GitLab

Won't work for many things (only those for which metadata can be gotten during initialization).

Processing is done asynchronously, use playlist_PreparseEnqueue to add an item to the queue.

 * sub ->subtitle : converted sub.c to a 'real' demux2.
 * input.c: added basic multi-input support for subtitle.
 * avi, mp4: don't exit anymore when no es selected.

 (becarefull, it's just if you can seek or not, and not if you have to
 display the progress bar, for thet last you have to check if "position"
 value get != 0.0 )
       - added "audio-delay" and "spu-delay" object variables to delay
 audio/spu to the video. They can be changed on the fly (untested).
       - renamed INPUT__GET/SET_SUBDELAY into
 INPUT_SET_SPU_DELAY and added INPUT_SET_AUDIO_DELAY
 (wrapper to "audio-delay" and "spu-delay")
 - readded INPUT_ADD/GET_INFO/INPUT_SET_NAME. Becarefull to not over-use
them, a demuxer should export DEMUX_GET_META and not using them.