From 3d2d0a7c98dbc8923d9ff705b81ff4f7940ea6ff Mon Sep 17 00:00:00 2001
From: Alexey <AlexeyAB@users.noreply.github.com>
Date: Tue, 10 Jul 2018 22:24:17 +0000
Subject: [PATCH] Merge pull request #1172 from sberan/flush-stdout

---
 src/demo.c |  252 +++++++++++++++++++++++++++++---------------------
 1 files changed, 146 insertions(+), 106 deletions(-)

diff --git a/src/demo.c b/src/demo.c
index 9041c73..1b6b952 100644
--- a/src/demo.c
+++ b/src/demo.c
@@ -40,6 +40,7 @@
 static int cpp_video_capture = 0;
 static float fps = 0;
 static float demo_thresh = 0;
+static int demo_ext_output = 0;
 
 static float *predictions[FRAMES];
 static int demo_index = 0;
@@ -48,33 +49,40 @@
 static float *avg;
 
 void draw_detections_cv(IplImage* show_img, int num, float thresh, box *boxes, float **probs, char **names, image **alphabet, int classes);
-void draw_detections_cv_v3(IplImage* show_img, detection *dets, int num, float thresh, char **names, image **alphabet, int classes);
+void draw_detections_cv_v3(IplImage* show_img, detection *dets, int num, float thresh, char **names, image **alphabet, int classes, int ext_output);
 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, int cpp_video_capture);
+image get_image_from_stream_resize(CvCapture *cap, int w, int h, int c, IplImage** in_img, int cpp_video_capture, int dont_close);
+image get_image_from_stream_letterbox(CvCapture *cap, int w, int h, int c, IplImage** in_img, int cpp_video_capture, int dont_close);
+int get_stream_fps(CvCapture *cap, int cpp_video_capture);
 IplImage* in_img;
 IplImage* det_img;
 IplImage* show_img;
 
 static int flag_exit;
+static int letter_box = 0;
 
 void *fetch_in_thread(void *ptr)
 {
     //in = get_image_from_stream(cap);
-	in_s = get_image_from_stream_resize(cap, net.w, net.h, &in_img, cpp_video_capture);
+    int dont_close_stream = 0;    // set 1 if your IP-camera periodically turns off and turns on video-stream
+    if(letter_box)
+        in_s = get_image_from_stream_letterbox(cap, net.w, net.h, net.c, &in_img, cpp_video_capture, dont_close_stream);
+    else
+        in_s = get_image_from_stream_resize(cap, net.w, net.h, net.c, &in_img, cpp_video_capture, dont_close_stream);
     if(!in_s.data){
         //error("Stream closed.");
-		printf("Stream closed.\n");
-		flag_exit = 1;
-		return EXIT_FAILURE;
+        printf("Stream closed.\n");
+        flag_exit = 1;
+        return EXIT_FAILURE;
     }
     //in_s = resize_image(in, net.w, net.h);
-	
+
     return 0;
 }
 
 void *detect_in_thread(void *ptr)
 {
-    float nms = .45;	// 0.4F
+    float nms = .45;    // 0.4F
 
     layer l = net.layers[net.n-1];
     float *X = det_s.data;
@@ -85,38 +93,30 @@
     l.output = avg;
 
     free_image(det_s);
-	/*
-    if(l.type == DETECTION){
-        get_detection_boxes(l, 1, 1, demo_thresh, probs, boxes, 0);
-    } else if (l.type == REGION){
-        get_region_boxes(l, 1, 1, demo_thresh, probs, boxes, 0, 0);
-    } else {
-        error("Last layer must produce detections\n");
-    }
-    if (nms > 0) do_nms(boxes, probs, l.w*l.h*l.n, l.classes, nms);
-	*/
-	int letter = 0;
-	int nboxes = 0;
-	detection *dets = get_network_boxes(&net, det_s.w, det_s.h, demo_thresh, demo_thresh, 0, 1, &nboxes, letter);
-	if (nms) do_nms_obj(dets, nboxes, l.classes, nms);
+
+    int nboxes = 0;
+    detection *dets = NULL;
+    if (letter_box)
+        dets = get_network_boxes(&net, in_img->width, in_img->height, demo_thresh, demo_thresh, 0, 1, &nboxes, 1); // letter box
+    else
+        dets = get_network_boxes(&net, det_s.w, det_s.h, demo_thresh, demo_thresh, 0, 1, &nboxes, 0); // resized
+    //if (nms) do_nms_obj(dets, nboxes, l.classes, nms);    // bad results
+    if (nms) do_nms_sort(dets, nboxes, l.classes, nms);
+
 
     printf("\033[2J");
     printf("\033[1;1H");
     printf("\nFPS:%.1f\n",fps);
     printf("Objects:\n\n");
 
