Version initiale du logiciel. Développement commencé le 06/01/2026, en reprenant certaines parties/idées de miniDart, que j'ai écrit quelques années plus tôt

engine.cxx

@@ -0,0 +1,137 @@
+/*
+ * engine.cxx, now included in digital modulations, was initialy a file from miniDart project
+ * Author : Eric Bachard  / lundi 3 octobre 2016, 14:35:03 (UTC+0200)
+ * This file is under GPL v2 License
+ * See : http://www.gnu.org/licenses/gpl-2.0.html
+ */
+
+
+#include "SDL3/SDL.h"                  // We use SDL3
+
+#include "imgui_impl_sdl3.h"
+#include "imgui_impl_opengl3.h"
+#include "engine.h"                  // class Engine
+#include "application.h"             // WINDOW_WIDTH, WINDOW_HEIGHT,
+
+#include <GL/gl.h>                     // OpenGL
+
+#include "digital_modulation_fr.hpp"
+
+// TODO later : kept for good reasons (the fact is we currently do not cross-compile for MS Windows)
+#ifndef NATIVE_BUILD
+#define NATIVE_BUILD
+#endif
+
+using std::cout;
+using std::endl;
+
+void Engine::sdl_application_abort(const char * msg)
+{
+    std::cout << SDL_GetError() << std::endl;
+    SDL_Quit();
+    exit (-1);
+}
+
+Engine::Engine()
+{
+    int anErr = init_SDL();
+
+    if (anErr != 0)
+    {
+        std::cerr << "Cannot initialize SDL or OpenGL. Exiting" << std::endl;
+        SDL_Quit();
+    }
+}
+
+
+Engine::~Engine()
+{
+    SDL_GL_DestroyContext(getGL_Context());
+    SDL_DestroyWindow(getWindow());
+    window = nullptr;
+}
+
+int Engine::init_SDL()
+{
+    std::cout << "\n";
+    SDL_Log("AVX     %s\n", SDL_HasAVX()? "detected" : "not detected");
+    SDL_Log("AVX2    %s\n", SDL_HasAVX2()? "detected" : "not detected");
+    SDL_Log("AVX512F %s\n", SDL_HasAVX512F()? "detected" : "not detected");
+    std::cout << "\n";
+
+    // ericb 2022 08 19
+    // source :
+    // https://answers.opencv.org/question/120699/can-opencv-310-be-set-to-capture-an-rtsp-stream-over-udp/
+    //   setenv("OPENCV_FFMPEG_CAPTURE_OPTIONS", "rtsp_transport;udp", 1);
+
+#ifdef NATIVE_BUILD
+    // https://github.com/libsdl-org/SDL/issues/2917
+    putenv((char *)"SDL_PULSEAUDIO_INCLUDE_MONITORS=true");
+#endif
+    // https://www.gog.com/forum/thimbleweed_park/linux_unable_to_init_sdl_mixer_alsa_couldnt_open_audio_device_no_such_device
+    // https://wiki.libsdl.org/FAQUsingSDL
+#ifndef NATIVE_BUILD
+    SDL_setenv("SDL_AUDIODRIVER", "DirectSound", true);
+    putenv((char *)"SDL_AUDIODRIVER=DirectSound");
+#else
+    // SDL_setenv("SDL_AUDIODRIVER", "alsa", true);
+    putenv((char *)"SDL_AUDIODRIVER=alsa");
+//    putenv((char *)"SDL_AUDIODEV=pulse");
+#endif
+
+    // --------------------- SDL INIT ---------------------
+    // about issues between OpenGL 3.3. and OpenGL 3.0 (only Linux concerned)
+    // https://discourse.libsdl.org/t/confused-about-what-opengl-context-is-being-used-with-sdl/22860
+    // avoid using compatiblity profile
+
+    if (!SDL_Init(SDL_INIT_VIDEO))
+    {
+        fprintf(stdout, "SDL init error: %s\n", SDL_GetError());
+        return -1;
+    }
+    //const char* glsl_version = "#version 130";
+    SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
+    SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
+    SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 3);
+    SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
+
+    setWindow((SDL_Window*)SDL_CreateWindow(  MAIN_SDL3_WINDOW_NAME,
+                                            DEFAULT_SDL_WINDOW_WIDTH,
+                                            DEFAULT_SDL_WINDOW_HEIGHT,
+                                            SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE
+                                         ));
+
+    // check whether the SDL3 window exists
+    if (getWindow() == nullptr)
+        sdl_application_abort("Problem creating the SDL window.\n");
+    else
+        std::cout << "SDL3 Window created " << "\n";
+
+    gl_context = SDL_GL_CreateContext(getWindow());
+
+    std::cout << "GL_Context   :  " << getGL_Context() << "\n";
+
+    if (getGL_Context() == nullptr)
+        sdl_application_abort("Problem creating GL context.\n");
+    else
+        std::cout << "GL Context created \n" << "\n";
+
+    SDL_GL_MakeCurrent(getWindow(), getGL_Context());
+
+    // 1 == enable VSync ; 0 == disable VSync
+    #define USE_VSYNC
+    #ifdef USE_VSYNC
+    SDL_GL_SetSwapInterval(1);
+    #else
+    SDL_GL_SetSwapInterval(0);
+    #endif
+
+    std::cout << "\nImGui version = " <<  IMGUI_VERSION  << "\n\n";
+
+    return EXIT_SUCCESS;
+}
+
+
+
+
+