fix: crash when callback is uninitialised

src/cli/main.cpp

@@ -19,8 +19,6 @@ int main(int argc, char* argv[]) {
 	try {
 		CLI11_PARSE(app, argc, argv);
 
-		printf("Hi\n");
-
 		cli::run(inputs, outputs, configPaths, preview, verbose);
 
 		return 0;

src/common/rendering.cpp

@@ -7,7 +7,7 @@
 void c_rendering::render_videos() {
 	if (!queue.empty()) {
 		current_render = queue.front();
-		rendering.progress_callback();
+		run_callbacks();
 
 		try {
 			current_render->render();
@@ -19,7 +19,7 @@ void c_rendering::render_videos() {
 		// finished rendering, delete
 		queue.erase(queue.begin());
 		current_render = nullptr;
-		rendering.progress_callback();
+		run_callbacks();
 
 		renders_queued = !queue.empty();
 	}
@@ -287,7 +287,7 @@ bool c_render::do_render(s_render_commands render_commands) {
 							status.start_time = std::chrono::high_resolution_clock::now();
 						}
 
-						rendering.progress_callback();
+						rendering.run_callbacks();
 					}
 
 					line.clear();

src/common/rendering.h

@@ -77,7 +77,7 @@ class c_rendering {
 public:
 	std::vector<std::shared_ptr<c_render>> queue;
 	std::shared_ptr<c_render> current_render;
-	std::function<void()> progress_callback;
+	std::optional<std::function<void()>> progress_callback;
 	bool renders_queued;
 
 public:
@@ -86,6 +86,11 @@ class c_rendering {
 	void queue_render(std::shared_ptr<c_render> render);
 
 	void stop_rendering();
+
+	void run_callbacks() {
+		if (progress_callback)
+			(*progress_callback)();
+	}
 };
 
 inline c_rendering rendering;