com.github.sarxos.webcam.ds.cgt.WebcamGetBufferTask 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.ds.cgt;

import java.nio.ByteBuffer;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.github.sarxos.webcam.WebcamDevice;
import com.github.sarxos.webcam.WebcamDevice.BufferAccess;
import com.github.sarxos.webcam.WebcamDriver;
import com.github.sarxos.webcam.WebcamTask;


public class WebcamGetBufferTask extends WebcamTask {

	private static final Logger LOG = LoggerFactory.getLogger(WebcamGetBufferTask.class);

	private volatile ByteBuffer buffer = null;

	public WebcamGetBufferTask(WebcamDriver driver, WebcamDevice device) {
		super(driver, device);
	}

	public ByteBuffer getBuffer() {
		try {
			process();
		} catch (InterruptedException e) {
			LOG.debug("Image buffer request interrupted", e);
			return null;
		}
		return buffer;
	}

	@Override
	protected void handle() {

		WebcamDevice device = getDevice();
		if (!device.isOpen()) {
			return;
		}

		if (!(device instanceof BufferAccess)) {
			return;
		}

		buffer = ((BufferAccess) device).getImageBytes();
	}
}