB:
cinfo->out_color_components = RGB_PIXELSIZE;
if (cinfo->jpeg_color_space == JCS_BG_RGB) {
if (cinfo->jpeg_color_space != JCS_BG_RGB)
ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);
switch (cinfo->color_transform) {
case JCT_NONE:
cconvert->pub.color_convert = rgb_convert;
@ -695,8 +687,6 @@ jinit_color_deconverter (j_decompress_ptr cinfo)
default:
ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);
}
} else
ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);
break;
case JCS_CMYK:
@ -714,14 +704,12 @@ jinit_color_deconverter (j_decompress_ptr cinfo)
}
break;
default:
/* Permit null conversion to same output space */
if (cinfo->out_color_space == cinfo->jpeg_color_space) {
default: /* permit null conversion to same output space */
if (cinfo->out_color_space != cinfo->jpeg_color_space)
/* unsupported non-null conversion */
ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);
cinfo->out_color_components = cinfo->num_components;
cconvert->pub.color_convert = null_convert;
} else /* unsupported non-null conversion */
ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);
break;
}
if (cinfo->quantize_colors)

9
jpeg/jdct.h
View File

@ -2,7 +2,7 @@
* jdct.h
*
* Copyright (C) 1994-1996, Thomas G. Lane.
* Modified 2002-2017 by Guido Vollbeding.
* Modified 2002-2019 by Guido Vollbeding.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
@ -358,13 +358,6 @@ EXTERN(void) jpeg_idct_1x2
#define FIX(x) ((INT32) ((x) * CONST_SCALE + 0.5))
/* Descale and correctly round an INT32 value that's scaled by N bits.
* We assume RIGHT_SHIFT rounds towards minus infinity, so adding
* the fudge factor is correct for either sign of X.
*/
#define DESCALE(x,n) RIGHT_SHIFT((x) + (ONE << ((n)-1)), n)
/* Multiply an INT32 variable by an INT32 constant to yield an INT32 result.
* This macro is used only when the two inputs will actually be no more than
* 16 bits wide, so that a 16x16->32 bit multiply can be used instead of a

86
jpeg/jdhuff.c
View File

@ -2,7 +2,7 @@
* jdhuff.c
*
* Copyright (C) 1991-1997, Thomas G. Lane.
* Modified 2006-2016 by Guido Vollbeding.
* Modified 2006-2019 by Guido Vollbeding.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
@ -341,13 +341,12 @@ jpeg_make_d_derived_tbl (j_decompress_ptr cinfo, boolean isDC, int tblno,
htbl =
isDC ? cinfo->dc_huff_tbl_ptrs[tblno] : cinfo->ac_huff_tbl_ptrs[tblno];
if (htbl == NULL)
ERREXIT1(cinfo, JERR_NO_HUFF_TABLE, tblno);
htbl = jpeg_std_huff_table((j_common_ptr) cinfo, isDC, tblno);
/* Allocate a workspace if we haven't already done so. */
if (*pdtbl == NULL)
*pdtbl = (d_derived_tbl *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
SIZEOF(d_derived_tbl));
*pdtbl = (d_derived_tbl *) (*cinfo->mem->alloc_small)
((j_common_ptr) cinfo, JPOOL_IMAGE, SIZEOF(d_derived_tbl));
dtbl = *pdtbl;
dtbl->pub = htbl; /* fill in back link */
@ -730,7 +729,7 @@ decode_mcu_DC_first (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
if (! entropy->insufficient_data) {
/* Load up working state */
BITREAD_LOAD_STATE(cinfo,entropy->bitstate);
BITREAD_LOAD_STATE(cinfo, entropy->bitstate);
ASSIGN_STATE(state, entropy->saved);
/* Outer loop handles each block in the MCU */
@ -759,11 +758,12 @@ decode_mcu_DC_first (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
}
/* Completed MCU, so update state */
BITREAD_SAVE_STATE(cinfo,entropy->bitstate);
BITREAD_SAVE_STATE(cinfo, entropy->bitstate);
ASSIGN_STATE(entropy->saved, state);
}
/* Account for restart interval (no-op if not using restarts) */
/* Account for restart interval if using restarts */
if (cinfo->restart_interval)
entropy->restarts_to_go--;
return TRUE;
@ -809,7 +809,7 @@ decode_mcu_AC_first (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
if (EOBRUN) /* if it's a band of zeroes... */
EOBRUN--; /* ...process it now (we do nothing) */
else {
BITREAD_LOAD_STATE(cinfo,entropy->bitstate);
BITREAD_LOAD_STATE(cinfo, entropy->bitstate);
Se = cinfo->Se;
Al = cinfo->Al;
natural_order = cinfo->natural_order;
@ -842,14 +842,15 @@ decode_mcu_AC_first (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
}
}
BITREAD_SAVE_STATE(cinfo,entropy->bitstate);
BITREAD_SAVE_STATE(cinfo, entropy->bitstate);
}
/* Completed MCU, so update state */
entropy->saved.EOBRUN = EOBRUN; /* only part of saved state we need */
}
/* Account for restart interval (no-op if not using restarts) */
/* Account for restart interval if using restarts */
if (cinfo->restart_interval)
entropy->restarts_to_go--;
return TRUE;
@ -866,7 +867,8 @@ METHODDEF(boolean)
decode_mcu_DC_refine (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
{
huff_entropy_ptr entropy = (huff_entropy_ptr) cinfo->entropy;
int p1, blkn;
JCOEF p1;
int blkn;
BITREAD_STATE_VARS;
/* Process restart marker if needed; may have to suspend */
@ -881,7 +883,7 @@ decode_mcu_DC_refine (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
*/
/* Load up working state */
BITREAD_LOAD_STATE(cinfo,entropy->bitstate);
BITREAD_LOAD_STATE(cinfo, entropy->bitstate);
p1 = 1 << cinfo->Al; /* 1 in the bit position being coded */
@ -896,9 +898,10 @@ decode_mcu_DC_refine (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
}
/* Completed MCU, so update state */
BITREAD_SAVE_STATE(cinfo,entropy->bitstate);
BITREAD_SAVE_STATE(cinfo, entropy->bitstate);
/* Account for restart interval (no-op if not using restarts) */
/* Account for restart interval if using restarts */
if (cinfo->restart_interval)
entropy->restarts_to_go--;
return TRUE;
@ -915,7 +918,8 @@ decode_mcu_AC_refine (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
huff_entropy_ptr entropy = (huff_entropy_ptr) cinfo->entropy;
register int s, k, r;
unsigned int EOBRUN;
int Se, p1, m1;
int Se;
JCOEF p1, m1;
const int * natural_order;
JBLOCKROW block;
JCOEFPTR thiscoef;
@ -937,11 +941,11 @@ decode_mcu_AC_refine (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
Se = cinfo->Se;
p1 = 1 << cinfo->Al; /* 1 in the bit position being coded */
m1 = (-1) << cinfo->Al; /* -1 in the bit position being coded */
m1 = -p1; /* -1 in the bit position being coded */
natural_order = cinfo->natural_order;
/* Load up working state */
BITREAD_LOAD_STATE(cinfo,entropy->bitstate);
BITREAD_LOAD_STATE(cinfo, entropy->bitstate);
EOBRUN = entropy->saved.EOBRUN; /* only part of saved state we need */
/* There is always only one block per MCU */
@ -1043,11 +1047,12 @@ decode_mcu_AC_refine (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
}
/* Completed MCU, so update state */
BITREAD_SAVE_STATE(cinfo,entropy->bitstate);
BITREAD_SAVE_STATE(cinfo, entropy->bitstate);
entropy->saved.EOBRUN = EOBRUN; /* only part of saved state we need */
}
/* Account for restart interval (no-op if not using restarts) */
/* Account for restart interval if using restarts */
if (cinfo->restart_interval)
entropy->restarts_to_go--;
return TRUE;
@ -1091,7 +1096,7 @@ decode_mcu_sub (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
Se = cinfo->lim_Se;
/* Load up working state */
BITREAD_LOAD_STATE(cinfo,entropy->bitstate);
BITREAD_LOAD_STATE(cinfo, entropy->bitstate);
ASSIGN_STATE(state, entropy->saved);
/* Outer loop handles each block in the MCU */
@ -1178,11 +1183,12 @@ decode_mcu_sub (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
}
/* Completed MCU, so update state */
BITREAD_SAVE_STATE(cinfo,entropy->bitstate);
BITREAD_SAVE_STATE(cinfo, entropy->bitstate);
ASSIGN_STATE(entropy->saved, state);
}
/* Account for restart interval (no-op if not using restarts) */
/* Account for restart interval if using restarts */
if (cinfo->restart_interval)
entropy->restarts_to_go--;
return TRUE;
@ -1215,7 +1221,7 @@ decode_mcu (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
if (! entropy->insufficient_data) {
/* Load up working state */
BITREAD_LOAD_STATE(cinfo,entropy->bitstate);
BITREAD_LOAD_STATE(cinfo, entropy->bitstate);
ASSIGN_STATE(state, entropy->saved);
/* Outer loop handles each block in the MCU */
@ -1302,11 +1308,12 @@ decode_mcu (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
}
/* Completed MCU, so update state */
BITREAD_SAVE_STATE(cinfo,entropy->bitstate);
BITREAD_SAVE_STATE(cinfo, entropy->bitstate);
ASSIGN_STATE(entropy->saved, state);
}
/* Account for restart interval (no-op if not using restarts) */
/* Account for restart interval if using restarts */
if (cinfo->restart_interval)
entropy->restarts_to_go--;
return TRUE;
@ -1343,11 +1350,11 @@ start_pass_huff_decoder (j_decompress_ptr cinfo)
goto bad;
}
if (cinfo->Al > 13) { /* need not check for < 0 */
/* Arguably the maximum Al value should be less than 13 for 8-bit precision,
* but the spec doesn't say so, and we try to be liberal about what we
* accept. Note: large Al values could result in out-of-range DC
* coefficients during early scans, leading to bizarre displays due to
* overflows in the IDCT math. But we won't crash.
/* Arguably the maximum Al value should be less than 13 for 8-bit
* precision, but the spec doesn't say so, and we try to be liberal
* about what we accept. Note: large Al values could result in
* out-of-range DC coefficients during early scans, leading to bizarre
* displays due to overflows in the IDCT math. But we won't crash.
*/
bad:
ERREXIT4(cinfo, JERR_BAD_PROGRESSION,
@ -1451,7 +1458,8 @@ start_pass_huff_decoder (j_decompress_ptr cinfo)
compptr = cinfo->cur_comp_info[ci];
/* Precalculate which table to use for each block */
entropy->dc_cur_tbls[blkn] = entropy->dc_derived_tbls[compptr->dc_tbl_no];
entropy->ac_cur_tbls[blkn] = entropy->ac_derived_tbls[compptr->ac_tbl_no];
entropy->ac_cur_tbls[blkn] = /* AC needs no table when not present */
cinfo->lim_Se ? entropy->ac_derived_tbls[compptr->ac_tbl_no] : NULL;
/* Decide whether we really care about the coefficient values */
if (compptr->component_needed) {
ci = compptr->DCT_v_scaled_size;
@ -1494,7 +1502,6 @@ start_pass_huff_decoder (j_decompress_ptr cinfo)
if (ci <= 0 || ci > 8) ci = 8;
if (i <= 0 || i > 8) i = 8;
entropy->coef_limit[blkn] = 1 + jpeg_zigzag_order[ci - 1][i - 1];
break;
}
} else {
entropy->coef_limit[blkn] = 0;
@ -1522,9 +1529,8 @@ jinit_huff_decoder (j_decompress_ptr cinfo)
huff_entropy_ptr entropy;
int i;
entropy = (huff_entropy_ptr)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
SIZEOF(huff_entropy_decoder));
entropy = (huff_entropy_ptr) (*cinfo->mem->alloc_small)
((j_common_ptr) cinfo, JPOOL_IMAGE, SIZEOF(huff_entropy_decoder));
cinfo->entropy = &entropy->pub;
entropy->pub.start_pass = start_pass_huff_decoder;
entropy->pub.finish_pass = finish_pass_huff;
@ -1532,9 +1538,9 @@ jinit_huff_decoder (j_decompress_ptr cinfo)
if (cinfo->progressive_mode) {
/* Create progression status table */
int *coef_bit_ptr, ci;
cinfo->coef_bits = (int (*)[DCTSIZE2])
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
cinfo->num_components*DCTSIZE2*SIZEOF(int));
cinfo->coef_bits = (int (*)[DCTSIZE2]) (*cinfo->mem->alloc_small)
((j_common_ptr) cinfo, JPOOL_IMAGE,
cinfo->num_components * DCTSIZE2 * SIZEOF(int));
coef_bit_ptr = & cinfo->coef_bits[0][0];
for (ci = 0; ci < cinfo->num_components; ci++)
for (i = 0; i < DCTSIZE2; i++)
@ -1545,7 +1551,7 @@ jinit_huff_decoder (j_decompress_ptr cinfo)
entropy->derived_tbls[i] = NULL;
}
} else {
/* Mark tables unallocated */
/* Mark derived tables unallocated */
for (i = 0; i < NUM_HUFF_TBLS; i++) {
entropy->dc_derived_tbls[i] = entropy->ac_derived_tbls[i] = NULL;
}

