command: add an apply-profile command

This will actually update all associated options (which is trivial now
with the recent changes).

DOCS/man/input.rst

@@ -691,6 +691,14 @@ Input Commands that are Possibly Subject to Change
 ``af-command "<label>" "<cmd>" "<args>"``
     Same as ``vf-command``, but for audio filters.
 
+``apply-profile "<name>"``
+    Apply the contents of a named profile. This is like using ``profile=name``
+    in a config file, except you can map it to a key binding to change it at
+    runtime.
+
+    There is no such thing as "unapplying" a profile - applying a profile
+    merely sets all option values listed within the profile.
+
 Undocumented commands: ``tv-last-channel`` (TV/DVB only),
 ``ao-reload`` (experimental/internal).
 

input/cmd_list.c

@@ -224,6 +224,8 @@ const struct mp_cmd_def mp_cmds[] = {
                       {"reselect", 1})),
   }},
 
+  { MP_CMD_APPLY_PROFILE, "apply-profile", {ARG_STRING } },
+
   {0}
 };
 

input/cmd_list.h

@@ -114,6 +114,8 @@ enum mp_command_type {
 
     MP_CMD_RESCAN_EXTERNAL_FILES,
 
+    MP_CMD_APPLY_PROFILE,
+
     // Internal
     MP_CMD_COMMAND_LIST, // list of sub-commands in args[0].v.p
 };

player/command.c

@@ -5514,6 +5514,14 @@ int run_command(struct MPContext *mpctx, struct mp_cmd *cmd, struct mpv_node *re
         break;
     }
 
+    case MP_CMD_APPLY_PROFILE: {
+        char *profile = cmd->args[0].v.s;
+        int flags = mpctx->initialized ? M_SETOPT_RUNTIME : 0;
+        if (m_config_set_profile(mpctx->mconfig, profile, flags) < 0)
+            return -1;
+        break;
+    }
+
     default:
         MP_VERBOSE(mpctx, "Received unknown cmd %s\n", cmd->name);
         return -1;