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COPYING
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353
COPYING
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|||||||
|
GNU GENERAL PUBLIC LICENSE
|
||||||
|
Version 2, June 1991
|
||||||
|
|
||||||
|
Copyright (C) 1989, 1991 Free Software Foundation, Inc.
|
||||||
|
59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||||
|
Everyone is permitted to copy and distribute verbatim copies
|
||||||
|
of this license document, but changing it is not allowed.
|
||||||
|
|
||||||
|
Preamble
|
||||||
|
|
||||||
|
The licenses for most software are designed to take away your
|
||||||
|
freedom to share and change it. By contrast, the GNU General Public
|
||||||
|
License is intended to guarantee your freedom to share and change free
|
||||||
|
software--to make sure the software is free for all its users. This
|
||||||
|
General Public License applies to most of the Free Software
|
||||||
|
Foundation's software and to any other program whose authors commit to
|
||||||
|
using it. (Some other Free Software Foundation software is covered by
|
||||||
|
the GNU Library General Public License instead.) You can apply it to
|
||||||
|
your programs, too.
|
||||||
|
|
||||||
|
When we speak of free software, we are referring to freedom, not
|
||||||
|
price. Our General Public Licenses are designed to make sure that you
|
||||||
|
have the freedom to distribute copies of free software (and charge for
|
||||||
|
this service if you wish), that you receive source code or can get it
|
||||||
|
if you want it, that you can change the software or use pieces of it
|
||||||
|
in new free programs; and that you know you can do these things.
|
||||||
|
|
||||||
|
To protect your rights, we need to make restrictions that forbid
|
||||||
|
anyone to deny you these rights or to ask you to surrender the rights.
|
||||||
|
These restrictions translate to certain responsibilities for you if you
|
||||||
|
distribute copies of the software, or if you modify it.
|
||||||
|
|
||||||
|
For example, if you distribute copies of such a program, whether
|
||||||
|
gratis or for a fee, you must give the recipients all the rights that
|
||||||
|
you have. You must make sure that they, too, receive or can get the
|
||||||
|
source code. And you must show them these terms so they know their
|
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|
rights.
|
||||||
|
|
||||||
|
We protect your rights with two steps: (1) copyright the software, and
|
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|
(2) offer you this license which gives you legal permission to copy,
|
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|
distribute and/or modify the software.
|
||||||
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|
||||||
|
Also, for each author's protection and ours, we want to make certain
|
||||||
|
that everyone understands that there is no warranty for this free
|
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|
software. If the software is modified by someone else and passed on, we
|
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|
want its recipients to know that what they have is not the original, so
|
||||||
|
that any problems introduced by others will not reflect on the original
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|
authors' reputations.
|
||||||
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|
||||||
|
Finally, any free program is threatened constantly by software
|
||||||
|
patents. We wish to avoid the danger that redistributors of a free
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||||||
|
program will individually obtain patent licenses, in effect making the
|
||||||
|
program proprietary. To prevent this, we have made it clear that any
|
||||||
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patent must be licensed for everyone's free use or not licensed at all.
|
||||||
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|
||||||
|
The precise terms and conditions for copying, distribution and
|
||||||
|
modification follow.
|
||||||
|
|
||||||
|
GNU GENERAL PUBLIC LICENSE
|
||||||
|
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
|
||||||
|
|
||||||
|
0. This License applies to any program or other work which contains
|
||||||
|
a notice placed by the copyright holder saying it may be distributed
|
||||||
|
under the terms of this General Public License. The "Program", below,
|
||||||
|
refers to any such program or work, and a "work based on the Program"
|
||||||
|
means either the Program or any derivative work under copyright law:
|
||||||
|
that is to say, a work containing the Program or a portion of it,
|
||||||
|
either verbatim or with modifications and/or translated into another
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||||||
|
language. (Hereinafter, translation is included without limitation in
|
||||||
|
the term "modification".) Each licensee is addressed as "you".
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||||||
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|
||||||
|
Activities other than copying, distribution and modification are not
|
||||||
|
covered by this License; they are outside its scope. The act of
|
||||||
|
running the Program is not restricted, and the output from the Program
|
||||||
|
is covered only if its contents constitute a work based on the
|
||||||
|
Program (independent of having been made by running the Program).
|
||||||
|
Whether that is true depends on what the Program does.
|
||||||
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|
||||||
|
1. You may copy and distribute verbatim copies of the Program's
|
||||||
|
source code as you receive it, in any medium, provided that you
|
||||||
|
conspicuously and appropriately publish on each copy an appropriate
|
||||||
|
copyright notice and disclaimer of warranty; keep intact all the
|
||||||
|
notices that refer to this License and to the absence of any warranty;
|
||||||
|
and give any other recipients of the Program a copy of this License
|
||||||
|
along with the Program.
|
||||||
|
|
||||||
|
You may charge a fee for the physical act of transferring a copy, and
|
||||||
|
you may at your option offer warranty protection in exchange for a fee.
|
||||||
|
|
||||||
|
2. You may modify your copy or copies of the Program or any portion
|
||||||
|
of it, thus forming a work based on the Program, and copy and
|
||||||
|
distribute such modifications or work under the terms of Section 1
|
||||||
|
above, provided that you also meet all of these conditions:
|
||||||
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|
||||||
|
a) You must cause the modified files to carry prominent notices
|
||||||
|
stating that you changed the files and the date of any change.
|
||||||
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|
||||||
|
b) You must cause any work that you distribute or publish, that in
|
||||||
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whole or in part contains or is derived from the Program or any
|
||||||
|
part thereof, to be licensed as a whole at no charge to all third
|
||||||
|
parties under the terms of this License.
|
||||||
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|
||||||
|
c) If the modified program normally reads commands interactively
|
||||||
|
when run, you must cause it, when started running for such
|
||||||
|
interactive use in the most ordinary way, to print or display an
|
||||||
|
announcement including an appropriate copyright notice and a
|
||||||
|
notice that there is no warranty (or else, saying that you provide
|
||||||
|
a warranty) and that users may redistribute the program under
|
||||||
|
these conditions, and telling the user how to view a copy of this
|
||||||
|
License. (Exception: if the Program itself is interactive but
|
||||||
|
does not normally print such an announcement, your work based on
|
||||||
|
the Program is not required to print an announcement.)
|
||||||
|
|
||||||
|
These requirements apply to the modified work as a whole. If
|
||||||
|
identifiable sections of that work are not derived from the Program,
|
||||||
|
and can be reasonably considered independent and separate works in
|
||||||
|
themselves, then this License, and its terms, do not apply to those
|
||||||
|
sections when you distribute them as separate works. But when you
|
||||||
|
distribute the same sections as part of a whole which is a work based
|
||||||
|
on the Program, the distribution of the whole must be on the terms of
|
||||||
|
this License, whose permissions for other licensees extend to the
|
||||||
|
entire whole, and thus to each and every part regardless of who wrote it.
|
||||||
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|
||||||
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Thus, it is not the intent of this section to claim rights or contest
|
||||||
|
your rights to work written entirely by you; rather, the intent is to
|
||||||
|
exercise the right to control the distribution of derivative or
|
||||||
|
collective works based on the Program.
