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SDL_VideoCapture: allow add/remove device at runtime on linux

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Sylvain
2023-11-27 19:35:45 +01:00
committed by Ryan C. Gordon
parent f0e47f8ee0
commit 6bb40f1d8d
9 changed files with 411 additions and 49 deletions
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10
src/core/linux/SDL_udev.c
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@@ -139,6 +139,7 @@ int SDL_UDEV_Init(void)
_this->syms.udev_monitor_filter_add_match_subsystem_devtype(_this->udev_mon, "input", NULL);
_this->syms.udev_monitor_filter_add_match_subsystem_devtype(_this->udev_mon, "sound", NULL);
_this->syms.udev_monitor_filter_add_match_subsystem_devtype(_this->udev_mon, "video4linux", NULL);
_this->syms.udev_monitor_enable_receiving(_this->udev_mon);
/* Do an initial scan of existing devices */
@@ -200,6 +201,7 @@ int SDL_UDEV_Scan(void)
_this->syms.udev_enumerate_add_match_subsystem(enumerate, "input");
_this->syms.udev_enumerate_add_match_subsystem(enumerate, "sound");
_this->syms.udev_enumerate_add_match_subsystem(enumerate, "video4linux");
_this->syms.udev_enumerate_scan_devices(enumerate);
devs = _this->syms.udev_enumerate_get_list_entry(enumerate);
@@ -405,8 +407,16 @@ static void device_event(SDL_UDEV_deviceevent type, struct udev_device *dev)
}
subsystem = _this->syms.udev_device_get_subsystem(dev);
if (SDL_strcmp(subsystem, "sound") == 0) {
devclass = SDL_UDEV_DEVICE_SOUND;
} else if (SDL_strcmp(subsystem, "video4linux") == 0) {
devclass = SDL_UDEV_DEVICE_VIDEO_CAPTURE;
val = _this->syms.udev_device_get_property_value(dev, "ID_V4L_CAPABILITIES");
if (!val || !SDL_strcasestr(val, "capture")) {
return;
}
} else if (SDL_strcmp(subsystem, "input") == 0) {
/* udev rules reference: http://cgit.freedesktop.org/systemd/systemd/tree/src/udev/udev-builtin-input_id.c */