[−][src]Struct gstreamer::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
, DeviceMonitorExtManual
Implementations
impl DeviceMonitor
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pub fn new() -> DeviceMonitor
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Trait Implementations
impl Clone for DeviceMonitor
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fn clone(&self) -> DeviceMonitor
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fn clone_from(&mut self, source: &Self)
1.0.0[src]
impl Debug for DeviceMonitor
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impl Default for DeviceMonitor
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impl Eq for DeviceMonitor
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impl Hash for DeviceMonitor
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fn hash<__H: Hasher>(&self, state: &mut __H)
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fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,
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H: Hasher,
impl IsA<Object> for DeviceMonitor
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impl Ord for DeviceMonitor
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fn cmp(&self, other: &DeviceMonitor) -> Ordering
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#[must_use]fn max(self, other: Self) -> Self
1.21.0[src]
#[must_use]fn min(self, other: Self) -> Self
1.21.0[src]
#[must_use]fn clamp(self, min: Self, max: Self) -> Self
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impl<T: ObjectType> PartialEq<T> for DeviceMonitor
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impl<T: ObjectType> PartialOrd<T> for DeviceMonitor
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fn partial_cmp(&self, other: &T) -> Option<Ordering>
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#[must_use]fn lt(&self, other: &Rhs) -> bool
1.0.0[src]
#[must_use]fn le(&self, other: &Rhs) -> bool
1.0.0[src]
#[must_use]fn gt(&self, other: &Rhs) -> bool
1.0.0[src]
#[must_use]fn ge(&self, other: &Rhs) -> bool
1.0.0[src]
impl Send for DeviceMonitor
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impl StaticType for DeviceMonitor
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fn static_type() -> Type
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impl Sync for DeviceMonitor
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Auto Trait Implementations
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<Super, Sub> CanDowncast<Sub> for Super where
Sub: IsA<Super>,
Super: IsA<Super>,
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Sub: IsA<Super>,
Super: IsA<Super>,
impl<T> Cast for T where
T: ObjectType,
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T: ObjectType,
fn upcast<T>(self) -> T where
Self: IsA<T>,
T: ObjectType,
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Self: IsA<T>,
T: ObjectType,
fn upcast_ref<T>(&self) -> &T where
Self: IsA<T>,
T: ObjectType,
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Self: IsA<T>,
T: ObjectType,
fn downcast<T>(self) -> Result<T, Self> where
Self: CanDowncast<T>,
T: ObjectType,
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Self: CanDowncast<T>,
T: ObjectType,
fn downcast_ref<T>(&self) -> Option<&T> where
Self: CanDowncast<T>,
T: ObjectType,
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Self: CanDowncast<T>,
T: ObjectType,
fn dynamic_cast<T>(self) -> Result<T, Self> where
T: ObjectType,
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T: ObjectType,
fn dynamic_cast_ref<T>(&self) -> Option<&T> where
T: ObjectType,
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T: ObjectType,
unsafe fn unsafe_cast<T>(self) -> T where
T: ObjectType,
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T: ObjectType,
unsafe fn unsafe_cast_ref<T>(&self) -> &T where
T: ObjectType,
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T: ObjectType,
impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T> ObjectExt for T where
T: ObjectType,
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T: ObjectType,
fn is<U>(&self) -> bool where
U: StaticType,
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U: StaticType,
fn get_type(&self) -> Type
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fn get_object_class(&self) -> &ObjectClass
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fn set_properties(
&self,
property_values: &[(&str, &dyn ToValue)]
) -> Result<(), BoolError>
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&self,
property_values: &[(&str, &dyn ToValue)]
) -> Result<(), BoolError>
fn set_property<'a, N>(
&self,
property_name: N,
value: &dyn ToValue
) -> Result<(), BoolError> where
N: Into<&'a str>,
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&self,
property_name: N,
value: &dyn ToValue
) -> Result<(), BoolError> where
N: Into<&'a str>,
fn get_property<'a, N>(&self, property_name: N) -> Result<Value, BoolError> where
