Plugin/patch for playing ppts

Hi,

we are using elgg-1.8.16. We are looking for the plugin that works similar to slideshare (free plugin). We want to upload ppts on the site and we want it to be displayed it only and users should not be able to download it. Also, it should autolplay the ppts and should also support next / previous  button. Any help in this regard is welcome.

 

Thanks..

pankaj