-    //images[demo_index] = det;
-    //det = images[(demo_index + FRAMES/2 + 1)%FRAMES];
-	ipl_images[demo_index] = det_img;
-	det_img = ipl_images[(demo_index + FRAMES / 2 + 1) % FRAMES];
+    ipl_images[demo_index] = det_img;
+    det_img = ipl_images[(demo_index + FRAMES / 2 + 1) % FRAMES];
     demo_index = (demo_index + 1)%FRAMES;
-	    
-	//draw_detections(det, l.w*l.h*l.n, demo_thresh, boxes, probs, demo_names, demo_alphabet, demo_classes);
-	draw_detections_cv_v3(det_img, dets, nboxes, demo_thresh, demo_names, demo_alphabet, demo_classes);
-	//draw_detections_cv(det_img, l.w*l.h*l.n, demo_thresh, boxes, probs, demo_names, demo_alphabet, demo_classes);
-	free_detections(dets, nboxes);
 
-	return 0;
+    draw_detections_cv_v3(det_img, dets, nboxes, demo_thresh, demo_names, demo_alphabet, demo_classes, demo_ext_output);
+    free_detections(dets, nboxes);
+
+    return 0;
 }
 
 double get_wall_time()
@@ -129,7 +129,7 @@
 }
 
 void demo(char *cfgfile, char *weightfile, float thresh, float hier_thresh, int cam_index, const char *filename, char **names, int classes,
-	int frame_skip, char *prefix, char *out_filename, int http_stream_port, int dont_show)
+    int frame_skip, char *prefix, char *out_filename, int http_stream_port, int dont_show, int ext_output)
 {
     //skip = frame_skip;
     image **alphabet = load_alphabet();
@@ -138,34 +138,40 @@
     demo_alphabet = alphabet;
     demo_classes = classes;
     demo_thresh = thresh;
+    demo_ext_output = ext_output;
     printf("Demo\n");
-    net = parse_network_cfg_custom(cfgfile, 1);	// set batch=1
+    net = parse_network_cfg_custom(cfgfile, 1);    // set batch=1
     if(weightfile){
         load_weights(&net, weightfile);
     }
     //set_batch_network(&net, 1);
-	fuse_conv_batchnorm(net);
+    fuse_conv_batchnorm(net);
     srand(2222222);
 
     if(filename){
         printf("video file: %s\n", filename);
-//#ifdef CV_VERSION_EPOCH	// OpenCV 2.x
-//		cap = cvCaptureFromFile(filename);
-//#else					// OpenCV 3.x
-		cpp_video_capture = 1;
-		cap = get_capture_video_stream(filename);
+//#ifdef CV_VERSION_EPOCH    // OpenCV 2.x
+//        cap = cvCaptureFromFile(filename);
+//#else                    // OpenCV 3.x
+        cpp_video_capture = 1;
+        cap = get_capture_video_stream(filename);
 //#endif
     }else{
-		printf("Webcam index: %d\n", cam_index);
-//#ifdef CV_VERSION_EPOCH	// OpenCV 2.x
+        printf("Webcam index: %d\n", cam_index);
+//#ifdef CV_VERSION_EPOCH    // OpenCV 2.x
 //        cap = cvCaptureFromCAM(cam_index);
-//#else					// OpenCV 3.x
-		cpp_video_capture = 1;
-		cap = get_capture_webcam(cam_index);
+//#else                    // OpenCV 3.x
+        cpp_video_capture = 1;
+        cap = get_capture_webcam(cam_index);
 //#endif
     }
 
-    if(!cap) error("Couldn't connect to webcam.\n");
+    if (!cap) {
+#ifdef WIN32
+        printf("Check that you have copied file opencv_ffmpeg340_64.dll to the same directory where is darknet.exe \n");
+#endif
+        error("Couldn't connect to webcam.\n");
+    }
 
     layer l = net.layers[net.n-1];
     int j;
@@ -178,49 +184,51 @@
     probs = (float **)calloc(l.w*l.h*l.n, sizeof(float *));
     for(j = 0; j < l.w*l.h*l.n; ++j) probs[j] = (float *)calloc(l.classes, sizeof(float *));
 
