Examples of com.sun.media.jai.codec.SeekableStream

com.sun.media.jai.codec.SeekableStream
An abstract subclass of java.io.InputStream that allows seeking within the input, similar to the RandomAccessFile class. Additionally, the DataInput interface is supported and extended to include support for little-endian representations of fundamental data types.
In addition to the familiar methods from InputStream, the methods getFilePointer(), seek(), are defined as in the RandomAccessFile class. The canSeekBackwards() method will return true if it is permissible to seek to a position earlier in the stream than the current value of getFilePointer(). Some subclasses of SeekableStream guarantee the ability to seek backwards while others may not offer this feature in the interest of providing greater efficiency for those users who do not require it.
The DataInput interface is supported as well. This included the skipBytes() and readFully() methods and a variety of read methods for various data types.
A number of concrete subclasses of SeekableStream are supplied in the com.sun.media.jai.codec package.
Three classes are provided for the purpose of adapting a standard InputStream to the SeekableStream interface. ForwardSeekableStream does not allows seeking backwards, but is inexpensive to use. FileCacheSeekableStream maintains a copy of all of the data read from the input in a temporary file; this file will be discarded automatically when the FileCacheSeekableStream is finalized, or when the JVM exits normally. FileCacheSeekableStream is intended to be reasonably efficient apart from the unavoidable use of disk space. In circumstances where the creation of a temporary file is not possible, MemoryCacheSeekableStream may be used. MemoryCacheSeekableStream creates a potentially large in-memory buffer to store the stream data and so should be avoided when possible.
The FileSeekableStream class wraps a File or RandomAccessFile. It forwards requests to the real underlying file. It performs a limited amount of caching in order to avoid excessive I/O costs.
The SegmentedSeekableStream class performs a different sort of function. It creates a SeekableStream from another SeekableStream by selecting a series of portions or "segments". Each segment starts at a specified location within the source SeekableStream and extends for a specified number of bytes. The StreamSegmentMapper interface and StreamSegment class may be used to compute the segment positions dynamically.
A convenience methods, wrapInputStream is provided to construct a suitable SeekableStream instance whose data is supplied by a given InputStream. The caller, by means of the canSeekBackwards parameter, determines whether support for seeking backwards is required. @see java.io.DataInput @see java.io.InputStream @see java.io.RandomAccessFile @see ByteArraySeekableStream @see FileCacheSeekableStream @see FileSeekableStream @see ForwardSeekableStream @see MemoryCacheSeekableStream @see SegmentedSeekableStream @see StreamSegment @see StreamSegmentMapper
This class is not a committed part of the JAI API. It may be removed or changed in future releases of JAI.

        init(fileURL);
    }


    public void init(URL fileURL) throws IOException, IllegalArgumentException {
        this.fileURL = fileURL;
        SeekableStream ss = SeekableStream.wrapInputStream(fileURL.openStream(),
                true);
        GeoTIFFDescriptor.register();
        GeoTIFFFactory gtFactory = new GeoTIFFFactory();
        gtfDirectory = (GeoTIFFDirectory) gtFactory.createDirectory(ss, 0);
        geoKeys = gtfDirectory.getGeoKeys();
        ss.close();
    }

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    public BufferedImage getBufferedImage() throws IOException {
        if (fileURL == null) {
            throw new IOException("Image Decoder not created for retrieving image, need to init() GeoTIFFFile.");
        }


        SeekableStream ss = SeekableStream.wrapInputStream(fileURL.openStream(),
                true);
        XTIFFImageDecoder xtffImageDecoder = new XTIFFImageDecoder(ss, new XTIFFDecodeParam());
        RenderedImage ri = xtffImageDecoder.decodeAsRenderedImage();
        BufferedImage bi = new BufferedImage(ri.getColorModel(), ri.copyData(null), false, new Hashtable());
        ss.close();
        return bi;
    }

