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8037144 Dec 22, 2015
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@pjreddie @Guanghan
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#include "cuda_runtime.h"
#include "curand.h"
#include "cublas_v2.h"
extern "C" {
#include "network.h"
#include "detection_layer.h"
#include "cost_layer.h"
#include "utils.h"
#include "parser.h"
#include "box.h"
#include "image.h"
#include <sys/time.h>
/* Change class number here */
#define CLS_NUM 2
#ifdef OPENCV
#include "opencv2/highgui/highgui.hpp"
#include "opencv2/imgproc/imgproc.hpp"
extern "C" IplImage* image_to_Ipl(image img, int w, int h, int depth, int c, int step);
extern "C" image ipl_to_image(IplImage* src);
extern "C" void convert_yolo_detections(float *predictions, int classes, int num, int square, int side, int w, int h, float thresh, float **probs, box *boxes, int only_objectness);
extern "C" void draw_yolo(image im, int num, float thresh, box *boxes, float **probs);
extern "C" char *voc_names[];
extern "C" image voc_labels[];
static float **probs;
static box *boxes;
static network net;
static image in ;
static image in_s ;
static image det ;
static image det_s;
static image disp ;
static cv::VideoCapture cap;
static cv::VideoWriter cap_out;
static float fps = 0;
static float demo_thresh = 0;
static int w, h, depth, c, step= 0;
static int MODE = -1;
void *fetch_in_thread(void *ptr)
cv::Mat frame_m;
cap >> frame_m;
IplImage frame = frame_m;
if(step == 0)
w = frame.width;
h = frame.height;
c = frame.nChannels;
depth= frame.depth;
step = frame.widthStep;
in = ipl_to_image(&frame);
in_s = resize_image(in, net.w, net.h);
return 0;
void *detect_in_thread(void *ptr)
float nms = .4;
detection_layer l = net.layers[net.n-1];
float *X =;
float *predictions = network_predict(net, X);
convert_yolo_detections(predictions, l.classes, l.n, l.sqrt, l.side, 1, 1, demo_thresh, probs, boxes, 0);
if (nms > 0) do_nms(boxes, probs, l.side*l.side*l.n, l.classes, nms);
draw_detections(det, l.side*l.side*l.n, demo_thresh, boxes, probs, voc_names, voc_labels, CLS_NUM);
if(MODE == 1)
IplImage* outputIpl= image_to_Ipl(det, w, h, depth, c, step);
cv::Mat outputMat = cv::cvarrToMat(outputIpl, true);
cvNamedWindow("image", CV_WINDOW_AUTOSIZE);
cvShowImage("image", outputIpl);
cap_out << outputMat;
return 0;
extern "C" void demo_yolo(char *cfgfile, char *weightfile, float thresh, int cam_index, char *videofile)
demo_thresh = thresh;
printf("YOLO demo\n");
net = parse_network_cfg(cfgfile);
load_weights(&net, weightfile);
set_batch_network(&net, 1);
if(cam_index != -1)
MODE = 0;
cv::VideoCapture cam(cam_index);
cap = cam;
if(!cap.isOpened()) error("Couldn't connect to webcam.\n");
MODE = 1;
printf("Video File name is: %s\n", videofile);
cv::VideoCapture videoCap(videofile);
cap = videoCap;
if(!cap.isOpened()) error("Couldn't read video file.\n");
cv::Size S = cv::Size((int)videoCap.get(CV_CAP_PROP_FRAME_WIDTH), (int)videoCap.get(CV_CAP_PROP_FRAME_HEIGHT));
cv::VideoWriter outputVideo("out.avi", CV_FOURCC('D','I','V','X'), videoCap.get(CV_CAP_PROP_FPS), S, true);
if(!outputVideo.isOpened()) error("Couldn't write video file.\n");
cap_out = outputVideo;
detection_layer l = net.layers[net.n-1];
int j;
boxes = (box *)calloc(l.side*l.side*l.n, sizeof(box));
probs = (float **)calloc(l.side*l.side*l.n, sizeof(float *));
for(j = 0; j < l.side*l.side*l.n; ++j) probs[j] = (float *)calloc(l.classes, sizeof(float *));
pthread_t fetch_thread;
pthread_t detect_thread;
det = in;
det_s = in_s;
disp = det;
det = in;
det_s = in_s;
struct timeval tval_before, tval_after, tval_result;
gettimeofday(&tval_before, NULL);
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");
show_image(disp, "YOLO");
pthread_join(fetch_thread, 0);
pthread_join(detect_thread, 0);
disp = det;
det = in;
det_s = in_s;
gettimeofday(&tval_after, NULL);
timersub(&tval_after, &tval_before, &tval_result);
float curr = 1000000.f/((long int)tval_result.tv_usec);
fps = .9*fps + .1*curr;
extern "C" void demo_yolo(char *cfgfile, char *weightfile, float thresh, int cam_index){
fprintf(stderr, "YOLO demo needs OpenCV for webcam images.\n");