gst.device_monitor

Module for [DeviceMonitor] class

class DeviceMonitor DeviceMonitorGidBuilder DeviceMonitorGidBuilderImpl

Types 3

classDeviceMonitor : gst.object.ObjectWrap

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;
}

Methods

GType _getGType() static nothrow

GType _gType() @property nothrow

DeviceMonitor self() nothrowReturns `this`, for use in `with` statements.

DeviceMonitorGidBuilder builder() static nothrowGet builder for [gst.device_monitor.DeviceMonitor] Returns: New builder object

bool showAll() @property nothrow

void showAll(bool propval) @property nothrow

uint addFilter(string classes = null, gst.caps.Caps caps = null) nothrowAdds a filter for which #GstDevice will be monitored, any device that matches all these classes and the #GstCaps will be returned.

gst.bus.Bus getBus() nothrowGets the #GstBus of this #GstDeviceMonitor Returns: a #GstBus

gst.device.Device[] getDevices() nothrowGets a list of devices from all of the relevant monitors. This may actually probe the hardware if the monitor is not currently started. Returns: a #GList of #GstDevice

string[] getProviders() nothrowGet a list of the currently selected device provider factories.

bool getShowAllDevices() nothrowGet if monitor is currently showing all devices, even those from hidden providers. Returns: true when all devices will be shown.

bool removeFilter(uint filterId) nothrowRemoves a filter from the #GstDeviceMonitor using the id that was returned by [gst.device_monitor.DeviceMonitor.addFilter].

void setShowAllDevices(bool showAll) nothrowSet if all devices should be visible, even those devices from hidden providers. Setting show_all to true might show some devices multiple times.

bool start() nothrowStarts monitoring the devices, one this has succeeded, the [gst.types.MessageType.DeviceAdded] and [gst.types.MessageType.DeviceRemoved] messages will be emitted on the bus when the list of devices...

void stop() nothrowStops monitoring the devices.

Constructors

this(void * ptr, Flag!"Take" take)

this()Create a new #GstDeviceMonitor Returns: a new device monitor.

classDeviceMonitorGidBuilderImpl(T) : gst.object.ObjectWrapGidBuilderImpl!T

Fluent builder implementation template for gst.device_monitor.DeviceMonitor

Methods

T showAll(bool propval) nothrow

classDeviceMonitorGidBuilder : DeviceMonitorGidBuilderImpl!DeviceMonitorGidBuilder

Fluent builder for gst.device_monitor.DeviceMonitor

Methods

DeviceMonitor build() nothrowCreate object from builder. Returns: New object