device-monitor: Stop createing duplicated CameraDevices

Devices detected in `cheese_camera_device_monitor_coldplug()` may get
duplicated, as Gstreamer will emit `GST_MESSAGE_DEVICE_ADDED` for them.

While this issue could be fixed by reorganizing the initialization code,
let's go with a simple and robust solution and check if a
`CheeseCameraDevice` using the `GstDevice` is already present.

1 files changed, 10 insertions, 1 deletions

diff --git a/libcheese/cheese-camera-device-monitor.c b/libcheese/cheese-camera-device-monitor.c
index 87c48ccb..a2c3565c 100644
--- a/libcheese/cheese-camera-device-monitor.c
+++ b/libcheese/cheese-camera-device-monitor.c
@@ -114,7 +114,16 @@ static void
 cheese_camera_device_monitor_added (CheeseCameraDeviceMonitor *monitor,
                                     GstDevice                 *device)
 {
-  CheeseCameraDevice *newdev = cheese_camera_device_monitor_set_up_device (device);
+  CheeseCameraDevice *olddev;
+  CheeseCameraDevice *newdev;
+
+  olddev = g_object_get_data (G_OBJECT (device), "cheese-camera-device");
+  if (olddev) {
+      GST_DEBUG ("Ignoring duplicate device %" GST_PTR_FORMAT, device);
+      return;
+  }
+
+  newdev = cheese_camera_device_monitor_set_up_device (device);
   /* Ignore non-video devices, GNOME bug #677544. */
   if (newdev) {
     g_object_set_data (G_OBJECT (device), "cheese-camera-device", newdev);