upm/examples/java/VCAP_Example.java
Jon Trulson 4f6be750c7 vcap: Initial implementation
This UPM module captures a still frame from a Linux V4L device, such
as a USB webcam, and and then allows you to save it as a JPEG image
into a file.

The camera and driver in use must support streaming, mmap-able buffers
and must provide data in YUYV format.  This should encompass most
video cameras out there.  It has been tested with a few off the shelf
USB cameras without any problems.

Signed-off-by: Jon Trulson <jtrulson@ics.com>
Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>
2016-04-19 15:38:48 -07:00

61 lines
2.2 KiB
Java

/*
* Author: Jon Trulson <jtrulson@ics.com>
* Copyright (c) 2016 Intel Corporation.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
import upm_vcap.VCAP;
public class VCAP_Example
{
private static String defaultDev = "/dev/video0";
public static void main(String[] args) throws InterruptedException
{
// ! [Interesting]
if (args.length > 0)
defaultDev = args[0];
System.out.println("Using device " + defaultDev);
System.out.println("Initializing...");
// Instantiate an VCAP instance, using the specified video device
VCAP sensor = new VCAP(defaultDev);
// enable some debug/verbose output
sensor.setDebug(true);
// This is just a hint. The kernel can change this to a lower
// resolution that the hardware supports. Use getWidth() and
// getHeight() methods to see what the kernel actually chose if you
// care.
sensor.setResolution(1920, 1080);
// capture an image
sensor.captureImage();
// convert and save it as a jpeg
sensor.saveImage("video-img1.jpg");
// ! [Interesting]
}
}