|
|
|
@ -30,19 +30,34 @@
@@ -30,19 +30,34 @@
|
|
|
|
|
size_t length; |
|
|
|
|
}; |
|
|
|
|
|
|
|
|
|
static void xioctl(int fh, int request, void *arg) |
|
|
|
|
{ |
|
|
|
|
int r; |
|
|
|
|
|
|
|
|
|
do { |
|
|
|
|
r = v4l2_ioctl(fh, request, arg); |
|
|
|
|
} while (r == -1 && ((errno == EINTR) || (errno == EAGAIN))); |
|
|
|
|
|
|
|
|
|
if (r == -1) { |
|
|
|
|
fprintf(stderr, "error %d, %s\n", errno, strerror(errno)); |
|
|
|
|
exit(EXIT_FAILURE); |
|
|
|
|
} |
|
|
|
|
} |
|
|
|
|
int verbosity; |
|
|
|
|
|
|
|
|
|
/* --------------------------------------------------------------------- */ |
|
|
|
|
|
|
|
|
|
static void xioctl(int fh, int request, void *arg) |
|
|
|
|
{ |
|
|
|
|
int r; |
|
|
|
|
|
|
|
|
|
do { |
|
|
|
|
r = v4l2_ioctl(fh, request, arg); |
|
|
|
|
} while (r == -1 && ((errno == EINTR) || (errno == EAGAIN))); |
|
|
|
|
|
|
|
|
|
if (r == -1) { |
|
|
|
|
fprintf(stderr, "error %d, %s\n", errno, strerror(errno)); |
|
|
|
|
exit(EXIT_FAILURE); |
|
|
|
|
} |
|
|
|
|
} |
|
|
|
|
/* --------------------------------------------------------------------- */ |
|
|
|
|
void help(int v) |
|
|
|
|
{ |
|
|
|
|
puts("options :"); |
|
|
|
|
puts("\t-d /dev/?\tselect video device"); |
|
|
|
|
puts("\t-n NNN\t\thow many frames ?"); |
|
|
|
|
puts("\t-p NNN\t\tperiod in seconds"); |
|
|
|
|
puts("\t-v\t\tincrease verbosity"); |
|
|
|
|
exit(0); |
|
|
|
|
} |
|
|
|
|
/* --------------------------------------------------------------------- */ |
|
|
|
|
|
|
|
|
|
int main(int argc, char **argv) |
|
|
|
|
{ |
|
|
|
@ -59,106 +74,130 @@
@@ -59,106 +74,130 @@
|
|
|
|
|
FILE *fout; |
|
|
|
|
struct buffer *buffers; |
|
|
|
|
|
|
|
|
|
fd = v4l2_open(dev_name, O_RDWR | O_NONBLOCK, 0); |
|
|
|
|
if (fd < 0) { |
|
|
|
|
perror("Cannot open device"); |
|
|
|
|
exit(EXIT_FAILURE); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
CLEAR(fmt); |
|
|
|
|
fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
|
|
|
|
fmt.fmt.pix.width = 640; |
|
|
|
|
fmt.fmt.pix.height = 480; |
|
|
|
|
fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_RGB24; |
|
|
|
|
fmt.fmt.pix.field = V4L2_FIELD_INTERLACED; |
|
|
|
|
xioctl(fd, VIDIOC_S_FMT, &fmt); |
|
|
|
|
if (fmt.fmt.pix.pixelformat != V4L2_PIX_FMT_RGB24) { |
|
|
|
|
printf("Libv4l didn't accept RGB24 format. Can't proceed.\n"); |
|
|
|
|
exit(EXIT_FAILURE); |
|
|
|
|
} |
|
|
|
|
if ((fmt.fmt.pix.width != 640) || (fmt.fmt.pix.height != 480)) |
|
|
|
|
printf("Warning: driver is sending image at %dx%d\n", |
|
|
|
|
int period = 10; /* delai entre les captures */ |
|
|
|
|
int nbre_capt = 1; /* nombre de captures */ |
|
|
|
|
int opt; |
|
|
|
|
|
|
|
|
|
while ((opt = getopt(argc, argv, "d:hn:p:v")) != -1) { |
|
|
|
|
switch(opt) { |
|
|
|
|
case 'd': dev_name = optarg; break; |
|
|
|
|
case 'h': help(0); break; |
|
|
|
|
case 'n': nbre_capt = atoi(optarg); break; |
|
|
|
|
case 'p': period = atoi(optarg); break; |
|
|
|
|
case 'v': verbosity++; break; |
|
|
|
|
} |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
fd = v4l2_open(dev_name, O_RDWR | O_NONBLOCK, 0); |
|
|
|
|
if (fd < 0) { |
|
|
|
|
perror("Cannot open device"); |
|
|
|
|
