video: redo video equalizer option handling

I really wouldn't care much about this, but some parts of the core code
are under HAVE_GPL, so there's some need to get rid of it. Simply turn
the video equalizer from its current fine-grained handling with vf/vo
fallbacks into global options. This makes updating them much simpler.

This removes any possibility of applying video equalizers in filters,
which affects vf_scale, and the previously removed vf_eq. Not a big
loss, since the preferred VOs have this builtin.

Remove video equalizer handling from vo_direct3d, vo_sdl, vo_vaapi, and
vo_xv. I'm not going to waste my time on these legacy VOs.

vo.eq_opts_cache exists _only_ to send a VOCTRL_SET_EQUALIZER, which
exists _only_ to trigger a redraw. This seems silly, but for now I feel
like this is less of a pain. The rest of the equalizer using code is
self-updating.

See commit 96b906a51d5 for how some video equalizer code was GPL only.
Some command line option names and ranges can probably be traced back to
a GPL only committer, but we don't consider these copyrightable.

1 files changed, 1 insertions, 7 deletions

diff --git a/options/options.h b/options/options.h
index 9ea09a83b3..ecb38e3995 100644
--- a/options/options.h
+++ b/options/options.h
@@ -119,13 +119,7 @@ typedef struct MPOpts {
     char *media_title;
     int force_rgba_osd;
 
-    // ranges -100 - 100, 1000 if the vo default should be used
-    int gamma_gamma;
-    int gamma_brightness;
-    int gamma_contrast;
-    int gamma_saturation;
-    int gamma_hue;
-    int video_output_levels;
+    struct mp_csp_equalizer_opts *video_equalizer;
 
     int stop_screensaver;
     int cursor_autohide_delay;