Fixed uses of WebCam for OpenCV 3.x

AlexeyAB

2018-03-20 fe4f01b1d8cce9762e47aaf42b6e17a3427a144b

 src/demo.c

@@ -39,6 +39,7 @@
static image det_s;
static image disp = {0};
static CvCapture * cap;
static int use_webcam = 0;
static float fps = 0;
static float demo_thresh = 0;

@@ -50,7 +51,7 @@

void draw_detections_cv(IplImage* show_img, int num, float thresh, box *boxes, float **probs, char **names, image **alphabet, int classes);
void show_image_cv_ipl(IplImage *disp, const char *name);
image get_image_from_stream_resize(CvCapture *cap, int w, int h, IplImage** in_img);
image get_image_from_stream_resize(CvCapture *cap, int w, int h, IplImage** in_img, int use_webcam);
IplImage* in_img;
IplImage* det_img;
IplImage* show_img;
@@ -60,7 +61,7 @@
void *fetch_in_thread(void *ptr)
{
    //in = get_image_from_stream(cap);
   in = get_image_from_stream_resize(cap, net.w, net.h, &in_img);
   in = get_image_from_stream_resize(cap, net.w, net.h, &in_img, use_webcam);
    if(!in.data){
        //error("Stream closed.");
      flag_exit = 1;
@@ -143,7 +144,13 @@
        printf("video file: %s\n", filename);
        cap = cvCaptureFromFile(filename);
    }else{
      printf("Webcam index: %d\n", cam_index);
#ifdef CV_VERSION_EPOCH // OpenCV 2.x
        cap = cvCaptureFromCAM(cam_index);
#else             // OpenCV 3.x
      use_webcam = 1;
      cap = get_capture_webcam(cam_index);
#endif
    }

    if(!cap) error("Couldn't connect to webcam.\n");
@@ -233,7 +240,7 @@
            }

         // if you run it with param -http_port 8090  then open URL in your web-browser: http://localhost:8090
         if (http_stream_port > 0) {
         if (http_stream_port > 0 && show_img) {
            //int port = 8090;
            int port = http_stream_port;
            int timeout = 200;
@@ -242,10 +249,11 @@
         }

         // save video file
         if (output_video_writer) {
         if (output_video_writer && show_img) {
            cvWriteFrame(output_video_writer, show_img);
            printf("\n cvWriteFrame \n");
         }

         cvReleaseImage(&show_img);

            pthread_join(fetch_thread, 0);