|
||||||
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|
||||||
|
In addition, mere aggregation of another work not based on the Program
|
||||||
|
with the Program (or with a work based on the Program) on a volume of
|
||||||
|
a storage or distribution medium does not bring the other work under
|
||||||
|
the scope of this License.
|
||||||
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|
||||||
|
3. You may copy and distribute the Program (or a work based on it,
|
||||||
|
under Section 2) in object code or executable form under the terms of
|
||||||
|
Sections 1 and 2 above provided that you also do one of the following:
|
||||||
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|
||||||
|
a) Accompany it with the complete corresponding machine-readable
|
||||||
|
source code, which must be distributed under the terms of Sections
|
||||||
|
1 and 2 above on a medium customarily used for software interchange; or,
|
||||||
|
|
||||||
|
b) Accompany it with a written offer, valid for at least three
|
||||||
|
years, to give any third party, for a charge no more than your
|
||||||
|
cost of physically performing source distribution, a complete
|
||||||
|
machine-readable copy of the corresponding source code, to be
|
||||||
|
distributed under the terms of Sections 1 and 2 above on a medium
|
||||||
|
customarily used for software interchange; or,
|
||||||
|
|
||||||
|
c) Accompany it with the information you received as to the offer
|
||||||
|
to distribute corresponding source code. (This alternative is
|
||||||
|
allowed only for noncommercial distribution and only if you
|
||||||
|
received the program in object code or executable form with such
|
||||||
|
an offer, in accord with Subsection b above.)
|
||||||
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|
||||||
|
The source code for a work means the preferred form of the work for
|
||||||
|
making modifications to it. For an executable work, complete source
|
||||||
|
code means all the source code for all modules it contains, plus any
|
||||||
|
associated interface definition files, plus the scripts used to
|
||||||
|
control compilation and installation of the executable. However, as a
|
||||||
|
special exception, the source code distributed need not include
|
||||||
|
anything that is normally distributed (in either source or binary
|
||||||
|
form) with the major components (compiler, kernel, and so on) of the
|
||||||
|
operating system on which the executable runs, unless that component
|
||||||
|
itself accompanies the executable.
|
||||||
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|
||||||
|
If distribution of executable or object code is made by offering
|
||||||
|
access to copy from a designated place, then offering equivalent
|
||||||
|
access to copy the source code from the same place counts as
|
||||||
|
distribution of the source code, even though third parties are not
|
||||||
|
compelled to copy the source along with the object code.
|
||||||
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|
||||||
|
4. You may not copy, modify, sublicense, or distribute the Program
|
||||||
|
except as expressly provided under this License. Any attempt
|
||||||
|
otherwise to copy, modify, sublicense or distribute the Program is
|
||||||
|
void, and will automatically terminate your rights under this License.
|
||||||
|
However, parties who have received copies, or rights, from you under
|
||||||
|
this License will not have their licenses terminated so long as such
|
||||||
|
parties remain in full compliance.
|
||||||
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|
||||||
|
5. You are not required to accept this License, since you have not
|
||||||
|
signed it. However, nothing else grants you permission to modify or
|
||||||
|
distribute the Program or its derivative works. These actions are
|
||||||
|
prohibited by law if you do not accept this License. Therefore, by
|
||||||
|
modifying or distributing the Program (or any work based on the
|
||||||
|
Program), you indicate your acceptance of this License to do so, and
|
||||||
|
all its terms and conditions for copying, distributing or modifying
|
||||||
|
the Program or works based on it.
|
||||||
|
|
||||||
|
6. Each time you redistribute the Program (or any work based on the
|
||||||
|
Program), the recipient automatically receives a license from the
|
||||||
|
original licensor to copy, distribute or modify the Program subject to
|
||||||
|
these terms and conditions. You may not impose any further
|
||||||
|
restrictions on the recipients' exercise of the rights granted herein.
|
||||||
|
You are not responsible for enforcing compliance by third parties to
|
||||||
|
this License.
|
||||||
|
|
||||||
|
7. If, as a consequence of a court judgment or allegation of patent
|
||||||
|
infringement or for any other reason (not limited to patent issues),
|
||||||
|
conditions are imposed on you (whether by court order, agreement or
|
||||||
|
otherwise) that contradict the conditions of this License, they do not
|
||||||
|
excuse you from the conditions of this License. If you cannot
|
||||||
|
distribute so as to satisfy simultaneously your obligations under this
|
||||||
|
License and any other pertinent obligations, then as a consequence you
|
||||||
|
may not distribute the Program at all. For example, if a patent
|
||||||
|
license would not permit royalty-free redistribution of the Program by
|
||||||
|
all those who receive copies directly or indirectly through you, then
|
||||||
|
the only way you could satisfy both it and this License would be to
|
||||||
|
refrain entirely from distribution of the Program.
|
||||||
|
|
||||||
|
If any portion of this section is held invalid or unenforceable under
|
||||||
|
any particular circumstance, the balance of the section is intended to
|
||||||
|
apply and the section as a whole is intended to apply in other
|
||||||
|
circumstances.
|
||||||
|
|
||||||
|
It is not the purpose of this section to induce you to infringe any
|
||||||
|
patents or other property right claims or to contest validity of any
|
||||||
|
such claims; this section has the sole purpose of protecting the
|
||||||
|
integrity of the free software distribution system, which is
|
||||||
|
implemented by public license practices. Many people have made
|
||||||
|
generous contributions to the wide range of software distributed
|
||||||
|
through that system in reliance on consistent application of that
|
||||||
|
system; it is up to the author/donor to decide if he or she is willing
|
||||||
|
to distribute software through any other system and a licensee cannot
|
||||||
|
impose that choice.
|
||||||
|
|
||||||
|
This section is intended to make thoroughly clear what is believed to
|
||||||
|
be a consequence of the rest of this License.
|
||||||
|
|
||||||
|
8. If the distribution and/or use of the Program is restricted in
|
||||||
|
certain countries either by patents or by copyrighted interfaces, the
|
||||||
|
original copyright holder who places the Program under this License
|
||||||
|
may add an explicit geographical distribution limitation excluding
|
||||||
|
those countries, so that distribution is permitted only in or among
|
||||||
|
countries not thus excluded. In such case, this License incorporates
|
||||||
|
the limitation as if written in the body of this License.
|
||||||
|
|
||||||
|
9. The Free Software Foundation may publish revised and/or new versions
|
||||||
|
of the General Public License from time to time. Such new versions will
|
||||||
|
be similar in spirit to the present version, but may differ in detail to
|
||||||
|
address new problems or concerns.
|
||||||
|
|
||||||
|
Each version is given a distinguishing version number. If the Program
|
||||||
|
specifies a version number of this License which applies to it and "any
|
||||||
|
later version", you have the option of following the terms and conditions
|
||||||
|
either of that version or of any later version published by the Free
|
||||||
|
Software Foundation. If the Program does not specify a version number of
|
||||||
|
this License, you may choose any version ever published by the Free Software
|
||||||
|
Foundation.
|
||||||
|
|
||||||
|
10. If you wish to incorporate parts of the Program into other free
|
||||||
|
programs whose distribution conditions are different, write to the author
|
||||||
|
to ask for permission. For software which is copyrighted by the Free
|
||||||
|
Software Foundation, write to the Free Software Foundation; we sometimes
|
||||||
|
make exceptions for this. Our decision will be guided by the two goals
|
||||||
|
of preserving the free status of all derivatives of our free software and
|
||||||
|
of promoting the sharing and reuse of software generally.
