c-qcam - Connectix Color QuickCam video4linux kernel driver
Copyright (C) 1999 Dave Forrest <drf5n@virginia.edu>
- released under GNU GPL.
+ released under GNU GPL.
1999-12-08 Dave Forrest, written with kernel version 2.2.12 in mind
CONFIG_PNP_PARPORT M for autoprobe.o IEEE1284 readback module
CONFIG_PRINTER_READBACK M for parport_probe.o IEEE1284 readback module
CONFIG_VIDEO_DEV M for videodev.o video4linux module
- CONFIG_VIDEO_CQCAM M for c-qcam.o Color Quickcam module
+ CONFIG_VIDEO_CQCAM M for c-qcam.o Color Quickcam module
With these flags, the kernel should compile and install the modules.
To record and monitor the compilation, I use:
(make zlilo ; \
make modules; \
- make modules_install ;
+ make modules_install ;
depmod -a ) &>log &
less log # then a capital 'F' to watch the progress
-
+
But that is my personal preference.
2.2 Configuration
-
+
The configuration requires module configuration and device
configuration. I like kmod or kerneld process with the
/etc/modprobe.conf file so the modules can automatically load/unload as
these procedures.
-2.1 Module Configuration
+2.1 Module Configuration
Using modules requires a bit of work to install and pass the
parameters. Understand that entries in /etc/modprobe.conf of:
(CONFIG_PRINTER), the IEEE 1284 system,(CONFIG_PRINTER_READBACK), you
should be able to read some identification from your quickcam with
- modprobe -v parport
- modprobe -v parport_probe
- cat /proc/parport/PORTNUMBER/autoprobe
+ modprobe -v parport
+ modprobe -v parport_probe
+ cat /proc/parport/PORTNUMBER/autoprobe
Returns:
CLASS:MEDIA;
MODEL:Color QuickCam 2.0;
and well. A common problem is that the current driver does not
reliably detect a c-qcam, even though one is attached. In this case,
- modprobe -v c-qcam
+ modprobe -v c-qcam
or
insmod -v c-qcam
3.1 Checklist:
Can you get an image?
- v4lgrab >qcam.ppm ; wc qcam.ppm ; xv qcam.ppm
+ v4lgrab >qcam.ppm ; wc qcam.ppm ; xv qcam.ppm
- Is a working c-qcam connected to the port?
- grep ^ /proc/parport/?/autoprobe
+ Is a working c-qcam connected to the port?
+ grep ^ /proc/parport/?/autoprobe
- Do the /dev/video* files exist?
- ls -lad /dev/video
+ Do the /dev/video* files exist?
+ ls -lad /dev/video
- Is the c-qcam module loaded?
- modprobe -v c-qcam ; lsmod
+ Is the c-qcam module loaded?
+ modprobe -v c-qcam ; lsmod
Does the camera work with alternate programs? cqcam, etc?
isn't, you might try patching the c-qcam module to add a parport=xxx
option as in the bw-qcam module so you can specify the parallel port:
- insmod -v c-qcam parport=0
+ insmod -v c-qcam parport=0
And bypass the detection code, see ../../drivers/char/c-qcam.c and
look for the 'qc_detect' code and call.
this work is documented at the video4linux2 site listed below.
-9.0 --- A sample program using v4lgrabber,
+9.0 --- A sample program using v4lgrabber,
This program is a simple image grabber that will copy a frame from the
first video device, /dev/video0 to standard output in portable pixmap
format (.ppm) Using this like: 'v4lgrab | convert - c-qcam.jpg'
-produced this picture of me at
+produced this picture of me at
http://mug.sys.virginia.edu/~drf5n/extras/c-qcam.jpg
-------------------- 8< ---------------- 8< -----------------------------
* Use as:
* v4lgrab >image.ppm
*
- * Copyright (C) 1998-05-03, Phil Blundell <philb@gnu.org>
- * Copied from http://www.tazenda.demon.co.uk/phil/vgrabber.c
+ * Copyright (C) 1998-05-03, Phil Blundell <philb@gnu.org>
+ * Copied from http://www.tazenda.demon.co.uk/phil/vgrabber.c
* with minor modifications (Dave Forrest, drf5n@virginia.edu).