-	flag_exit = 0;
+    flag_exit = 0;
 
     pthread_t fetch_thread;
     pthread_t detect_thread;
 
     fetch_in_thread(0);
-	det_img = in_img;
+    det_img = in_img;
     det_s = in_s;
 
     fetch_in_thread(0);
     detect_in_thread(0);
-	det_img = in_img;
+    det_img = in_img;
     det_s = in_s;
 
     for(j = 0; j < FRAMES/2; ++j){
         fetch_in_thread(0);
         detect_in_thread(0);
-		det_img = in_img;
+        det_img = in_img;
         det_s = in_s;
     }
 
     int count = 0;
     if(!prefix && !dont_show){
-        cvNamedWindow("Demo", CV_WINDOW_NORMAL); 
+        cvNamedWindow("Demo", CV_WINDOW_NORMAL);
         cvMoveWindow("Demo", 0, 0);
         cvResizeWindow("Demo", 1352, 1013);
     }
 
-	CvVideoWriter* output_video_writer = NULL;    // cv::VideoWriter output_video;
-	if (out_filename && !flag_exit)
-	{
-		CvSize size;
-		size.width = det_img->width, size.height = det_img->height;
+    CvVideoWriter* output_video_writer = NULL;    // cv::VideoWriter output_video;
+    if (out_filename && !flag_exit)
+    {
+        CvSize size;
+        size.width = det_img->width, size.height = det_img->height;
+        int src_fps = 25;
+        src_fps = get_stream_fps(cap, cpp_video_capture);
 
-		//const char* output_name = "test_dnn_out.avi";
-		//output_video_writer = cvCreateVideoWriter(out_filename, CV_FOURCC('H', '2', '6', '4'), 25, size, 1);
-		output_video_writer = cvCreateVideoWriter(out_filename, CV_FOURCC('D', 'I', 'V', 'X'), 25, size, 1);
-		//output_video_writer = cvCreateVideoWriter(out_filename, CV_FOURCC('M', 'J', 'P', 'G'), 25, size, 1);
-		//output_video_writer = cvCreateVideoWriter(out_filename, CV_FOURCC('M', 'P', '4', 'V'), 25, size, 1);
-		//output_video_writer = cvCreateVideoWriter(out_filename, CV_FOURCC('M', 'P', '4', '2'), 25, size, 1);
-		//output_video_writer = cvCreateVideoWriter(out_filename, CV_FOURCC('X', 'V', 'I', 'D'), 25, size, 1);
-		//output_video_writer = cvCreateVideoWriter(out_filename, CV_FOURCC('W', 'M', 'V', '2'), 25, size, 1);
-	}
+        //const char* output_name = "test_dnn_out.avi";
+        //output_video_writer = cvCreateVideoWriter(out_filename, CV_FOURCC('H', '2', '6', '4'), src_fps, size, 1);
+        output_video_writer = cvCreateVideoWriter(out_filename, CV_FOURCC('D', 'I', 'V', 'X'), src_fps, size, 1);
+        //output_video_writer = cvCreateVideoWriter(out_filename, CV_FOURCC('M', 'J', 'P', 'G'), src_fps, size, 1);
+        //output_video_writer = cvCreateVideoWriter(out_filename, CV_FOURCC('M', 'P', '4', 'V'), src_fps, size, 1);
+        //output_video_writer = cvCreateVideoWriter(out_filename, CV_FOURCC('M', 'P', '4', '2'), src_fps, size, 1);
+        //output_video_writer = cvCreateVideoWriter(out_filename, CV_FOURCC('X', 'V', 'I', 'D'), src_fps, size, 1);
+        //output_video_writer = cvCreateVideoWriter(out_filename, CV_FOURCC('W', 'M', 'V', '2'), src_fps, size, 1);
+    }
 
     double before = get_wall_time();
 
@@ -231,61 +239,66 @@
             if(pthread_create(&detect_thread, 0, detect_in_thread, 0)) error("Thread creation failed");
 
             if(!prefix){
-				if (!dont_show) {
-					show_image_cv_ipl(show_img, "Demo");
-					int c = cvWaitKey(1);
-					if (c == 10) {
-						if (frame_skip == 0) frame_skip = 60;
-						else if (frame_skip == 4) frame_skip = 0;
-						else if (frame_skip == 60) frame_skip = 4;
-						else frame_skip = 0;
-					}
-				}
+                if (!dont_show) {
+                    show_image_cv_ipl(show_img, "Demo");
+                    int c = cvWaitKey(1);
+                    if (c == 10) {
+                        if (frame_skip == 0) frame_skip = 60;
+                        else if (frame_skip == 4) frame_skip = 0;
+                        else if (frame_skip == 60) frame_skip = 4;
+                        else frame_skip = 0;
+                    }
+                    else if (c == 27 || c == 1048603) // ESC - exit (OpenCV 2.x / 3.x)
+                    {
+                        flag_exit = 1;
+                    }
+                }
             }else{
                 char buff[256];
-                sprintf(buff, "%s_%08d", prefix, count);
+                sprintf(buff, "%s_%08d.jpg", prefix, count);
+                cvSaveImage(buff, show_img, 0);
                 //save_image(disp, buff);
             }
 