|
||||||
|
|
||||||
|
NO WARRANTY
|
||||||
|
|
||||||
|
11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
|
||||||
|
FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
|
||||||
|
OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
|
||||||
|
PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
|
||||||
|
OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
||||||
|
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
|
||||||
|
TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
|
||||||
|
PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
|
||||||
|
REPAIR OR CORRECTION.
|
||||||
|
|
||||||
|
12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
|
||||||
|
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
|
||||||
|
REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
|
||||||
|
INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
|
||||||
|
OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
|
||||||
|
TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
|
||||||
|
YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
|
||||||
|
PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
|
||||||
|
POSSIBILITY OF SUCH DAMAGES.
|
||||||
|
|
||||||
|
END OF TERMS AND CONDITIONS
|
||||||
|
|
||||||
|
How to Apply These Terms to Your New Programs
|
||||||
|
|
||||||
|
If you develop a new program, and you want it to be of the greatest
|
||||||
|
possible use to the public, the best way to achieve this is to make it
|
||||||
|
free software which everyone can redistribute and change under these terms.
|
||||||
|
|
||||||
|
To do so, attach the following notices to the program. It is safest
|
||||||
|
to attach them to the start of each source file to most effectively
|
||||||
|
convey the exclusion of warranty; and each file should have at least
|
||||||
|
the "copyright" line and a pointer to where the full notice is found.
|
||||||
|
|
||||||
|
<one line to give the program's name and a brief idea of what it does.>
|
||||||
|
Copyright (C) <year> <name of author>
|
||||||
|
|
||||||
|
on, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USAThis program is free software; you can redistribute it and/or modify
|
||||||
|
it under the terms of the GNU General Public License as published by
|
||||||
|
the Free Software Foundation; either version 2 of the License, or
|
||||||
|
(at your option) any later version.
|
||||||
|
|
||||||
|
This program is distributed in the hope that it will be useful,
|
||||||
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||||
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||||
|
GNU General Public License for more details.
|
||||||
|
|
||||||
|
You should have received a copy of the GNU General Public License
|
||||||
|
along with this program; if not, write to the Free Software
|
||||||
|
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||||
|
|
||||||
|
|
||||||
|
Also add information on how to contact you by electronic and paper mail.
|
||||||
|
|
||||||
|
If the program is interactive, make it output a short notice like this
|
||||||
|
when it starts in an interactive mode:
|
||||||
|
|
||||||
|
Gnomovision version 69, Copyright (C) year name of author
|
||||||
|
Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
|
||||||
|
This is free software, and you are welcome to redistribute it
|
||||||
|
under certain conditions; type `show c' for details.
|
||||||
|
|
||||||
|
The hypothetical commands `show w' and `show c' should show the appropriate
|
||||||
|
parts of the General Public License. Of course, the commands you use may
|
||||||
|
be called something other than `show w' and `show c'; they could even be
|
||||||
|
mouse-clicks or menu items--whatever suits your program.
|
||||||
|
|
||||||
|
You should also get your employer (if you work as a programmer) or your
|
||||||
|
school, if any, to sign a "copyright disclaimer" for the program, if
|
||||||
|
necessary. Here is a sample; alter the names:
|
||||||
|
|
||||||
|
Yoyodyne, Inc., hereby disclaims all copyright interest in the program
|
||||||
|
`Gnomovision' (which makes passes at compilers) written by James Hacker.
|
||||||
|
|
||||||
|
<signature of Ty Coon>, 1 April 1989
|
||||||
|
Ty Coon, President of Vice
|
||||||
|
|
||||||
|
This General Public License does not permit incorporating your program into
|
||||||
|
proprietary programs. If your program is a subroutine library, you may
|
||||||
|
consider it more useful to permit linking proprietary applications with the
|
||||||
|
library. If this is what you want to do, use the GNU Library General
|
||||||
|
Public License instead of this License.
|
||||||
|
|
||||||
|
In addition, as a special exception, the copyright holders give
|
||||||
|
permission to link the code of portions of this program with the
|
||||||
|
OpenSSL library under certain conditions as described in each
|
||||||
|
individual source file, and distribute linked combinations
|
||||||
|
including the two.
|
||||||
|
You must obey the GNU General Public License in all respects
|
||||||
|
for all of the code used other than OpenSSL. If you modify
|
||||||
|
file(s) with this exception, you may extend this exception to your
|
||||||
|
version of the file(s), but you are not obligated to do so. If you
|
||||||
|
do not wish to do so, delete this exception statement from your
|
||||||
|
version. If you delete this exception statement from all source
|
||||||
|
files in the program, then also delete it here.
|
||||||
48
Makefile
Normal file
48
Makefile
Normal file
@ -0,0 +1,48 @@
|
|||||||
|
LDFLAGS=-lm
|
||||||
|
CFLAGS=-O3 -Wall -Wuninitialized -fomit-frame-pointer -funroll-loops \
|
||||||
|
-fstrength-reduce -DNODEBUG `libpng-config --I_opts`
|
||||||
|
|
||||||
|
all: optar unoptar
|
||||||
|
|
||||||
|
install:
|
||||||
|
install optar /usr/local/bin/
|
||||||
|
install unoptar /usr/local/bin
|
||||||
|
install pgm2ps /usr/local/bin
|
||||||
|
|
||||||
|
uninstall:
|
||||||
|
rm /usr/local/bin/optar
|
||||||
|
rm /usr/local/bin/unoptar
|
||||||
|
rm /usr/local/bin/pgm2ps
|
||||||
|
|
||||||
|
clean:
|
||||||
|
rm -f optar unoptar golay golay_codes.c *.o
|
||||||
|
|
||||||
|
common.o: common.c optar.h
|
||||||
|
gcc -c $(CPPFLAGS) $(CFLAGS) -o $@ $<
|
||||||
|
|
||||||
|
parity.o: parity.c
|
||||||
|
gcc -c $(CPPFLAGS) $(CFLAGS) -o $@ $<
|
||||||
|
|
||||||
|
optar.o: optar.c optar.h font.h parity.h
|
||||||
|
gcc -c $(CPPFLAGS) $(CFLAGS) -o $@ $<
|
||||||
|
|
||||||
|
golay_codes.o: golay_codes.c
|
||||||
|
gcc -c $(CPPFLAGS) $(CFLAGS) -o $@ $<
|
||||||
|
|
||||||
|
golay.o: golay.c parity.h
|
||||||
|
gcc -c $(CPPFLAGS) $(CFLAGS) -o $@ $<
|
||||||
|
|
||||||
|
unoptar.o: unoptar.c optar.h parity.h
|
||||||
|
gcc -c -I/usr/local/include/libpng $(CPPFLAGS) $(CFLAGS) -o $@ $<
|
||||||
|
|
||||||
|
optar: optar.o common.o golay_codes.o parity.o
|
||||||
|
gcc $(LDFLAGS) -o $@ $^
|
||||||
|
|
||||||
|
golay_codes.c: golay
|
||||||
|
./$< > $@
|
||||||
|
|
||||||
|
golay: golay.o parity.o
|
||||||
|
gcc $(LDFLAGS) -o $@ $^
|
||||||
|
|
||||||
|
unoptar: unoptar.o common.o golay_codes.o parity.o
|
||||||
|
gcc $(LDFLAGS) -o $@ -L/usr/local/lib -lpng -lz $^
|
||||||
113
README
Normal file
113
README
Normal file
@ -0,0 +1,113 @@
|
|||||||
|
Twibright Optar
|
||||||
|
---------------
|
||||||
|
|
||||||
|
This is a program to store data on paper using a 600dpi b/w laser printer and a
|
||||||
|
600+ dpi scanner.
