Commit Graph

810 Commits

Author SHA1 Message Date
wm4 a4eb8f75c0 sub: add an option to filter subtitles by regex
Works as ad-filter. I had some more plans, for example replacing
matching text with different text, but for now it's dropping matches
only. There's a big warning in the manpage that I might change
semantics. For example, I might turn it into a primitive sed.

In a sane world, you'd probably write a simple script that processes
downloaded subtitles before giving them to mpv, and avoid all this
complexity. But we don't live in a sane world, and the sooner you learn
this, the happier you will be. (But I also want to run this on muxed
subtitles.)

This is pretty straightforward. We use POSIX regexes, which are readily
available without additional pain or dependencies. This also means it's
(apparently) not available on win32 (MinGW). The regex list is because I
hate big monolithic regexes, and this makes it slightly better.

Very superficially tested.
2020-02-16 02:07:24 +01:00
wm4 0b35b4c917 sub: make filter_sdh a "proper" filter, allow runtime changes
Until now, filter_sdh was simply a function that was called by sd_ass
directly (if enabled).

I want to add another filter, so it's time to turn this into a somewhat
more general subtitle filtering infrastructure.

I pondered whether to reuse the audio/video filtering stuff - but better
not. Also, since subtitles are horrible and tend to refuse proper
abstraction, it's still messed into sd_ass, instead of working on the
dec_sub.c level. Actually mpv used to have subtitle "filters" and even
made subtitle converters part of it, but it was fairly horrible, so
don't do that again.

In addition, make runtime changes possible. Since this was supposed to
be a quick hack, I just decided to put all subtitle filter options into
a separate option group (=> simpler change notification), to manually
push the change through the playloop (like it was sort of before for OSD
options), and to recreate the sub filter chain completely in every
change. Should be good enough.

One strangeness is that due to prefetching and such, most subtitle
packets (or those some time ahead) are actually done filtering when we
change, so the user still needs to manually seek to actually refresh
everything. And since subtitle data is usually cached in ASS_Track (for
other terrible but user-friendly reasons), we also must clear the
subtitle data, but of course only on seek, since otherwise all subtitles
would just disappear. What a fucking mess, but such is life. We could
trigger a "refresh seek" to make this more automatic, but I don't feel
like it currently.

This is slightly inefficient (lots of allocations and copying), but I
decided that it doesn't matter. Could matter slightly for crazy ASS
subtitles that render with thousands of events.

Not very well tested. Still seems to work, but I didn't have many test
cases.
2020-02-16 02:07:24 +01:00
der richter 1881698543 mac: always include the macOS config when cocoa is available
the macOS config was only used in cocoa-cb before and only included when
it was available. since this config is meant for general macOS options
and backend independent options we include it when cocoa is available.
one of the options is already used in the old cocoa backend, which broke
using it when build without swift or cocoa-cb support.

Fixes #7449
2020-02-09 11:45:55 +01:00
wm4 e9fc53a10b player: add ab-loop-count option/property
As requested I guess. It behaves quite similar to the --loop* options.

Not quite happy with the idea that 1) the option is mutated on each
operation (but at least it's consistent with --loop* and doesn't require
more properties), and 2) the ab-loop command will do nothing once all
loop iterations are done. As a concession, the OSD shows something about
"disabled".

Fixes: #7360
2020-02-08 15:01:33 +01:00
wm4 3d17e19c2c options: disable vsfilter blur compat by default
See #7435 and related for context.

Basically, it seems that while the original vsfilter processed subtitles
like with this option set to "yes", many current players (mpc-hc
default, vlc, probably most libass users) treat them like with "no". In
the linked issue, this makes rendering severely slower, and can consume
a lot of memory (or just overflow libass memory calculations). It seems
that changing this to "no" will lead to more good than bad, especially
because newer subtitles may be authored for the "no" behavior.

