Visual Servoing Platform  version 3.0.1
manGrabV4l2.cpp
1 /****************************************************************************
2  *
3  * This file is part of the ViSP software.
4  * Copyright (C) 2005 - 2017 by Inria. All rights reserved.
5  *
6  * This software is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU General Public License
8  * ("GPL") version 2 as published by the Free Software Foundation.
9  * See the file LICENSE.txt at the root directory of this source
10  * distribution for additional information about the GNU GPL.
11  *
12  * For using ViSP with software that can not be combined with the GNU
13  * GPL, please contact Inria about acquiring a ViSP Professional
14  * Edition License.
15  *
16  * See http://visp.inria.fr for more information.
17  *
18  * This software was developed at:
19  * Inria Rennes - Bretagne Atlantique
20  * Campus Universitaire de Beaulieu
21  * 35042 Rennes Cedex
22  * France
23  *
24  * If you have questions regarding the use of this file, please contact
25  * Inria at visp@inria.fr
26  *
27  * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
28  * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
29  *
30  * Description:
31  * Images grabbing example.
32  *
33  * Authors:
34  * Anthony Saunier
35  * Fabien Spindler
36  *
37  *****************************************************************************/
51 #include <visp3/core/vpImage.h>
52 #include <visp3/sensor/vpV4l2Grabber.h>
53 
54 int main()
55 {
56  try {
57  vpImage<unsigned char> I; // Grey level image
58 
59 #ifdef VISP_HAVE_V4L2
60  vpV4l2Grabber g;
61  g.setInput(2); // Input 2 on the board
62  g.setWidth(768); // Acquired images are 768 width
63  g.setHeight(576); // Acquired images are 576 height
64  g.setNBuffers(3); // 3 ring buffers to ensure real-time acquisition
65  g.open(I); // Open the grabber
66  for ( ; ; )
67  g.acquire(I); // Acquire a 768x576 grey image
68 #endif
69 
70  return 0;
71  }
72  catch(vpException &e) {
73  std::cout << "Catch an exception: " << e << std::endl;
74  return 1;
75  }
76 }
void acquire(vpImage< unsigned char > &I)
void open(vpImage< unsigned char > &I)
error that can be emited by ViSP classes.
Definition: vpException.h:73
void setHeight(unsigned h)
void setWidth(unsigned w)
void setInput(unsigned input=vpV4l2Grabber::DEFAULT_INPUT)
Class that is a wrapper over the Video4Linux2 (V4L2) driver.
void setNBuffers(unsigned nbuffers)