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, 0 insertions, 4 deletions

diff --git a/video/sws_utils.h b/video/sws_utils.h
index f8b4384e97..a3e91b3aa9 100644
--- a/video/sws_utils.h
+++ b/video/sws_utils.h
@@ -56,10 +56,6 @@ void mp_sws_set_from_cmdline(struct mp_sws_context *ctx, struct sws_opts *opts);
 int mp_sws_scale(struct mp_sws_context *ctx, struct mp_image *dst,
                  struct mp_image *src);
 
-struct vf_seteq;
-int mp_sws_set_vf_equalizer(struct mp_sws_context *sws, struct vf_seteq *eq);
-int mp_sws_get_vf_equalizer(struct mp_sws_context *sws, struct vf_seteq *eq);
-
 struct mp_image *mp_img_swap_to_native(struct mp_image *img);
 
 #endif /* MP_SWS_UTILS_H */