20
jpeg/jdmarker.c
View File

@ -2,7 +2,7 @@
* jdmarker.c
*
* Copyright (C) 1991-1998, Thomas G. Lane.
* Modified 2009-2013 by Guido Vollbeding.
* Modified 2009-2019 by Guido Vollbeding.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
@ -496,8 +496,6 @@ get_dht (j_decompress_ptr cinfo)
if (count > 256 || ((INT32) count) > length)
ERREXIT(cinfo, JERR_BAD_HUFF_TABLE);
MEMZERO(huffval, SIZEOF(huffval)); /* pre-zero array for later copy */
for (i = 0; i < count; i++)
INPUT_BYTE(cinfo, huffval[i], return FALSE);
@ -517,7 +515,8 @@ get_dht (j_decompress_ptr cinfo)
*htblptr = jpeg_alloc_huff_table((j_common_ptr) cinfo);
MEMCOPY((*htblptr)->bits, bits, SIZEOF((*htblptr)->bits));
MEMCOPY((*htblptr)->huffval, huffval, SIZEOF((*htblptr)->huffval));
if (count > 0)
MEMCOPY((*htblptr)->huffval, huffval, count * SIZEOF(UINT8));
}
if (length != 0)
@ -577,14 +576,14 @@ get_dqt (j_decompress_ptr cinfo)
count = DCTSIZE2;
}
switch (count) {
switch ((int) count) {
case (2*2): natural_order = jpeg_natural_order2; break;
case (3*3): natural_order = jpeg_natural_order3; break;
case (4*4): natural_order = jpeg_natural_order4; break;
case (5*5): natural_order = jpeg_natural_order5; break;
case (6*6): natural_order = jpeg_natural_order6; break;
case (7*7): natural_order = jpeg_natural_order7; break;
default: natural_order = jpeg_natural_order; break;
default: natural_order = jpeg_natural_order;
}
for (i = 0; i < count; i++) {
@ -784,7 +783,6 @@ examine_app0 (j_decompress_ptr cinfo, JOCTET FAR * data,
default:
TRACEMS2(cinfo, 1, JTRC_JFIF_EXTENSION,
GETJOCTET(data[5]), (int) totallen);
break;
}
} else {
/* Start of APP0 does not match "JFIF" or "JFXX", or too short */
@ -858,7 +856,6 @@ get_interesting_appn (j_decompress_ptr cinfo)
default:
/* can't get here unless jpeg_save_markers chooses wrong processor */
ERREXIT1(cinfo, JERR_UNKNOWN_MARKER, cinfo->unread_marker);
break;
}
/* skip any remaining data -- could be lots */
@ -964,7 +961,6 @@ save_marker (j_decompress_ptr cinfo)
default:
TRACEMS2(cinfo, 1, JTRC_MISC_MARKER, cinfo->unread_marker,
(int) (data_length + length));
break;
}
/* skip any remaining data -- could be lots */
@ -1240,7 +1236,6 @@ read_markers (j_decompress_ptr cinfo)
* ought to change!
*/
ERREXIT1(cinfo, JERR_UNKNOWN_MARKER, cinfo->unread_marker);
break;
}
/* Successfully processed marker, so reset state variable */
cinfo->unread_marker = 0;
@ -1416,9 +1411,8 @@ jinit_marker_reader (j_decompress_ptr cinfo)
int i;
/* Create subobject in permanent pool */
marker = (my_marker_ptr)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
SIZEOF(my_marker_reader));
marker = (my_marker_ptr) (*cinfo->mem->alloc_small)
((j_common_ptr) cinfo, JPOOL_PERMANENT, SIZEOF(my_marker_reader));
cinfo->marker = &marker->pub;
/* Initialize public method pointers */
marker->pub.reset_marker_reader = reset_marker_reader;

