tina fey fakes jobs :)
2009 Linux Kernel Summit
What I am surprise on? Look, a piece of perl script...
--
2009 Linux Kernel Summit
Hi folks,
It's time to start kicking off the 2009 Kernel Summit planning
process. This year, the Kernel Summit will be held in Tokyo, Japan,
on October 18-20, just before the 1st annual Japan Linux Sympsium.
As in previous years, I've set up a e-mail discussion list for
people who are interested in making suggestions for this year's kernel
summit. In the probably hopeless attempt to avoid the list address
getting instantly harvested by spammers from all of the LKML archives,
the list submission address and subscription URL can be found by
executing the following perl script:
This year's program committee is:
James Bottomley
Jonathon Corbet
Dirk Hohndel
Dave Jones
Greg Kroah-Hartman
Chris Mason
Andrew Morton
Theodore Ts'o
Arjan van de Ven
If you have any questions, please feel to contact me or the entire
kernel summit program committee. Our contact e-mail address can be
found by taking the output from the above perl script and running it
through the command: "sed -e 's/discuss/pc/'".
We'll give people a few days to subscribe before we kick off discussion
on the the new kernel summit mailing list.
Regards,
- Ted
P.S. Note that we are aware that given the economic conditions this
year, getting travel funding may be particularly difficult. For that
reason, we have budgeted extra money for travel scholarships, and we
will be working with various Linux Foundation corporate members who have
historically sent many kernel developers to the Kernel Summit to try to
make sure that everyone who gets an invitation will be able to attend.
how HR/programmer reads your resume
掩嘴偷笑
what's twitter?
Why People Seem to Have Free Time
is this a bug in libjpeg source code?
Just for a work task, I need use libjpeg to compress my YUV data into a jpeg file.
I ran "sudo apt-get source libjpeg62" from my Ubuntu and read the code.
I need to set color space parameters into the structure libjpeg needs.
But it seems something wrong here:
355 * Select an appropriate JPEG colorspace for in_color_space.
356 */
357
358 GLOBAL(void)
359 jpeg_default_colorspace (j_compress_ptr cinfo)
360 {
361 switch (cinfo->in_color_space) {
362 case JCS_GRAYSCALE:
363 jpeg_set_colorspace(cinfo, JCS_GRAYSCALE);
364 break;
365 case JCS_RGB:
366 jpeg_set_colorspace(cinfo, JCS_YCbCr);
367 break;
368 case JCS_YCbCr:
369 jpeg_set_colorspace(cinfo, JCS_YCbCr);
370 break;
371 case JCS_CMYK:
372 jpeg_set_colorspace(cinfo, JCS_CMYK); /* By default, no translation */
373 break;
374 case JCS_YCCK:
375 jpeg_set_colorspace(cinfo, JCS_YCCK);
376 break;
377 case JCS_UNKNOWN:
378 jpeg_set_colorspace(cinfo, JCS_UNKNOWN);
379 break;
380 default:
381 ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE);
382 }
383 }
Pls red highlight code lines.
I absolutely believe here is a but because they pass same parameter with two different cases.
I can proof by following code of jpeg_set_colorspace().
426 cinfo->write_Adobe_marker = TRUE; /* write Adobe marker to flag RGB */
427 cinfo->num_components = 3;
428 SET_COMP(0, 0x52 /* 'R' */, 1,1, 0, 0,0);
429 SET_COMP(1, 0x47 /* 'G' */, 1,1, 0, 0,0);
430 SET_COMP(2, 0x42 /* 'B' */, 1,1, 0, 0,0);
431 break;
432 case JCS_YCbCr:
433 cinfo->write_JFIF_header = TRUE; /* Write a JFIF marker */
434 cinfo->num_components = 3;
435 /* JFIF specifies component IDs 1,2,3 */
436 /* We default to 2x2 subsamples of chrominance */
437 SET_COMP(0, 1, 2,2, 0, 0,0);
438 SET_COMP(1, 2, 1,1, 1, 1,1);
439 SET_COMP(2, 3, 1,1, 1, 1,1);
440 break;
They use different matrix.
I tried to submit this bug to author but I can't find out his email address.
Wikipedia.org mentioned the libjpeg's profile but no email address.
| libjpeg | |
|---|---|
| Developed by | Independent JPEG Group |
| Latest release | 6b / 27 March 1998 |
| Written in | C |
| Type | library |
| License | Free, can be used in commercial applications without royalty, with acknowledgement. |
| Website | ijg.org |
If someone know that pls let me know. If I am wrong pls let me know.
stranger gtk thread issue
For a new task from my job, I need write a GTK application. It's fresh new to me. Yes, I have some years experience on Window$ application development. I have almost used everything of MFC in the past. I guess most UI frameworks are similar. MVC, window,
msg, archive, etc. But at least cocoa is quite different to MFC in something "work style". Just look at sample code of GTK, it is also something different to MFC. Whatever, a new domain is always interesting.
Back to the subject, I wrote a piece of code from scratch. Today, I want to add thread support for more complicated functions.
But I always got a segment fault on g_thread_init(NULL). And I just use a piece of official code from gnome.org it still fails.
main (int argc, char *argv[])
{
GtkWidget *window;
g_thread_init (NULL);
gdk_threads_init ();
gtk_init (&argc, &argv);
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_widget_show (window);
gdk_threads_enter ();
gtk_main ();
gdk_threads_leave ();
return 0;
}
My compile command line is easy too.
`pkg-config --cflags --libs gtk+-2.0 gthread`
After many many try and many many failures, I have to look at a large Makefile of another open source software's source code tree. After remove libraries one by one from about thirty libraries, I locate the root cause is --
I need use ghread-2.0 rather than gthread.
arm has dual-core too
shocking on OpenCV
For an internal project, I just study opencv library this night.
Tried to retrieve source code from cvs respository from sf.net but failed as it does not allow anonymous to access it anymore.
Once time I almost gave up it with my mac. i turned on my linux desktop and hope can do it with my ubuntu. But I remember
that my two cameras with OV chip do not work with my ubuntu and I have not tried to fix it.
Back to my mac, i downloaded prebuilt dmg file but have no idea about how to install it. It includes a sample code so call FaceTracking and a OpenCV.framework. After many tries to place framework folder to somewhere, I got it. Just copy
framework folder on a place which FaceTracking also be placed. I compiled it by XCode and run it.
It works excellent. I never expect it work so good like what I see. The main window shows my head which my camera always capturing. and once my face turn to a right angel then the facetracking will recognize my face correctly.
It's so wonderful. I have not been so excited long time.