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, 7 deletions

diff --git a/video/filter/vf.h b/video/filter/vf.h
index 546fd823ad..8a9815078d 100644
--- a/video/filter/vf.h
+++ b/video/filter/vf.h
@@ -141,15 +141,8 @@ struct vf_chain {
     void *wakeup_callback_ctx;
 };
 
-typedef struct vf_seteq {
-    const char *item;
-    int value;
-} vf_equalizer_t;
-
 enum vf_ctrl {
     VFCTRL_SEEK_RESET = 1,   // reset on picture and PTS discontinuities
-    VFCTRL_SET_EQUALIZER,    // set color options (brightness,contrast etc)
-    VFCTRL_GET_EQUALIZER,    // get color options (brightness,contrast etc)
 #if HAVE_GPL
     VFCTRL_SET_DEINTERLACE,  // Set deinterlacing status
     VFCTRL_GET_DEINTERLACE,  // Get deinterlacing status