exit(EXIT_FAILURE); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
CLEAR(fmt); |
|
|
|
|
fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
|
|
|
|
fmt.fmt.pix.width = 640; |
|
|
|
|
fmt.fmt.pix.height = 480; |
|
|
|
|
fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_RGB24; |
|
|
|
|
fmt.fmt.pix.field = V4L2_FIELD_INTERLACED; |
|
|
|
|
xioctl(fd, VIDIOC_S_FMT, &fmt); |
|
|
|
|
if (fmt.fmt.pix.pixelformat != V4L2_PIX_FMT_RGB24) { |
|
|
|
|
printf("Libv4l didn't accept RGB24 format. Can't proceed.\n"); |
|
|
|
|
exit(EXIT_FAILURE); |
|
|
|
|
} |
|
|
|
|
if ((fmt.fmt.pix.width != 640) || (fmt.fmt.pix.height != 480)) { |
|
|
|
|
printf("Warning: driver is sending image at %dx%d\n", |
|
|
|
|
fmt.fmt.pix.width, fmt.fmt.pix.height); |
|
|
|
|
|
|
|
|
|
CLEAR(req); |
|
|
|
|
req.count = 2; |
|
|
|
|
req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
|
|
|
|
req.memory = V4L2_MEMORY_MMAP; |
|
|
|
|
xioctl(fd, VIDIOC_REQBUFS, &req); |
|
|
|
|
|
|
|
|
|
buffers = calloc(req.count, sizeof(*buffers)); |
|
|
|
|
for (n_buffers = 0; n_buffers < req.count; ++n_buffers) { |
|
|
|
|
CLEAR(buf); |
|
|
|
|
|
|
|
|
|
buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
|
|
|
|
buf.memory = V4L2_MEMORY_MMAP; |
|
|
|
|
buf.index = n_buffers; |
|
|
|
|
|
|
|
|
|
xioctl(fd, VIDIOC_QUERYBUF, &buf); |
|
|
|
|
|
|
|
|
|
buffers[n_buffers].length = buf.length; |
|
|
|
|
buffers[n_buffers].start = v4l2_mmap(NULL, buf.length, |
|
|
|
|
PROT_READ | PROT_WRITE, MAP_SHARED, |
|
|
|
|
fd, buf.m.offset); |
|
|
|
|
|
|
|
|
|
if (MAP_FAILED == buffers[n_buffers].start) { |
|
|
|
|
perror("mmap"); |
|
|
|
|
exit(EXIT_FAILURE); |
|
|
|
|
} |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
for (i = 0; i < n_buffers; ++i) { |
|
|
|
|
CLEAR(buf); |
|
|
|
|
buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
|
|
|
|
buf.memory = V4L2_MEMORY_MMAP; |
|
|
|
|
buf.index = i; |
|
|
|
|
xioctl(fd, VIDIOC_QBUF, &buf); |
|
|
|
|
} |
|
|
|
|
type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
|
|
|
|
|
|
|
|
|
xioctl(fd, VIDIOC_STREAMON, &type); |
|
|
|
|
for (i = 0; i < 10; i++) { |
|
|
|
|
do { |
|
|
|
|
FD_ZERO(&fds); |
|
|
|
|
FD_SET(fd, &fds); |
|
|
|
|
|
|
|
|
|
/* Timeout. */ |
|
|
|
|
tv.tv_sec = 2; |
|
|
|
|
tv.tv_usec = 0; |
|
|
|
|
|
|
|
|
|
r = select(fd + 1, &fds, NULL, NULL, &tv); |
|
|
|
|
} while ((r == -1 && (errno = EINTR))); |
|
|
|
|
if (r == -1) { |
|
|
|
|
perror("select"); |
|
|
|
|
return errno; |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
CLEAR(buf); |
|
|
|
|
buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
|
|
|
|
buf.memory = V4L2_MEMORY_MMAP; |
|
|
|
|
xioctl(fd, VIDIOC_DQBUF, &buf); |
|
|
|
|
|
|
|
|
|
sprintf(out_name, "out%03d.ppm", i); |
|
|
|
|
fprintf(stderr, "--> %s\n", out_name); |
|
|
|
|
fout = fopen(out_name, "w"); |
|
|
|
|
if (!fout) { |
|
|
|
|
perror("Cannot open image"); |
|
|
|
|
exit(EXIT_FAILURE); |
|
|
|
|
} |
|
|
|
|
fprintf(fout, "P6\n%d %d 255\n", |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
CLEAR(req); |
|
|
|
|
req.count = 2; |
|
|
|
|
req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
|
|
|
|
