video/out/gpu/context: convert --gpu-context to use obj_settings_list

Since the list of available GPU contexts is a compile time constant,
use obj_settings_list instead of opt_string_validate for GPU contexts.
This has several advantages:

- Aligns with the existing usage of vo, ao, and filter lists.
- Allows custom probing order.
- Allows list option suffixes. (--gpu-context-append, etc.)
- Allows autocomplete in console.lua.
- Uses the standard obj_settings_list help printing, so the custom
  help printing function is no longer needed.

This also deduplicates some context creation code for ra_ctx_create
and ra_ctx_create_by_name.

1 files changed, 1 insertions, 1 deletions

diff --git a/player/command.c b/player/command.c
index 190b1fc025..b7130814d8 100644
--- a/player/command.c
+++ b/player/command.c
@@ -7306,7 +7306,7 @@ void mp_option_change_callback(void *ctx, struct m_config_option *co, int flags,
     }
 
     if (opt_ptr == &opts->vo->video_driver_list ||
-        opt_ptr == &opts->ra_ctx_opts->context_name ||
+        opt_ptr == &opts->ra_ctx_opts->context_list ||
         opt_ptr == &opts->ra_ctx_opts->context_type) {
         struct track *track = mpctx->current_track[0][STREAM_VIDEO];
         uninit_video_out(mpctx);