|
||||||
|
|
||||||
|
You need to install ImageMagick so that the resulting .pgm image can be converted into
|
||||||
|
PostScript with the right dimensions (so each pixel is 3x3 600dpi pixels so that
|
||||||
|
there is no unnecessary jitter).
|
||||||
|
|
||||||
|
Make sure you have libpng installed and if you type "libpng-config" on the
|
||||||
|
commandline, there's a program which prints something.
|
||||||
|
|
||||||
|
Compile with "make". Become root (su -) and type "make install". Now you have
|
||||||
|
optar, unoptar and pgm2ps installed on your system in /usr/local/bin. Later
|
||||||
|
you can uninstall by typing "make uninstall" the same way as you typed
|
||||||
|
"make install".
|
||||||
|
|
||||||
|
Encoding (writing)
|
||||||
|
------------------
|
||||||
|
Run
|
||||||
|
|
||||||
|
./optar other_guys.ogg other_guys.ogg
|
||||||
|
|
||||||
|
which will produce files:
|
||||||
|
|
||||||
|
other_guys.ogg_0001.pgm
|
||||||
|
other_guys.ogg_0002.pgm
|
||||||
|
other_guys.ogg_0003.pgm
|
||||||
|
other_guys.ogg_0004.pgm
|
||||||
|
other_guys.ogg_0005.pgm
|
||||||
|
other_guys.ogg_0006.pgm
|
||||||
|
|
||||||
|
Now convert them into PostScript using the included pgm2ps tool:
|
||||||
|
./pgm2ps *.pgm
|
||||||
|
|
||||||
|
Print them using a 600dpi (or more) laser printer. Inkjet or dot matrix was
|
||||||
|
never tested and will not probably work at the pre-defined data density. See
|
||||||
|
"Changing the format" below.
|
||||||
|
|
||||||
|
Please note that the file will be padded by zeroes and the original length will
|
||||||
|
be lost. Pack your data with tar if you store data that are sensitive to this.
|
||||||
|
|
||||||
|
Decoding (reading)
|
||||||
|
------------------
|
||||||
|
|
||||||
|
Clean and polish the scanner glass with rubbing alcohol and paper towel. Put
|
||||||
|
yellow pages on the scanner lid to get sharper picture *). Insert the
|
||||||
|
page so that the text on the bottom is upright. Scan the pages into
|
||||||
|
PNG (not JPEG!) on 600dpi (or 1200dpi, slightly better):
|
||||||
|
|
||||||
|
scan_0001.png
|
||||||
|
scan_0002.png
|
||||||
|
scan_0003.png
|
||||||
|
scan_0004.png
|
||||||
|
scan_0005.png
|
||||||
|
scan_0006.png
|
||||||
|
|
||||||
|
Read the number sequence (format specification) from any of the papers and feed
|
||||||
|
it as 1st argument to the optar, 2nd argument is the filename part before the
|
||||||
|
underscore:
|
||||||
|
|
||||||
|
unoptar 0-65-93-24-3-1-2-24 scan > out.ogg
|
||||||
|
|
||||||
|
Then play out.ogg with mplayer. You should get first about 41 seconds from the
|
||||||
|
Ogg Vorbis file.
|
||||||
|
|
||||||
|
*) In the scanner I tried (Canoscan), the lid didn't seem to be heavy enough to
|
||||||
|
press the paper down completely - there were blurry spots in the picture.
|
||||||
|
Without yellow pages I got 526 reparable bad bits bad from 3.2 million. With
|
||||||
|
yellow pages the blurry spots were much sharper and I got only 261 reparably
|
||||||
|
bad bits!
|
||||||
|
|
||||||
|
Please note the data are padded with zeroes so the original information
|
||||||
|
about file length is lost. If your data format doesn't like this then first
|
||||||
|
pack your data with tar.
|
||||||
|
|
||||||
|
A4 <-> US Letter
|
||||||
|
----------------
|
||||||
|
Change the convert parameters in pgm2ps (see comments). Change XCROSSES
|
||||||
|
and YCROSSES in optar.h (see comments). Recompile. Then you can use US Letter
|
||||||
|
instead of A4.
|
||||||
|
|
||||||
|
Changing the format
|
||||||
|
-------------------
|
||||||
|
If your printer is low quality and you are getting irreparable bits, you can
|
||||||
|
try to format the media to lower capacity. Unfortunately, setting by
|
||||||
|
commandline is not implemented yet. Change XCROSSES and YCROSSES in optar.h to
|
||||||
|
lower values which yields bigger pixels and lower capacity per page, but higher
|
||||||
|
reliability. Make sure they are in roughly the same proportion as before,
|
||||||
|
otherwise you get nonsquare pixels and unnecessary waste of channel capacity.
|
||||||
|
|
||||||
|
You can also change the decoding parameters in unoptar.c (look for MAGIC
|
||||||
|
CONSTANTS) in attempt to read a difficult recording: unsharp_mask,
|
||||||
|
unsharp_dist, sync_white_cut, white_cut, minmax_filter, pixel_blur, cross_trim.
|
||||||
|
|
||||||
|
Future improvement
|
||||||
|
==================
|
||||||
|
- manpage could be written for optar and unoptar
|
||||||
|
- commandline help (-h) could be written for optar and unoptar
|
||||||
|
- the format could be made configurable. Now it's stored in the optar.h
|
||||||
|
- the magic constants could be changed by commandline options. Now they are
|
||||||
|
stored in unoptar.c.
|
||||||
|
- Golay code decoding could be rewritten faster, using a sophisticated
|
||||||
|
algorithm (Kasami algorithm?)
|
||||||
|
- Easy support for multiple pages per page, so it can be read by a digital
|
||||||
|
camera. Currently it cannot since digital camera blurs at the sides of
|
||||||
|
the picture.
|
||||||
|
|
||||||
|
(c) GPL 2007 Karel 'Clock' Kulhavy of Twibright Labs
|
||||||
|
See COPYING for the text of the GPL license.
