Signed-off-by: Rémi Duraffort <ivoire@videolan.org>

Pointed-out-by: 김정은 <sunqueen@paran.com>

This requires a bleeding edge liblive555 - not tested.

Modified by Jean-Baptiste Kempf, to fit option style
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

All members that where previously part of struct hls_thread_s have been
moved to stream_sys_t. The purpose of having this structure and vlc_object_t
is no longer needed.

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Signed-off-by: Laurent Aimar <fenrir@videolan.org>

Rename p_sys->download.current and p_sys->playback.current to
p_sys->download.stream and p_sys->playback.stream.

Playback of live streams with HLS started at index 0 from the downloaded playlists. For
live streams it is more natural to be closer to the end of the playlist, but not within
the last 3 segments of the stream.

The playback stalling warning was printed too often. Only print this message when
playback is in real danger and check only on segment boundaries.

Then again, many developers have Christian first names (most noticeably
"Christophe").

This should be installed locally as it can't be crosscompiled. Recommendation: Homebrew

Cleanup hls_Thread().

Check only for live streams the member p_sys->playlist.wakeup.

Cleanup hls_thread_t and stream_sys_t structs:
- duplicate members
- rename hls_playlist_t to hls_playlist_s
- move download members to stream_sys_t inside a hls_download_s struct
- check for p_sys->thread is no longer needed in segment_Seek()

Rearrange hls_Thread logic with live playback in mind. In case all segments have been
downloaded, then make sure that reloading the playlist file happens before downloading
the next segment. This is also true when it is time to reload the playlist.

Print a warning if the download segment counter and playback segment counter are
less then 3 segments apart. Print and error if they are the same.

no functional changes

Use the sequence number of the segment in msg_* instead of the array index.

Make error path simpler.

Matching #EXT-* keywords was off by one for several.

Add extensive debugging information for detecting issues in HLS live streams.

Reload .m3u8 playlist from the server and try merging its result with the current
available information. The array of segments for the current stream is only appended
and does currently not shrink. Shrinking the segment list will be dealt with in another patch.