ptolemy.actor.lib.jmf
Class VideoCamera
java.lang.Object
ptolemy.kernel.util.NamedObj
ptolemy.kernel.InstantiableNamedObj
ptolemy.kernel.Entity
ptolemy.kernel.ComponentEntity
ptolemy.actor.AtomicActor
ptolemy.actor.TypedAtomicActor
ptolemy.actor.lib.Source
ptolemy.actor.lib.jmf.VideoCamera
- All Implemented Interfaces:
- java.io.Serializable, java.lang.Cloneable, javax.media.ControllerListener, Actor, Executable, FiringsRecordable, Initializable, TypedActor, Changeable, Debuggable, DebugListener, Derivable, Instantiable, ModelErrorHandler, MoMLExportable, Moveable, Nameable
public class VideoCamera
- extends Source
- implements javax.media.ControllerListener
An actor that produces a sequence of frames from a video camera.
This actor requires the Java Media Framework, and has been tested
at least with version 2.1.1.
FIXME: more info.
- Since:
- Ptolemy II 3.0
- Version:
- $Id: VideoCamera.java 57040 2010-01-27 20:52:32Z cxh $
- Author:
- Christopher Hylands, Edward Lee, James Yeh, Paul Yang, David Lee
- See Also:
- Serialized Form
- Accepted Rating:
- Proposed Rating:
Fields inherited from class ptolemy.kernel.util.NamedObj |
_changeListeners, _changeLock, _changeRequests, _debugging, _debugListeners, _elementName, _isPersistent, _verbose, _workspace, ATTRIBUTES, CLASSNAME, COMPLETE, CONTENTS, DEEP, FULLNAME, LINKS |
Constructor Summary |
VideoCamera(CompositeEntity container,
java.lang.String name)
Construct an actor with the given container and name. |
Method Summary |
protected boolean |
_waitForState(int state)
Block until the processor has transitioned to the given state. |
void |
controllerUpdate(javax.media.ControllerEvent evt)
Controller Listener. |
void |
fire()
Capture a frame and send a java.awt.Image object
to the output port. |
void |
initialize()
Open the file at the URL, and set the width of the output. |
void |
wrapup()
Close the media processor. |
Methods inherited from class ptolemy.actor.AtomicActor |
_actorFiring, _actorFiring, addActorFiringListener, addInitializable, clone, connectionsChanged, createReceivers, declareDelayDependency, getCausalityInterface, getDirector, getExecutiveDirector, getManager, inputPortList, isFireFunctional, isStrict, iterate, newReceiver, outputPortList, postfire, preinitialize, pruneDependencies, recordFiring, removeActorFiringListener, removeDependency, removeInitializable, setContainer, stop, stopFire, terminate |
Methods inherited from class ptolemy.kernel.ComponentEntity |
_adjustDeferrals, _checkContainer, _getContainedObject, _propagateExistence, getContainer, instantiate, isAtomic, isOpaque, moveDown, moveToFirst, moveToIndex, moveToLast, moveUp, propagateExistence, setName |
Methods inherited from class ptolemy.kernel.Entity |
_description, _exportMoMLContents, _removePort, _validateSettables, connectedPortList, connectedPorts, containedObjectsIterator, getAttribute, getPort, getPorts, linkedRelationList, linkedRelations, portList, removeAllPorts, setClassDefinition, uniqueName |
Methods inherited from class ptolemy.kernel.util.NamedObj |
_addAttribute, _adjustOverride, _attachText, _cloneFixAttributeFields, _debug, _debug, _debug, _debug, _debug, _getIndentPrefix, _isMoMLSuppressed, _markContentsDerived, _propagateValue, _recordDecoratedAttributes, _removeAttribute, _splitName, _stripNumericSuffix, addChangeListener, addDebugListener, attributeChanged, attributeList, attributeList, deepContains, depthInHierarchy, description, description, event, executeChangeRequests, exportMoML, exportMoML, exportMoML, exportMoML, exportMoMLPlain, getAttribute, getAttributes, getChangeListeners, getClassName, getDecoratorAttribute, getDecoratorAttributes, getDerivedLevel, getDerivedList, getDisplayName, getFullName, getModelErrorHandler, getName, getName, getSource, handleModelError, isDeferringChangeRequests, isOverridden, isPersistent, lazyContainedObjectsIterator, message, propagateValue, propagateValues, removeChangeListener, removeDebugListener, requestChange, setClassName, setDeferringChangeRequests, setDerivedLevel, setDisplayName, setModelErrorHandler, setPersistent, setSource, sortContainedObjects, toplevel, toString, validateSettables, workspace |
Methods inherited from class java.lang.Object |
equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
formatName
public StringAttribute formatName
- The type of video format to use. This is a string valued
attribute that defaults to the type RGB.
deviceNumber
public Parameter deviceNumber
- This parameter lets the user select the device to use.
Typically this parameter is of no concern and should be left
at 0. However, if a computer has more than one usable
cameras, this parameter can be used to choose amongst them.
_format
private javax.media.format.VideoFormat _format
_bufferNew
private javax.media.Buffer _bufferNew
- The java.awt.Image that we are producing/
_newFrame
private boolean _newFrame
_processor
private javax.media.Processor _processor
- The video processor.
_cameraCodec
private VideoCamera.PreAccessCodec _cameraCodec
_waitSync
private java.lang.Object _waitSync
_stateTransitionOK
private boolean _stateTransitionOK
_frameBuffer
private javax.media.Buffer _frameBuffer
VideoCamera
public VideoCamera(CompositeEntity container,
java.lang.String name)
throws IllegalActionException,
NameDuplicationException
- Construct an actor with the given container and name.
- Parameters:
container
- The container.name
- The name of this actor.
- Throws:
IllegalActionException
- If the actor cannot be contained
by the proposed container.
NameDuplicationException
- If the container already has an
actor with this name.
controllerUpdate
public void controllerUpdate(javax.media.ControllerEvent evt)
- Controller Listener.
- Specified by:
controllerUpdate
in interface javax.media.ControllerListener
fire
public void fire()
throws IllegalActionException
- Capture a frame and send a java.awt.Image object
to the output port.
- Specified by:
fire
in interface Executable
- Overrides:
fire
in class Source
- Throws:
IllegalActionException
- If there's no director.
initialize
public void initialize()
throws IllegalActionException
- Open the file at the URL, and set the width of the output.
- Specified by:
initialize
in interface Initializable
- Overrides:
initialize
in class AtomicActor
- Throws:
IllegalActionException
- If there are no video capture
devices.
wrapup
public void wrapup()
- Close the media processor.
- Specified by:
wrapup
in interface Initializable
- Overrides:
wrapup
in class AtomicActor
_waitForState
protected boolean _waitForState(int state)
- Block until the processor has transitioned to the given state.
Return false if the transition failed.
- Parameters:
state
- The state for which we are waiting.
- Returns:
- True if the state transition is ok, otherwise return false.