mirrors/SDL
1
0
Fork 0
mirror of https://github.com/libsdl-org/SDL.git synced 2026-08-26 08:31:39 +00:00
Code Issues Packages Projects Releases Wiki Activity

camera: Detect exclusive_caps v4l2loopback devices (#16116)

Browse Source 
(cherry picked from commit 355d1ac848)
This commit is contained in:
capitalistspz
2026-08-05 14:32:57 +00:00
committed by Sam Lantinga
parent 095ac35986
commit 0837c1584c
1 changed files with 13 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
src/core/linux/SDL_udev.c
View File

@@ -464,6 +464,7 @@ static int device_class(struct udev_device *dev)
{
const char *subsystem;
const char *val = NULL;
const char *attr = NULL;
int devclass = 0;
subsystem = _this->syms.udev_device_get_subsystem(dev);
@@ -475,8 +476,18 @@ static int device_class(struct udev_device *dev)
devclass = SDL_UDEV_DEVICE_SOUND;
} else if (SDL_strcmp(subsystem, "video4linux") == 0) {
val = _this->syms.udev_device_get_property_value(dev, "ID_V4L_CAPABILITIES");
if (val && SDL_strcasestr(val, "capture")) {
devclass = SDL_UDEV_DEVICE_VIDEO_CAPTURE;
if (val) {
if (SDL_strcasestr(val, "capture")) {
devclass = SDL_UDEV_DEVICE_VIDEO_CAPTURE;
}
// v4l2loopback may report output caps before reporting capture caps
// and ID_V4L_CAPABILITIES is never updated
else if (SDL_strcasestr(val, "video_output")) {
attr = _this->syms.udev_device_get_sysattr_value(dev, "state");
if (attr && SDL_strcmp(attr, "capture") == 0) {
devclass = SDL_UDEV_DEVICE_VIDEO_CAPTURE;
}
}
}
} else if (SDL_strcmp(subsystem, "input") == 0) {
// udev rules reference: http://cgit.freedesktop.org/systemd/systemd/tree/src/udev/udev-builtin-input_id.c