player/command: add albumart argument to video-add

Enables marking of specific video sources as album art.

Co-authored-by: Jan Ekström <jeebjp@gmail.com>

DOCS/interface-changes.rst

@@ -34,6 +34,8 @@ Interface changes
       which didn't take the menu bar and Dock into account. The new default
       behaviour includes both. To revert to the old behavior set this to
       `whole`.
+    - add an additional optional `albumart` argument to the `video-add` command,
+      which tells mpv to load the given video as album art.
  --- mpv 0.33.0 ---
     - add `--d3d11-exclusive-fs` flag to enable D3D11 exclusive fullscreen mode
       when the player enters fullscreen.

DOCS/man/input.rst

@@ -801,8 +801,11 @@ Remember to quote string arguments in input.conf (see `Flat command syntax`_).
 ``audio-reload [<id>]``
     Reload the given audio tracks. See ``sub-reload`` command.
 
-``video-add <url> [<flags> [<title> [<lang>]]]``
-    Load the given video file. See ``sub-add`` command.
+``video-add <url> [<flags> [<title> [<lang> [<albumart>]]]]``
+    Load the given video file. See ``sub-add`` command for common options.
+
+    ``albumart`` (``MPV_FORMAT_FLAG``)
+        If enabled, mpv will load the given video as album art.
 
 ``video-remove [<id>]``
     Remove the given video track. See ``sub-remove`` command.

player/command.c

@@ -5241,6 +5241,8 @@ static void cmd_track_add(void *p)
     struct mp_cmd_ctx *cmd = p;
     struct MPContext *mpctx = cmd->mpctx;
     int type = *(int *)cmd->priv;
+    bool is_albumart = type == STREAM_VIDEO &&
+                       cmd->args[4].v.i;
 
     if (mpctx->stop_play) {
         cmd->success = false;
@@ -5260,7 +5262,7 @@ static void cmd_track_add(void *p)
         }
     }
     int first = mp_add_external_file(mpctx, cmd->args[0].v.s, type,
-                                     cmd->abort->cancel, false);
+                                     cmd->abort->cancel, is_albumart);
     if (first < 0) {
         cmd->success = false;
         return;
@@ -5323,9 +5325,10 @@ static void cmd_track_reload(void *p)
 
     if (t && t->is_external && t->external_filename) {
         char *filename = talloc_strdup(NULL, t->external_filename);
+        bool is_albumart = t->attached_picture;
         mp_remove_track(mpctx, t);
         nt_num = mp_add_external_file(mpctx, filename, type, cmd->abort->cancel,
-                                      false);
+                                      is_albumart);
         talloc_free(filename);
     }
 
@@ -6072,6 +6075,7 @@ const struct mp_cmd_def mp_cmds[] = {
                 .flags = MP_CMD_OPT_ARG},
             {"title", OPT_STRING(v.s), .flags = MP_CMD_OPT_ARG},
             {"lang", OPT_STRING(v.s), .flags = MP_CMD_OPT_ARG},
+            {"albumart", OPT_FLAG(v.i), .flags = MP_CMD_OPT_ARG},
         },
         .priv = &(const int){STREAM_VIDEO},
         .spawn_thread = true,