Différences

Ci-dessous, les différences entre deux révisions de la page.

--- diy:projets:chromakey [2018/06/25 09:05] – [Sources du projet] sdurand
+++ diy:projets:chromakey [2018/07/02 09:35] (Version actuelle) – [Sources du projet] sdurand
@@ Ligne 447: / Ligne 447: @@
 === "Récepteur" ===
+<code C++>
+#include <iostream>
+#include <chrono>
+#include <opencv2/opencv.hpp>
+// WIDTH, HEIGHT and NUMBER_OF_FRAMES should always be set to the same value as in the transmitter
+#define WIDTH 1280
+#define HEIGHT 720
+// Maximum size of the received frame
+// In theory, if jpeg doesn't compress the image at all, it could be larger than that because of the format overhead
+// I'm not sure it can ever happen, so, as this program should not be used for critical stuff (it really should not), I'm just gonna assume it won't happen
+#define FRAME_SIZE WIDTH*HEIGHT*3
+#define NUMBER_OF_FRAMES 150
+#define ALL_GOOD 0
+int main(int argc, char **argv) {
+	// Actual size of the received frame
+	unsigned int size;
+	uchar buffer[FRAME_SIZE];
+	cv::Mat frame;
+	for(int frame_count = 0; frame_count < NUMBER_OF_FRAMES; frame_count++) {
+		// Reading the encoded image from stdin
+		// unsigned int and uchar size are the same on ARM and 64 bits regular computer
+		fread(&size, sizeof(unsigned int), 1, stdin);
+		fread(buffer, sizeof(uchar), size, stdin);
+		std::vector<uchar> data(buffer, buffer+size);
+		// Decoding the received frame
+		frame = cv::imdecode(cv::Mat(data), cv::IMREAD_UNCHANGED);
+		// Displaying the received frame
+		cv::imshow("frame", frame);
+		// This wait is mandatory for the image to actually display
+		cv::waitKey(1);
+	}
+	return ALL_GOOD;
+}
+</code>
 ----
-//Auteur: Sylvain D//
+//Auteur: S. Durand//