Improve style transfer model interface and performance.

Author: Iainmon

demos/video/chapel-webcam/main.cpp

@@ -117,6 +117,9 @@ int mirror() {
     cv::Size processed_frame_size;
 
     while (true) {
+
+        uint64_t start = cv::getTickCount();
+
         // Capture a new frame from webcam
         cap >> frame;
         if (frame.empty()) {
@@ -142,10 +145,13 @@ int mirror() {
         cv::imshow(windowName, next_frame);
 
         // Wait for 30ms or until 'q' key is pressed
-        char key = static_cast<char>(cv::waitKey(30));
+        char key = static_cast<char>(cv::waitKey(1));
         if (key == 'q' || key == 27) { // 'q' or ESC to quit
             break;
         }
+
+        double fps = cv::getTickFrequency() / (cv::getTickCount() - start);
+        std::cout << "\rcv::FPS : " << fps << "\t\r" << std::flush;
     }
 
     // Release the camera and destroy all windows

demos/video/chapel-webcam/smol.chpl

@@ -109,6 +109,7 @@ export proc getNewFrame(ref frame: [] real(32),height: int, width: int,channels:
     const dt = getTime() - lastFrame;
     const fps = 1.0 / dt;
 
+    /*
     runningSum += fps;
     frameCount += 1;
     const overallAvgFPS = runningSum / frameCount;
@@ -124,6 +125,8 @@ export proc getNewFrame(ref frame: [] real(32),height: int, width: int,channels:
     const currentWindowSize = min(frameCount, windowSize);
     const windowAvgFPS = windowSum / currentWindowSize;
     writeln("FPS: ", fps, " avg FPS: ", windowAvgFPS, "max window FPS: ", max reduce fpsBuffer);
+    */
+    // writeln("FPS: ", fps);
     lastFrame = getTime();