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        StringBuffer msg = new StringBuffer();
        if (!validateParameters(paramBlock, msg)) {
            return null;
        }
        try {
            SeekableStream in = (SeekableStream) paramBlock.getObjectParameter(0);
            XTIFFImage image = new XTIFFImage(in, (TIFFDecodeParam) paramBlock.getObjectParameter(1), 0);
            return image;
        } catch (Exception e) {
            return null;
        }

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     *                 if the image could not be manipulated correctly.
     */
    public static byte[] resizeImageAsJPG(byte[] pImageData, int pMaxWidth, int pMaxHeight) throws IOException {
    InputStream imageInputStream = new ByteArrayInputStream(pImageData);
    // read in the original image from an input stream
    SeekableStream seekableImageStream = SeekableStream.wrapInputStream(imageInputStream, true);
    RenderedOp originalImage = JAI.create(JAI_STREAM_ACTION, seekableImageStream);
    ((OpImage) originalImage.getRendering()).setTileCache(null);
    int origImageWidth = originalImage.getWidth();
    int origImageHeight = originalImage.getHeight();
    // now resize the image

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     * @param input the <code>File</code> containing the image
     * @return an SWT <code>ImageData</code> version of the image data
     */
    public ImageData load(File input) throws IOException  {


        SeekableStream s = new FileSeekableStream(input);


        TIFFDecodeParam param = new TIFFDecodeParam();
        param.setDecodePaletteAsShorts( false );
        ImageDecoder dec = ImageCodec.createImageDecoder("tiff", s, param); //$NON-NLS-1$
        int imageToLoad = 0;

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     */
    public void fire() throws IllegalActionException {
        super.fire();


        InputStream inputStream = null;
        SeekableStream seekableStream = null;


        try {
            try {
                inputStream = _fileURL.openStream();


                // We use a FileCacheSeekableStream here because
                // we need to have a stream that can go backwards.
                // If we are running under the windows installer, Web Start
                // or any other jar based installation, we need to be
                // able to handle images in jar files.
                seekableStream = new FileCacheSeekableStream(inputStream);
            } catch (IOException ex) {
                throw new IllegalActionException(this, ex,
                        "Unable to load file '" + _fileURL + "'");
            }


            _outputtedImage = JAI.create("stream", seekableStream);


            /*PlanarImage dummy =*/_outputtedImage.getRendering();
        } finally {
            if (seekableStream != null) {
                try {
                    seekableStream.close();
                } catch (Throwable throwable2) {
                    throw new IllegalActionException(this, throwable2,
                            "Unable to close SeekableStream for '" + _fileURL
                                    + "'");
                }

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    }


    public static void main(String[] args) {
        try {
            RandomAccessFile f = new RandomAccessFile(args[0], "r");
            SeekableStream sis = new FileSeekableStream(f);
            StructuredStorage ss = new StructuredStorage(sis);


            ss.changeDirectoryToRoot();


            byte[] s = ss.getStreamAsBytes("SummaryInformation");

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    }


    private void readImageContents() throws IOException  {
        storage.changeDirectoryToRoot();
        storage.changeDirectory("Data Object Store 000001");
        SeekableStream imageContents =
            storage.getStream("Image Contents");


        PropertySet icps = new PropertySet(imageContents);
        this.numResolutions   = (int)icps.getUI4(0x01000000);
        this.highestResWidth  = (int)icps.getUI4(0x01000002);

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            properties.put(name.toLowerCase(), new Integer((int)i));
        }
    }


    private void getSummaryInformation() {
        SeekableStream summaryInformation = null;
        PropertySet sips = null;
        try {
            storage.changeDirectoryToRoot();
            summaryInformation = storage.getStream("SummaryInformation");
            sips = new PropertySet(summaryInformation);

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        addLPSTRProperty("last saved by", sips, 0x000000008);
        addLPSTRProperty("revision number", sips, 0x000000009);
    }


    private void getImageInfo() {
        SeekableStream imageInfo = null;
        PropertySet iips = null;
        try {
            storage.changeDirectoryToRoot();
            imageInfo = storage.getStream("Image Info");
            if (imageInfo == null) {

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