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53 commits

Author SHA1 Message Date
YAMAMOTO Takashi
f1dd37fbdb quirc_resize: Make this a bit more careful about integer overflows 
Also, avoid malloc(0), which is not too portable.
 2021-05-11 11:05:58 +09:00
YAMAMOTO Takashi
772cd3e73f Improve stack usage for flood filling 
* Make flood filling logic iterative (vs recursive)
  I basically tried one-to-one conversions here to avoid mistakes.
  probably it has a room for later optimizations.

* Use explicit malloc (vs variables on stack) to allocate the work area.

* Estimate the amount of memory for the work area dynamically
  from the image size, instead of using a constant FLOOD_FILL_MAX_DEPTH,
  which is too big in the most cases.
 2021-05-11 11:05:58 +09:00
Daniel Beer
c6fc67088a
Merge pull request #103 from yamt/otsu 
Fix possible overflows in otsu()
 2021-05-11 13:24:56 +12:00
Daniel Beer
db49540f36
Merge pull request #107 from yamt/shrink-datastream 
Shrink struct datastream by borrowing the user buffer
 2021-05-11 10:30:58 +12:00
YAMAMOTO Takashi
21b7581b04 Shrink struct datastream by borrowing the user buffer 2021-04-23 13:40:37 +09:00
YAMAMOTO Takashi
65379a7c39 finder_scan: Improve capstone detection on small images 
When using small captured images, I somehow frequently see failures
to recognize a capstone due to rounding errors.
eg. when pb[] = {2 3 8 3 2}.

This commit tries to improve it by using fixed-point arithmetics.
The scaling factor was chosen somehow arbitrary. A moderate scaling
should be enough.
 2021-04-23 10:36:22 +09:00
YAMAMOTO Takashi
734258c775 finder_scan: constify the "check" array 2021-04-23 10:36:22 +09:00
YAMAMOTO Takashi
02ed1066ba test_grouping: use unsigned variables where it makes more sense 2021-04-23 10:36:22 +09:00
YAMAMOTO Takashi
ea9b6ee5ef otsu: Use unsigned for the pixel numbers 
Because singed numbers don't make sense here.
 2021-04-08 13:38:30 +09:00
YAMAMOTO Takashi
de68db7b69 otsu: Use double for weighted sums 
My phone camera produces 12M-pixel images.
They can easily overflow an int.
 2021-04-08 13:38:30 +09:00
Claudio Felber
4bc17cf8c6 Optimize quirc_flip() 2020-09-22 12:14:09 +02:00
Claudio Felber
5beb59e3b4 Support horizontally flipped QR-codes according to ISO 18004:2015 2020-09-21 16:54:55 +02:00
Claudio Felber
963d6ed126 Fix stack corruption and bus errors while scanning oversized QR codes 2020-09-15 00:51:41 +02:00
Alexandre Perrin
a0b41121e4 Refactored some c99 features 
Fixes #68
 2020-02-27 20:40:23 +01:00
Alexandre Perrin
026485bdc6 missing <limits.h> header 2019-09-25 11:10:43 +02:00
Alexandre Perrin
bf397f0794
Merge pull request #57 from kAworu/cosmetic 
define a QUIRC_PIXEL_ALIAS_IMAGE constant to explicit conditional path
 2019-09-25 10:59:08 +02:00
Alexandre Perrin
74459b9f59 Don't assume that sizeof(int) == sizeof(int32_t) 
See https://github.com/dlbeer/quirc/pull/59#discussion_r320307589
 2019-09-25 10:57:38 +02:00
Sushrut Shringarputale
26d2402655
Fixes issue #60 2019-09-09 23:09:20 -04:00
Sushrut Shringarputale
ed833132d5 Fix some compile-time issues for better production usability 
Fixed up some type coercion and uninitialized variable instances for
better production code usability.
 2019-08-20 09:50:39 -07:00
Alexandre Perrin
f700e456b4 define a QUIRC_PIXEL_ALIAS_IMAGE constant to explicit conditional path 
Before this patch, the "sizeof dance" was confusing, fix #54.
 2019-07-02 09:22:25 +02:00
Daniel Beer
5d71b1853e identify: make otsu() static. 2019-05-02 15:56:35 +12:00
Claudio Felber
766f79ce7c Use const struct quirc parameter in otsu() function and fix tabs 2019-04-30 18:44:59 +02:00
Claudio Felber
96a5a380fb Remove quirc.row_average and associated code 
quirc.row_average was used by the former threshold function and has
become obsolete with the introduction of the Otsu threshold function.
 2019-04-30 18:43:57 +02:00
Claudio Felber
97ffaabfb5 Replace existing threshold function with Otsu threshold algorithm 2019-04-30 13:02:11 +02:00
Alexandre Perrin
d3780f3e6f Warning comment improvement. 2017-06-11 10:19:31 +02:00
Alexandre Perrin
90371f36a0 threshold() uses now the row_average member of struct quirc. 2017-06-11 10:08:58 +02:00
Alexandre Perrin
21f6863577 Added a row_average member to struct quirc. 
Prep to remove the VLA from threshold()
 2017-06-11 10:08:58 +02:00
Daniel Beer
7b26f6e193 Merge pull request #39 from kAworu/quirc_resize.fix 
Fix a potential use-after-free on quirc_resize failure.
 2017-06-10 14:02:40 +12:00
Alexandre Perrin
971c9d4e8c refactor quirc_resize 
So that the given quirc struct is never invalid once we return to the
caller.
 2017-06-09 22:12:06 +02:00
Alexandre Perrin
1f9edb0b84 Fix a potential use-after-free on quirc_resize failure. 
Before this patch, in the event of `q->image` reallocation success but
`q->pixels` failure, `q->image` would point to a freed memory.