Most libass users seem to use "no" exactly because they do not call
ass_set_storage_size() at all. This API was needed because the scaling
of the subtitles depends on the video size (vsfilter bugs, or
something). In addition, it's my personal opinion that rendering should
not depend on the video at all, so I like setting the default of this to
"no".
2020-02-07 00:50:25 +01:00
wm4 1dc3507474 path: add mp_path_is_absolute()
Just move it from mp_path_join_bstr() to this new function.
2020-02-06 14:14:35 +01:00
wm4 31acec5438 path: change win32 semantics for joining drive-relative paths
win32 is a cursed abomination which has "drive letters" at the root of
the filesystem namespace for no reason. This requires special handling
beyond tolerating the idiotic "\" path separator.

Even more cursed is the fact that a path starting with a drive letter
can be a relative path. For example, "c:billsucks" is actually a
relative path to the current working directory of the C drive. So for
example if the current working directory is "c:/windowsphone", then
"c:billsucks" would reference "c:/windowsphone/billsucks".

You should realize that win32 is a ridiculous satanic trash fire by the
point you realize that win32 has at least 26 current working
directories, one for each drive letter.

Anyway, the actual problem is that mpv's mp_path_join() function would
return a relative path if an absolute relative path is joined with a
drive-relative path. This should never happen; I bet it breaks a lot of
assumptions (maybe even some security or safety relevant ones, but
probably not).

Since relative drive paths are such a fucked up shit idea, don't try to
support them "properly", and just solve the problem at hand. The
solution produces a path that should be invalid on win32.

Joining two relative paths still behaves the same; this is probably OK
(maybe).

The change isn't very minimal due to me rewriting parts of it without
strict need, but I don't care.

Note that the Python os.path.join() function (after which the mpv
function was apparently modeled) has the same problem.
2020-02-06 14:10:40 +01:00
wm4 2b851933e0 options: stop hiding deprecated options
I think this was annoying. It shouldn't be dishonest about which options
exist. List them as "[deprecated]" instead.
2020-02-04 20:10:38 +01:00
wm4 66a979bd75 options: remove unused set_defaults callback
Was only needed for an ancient version of af_lavfrresample, which is
gone now.
2020-02-01 16:00:44 +01:00
wm4 1caf90a3f7 options: merge split_opt functions
There wasn't really much of a reason to keep split_opt and
splot_opt_silent apart. It made sense before the latter also had a log
call (which was silenced by using mp_null_log if necessary).

Just merge them back into one, and always rely on mp_null_log to silence
unwanted output.

Shouldn't have any functional changes.
2020-01-29 23:20:04 +01:00
wm4 f526797a16 options: suggest not using the syntax that was recently disabled 2020-01-29 18:32:23 +01:00
dudemanguy 6cb3d024c8 Revert "options: move cursor autohiding opts to mp_vo_opts"
This reverts commit 65a317436d.
2020-01-12 01:54:41 +00:00
wm4 d3cef97ad3 options: change option parsing when using a single dash
Addresses dumb things like accidentally overwriting a media file with
e.g. "mpv --log-file test.mkv" (when the user thought that --log-file
was a flag option, when it actually takes a filename). This example will
now print an error. It still works with "-log-file overwritten.mkv", but
prints a warning.

Not sure if I'm being too careful or not "radical" enough. In any case,
both the syntax that stops working and the syntax that produces a
warning now have been discouraged and were called legacy for almost a
decade.
2020-01-07 23:08:45 +01:00
wm4 d26b5daf3e command: make sub-step command actually apply sub-delay change properly
The change was not propagated to the OSD/subtitle code, since that still
uses an "old" method. Change it so that the propagation is actually
performed.

(One could argue the OSD/subtitle code should use other ways to update
the options, but that would probably be more effort for now.)
2020-01-04 21:12:29 +01:00
wm4 8150b8552b options: add mechanism to add sub-options from component lists
There are a lot of ad-hoc component lists in mpv: for example the stream
and demuxer lists. It doesn't seem to make sense to add any abstractions
around it since they are completely trivial and have very specific
probing mechanisms and so on, so they will remain ad-hoc.

This commits add a way to let these add arbitrary per-component options,
without giving up the ad-hoc way, and without having to dump them into
options.c with lots of ifdeffery (like it was done until now).

Also see next commit.
2020-01-04 19:45:50 +01:00
wm4 582f3f7cc0 playlist: change from linked list to an array
Although a linked list was ideal at first, there are cases where it
sucks, and became increasingly awkward (with the mpv command API
preferring integer indexes to access the list). In future, we probably
want to add more playlist-related functionality, so better change it to
an array now.

