GstElement
Base class for all pipeline elements
GstElement is the base class needed to construct an element that can be
used in a GST pipeline. As such, it is not a functional entity, and
cannot do anything when placed in a pipeline.
All GstElements have a list containing the #GstPad structure for all their
inputs and outputs. These can be added with gst_element_add_pad() or
gst_element_add_ghost_pad(), and retrieved by name with
gst_element_get_pad(), or in a list form by gst_element_get_pad_list().
gst_element_connect() is a convenience function provided to make it
simpler to connect pads of two elements together.
#GstElementFactory
This enum defines the standard states an element may be in. You will normally
use gst_element_set_state() to change the state of an element.
@GST_STATE_VOID_PENDING:
@GST_STATE_NULL: Reset the state of an element.
@GST_STATE_READY: will make the element ready to start processing data. some
elements might have a non trivial way to initialize themselves.
@GST_STATE_PAUSED: means there really is data flowing temporary stops the data flow.
@GST_STATE_PLAYING: means there really is data flowing through the graph.
This enum defines the standard return values that an element
can return after a state change.
@GST_STATE_FAILURE: the element could not perform the state change
@GST_STATE_SUCCESS: the element successfully changed its state
@GST_STATE_ASYNC: the element will asynchronously change its state as soon as possible
This macro returns the current state of the element.
@obj: Element to return state for.
This macro returns the currently pending state of the element.
@obj: Element to return the pending state for.
Returns the state transition this object is going through.
@obj: the Element to return the state transition for
The Element is going from the NULL state to the READY state.
The Element is going from the READY state to the PAUSED state.
The Element is going from the PAUSED state to the READY state.
The Element is going from the PLAYING state to the PAUSED state.
The Element is going from the PAUSED state to the PLAYING state.
The Element is going from the READY state to the NULL state.
This enum defines the standard flags that an element may have.
@GST_ELEMENT_COMPLEX:
@GST_ELEMENT_DECOUPLED:
@GST_ELEMENT_THREAD_SUGGESTED:
@GST_ELEMENT_NO_SEEK:
@GST_ELEMENT_NO_ENTRY:
@GST_ELEMENT_NEW_LOOPFUNC:
@GST_ELEMENT_COTHREAD_STOPPING:
@GST_ELEMENT_USE_COTHREAD:
@GST_ELEMENT_EOS:
@GST_ELEMENT_FLAG_LAST:
Queries whether the Element should be placed in a thread.
@obj: The element to query
Queries whether the cothread holding this element needs to be stopped.
@obj: The element to query
Query wether this element is in the End Of Stream state.
@obj: The element to query
Get the parent object of this element.
@obj: The element to query
Get the name of this element.
@obj: The element to query
Get the pads of this elements.
@obj: The element to query
Get the scheduler of this element.
@obj: The element to query
Get the manager of this element.
@obj: The element to query
This function type is used to specify a loop function for the element. It
is passed the element in question, and is expect to return only in error
circumstances.
@element: The element in question.
@klass:
@templ:
@element:
Destroy the element. This is potentially dangerous, use gst_object_unref
instead.
@element: the element to destroy
@element:
@loop:
@element:
@name:
@element:
@Returns:
@element:
@Returns:
@element:
@sched:
@element:
@parent:
@element:
@Returns:
@element:
@pad:
@element:
@pad:
@element:
@name:
@Returns: GList of pads
@element:
@Returns:
@element:
@Returns:
@element:
@name:
@Returns:
@element:
@pad:
@name:
@element:
@pad:
@element:
@templ:
@Returns:
@element:
@name:
@Returns:
@src:
@srcpadname:
@dest:
@destpadname:
@src:
@srcpadname:
@dest:
@destpadname:
@element:
@state:
@Returns:
@element:
@Returns:
@elem:
@state:
@Returns:
@element:
@error:
@element:
@Returns:
@element:
@self:
@parent:
@Returns:
Is trigered whenever the state of an element changes
@gstelement: the object which received the signal.
@arg1: the new state of the object
Is trigered whenever a new pad is added to an element
@gstelement: the object which received the signal.
@arg1: the new pad that was added
@gstelement: the object which received the signal.
@arg1: The pad that was removed.
Is trigered whenever a new ghost pad is added to an element
@gstelement: the object which received the signal.
@arg1: the new ghost pad that was added
@gstelement: the object which received the signal.
@arg1: The ghost pad that was removed.
Is trigered whenever an error occured
@gstelement: the object which received the signal.
@arg1: the error message
@gstelement: the object which received the signal.