After this patch, once quirc_resize() returns, `q->image` consistently
point to a memory address that can be freed.

There is still an inconsistency left in the example codepath: `q->{h,w}`
would hold the "old" values, while `q->image` allocated size would be
based in the requested width/height; hence the comment update about the
state of the QR-code recognizer (it should only be passed to
quirc_destroy()).
 2017-06-07 19:37:14 +02:00
Alexandre Perrin
a858ec4896 Fixes warnings emitted by gcc -Wold-style-declaration 2017-06-07 10:24:43 +02:00
Alexandre Perrin
2528ea3955 Comment fix 
Bad copy-pasta from
http://www.thonky.com/qr-code-tutorial/kanji-mode-encoding
 2017-05-30 19:23:42 +02:00
Alexandre Perrin
e16c02e226 Fix Kanji decoding. 
Before this patch, Kanji decoding was broken.
 2017-05-30 18:52:31 +02:00
Daniel Beer
3c31aa0987 Fix potential leak on allocation failure in quirc_resize(). 2017-05-18 19:29:02 +12:00
Edward Cragg
c50a89276f identify: fix warning 
Fix the following warning when compiling with GCC 6:

lib/identify.c: In function ‘quirc_end’:
lib/identify.c:430:6: warning: ‘last_color’ may be used uninitialized in this function [-Wmaybe-uninitialized]
  int last_color;
      ^~~~~~~~~~
 2017-04-30 10:42:14 +01:00
Michael Bradshaw
e0a5f5fd3f Fix documentation regarding cell_bitmap indexing 2017-04-25 04:27:17 -07:00
Daniel Beer
84eccbf077 Fix out-of-bounds read in fitness_all(). 2017-03-30 18:05:49 +13:00
Philippe Groarke
64a4e58543 quirc.h : Fix C++ function name mangling with extern C. 2017-02-16 14:32:18 -05:00
Daniel Beer
59182ef1cd Deinterleave blocks correct. 
Use explicit small-block count. Derived value using greedy calculation
wasn't correct in many cases.
 2016-12-28 15:37:18 +13:00
Daniel Beer
fccbbce758 version_db.c: fix basic errors. 2016-12-28 14:09:06 +13:00
Daniel Beer
88774dc6cf decode.c: fix count bit-width on alphanumeric payloads. 2016-11-17 11:37:55 +13:00
Alexandre Perrin
6f0ed74aa2 Comment typo. 2016-10-04 11:13:49 +02:00
Alexandre Perrin
93adbb0b11 Avoid division by zero. 
Before this patch, small images (i.e. 7x7 pixels or less) could trigger
SIGFPE because of a (integer) division by zero.
 2016-10-04 11:10:55 +02:00
Daniel Beer
87e79e769b Fix Reed-Solomon decoder. 
Calculate the correct number of syndromes, and fix calculation of the
error locator polynomial. Many QR codes with logos in the middle should
now work.
 2016-09-23 14:34:07 +12:00
Daniel Beer
ab341691c9 Add support for ECI decoding. 
ECI values are decoded and stored in the eci field of struct quirc_data.
Constants of the form QUIRC_ECI_* are defined in quirc.h.
 2016-09-23 09:50:59 +12:00
Alexandre Perrin
3a6efb3d84 Large images decoding support 
Fix #2, this patch makes large images support a compile time option by
allowing QUIRC_MAX_REGIONS to be tuned via CFLAGS up to 65534 (current
default is 254).
 2016-07-15 14:40:40 +02:00
Daniel Beer
42c79481e7 decode: support multiple data segments. 
Previously, the payload was assumed to consist of one large data
segment. Now, multiple segments of different types may be concatenated
together. The data type reported is the highest data type encountered
while decoding.
 2013-05-29 10:26:13 +12:00
Daniel Beer
daf6d7c90b decode: fix reversed tuples in numeric decoder. 2013-05-29 09:40:46 +12:00
Daniel Beer
0335fabf97 Fix decoding of numeric and alphanumeric data types. 
If the number of characters in the stream isn't a multiple of the full
tuple size, the remaining characters are encoded in a special short
tuple.
 2013-05-14 09:25:05 +12:00
Daniel Beer
8d0eb68255 test_neighbours: fix warnings in static analyzer. 
Coverity complains that a negative value of best_v might be passed to
record_qr_grid().

Fix supplied by Harald Eilertsen (http://github.com/snake66/).
 2013-02-02 18:07:22 +13:00