machine: add video peripheral API request

Signed-off-by: Eric Callahan <arksine.code@gmail.com>

moonraker/components/machine.py

@@ -21,7 +21,7 @@ import tempfile
 import getpass
 import configparser
 from ..confighelper import FileSourceWrapper
-from ..utils import source_info, cansocket, sysfs_devs
+from ..utils import source_info, cansocket, sysfs_devs, load_system_module
 from ..utils import json_wrapper as jsonw
 from ..common import RequestType
 
@@ -167,6 +167,9 @@ class Machine:
         self.server.register_endpoint(
             "/machine/peripherals/canbus", RequestType.GET, self._handle_can_query
         )
+        self.server.register_endpoint(
+            "/machine/peripherals/video", RequestType.GET, self._handle_video_request
+        )
 
         self.server.register_notification("machine:service_state_changed")
         self.server.register_notification("machine:sudo_alert")
@@ -186,6 +189,7 @@ class Machine:
             iwgetbin = "iwgetid"
         self.iwgetid_cmd = shell_cmd.build_shell_command(iwgetbin)
         self.init_evt = asyncio.Event()
+        self.libcam = self._try_import_libcamera()
 
     def _init_allowed_services(self) -> None:
         app_args = self.server.get_app_args()
@@ -222,6 +226,23 @@ class Machine:
             sys_info_msg += f"\n  {svc}"
         self.server.add_log_rollover_item('system_info', sys_info_msg, log=log)
 
+    def _try_import_libcamera(self) -> Any:
+        try:
+            libcam = load_system_module("libcamera")
+            cmgr = libcam.CameraManager.singleton()
+            self.server.add_log_rollover_item(
+                "libcamera",
+                f"Found libcamera Python module, version: {cmgr.version}"
+            )
+            return libcam
+        except Exception:
+            if self.server.is_verbose_enabled():
+                logging.exception("Failed to import libcamera")
+            self.server.add_log_rollover_item(
+                "libcamera", "Module libcamera unavailble, import failed"
+            )
+            return None
+
     @property
     def public_ip(self) -> str:
         return self._public_ip
@@ -433,6 +454,9 @@ class Machine:
             "can_uuids": await self.query_can_uuids(interface)
         }
 
+    async def _handle_video_request(self, web_request: WebRequest) -> Dict[str, Any]:
+        return await self.detect_video_devices()
+
     def get_system_info(self) -> Dict[str, Any]:
         return self.system_info
 
@@ -879,6 +903,41 @@ class Machine:
             cansock.close()
         return uuids
 
+    async def detect_video_devices(self) -> Dict[str, List[Dict[str, Any]]]:
+        async with self.periph_lock:
+            eventloop = self.server.get_event_loop()
+            v4l2_devs = await eventloop.run_in_thread(sysfs_devs.find_video_devices)
+            libcam_devs = await eventloop.run_in_thread(self.get_libcamera_devices)
+        return {
+            "v4l2_devices": v4l2_devs,
+            "libcamera_devices": libcam_devs
+        }
+
+    def get_libcamera_devices(self) -> List[Dict[str, Any]]:
+        libcam = self.libcam
+        libcam_devs: List[Dict[str, Any]] = []
+        if libcam is not None:
+            cm = libcam.CameraManager.singleton()
+            for cam in cm.cameras:
+                device: Dict[str, Any] = {"libcamera_id": cam.id}
+                props_by_name = {cid.name: val for cid, val in cam.properties.items()}
+                device["model"] = props_by_name.get("Model")
+                modes: List[Dict[str, Any]] = []
+                cam_config = cam.generate_configuration([libcam.StreamRole.Raw])
+                for stream_cfg in cam_config:
+                    formats = stream_cfg.formats
+                    for pix_fmt in formats.pixel_formats:
+                        cur_mode: Dict[str, Any] = {"format": str(pix_fmt)}
+                        resolutions: List[str] = []
+                        for size in formats.sizes(pix_fmt):
+                            resolutions.append(str(size))
+                        cur_mode["resolutions"] = resolutions
+                        modes.append(cur_mode)
+                device["modes"] = modes
+                libcam_devs.append(device)
+        return libcam_devs
+
+
 class BaseProvider:
     def __init__(self, config: ConfigHelper) -> None:
         self.server = config.get_server()

moonraker/utils/__init__.py

@@ -40,6 +40,7 @@ if TYPE_CHECKING:
 
 SYS_MOD_PATHS = glob.glob("/usr/lib/python3*/dist-packages")
 SYS_MOD_PATHS += glob.glob("/usr/lib/python3*/site-packages")
+SYS_MOD_PATHS += glob.glob("/usr/lib/*-linux-gnu/python3*/site-packages")
 IPAddress = Union[ipaddress.IPv4Address, ipaddress.IPv6Address]
 
 class ServerError(Exception):