An array isn't always ideal either. Since playlist entries are still
separate objects (because in some cases you need a stable "iterator" to
it), but you still need to efficiently get the next/previous playlist
entry, there's a pl_index field, that needs to be maintained. E.g.
adding an entry at the start of the playlist => update the pl_index
field for all other entries. Well, it's not really worth to do something
more complicated to avoid these things.

This commit is probably buggy as shit. It's not like I bothered to test
everything. That's _your_ role.
2019-12-28 21:32:15 +01:00
wm4 0c0c373844 m_option: fix runtime changing of --audio-channels
This option type, used by --audio-channels, had a completely broken
m_option_type.equal implementation, and thus reacted incorrectly to
runtime option changes.

Broken since commit b16cea750f.
2019-12-27 17:44:33 +01:00
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
wm4 f719b63840 options: fix incorrect deprecation message
Passing multiple items to a key/value option is OK, only for -add
suffixed options it's deprecated.
2019-12-19 01:17:01 +01:00
wm4 7142214243 options: fix UB/crash in key/values parser
keyvalue_list_find_key() was called on a "partially" constructed list,
because the terminating NULL was added only later. Didn't I say this
code is cursed?

Fixes: #7273
2019-12-18 18:44:21 +01:00
wm4 5f74ed5828 options: deprecate -del for list options
I never liked that these used integer indexes. -remove should have
existed from the start. This deprecation is yet another empty threat,
though.
2019-12-18 06:57:24 +01:00
wm4 9b9307ea9f options: fix filter list comparison (again)
This was completely broken: it compared the first item of the filter
list only. Apparently I forgot that this is a list. This probably broke
aspects of runtime filter changing probably since commit  b16cea750f.

Fix this, and remove some redundant code from obj_settings_equals().
Which is not the same as m_obj_settings_equal(), so rename it to make
confusing them harder. (obj_setting_match() has these very weird label
semantics that should probably just be killed. Or not.)
2019-12-18 06:49:48 +01:00
wm4 0a1588d39b options: add -remove action to list options
Actually I wanted this for key/value lists only, but add it to the
others for consistency too. (For vf/af it barely makes even sense, but
anyway.)
2019-12-18 06:31:39 +01:00
wm4 8bdedf9062 options: make keys in key/value lists unique
I don't even know anymore whether this was intended or not. Certain use
cases for the "-o" options might require this. These options are for
passing general FFmpeg options. These are translated to av_opt_set()
calls, which may or may not accumulate the option values on multiple
calls with the same option name (how should I know?).

Anyway, it seems crazy to allow non-unique keys, so make them unique.

The ad-hoc nature of the option code makes this wonderfully complicated
(when I wrote that this code is cursed, I meant it). In combination with
lazy testing, it probably means there are lots of bugs here.
2019-12-18 06:03:39 +01:00
wm4 d3e3bd4307 options: increase consistency between list options and document them
Whenever I deal with this, I have to look at the code to make sense of
this. And beyond that, there are some strange inconsistencies. (I think
this code is cursed. It always was, and maybe always will be.)

Although the manpage claimed that using multiple items for -add etc. is
deprecated, string list options didn't warn against it. So add the
warning, and add something in the changelog (even though nobody will
ever read this).

The manpage mentioned --vf-append, but this didn't even exist. So add
it, I guess. We encourage using -append for the other option types, so
for consistency, it should work on filter options. (And I already
tricked me into believing it existed when I mentioned it in the
manpage.)

Make the "operations" table separate for all option types, and mention
the option type on every single of the top-level list options.
2019-12-18 05:32:02 +01:00
wm4 e75d28effd command: slightly simplify input-ipc-server change detection/init
The generic change detection now handles this just as well.

The way how this function is manually called at init is slightly gross.
Make that part slightly more explicit to hopefully avoid confusion.
2019-12-17 23:06:10 +01:00
wm4 de0f9b9f2d m_option: clamp integer before adding a value
This is for the previous commit, and should affect behavior with the
special M_PROPERTY_GET_CONSTRICTED_TYPE mechanism only. The effect is
that cycling the "edition" property, if the option is set to "auto",
will change to the second edition instead of the first.

