Method DrawFrame

camera/basic/src/main/cpp/camera_engine.cpp:155–172

* The main function rendering a frame. In our case, it is yuv to RGBA8888 * converter */

 * converter
 */
void CameraEngine::DrawFrame(void) {
  if (!cameraReady_ || !yuvReader_) return;
  AImage* image = yuvReader_->GetNextImage();
  if (!image) {
    return;
  }

  ANativeWindow_acquire(app_->window);
  ANativeWindow_Buffer buf;
  if (ANativeWindow_lock(app_->window, &buf, nullptr) < 0) {
    yuvReader_->DeleteImage(image);
    return;
  }

  yuvReader_->DisplayImage(&buf, image);
  ANativeWindow_unlockAndPost(app_->window);
  ANativeWindow_release(app_->window);
}