req.memory = V4L2_MEMORY_MMAP; |
|
|
|
|
xioctl(fd, VIDIOC_REQBUFS, &req); |
|
|
|
|
|
|
|
|
|
buffers = calloc(req.count, sizeof(*buffers)); |
|
|
|
|
for (n_buffers = 0; n_buffers < req.count; ++n_buffers) { |
|
|
|
|
CLEAR(buf); |
|
|
|
|
|
|
|
|
|
buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
|
|
|
|
buf.memory = V4L2_MEMORY_MMAP; |
|
|
|
|
buf.index = n_buffers; |
|
|
|
|
|
|
|
|
|
xioctl(fd, VIDIOC_QUERYBUF, &buf); |
|
|
|
|
|
|
|
|
|
buffers[n_buffers].length = buf.length; |
|
|
|
|
buffers[n_buffers].start = v4l2_mmap(NULL, buf.length, |
|
|
|
|
PROT_READ | PROT_WRITE, MAP_SHARED, |
|
|
|
|
fd, buf.m.offset); |
|
|
|
|
|
|
|
|
|
if (MAP_FAILED == buffers[n_buffers].start) { |
|
|
|
|
perror("mmap"); |
|
|
|
|
exit(EXIT_FAILURE); |
|
|
|
|
} |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
for (i = 0; i < n_buffers; ++i) { |
|
|
|
|
CLEAR(buf); |
|
|
|
|
buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
|
|
|
|
buf.memory = V4L2_MEMORY_MMAP; |
|
|
|
|
buf.index = i; |
|
|
|
|
xioctl(fd, VIDIOC_QBUF, &buf); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
|
|
|
|
|
|
|
|
|
xioctl(fd, VIDIOC_STREAMON, &type); |
|
|
|
|
for (i = 0; i < nbre_capt; i++) { |
|
|
|
|
do { |
|
|
|
|
FD_ZERO(&fds); |
|
|
|
|
FD_SET(fd, &fds); |
|
|
|
|
|
|
|
|
|
/* Timeout. */ |
|
|
|
|
tv.tv_sec = 2; |
|
|
|
|
tv.tv_usec = 0; |
|
|
|
|
|
|
|
|
|
r = select(fd + 1, &fds, NULL, NULL, &tv); |
|
|
|
|
} while ((r == -1 && (errno = EINTR))); |
|
|
|
|
|
|
|
|
|
if (r == -1) { |
|
|
|
|
perror("select"); |
|
|
|
|
return errno; |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
CLEAR(buf); |
|
|
|
|
buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
|
|
|
|
buf.memory = V4L2_MEMORY_MMAP; |
|
|
|
|
xioctl(fd, VIDIOC_DQBUF, &buf); |
|
|
|
|
|
|
|
|
|
sprintf(out_name, "out%03d.ppm", i); |
|
|
|
|
if (verbosity) fprintf(stderr, "--> %s\n", out_name); |
|
|
|
|
|
|
|
|
|
fout = fopen(out_name, "w"); |
|
|
|
|
if (!fout) { |
|
|
|
|
perror("Cannot open image"); |
|
|
|
|
exit(EXIT_FAILURE); |
|
|
|
|
} |
|
|
|
|
fprintf(fout, "P6\n%d %d 255\n", |
|
|
|
|
fmt.fmt.pix.width, fmt.fmt.pix.height); |
|
|
|
|
fwrite(buffers[buf.index].start, buf.bytesused, 1, fout); |
|
|
|
|
fclose(fout); |
|
|
|
|
sleep(666); |
|
|
|
|
fwrite(buffers[buf.index].start, buf.bytesused, 1, fout); |
|
|
|
|
fclose(fout); |
|
|
|
|
if (nbre_capt > 1 && period) { |
|
|
|
|
sleep(period); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
xioctl(fd, VIDIOC_QBUF, &buf); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
xioctl(fd, VIDIOC_QBUF, &buf); |
|
|
|
|
} |
|
|
|
|
type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
|
|
|
|
xioctl(fd, VIDIOC_STREAMOFF, &type); |
|
|
|
|
for (i = 0; i < n_buffers; ++i) { |
|
|
|
|
v4l2_munmap(buffers[i].start, buffers[i].length); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
|
|
|
|
xioctl(fd, VIDIOC_STREAMOFF, &type); |
|
|
|
|
for (i = 0; i < n_buffers; ++i) |
|
|
|
|
v4l2_munmap(buffers[i].start, buffers[i].length); |
|
|
|
|
v4l2_close(fd); |
|
|
|
|
v4l2_close(fd); |
|
|
|
|
|
|
|
|
|
return 0; |
|
|
|
|
} |
|
|
|
|
return 0; |
|
|
|
|
} |
|
|
|
|