Fixed memory leak in ./darknet detector demo ...

src/demo.c

@@ -208,13 +208,13 @@ void demo(char *cfgfile, char *weightfile, float thresh, float hier_thresh, int
     while(1){
         ++count;
         {
-            if(pthread_create(&fetch_thread, 0, fetch_in_thread, 0)) error("Thread creation failed");
-            if(pthread_create(&detect_thread, 0, detect_in_thread, 0)) error("Thread creation failed");
-
-            float nms = .45;    // 0.4F
+            const float nms = .45;    // 0.4F
             int local_nboxes = nboxes;
             detection *local_dets = dets;
 
+            if(pthread_create(&fetch_thread, 0, fetch_in_thread, 0)) error("Thread creation failed");
+            if(pthread_create(&detect_thread, 0, detect_in_thread, 0)) error("Thread creation failed");
+
             //if (nms) do_nms_obj(local_dets, local_nboxes, l.classes, nms);    // bad results
             if (nms) {
                 if (l.nms_kind == DEFAULT_NMS) do_nms_sort(local_dets, local_nboxes, l.classes, nms);
@@ -237,7 +237,7 @@ void demo(char *cfgfile, char *weightfile, float thresh, float hier_thresh, int
                 int timeout = 3;            // 3 seconds
                 int http_post_port = 80;    // 443 https, 80 http
                 if (send_http_post_request(http_post_host, http_post_port, filename,
-                    dets, nboxes, classes, names, frame_id, ext_output, timeout))
+                    local_dets, nboxes, classes, names, frame_id, ext_output, timeout))
                 {
                     if (time_limit_sec > 0) send_http_post_once = 1;
                 }

src/image_opencv.cpp

@@ -763,6 +763,7 @@ extern "C" image get_image_from_stream_resize(cap_cv *cap, int w, int h, int c,
     if (once) {
         once = 0;
         do {
+            if (src) delete src;
             src = (cv::Mat*)get_capture_frame_cv(cap);
             if (!src) return make_empty_image(0, 0, 0);
         } while (src->cols < 1 || src->rows < 1 || src->channels() < 1);
@@ -794,6 +795,7 @@ extern "C" image get_image_from_stream_letterbox(cap_cv *cap, int w, int h, int
     if (once) {
         once = 0;
         do {
+            if (src) delete src;
             src = (cv::Mat*)get_capture_frame_cv(cap);
             if (!src) return make_empty_image(0, 0, 0);
         } while (src->cols < 1 || src->rows < 1 || src->channels() < 1);