static void list_devices()
{
DIR *dp;
struct dirent *ep;
dev_vec files;
dev_map links;
dev_map cards;
struct v4l2_capability vcap;
dp = opendir("/dev");
if (dp == NULL) {
perror ("Couldn't open the directory");
return;
}
while ((ep = readdir(dp)))
if (is_v4l_dev(ep->d_name))
files.push_back(std::string("/dev/") + ep->d_name);
closedir(dp);
/* Find device nodes which are links to other device nodes */
for (dev_vec::iterator iter = files.begin();
iter != files.end(); ) {
char link[64+1];
int link_len;
std::string target;
link_len = readlink(iter->c_str(), link, 64);
if (link_len < 0) { /* Not a link or error */
iter++;
continue;
}
link[link_len] = '\0';
/* Only remove from files list if target itself is in list */
if (link[0] != '/') /* Relative link */
target = std::string("/dev/");
target += link;
if (find(files.begin(), files.end(), target) == files.end()) {
iter++;
continue;
}
/* Move the device node from files to links */
if (links[target].empty())
links[target] = *iter;
else
links[target] += ", " + *iter;
files.erase(iter);
}
std::sort(files.begin(), files.end(), sort_on_device_name);
for (dev_vec::iterator iter = files.begin();
iter != files.end(); ++iter) {
int fd = open(iter->c_str(), O_RDWR);
std::string bus_info;
if (fd < 0)
continue;
doioctl(fd, VIDIOC_QUERYCAP, &vcap);
close(fd);
bus_info = (const char *)vcap.bus_info;
if (cards[bus_info].empty())
cards[bus_info] += std::string((char *)vcap.card) + " (" + bus_info + "):\n";
cards[bus_info] += "\t" + (*iter);
if (!(links[*iter].empty()))
cards[bus_info] += " <- " + links[*iter];
cards[bus_info] += "\n";
}
for (dev_map::iterator iter = cards.begin();
iter != cards.end(); ++iter) {
printf("%s\n", iter->second.c_str());
}
}
void list_devices(std::string &target_name, std::vector<VIDEO_DEVICE> &device_lists)
{
device_lists.clear();
DIR *dp;
struct dirent *ep;
dev_vec files;
dev_map links;
card_map cards;
struct v4l2_capability vcap;
dp = opendir("/dev");
if (dp == NULL) {
perror ("Couldn't open the directory");
return;
}
while ((ep = readdir(dp)))
if (is_v4l_dev(ep->d_name))
files.push_back(std::string("/dev/") + ep->d_name);
closedir(dp);
/* Find device nodes which are links to other device nodes */
for (dev_vec::iterator iter = files.begin();
iter != files.end(); ) {
char link[64+1];
int link_len;
std::string target;
link_len = readlink(iter->c_str(), link, 64);
if (link_len < 0) { /* Not a link or error */
iter++;
continue;
}
link[link_len] = '\0';
/* Only remove from files list if target itself is in list */
if (link[0] != '/') /* Relative link */
target = std::string("/dev/");
target += link;
if (find(files.begin(), files.end(), target) == files.end()) {
iter++;
continue;
}
/* Move the device node from files to links */
if (links[target].empty())
links[target] = *iter;
else
links[target] += ", " + *iter;
files.erase(iter);
}
std::sort(files.begin(), files.end(), sort_on_device_name);
for (dev_vec::iterator iter = files.begin();
iter != files.end(); ++iter)
{
//printf("process %s\n", iter->c_str());
int fd = open(iter->c_str(), O_RDWR);
if (fd < 0)
continue;
doioctl(fd, VIDIOC_QUERYCAP, &vcap);
close(fd);
if(1)
{
printf("\nVIDIOC_QUERYCAP - %s\n"
" driver = %s\n"
" card = %s\n"
" bus_info = %s\n"
" version = %d\n"
" capabilities = %d\n"
" device_caps = %d\n"
" reserved[3] = [%d, %d, %d]\n\n",
iter->c_str(),
vcap.driver,
vcap.card,
vcap.bus_info,
vcap.version,
vcap.capabilities,
67108865/*vcap.device_caps*/,
vcap.reserved[0], vcap.reserved[1], vcap.reserved[2] );
}
std::string card_name = (const char *)vcap.card;
if(target_name == card_name)
{
std::string bus_info((const char *)vcap.bus_info);
cards[bus_info].push_back(*iter);
}
}
for (card_map::iterator iter = cards.begin();
iter != cards.end(); ++iter) {
VIDEO_DEVICE device;
device.card_name = iter->first;
//get serial number
if(1)
{
device.serial_number = getDeviceSerialNumber((iter->second)[0].c_str());
}
for(int i=0; i<(iter->second).size(); ++i)
{
device.video_names.push_back((iter->second)[i]);
}
device_lists.push_back(device);
}
}
