Support for Drupal 7 is ending on 5 January 2025—it’s time to migrate to Drupal 10! Learn about the many benefits of Drupal 10 and find migration tools in our resource center.
Since you are using Jcrop, and Jcrop can handle aspect ratio:
http://deepliquid.com/content/Jcrop_Manual.html#Setting_Options
It's a small change to enable aspect ratio (through a settings in the config)