ViSP
manGrabV4l2.cpp
1 /****************************************************************************
2  *
3  * $Id: manGrabV4l2.cpp 4574 2014-01-09 08:48:51Z fspindle $
4  *
5  * This file is part of the ViSP software.
6  * Copyright (C) 2005 - 2014 by INRIA. All rights reserved.
7  *
8  * This software is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU General Public License
10  * ("GPL") version 2 as published by the Free Software Foundation.
11  * See the file LICENSE.txt at the root directory of this source
12  * distribution for additional information about the GNU GPL.
13  *
14  * For using ViSP with software that can not be combined with the GNU
15  * GPL, please contact INRIA about acquiring a ViSP Professional
16  * Edition License.
17  *
18  * See http://www.irisa.fr/lagadic/visp/visp.html for more information.
19  *
20  * This software was developed at:
21  * INRIA Rennes - Bretagne Atlantique
22  * Campus Universitaire de Beaulieu
23  * 35042 Rennes Cedex
24  * France
25  * http://www.irisa.fr/lagadic
26  *
27  * If you have questions regarding the use of this file, please contact
28  * INRIA at visp@inria.fr
29  *
30  * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
31  * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
32  *
33  *
34  * Description:
35  * Images grabbing example.
36  *
37  * Authors:
38  * Anthony Saunier
39  * Fabien Spindler
40  *
41  *****************************************************************************/
55 #include <visp/vpImage.h>
56 #include <visp/vpV4l2Grabber.h>
57 
58 int main()
59 {
60  try {
61  vpImage<unsigned char> I; // Grey level image
62 
63 #ifdef VISP_HAVE_V4L2
64  vpV4l2Grabber g;
65  g.setInput(2); // Input 2 on the board
66  g.setWidth(768); // Acquired images are 768 width
67  g.setHeight(576); // Acquired images are 576 height
68  g.setNBuffers(3); // 3 ring buffers to ensure real-time acquisition
69  g.open(I); // Open the grabber
70  for ( ; ; )
71  g.acquire(I); // Acquire a 768x576 grey image
72 #endif
73 
74  return 0;
75  }
76  catch(vpException e) {
77  std::cout << "Catch an exception: " << e << std::endl;
78  return 1;
79  }
80 }
void acquire(vpImage< unsigned char > &I)
void open(vpImage< unsigned char > &I)
error that can be emited by ViSP classes.
Definition: vpException.h:76
void setHeight(unsigned h)
void setWidth(unsigned w)
void setInput(unsigned input=vpV4l2Grabber::DEFAULT_INPUT)
Class for the Video4Linux2 video device.
void setNBuffers(unsigned nbuffers)