Hi Torsten, Daniel,
To Daniel Alejandro:
Good news. Just keep trying reinserting the module and relaunching the
application.
I attached a small file called v4l2dumper.c which is the first program i wrote to test the driver on a remote machine.
Just compile it and run it as following:
$ v4l2dumper test
where test will be the prefix for all the pictures captured. So just insert the kernel driver and run this small shell
program. The program will capture images for 5 seconds and write them to separate files. Those will be raw pictures (i.e
without headers) and you'll have to open them using a special tool (I used Paint Shop Pro on Windows) where you'll have
to specify also the pitch. It should be something between 640 and 670.
To Torsten Spindler:
It means you actually got something and LiveCam wasn't able to display it. Could you debug it? Could you check the
buffer size as returned by the VIDIOC_DQBUF ioctl call?
BR,
Ilyes Gouta.
Dan¡el Alejandro Fuentes wrote:
Hi!,
here I again!
Finally, I was able to resolve my problems with the Qt libraries.
Donwload and install the kernel 2.6.24-rc3.
Rebuilding the module's branch m5602-ov9650-2 is inserted perfectly to
the kernel,.
But after running livecam (using stream bayer capturing) this apparently
did not catch anything.
The status bar displays momentarily 'Ready', and then stands displaying
'Bison Cam @ 0 FPS.'
I do not think that this will be of great help, is there any other test
that may do more?
Daniel Fuentes
PD: with the kernel 2.6.18, i have the same results.
Ilyes Gouta escribió:
Hi Daniel,
Yes I suspected it. So it's a conflict between Qt versions.
Well unfortunately no, I'm not aware of any other application that's
able to display raw bayer streams. Could you get access to a Fedora
machine and test the stuff on it? There is another point. The driver
is supposed to be compiled for 2.6.24-rc kernels and not for the old
2.6.18. I think the developers have also updated the V4L2 API
meanwhile along with a hefty bunch of fixes for the USB stack.
BR,
Ilyes Gouta.
Dan¡el Alejandro Fuentes wrote:
Hi,
my system is a Debian etch, with kernel 2.6.18.
I am not entirely sure, but I think my version of Qt is 4.2 (at
least, is the version are be showing in the Qt's libraries in /usr/lib).
However, livecam appears to be compiled and linked with qt 3.3.7.
I installed libraries (from the repositories of Debian) with
debugging symbols, and gdb throws me:
35 QApplication App(argc, argv);
(gdb) next
Program received signal SIGFPE, Arithmetic exception.
0xb795dd05 in create_dpis () at kernel/qpaintdevice_x11.cpp:531
531 kernel/qpaintdevice_x11.cpp: No existe el fichero o el
directorio.
in kernel/qpaintdevice_x11.cpp
So you reason, the problem is in my Qt libraries.
I will continue to seek a solution, meanwhile
Is this the driver in a position to be tested with another
application? (for instance: xawtv)
Daniel
Ilyes Gouta escribió:
Hi Daniel,
I've never seen this kind of errors in Qt or LiveCam. Can you
provide me with more details concerning your machine, OS, etc. Can
you get exactly the instruction where the program crashes? (for
example in gdb, you can do: disass 0xb78ebd00 0xb78ebd10 to
disassemble the machine code). 0xb78ebd05 is in the destructor of
QPaintDevice and that's rather strange... Could you try to update
your Qt library?
BR,
Ilyes Gouta.
Dan¡el Alejandro Fuentes wrote:
Hi,
after updating and compiling (configure && make && make install),
I can't execute livecam (Exception floating point).
I do't have experience using gdb, he give me:
(gdb) start -dograb
Breakpoint 1 at 0x804e566: file main.cpp, line 36.