|
||||||
|
e-mail: clock (at) twibright (dot) com
|
||||||
|
Twibright Optar homepage: http://ronja.twibright.com/optar/
|
||||||
69
common.c
Normal file
69
common.c
Normal file
@ -0,0 +1,69 @@
|
|||||||
|
/* (c) GPL 2007 Karel 'Clock' Kulhavy, Twibright Labs */
|
||||||
|
|
||||||
|
#include <stdio.h> /* fprintf */
|
||||||
|
|
||||||
|
#include "optar.h"
|
||||||
|
|
||||||
|
/* Coordinates don't count with the border - 0,0 is upper left corner of the
|
||||||
|
* first cross! */
|
||||||
|
int is_cross(unsigned x, unsigned y)
|
||||||
|
{
|
||||||
|
x%=CPITCH;
|
||||||
|
y%=CPITCH;
|
||||||
|
return (x<2*CHALF&&y<2*CHALF);
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Returns the coords relative to the upperloeftmost cross upper left corner
|
||||||
|
* pixel! If you have borders, you have to add them! */
|
||||||
|
void seq2xy(int *x, int *y, unsigned seq)
|
||||||
|
{
|
||||||
|
unsigned rep; /* Repetition - number of narrow strip - wide strip pair,
|
||||||
|
starting with 0 */
|
||||||
|
|
||||||
|
if (seq>=TOTALBITS){
|
||||||
|
/* Out of range */
|
||||||
|
*x=-1;
|
||||||
|
*y=-1;
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
/* We are sure we are in range. Document structure:
|
||||||
|
* - narrow strip (between top row of crosses), height is
|
||||||
|
* 2*CHALF
|
||||||
|
* - wide strip, height is CPITCH-2*CHALF
|
||||||
|
* - the above repeats (YCROSSES-1)-times
|
||||||
|
* - narrow strip
|
||||||
|
*/
|
||||||
|
rep=seq/REPPIXELS;
|
||||||
|
seq=seq%REPPIXELS;
|
||||||
|
|
||||||
|
*y=REPHEIGHT*rep;
|
||||||
|
/* Now seq is sequence in the repetition pair */
|
||||||
|
if (seq>=NARROWPIXELS){
|
||||||
|
/* Second, wide strip of the pair */
|
||||||
|
*y+=NARROWHEIGHT;
|
||||||
|
seq-=NARROWPIXELS;
|
||||||
|
/* Now seq is sequence in the wide strip */
|
||||||
|
*y+=seq/WIDEWIDTH;
|
||||||
|
*x=seq%WIDEWIDTH;
|
||||||
|
}else{
|
||||||
|
/* First, narrow strip of the pair */
|
||||||
|
unsigned gap; /* Horizontal gap number */
|
||||||
|
*x=2*CHALF;
|
||||||
|
*y+=seq/NARROWWIDTH;
|
||||||
|
seq%=NARROWWIDTH;
|
||||||
|
/* seq is now sequence in the horiz. line */
|
||||||
|
gap=seq/GAPWIDTH;
|
||||||
|
*x+=gap*CPITCH;
|
||||||
|
seq%=GAPWIDTH;
|
||||||
|
/* seq is now sequence in the gap */
|
||||||
|
*x+=seq;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Golay codes */
|
||||||
|
unsigned long golay(unsigned long in)
|
||||||
|
{
|
||||||
|
return golay_codes[in&4095];
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
64
golay.c
Normal file
64
golay.c
Normal file
@ -0,0 +1,64 @@
|
|||||||
|
/* (c) GPL 2007 Karel 'Clock' Kulhavy, Twibright Labs */
|
||||||
|
|
||||||
|
#include <stdio.h>
|
||||||
|
#include <assert.h>
|
||||||
|
|
||||||
|
#include "parity.h"
|
||||||
|
|
||||||
|
int dodecahedron[12][5]={
|
||||||
|
/* For each dodecahedron face (number in the comment, 1-12) there
|
||||||
|
* is a list of the 5 adjacent faces (1-12). See golay.svg for
|
||||||
|
* a drawing. */
|
||||||
|
{/* 1 */ 2, 3, 4, 5, 6},
|
||||||
|
{/* 2 */ 1, 3, 6, 7, 8},
|
||||||
|
{/* 3 */ 1, 2, 4, 8, 9},
|
||||||
|
{/* 4 */ 1, 3, 5, 9, 10},
|
||||||
|
{/* 5 */ 1, 4, 6, 10, 11},
|
||||||
|
{/* 6 */ 1, 2, 5, 7, 11},
|
||||||
|
{/* 7 */ 2, 6, 8, 11, 12},
|
||||||
|
{/* 8 */ 2, 3, 7, 9, 12},
|
||||||
|
{/* 9 */ 3, 4, 8, 10, 12},
|
||||||
|
{/* 10 */ 4, 5, 9, 11, 12},
|
||||||
|
{/* 11 */ 5, 6, 7, 10, 12},
|
||||||
|
{/* 12 */ 7, 8, 9, 10, 11}
|
||||||
|
};
|
||||||
|
|
||||||
|
unsigned parities[12];
|
||||||
|
|
||||||
|
int main(int argc, char ** argv)
|
||||||
|
{
|
||||||
|
unsigned mask, p, f;
|
||||||
|
unsigned input;
|
||||||
|
unsigned prty; /* parity */
|
||||||
|
|
||||||
|
for (p=0;p<12;p++){
|
||||||
|
mask=0xfff; /* All dodecahedron faces */
|
||||||
|
for (f=0;f<5;f++)
|
||||||
|
mask^=1U<<(dodecahedron[p][f]-1);
|
||||||
|
parities[p]=mask;
|
||||||
|
}
|
||||||
|
|
||||||
|
printf("unsigned long golay_codes[4096]={\n");
|
||||||
|
|
||||||
|
for (input=0;input<4096;input++){
|
||||||
|
unsigned n_ones;
|
||||||
|
unsigned long codeword;
|
||||||
|
|
||||||
|
prty=0;
|
||||||
|
for (p=0;p<12;p++){
|
||||||
|
prty<<=1;
|
||||||
|
prty|=parity(input&parities[p]);
|
||||||
|
}
|
||||||
|
codeword=((unsigned long)input<<12)|prty;
|
||||||
|
n_ones=ones(codeword);
|
||||||
|
printf((input==4095?"0x%06lx\n":"0x%06lx,\n"),codeword);
|
||||||
|
assert(n_ones==0
|
||||||
|
||n_ones==8
|
||||||
|
||n_ones==12
|
||||||
|
||n_ones==16
|
||||||
|
||n_ones==24);
|
||||||
|
}
|
||||||
|
|
||||||
|
printf("};\n");
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
1298
golay.svg
Normal file
1298
golay.svg
Normal file
File diff suppressed because it is too large
Load Diff
|
After Width: | Height: | Size: 54 KiB |
323
optar.c
Normal file
323
optar.c
Normal file
@ -0,0 +1,323 @@
|
|||||||
|
/* (c) GPL 2007 Karel 'Clock' Kulhavy, Twibright Labs */
|
||||||
|
|
||||||
|
#include <stdio.h> /* getchar */
|
||||||
|
#include <stdlib.h> /* exit */
|
||||||
|
#include <string.h> /* memcpy */
|
||||||
|
#include <assert.h> /* assert */
|
||||||
|
|
||||||
|
#define width font_width
|
||||||
|
#define height font_height
|
||||||
|
#include "font.h"
|
||||||
|
#undef width
|
||||||
|
