Visual Servoing Platform  version 3.2.0 under development (2018-08-18)
videoReader.cpp

Reading a video file using vpVideoReader class.

/****************************************************************************
*
* This file is part of the ViSP software.
* Copyright (C) 2005 - 2017 by Inria. All rights reserved.
*
* This software is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
* See the file LICENSE.txt at the root directory of this source
* distribution for additional information about the GNU GPL.
*
* For using ViSP with software that can not be combined with the GNU
* GPL, please contact Inria about acquiring a ViSP Professional
* Edition License.
*
* See http://visp.inria.fr for more information.
*
* This software was developed at:
* Inria Rennes - Bretagne Atlantique
* Campus Universitaire de Beaulieu
* 35042 Rennes Cedex
* France
*
* If you have questions regarding the use of this file, please contact
* Inria at visp@inria.fr
*
* This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
* WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*
* Description:
* Reading a video file.
*
* Authors:
* Eric Marchand
*
*****************************************************************************/
#include <visp3/core/vpConfig.h>
#include <visp3/core/vpDebug.h>
#include <visp3/core/vpImage.h>
#include <visp3/core/vpIoTools.h>
#include <visp3/gui/vpDisplayGDI.h>
#include <visp3/gui/vpDisplayGTK.h>
#include <visp3/gui/vpDisplayOpenCV.h>
#include <visp3/gui/vpDisplayX.h>
#include <visp3/io/vpImageIo.h>
#include <visp3/io/vpParseArgv.h>
#include <visp3/io/vpVideoReader.h>
#if defined(VISP_HAVE_X11) || defined(VISP_HAVE_GDI) || defined(VISP_HAVE_OPENCV) || defined(VISP_HAVE_GTK)
// List of allowed command line options
#define GETOPTARGS "cdi:p:h"
void usage(const char *name, const char *badparam, std::string ipath, std::string ppath);
bool getOptions(int argc, const char **argv, std::string &ipath, std::string &ppath, bool &click_allowed,
bool &display);
void usage(const char *name, const char *badparam, std::string ipath, std::string ppath)
{
fprintf(stdout, "\n\
Read a video file on the disk.\n\
\n\
SYNOPSIS\n\
%s [-i <input video path>] \n\
[-h]\n \
", name);
fprintf(stdout, "\n\
OPTIONS: Default\n\
-i <input video path> %s\n\
Set video input path.\n\
From this path read \"video/video.mpeg\"\n\
video.\n\
Setting the VISP_INPUT_IMAGE_PATH environment\n\
variable produces the same behaviour than using\n\
this option.\n\
\n\
-p <personal video path> %s\n\
Specify a personal folder containing a video \n\
to process.\n\
Example : \"/Temp/ViSP-images/video/video.mpeg\"\n\
\n\
-c\n\
Disable the mouse click. Useful to automaze the \n\
execution of this program without humain intervention.\n\
\n\
-d \n\
Turn off the display.\n\
\n\
-h\n\
Print the help.\n\n", ipath.c_str(), ppath.c_str());
if (badparam) {
fprintf(stderr, "ERROR: \n");
fprintf(stderr, "\nBad parameter [%s]\n", badparam);
}
}
bool getOptions(int argc, const char **argv, std::string &ipath, std::string &ppath, bool &click_allowed, bool &display)
{
const char *optarg_;
int c;
while ((c = vpParseArgv::parse(argc, argv, GETOPTARGS, &optarg_)) > 1) {
switch (c) {
case 'c':
click_allowed = false;
break;
case 'd':
display = false;
break;
case 'i':
ipath = optarg_;
break;
case 'p':
ppath = optarg_;
break;
case 'h':
usage(argv[0], NULL, ipath, ppath);
return false;
break;
default:
usage(argv[0], optarg_, ipath, ppath);
return false;
break;
}
}
if ((c == 1) || (c == -1)) {
// standalone param or error
usage(argv[0], NULL, ipath, ppath);
std::cerr << "ERROR: " << std::endl;
