video: decouple filtering/decoding slightly more

Lots of noise to remove the vfilter/vo fields from dec_video.

From now on, video filtering and output will still be done together,
summarized under struct vo_chain.

There is the question where exactly the vf_chain should go in such a
decoupled architecture. The end goal is being able to place a "complex"
filter between video decoders and output (which will culminate in
natural integration of A->V filters for natural integration of
libavfilter audio visualizations). The vf_chain is still useful for
"final" processing, such as format conversions and deinterlacing. Also,
there's only 1 VO and 1 --vf option. So having 1 vf_chain for a VO seems
ideal, since otherwise there would be no natural way to handle all these
existing options and mechanisms.

There is still some work required to truly decouple decoding.

1 files changed, 2 insertions, 2 deletions

diff --git a/player/sub.c b/player/sub.c
index c20df53c60..0633ebaea1 100644
--- a/player/sub.c
+++ b/player/sub.c
@@ -77,8 +77,8 @@ static bool update_subtitle(struct MPContext *mpctx, double video_pts, int order
     if (!track || !dec_sub || video_pts == MP_NOPTS_VALUE)
         return true;
 
-    if (mpctx->d_video) {
-        struct mp_image_params params = mpctx->d_video->vfilter->input_params;
+    if (mpctx->vo_chain) {
+        struct mp_image_params params = mpctx->vo_chain->vf->input_params;
         if (params.imgfmt)
             sub_control(dec_sub, SD_CTRL_SET_VIDEO_PARAMS, &params);
     }