#undef height
|
||||||
|
|
||||||
|
#include "optar.h"
|
||||||
|
#include "parity.h"
|
||||||
|
#define HEIGHT (2*BORDER+DATA_HEIGHT+TEXT_HEIGHT)
|
||||||
|
#define TEXT_HEIGHT 24
|
||||||
|
|
||||||
|
static unsigned char ary[WIDTH*HEIGHT];
|
||||||
|
static unsigned char *file_label=(unsigned char *)""; /* The filename written in the
|
||||||
|
file_label */
|
||||||
|
static char *output_filename; /* The output filename */
|
||||||
|
static unsigned output_filename_buffer_size;
|
||||||
|
static unsigned char *base=(unsigned char *)"optar_out"; /* Output filename base */
|
||||||
|
static unsigned file_number;
|
||||||
|
FILE *output_stream;
|
||||||
|
FILE *input_stream;
|
||||||
|
unsigned n_pages; /* Number of pages calculated from the file length */
|
||||||
|
|
||||||
|
void dump_ary(void)
|
||||||
|
{
|
||||||
|
fprintf(output_stream,
|
||||||
|
"P5\n"
|
||||||
|
"%u %u\n"
|
||||||
|
"255\n"
|
||||||
|
,WIDTH, HEIGHT);
|
||||||
|
|
||||||
|
fwrite(ary, sizeof(ary), 1, output_stream);
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Only the LSB is significant. Writes hamming-encoded bits. The sequence number
|
||||||
|
* must not be out of range! */
|
||||||
|
void write_channelbit(unsigned char bit, unsigned long seq)
|
||||||
|
{
|
||||||
|
int x,y; /* Positions of the pixel */
|
||||||
|
|
||||||
|
bit&=1;
|
||||||
|
bit=-bit;
|
||||||
|
bit=~bit; /* White=bit 0, black=bit 1 */
|
||||||
|
seq2xy(&x, &y, seq); /* Returns without borders! */
|
||||||
|
x+=BORDER;
|
||||||
|
y+=BORDER;
|
||||||
|
ary[x+y*WIDTH]=bit;
|
||||||
|
seq++;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Groups into two groups of bits, 0...bit-1 and bit..., and then makes
|
||||||
|
* a gap with zero between them by shifting the higer bits up. */
|
||||||
|
unsigned long split(unsigned long in, unsigned bit)
|
||||||
|
{
|
||||||
|
unsigned long high;
|
||||||
|
|
||||||
|
high=in;
|
||||||
|
in&=(1UL<<bit)-1;
|
||||||
|
high^=in;
|
||||||
|
return (high<<1)|in;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Thie bits are always stored in the LSB side of the register. Only the
|
||||||
|
* lowest FEC_SMALLBITS are taken into account on input. */
|
||||||
|
unsigned long hamming(unsigned long in)
|
||||||
|
{
|
||||||
|
in&=(1UL<<FEC_SMALLBITS)-1;
|
||||||
|
|
||||||
|
in<<=3; /* Split 0,1,2 */
|
||||||
|
#if FEC_ORDER>=3
|
||||||
|
in=split(in,4);
|
||||||
|
#if FEC_ORDER>=4
|
||||||
|
in=split(in,8);
|
||||||
|
#if FEC_ORDER>=5
|
||||||
|
in=split(in,16);
|
||||||
|
in|=parity(in&0xffff0000)<<16;
|
||||||
|
#endif
|
||||||
|
in|=parity(in&0xff00ff00)<<8;
|
||||||
|
#endif
|
||||||
|
in|=parity(in&0xf0f0f0f0)<<4;
|
||||||
|
#endif
|
||||||
|
in|=parity(in&0xcccccccc)<<2;
|
||||||
|
in|=parity(in&0xaaaaaaaa)<<1;
|
||||||
|
in|=parity(in);
|
||||||
|
return in;
|
||||||
|
}
|
||||||
|
|
||||||
|
void border(void)
|
||||||
|
{
|
||||||
|
unsigned c;
|
||||||
|
char *ptr=(char *)(void *)ary;
|
||||||
|
|
||||||
|
memset(ptr,0,BORDER*WIDTH);
|
||||||
|
ptr+=BORDER*WIDTH;
|
||||||
|
for (c=DATA_HEIGHT;c;c--){
|
||||||
|
memset(ptr,0,BORDER);
|
||||||
|
ptr+=WIDTH;
|
||||||
|
memset(ptr-BORDER,0,BORDER);
|
||||||
|
}
|
||||||
|
memset(ptr,0,TEXT_HEIGHT*WIDTH);
|
||||||
|
ptr+=TEXT_HEIGHT*WIDTH;
|
||||||
|
/* BORDER bytes into the bottom border */
|
||||||
|
memset(ptr,0,BORDER*WIDTH);
|
||||||
|
}
|
||||||
|
|
||||||
|
void cross(x,y)
|
||||||
|
{
|
||||||
|
unsigned char *ptr=ary+y*WIDTH+x;
|
||||||
|
unsigned c;
|
||||||
|
|
||||||
|
for (c=CHALF;c;c--,ptr+=WIDTH){
|
||||||
|
memset(ptr,0,CHALF);
|
||||||
|
memset(ptr+CHALF,0xff,CHALF);
|
||||||
|
memset(ptr+CHALF*WIDTH,0xff,CHALF);
|
||||||
|
memset(ptr+CHALF*(WIDTH+1),0,CHALF);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
void crosses(void)
|
||||||
|
{
|
||||||
|
unsigned x,y;
|
||||||
|
|
||||||
|
for (y=BORDER;y<=HEIGHT-TEXT_HEIGHT-BORDER-2*CHALF;y+=CPITCH)
|
||||||
|
for (x=BORDER;x<=WIDTH-BORDER-2*CHALF;x+=CPITCH)
|
||||||
|
cross(x,y);
|
||||||
|
}
|
||||||
|
|
||||||
|
/* x is in the range 0 to DATA_WIDTH-1 */
|
||||||
|
void text_block (destx, srcx, width)
|
||||||
|
{
|
||||||
|
int x, y;
|
||||||
|
unsigned char *srcptr;
|
||||||
|
unsigned char *destptr;
|
||||||
|
|
||||||
|
if (destx+width>DATA_WIDTH) return; /* Letter doesn't fit */
|
||||||
|
|
||||||
|
srcptr=(unsigned char *)(void *)header_data+srcx;
|
||||||
|
destptr=ary+WIDTH*(BORDER+DATA_HEIGHT)+BORDER+destx;
|
||||||
|
|
||||||
|
for (y=0;y<TEXT_HEIGHT;y++, srcptr+=font_width, destptr+=WIDTH){
|
||||||
|
for (x=0;x<width;x++){
|
||||||
|
destptr[x]=header_data_cmap[srcptr[x]][0]&0x80?0xff:0;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
void label(void)
|
||||||
|
{
|
||||||
|
unsigned x=0;
|
||||||
|
static char txt[DATA_WIDTH/TEXT_WIDTH];
|
||||||
|
unsigned char *ptr;
|
||||||
|
unsigned txtlen;
|
||||||
|
|
||||||
|
snprintf(txt, sizeof txt, " 0-%u-%u-%u-%u-%u-%u-%u %u/%u %s"
|
||||||
|
, XCROSSES, YCROSSES, CPITCH, CHALF
|
||||||
|
, FEC_ORDER, BORDER, TEXT_HEIGHT
|
||||||
|
,file_number,n_pages
|
||||||
|
, (char *)(void *)file_label);
|
||||||
|
txtlen=strlen((char *)(void *)txt);
|
||||||
|
|
||||||
|
assert(font_height==TEXT_HEIGHT);
|
||||||
|
