ptolemy.actor.lib.jmf

Class VideoCamera.PreAccessCodec

java.lang.Object

ptolemy.actor.lib.jmf.VideoCamera.PreAccessCodec

All Implemented Interfaces:

javax.media.Codec, javax.media.Controls, javax.media.PlugIn

Enclosing class:

VideoCamera

public class VideoCamera.PreAccessCodec
extends java.lang.Object
implements javax.media.Codec

A pass-through codec to access to individual frames.

Field Summary

Fields

Modifier and Type	Field and Description
(package private) javax.media.Format	input The input format.
(package private) javax.media.Format	output The output format.

Fields inherited from interface javax.media.PlugIn

BUFFER_PROCESSED_FAILED, BUFFER_PROCESSED_OK, INPUT_BUFFER_NOT_CONSUMED, OUTPUT_BUFFER_NOT_FILLED, PLUGIN_TERMINATED

Constructor Summary

Constructors

Constructor and Description
PreAccessCodec() Construct a PreAccessCodec.

Method Summary

Modifier and Type	Method and Description
(package private) void	accessFrame(javax.media.Buffer frame) Callback to access individual video frames.
void	close() In this class, do nothing.
java.lang.Object	getControl(java.lang.String type) Get the control for a type.
java.lang.Object[]	getControls() Return the controls, in this case, an empty array of size 0.
(package private) javax.media.Buffer	getFrame() The code for a pass through codec.
java.lang.String	getName() Return the name of this codec.
javax.media.Format[]	getSupportedInputFormats() Return the supported input formats, which are YUV and RGB.
javax.media.Format[]	getSupportedOutputFormats(javax.media.Format in) Return the supported output formats.
void	open() In this class, do nothing.
int	process(javax.media.Buffer in, javax.media.Buffer out) Process a individual frame.
void	reset() In this class, do nothing.
javax.media.Format	setInputFormat(javax.media.Format format) Set the input format.
javax.media.Format	setOutputFormat(javax.media.Format format) Set the output format.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

input

javax.media.Format input

The input format.

output

javax.media.Format output

The output format.

Constructor Detail

PreAccessCodec

public PreAccessCodec()
               throws IllegalActionException

Construct a PreAccessCodec.

Throws:

IllegalActionException - Not thrown in this base class.

Method Detail

accessFrame

void accessFrame(javax.media.Buffer frame)

Callback to access individual video frames.

Parameters:

frame - The individual video frame.

getFrame

javax.media.Buffer getFrame()
                     throws IllegalActionException

The code for a pass through codec.

Returns:

the frame.

Throws:

IllegalActionException

getName

public java.lang.String getName()

Return the name of this codec.

Specified by:

getName in interface javax.media.PlugIn

Returns:

Always return "Pre-Access Codec".

open

public void open()

In this class, do nothing.

Specified by:

open in interface javax.media.PlugIn

close

public void close()

In this class, do nothing.

Specified by:

close in interface javax.media.PlugIn

reset

public void reset()

In this class, do nothing.

Specified by:

reset in interface javax.media.PlugIn

getSupportedInputFormats

public javax.media.Format[] getSupportedInputFormats()

Return the supported input formats, which are YUV and RGB.

Specified by:

getSupportedInputFormats in interface javax.media.Codec

Returns:

the supported input formats.

getSupportedOutputFormats

public javax.media.Format[] getSupportedOutputFormats(javax.media.Format in)

Return the supported output formats.

Specified by:

getSupportedOutputFormats in interface javax.media.Codec

Parameters:

in - The input format. If the input format is null, then YUV and RGB format are returned. If the input format is non-null, then it is returned.

Returns:

the supported output formats.

setInputFormat

public javax.media.Format setInputFormat(javax.media.Format format)

Set the input format.

Specified by:

setInputFormat in interface javax.media.Codec

Parameters:

format - The input format.

Returns:

the input format.

setOutputFormat

public javax.media.Format setOutputFormat(javax.media.Format format)

Set the output format.

Specified by:

setOutputFormat in interface javax.media.Codec

Parameters:

format - The output format.

Returns:

the output format.

process

public int process(javax.media.Buffer in,
                   javax.media.Buffer out)

Process a individual frame.

Specified by:

process in interface javax.media.Codec

Parameters:

in - The input buffer.

out - The output buffer.

Returns:

BUFFER_PROCESSED_OK if no exception was thrown.

getControls

public java.lang.Object[] getControls()

Return the controls, in this case, an empty array of size 0.

Specified by:

getControls in interface javax.media.Controls

Returns:

The controls.

getControl

public java.lang.Object getControl(java.lang.String type)

Get the control for a type.

Specified by:

getControl in interface javax.media.Controls

Parameters:

type - The type, which is ignored.

Returns:

Always return null.