Normally, option values must always be within their range, so this
should not affect anything else. M_PROPERTY_GET_CONSTRICTED_TYPE is
sort-of fine with this kind of behavior.

If this affects any other M_PROPERTY_GET_CONSTRICTED_TYPE users
neqatively, I will revert the change.
2019-12-16 01:52:52 +01:00
James Ross-Gowan b3b2cc44fa console.lua: add this script
Merged from mpv-repl git repo commit 5ea2bf64f9c239f0326b02. Some
changes were made on top of it:

- Tabs were converted to 4 spaces indentation (plus some manual
  indentation fixes in some places).
- All user-visible mentions of "repl" were renamed to "console".
- The README was converted to a manpage (with heavy changes, some
  additions taken from stats.rst; rossy converted the key bindings
  table to RST).
- The method to change the default key binding was changed.
- Change minor detail about "font" default value setting (not a
  functional change).
- Integrate into the player as builtin script, including an option to
  prevent loading it.

Above changes and commit message done by wm4.

Signed-off-by: wm4 <wm4@nowhere>
2019-12-08 02:46:44 +01:00
dudemanguy 65a317436d options: move cursor autohiding opts to mp_vo_opts
Certain backends (i.e. wayland) will need to do special things with the
mouse. It makes sense to expose the values of these options to them, so
they can behave correctly.
2019-12-04 00:47:05 +00:00
wm4 cd9fe3a843 m_config: remove change callback before unintialization
We don't want m_config uninitialization to call random change callbacks.
This happens at the end of mp_destroy(), when almost everything else is
already destroyed, and the change callbacks would probably trigger UB
all over the place.

The change callbacks could be trigger by m_config_restore_backups(),
which is just used as a cheap way to free the remaining state. The worst
is that this depends on which options may still have been part of this
"backup" state, which depends on user input.

Probably never a practical problem, since the backup state is most
likely guaranteed to be empty before uninit is performed, but still.
2019-11-30 17:33:29 +01:00
wm4 40c2f2eeb0 command: change window-minimized/window-maximized to options
Unfortunately, this breaks window state reporting for all VOs which
supported it. This can be fixed later (for x11 in the next commit).
2019-11-29 13:56:58 +01:00
wm4 b16cea750f player: change m_config to use new option handling mechanisms
Instead of making m_config a special-case, it more or less uses the
underlying m_config_cache/m_config_shadow APIs properly. This makes the
player core a (relatively) equivalent user of the core option API. In
particular, this means that other threads can change core options with
m_config_cache_write_opt() calls (before this commit, this merely led to
diverging option values).

An important change is that before this commit, mpctx->opts contained
the "master copy" of all option data. Now it's just another copy of the
option data, and the shadow copy is considered the master. This is why
whenever mpctx->opts is written, the change needs to be copied to the
master (thus why this commits add a bunch of m_config_notify... calls).

If another thread (e.g. a VO) changes an option, async_change_cb is now
invoked, which funnels the change notification through the player's
layers.

The new self_notification parameter on mp_option_change_callback is so
that m_config_notify... doesn't trigger recursion, and it's used in
cases where the change was already "processed". It's still needed to
trigger libmpv property updates. (I considered using an extra
m_config_cache for that, but it'd only cause problems with no
advantages.)

I think the recent changes actually forgot to send libmpv property
updates in some cases. This should fix this anyway. In some cases,
property updates are reworked, and the potential for bugs should be
lower (probably).

The primary point of this change is to allow external updates, for
example by a VO writing the fullscreen option if the window state is
changed by the window manager (rather than mpv changing it). This is not
used yet, but the following commits will.
2019-11-29 12:49:15 +01:00
wm4 5e2658c981 m_config: make m_config_cache_write_opt() check/return changes
Goes in line with the recent changes to always checking for option value
changes. The player core will use this to determine whether it should
send additional change events.
2019-11-29 12:37:41 +01:00
wm4 1cb085a82e options: get rid of GLOBAL_CONFIG hack
Just an implementation detail that can be cleaned up now. Internally,
m_config maintains a tree of m_sub_options structs, except for the root
it was not defined explicitly. GLOBAL_CONFIG was a hack to get access to
it anyway. Define it explicitly instead.
2019-11-29 12:14:43 +01:00
wm4 5083db91eb m_config: untangle new and old code somewhat
The original MPlayer m_config was essentially only responsible for
handling some command line parsing details, handling profiles, and
file-local options. And then there's the new mpv stuff (that stuff was
regretfully written by me), which is mostly associated with making
things thread-safe (includes things like making it all library-safe,
instead of stuffing all option data into global variables).

