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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>
71 lines
2.1 KiB
C++
71 lines
2.1 KiB
C++
/*
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* Author: Jon Trulson <jtrulson@ics.com>
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* Copyright (c) 2016 Intel Corporation.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <unistd.h>
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#include <iostream>
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#include "vcap.hpp"
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using namespace std;
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int main(int argc, char **argv)
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{
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//! [Interesting]
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string defaultDev = "/dev/video0";
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// if an argument was specified, use it as the device instead
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if (argc > 1)
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defaultDev = string(argv[1]);
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cout << "Using device " << defaultDev << endl;
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cout << "Initializing..." << endl;
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// Instantiate an VCAP instance, using the specified video device
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upm::VCAP *sensor = new upm::VCAP(defaultDev);
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// enable some debug/verbose output
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sensor->setDebug(true);
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// This is just a hint. The kernel can change this to a lower
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// resolution that the hardware supports. Use getWidth() and
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// getHeight() methods to see what the kernel actually chose if you
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// care.
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sensor->setResolution(1920, 1080);
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// capture an image
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sensor->captureImage();
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// convert and save it as a jpeg
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sensor->saveImage("video-img1.jpg");
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cout << "Exiting..." << endl;
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delete sensor;
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//! [Interesting]
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return 0;
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}
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