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spa: v4l2: get the device number of the v4l2 device

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This value can be used in filtering the camera devices in consultation with
libcamera
This commit is contained in:
Ashok Sidipotu 2023-06-06 17:53:17 +05:30 • committed by Wim Taymans
parent 79518d13ae
commit 6cd29aed05
2 changed files with 10 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

8
spa/plugins/v4l2/v4l2-device.c
View file

@ -29,6 +29,7 @@ static const char default_device[] = "/dev/video0";
struct props {
char device[64];
char devnum[32];
char product_id[6];
char vendor_id[6];
int device_fd;
@ -55,11 +56,11 @@ struct impl {
static int emit_info(struct impl *this, bool full)
{
int res;
struct spa_dict_item items[12];
struct spa_dict_item items[13];
uint32_t n_items = 0;
struct spa_device_info info;
struct spa_param_info params[2];
char path[128], version[16], capabilities[16], device_caps[16];
char path[128], version[16], capabilities[16], device_caps[16];
if ((res = spa_v4l2_open(&this->dev, this->props.device)) < 0)
return res;
@ -78,6 +79,7 @@ static int emit_info(struct impl *this, bool full)
if (this->props.vendor_id[0])
ADD_ITEM(SPA_KEY_DEVICE_VENDOR_ID, this->props.vendor_id);
ADD_ITEM(SPA_KEY_API_V4L2_PATH, (char *)this->props.device);
ADD_ITEM(SPA_KEY_DEVICE_DEVIDS, (char *)this->props.devnum);
ADD_ITEM(SPA_KEY_API_V4L2_CAP_DRIVER, (char *)this->dev.cap.driver);
ADD_ITEM(SPA_KEY_API_V4L2_CAP_CARD, (char *)this->dev.cap.card);
ADD_ITEM(SPA_KEY_API_V4L2_CAP_BUS_INFO, (char *)this->dev.cap.bus_info);
@ -233,6 +235,8 @@ impl_init(const struct spa_handle_factory *factory,
if (info && (str = spa_dict_lookup(info, SPA_KEY_API_V4L2_PATH)))
strncpy(this->props.device, str, 63);
if (info && (str = spa_dict_lookup(info, SPA_KEY_DEVICE_DEVIDS)))
strncpy(this->props.devnum, str, 31);
if (info && (str = spa_dict_lookup(info, SPA_KEY_DEVICE_PRODUCT_ID)))
strncpy(this->props.product_id, str, 5);
if (info && (str = spa_dict_lookup(info, SPA_KEY_DEVICE_VENDOR_ID)))

5
spa/plugins/v4l2/v4l2-udev.c
View file

@ -220,8 +220,9 @@ static int emit_object_info(struct impl *this, struct device *device)
uint32_t id = device->id;
struct udev_device *dev = device->dev;
const char *str;
struct spa_dict_item items[20];
struct spa_dict_item items[21];
uint32_t n_items = 0;
char devnum[32];
info = SPA_DEVICE_OBJECT_INFO_INIT();
@ -236,6 +237,8 @@ static int emit_object_info(struct impl *this, struct device *device)
items[n_items++] = SPA_DICT_ITEM_INIT(SPA_KEY_MEDIA_CLASS, "Video/Device");
items[n_items++] = SPA_DICT_ITEM_INIT(SPA_KEY_API_V4L2_PATH, udev_device_get_devnode(dev));
snprintf(devnum, sizeof(devnum), "%" PRId64, (int64_t)udev_device_get_devnum(dev));
items[n_items++] = SPA_DICT_ITEM_INIT(SPA_KEY_DEVICE_DEVIDS, devnum);
if ((str = udev_device_get_property_value(dev, "USEC_INITIALIZED")) && *str)
items[n_items++] = SPA_DICT_ITEM_INIT(SPA_KEY_DEVICE_PLUGGED_USEC, str);