[−]Struct gstreamer::DeviceMonitor

[+] Show declaration

pub struct DeviceMonitor(_, _);

[−]

Applications should create a DeviceMonitor when they want to probe, list and monitor devices of a specific type. The DeviceMonitor will create the appropriate DeviceProvider objects and manage them. It will then post messages on its Bus 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;
  }

Implements

DeviceMonitorExt, GstObjectExt, glib::object::ObjectExt

Methods

`impl DeviceMonitor`[src][−]

`pub fn new() -> DeviceMonitor`[src][−]

Create a new DeviceMonitor

Returns

a new device monitor.

[−]Struct gstreamer::DeviceMonitor

Implements

Methods

impl DeviceMonitor[src][−]

pub fn new() -> DeviceMonitor[src][−]

Returns

Trait Implementations

impl Clone for DeviceMonitor[+]

fn clone(&self) -> DeviceMonitor[−]

fn clone_from(&mut self, source: &Self)1.0.0[src][−]

impl Debug for DeviceMonitor[+]

fn fmt(&self, f: &mut Formatter) -> Result[−]

impl Default for DeviceMonitor[src][+]

fn default() -> Self[src][−]

impl Eq for DeviceMonitor

impl Hash for DeviceMonitor[+]

fn hash<__H: Hasher>(&self, state: &mut __H)[−]

fn hash_slice<H>(data: &[Self], state: &mut H) where H: Hasher, 1.3.0[src][−]

impl IsA<Object> for DeviceMonitor

impl Ord for DeviceMonitor[+]

fn cmp(&self, other: &DeviceMonitor) -> Ordering[−]

[+] Expand attributes#[must_use] fn max(self, other: Self) -> Self1.21.0[src][−]

[+] Expand attributes#[must_use] fn min(self, other: Self) -> Self1.21.0[src][−]

[+] Expand attributes#[must_use] fn clamp(self, min: Self, max: Self) -> Self[src][−]

impl<T: ObjectType> PartialEq<T> for DeviceMonitor[+]

fn eq(&self, other: &T) -> bool[−]

[+] Expand attributes#[must_use] fn ne(&self, other: &Rhs) -> bool1.0.0[src][−]

impl<T: ObjectType> PartialOrd<T> for DeviceMonitor[+]

fn partial_cmp(&self, other: &T) -> Option<Ordering>[−]

[+] Expand attributes#[must_use] fn lt(&self, other: &Rhs) -> bool1.0.0[src][−]

[+] Expand attributes#[must_use] fn le(&self, other: &Rhs) -> bool1.0.0[src][−]

[+] Expand attributes#[must_use] fn gt(&self, other: &Rhs) -> bool1.0.0[src][−]

[+] Expand attributes#[must_use] fn ge(&self, other: &Rhs) -> bool1.0.0[src][−]

impl Send for DeviceMonitor[src]

impl StaticType for DeviceMonitor[+]

fn static_type() -> Type[−]

impl Sync for DeviceMonitor[src]

Auto Trait Implementations

impl RefUnwindSafe for DeviceMonitor

impl Unpin for DeviceMonitor

impl UnwindSafe for DeviceMonitor

Blanket Implementations

impl<T> Any for T where T: 'static + ?Sized, [src][+]

fn type_id(&self) -> TypeId[src][−]

impl<T> Borrow<T> for T where T: ?Sized, [src][+]

fn borrow(&self) -> &T[src][−]

impl<T> BorrowMut<T> for T where T: ?Sized, [src][+]

fn borrow_mut(&mut self) -> &mut T[src][−]

impl<Super, Sub> CanDowncast<Sub> for Super where Sub: IsA<Super>, Super: IsA<Super>, [src]

impl<T> Cast for T where T: ObjectType, [src][+]

fn upcast<T>(self) -> T where Self: IsA<T>, T: ObjectType, [src][−]

fn upcast_ref<T>(&self) -> &T where Self: IsA<T>, T: ObjectType, [src][−]

fn downcast<T>(self) -> Result<T, Self> where Self: CanDowncast<T>, T: ObjectType, [src][−]

fn downcast_ref<T>(&self) -> Option<&T> where Self: CanDowncast<T>, T: ObjectType, [src][−]

fn dynamic_cast<T>(self) -> Result<T, Self> where T: ObjectType, [src][−]

fn dynamic_cast_ref<T>(&self) -> Option<&T> where T: ObjectType, [src][−]

unsafe fn unsafe_cast<T>(self) -> T where T: ObjectType, [src][−]

unsafe fn unsafe_cast_ref<T>(&self) -> &T where T: ObjectType, [src][−]

impl<T> From<T> for T[src][+]

fn from(t: T) -> T[src][−]