25
jpeg/jdmaster.c
View File

@ -2,7 +2,7 @@
* jdmaster.c
*
* Copyright (C) 1991-1997, Thomas G. Lane.
* Modified 2002-2017 by Guido Vollbeding.
* Modified 2002-2019 by Guido Vollbeding.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
@ -104,7 +104,7 @@ jpeg_calc_output_dimensions (j_decompress_ptr cinfo)
*/
{
#ifdef IDCT_SCALING_SUPPORTED
int ci;
int ci, ssize;
jpeg_component_info *compptr;
#endif
@ -124,17 +124,21 @@ jpeg_calc_output_dimensions (j_decompress_ptr cinfo)
*/
for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
ci++, compptr++) {
int ssize = 1;
ssize = 1;
if (! cinfo->raw_data_out)
while (cinfo->min_DCT_h_scaled_size * ssize <=
(cinfo->do_fancy_upsampling ? DCTSIZE : DCTSIZE / 2) &&
(cinfo->max_h_samp_factor % (compptr->h_samp_factor * ssize * 2)) == 0) {
(cinfo->max_h_samp_factor % (compptr->h_samp_factor * ssize * 2)) ==
0) {
ssize = ssize * 2;
}
compptr->DCT_h_scaled_size = cinfo->min_DCT_h_scaled_size * ssize;
ssize = 1;
if (! cinfo->raw_data_out)
while (cinfo->min_DCT_v_scaled_size * ssize <=
(cinfo->do_fancy_upsampling ? DCTSIZE : DCTSIZE / 2) &&
(cinfo->max_v_samp_factor % (compptr->v_samp_factor * ssize * 2)) == 0) {
(cinfo->max_v_samp_factor % (compptr->v_samp_factor * ssize * 2)) ==
0) {
ssize = ssize * 2;
}
compptr->DCT_v_scaled_size = cinfo->min_DCT_v_scaled_size * ssize;
@ -144,13 +148,10 @@ jpeg_calc_output_dimensions (j_decompress_ptr cinfo)
compptr->DCT_h_scaled_size = compptr->DCT_v_scaled_size * 2;
else if (compptr->DCT_v_scaled_size > compptr->DCT_h_scaled_size * 2)
compptr->DCT_v_scaled_size = compptr->DCT_h_scaled_size * 2;
}
/* Recompute downsampled dimensions of components;
* application needs to know these if using raw downsampled data.
*/
for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
ci++, compptr++) {
/* Size in samples, after IDCT scaling */
compptr->downsampled_width = (JDIMENSION)
jdiv_round_up((long) cinfo->image_width *
@ -172,8 +173,10 @@ jpeg_calc_output_dimensions (j_decompress_ptr cinfo)
break;
case JCS_RGB:
case JCS_BG_RGB:
#if RGB_PIXELSIZE != 3
cinfo->out_color_components = RGB_PIXELSIZE;
break;
#endif /* else share code with YCbCr */
case JCS_YCbCr:
case JCS_BG_YCC:
cinfo->out_color_components = 3;
@ -184,7 +187,6 @@ jpeg_calc_output_dimensions (j_decompress_ptr cinfo)
break;
default: /* else must be same colorspace as in file */
cinfo->out_color_components = cinfo->num_components;
break;
}
cinfo->output_components = (cinfo->quantize_colors ? 1 :
cinfo->out_color_components);
@ -525,9 +527,8 @@ jinit_master_decompress (j_decompress_ptr cinfo)
{
my_master_ptr master;
master = (my_master_ptr)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
SIZEOF(my_decomp_master));
master = (my_master_ptr) (*cinfo->mem->alloc_small)
((j_common_ptr) cinfo, JPOOL_IMAGE, SIZEOF(my_decomp_master));
cinfo->master = &master->pub;
master->pub.prepare_for_output_pass = prepare_for_output_pass;
master->pub.finish_output_pass = finish_output_pass;

65
jpeg/jdmerge.c
View File

@ -2,7 +2,7 @@
* jdmerge.c
*
* Copyright (C) 1994-1996, Thomas G. Lane.
* Modified 2013-2017 by Guido Vollbeding.
* Modified 2013-2019 by Guido Vollbeding.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
@ -95,28 +95,22 @@ build_ycc_rgb_table (j_decompress_ptr cinfo)
INT32 x;
SHIFT_TEMPS
upsample->Cr_r_tab = (int *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
(MAXJSAMPLE+1) * SIZEOF(int));
upsample->Cb_b_tab = (int *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
(MAXJSAMPLE+1) * SIZEOF(int));
upsample->Cr_g_tab = (INT32 *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
(MAXJSAMPLE+1) * SIZEOF(INT32));
upsample->Cb_g_tab = (INT32 *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
(MAXJSAMPLE+1) * SIZEOF(INT32));
upsample->Cr_r_tab = (int *) (*cinfo->mem->alloc_small)
((j_common_ptr) cinfo, JPOOL_IMAGE, (MAXJSAMPLE+1) * SIZEOF(int));
upsample->Cb_b_tab = (int *) (*cinfo->mem->alloc_small)
((j_common_ptr) cinfo, JPOOL_IMAGE, (MAXJSAMPLE+1) * SIZEOF(int));
upsample->Cr_g_tab = (INT32 *) (*cinfo->mem->alloc_small)
((j_common_ptr) cinfo, JPOOL_IMAGE, (MAXJSAMPLE+1) * SIZEOF(INT32));
upsample->Cb_g_tab = (INT32 *) (*cinfo->mem->alloc_small)
((j_common_ptr) cinfo, JPOOL_IMAGE, (MAXJSAMPLE+1) * SIZEOF(INT32));
for (i = 0, x = -CENTERJSAMPLE; i <= MAXJSAMPLE; i++, x++) {
/* i is the actual input pixel value, in the range 0..MAXJSAMPLE */
/* The Cb or Cr value we are thinking of is x = i - CENTERJSAMPLE */
/* Cr=>R value is nearest int to 1.402 * x */
upsample->Cr_r_tab[i] = (int)
RIGHT_SHIFT(FIX(1.402) * x + ONE_HALF, SCALEBITS);
upsample->Cr_r_tab[i] = (int) DESCALE(FIX(1.402) * x, SCALEBITS);
/* Cb=>B value is nearest int to 1.772 * x */
upsample->Cb_b_tab[i] = (int)
RIGHT_SHIFT(FIX(1.772) * x + ONE_HALF, SCALEBITS);
upsample->Cb_b_tab[i] = (int) DESCALE(FIX(1.772) * x, SCALEBITS);
/* Cr=>G value is scaled-up -0.714136286 * x */
upsample->Cr_g_tab[i] = (- FIX(0.714136286)) * x;
/* Cb=>G value is scaled-up -0.344136286 * x */
@ -135,28 +129,22 @@ build_bg_ycc_rgb_table (j_decompress_ptr cinfo)
INT32 x;
SHIFT_TEMPS
upsample->Cr_r_tab = (int *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
(MAXJSAMPLE+1) * SIZEOF(int));
upsample->Cb_b_tab = (int *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
(MAXJSAMPLE+1) * SIZEOF(int));
upsample->Cr_g_tab = (INT32 *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
(MAXJSAMPLE+1) * SIZEOF(INT32));
upsample->Cb_g_tab = (INT32 *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
(MAXJSAMPLE+1) * SIZEOF(INT32));
upsample->Cr_r_tab = (int *) (*cinfo->mem->alloc_small)
((j_common_ptr) cinfo, JPOOL_IMAGE, (MAXJSAMPLE+1) * SIZEOF(int));
upsample->Cb_b_tab = (int *) (*cinfo->mem->alloc_small)
((j_common_ptr) cinfo, JPOOL_IMAGE, (MAXJSAMPLE+1) * SIZEOF(int));
upsample->Cr_g_tab = (INT32 *) (*cinfo->mem->alloc_small)
((j_common_ptr) cinfo, JPOOL_IMAGE, (MAXJSAMPLE+1) * SIZEOF(INT32));
upsample->Cb_g_tab = (INT32 *) (*cinfo->mem->alloc_small)
((j_common_ptr) cinfo, JPOOL_IMAGE, (MAXJSAMPLE+1) * SIZEOF(INT32));
for (i = 0, x = -CENTERJSAMPLE; i <= MAXJSAMPLE; i++, x++) {
/* i is the actual input pixel value, in the range 0..MAXJSAMPLE */
/* The Cb or Cr value we are thinking of is x = i - CENTERJSAMPLE */
/* Cr=>R value is nearest int to 2.804 * x */
upsample->Cr_r_tab[i] = (int)
RIGHT_SHIFT(FIX(2.804) * x + ONE_HALF, SCALEBITS);
upsample->Cr_r_tab[i] = (int) DESCALE(FIX(2.804) * x, SCALEBITS);
/* Cb=>B value is nearest int to 3.544 * x */
upsample->Cb_b_tab[i] = (int)
RIGHT_SHIFT(FIX(3.544) * x + ONE_HALF, SCALEBITS);
upsample->Cb_b_tab[i] = (int) DESCALE(FIX(3.544) * x, SCALEBITS);
/* Cr=>G value is scaled-up -1.428272572 * x */
upsample->Cr_g_tab[i] = (- FIX(1.428272572)) * x;
/* Cb=>G value is scaled-up -0.688272572 * x */
@ -419,9 +407,8 @@ jinit_merged_upsampler (j_decompress_ptr cinfo)
{
my_upsample_ptr upsample;
upsample = (my_upsample_ptr)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
SIZEOF(my_upsampler));
upsample = (my_upsample_ptr) (*cinfo->mem->alloc_small)
((j_common_ptr) cinfo, JPOOL_IMAGE, SIZEOF(my_upsampler));
cinfo->upsample = &upsample->pub;
upsample->pub.start_pass = start_pass_merged_upsample;
upsample->pub.need_context_rows = FALSE;
@ -432,9 +419,9 @@ jinit_merged_upsampler (j_decompress_ptr cinfo)
upsample->pub.upsample = merged_2v_upsample;
upsample->upmethod = h2v2_merged_upsample;
/* Allocate a spare row buffer */
upsample->spare_row = (JSAMPROW)
(*cinfo->mem->alloc_large) ((j_common_ptr) cinfo, JPOOL_IMAGE,
(size_t) (upsample->out_row_width * SIZEOF(JSAMPLE)));
upsample->spare_row = (JSAMPROW) (*cinfo->mem->alloc_large)
((j_common_ptr) cinfo, JPOOL_IMAGE,
(size_t) upsample->out_row_width * SIZEOF(JSAMPLE));
} else {
upsample->pub.upsample = merged_1v_upsample;
upsample->upmethod = h2v1_merged_upsample;