std::cerr << " Bad argument " << optarg_ << std::endl << std::endl;
return false;
}
return true;
}
int main(int argc, const char **argv)
{
try {
std::string env_ipath;
std::string opt_ipath;
std::string ipath;
std::string opt_ppath;
std::string filename;
bool opt_click_allowed = true;
bool opt_display = true;
std::cout << "-------------------------------------------------------" << std::endl;
std::cout << " videoReader.cpp" << std::endl << std::endl;
std::cout << " reading a video file" << std::endl;
std::cout << "-------------------------------------------------------" << std::endl;
std::cout << std::endl;
// Get the visp-images-data package path or VISP_INPUT_IMAGE_PATH
// environment variable value
// Set the default input path
if (!env_ipath.empty())
ipath = env_ipath;
// Read the command line options
if (getOptions(argc, argv, opt_ipath, opt_ppath, opt_click_allowed, opt_display) == false) {
exit(-1);
}
// Get the option values
if (!opt_ipath.empty())
ipath = opt_ipath;
// Compare ipath and env_ipath. If they differ, we take into account
// the input path comming from the command line option
if (!opt_ipath.empty() && !env_ipath.empty() && opt_ppath.empty()) {
if (ipath != env_ipath) {
std::cout << std::endl << "WARNING: " << std::endl;
std::cout << " Since -i <visp image path=" << ipath << "> "
<< " is different from VISP_IMAGE_PATH=" << env_ipath << std::endl
<< " we skip the environment variable." << std::endl;
}
}
// Test if an input path is set
if (opt_ipath.empty() && env_ipath.empty() && opt_ppath.empty()) {
usage(argv[0], NULL, ipath, opt_ppath);
std::cerr << std::endl << "ERROR:" << std::endl;
std::cerr << " Use -i <visp image path> option or set VISP_INPUT_IMAGE_PATH " << std::endl
<< " environment variable to specify the location of the " << std::endl
<< " video path where test images are located." << std::endl
<< std::endl;
exit(-1);
}
// vpImage is a template class you can declare vpImage of ...
// everything...
// Create the video Reader
vpVideoReader reader;
if (opt_ppath.empty()) {
filename = vpIoTools::createFilePath(ipath, "video/cube.mpeg");
} else {
filename.assign(opt_ppath);
}
// Initialize the reader and get the first frame.
std::cout << "Process video in " << filename << std::endl;
reader.setFileName(filename);
reader.open(I);
// We open a window using either X11, GTK, GDI or OpenCV.
#if defined VISP_HAVE_X11
vpDisplayX display;
#elif defined VISP_HAVE_GTK
vpDisplayGTK display;
#elif defined VISP_HAVE_GDI
vpDisplayGDI display;
#elif defined VISP_HAVE_OPENCV
vpDisplayOpenCV display;
#endif
if (opt_display) {
// Display size is automatically defined by the image (I) size
display.init(I, 100, 100, "Display video frame");
}
// if (opt_display && opt_click_allowed)
// {
// std::cout << "Click on the image to read and display the last key
// frame" << std::endl; vpDisplay::getClick(I);
// }
//
// reader.getFrame(I,reader.getLastFrameIndex());
//
// if (opt_display)
// {
// vpDisplay::display(I) ;
// vpDisplay::flush(I);
// }
if (opt_display && opt_click_allowed) {
std::cout << "Click to see the video" << std::endl;
}
while (!reader.end()) {
reader.acquire(I);
std::cout << "Display frame: " << reader.getFrameIndex() << std::endl;
if (opt_display) {
}
}
if (opt_display && opt_click_allowed) {
std::cout << "Click to exit this example" << std::endl;
}
} catch (const vpException &e) {
std::cout << "Catch an exception: " << e << std::endl;
}
return EXIT_SUCCESS;
}
#else
int main()
{
std::cout << "Sorry, no display is available. We quit this example." << std::endl;
return EXIT_SUCCESS;
}
#endif