Package org.freedesktop.gstreamer.gst

Class DeviceMonitor

java.lang.Object
io.github.jwharm.javagi.base.ProxyInstance
org.gnome.gobject.TypeInstance
org.gnome.gobject.GObject
org.gnome.gobject.InitiallyUnowned
org.freedesktop.gstreamer.gst.GstObject
org.freedesktop.gstreamer.gst.DeviceMonitor
All Implemented Interfaces:
Proxy
@Generated("io.github.jwharm.JavaGI") public class DeviceMonitor extends GstObject
Applications should create a GstDeviceMonitor when they want to probe, list and monitor devices of a specific type. The GstDeviceMonitor will create the appropriate GstDeviceProvider objects and manage them. It will then post messages on its GstBus for devices that have been added and removed.

The device monitor will monitor all devices matching the filters that the application has set.

The basic use pattern of a device monitor is as follows: 


   static gboolean
   my_bus_func (GstBus * bus, GstMessage * message, gpointer user_data)
   {
      GstDevice *device;
      gchar *name;

      switch (GST_MESSAGE_TYPE (message)) {
        case GST_MESSAGE_DEVICE_ADDED:
          gst_message_parse_device_added (message, &device);
          name = gst_device_get_display_name (device);
          g_print("Device added: %s\\n", name);
          g_free (name);
          gst_object_unref (device);
          break;
        case GST_MESSAGE_DEVICE_REMOVED:
          gst_message_parse_device_removed (message, &device);
          name = gst_device_get_display_name (device);
          g_print("Device removed: %s\\n", name);
          g_free (name);
          gst_object_unref (device);
          break;
        default:
          break;
      }

      return G_SOURCE_CONTINUE;
   }

   GstDeviceMonitor *
   setup_raw_video_source_device_monitor (void) {
      GstDeviceMonitor *monitor;
      GstBus *bus;
      GstCaps *caps;

      monitor = gst_device_monitor_new ();

      bus = gst_device_monitor_get_bus (monitor);
      gst_bus_add_watch (bus, my_bus_func, NULL);
      gst_object_unref (bus);

      caps = gst_caps_new_empty_simple ("video/x-raw");
      gst_device_monitor_add_filter (monitor, "Video/Source", caps);
      gst_caps_unref (caps);

      gst_device_monitor_start (monitor);

      return monitor;
   }