4
jpeg/jerror.h
View File

@ -2,7 +2,7 @@
* jerror.h
*
* Copyright (C) 1994-1997, Thomas G. Lane.
* Modified 1997-2012 by Guido Vollbeding.
* Modified 1997-2018 by Guido Vollbeding.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
@ -84,7 +84,7 @@ JMESSAGE(JERR_EOI_EXPECTED, "Didn't expect more than one scan")
JMESSAGE(JERR_FILE_READ, "Input file read error")
JMESSAGE(JERR_FILE_WRITE, "Output file write error --- out of disk space?")
JMESSAGE(JERR_FRACT_SAMPLE_NOTIMPL, "Fractional sampling not implemented yet")
JMESSAGE(JERR_HUFF_CLEN_OVERFLOW, "Huffman code size table overflow")
JMESSAGE(JERR_HUFF_CLEN_OUTOFBOUNDS, "Huffman code size table out of bounds")
JMESSAGE(JERR_HUFF_MISSING_CODE, "Missing Huffman code table entry")
JMESSAGE(JERR_IMAGE_TOO_BIG, "Maximum supported image dimension is %u pixels")
JMESSAGE(JERR_INPUT_EMPTY, "Empty input file")

112
jpeg/jfdctint.c
View File

@ -2,7 +2,7 @@
* jfdctint.c
*
* Copyright (C) 1991-1996, Thomas G. Lane.
* Modification developed 2003-2015 by Guido Vollbeding.
* Modification developed 2003-2018 by Guido Vollbeding.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
@ -3261,78 +3261,84 @@ jpeg_fdct_6x3 (DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)
GLOBAL(void)
jpeg_fdct_4x2 (DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)
{
INT32 tmp0, tmp1;
INT32 tmp10, tmp11;
DCTELEM *dataptr;
DCTELEM tmp0, tmp2, tmp10, tmp12, tmp4, tmp5;
INT32 tmp1, tmp3, tmp11, tmp13;
INT32 z1, z2, z3;
JSAMPROW elemptr;
int ctr;
SHIFT_TEMPS
/* Pre-zero output coefficient block. */
MEMZERO(data, SIZEOF(DCTELEM) * DCTSIZE2);
/* Pass 1: process rows.
* Note results are scaled up by sqrt(8) compared to a true DCT;
* furthermore, we scale the results by 2**PASS1_BITS.
* We must also scale the output by (8/4)*(8/2) = 2**3, which we add here.
* Note results are scaled up by sqrt(8) compared to a true DCT.
* 4-point FDCT kernel,
* cK represents sqrt(2) * cos(K*pi/16) [refers to 8-point FDCT].
*/
dataptr = data;
for (ctr = 0; ctr < 2; ctr++) {
elemptr = sample_data[ctr] + start_col;
/* Row 0 */
elemptr = sample_data[0] + start_col;
/* Even part */
tmp0 = GETJSAMPLE(elemptr[0]) + GETJSAMPLE(elemptr[3]);
tmp1 = GETJSAMPLE(elemptr[1]) + GETJSAMPLE(elemptr[2]);
tmp4 = GETJSAMPLE(elemptr[0]) + GETJSAMPLE(elemptr[3]);
tmp5 = GETJSAMPLE(elemptr[1]) + GETJSAMPLE(elemptr[2]);
tmp10 = GETJSAMPLE(elemptr[0]) - GETJSAMPLE(elemptr[3]);
tmp11 = GETJSAMPLE(elemptr[1]) - GETJSAMPLE(elemptr[2]);
/* Apply unsigned->signed conversion. */
dataptr[0] = (DCTELEM)
((tmp0 + tmp1 - 4 * CENTERJSAMPLE) << (PASS1_BITS+3));
dataptr[2] = (DCTELEM) ((tmp0 - tmp1) << (PASS1_BITS+3));
tmp0 = tmp4 + tmp5;
tmp2 = tmp4 - tmp5;
/* Odd part */
tmp0 = MULTIPLY(tmp10 + tmp11, FIX_0_541196100); /* c6 */
z2 = GETJSAMPLE(elemptr[0]) - GETJSAMPLE(elemptr[3]);
z3 = GETJSAMPLE(elemptr[1]) - GETJSAMPLE(elemptr[2]);
z1 = MULTIPLY(z2 + z3, FIX_0_541196100); /* c6 */
/* Add fudge factor here for final descale. */
tmp0 += ONE << (CONST_BITS-PASS1_BITS-4);
z1 += ONE << (CONST_BITS-3-1);
tmp1 = z1 + MULTIPLY(z2, FIX_0_765366865); /* c2-c6 */
tmp3 = z1 - MULTIPLY(z3, FIX_1_847759065); /* c2+c6 */
dataptr[1] = (DCTELEM)
RIGHT_SHIFT(tmp0 + MULTIPLY(tmp10, FIX_0_765366865), /* c2-c6 */
CONST_BITS-PASS1_BITS-3);
dataptr[3] = (DCTELEM)
RIGHT_SHIFT(tmp0 - MULTIPLY(tmp11, FIX_1_847759065), /* c2+c6 */
CONST_BITS-PASS1_BITS-3);
/* Row 1 */
elemptr = sample_data[1] + start_col;
dataptr += DCTSIZE; /* advance pointer to next row */
}
/* Even part */
tmp4 = GETJSAMPLE(elemptr[0]) + GETJSAMPLE(elemptr[3]);
tmp5 = GETJSAMPLE(elemptr[1]) + GETJSAMPLE(elemptr[2]);
tmp10 = tmp4 + tmp5;
tmp12 = tmp4 - tmp5;
/* Odd part */
z2 = GETJSAMPLE(elemptr[0]) - GETJSAMPLE(elemptr[3]);
z3 = GETJSAMPLE(elemptr[1]) - GETJSAMPLE(elemptr[2]);
z1 = MULTIPLY(z2 + z3, FIX_0_541196100); /* c6 */
tmp11 = z1 + MULTIPLY(z2, FIX_0_765366865); /* c2-c6 */
tmp13 = z1 - MULTIPLY(z3, FIX_1_847759065); /* c2+c6 */
/* Pass 2: process columns.
* We remove the PASS1_BITS scaling, but leave the results scaled up
* by an overall factor of 8.
* We leave the results scaled up by an overall factor of 8.
* We must also scale the output by (8/4)*(8/2) = 2**3.
*/
dataptr = data;
for (ctr = 0; ctr < 4; ctr++) {
/* Even part */
/* Column 0 */
/* Apply unsigned->signed conversion. */
data[DCTSIZE*0] = (tmp0 + tmp10 - 8 * CENTERJSAMPLE) << 3;
data[DCTSIZE*1] = (tmp0 - tmp10) << 3;
/* Add fudge factor here for final descale. */
tmp0 = dataptr[DCTSIZE*0] + (ONE << (PASS1_BITS-1));
tmp1 = dataptr[DCTSIZE*1];
/* Column 1 */
data[DCTSIZE*0+1] = (DCTELEM) RIGHT_SHIFT(tmp1 + tmp11, CONST_BITS-3);
data[DCTSIZE*1+1] = (DCTELEM) RIGHT_SHIFT(tmp1 - tmp11, CONST_BITS-3);
dataptr[DCTSIZE*0] = (DCTELEM) RIGHT_SHIFT(tmp0 + tmp1, PASS1_BITS);
/* Column 2 */
data[DCTSIZE*0+2] = (tmp2 + tmp12) << 3;
data[DCTSIZE*1+2] = (tmp2 - tmp12) << 3;
/* Odd part */
dataptr[DCTSIZE*1] = (DCTELEM) RIGHT_SHIFT(tmp0 - tmp1, PASS1_BITS);
dataptr++; /* advance pointer to next column */
}
/* Column 3 */
data[DCTSIZE*0+3] = (DCTELEM) RIGHT_SHIFT(tmp3 + tmp13, CONST_BITS-3);
data[DCTSIZE*1+3] = (DCTELEM) RIGHT_SHIFT(tmp3 - tmp13, CONST_BITS-3);
}
@ -4312,7 +4318,6 @@ jpeg_fdct_2x4 (DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)
/* Pass 1: process rows.
* Note results are scaled up by sqrt(8) compared to a true DCT.
* We must also scale the output by (8/2)*(8/4) = 2**3, which we add here.
*/
dataptr = data;
@ -4325,17 +4330,18 @@ jpeg_fdct_2x4 (DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)
tmp1 = GETJSAMPLE(elemptr[1]);
/* Apply unsigned->signed conversion. */
dataptr[0] = (DCTELEM) ((tmp0 + tmp1 - 2 * CENTERJSAMPLE) << 3);
dataptr[0] = (DCTELEM) (tmp0 + tmp1 - 2 * CENTERJSAMPLE);
/* Odd part */
dataptr[1] = (DCTELEM) ((tmp0 - tmp1) << 3);
dataptr[1] = (DCTELEM) (tmp0 - tmp1);
dataptr += DCTSIZE; /* advance pointer to next row */
}
/* Pass 2: process columns.
* We leave the results scaled up by an overall factor of 8.
* We must also scale the output by (8/2)*(8/4) = 2**3.
* 4-point FDCT kernel,
* cK represents sqrt(2) * cos(K*pi/16) [refers to 8-point FDCT].
*/
@ -4350,21 +4356,21 @@ jpeg_fdct_2x4 (DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)
tmp10 = dataptr[DCTSIZE*0] - dataptr[DCTSIZE*3];
tmp11 = dataptr[DCTSIZE*1] - dataptr[DCTSIZE*2];
dataptr[DCTSIZE*0] = (DCTELEM) (tmp0 + tmp1);
dataptr[DCTSIZE*2] = (DCTELEM) (tmp0 - tmp1);
dataptr[DCTSIZE*0] = (DCTELEM) ((tmp0 + tmp1) << 3);
dataptr[DCTSIZE*2] = (DCTELEM) ((tmp0 - tmp1) << 3);
/* Odd part */
tmp0 = MULTIPLY(tmp10 + tmp11, FIX_0_541196100); /* c6 */
/* Add fudge factor here for final descale. */
tmp0 += ONE << (CONST_BITS-1);
tmp0 += ONE << (CONST_BITS-3-1);
dataptr[DCTSIZE*1] = (DCTELEM)
RIGHT_SHIFT(tmp0 + MULTIPLY(tmp10, FIX_0_765366865), /* c2-c6 */
CONST_BITS);
CONST_BITS-3);
dataptr[DCTSIZE*3] = (DCTELEM)
RIGHT_SHIFT(tmp0 - MULTIPLY(tmp11, FIX_1_847759065), /* c2+c6 */
CONST_BITS);
CONST_BITS-3);
dataptr++; /* advance pointer to next column */
}