This commit tries to separate them some more. For example,
m_config_shadow (the thread-safe thing) now does not need access to
m_config anymore. m_config can hopefully be reduced to handling only the
"old" mplayer-derived mechanisms.
2019-11-29 12:14:43 +01:00
wm4 f73881fa10 m_config: allow writing options through m_config_cache
This will allow any other threads to write to the global option data in
a safe way.

The typical example for this is the fullscreen option, which needs to be
written by VO (or even some other thing running completely separate from
the main thread). We have a complicated and annoying contraption which
gets the value updated on the main thread, and this function will help
get rid of it.

As of this commit, this doesn't really work yet, because he main thread
uses its own weird copy of the option data.
2019-11-29 12:14:43 +01:00
wm4 591494b271 m_config: add fine-grained option reporting mechanism
This adds m_config_cache_get_next_changed() and the change_flags field
in m_config_cache. Both can be used to determine whether specific
options changed (rather than the entire sub-group).

Not sure if I'm very happy with that. The former rather compact
update_options() is now a bit of a mess, because it needs to be
incremental. m_config_cache_get_next_changed() will not be too nice to
use, and change_flags still relies on global "allocation" of change
flags (see UPDATE_* defines in m_option.h). If C weren't such a
primitive language that smells like grandpa, it would be nice to define
per-option change callbacks or so.

This compares options by value to determine whether they have changed.
This makes it slower in theory, but in practice it probably doesn't
matter (options are rarely changed after initialization). The
alternative would have been per-option change counters (wastes too much
memory; not a practical problem but too ugly), or keep all
m_config_caches in a global list and have bitmaps with per-option change
bits (sounds complicated). I guess the current way is OK.

Technically, this changes semantics slightly by ignoring setting an
option to the same value. Technically this wasn't a no-op, although the
effect was almost almost no-op. Some code would actually become cleaner
by ignoring such redundant change events, and them being no-op is
probably also what the user would normally assume.
2019-11-29 12:14:43 +01:00
wm4 1e6c57d4e4 m_config: move stuff around
Create a separate struct for internal fields of m_config_cache, so API
users can't just mess with stuff they shouldn't access.

Move the ts field out of m_config_data, so we don't need unnecessary
atomics in one case.

This is just preparation, and shouldn't change any behavior.
2019-11-29 12:14:43 +01:00
wm4 0cd612530c m_option: remove an outdated ancient comment
The exact type name (m_obj_list_t) was removed in 2013. I don't think
this stub comment helps much with understanding this complicated thing
anyway (this code is for the --vf/--af options, and makes up almost half
of m_option.c).
2019-11-29 12:14:43 +01:00
wm4 63270ff898 m_option: add option comparison
Looks like this will be needed for fine-grained option change
notifications. There are some other parts in the player which implement
parts of this.
2019-11-29 12:14:43 +01:00
wm4 7c6570402b options: remove options-to-property bridge
The previous bunch of commits made this unnecessary, so this should be
a purely internal change with no user impact.

This may or may not open the way to future improvements. Even if not,
at least the property/option interaction should now be much less buggy.
2019-11-25 20:29:43 +01:00
wm4 37ac43847e options: pre-check filter names when using vf/af libavfilter bridge
Until now, using a filter not in mpv's builtin filter list would assume
it's a libavfilter filter. If it wasn't, the option value was still
accepted, but creating the filter simply failed. But since this happens
after option parsing, so the result is confusing.

