Chapel from C++ mirror working.

Author: Iainmon

demos/video/chapel-webcam/lib/smol.h

@@ -6,3 +6,7 @@ void chpl__init_smol(int64_t _ln,
 int64_t square(int64_t x);
 int64_t sumArray(chpl_external_array * a);
 void printArray(chpl_external_array * a);
+chpl_external_array getNewFrame(chpl_external_array * frame,
+                                int64_t height,
+                                int64_t width,
+                                int64_t channels);

demos/video/chapel-webcam/main.cpp

@@ -5,6 +5,58 @@
 #include <iostream>
 
 
+
+cv::Mat new_frame(cv::Mat &frame) {
+    cv::Mat rgb_frame;
+    cv::cvtColor(frame, rgb_frame, cv::COLOR_BGR2RGB);
+    std::cout << "Frame size: " << rgb_frame.size() << std::endl;
+
+    // cv::MatSize size = rgb_frame.size;
+    // std::cout << "x " << size[0] << " y " << size[1] << " channels " << rgb_frame.dims << std::endl;
+    int64_t width = rgb_frame.cols;
+    int64_t height = rgb_frame.rows;
+    int64_t channels = rgb_frame.channels();
+    int64_t pixels = rgb_frame.total();
+    int64_t size = pixels * channels;
+
+    chpl_external_array frame_data_ptr = chpl_make_external_array_ptr(rgb_frame.data, size);
+    chpl_external_array new_frame_array = getNewFrame(&frame_data_ptr, width, height, channels);
+    chpl_free_external_array(frame_data_ptr);
+
+    cv::Mat new_rgb_frame(height, width, CV_8UC3,new_frame_array.elts);
+    cv::cvtColor(new_rgb_frame, new_rgb_frame, cv::COLOR_RGB2BGR);
+
+    // chpl_free_external_array(new_frame_array);
+
+    return new_rgb_frame;
+
+    // std::cout << "Width: " << width << ", Height: " << height << ", Channels: " << channels << ", Size: " << size << std::endl;
+
+
+
+    // chpl_external_array frame_data_ptr = chpl_make_external_array_ptr(rgb_frame.data, );
+}
+
+
+/*
+void new_frame(cv::Mat &frame) {
+    cv::Mat rgb_frame;
+    cv::cvtColor(frame, rgb_frame, cv::COLOR_BGR2RGB);
+    std::cout << "Frame size: " << rgb_frame.size() << std::endl;
+
+    // cv::MatSize size = rgb_frame.size;
+    // std::cout << "x " << size[0] << " y " << size[1] << " channels " << rgb_frame.dims << std::endl;
+    int64_t width = rgb_frame.cols;
+    int64_t height = rgb_frame.rows;
+    int64_t channels = rgb_frame.channels();
+    int64_t size = rgb_frame.total() * channels;
+
+    std::cout << "Width: " << width << ", Height: " << height << ", Channels: " << channels << ", Size: " << size << std::endl;
+
+    // chpl_external_array frame_data_ptr = chpl_make_external_array_ptr(rgb_frame.data, );
+}*/
+
+
 int mirror() {
     cv::VideoCapture cap(0);
     if (!cap.isOpened()) {
@@ -23,9 +75,9 @@ int mirror() {
             std::cerr << "Error: Empty frame captured.\n";
             break;
         }
-
+        cv::Mat next_frame = new_frame(frame);
         // Display the captured frame
-        cv::imshow(windowName, frame);
+        cv::imshow(windowName, next_frame);
 
         // Wait for 30ms or until 'q' key is pressed
         char key = static_cast<char>(cv::waitKey(30));
@@ -40,7 +92,6 @@ int mirror() {
     return 0;
 }
 
-// int mirror() { return 0; }
 
 int main(int argc, char* argv[]) {
     chpl_library_init(argc, argv);

demos/video/chapel-webcam/smol.chpl

@@ -15,3 +15,8 @@ export proc printArray(a: [] int): void {
     writeln(a);
 }
 
+
+export proc getNewFrame(frame: [] uint(8),height: int, width: int,channels: int): [] uint(8) {
+    const ret = frame;
+    return ret;
+}