It is impossible to make an embroidery design using just a common graphics editor (Photoshop for example), so jpeg to dst conversion is not that easy to achieve. This is due the fact that embroidery design files are special vector based images with instructions for the stitching machine.
However, an experienced graphics designer might be able to create embroidery design from some image. This is done with usually expensive digitizer software. Some embroidery software can also possess basic digitizing function that can convert raster image to embroidery, but that's usually far from perfect.