gregkorossy

function Semaphore(max) {
  var counter = 0;
  var waiting = [];
  
  var take = function() {
    if (waiting.length > 0 && counter < max){
      counter++;
      let promise = waiting.shift();
      promise.resolve();
    }

gregkorossy

/**
 * <p>Returns the supplied {@link com.google.android.gms.vision.CameraSource}'s {@link android.hardware.Camera} instance that is being used.</p>
 * <p>
 * If you want to set any of the camera parameters, here's an example that sets the focus mode to continuous auto focus and enables the flashlight:
 * <blockquote>
 * <code>
 * Camera.Parameters params = camera.getParameters();
 * params.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);
 * params.setFlashMode(Camera.Parameters.FLASH_MODE_TORCH);
 * camera.setParameters(params);

gregkorossy

/*
 * IF YOU WANT TO JUST ACCESS THE CAMERA INSTANCE SO THAT YOU CAN SET ANY OF THE PARAMETERS, VISIT THE FOLLOWING LINK:
 * https://gist.github.com/Gericop/364dd12b105fdc28a0b6
 */
 
/**
 * Custom annotation to allow only valid focus modes.
 */
 @StringDef({
    Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE,