Video::PlaybackMachine::PlayerBackEnd -- interface for different kinds of players
This file defines the interface for PlayerBackEnds, which provide the actual playback ability of the Playback Machine. A BackEnd must be able to play movies, show stills, and play music files.
The PlayerBackEnd should implement the initialize(),
play_movie(),
play_still(),
play_music(),
and stop() methods for playing content.
It should also implement check_event() and get_status().
A movie_length() function is optional but strongly suggested.
new( name => $name, config => $config )
Creates a PlayerBackEnd object. The config object will come from the appropriate configuration file and will be a (sub)class of AppConfig.
initialize()
Do whatever initialization is required to show movies.
play_movie( $movie , $offset )
Start playing $movie $offset seconds after the beginning. Return true if the movie played successfully, or return false if there was an error.
get_error()
Returns some kind of error message or code indicating the last error which happened.
movie_length( $movie )
Returns the length of the movie in seconds, ceilinged.