12
jpeg/jidctint.c
View File

@ -2,7 +2,7 @@
* jidctint.c
*
* Copyright (C) 1991-1998, Thomas G. Lane.
* Modification developed 2002-2016 by Guido Vollbeding.
* Modification developed 2002-2018 by Guido Vollbeding.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
@ -1474,7 +1474,7 @@ jpeg_idct_10x10 (j_decompress_ptr cinfo, jpeg_component_info * compptr,
/*
* Perform dequantization and inverse DCT on one block of coefficients,
* producing a 11x11 output block.
* producing an 11x11 output block.
*
* Optimized algorithm with 24 multiplications in the 1-D kernel.
* cK represents sqrt(2) * cos(K*pi/22).
@ -3675,7 +3675,7 @@ jpeg_idct_10x5 (j_decompress_ptr cinfo, jpeg_component_info * compptr,
/*
* Perform dequantization and inverse DCT on one block of coefficients,
* producing a 8x4 output block.
* producing an 8x4 output block.
*
* 4-point IDCT in pass 1 (columns), 8-point in pass 2 (rows).
*/
@ -3835,7 +3835,7 @@ jpeg_idct_8x4 (j_decompress_ptr cinfo, jpeg_component_info * compptr,
/*
* Perform dequantization and inverse DCT on one block of coefficients,
* producing a reduced-size 6x3 output block.
* producing a 6x3 output block.
*
* 3-point IDCT in pass 1 (columns), 6-point in pass 2 (rows).
*/
@ -4082,7 +4082,7 @@ jpeg_idct_2x1 (j_decompress_ptr cinfo, jpeg_component_info * compptr,
/*
* Perform dequantization and inverse DCT on one block of coefficients,
* producing a 8x16 output block.
* producing an 8x16 output block.
*
* 16-point IDCT in pass 1 (columns), 8-point in pass 2 (rows).
*/
@ -5004,7 +5004,7 @@ jpeg_idct_4x8 (j_decompress_ptr cinfo, jpeg_component_info * compptr,
/*
* Perform dequantization and inverse DCT on one block of coefficients,
* producing a reduced-size 3x6 output block.
* producing a 3x6 output block.
*
* 6-point IDCT in pass 1 (columns), 3-point in pass 2 (rows).
*/