N: Into<&'a str>,
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N: Into<&'a str>,
unsafe fn set_qdata<QD>(&self, key: Quark, value: QD) where
QD: 'static,
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QD: 'static,
unsafe fn get_qdata<QD>(&self, key: Quark) -> Option<&QD> where
QD: 'static,
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QD: 'static,
unsafe fn steal_qdata<QD>(&self, key: Quark) -> Option<QD> where
QD: 'static,
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QD: 'static,
unsafe fn set_data<QD>(&self, key: &str, value: QD) where
QD: 'static,
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QD: 'static,
unsafe fn get_data<QD>(&self, key: &str) -> Option<&QD> where
QD: 'static,
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QD: 'static,
unsafe fn steal_data<QD>(&self, key: &str) -> Option<QD> where
QD: 'static,
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QD: 'static,
fn block_signal(&self, handler_id: &SignalHandlerId)
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fn unblock_signal(&self, handler_id: &SignalHandlerId)
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fn stop_signal_emission(&self, signal_name: &str)
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fn disconnect(&self, handler_id: SignalHandlerId)
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fn connect_notify<F>(&self, name: Option<&str>, f: F) -> SignalHandlerId where
F: 'static + Send + Sync + Fn(&T, &ParamSpec),
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F: 'static + Send + Sync + Fn(&T, &ParamSpec),
unsafe fn connect_notify_unsafe<F>(
&self,
name: Option<&str>,
f: F
) -> SignalHandlerId where
F: Fn(&T, &ParamSpec),
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&self,
name: Option<&str>,
f: F
) -> SignalHandlerId where
F: Fn(&T, &ParamSpec),
fn notify<'a, N>(&self, property_name: N) where
N: Into<&'a str>,
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N: Into<&'a str>,
fn notify_by_pspec(&self, pspec: &ParamSpec)
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fn has_property<'a, N>(&self, property_name: N, type_: Option<Type>) -> bool where
N: Into<&'a str>,
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N: Into<&'a str>,
fn get_property_type<'a, N>(&self, property_name: N) -> Option<Type> where
N: Into<&'a str>,
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N: Into<&'a str>,
fn find_property<'a, N>(&self, property_name: N) -> Option<ParamSpec> where
N: Into<&'a str>,
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N: Into<&'a str>,
fn list_properties(&self) -> Vec<ParamSpec>
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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>,
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&self,
signal_name: N,
after: bool,
callback: F
) -> Result<SignalHandlerId, BoolError> where
F: Fn(&[Value]) -> Option<Value> + Send + Sync + 'static,
N: Into<&'a str>,
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>,
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&self,
signal_name: N,
after: bool,
callback: F
) -> Result<SignalHandlerId, BoolError> where
F: Fn(&[Value]) -> Option<Value> + 'static,
N: Into<&'a str>,
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>,
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&self,
signal_name: N,
after: bool,
callback: F
) -> Result<SignalHandlerId, BoolError> where
F: Fn(&[Value]) -> Option<Value>,
N: Into<&'a str>,
fn emit<'a, N>(
&self,
signal_name: N,
args: &[&dyn ToValue]
) -> Result<Option<Value>, BoolError> where
N: Into<&'a str>,
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&self,
signal_name: N,
args: &[&dyn ToValue]
) -> Result<Option<Value>, BoolError> where
N: Into<&'a str>,
fn downgrade(&self) -> WeakRef<T>
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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,
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&'a self,
source_property: N,
target: &'a O,
target_property: M
) -> BindingBuilder<'a> where
M: Into<&'a str>,
N: Into<&'a str>,
O: ObjectType,
fn ref_count(&self) -> u32
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impl<'a, T> ToGlibContainerFromSlice<'a, *const GList> for T where
T: GlibPtrDefault + ToGlibPtr<'a, <T as GlibPtrDefault>::GlibType>,
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T: GlibPtrDefault + ToGlibPtr<'a, <T as GlibPtrDefault>::GlibType>,
type Storage = (Option<List>, Vec<Stash<'a, <T as GlibPtrDefault>::GlibType, T>>)
fn to_glib_none_from_slice(
t: &'a [T]
) -> (*const GList, <T as ToGlibContainerFromSlice<'a, *const GList>>::Storage)
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t: &'a [T]
) -> (*const GList, <T as ToGlibContainerFromSlice<'a, *const GList>>::Storage)
fn to_glib_container_from_slice(
_t: &'a [T]
) -> (*const GList, <T as ToGlibContainerFromSlice<'a, *const GList>>::Storage)