x=font_width-TEXT_WIDTH*(127-' ');
|
||||||
|
text_block(0,TEXT_WIDTH*(127-' '), x);
|
||||||
|
for (ptr=(unsigned char *)(void *)txt
|
||||||
|
;ptr<(unsigned char *)(void *)txt+txtlen;ptr++){
|
||||||
|
if (*ptr>=' '&&*ptr<=127){
|
||||||
|
text_block(x,TEXT_WIDTH*(*ptr-' '), TEXT_WIDTH);
|
||||||
|
x+=TEXT_WIDTH;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
||||||
|
|
||||||
|
void format_ary(void)
|
||||||
|
{
|
||||||
|
memset(ary, 0xff, sizeof(ary)); /* White */
|
||||||
|
border();
|
||||||
|
crosses();
|
||||||
|
label();
|
||||||
|
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Always formats ary. Dumps it if it's not the first one. */
|
||||||
|
void new_file(void)
|
||||||
|
{
|
||||||
|
if (file_number){
|
||||||
|
dump_ary();
|
||||||
|
fclose(output_stream);
|
||||||
|
}
|
||||||
|
if (file_number>=9999){
|
||||||
|
fprintf(stderr,"optar: too many pages - 10,000 or more\n");
|
||||||
|
exit(1);
|
||||||
|
}
|
||||||
|
snprintf(output_filename,output_filename_buffer_size
|
||||||
|
,"%s_%04u.pgm",(char *)(void *)base,++file_number);
|
||||||
|
output_stream=fopen(output_filename,"w");
|
||||||
|
if (!output_stream){
|
||||||
|
fprintf(stderr,"optar: cannot open %s for writing.\n", output_filename);
|
||||||
|
exit(1);
|
||||||
|
}
|
||||||
|
format_ary();
|
||||||
|
}
|
||||||
|
|
||||||
|
/* That's the net channel capacity */
|
||||||
|
void write_payloadbit(unsigned char bit)
|
||||||
|
{
|
||||||
|
static unsigned long accu=1;
|
||||||
|
static unsigned long hamming_symbol;
|
||||||
|
|
||||||
|
accu<<=1;
|
||||||
|
accu|=bit&1;
|
||||||
|
if (accu&(1UL<<FEC_SMALLBITS)){
|
||||||
|
/* Full payload */
|
||||||
|
int shift;
|
||||||
|
|
||||||
|
/* Expands from FEC_SMALLBITS bits to FEC_LARGEBITS */
|
||||||
|
#if FEC_ORDER == 1
|
||||||
|
accu=golay(accu);
|
||||||
|
#else
|
||||||
|
accu=hamming(accu);
|
||||||
|
#endif /* FEC_ORDER */
|
||||||
|
|
||||||
|
if (hamming_symbol>=FEC_SYMS){
|
||||||
|
/* We couldn't write into the page, we need to make
|
||||||
|
* another one */
|
||||||
|
new_file();
|
||||||
|
hamming_symbol=0;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Write the symbol into the page */
|
||||||
|
for (shift=FEC_LARGEBITS-1;shift>=0;shift--)
|
||||||
|
write_channelbit(accu>>shift
|
||||||
|
, hamming_symbol+(FEC_LARGEBITS-1-shift)
|
||||||
|
*FEC_SYMS);
|
||||||
|
accu=1;
|
||||||
|
hamming_symbol++;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
void write_byte(unsigned char c)
|
||||||
|
{
|
||||||
|
int bit;
|
||||||
|
|
||||||
|
for (bit=7; bit>=0;bit--)
|
||||||
|
write_payloadbit(c>>bit);
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Prints the text at the bottom */
|
||||||
|
/* Makes one output file. */
|
||||||
|
void feed_data(void)
|
||||||
|
{
|
||||||
|
int c;
|
||||||
|
|
||||||
|
while((c=fgetc(input_stream))!=EOF){
|
||||||
|
write_byte(c);
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Flush the FEC with zeroes */
|
||||||
|
for (c=FEC_SMALLBITS-1;c;c--){
|
||||||
|
write_payloadbit(0);
|
||||||
|
}
|
||||||
|
|
||||||
|
dump_ary();
|
||||||
|
fclose(output_stream);
|
||||||
|
|
||||||
|
}
|
||||||
|
|
||||||
|
void open_input_file(char *fname)
|
||||||
|
{
|
||||||
|
input_stream=fopen(fname,"r");
|
||||||
|
if (!input_stream){
|
||||||
|
fprintf(stderr,"optar: cannot open input file %s: "
|
||||||
|
,fname);
|
||||||
|
perror("");
|
||||||
|
exit(1);
|
||||||
|
}
|
||||||
|
if (fseek(input_stream, 0, SEEK_END)){
|
||||||
|
fprintf(stderr,"optar: cannot seek to the end of %s: "
|
||||||
|
,fname);
|
||||||
|
perror("");
|
||||||
|
exit(1);
|
||||||
|
}
|
||||||
|
n_pages=(((unsigned long)ftell(input_stream)<<3)+NETBITS-1)
|
||||||
|
/NETBITS;
|
||||||
|
if (fseek(input_stream,0, SEEK_SET)){
|
||||||
|
fprintf(stderr,"optar: cannot seek to the beginning of %s: "
|
||||||
|
,fname);
|
||||||
|
perror("");
|
||||||
|
exit(1);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/* argv format:
|
||||||
|
* 1st arg - input file
|
||||||
|
* 2nd arg(optional) - label and output filename base */
|
||||||
|
int main(int argc, char **argv)
|
||||||
|
{
|
||||||
|
|
||||||
|
if (argc<2){
|
||||||
|
fprintf(stderr,"Usage: optar <input file> [filename base]\n");
|
||||||
|
exit(1);
|
||||||
|
}
|
||||||
|
open_input_file(argv[1]);
|
||||||
|
|
||||||
|
if (argc>=3) file_label=base=(void *)argv[2];
|
||||||
|
output_filename_buffer_size=strlen((char *)(void *)base)+1+4+1+3+1;
|
||||||
|
output_filename=malloc(output_filename_buffer_size);
|
||||||
|
if (!output_filename){
|
||||||
|
fprintf(stderr,"Cannot allocate output filename\n");
|
||||||
|
exit(1);
|
||||||
|
}
|
||||||
|
new_file();
|
||||||
|
feed_data();
|
||||||
|
fclose(input_stream);
|
||||||
|
free(output_filename);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
77
optar.h
Normal file
77
optar.h
Normal file
@ -0,0 +1,77 @@
|
|||||||
|
/* (c) GPL 2007 Karel 'Clock' Kulhavy, Twibright Labs */
|
||||||
|
|
||||||
|
#define MIN(x,y) ((x)<(y)?(x):(y))
|
||||||
|
#define MAX(x,y) ((x)>(y)?(x):(y))
|
||||||
|
|
||||||
|
#define BORDER 2 /* In pixels. Thickness of the border */
|
||||||
|
#define CHALF 3 /* Size of the cross half. Size of the cross is CHALF*2 x CHALF*2.
