renaming cvstarter and breaking it appart

samples/cpp/cvstarter.cpp

-/*
- * cvstarter.cpp
- *
- *  Created on: Nov 23, 2010
- *      Author: Ethan Rublee
- *
- * A starter sample for using opencv, load up a list or get a video stream
- * easy as CV_PI right?
- */
-#include <opencv2/opencv.hpp>
-#include <vector>
-
-using namespace cv;
-using namespace std;
-
-//hide the local functions in an anon namespace
-namespace
-{
-void help(char** av)
-{
-  cout << "usage:" << av[0] << " image_list.yaml\n"
-      << "\tThis is a starter sample, to get you up and going in a copy pasta fashion\n"
-      << "\tTry running imagelist_creator to generate a list of images\n"
-      << "\tOr try running this with an integer arg like:\n\n" << av[0] << " 0\n"
-      << "\tThis will open up the video device." << endl;
-}
-
-bool readStringList(const string& filename, vector<string>& l)
-{
-  l.resize(0);
-  FileStorage fs(filename, FileStorage::READ);
-  if (!fs.isOpened())
-    return false;
-  FileNode n = fs.getFirstTopLevelNode();
-  if (n.type() != FileNode::SEQ)
-    return false;
-  FileNodeIterator it = n.begin(), it_end = n.end();
-  for (; it != it_end; ++it)
-    l.push_back((string)*it);
-  return true;
-}
-
-int videoProcess(VideoCapture& capture)
-{
-
-  namedWindow("video",CV_WINDOW_KEEPRATIO); //resizable window;
-  Mat frame;
-  for (;;)
-  {
-    capture >> frame;
-    if (frame.empty())
-      continue;
-    imshow("video",frame);
-    char key = waitKey(5); //delay N millis, usually long enough to display and capture input
-    switch (key)
-    {
-      case 'q':
-      case 'Q':
-      case 27: //escape key
-        return 0;
-      default:
-        break;
-    }
-  }
-  return 0;
-}
-
-int imageListProcess(vector<string> images)
-{
-  namedWindow("image",CV_WINDOW_KEEPRATIO); //resizable window;
-  for (size_t i = 0; i < images.size(); i++)
-  {
-    Mat image = imread(images[i], CV_LOAD_IMAGE_GRAYSCALE); // do grayscale processing?
-    imshow("image",image);
-    cout << "Press a key to see the next image in the list." << endl;
-    waitKey(); // wait indefinitely
-  }
-  return 0;
-}
-
-}
-
-int main(int ac, char** av)
-{
-
-  if (ac != 2)
-  {
-    help(av);
-    return 1;
-  }
-  std::string arg = av[1];
-  vector<string> imagelist;
-
-  if (!readStringList(arg,imagelist))
-  {
-    int ad = atoi(arg.c_str());
-    VideoCapture capture(ad);
-    return videoProcess(capture);
-  }
-  else
-  {
-    return imageListProcess(imagelist);
-  }
-
-  return 0;
-}