Fix crash caused by screen capturer or mouse controller init failed on Linux and MacOS

src/device_controller/mouse/linux/mouse_controller.cpp

@@ -13,6 +13,7 @@ int MouseController::Init(int screen_width, int screen_height) {
   uinput_fd_ = open("/dev/uinput", O_WRONLY | O_NONBLOCK);
   if (uinput_fd_ < 0) {
     LOG_ERROR("Cannot open device: /dev/uinput");
+    return -1;
   }
 
   ioctl(uinput_fd_, UI_SET_EVBIT, EV_KEY);
@@ -35,14 +36,17 @@ int MouseController::Init(int screen_width, int screen_height) {
   uidev.absmin[ABS_Y] = 0;
   uidev.absmax[ABS_Y] = screen_height_;
 
-  write(uinput_fd_, &uidev, sizeof(uidev));
+  int res_uidev = write(uinput_fd_, &uidev, sizeof(uidev));
   ioctl(uinput_fd_, UI_DEV_CREATE);
   return 0;
 }
 
 int MouseController::Destroy() {
+  if (uinput_fd_) {
     ioctl(uinput_fd_, UI_DEV_DESTROY);
     close(uinput_fd_);
+  }
+  return 0;
 }
 
 int MouseController::SendCommand(RemoteAction remote_action) {
@@ -71,6 +75,7 @@ int MouseController::SendCommand(RemoteAction remote_action) {
 }
 
 void MouseController::SimulateKeyDown(int fd, int kval) {
+  int res_ev = 0;
   struct input_event event;
   memset(&event, 0, sizeof(event));
   gettimeofday(&event.time, 0);
@@ -78,15 +83,16 @@ void MouseController::SimulateKeyDown(int fd, int kval) {
   event.type = EV_KEY;
   event.value = 1;
   event.code = kval;
-  write(fd, &event, sizeof(event));
+  res_ev = write(fd, &event, sizeof(event));
 
   event.type = EV_SYN;
   event.value = 0;
   event.code = SYN_REPORT;
-  write(fd, &event, sizeof(event));
+  res_ev = write(fd, &event, sizeof(event));
 }
 
 void MouseController::SimulateKeyUp(int fd, int kval) {
+  int res_ev = 0;
   struct input_event event;
   memset(&event, 0, sizeof(event));
   gettimeofday(&event.time, 0);
@@ -94,12 +100,12 @@ void MouseController::SimulateKeyUp(int fd, int kval) {
   event.type = EV_KEY;
   event.value = 0;
   event.code = kval;
-  write(fd, &event, sizeof(event));
+  res_ev = write(fd, &event, sizeof(event));
 
   event.type = EV_SYN;
   event.value = 0;
   event.code = SYN_REPORT;
-  write(fd, &event, sizeof(event));
+  res_ev = write(fd, &event, sizeof(event));
 }
 
 void MouseController::SetMousePosition(int fd, int x, int y) {

src/gui/main.cpp

@@ -253,7 +253,9 @@ void ServerReceiveDataBuffer(const char *data, size_t size, const char *user_id,
   //           << remote_action.m.flag << " " << remote_action.m.x << " "
   //           << remote_action.m.y << std::endl;
 #if MOUSE_CONTROL
+  if (mouse_controller) {
     mouse_controller->SendCommand(remote_action);
+  }
 #endif
 }
 
@@ -521,7 +523,7 @@ int main(int argc, char *argv[]) {
           rect.right = screen_w;
           rect.bottom = screen_h;
 
-          screen_capturer->Init(
+          int screen_capturer_init_ret = screen_capturer->Init(
               rect, 60,
               [](unsigned char *data, int size, int width, int height) -> void {
                 auto now_time = std::chrono::high_resolution_clock::now();
@@ -536,14 +538,24 @@ int main(int argc, char *argv[]) {
                 }
               });
 
+          if (0 == screen_capturer_init_ret) {
             screen_capturer->Start();
+          } else {
+            screen_capturer->Destroy();
+            screen_capturer = nullptr;
+          }
 
           // Mouse control
           device_controller_factory = new DeviceControllerFactory();
           mouse_controller =
               (MouseController *)device_controller_factory->Create(
                   DeviceControllerFactory::Device::Mouse);
+          int mouse_controller_init_ret =
               mouse_controller->Init(screen_w, screen_h);
+          if (0 != mouse_controller_init_ret) {
+            mouse_controller->Destroy();
+            mouse_controller = nullptr;
+          }
         }
       },
       screen_w, screen_h);
@@ -754,7 +766,13 @@ int main(int argc, char *argv[]) {
   SDL_CloseAudioDevice(output_dev);
   SDL_CloseAudioDevice(input_dev);
 
+  if (screen_capturer) {
+    screen_capturer->Destroy();
+  }
+
+  if (mouse_controller) {
     mouse_controller->Destroy();
+  }
 
   ImGui_ImplSDLRenderer2_Shutdown();
   ImGui_ImplSDL2_Shutdown();

src/screen_capturer/linux/screen_capturer_x11.cpp

@@ -91,12 +91,15 @@ int ScreenCapturerX11::Init(const RECORD_DESKTOP_RECT &rect, const int fps,
       pFrame_->width, pFrame_->height, pCodecCtx_->pix_fmt, pFrameNv12_->width,
       pFrameNv12_->height, AV_PIX_FMT_NV12, SWS_BICUBIC, NULL, NULL, NULL);
 
+  inited_ = true;
+
   return 0;
 }
 
 int ScreenCapturerX11::Destroy() {
-  if (capture_thread_->joinable()) {
+  if (inited_ && capture_thread_->joinable()) {
     capture_thread_->join();
+    inited_ = false;
   }
 
   return 0;

src/screen_capturer/linux/screen_capturer_x11.h

@@ -61,6 +61,8 @@ class ScreenCapturerX11 : public ScreenCapturer {
   int videoindex_ = 0;
   int got_picture_ = 0;
   int fps_ = 0;
+  bool inited_ = false;
+
   // ffmpeg
   AVFormatContext *pFormatCtx_ = nullptr;
   AVCodecContext *pCodecCtx_ = nullptr;

src/screen_capturer/macosx/screen_capturer_avf.cpp

@@ -92,12 +92,15 @@ int ScreenCapturerAvf::Init(const RECORD_DESKTOP_RECT &rect, const int fps,
       pFrame_->width, pFrame_->height, pCodecCtx_->pix_fmt, pFrameNv12_->width,
       pFrameNv12_->height, AV_PIX_FMT_NV12, SWS_BICUBIC, NULL, NULL, NULL);
 
+  inited_ = true;
+
   return 0;
 }
 
 int ScreenCapturerAvf::Destroy() {
-  if (capture_thread_->joinable()) {
+  if (inited_ && capture_thread_->joinable()) {
     capture_thread_->join();
+    inited_ = false;
   }
 
   return 0;

src/screen_capturer/macosx/screen_capturer_avf.h

@@ -66,6 +66,8 @@ class ScreenCapturerAvf : public ScreenCapturer {
   int i_ = 0;
   int videoindex_ = 0;
   int got_picture_ = 0;
+  bool inited_ = false;
+
   // ffmpeg
   AVFormatContext *pFormatCtx_ = nullptr;
   AVCodecContext *pCodecCtx_ = nullptr;