60
jpeg/jmemmgr.c
View File

@ -2,7 +2,7 @@
* jmemmgr.c
*
* Copyright (C) 1991-1997, Thomas G. Lane.
* Modified 2011-2012 by Guido Vollbeding.
* Modified 2011-2019 by Guido Vollbeding.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
@ -130,7 +130,7 @@ typedef struct {
jvirt_barray_ptr virt_barray_list;
/* This counts total space obtained from jpeg_get_small/large */
long total_space_allocated;
size_t total_space_allocated;
/* alloc_sarray and alloc_barray set this value for use by virtual
* array routines.
@ -195,7 +195,7 @@ print_mem_stats (j_common_ptr cinfo, int pool_id)
* This is helpful because message parm array can't handle longs.
*/
fprintf(stderr, "Freeing pool %d, total space = %ld\n",
pool_id, mem->total_space_allocated);
pool_id, (long) mem->total_space_allocated);
for (lhdr_ptr = mem->large_list[pool_id]; lhdr_ptr != NULL;
lhdr_ptr = lhdr_ptr->hdr.next) {
@ -260,11 +260,11 @@ alloc_small (j_common_ptr cinfo, int pool_id, size_t sizeofobject)
{
my_mem_ptr mem = (my_mem_ptr) cinfo->mem;
small_pool_ptr hdr_ptr, prev_hdr_ptr;
char * data_ptr;
size_t odd_bytes, min_request, slop;
char * data_ptr;
/* Check for unsatisfiable request (do now to ensure no overflow below) */
if (sizeofobject > (size_t) (MAX_ALLOC_CHUNK-SIZEOF(small_pool_hdr)))
if (sizeofobject > (size_t) MAX_ALLOC_CHUNK - SIZEOF(small_pool_hdr))
out_of_memory(cinfo, 1); /* request exceeds malloc's ability */
/* Round up the requested size to a multiple of SIZEOF(ALIGN_TYPE) */
@ -293,8 +293,8 @@ alloc_small (j_common_ptr cinfo, int pool_id, size_t sizeofobject)
else
slop = extra_pool_slop[pool_id];
/* Don't ask for more than MAX_ALLOC_CHUNK */
if (slop > (size_t) (MAX_ALLOC_CHUNK-min_request))
slop = (size_t) (MAX_ALLOC_CHUNK-min_request);
if (slop > (size_t) MAX_ALLOC_CHUNK - min_request)
slop = (size_t) MAX_ALLOC_CHUNK - min_request;
/* Try to get space, if fail reduce slop and try again */
for (;;) {
hdr_ptr = (small_pool_ptr) jpeg_get_small(cinfo, min_request + slop);
@ -348,7 +348,7 @@ alloc_large (j_common_ptr cinfo, int pool_id, size_t sizeofobject)
size_t odd_bytes;
/* Check for unsatisfiable request (do now to ensure no overflow below) */
if (sizeofobject > (size_t) (MAX_ALLOC_CHUNK-SIZEOF(large_pool_hdr)))
if (sizeofobject > (size_t) MAX_ALLOC_CHUNK - SIZEOF(large_pool_hdr))
out_of_memory(cinfo, 3); /* request exceeds malloc's ability */
/* Round up the requested size to a multiple of SIZEOF(ALIGN_TYPE) */
@ -404,7 +404,7 @@ alloc_sarray (j_common_ptr cinfo, int pool_id,
long ltemp;
/* Calculate max # of rows allowed in one allocation chunk */
ltemp = (MAX_ALLOC_CHUNK-SIZEOF(large_pool_hdr)) /
ltemp = (MAX_ALLOC_CHUNK - SIZEOF(large_pool_hdr)) /
((long) samplesperrow * SIZEOF(JSAMPLE));
if (ltemp <= 0)
ERREXIT(cinfo, JERR_WIDTH_OVERFLOW);
@ -416,15 +416,14 @@ alloc_sarray (j_common_ptr cinfo, int pool_id,
/* Get space for row pointers (small object) */
result = (JSAMPARRAY) alloc_small(cinfo, pool_id,
(size_t) (numrows * SIZEOF(JSAMPROW)));
(size_t) numrows * SIZEOF(JSAMPROW));
/* Get the rows themselves (large objects) */
currow = 0;
while (currow < numrows) {
rowsperchunk = MIN(rowsperchunk, numrows - currow);
workspace = (JSAMPROW) alloc_large(cinfo, pool_id,
(size_t) ((size_t) rowsperchunk * (size_t) samplesperrow
* SIZEOF(JSAMPLE)));
(size_t) rowsperchunk * (size_t) samplesperrow * SIZEOF(JSAMPLE));
for (i = rowsperchunk; i > 0; i--) {
result[currow++] = workspace;
workspace += samplesperrow;
@ -452,7 +451,7 @@ alloc_barray (j_common_ptr cinfo, int pool_id,
long ltemp;
/* Calculate max # of rows allowed in one allocation chunk */
ltemp = (MAX_ALLOC_CHUNK-SIZEOF(large_pool_hdr)) /
ltemp = (MAX_ALLOC_CHUNK - SIZEOF(large_pool_hdr)) /
((long) blocksperrow * SIZEOF(JBLOCK));
if (ltemp <= 0)
ERREXIT(cinfo, JERR_WIDTH_OVERFLOW);
@ -464,15 +463,14 @@ alloc_barray (j_common_ptr cinfo, int pool_id,
/* Get space for row pointers (small object) */
result = (JBLOCKARRAY) alloc_small(cinfo, pool_id,
(size_t) (numrows * SIZEOF(JBLOCKROW)));
(size_t) numrows * SIZEOF(JBLOCKROW));
/* Get the rows themselves (large objects) */
currow = 0;
while (currow < numrows) {
rowsperchunk = MIN(rowsperchunk, numrows - currow);
workspace = (JBLOCKROW) alloc_large(cinfo, pool_id,
(size_t) ((size_t) rowsperchunk * (size_t) blocksperrow
* SIZEOF(JBLOCK)));
(size_t) rowsperchunk * (size_t) blocksperrow * SIZEOF(JBLOCK));
for (i = rowsperchunk; i > 0; i--) {
result[currow++] = workspace;
workspace += blocksperrow;
@ -585,8 +583,8 @@ realize_virt_arrays (j_common_ptr cinfo)
/* Allocate the in-memory buffers for any unrealized virtual arrays */
{
my_mem_ptr mem = (my_mem_ptr) cinfo->mem;
long space_per_minheight, maximum_space, avail_mem;
long minheights, max_minheights;
long bytesperrow, space_per_minheight, maximum_space;
long avail_mem, minheights, max_minheights;
jvirt_sarray_ptr sptr;
jvirt_barray_ptr bptr;
@ -598,18 +596,16 @@ realize_virt_arrays (j_common_ptr cinfo)
maximum_space = 0;
for (sptr = mem->virt_sarray_list; sptr != NULL; sptr = sptr->next) {
if (sptr->mem_buffer == NULL) { /* if not realized yet */
space_per_minheight += (long) sptr->maxaccess *
(long) sptr->samplesperrow * SIZEOF(JSAMPLE);
maximum_space += (long) sptr->rows_in_array *
(long) sptr->samplesperrow * SIZEOF(JSAMPLE);
bytesperrow = (long) sptr->samplesperrow * SIZEOF(JSAMPLE);
space_per_minheight += (long) sptr->maxaccess * bytesperrow;
maximum_space += (long) sptr->rows_in_array * bytesperrow;
}
}
for (bptr = mem->virt_barray_list; bptr != NULL; bptr = bptr->next) {
if (bptr->mem_buffer == NULL) { /* if not realized yet */
space_per_minheight += (long) bptr->maxaccess *
(long) bptr->blocksperrow * SIZEOF(JBLOCK);
maximum_space += (long) bptr->rows_in_array *
(long) bptr->blocksperrow * SIZEOF(JBLOCK);
bytesperrow = (long) bptr->blocksperrow * SIZEOF(JBLOCK);
space_per_minheight += (long) bptr->maxaccess * bytesperrow;
maximum_space += (long) bptr->rows_in_array * bytesperrow;
}
}
@ -618,7 +614,7 @@ realize_virt_arrays (j_common_ptr cinfo)
/* Determine amount of memory to actually use; this is system-dependent. */
avail_mem = jpeg_mem_available(cinfo, space_per_minheight, maximum_space,
mem->total_space_allocated);
(long) mem->total_space_allocated);
/* If the maximum space needed is available, make all the buffers full
* height; otherwise parcel it out with the same number of minheights
@ -694,7 +690,7 @@ do_sarray_io (j_common_ptr cinfo, jvirt_sarray_ptr ptr, boolean writing)
long bytesperrow, file_offset, byte_count, rows, thisrow, i;
bytesperrow = (long) ptr->samplesperrow * SIZEOF(JSAMPLE);
file_offset = ptr->cur_start_row * bytesperrow;
file_offset = (long) ptr->cur_start_row * bytesperrow;
/* Loop to read or write each allocation chunk in mem_buffer */
for (i = 0; i < (long) ptr->rows_in_mem; i += ptr->rowsperchunk) {
/* One chunk, but check for short chunk at end of buffer */
@ -727,7 +723,7 @@ do_barray_io (j_common_ptr cinfo, jvirt_barray_ptr ptr, boolean writing)
long bytesperrow, file_offset, byte_count, rows, thisrow, i;
bytesperrow = (long) ptr->blocksperrow * SIZEOF(JBLOCK);
file_offset = ptr->cur_start_row * bytesperrow;
file_offset = (long) ptr->cur_start_row * bytesperrow;
/* Loop to read or write each allocation chunk in mem_buffer */
for (i = 0; i < (long) ptr->rows_in_mem; i += ptr->rowsperchunk) {
/* One chunk, but check for short chunk at end of buffer */
@ -771,7 +767,7 @@ access_virt_sarray (j_common_ptr cinfo, jvirt_sarray_ptr ptr,
/* Make the desired part of the virtual array accessible */
if (start_row < ptr->cur_start_row ||
end_row > ptr->cur_start_row+ptr->rows_in_mem) {
end_row > ptr->cur_start_row + ptr->rows_in_mem) {
if (! ptr->b_s_open)
ERREXIT(cinfo, JERR_VIRTUAL_BUG);
/* Flush old buffer contents if necessary */
@ -856,7 +852,7 @@ access_virt_barray (j_common_ptr cinfo, jvirt_barray_ptr ptr,
/* Make the desired part of the virtual array accessible */
if (start_row < ptr->cur_start_row ||
end_row > ptr->cur_start_row+ptr->rows_in_mem) {
end_row > ptr->cur_start_row + ptr->rows_in_mem) {
if (! ptr->b_s_open)
ERREXIT(cinfo, JERR_VIRTUAL_BUG);
/* Flush old buffer contents if necessary */
@ -1093,7 +1089,7 @@ jinit_memory_mgr (j_common_ptr cinfo)
mem->total_space_allocated = SIZEOF(my_memory_mgr);
/* Declare ourselves open for business */
cinfo->mem = & mem->pub;
cinfo->mem = &mem->pub;
/* Check for an environment variable JPEGMEM; if found, override the
* default max_memory setting from jpeg_mem_init. Note that the