|
||||||
|
*/
|
||||||
|
#define CPITCH 24 /* Distance between cross centers */
|
||||||
|
|
||||||
|
/* XCROSSES A4 65, US Letter 67. */
|
||||||
|
#define XCROSSES 65 /* Number of crosses horizontally */
|
||||||
|
/* YCROSSES A4 93, US Letter 87. */
|
||||||
|
#define YCROSSES 93 /* Number of crosses vertically */
|
||||||
|
|
||||||
|
#define DATA_WIDTH (CPITCH*(XCROSSES-1)+2*CHALF) /* The rectangle occupied by
|
||||||
|
the data and crosses */
|
||||||
|
#define DATA_HEIGHT (CPITCH*(YCROSSES-1)+2*CHALF)
|
||||||
|
#define WIDTH (2*BORDER+DATA_WIDTH) /* In pixels, including the border */
|
||||||
|
/* In pixels, including the border and the label */
|
||||||
|
|
||||||
|
#define TEXT_WIDTH 13 /* Width of a single letter */
|
||||||
|
|
||||||
|
/* Definitions for seq2xy */
|
||||||
|
|
||||||
|
/* Properties of the narrow horizontal strip, with crosses */
|
||||||
|
#define NARROWHEIGHT (2*CHALF)
|
||||||
|
#define GAPWIDTH (CPITCH-2*CHALF)
|
||||||
|
#define NARROWWIDTH (GAPWIDTH*(XCROSSES-1)) /* Useful width */
|
||||||
|
#define NARROWPIXELS (NARROWHEIGHT*NARROWWIDTH) /* Useful pixels */
|
||||||
|
|
||||||
|
/* Properties of the wide horizontal strip, without crosses */
|
||||||
|
#define WIDEHEIGHT GAPWIDTH
|
||||||
|
#define WIDEWIDTH (WIDTH-2*BORDER)
|
||||||
|
#define WIDEPIXELS (WIDEHEIGHT*WIDEWIDTH)
|
||||||
|
|
||||||
|
/* Amount of raw payload pixels in one narrow-wide strip pair */
|
||||||
|
#define REPHEIGHT (NARROWHEIGHT+WIDEHEIGHT)
|
||||||
|
#define REPPIXELS (WIDEPIXELS+NARROWPIXELS)
|
||||||
|
|
||||||
|
/* Total bits before hamming including the unused */
|
||||||
|
#define TOTALBITS ((long)REPPIXELS*(YCROSSES-1)+NARROWPIXELS)
|
||||||
|
|
||||||
|
/* Hamming codes with parity */
|
||||||
|
#define FEC_ORDER 1 /* Can be 2 to 5 inclusive.
|
||||||
|
5 is 26/32,
|
||||||
|
4 is 11/16,
|
||||||
|
3 is 4/8,
|
||||||
|
2 is 4/1
|
||||||
|
1 is golay codes */
|
||||||
|
#if FEC_ORDER==1
|
||||||
|
/* Golay */
|
||||||
|
#define FEC_LARGEBITS 24
|
||||||
|
#define FEC_SMALLBITS 12
|
||||||
|
#else
|
||||||
|
/* Hamming */
|
||||||
|
#define FEC_LARGEBITS (1<<FEC_ORDER)
|
||||||
|
#define FEC_SMALLBITS (FEC_LARGEBITS-1-FEC_ORDER)
|
||||||
|
#endif
|
||||||
|
|
||||||
|
/* Hamming net channel capacity */
|
||||||
|
#define FEC_SYMS (TOTALBITS/FEC_LARGEBITS)
|
||||||
|
#define NETBITS (FEC_SYMS*FEC_SMALLBITS) /* Net payload bits */
|
||||||
|
#define USEDBITS (FEC_SYMS*FEC_LARGEBITS) /* Used raw bits to store
|
||||||
|
Hamming symbols */
|
||||||
|
|
||||||
|
/* Functions from common.c */
|
||||||
|
extern unsigned long parity(unsigned long in);
|
||||||
|
extern int is_cross(unsigned x, unsigned y);
|
||||||
|
extern void seq2xy(int *x, int *y, unsigned seq);
|
||||||
|
|
||||||
|
/* Counts number of '1' bits */
|
||||||
|
unsigned ones(unsigned long in);
|
||||||
|
|
||||||
|
/* Golay codes */
|
||||||
|
unsigned long golay(unsigned long in);
|
||||||
|
extern unsigned long golay_codes[4096];
|
||||||
26
parity.c
Normal file
26
parity.c
Normal file
@ -0,0 +1,26 @@
|
|||||||
|
/* (c) GPL 2007 Karel 'Clock' Kulhavy, Twibright Labs */
|
||||||
|
|
||||||
|
unsigned long parity(unsigned long in)
|
||||||
|
{
|
||||||
|
in^=in>>16;
|
||||||
|
in^=in>>8;
|
||||||
|
in^=in>>4;
|
||||||
|
in^=in>>2;
|
||||||
|
in^=in>>1;
|
||||||
|
return in&1;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Counts number of '1' bits */
|
||||||
|
unsigned ones(unsigned long in)
|
||||||
|
{
|
||||||
|
in-=((in>>1)&0x55555555UL); /* 2-bit groups result with max. 10 */
|
||||||
|
in=(in&0x33333333UL)+((in&0xccccccccUL)>>2); /* 4-bit groups with
|
||||||
|
max. 100 */
|
||||||
|
in+=in>>4;
|
||||||
|
in&=0x0f0f0f0fUL; /* 8-bit groups with max. 1000 */
|
||||||
|
in+=in>>8;
|
||||||
|
in+=in>>16;
|
||||||
|
return in&0x3f;
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
7
parity.h
Normal file
7
parity.h
Normal file
@ -0,0 +1,7 @@
|
|||||||
|
/* (c) GPL 2007 Karel 'Clock' Kulhavy, Twibright Labs */
|
||||||
|
|
||||||
|
extern unsigned long parity(unsigned long in);
|
||||||
|
|
||||||
|
/* Counts number of '1' bits */
|
||||||
|
extern unsigned ones(unsigned long in);
|
||||||
|
|
||||||
17
pgm2ps
Normal file
17
pgm2ps
Normal file
@ -0,0 +1,17 @@
|
|||||||
|
#!/bin/sh
|
||||||
|
while [ $# -gt 0 ]; do
|
||||||
|
target=`echo "$1" | sed -e 's/\.pgm$/.ps/'`
|
||||||
|
echo Converting "$1" to "$target"
|
||||||
|
# We assume roughly 0.25 inch border (18) on each side.
|
||||||
|
# A4 is 595.27559 x 841.889763 (595 x 842)
|
||||||
|
# Letter is 8.5x11 inches or 612x792.
|
||||||
|
|
||||||
|
# Change to 556.56x807.12+19.22+17.44 for A4 and
|
||||||
|
# 573.84x755.28+19.08+18.36 for US Letter.
|
||||||
|
# Don't forget to change XCROSSES and YCROSSES in optar.h and
|
||||||
|
# recompile.
|
||||||
|
convert -page 556.56x807.12+19.22+17.44 "$1" "$target"
|
||||||
|
# convert -page 573.84x755.28+19.08+18.36 "$1" "$target"
|
||||||
|
shift
|
||||||
|
done
|
||||||
|
|
||||||
Loading…
x
Reference in New Issue
Block a user