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mpv/demux
wm4 1cb9e7efb8 stream, demux: redo origin policy thing
mpv has a very weak and very annoying policy that determines whether a
playlist should be used or not. For example, if you play a remote
playlist, you usually don't want it to be able to read local filesystem
entries. (Although for a media player the impact is small I guess.)

It's weak and annoying as in that it does not prevent certain cases
which could be interpreted as bad in some cases, such as allowing
playlists on the local filesystem to reference remote URLs. It probably
barely makes sense, but we just want to exclude some other "definitely
not a good idea" things, all while playlists generally just work, so
whatever.

The policy is:
- from the command line anything is played
- local playlists can reference anything except "unsafe" streams
  ("unsafe" means special stream inputs like libavfilter graphs)
- remote playlists can reference only remote URLs
- things like "memory://" and archives are "transparent" to this

This commit does... something. It replaces the weird stream flags with a
slightly clearer "origin" value, which is now consequently passed down
and used everywhere. It fixes some deviations from the described policy.

I wanted to force archives to reference only content within them, but
this would probably have been more complicated (or required different
abstractions), and I'm too lazy to figure it out, so archives are now
"transparent" (playlists within archives behave the same outside).

There may be a lot of bugs in this.

This is unfortunately a very noisy commit because:
- every stream open call now needs to pass the origin
- so does every demuxer open call (=> params param. gets mandatory)
- most stream were changed to provide the "origin" value
- the origin value needed to be passed along in a lot of places
- I was too lazy to split the commit

Fixes: #7274
2019-12-20 13:00:39 +01:00
..
cache.c demux: add a on-disk cache 2019-09-19 20:37:05 +02:00
cache.h demux: add a on-disk cache 2019-09-19 20:37:05 +02:00
codec_tags.c codec_tags: fix wrong buffer size 2019-07-03 17:47:24 +03:00
codec_tags.h Relicense some non-MPlayer source files to LGPL 2.1 or later 2016-01-19 18:36:06 +01:00
cue.c demux: support cue sheets longer than 100 minutes 2019-04-01 23:39:08 +02:00
cue.h Relicense some non-MPlayer source files to LGPL 2.1 or later 2016-01-19 18:36:06 +01:00
demux_cue.c stream, demux: redo origin policy thing 2019-12-20 13:00:39 +01:00
demux_disc.c stream, demux: redo origin policy thing 2019-12-20 13:00:39 +01:00
demux_edl.c stream, demux: redo origin policy thing 2019-12-20 13:00:39 +01:00
demux_lavf.c demux_lavf: export demuxer_id for more formats which have it 2019-12-03 21:15:40 +01:00
demux_libarchive.c stream, demux: redo origin policy thing 2019-12-20 13:00:39 +01:00
demux_mf.c stream, demux: redo origin policy thing 2019-12-20 13:00:39 +01:00
demux_mkv_timeline.c stream, demux: redo origin policy thing 2019-12-20 13:00:39 +01:00
demux_mkv.c demux: do not make up demuxer_id 2019-12-03 21:04:53 +01:00
demux_null.c demux_null: mark as seekable 2018-01-06 14:42:22 -08:00
demux_playlist.c stream, demux: redo origin policy thing 2019-12-20 13:00:39 +01:00
demux_raw.c stream: replace STREAM_CTRL_GET_SIZE with a proper entrypoint 2019-11-07 22:53:13 +01:00
demux_timeline.c stream, demux: redo origin policy thing 2019-12-20 13:00:39 +01:00
demux.c stream, demux: redo origin policy thing 2019-12-20 13:00:39 +01:00
demux.h stream, demux: redo origin policy thing 2019-12-20 13:00:39 +01:00
ebml.c demux_mkv, stream: attempt to improve behavior in unseekable streams 2019-11-14 12:59:14 +01:00
ebml.h demux_mkv: rewrite packet reading to avoid 1 memcpy() 2017-11-05 18:13:34 +01:00
matroska.h ebml, matroska.h: change license to LGPL 2017-04-21 13:34:10 +02:00
packet.c packet: fix theoretical UB if called on "empty" packets 2019-09-19 20:37:05 +02:00
packet.h demux: add a on-disk cache 2019-09-19 20:37:05 +02:00
stheader.h video, demux: rip out unused spherical metadata code 2019-10-17 22:49:26 +02:00
timeline.c stream, demux: redo origin policy thing 2019-12-20 13:00:39 +01:00
timeline.h stream, demux: redo origin policy thing 2019-12-20 13:00:39 +01:00