Starting program: /home/daniel/proyectos/livecam/trunk/livecam
-dograb
[Thread debugging using libthread_db enabled]
[New Thread -1233844544 (LWP 15859)]
[Switching to Thread -1233844544 (LWP 15859)]
main (argc=2, argv=0xbfe0b5b4) at main.cpp:36
36 V4L2Viewer Viewer;
(gdb) next
33 int main(int argc, char **argv)
(gdb) next
35 QApplication App(argc, argv);
gdb) next
33 int main(int argc, char **argv)
(gdb) next
35 QApplication App(argc, argv);
(gdb) next
Program received signal SIGFPE, Arithmetic exception.
0xb78ebd05 in QPaintDevice::~QPaintDevice () from
/usr/lib/libqt-mt.so.3
(gdb) info line
Line 35 of "main.cpp" starts at address 0x804e56f <main+31> and
ends at 0x804e572 <main+34>.
Moreover, the branch m5602-ov9560-2, compiles and inserted correctly.
Runing dmesg:
m560x/branches/m5602-ov9650-2/m5602.c: usb_m5602_init - WebCam
driver startup
m560x/branches/m5602-ov9650-2/m5602.c: BisonCam webcam found.
m560x/branches/m5602-ov9650-2/m5602.c: [usb_m5602_probe:871] cam
cc788000
m560x/branches/m5602-ov9650-2/m5602.c:
[m5602_initialize_camera:253] m5602_initialize_camera
m560x/branches/m5602-ov9650-2/m5602.c: m5602_probe - m5602
WebCam driver is now controlling video device 0
usbcore: registered new driver m5602
m560x/branches/m5602-ov9650-2/m5602.c: 0.1.0:M5602 Webcam Driver
Daniel Fuentes
Ilyes Gouta escribió:
Hi Fellow,
I updated the m5602-ov9560-2 and livecam branches yesterday and I
was wondering if you guys could give it a shot just to see if you
can get something (using livecam, bayer stream only) from your
sensors.
Just to recall it a bit, you can check out your livecam from the
following URL:
https://livecam.svn.sourceforge.net/svnroot/livecam/trunk
LiveCam has the ability to alter the pitch of the pictures on the
fly. The option is available through Debug | Adjust Pitch, from
the application's menu.
Waiting for your reports.
BR,
Ilyes Gouta.
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/***************************************************************************
* Copyright (C) 2006 by Ilyes Gouta *
* [EMAIL PROTECTED] *
* *
* This 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. *
***************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <time.h>
#include <sys/time.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#undef __STRICT_ANSI__
#include <linux/types.h>
#include <linux/videodev2.h>
#include <pthread.h>
#define CAPTURE_BUFFERS 32
static int fd;
static volatile int bCapture;
static pthread_t hThread;
static struct v4l2_buffer *pBuffers;
static struct v4l2_format fmt;
static unsigned char **pRawData;
static char* pFNPrefix;
void* WorkerThread(void* pData)
{
struct v4l2_buffer buffer;
struct timespec req, rem;
char filename[256];
int count = 0;
FILE *hFile;
while (bCapture)
{
buffer.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
if (ioctl(fd, VIDIOC_DQBUF, &buffer) >= 0)
{
sprintf(filename, "%s%d.raw", pFNPrefix, count);
printf("dumping frame %d (buffer index: %d) in %s\n", count,
buffer.index, filename);
hFile = fopen(filename, "wb");
fwrite(pRawData[buffer.index], 1, fmt.fmt.pix.sizeimage, hFile);
fclose(hFile);
count++;
if (!bCapture) break;
buffer.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
ioctl(fd, VIDIOC_QBUF, &buffer);
} else {
printf("VIDIOC_DQBUF failed.\n");
}
/* wait for 30 ms */