impl<T, U> Into<U> for T where U: From<T>, [src][+]

fn into(self) -> U[src][−]

impl<T> ObjectExt for T where T: ObjectType, [src][+]

fn is<U>(&self) -> bool where U: StaticType, [src][−]

fn get_type(&self) -> Type[src]

fn get_object_class(&self) -> &ObjectClass[src]

fn set_property<'a, N>( &self, property_name: N, value: &dyn ToValue) -> Result<(), BoolError> where N: Into<&'a str>, [src]

fn get_property<'a, N>(&self, property_name: N) -> Result<Value, BoolError> where N: Into<&'a str>, [src]

fn block_signal(&self, handler_id: &SignalHandlerId)[src]

fn unblock_signal(&self, handler_id: &SignalHandlerId)[src]

fn stop_signal_emission(&self, signal_name: &str)[src]

fn disconnect(&self, handler_id: SignalHandlerId)[src]

fn connect_notify<F>(&self, name: Option<&str>, f: F) -> SignalHandlerId where F: 'static + Send + Sync + Fn(&T, &ParamSpec), [src]

unsafe fn connect_notify_unsafe<F>( &self, name: Option<&str>, f: F) -> SignalHandlerId where F: Fn(&T, &ParamSpec), [src]

fn notify<'a, N>(&self, property_name: N) where N: Into<&'a str>, [src]

fn notify_by_pspec(&self, pspec: &ParamSpec)[src]

fn has_property<'a, N>( &self, property_name: N, type_: Option<Type>) -> Result<(), BoolError> where N: Into<&'a str>, [src]

fn get_property_type<'a, N>(&self, property_name: N) -> Option<Type> where N: Into<&'a str>, [src]

fn find_property<'a, N>(&self, property_name: N) -> Option<ParamSpec> where N: Into<&'a str>, [src]

fn list_properties(&self) -> Vec<ParamSpec>[src]

`impl DeviceMonitor`[src][−]

`pub fn new() -> DeviceMonitor`[src][−]

`impl Clone for DeviceMonitor`[+]

`fn clone(&self) -> DeviceMonitor`[−]

`fn clone_from(&mut self, source: &Self)`1.0.0[src][−]

`impl Debug for DeviceMonitor`[+]

`fn fmt(&self, f: &mut Formatter) -> Result`[−]

`impl Default for DeviceMonitor`[src][+]

`fn default() -> Self`[src][−]

`impl Eq for DeviceMonitor`

`impl Hash for DeviceMonitor`[+]

`fn hash<H: Hasher>(&self, state: &mut H)`[−]

`fn hash_slice<H>(data: &[Self], state: &mut H) where H: Hasher,` 1.3.0[src][−]

`impl IsA<Object> for DeviceMonitor`

`impl Ord for DeviceMonitor`[+]

`fn cmp(&self, other: &DeviceMonitor) -> Ordering`[−]

`[+] Expand attributes #[must_use] fn max(self, other: Self) -> Self`1.21.0[src][−]

`[+] Expand attributes #[must_use] fn min(self, other: Self) -> Self`1.21.0[src][−]

`[+] Expand attributes #[must_use] fn clamp(self, min: Self, max: Self) -> Self`[src][−]

`impl<T: ObjectType> PartialEq<T> for DeviceMonitor`[+]

`fn eq(&self, other: &T) -> bool`[−]

`[+] Expand attributes #[must_use] fn ne(&self, other: &Rhs) -> bool`1.0.0[src][−]

`impl<T: ObjectType> PartialOrd<T> for DeviceMonitor`[+]

`fn partial_cmp(&self, other: &T) -> Option<Ordering>`[−]

`[+] Expand attributes #[must_use] fn lt(&self, other: &Rhs) -> bool`1.0.0[src][−]

`[+] Expand attributes #[must_use] fn le(&self, other: &Rhs) -> bool`1.0.0[src][−]

`[+] Expand attributes #[must_use] fn gt(&self, other: &Rhs) -> bool`1.0.0[src][−]

`[+] Expand attributes #[must_use] fn ge(&self, other: &Rhs) -> bool`1.0.0[src][−]

`impl Send for DeviceMonitor`[src]

`impl StaticType for DeviceMonitor`[+]

`fn static_type() -> Type`[−]

`impl Sync for DeviceMonitor`[src]

`impl RefUnwindSafe for DeviceMonitor`

`impl Unpin for DeviceMonitor`

`impl UnwindSafe for DeviceMonitor`

`impl<T> Any for T where T: 'static + ?Sized,` [src][+]

`fn type_id(&self) -> TypeId`[src][−]

`impl<T> Borrow<T> for T where T: ?Sized,` [src][+]