Improve this slightly by checking filter names. This will reject truly
unknown filters at option parsing time. Unfortunately, this still does
not check filter arguments. This would be much more complex, because
you'd have to create a dummy filter graph and allocate the filter. Maybe
another time.
2019-11-25 20:29:42 +01:00
wm4 d123af34b5 m_config: discourage mp_read_option_raw()
This function is dangerous, because it disables the already basic/week
type checking the option system has at all. I'm tend towards thinking
that all of its uses should be replaced.
2019-11-25 00:52:30 +01:00
wm4 3a2dc8b22e command, options: deprecate old --display-fps behavior
See changelog and manpage changes.

(So much effort to fix an ancient dumb mistake for an option nobody
should use anyway.)
2019-11-25 00:47:53 +01:00
wm4 c26e80d0fd command: shuffle some crap around
This is preparation to get rid of the option-to-property bridge
(mp_on_set_option). This is a pretty insane thing that redirects
accesses to options to properties. It was needed in the ever ongoing
transition from something to... something else.

A good example for the need of this bridge is applying profiles at
runtime. This obviously goes through the config parser, but should also
make all changes effective, for which traditionally the property layer
is used.

There isn't much left that needs this bridge. This commit changes a
bunch of options (which also have a property implementation) to use
option change notifications instead. Many of the properties are still
left, but perform unrelated functions like OSD formatting.

This should be mostly compatible. There may be some subtle behavior
changes. For example, "hwdec" and "record-file" do not check for changes
anymore before applying them, so writing the current value to them
suddenly does something, while it was ignored before.

DVB changes untested, but should work.
2019-11-25 00:26:36 +01:00
wm4 e2e6bb496e options: remove deprecated --playlist-pos alias
This causes problems because it has the same name as a property which
behaves differently.
2019-11-24 22:39:47 +01:00
Chris Down e143966a76 player: Optionally validate st_mtime when restoring playback state
I often watch sporting events. On many occasions I get files with the
same filename for each session. For example, for F1 I might have the
following directory structure:

    F1/
        FP1.mkv
        FP2.mkv
        FP3.mkv
        Qualification.mkv
        Race.mkv

Since usually one simply watches one race after the other, I usually
just rsync the new event's files over the old ones, so, for example,
Race.mkv will be replaced from the file for the last event with the file
from the new event.

One problem with this is that I like to use --resume-playback for other
kinds of media, so I have it on by default. That works great for, say, a
movie, but doesn't work so well with this scheme, because you can
trivially forget to pass --no-resume-playback on the command line and
end up 2 hours in, watching spoilers as the race results scroll down the
screen :-)

This patch adds a new option, --resume-playback-check-mtime, which
validates that the file's mtime hasn't changed since the watch_later
configuration was saved. It does this by setting the watch_later
configuration to have the same mtime as the file after it is saved.

Switching back and forth between checking mtime and not checking mtime
works fine, as we only choose whether to compare based on it, but we
update the watch_later configuration mtime regardless of its value.
2019-11-20 15:11:33 +01:00
wm4 f57f13ceb0 options: deprecate --input-file
I have no idea why this still exists, since we have --input-ipc-server.
I think there was something about Windows, but the latter option is
implemented even on Windows.
2019-11-16 15:28:18 +01:00
wm4 07fd511e14 options: remove M_SETOPT_RUNTIME
Used to contain flags for "save" setting of options at runtime. Now
there is nothing special needed anymore and it's 0. So drop it
completely, and remove anything that distinguishes between runtime and
initialization time.
2019-11-10 23:53:57 +01:00
wm4 4cae192377 options: remove M_OPT_FIXED
Options marked with this flag were changed to strictly read-only after
initialization (mpv_initialize() in the client API, after option parsing
and config file loading with the CLI player).

This used to be necessary, because there was a single option struct that
could be accessed by multiple threads. For example, --config-dir sets
MPOpts.force_configdir, which was read whenever anything accessed the
mpv config dir (which could be on different threads, e.g. font
initialization tries to lookup fonts.conf from an arbitrary thread).

This isn't needed anymore, because threads now access these in a thread
safe way. In the case of --config-dir, the path is actually just copied
on init.

This M_OPT_FIXED mechanism is thus not strictly needed anymore. It still
prevents writing to some options that cannot take effect at runtime, but
even that can be dropped. In general, all mpv options can be changed any
time at runtime, even if they never take effect, and there's no need to
make an exception for a very low number of options. So just get rid of
it.
2019-11-10 23:49:23 +01:00