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_t: &'a [T]
) -> (*const GList, <T as ToGlibContainerFromSlice<'a, *const GList>>::Storage)
fn to_glib_full_from_slice(_t: &[T]) -> *const GList
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impl<'a, T> ToGlibContainerFromSlice<'a, *const GPtrArray> for T where
T: GlibPtrDefault + ToGlibPtr<'a, <T as GlibPtrDefault>::GlibType>,
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T: GlibPtrDefault + ToGlibPtr<'a, <T as GlibPtrDefault>::GlibType>,
type Storage = (Option<PtrArray>, Vec<Stash<'a, <T as GlibPtrDefault>::GlibType, T>>)
fn to_glib_none_from_slice(
t: &'a [T]
) -> (*const GPtrArray, <T as ToGlibContainerFromSlice<'a, *const GPtrArray>>::Storage)
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t: &'a [T]
) -> (*const GPtrArray, <T as ToGlibContainerFromSlice<'a, *const GPtrArray>>::Storage)
fn to_glib_container_from_slice(
_t: &'a [T]
) -> (*const GPtrArray, <T as ToGlibContainerFromSlice<'a, *const GPtrArray>>::Storage)
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_t: &'a [T]
) -> (*const GPtrArray, <T as ToGlibContainerFromSlice<'a, *const GPtrArray>>::Storage)
fn to_glib_full_from_slice(_t: &[T]) -> *const GPtrArray
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impl<'a, T> ToGlibContainerFromSlice<'a, *mut GArray> for T where
T: GlibPtrDefault + ToGlibPtr<'a, <T as GlibPtrDefault>::GlibType>,
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T: GlibPtrDefault + ToGlibPtr<'a, <T as GlibPtrDefault>::GlibType>,
type Storage = (Option<Array>, Vec<Stash<'a, <T as GlibPtrDefault>::GlibType, T>>)
fn to_glib_none_from_slice(
t: &'a [T]
) -> (*mut GArray, <T as ToGlibContainerFromSlice<'a, *mut GArray>>::Storage)
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t: &'a [T]
) -> (*mut GArray, <T as ToGlibContainerFromSlice<'a, *mut GArray>>::Storage)
fn to_glib_container_from_slice(
t: &'a [T]
) -> (*mut GArray, <T as ToGlibContainerFromSlice<'a, *mut GArray>>::Storage)
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t: &'a [T]
) -> (*mut GArray, <T as ToGlibContainerFromSlice<'a, *mut GArray>>::Storage)
fn to_glib_full_from_slice(t: &[T]) -> *mut GArray
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impl<'a, T> ToGlibContainerFromSlice<'a, *mut GList> for T where
T: GlibPtrDefault + ToGlibPtr<'a, <T as GlibPtrDefault>::GlibType>,
[src]
T: GlibPtrDefault + ToGlibPtr<'a, <T as GlibPtrDefault>::GlibType>,
type Storage = (Option<List>, Vec<Stash<'a, <T as GlibPtrDefault>::GlibType, T>>)
fn to_glib_none_from_slice(
t: &'a [T]
) -> (*mut GList, <T as ToGlibContainerFromSlice<'a, *mut GList>>::Storage)
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t: &'a [T]
) -> (*mut GList, <T as ToGlibContainerFromSlice<'a, *mut GList>>::Storage)
fn to_glib_container_from_slice(
t: &'a [T]
) -> (*mut GList, <T as ToGlibContainerFromSlice<'a, *mut GList>>::Storage)
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t: &'a [T]
) -> (*mut GList, <T as ToGlibContainerFromSlice<'a, *mut GList>>::Storage)
fn to_glib_full_from_slice(t: &[T]) -> *mut GList
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impl<'a, T> ToGlibContainerFromSlice<'a, *mut GPtrArray> for T where
T: GlibPtrDefault + ToGlibPtr<'a, <T as GlibPtrDefault>::GlibType>,
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T: GlibPtrDefault + ToGlibPtr<'a, <T as GlibPtrDefault>::GlibType>,
type Storage = (Option<PtrArray>, Vec<Stash<'a, <T as GlibPtrDefault>::GlibType, T>>)
fn to_glib_none_from_slice(
t: &'a [T]
) -> (*mut GPtrArray, <T as ToGlibContainerFromSlice<'a, *mut GPtrArray>>::Storage)
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t: &'a [T]
) -> (*mut GPtrArray, <T as ToGlibContainerFromSlice<'a, *mut GPtrArray>>::Storage)
fn to_glib_container_from_slice(
t: &'a [T]
) -> (*mut GPtrArray, <T as ToGlibContainerFromSlice<'a, *mut GPtrArray>>::Storage)
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t: &'a [T]
) -> (*mut GPtrArray, <T as ToGlibContainerFromSlice<'a, *mut GPtrArray>>::Storage)
fn to_glib_full_from_slice(t: &[T]) -> *mut GPtrArray
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impl<T> ToOwned for T where
T: Clone,
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T: Clone,
type Owned = T
The resulting type after obtaining ownership.
fn to_owned(&self) -> T
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fn clone_into(&self, target: &mut T)
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impl<T> ToSendValue for T where
T: ToValue + SetValue + Send + ?Sized,
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T: ToValue + SetValue + Send + ?Sized,
fn to_send_value(&self) -> SendValue
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impl<T> ToValue for T where
T: SetValue + ?Sized,
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T: SetValue + ?Sized,
impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,