File	Doc	Category	Size	Date	Package
JPEGRenderer.java	API Doc	JMF 2.1.1e	4494	Mon May 12 12:20:48 BST 2003	com.sun.media.renderer.video

JPEGRenderer

• java.lang.Object
  • com.sun.media.BasicPlugIn
    • com.sun.media.renderer.video.BasicVideoRenderer

Fields Summary
private static final String	MyName Variables and Constants
private VideoFormat	supportedJPEG
private VideoFormat	supportedMJPG
private boolean	forceToFail

Constructors Summary

public JPEGRenderer() Constructor super(MyName); // Check if the native jpeg decoder is there. If it is, disable // this renderer by return null from setInputFormat. if (plugInExists("com.sun.media.codec.video.jpeg.NativeDecoder", PlugInManager.CODEC)) { try { JMFSecurityManager.loadLibrary("jmutil"); JMFSecurityManager.loadLibrary("jmjpeg"); forceToFail = true; } catch (Throwable t) { } } // Prepare supported input formats and preferred format supportedJPEG = new VideoFormat(VideoFormat.JPEG, null, Format.NOT_SPECIFIED, Format.byteArray, // frame rate Format.NOT_SPECIFIED); supportedMJPG = new VideoFormat(VideoFormat.MJPG, null, Format.NOT_SPECIFIED, Format.byteArray, // frame rate Format.NOT_SPECIFIED); supportedFormats = new VideoFormat[1]; supportedFormats[0] = supportedJPEG; //supportedFormats[1] = supportedMJPG;

Methods Summary
public synchronized int	doProcess(javax.media.Buffer buffer) Processes the data and renders it to the output device represented by this renderer. if (component == null) return BUFFER_PROCESSED_OK; if (!buffer.getFormat().equals(inputFormat)) { Format in = buffer.getFormat(); if (!(in.matches(supportedJPEG))) return BUFFER_PROCESSED_FAILED; else { inputFormat = (VideoFormat) in; } } Dimension size = inputFormat.getSize(); Object data = buffer.getData(); if (!(data instanceof byte[])) return BUFFER_PROCESSED_FAILED; Image im = Toolkit.getDefaultToolkit().createImage((byte[])data); MediaTracker tracker = new MediaTracker(component); Dimension d = component.getSize(); outWidth = d.width; outHeight = d.height; tracker.addImage(im, 0); try { tracker.waitForAll(); } catch (Exception e) {} Graphics g = component.getGraphics(); if (g != null) { g.drawImage(im, 0, 0, outWidth, outHeight, 0, 0, size.width, size.height, component); } return BUFFER_PROCESSED_OK;
public void	forceToUse() // Override the forceToFail Flag. forceToFail = false;
public void	open() Opens the plug-in software or hardware component and acquires necessary resources. If all the needed resources could not be acquired, it throws a ResourceUnavailableException. Data should not be passed into the plug-in without first calling this method.
protected void	repaint()
public void	reset() Resets the state of the plug-in. Typically at end of media or when media is repositioned.
public javax.media.Format	setInputFormat(javax.media.Format format) Set the data input format. return false if the format is not supported. if (forceToFail) return null; if (super.setInputFormat(format) != null) { reset(); return format; } else return null;