com.github.sarxos.webcam.WebcamTask Maven / Gradle / Ivy

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This library allows you to use your PC webcam, IP or network cameras directly from Java. It's compatible with most operating systems (Windows, Linux, MacOS).

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package com.github.sarxos.webcam;



public abstract class WebcamTask {

	private boolean doSync = true;
	private WebcamProcessor processor = null;
	private WebcamDevice device = null;
	private Throwable throwable = null;

	public WebcamTask(boolean threadSafe, WebcamDevice device) {
		this.doSync = !threadSafe;
		this.device = device;
		this.processor = WebcamProcessor.getInstance();
	}

	public WebcamTask(WebcamDriver driver, WebcamDevice device) {
		this(driver.isThreadSafe(), device);
	}

	public WebcamTask(WebcamDevice device) {
		this(false, device);
	}

	public WebcamDevice getDevice() {
		return device;
	}

	/**
	 * Process task by processor thread.
	 * 
	 * @throws InterruptedException when thread has been interrupted
	 */
	public void process() throws InterruptedException {

		boolean alreadyInSync = Thread.currentThread() instanceof WebcamProcessor.ProcessorThread;

		if (alreadyInSync) {
			handle();
		} else {
			if (doSync) {
				if (processor == null) {
					throw new RuntimeException("Driver should be synchronized, but processor is null");
				}
				processor.process(this);
			} else {
				handle();
			}
		}
	}

	public Throwable getThrowable() {
		return throwable;
	}

	public void setThrowable(Throwable t) {
		this.throwable = t;
	}

	protected abstract void handle();
}