8
jpeg/jmemnobs.c
View File

@ -2,6 +2,7 @@
* jmemnobs.c
*
* Copyright (C) 1992-1996, Thomas G. Lane.
* Modified 2019 by Guido Vollbeding.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
@ -12,7 +13,7 @@
* This is very portable in the sense that it'll compile on almost anything,
* but you'd better have lots of main memory (or virtual memory) if you want
* to process big images.
* Note that the max_memory_to_use option is ignored by this implementation.
* Note that the max_memory_to_use option is respected by this implementation.
*/
#define JPEG_INTERNALS
@ -66,13 +67,16 @@ jpeg_free_large (j_common_ptr cinfo, void FAR * object, size_t sizeofobject)
/*
* This routine computes the total memory space available for allocation.
* Here we always say, "we got all you want bud!"
*/
GLOBAL(long)
jpeg_mem_available (j_common_ptr cinfo, long min_bytes_needed,
long max_bytes_needed, long already_allocated)
{
if (cinfo->mem->max_memory_to_use)
return cinfo->mem->max_memory_to_use - already_allocated;
/* Here we say, "we got all you want bud!" */
return max_bytes_needed;
}

9
jpeg/jpegint.h
View File

@ -2,7 +2,7 @@
* jpegint.h
*
* Copyright (C) 1991-1997, Thomas G. Lane.
* Modified 1997-2017 by Guido Vollbeding.
* Modified 1997-2019 by Guido Vollbeding.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
@ -302,6 +302,13 @@ struct jpeg_color_quantizer {
#define RIGHT_SHIFT(x,shft) ((x) >> (shft))
#endif
/* Descale and correctly round an INT32 value that's scaled by N bits.
* We assume RIGHT_SHIFT rounds towards minus infinity, so adding
* the fudge factor is correct for either sign of X.
*/
#define DESCALE(x,n) RIGHT_SHIFT((x) + ((INT32) 1 << ((n)-1)), n)
/* Short forms of external names for systems with brain-damaged linkers. */

11
jpeg/jpeglib.h
View File

@ -2,7 +2,7 @@
* jpeglib.h
*
* Copyright (C) 1991-1998, Thomas G. Lane.
* Modified 2002-2017 by Guido Vollbeding.
* Modified 2002-2019 by Guido Vollbeding.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
@ -39,7 +39,7 @@ extern "C" {
#define JPEG_LIB_VERSION 90 /* Compatibility version 9.0 */
#define JPEG_LIB_VERSION_MAJOR 9
#define JPEG_LIB_VERSION_MINOR 3
#define JPEG_LIB_VERSION_MINOR 4
/* Various constants determining the sizes of things.
@ -909,6 +909,7 @@ typedef JMETHOD(boolean, jpeg_marker_parser_method, (j_decompress_ptr cinfo));
#define jpeg_suppress_tables jSuppressTables
#define jpeg_alloc_quant_table jAlcQTable
#define jpeg_alloc_huff_table jAlcHTable
#define jpeg_std_huff_table jStdHTable
#define jpeg_start_compress jStrtCompress
#define jpeg_write_scanlines jWrtScanlines
#define jpeg_finish_compress jFinCompress
@ -977,10 +978,10 @@ EXTERN(void) jpeg_stdio_src JPP((j_decompress_ptr cinfo, FILE * infile));
/* Data source and destination managers: memory buffers. */
EXTERN(void) jpeg_mem_dest JPP((j_compress_ptr cinfo,
unsigned char ** outbuffer,
unsigned long * outsize));
size_t * outsize));
EXTERN(void) jpeg_mem_src JPP((j_decompress_ptr cinfo,
const unsigned char * inbuffer,
unsigned long insize));
size_t insize));
/* Default parameter setup for compression */
EXTERN(void) jpeg_set_defaults JPP((j_compress_ptr cinfo));
@ -1005,6 +1006,8 @@ EXTERN(void) jpeg_suppress_tables JPP((j_compress_ptr cinfo,
boolean suppress));
EXTERN(JQUANT_TBL *) jpeg_alloc_quant_table JPP((j_common_ptr cinfo));
EXTERN(JHUFF_TBL *) jpeg_alloc_huff_table JPP((j_common_ptr cinfo));
EXTERN(JHUFF_TBL *) jpeg_std_huff_table JPP((j_common_ptr cinfo,
boolean isDC, int tblno));
/* Main entry points for compression */
EXTERN(void) jpeg_start_compress JPP((j_compress_ptr cinfo,

6
jpeg/jutils.c
View File

@ -2,7 +2,7 @@
* jutils.c
*
* Copyright (C) 1991-1996, Thomas G. Lane.
* Modified 2009-2011 by Guido Vollbeding.
* Modified 2009-2019 by Guido Vollbeding.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
@ -185,7 +185,7 @@ jcopy_sample_rows (JSAMPARRAY input_array, int source_row,
{
register JSAMPROW inptr, outptr;
#ifdef FMEMCOPY
register size_t count = (size_t) (num_cols * SIZEOF(JSAMPLE));
register size_t count = (size_t) num_cols * SIZEOF(JSAMPLE);
#else
register JDIMENSION count;
#endif
@ -213,7 +213,7 @@ jcopy_block_row (JBLOCKROW input_row, JBLOCKROW output_row,
/* Copy a row of coefficient blocks from one place to another. */
{
#ifdef FMEMCOPY
FMEMCOPY(output_row, input_row, num_blocks * (DCTSIZE2 * SIZEOF(JCOEF)));
FMEMCOPY(output_row, input_row, (size_t) num_blocks * (DCTSIZE2 * SIZEOF(JCOEF)));
#else
register JCOEFPTR inptr, outptr;
register long count;

6
jpeg/jversion.h
View File

@ -1,7 +1,7 @@
/*
* jversion.h
*
* Copyright (C) 1991-2018, Thomas G. Lane, Guido Vollbeding.
* Copyright (C) 1991-2020, Thomas G. Lane, Guido Vollbeding.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
@ -9,6 +9,6 @@
*/
#define JVERSION "9c 14-Jan-2018"
#define JVERSION "9d 12-Jan-2020"
#define JCOPYRIGHT "Copyright (C) 2018, Thomas G. Lane, Guido Vollbeding"
#define JCOPYRIGHT "Copyright (C) 2020, Thomas G. Lane, Guido Vollbeding"

