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https://github.com/mpv-player/mpv
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1cb9e7efb8
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
64 lines
1.9 KiB
C
64 lines
1.9 KiB
C
#ifndef MP_TIMELINE_H_
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#define MP_TIMELINE_H_
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// Single segment in a timeline.
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struct timeline_part {
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// (end time must match with start time of the next part)
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double start, end;
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double source_start;
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char *url;
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struct demuxer *source;
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};
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// Timeline formed by a single demuxer. Multiple pars are used to get tracks
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// that require a separate opened demuxer, such as separate audio tracks. (For
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// example, for ordered chapters there is only a single par, because all streams
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// demux from the same file at a given time, while for DASH-style video+audio,
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// each track would have its own timeline.)
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// Note that demuxer instances must not be shared across timeline_pars. This
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// would conflict in demux_timeline.c.
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// "par" is short for parallel stream.
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struct timeline_par {
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bstr init_fragment;
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bool dash, no_clip;
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// Segments to play, ordered by time.
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struct timeline_part *parts;
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int num_parts;
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// Which source defines the overall track list (over the full timeline).
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struct demuxer *track_layout;
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};
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struct timeline {
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struct mpv_global *global;
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struct mp_log *log;
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struct mp_cancel *cancel;
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bool is_network, is_streaming;
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int stream_origin;
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const char *format;
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// main source, and all other sources (this usually only has special meaning
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// for memory management; mostly compensates for the lack of refcounting)
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struct demuxer *demuxer;
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struct demuxer **sources;
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int num_sources;
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// Description of timeline ranges, possibly multiple parallel ones.
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struct timeline_par **pars;
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int num_pars;
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struct demux_chapter *chapters;
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int num_chapters;
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// global tags, attachments, editions
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struct demuxer *meta;
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};
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struct timeline *timeline_load(struct mpv_global *global, struct mp_log *log,
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struct demuxer *demuxer);
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void timeline_destroy(struct timeline *tl);
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#endif
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