*
*/
#define READ_VIDEO_PIXEL(buf, format, depth, r, g, b) \
{ \
- switch (format) \
- { \
- case VIDEO_PALETTE_GREY: \
- switch (depth) \
- { \
- case 4: \
- case 6: \
- case 8: \
- (r) = (g) = (b) = (*buf++ << 8);\
- break; \
- \
- case 16: \
- (r) = (g) = (b) = \
- *((unsigned short *) buf); \
- buf += 2; \
- break; \
- } \
- break; \
- \
- \
- case VIDEO_PALETTE_RGB565: \
- { \
- unsigned short tmp = *(unsigned short *)buf; \
- (r) = tmp&0xF800; \
- (g) = (tmp<<5)&0xFC00; \
- (b) = (tmp<<11)&0xF800; \
- buf += 2; \
- } \
- break; \
- \
- case VIDEO_PALETTE_RGB555: \
- (r) = (buf[0]&0xF8)<<8; \
- (g) = ((buf[0] << 5 | buf[1] >> 3)&0xF8)<<8; \
- (b) = ((buf[1] << 2 ) & 0xF8)<<8; \
- buf += 2; \
- break; \
- \
- case VIDEO_PALETTE_RGB24: \
- (r) = buf[0] << 8; (g) = buf[1] << 8; \
- (b) = buf[2] << 8; \
- buf += 3; \
- break; \
- \
- default: \
- fprintf(stderr, \
- "Format %d not yet supported\n", \
- format); \
- } \
-}
+ switch (format) \
+ { \
+ case VIDEO_PALETTE_GREY: \
+ switch (depth) \
+ { \
+ case 4: \
+ case 6: \
+ case 8: \
+ (r) = (g) = (b) = (*buf++ << 8);\
+ break; \
+ \
+ case 16: \
+ (r) = (g) = (b) = \
+ *((unsigned short *) buf); \
+ buf += 2; \
+ break; \
+ } \
+ break; \
+ \
+ \
+ case VIDEO_PALETTE_RGB565: \
+ { \
+ unsigned short tmp = *(unsigned short *)buf; \
+ (r) = tmp&0xF800; \
+ (g) = (tmp<<5)&0xFC00; \
+ (b) = (tmp<<11)&0xF800; \
+ buf += 2; \
+ } \
+ break; \
+ \
+ case VIDEO_PALETTE_RGB555: \
+ (r) = (buf[0]&0xF8)<<8; \
+ (g) = ((buf[0] << 5 | buf[1] >> 3)&0xF8)<<8; \
+ (b) = ((buf[1] << 2 ) & 0xF8)<<8; \
+ buf += 2; \
+ break; \
+ \
+ case VIDEO_PALETTE_RGB24: \
+ (r) = buf[0] << 8; (g) = buf[1] << 8; \
+ (b) = buf[2] << 8; \
+ buf += 3; \
+ break; \
+ \
+ default: \
+ fprintf(stderr, \
+ "Format %d not yet supported\n", \
+ format); \
+ } \
+}
int get_brightness_adj(unsigned char *image, long size, int *brightness) {
long i, tot = 0;
if(ioctl(fd, VIDIOCSPICT, &vpic) < 0) {
vpic.depth=6;
if(ioctl(fd, VIDIOCSPICT, &vpic) < 0) {
- vpic.depth=4;
- if(ioctl(fd, VIDIOCSPICT, &vpic) < 0) {
- fprintf(stderr, "Unable to find a supported capture format.\n");
- close(fd);
- exit(1);
- }
+ vpic.depth=4;
+ if(ioctl(fd, VIDIOCSPICT, &vpic) < 0) {
+ fprintf(stderr, "Unable to find a supported capture format.\n");
+ close(fd);
+ exit(1);
+ }
}
}
} else {
vpic.depth=24;
vpic.palette=VIDEO_PALETTE_RGB24;
-
+
if(ioctl(fd, VIDIOCSPICT, &vpic) < 0) {
vpic.palette=VIDEO_PALETTE_RGB565;
vpic.depth=16;
-
+
if(ioctl(fd, VIDIOCSPICT, &vpic)==-1) {
- vpic.palette=VIDEO_PALETTE_RGB555;
- vpic.depth=15;
-
- if(ioctl(fd, VIDIOCSPICT, &vpic)==-1) {
- fprintf(stderr, "Unable to find a supported capture format.\n");
- return -1;
- }
+ vpic.palette=VIDEO_PALETTE_RGB555;
+ vpic.depth=15;
+
+ if(ioctl(fd, VIDIOCSPICT, &vpic)==-1) {
+ fprintf(stderr, "Unable to find a supported capture format.\n");
+ return -1;
+ }
}
}
}
-
+
buffer = malloc(win.width * win.height * bpp);
if (!buffer) {
fprintf(stderr, "Out of memory.\n");
exit(1);
}
-
+
do {
int newbright;
read(fd, buffer, win.width * win.height * bpp);
if (f) {
vpic.brightness += (newbright << 8);
if(ioctl(fd, VIDIOCSPICT, &vpic)==-1) {
- perror("VIDIOSPICT");
- break;
+ perror("VIDIOSPICT");
+ break;
}
}
} while (f);
fputc(g>>8, stdout);
fputc(b>>8, stdout);
}
-
+
close(fd);
return 0;
}
git://git.onelab.eu / linux-2.6.git / blobdiff