-			// if you run it with param -http_port 8090  then open URL in your web-browser: http://localhost:8090
-			if (http_stream_port > 0 && show_img) {
-				//int port = 8090;
-				int port = http_stream_port;
-				int timeout = 200;
-				int jpeg_quality = 30;	// 1 - 100
-				send_mjpeg(show_img, port, timeout, jpeg_quality);
-			}
+            // if you run it with param -http_port 8090  then open URL in your web-browser: http://localhost:8090
+            if (http_stream_port > 0 && show_img) {
+                //int port = 8090;
+                int port = http_stream_port;
+                int timeout = 200;
+                int jpeg_quality = 30;    // 1 - 100
+                send_mjpeg(show_img, port, timeout, jpeg_quality);
+            }
 
-			// save video file
-			if (output_video_writer && show_img) {
-				cvWriteFrame(output_video_writer, show_img);
-				printf("\n cvWriteFrame \n");
-			}
+            // save video file
+            if (output_video_writer && show_img) {
+                cvWriteFrame(output_video_writer, show_img);
+                printf("\n cvWriteFrame \n");
+            }
 
-			cvReleaseImage(&show_img);
+            cvReleaseImage(&show_img);
 
             pthread_join(fetch_thread, 0);
             pthread_join(detect_thread, 0);
 
-			if (flag_exit == 1) break;
+            if (flag_exit == 1) break;
 
             if(delay == 0){
-				show_img = det_img;
+                show_img = det_img;
             }
-			det_img = in_img;
+            det_img = in_img;
             det_s = in_s;
         }else {
             fetch_in_thread(0);
-			det_img = in_img;
+            det_img = in_img;
             det_s = in_s;
             detect_in_thread(0);
 
-			show_img = det_img;
-			if (!dont_show) {
-				show_image_cv_ipl(show_img, "Demo");
-				cvWaitKey(1);
-			}
-			cvReleaseImage(&show_img);
+            show_img = det_img;
+            if (!dont_show) {
+                show_image_cv_ipl(show_img, "Demo");
+                cvWaitKey(1);
+            }
+            cvReleaseImage(&show_img);
         }
         --delay;
         if(delay < 0){
@@ -297,15 +310,42 @@
             before = after;
         }
     }
-	printf("input video stream closed. \n");
-	if (output_video_writer) {
-		cvReleaseVideoWriter(&output_video_writer);
-		printf("output_video_writer closed. \n");
-	}
+    printf("input video stream closed. \n");
+    if (output_video_writer) {
+        cvReleaseVideoWriter(&output_video_writer);
+        printf("output_video_writer closed. \n");
+    }
+
+    // free memory
+    cvReleaseImage(&show_img);
+    cvReleaseImage(&in_img);
+    free_image(in_s);
+
+    free(avg);
+    for (j = 0; j < FRAMES; ++j) free(predictions[j]);
+    for (j = 0; j < FRAMES; ++j) free_image(images[j]);
+
+    for (j = 0; j < l.w*l.h*l.n; ++j) free(probs[j]);
+    free(boxes);
+    free(probs);
+
+    free_ptrs(names, net.layers[net.n - 1].classes);
+
+    int i;
+    const int nsize = 8;
+    for (j = 0; j < nsize; ++j) {
+        for (i = 32; i < 127; ++i) {
+            free_image(alphabet[j][i]);
+        }
+        free(alphabet[j]);
+    }
+    free(alphabet);
+
+    free_network(net);
 }
 #else
 void demo(char *cfgfile, char *weightfile, float thresh, float hier_thresh, int cam_index, const char *filename, char **names, int classes,
-	int frame_skip, char *prefix, char *out_filename, int http_stream_port, int dont_show)
+    int frame_skip, char *prefix, char *out_filename, int http_stream_port, int dont_show, int ext_output)
 {
     fprintf(stderr, "Demo needs OpenCV for webcam images.\n");
 }

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