options: add a mechanism to make sub-option replacement slightly easier

Instead of requiring each VO or AO to manually add members to MPOpts and
the global option table, make it possible to register them automatically
via vo_driver/ao_driver.global_opts members. This avoids modifying
options.c/options.h every time, including having to duplicate the exact
ifdeffery used to enable a driver.

1 files changed, 4 insertions, 0 deletions

diff --git a/video/out/vo.h b/video/out/vo.h
index 15f9f9e7df..6a6101692c 100644
--- a/video/out/vo.h
+++ b/video/out/vo.h
@@ -296,6 +296,10 @@ struct vo_driver {
 
     // List of options to parse into priv struct (requires priv_size to be set)
     const struct m_option *options;
+
+    // Global options to register if the VO is compiled in.
+    // mp_get_config_group() or other function can be used to access them.
+    const struct m_sub_options *global_opts;
 };
 
 struct vo {