video: add metadata handling for spherical video

This adds handling of spherical video metadata: retrieving it from
demux_lavf and demux_mkv, passing it through filters, and adjusting it
with vf_format. This does not include support for rendering this type of
video.

We don't expect we need/want to support the other projection types like
cube maps, so we don't include that for now. They can be added later as
needed.

Also raise the maximum sizes of stringified image params, since they
can get really long.

1 files changed, 4 insertions, 0 deletions

diff --git a/video/decode/dec_video.c b/video/decode/dec_video.c
index 8211d1f3b2..04e428246b 100644
--- a/video/decode/dec_video.c
+++ b/video/decode/dec_video.c
@@ -244,6 +244,10 @@ static void fix_image_params(struct dec_video *d_video,
         p.color.sig_peak = 0.0;
     }
 
+    p.spherical = c->spherical;
+    if (p.spherical.type == MP_SPHERICAL_AUTO)
+        p.spherical.type = MP_SPHERICAL_NONE;
+
     // Guess missing colorspace fields from metadata. This guarantees all
     // fields are at least set to legal values afterwards.
     mp_image_params_guess_csp(&p);