Method getProcessor

ij/src/main/java/ij/plugin/AVI_Reader.java:452–481

Returns an ImageProcessor for the specified slice of this virtual stack (if it is one) where {@literal 1<=n<=nslices}. Returns null if no virtual stack or no slices or error reading the frame.

(int n)

     *  where {@literal 1<=n<=nslices}. Returns null if no virtual stack or no slices or error reading the frame.
	 */
	public synchronized ImageProcessor getProcessor(int n) {
		if (frameInfos==null || frameInfos.size()==0 || raFilePath==null)
			return null;
		n = translate(n); // update n for hyperstacks not in default CZT order
		if (n<1 || n>frameInfos.size())
			throw new IllegalArgumentException("Argument out of range: "+n);
		Object pixels = null;
		RandomAccessFile rFile = null;
		try {
			rFile = new RandomAccessFile(new File(raFilePath), "r");
			long[] frameInfo = (long[])(frameInfos.get(n-1));
			pixels = readFrame(rFile, frameInfo[0], (int)frameInfo[1]);
		} catch (Exception e) {
			error(exceptionMessage(e));
			return null;
		} finally {
			closeFile(rFile);
		}
		if (pixels == null) return null; //failed
		ImageProcessor ip = null;
		if (pixels instanceof byte[])
			ip = new ByteProcessor(dwWidth, biHeight, (byte[])pixels, cm);
		else if (pixels instanceof short[])
			ip = new ShortProcessor(dwWidth, biHeight, (short[])pixels, cm);
		else
			ip = new ColorProcessor(dwWidth, biHeight, (int[])pixels);
		if (ip!=null)
			ip.setSliceNumber(n);
		return ip;
	}

	/** Returns the image width of the virtual stack */
	public int getWidth() {