options: add --deinterlace-field-parity option

Previously there was no way to specify the field order of interlaced videos
when deinterlacing with inbuilt filters. Lavfi deinterlacers seemed to prefer
top field order while inbuilt ones (vdpaupp, vavpp, d3d11vpp) seemed to prefer
bottom field order. The default "auto" option should work exactly as before
while specifying either "tff" or "bff" should force the specified field order

1 files changed, 1 insertions, 0 deletions

diff --git a/options/options.h b/options/options.h
index 9dce3f609c..1b7c3e3583 100644
--- a/options/options.h
+++ b/options/options.h
@@ -399,6 +399,7 @@ struct dvd_opts {
 
 struct filter_opts {
     int deinterlace;
+    int field_parity;
 };
 
 extern const struct m_sub_options vo_sub_opts;