Feedback global system

Implement a system to:

• Alert the user of critical errors (cannot play file). Should be blocking.
• Ask the user a question
  • Are you sure?
  • Try to Fix index of avi?
  • Overwrite File ?
• Inform the user, without disturbing him. (Buffering stream). This might require a displaytime or something. Because how do we know how long this information should be displayed? Also think of buffering 0-100%
• present a user/passwd dialog when we get an authentication failure on a stream.

Implementation ideas:

• via variables and callbacks. How to give answers back ?

• via p_intf->pf_* functions.

• Implementation and reaction depend on interface, of course.