51
jpeg/libjpeg.txt
View File

@ -1,6 +1,6 @@
USING THE IJG JPEG LIBRARY
Copyright (C) 1994-2013, Thomas G. Lane, Guido Vollbeding.
Copyright (C) 1994-2019, Thomas G. Lane, Guido Vollbeding.
This file is part of the Independent JPEG Group's software.
For conditions of distribution and use, see the accompanying README file.
@ -2591,8 +2591,8 @@ different sizes. If the image dimensions are not a multiple of the MCU size,
you must also pad the data correctly (usually, this is done by replicating
the last column and/or row). The data must be padded to a multiple of a DCT
block in each component: that is, each downsampled row must contain a
multiple of block_size valid samples, and there must be a multiple of
block_size sample rows for each component. (For applications such as
multiple of DCT_h_scaled_size valid samples, and there must be a multiple of
DCT_v_scaled_size sample rows for each component. (For applications such as
conversion of digital TV images, the standard image size is usually a
multiple of the DCT block size, so that no padding need actually be done.)
@ -2602,8 +2602,6 @@ jpeg_write_scanlines(). Before calling jpeg_start_compress(), you must do
the following:
* Set cinfo->raw_data_in to TRUE. (It is set FALSE by jpeg_set_defaults().)
This notifies the library that you will be supplying raw data.
Furthermore, set cinfo->do_fancy_downsampling to FALSE if you want to use
real downsampled data. (It is set TRUE by jpeg_set_defaults().)
* Ensure jpeg_color_space is correct --- an explicit jpeg_set_colorspace()
call is a good idea. Note that since color conversion is bypassed,
in_color_space is ignored, except that jpeg_set_defaults() uses it to
@ -2620,23 +2618,25 @@ The scanlines count passed to and returned from jpeg_write_raw_data is
measured in terms of the component with the largest v_samp_factor.
jpeg_write_raw_data() processes one MCU row per call, which is to say
v_samp_factor*block_size sample rows of each component. The passed num_lines
value must be at least max_v_samp_factor*block_size, and the return value
will be exactly that amount (or possibly some multiple of that amount, in
future library versions). This is true even on the last call at the bottom
of the image; don't forget to pad your data as necessary.
v_samp_factor*min_DCT_v_scaled_size sample rows of each component. The passed
num_lines value must be at least max_v_samp_factor*min_DCT_v_scaled_size, and
the return value will be exactly that amount (or possibly some multiple of
that amount, in future library versions). This is true even on the last call
at the bottom of the image; don't forget to pad your data as necessary.
The required dimensions of the supplied data can be computed for each
component as
cinfo->comp_info[i].width_in_blocks*block_size samples per row
cinfo->comp_info[i].height_in_blocks*block_size rows in image
cinfo->comp_info[i].width_in_blocks *
cinfo->comp_info[i].DCT_h_scaled_size samples per row
cinfo->comp_info[i].height_in_blocks *
cinfo->comp_info[i].DCT_v_scaled_size rows in image
after jpeg_start_compress() has initialized those fields. If the valid data
is smaller than this, it must be padded appropriately. For some sampling
factors and image sizes, additional dummy DCT blocks are inserted to make
the image a multiple of the MCU dimensions. The library creates such dummy
blocks itself; it does not read them from your supplied data. Therefore you
need never pad by more than block_size samples. An example may help here.
Assume 2h2v downsampling of YCbCr data, that is
need never pad by more than DCT_scaled_size samples.
An example may help here. Assume 2h2v downsampling of YCbCr data, that is
cinfo->comp_info[0].h_samp_factor = 2 for Y
cinfo->comp_info[0].v_samp_factor = 2
cinfo->comp_info[1].h_samp_factor = 1 for Cb
@ -2662,27 +2662,26 @@ destination module suspends, jpeg_write_raw_data() will return 0.
In this case the same data rows must be passed again on the next call.
Decompression with raw data output implies bypassing all postprocessing.
You must deal with the color space and sampling factors present in the
incoming file. If your application only handles, say, 2h1v YCbCr data,
you must check for and fail on other color spaces or other sampling factors.
Decompression with raw data output implies bypassing all postprocessing:
you cannot ask for color quantization, for instance. More seriously, you
must deal with the color space and sampling factors present in the incoming
file. If your application only handles, say, 2h1v YCbCr data, you must
check for and fail on other color spaces or other sampling factors.
The library will not convert to a different color space for you.
To obtain raw data output, set cinfo->raw_data_out = TRUE before
jpeg_start_decompress() (it is set FALSE by jpeg_read_header()). Be sure to
verify that the color space and sampling factors are ones you can handle.
Furthermore, set cinfo->do_fancy_upsampling = FALSE if you want to get real
downsampled data (it is set TRUE by jpeg_read_header()).
Then call jpeg_read_raw_data() in place of jpeg_read_scanlines(). The
decompression process is otherwise the same as usual.
jpeg_read_raw_data() returns one MCU row per call, and thus you must pass a
buffer of at least max_v_samp_factor*block_size scanlines (scanline counting
is the same as for raw-data compression). The buffer you pass must be large
enough to hold the actual data plus padding to DCT-block boundaries. As with
compression, any entirely dummy DCT blocks are not processed so you need not
allocate space for them, but the total scanline count includes them. The
above example of computing buffer dimensions for raw-data compression is
buffer of at least max_v_samp_factor*min_DCT_v_scaled_size scanlines (scanline
counting is the same as for raw-data compression). The buffer you pass must
be large enough to hold the actual data plus padding to DCT-block boundaries.
As with compression, any entirely dummy DCT blocks are not processed so you
need not allocate space for them, but the total scanline count includes them.
The above example of computing buffer dimensions for raw-data compression is
equally valid for decompression.
Input suspension is supported with raw-data decompression: if the data source

57
jpeg/usage.txt
View File

@ -47,7 +47,7 @@ or
This syntax works on all systems, so it is useful for scripts.
The currently supported image file formats are: PPM (PBMPLUS color format),
PGM (PBMPLUS grayscale format), BMP, Targa, and RLE (Utah Raster Toolkit
PGM (PBMPLUS grayscale format), BMP, GIF, Targa, and RLE (Utah Raster Toolkit
format). (RLE is supported only if the URT library is available, which it
isn't on most non-Unix systems.) cjpeg recognizes the input image format
automatically, with the exception of some Targa-format files. You have to
@ -73,10 +73,10 @@ The basic command line switches for cjpeg are:
-grayscale Create monochrome JPEG file from color input.
Be sure to use this switch when compressing a grayscale
BMP file, because cjpeg isn't bright enough to notice
whether a BMP file uses only shades of gray. By
saying -grayscale, you'll get a smaller JPEG file that
takes less time to process.
BMP or GIF file, because cjpeg isn't bright enough to
notice whether a BMP or GIF file uses only shades of
gray. By saying -grayscale, you'll get a smaller
JPEG file that takes less time to process.
-rgb Create RGB JPEG file.
Using this switch suppresses the conversion from RGB
@ -317,10 +317,17 @@ The basic command line switches for djpeg are:
is specified, or if the JPEG file is grayscale;
otherwise, 24-bit full-color format is emitted.
-gif Select GIF output format. Since GIF does not support
more than 256 colors, -colors 256 is assumed (unless
you specify a smaller number of colors). If you
specify -fast, the default number of colors is 216.
-gif Select GIF output format (LZW compressed).
Since GIF does not support more than 256 colors,
-colors 256 is assumed (unless you specify a smaller
number of colors). If you specify -fast, the default
number of colors is 216.
-gif0 Select GIF output format (uncompressed).
Since GIF does not support more than 256 colors,
-colors 256 is assumed (unless you specify a smaller
number of colors). If you specify -fast, the default
number of colors is 216.
-os2 Select BMP output format (OS/2 1.x flavor). 8-bit
colormapped format is emitted if -colors or -grayscale
@ -411,10 +418,6 @@ quality settings to make very small JPEG files; the percentage improvement
is often a lot more than it is on larger files. (At present, -optimize
mode is always selected when generating progressive JPEG files.)
GIF input files are no longer supported, to avoid the Unisys LZW patent
(now expired).
(Conversion of GIF files to JPEG is usually a bad idea anyway.)
HINTS FOR DJPEG
@ -440,10 +443,6 @@ it may run out of memory even with -maxmemory 0. In that case you can still
decompress, with some loss of image quality, by specifying -onepass for
one-pass quantization.
To avoid the Unisys LZW patent (now expired), djpeg produces uncompressed GIF
files. These are larger than they should be, but are readable by standard GIF
decoders.
HINTS FOR BOTH PROGRAMS
@ -571,13 +570,33 @@ The image can be losslessly cropped by giving the switch:
-crop WxH+X+Y Crop to a rectangular subarea of width W, height H
starting at point X,Y.
Crop extension: The width or height parameters can be made larger than the
source image. In this case the extra area is filled in with zero (neutral
gray). A larger width parameter has two more options: Attaching an 'f'
character ("flatten") to the width number will fill in the extra area with
the DC of the adjacent block, instead of gray out. Attaching an 'r'
character ("reflect") to the width number will fill in the extra area with
repeated reflections of the source region, instead of gray out.
A complementary lossless-wipe option is provided to discard (gray out) data
inside a given image region while losslessly preserving what is outside:
-wipe WxH+X+Y Wipe (gray out) a rectangular subarea of
width W, height H starting at point X,Y.
Attaching an 'f' character ("flatten") to the width number will fill
the region with the average of adjacent blocks, instead of gray out.
Attaching an 'f' character ("flatten") to the width number will fill the
region with the average of adjacent blocks, instead of gray out. In case
the wipe region and outside area form two horizontally adjacent rectangles,
attaching an 'r' character ("reflect") to the width number will fill the
region with repeated reflections of the outside area, instead of gray out.
Another option is lossless-drop, which replaces data at a given image
position by another image:
-drop +X+Y filename Drop another image
Both source images must have the same subsampling values. It is best if
they also have the same quantization, otherwise quantization adaption occurs.
The trim option can be used with the drop option to requantize the drop file
to the source file.
Other not-strictly-lossless transformation switches are:

2
zlib/Makefile
View File

@ -1,7 +1,7 @@
#
# GNU ZIP library makefile for the Fast Light Toolkit (FLTK).
#
# Copyright 1998-2011 by Bill Spitzak and others.
# Copyright 1998-2021 by Bill Spitzak and others.
#
# This library is free software. Distribution and use rights are outlined in
# the file "COPYING" which should have been included with this file. If this