`fn borrow(&self) -> &T`[src][−]

`impl<T> BorrowMut<T> for T where T: ?Sized,` [src][+]

`fn borrow_mut(&mut self) -> &mut T`[src][−]

`impl<Super, Sub> CanDowncast<Sub> for Super where Sub: IsA<Super>, Super: IsA<Super>,` [src]

`impl<T> Cast for T where T: ObjectType,` [src][+]

`fn upcast<T>(self) -> T where Self: IsA<T>, T: ObjectType,` [src][−]

`fn upcast_ref<T>(&self) -> &T where Self: IsA<T>, T: ObjectType,` [src][−]

`fn downcast<T>(self) -> Result<T, Self> where Self: CanDowncast<T>, T: ObjectType,` [src][−]

`fn downcast_ref<T>(&self) -> Option<&T> where Self: CanDowncast<T>, T: ObjectType,` [src][−]

`fn dynamic_cast<T>(self) -> Result<T, Self> where T: ObjectType,` [src][−]

`fn dynamic_cast_ref<T>(&self) -> Option<&T> where T: ObjectType,` [src][−]

`unsafe fn unsafe_cast<T>(self) -> T where T: ObjectType,` [src][−]

`unsafe fn unsafe_cast_ref<T>(&self) -> &T where T: ObjectType,` [src][−]

`impl<T> From<T> for T`[src][+]

`fn from(t: T) -> T`[src][−]

`impl<T, U> Into<U> for T where U: From<T>,` [src][+]

`fn into(self) -> U`[src][−]

`impl<T> ObjectExt for T where T: ObjectType,` [src][+]

`fn is<U>(&self) -> bool where U: StaticType,` [src][−]

`fn get_type(&self) -> Type`[src]

`fn get_object_class(&self) -> &ObjectClass`[src]

`fn set_property<'a, N>( &self, property_name: N, value: &dyn ToValue ) -> Result<(), BoolError> where N: Into<&'a str>,` [src]

`fn get_property<'a, N>(&self, property_name: N) -> Result<Value, BoolError> where N: Into<&'a str>,` [src]

`fn block_signal(&self, handler_id: &SignalHandlerId)`[src]

`fn unblock_signal(&self, handler_id: &SignalHandlerId)`[src]

`fn stop_signal_emission(&self, signal_name: &str)`[src]

`fn disconnect(&self, handler_id: SignalHandlerId)`[src]

`fn connect_notify<F>(&self, name: Option<&str>, f: F) -> SignalHandlerId where F: 'static + Send + Sync + Fn(&T, &ParamSpec),` [src]

`unsafe fn connect_notify_unsafe<F>( &self, name: Option<&str>, f: F ) -> SignalHandlerId where F: Fn(&T, &ParamSpec),` [src]

`fn notify<'a, N>(&self, property_name: N) where N: Into<&'a str>,` [src]

`fn notify_by_pspec(&self, pspec: &ParamSpec)`[src]

`fn has_property<'a, N>( &self, property_name: N, type_: Option<Type> ) -> Result<(), BoolError> where N: Into<&'a str>,` [src]

`fn get_property_type<'a, N>(&self, property_name: N) -> Option<Type> where N: Into<&'a str>,` [src]

`fn find_property<'a, N>(&self, property_name: N) -> Option<ParamSpec> where N: Into<&'a str>,` [src]

`fn list_properties(&self) -> Vec<ParamSpec>`[src]

`fn connect<'a, N, F>( &self, signal_name: N, after: bool, callback: F ) -> Result<SignalHandlerId, BoolError> where F: Fn(&[Value]) -> Option<Value> + Send + Sync + 'static, N: Into<&'a str>,` [src]

`fn connect_local<'a, N, F>( &self, signal_name: N, after: bool, callback: F ) -> Result<SignalHandlerId, BoolError> where F: Fn(&[Value]) -> Option<Value> + 'static, N: Into<&'a str>,` [src]

`unsafe fn connect_unsafe<'a, N, F>( &self, signal_name: N, after: bool, callback: F ) -> Result<SignalHandlerId, BoolError> where F: Fn(&[Value]) -> Option<Value>, N: Into<&'a str>,` [src]

`fn emit<'a, N>( &self, signal_name: N, args: &[&dyn ToValue] ) -> Result<Option<Value>, BoolError> where N: Into<&'a str>,` [src]

`fn downgrade(&self) -> WeakRef<T>`[src]

`fn bind_property<'a, O, N, M>( &'a self, source_property: N, target: &'a O, target_property: M ) -> BindingBuilder<'a> where M: Into<&'a str>, N: Into<&'a str>, O: ObjectType,` [src]

`fn ref_count(&self) -> u32`[src]