org.freedesktop.gstreamer.message

Class Message

java.lang.Object

org.freedesktop.gstreamer.glib.NativeObject

org.freedesktop.gstreamer.glib.RefCountedObject

org.freedesktop.gstreamer.MiniObject

org.freedesktop.gstreamer.message.Message

All Implemented Interfaces:

AutoCloseable

Direct Known Subclasses:

BufferingMessage, DurationChangedMessage, EOSMessage, ErrorMessage, InfoMessage, LatencyMessage, NeedContextMessage, SegmentDoneMessage, StateChangedMessage, TagMessage, WarningMessage

public class Message
extends MiniObject

Lightweight objects to signal the occurrence of pipeline events.

See upstream documentation at https://gstreamer.freedesktop.org/data/doc/gstreamer/stable/gstreamer/html/GstMessage.html

Messages are implemented as a subclass of MiniObject with a generic Structure as the content. This allows for writing custom messages without requiring an API change while allowing a wide range of different types of messages.

Messages are posted by objects in the pipeline and are passed to the application using the Bus. The basic use pattern of posting a message on a Bus is as follows: bus.post(new EOSMessage(source)); An Element usually posts messages on the bus provided by the parent container using postMessage().

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Message.Types

Nested classes/interfaces inherited from class org.freedesktop.gstreamer.glib.NativeObject

NativeObject.Initializer, NativeObject.TypeProvider, NativeObject.TypeRegistration<T extends NativeObject>

Field Summary

Fields

Modifier and Type	Field and Description
static String	GTYPE_NAME

Method Summary

Modifier and Type	Method and Description
GstObject	getSource() Gets the Element that posted this message.
Structure	getStructure() Gets the structure containing the data in this message.
MessageType	getType() Gets the type of this message.

Methods inherited from class org.freedesktop.gstreamer.MiniObject

copy, getRefCount, isWritable, makeWritable

Methods inherited from class org.freedesktop.gstreamer.glib.NativeObject

close, disown, dispose, equals, getPointer, getRawPointer, hashCode, invalidate, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

GTYPE_NAME

public static final String GTYPE_NAME

See Also:

Constant Field Values

Method Detail

getSource

public GstObject getSource()

Gets the Element that posted this message.

Returns:

the element that posted the message.

getStructure

public Structure getStructure()

Gets the structure containing the data in this message.

Returns:

a structure.

getType

public MessageType getType()

Gets the type of this message.

Returns:

the message type.