req.tv_sec = 0;
req.tv_nsec = 33000000;
nanosleep(&req, &rem);
}
return NULL;
}
void initialize()
{
fd = -1;
pBuffers = (struct v4l2_buffer*)malloc(CAPTURE_BUFFERS * sizeof(struct
v4l2_buffer));
pRawData = (unsigned char**)malloc(CAPTURE_BUFFERS * sizeof(unsigned
char*));
}
void finalize()
{
if (pBuffers) free(pBuffers);
if (pRawData) free(pRawData);
pBuffers = NULL;
pRawData = NULL;
}
int start(char* devname)
{
struct v4l2_capability caps;
struct v4l2_requestbuffers request;
int i, type, result;
fd = open(devname, O_RDWR);
if (fd == -1) return 0;
if (ioctl(fd, VIDIOC_QUERYCAP, &caps) == -1) {
close(fd); fd = -1;
return 0;
}
printf("device name: %s\n", (char*)caps.card);
if (!(caps.capabilities & V4L2_CAP_VIDEO_CAPTURE)) {
close(fd); fd = -1;
printf("device doesn't support V4L2.\n");
return 0;
}
fcntl(fd, F_SETFD, FD_CLOEXEC);
fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
fmt.fmt.pix.width = 640;
fmt.fmt.pix.height = 480;
fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_SBGGR8;
result = ioctl(fd, VIDIOC_TRY_FMT, &fmt);
if (result < 0) {
printf("VIDIOC_TRY_FMT failed.\n");
}
printf("picture size: %d\n", fmt.fmt.pix.sizeimage);
/* set the capture format */
if (ioctl(fd, VIDIOC_S_FMT, &fmt) == -1) {
close(fd); fd = -1;
printf("device doesn't support this capture format.\n");
return 0;
}
memset(&request, 0, sizeof(struct v4l2_requestbuffers));
request.count = CAPTURE_BUFFERS;
request.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
request.memory = V4L2_MEMORY_MMAP;
/* set the type of the capture */
if (ioctl(fd, VIDIOC_REQBUFS, &request) == -1) {
close(fd); fd = -1;
printf("VIDIOC_REQBUFS failed.\n");
return 0;
}
for (i = 0; i < CAPTURE_BUFFERS; i++)
{
memset(&pBuffers[i], 0, sizeof(struct v4l2_buffer));
pBuffers[i].index = i;
pBuffers[i].type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
pBuffers[i].memory = V4L2_MEMORY_MMAP;
if (ioctl(fd, VIDIOC_QUERYBUF, &pBuffers[i], 0)) {
close(fd); fd = -1;
printf("VIDIOC_QUERYBUF failed.\n");
return 0;
}
/* obtain a userspace pointer on the capture buffer */
void *pData = mmap(NULL, pBuffers[i].length, PROT_READ | PROT_WRITE,
MAP_SHARED, fd, pBuffers[i].m.offset);
if (pData == (void*)-1) {
close(fd); fd = -1;
printf("mmap failed. buffer length: %d, offset:0x%x\n",
pBuffers[i].length, pBuffers[i].m.offset);
return 0;
}
pRawData[i] = (unsigned char*)pData;
}
/* queue the buffers for capture*/
for (i = 0; i < CAPTURE_BUFFERS; i++) {
ioctl(fd, VIDIOC_QBUF, &pBuffers[i]);
}
/* start the capture */
type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
if (ioctl(fd, VIDIOC_STREAMON, &type) == -1) {
close(fd); fd = -1;
printf("failed starting capture.\n");
return 0;
}
bCapture = 1;
if (pthread_create(&hThread, NULL, WorkerThread, NULL)) {
close(fd); fd = -1;
return 0;
}
return 1;
}
void stop()
{
if (fd == -1) return;
bCapture = 0;
/* stop the capture */
int type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
ioctl(fd, VIDIOC_STREAMOFF, &type);
pthread_join(hThread, NULL);
close(fd); fd = -1;
}
int main(int argc, char** argv)
{
if (argc != 2) {
printf("usage:\n\t$ v4l2dumper <filename prefix>\n");
return 0;
}
pFNPrefix = argv[1];
initialize();
if (start("/dev/video0")) {
sleep(3);
stop();
}
finalize();
return 0;
}
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