command: add a load-script command

The intention is to give libmpv users as much flexibility to load
scripts as using mpv from CLI, but without restricting libmpv users from
having to decide everything on creation time, or having to go through
hacks like recreating the libmpv context to update state.

3 files changed, 13 insertions, 5 deletions

diff --git a/player/command.c b/player/command.c
index 2296c97f7b..d49b844caf 100644
--- a/player/command.c
+++ b/player/command.c
@@ -5472,6 +5472,13 @@ int run_command(struct MPContext *mpctx, struct mp_cmd *cmd, struct mpv_node *re
         break;
     }
 
+    case MP_CMD_LOAD_SCRIPT: {
+        char *script = cmd->args[0].v.s;
+        if (mp_load_script(mpctx, script) < 0)
+            return -1;
+        break;
+    }
+
     default:
         MP_VERBOSE(mpctx, "Received unknown cmd %s\n", cmd->name);
         return -1;
diff --git a/player/core.h b/player/core.h
index d67a9d62ad..53e6e6f99c 100644
--- a/player/core.h
+++ b/player/core.h
@@ -550,6 +550,7 @@ struct mp_scripting {
 };
 void mp_load_scripts(struct MPContext *mpctx);
 void mp_load_builtin_scripts(struct MPContext *mpctx);
+int mp_load_script(struct MPContext *mpctx, const char *fname);
 
 // sub.c
 void reset_subtitle_state(struct MPContext *mpctx);
diff --git a/player/scripting.c b/player/scripting.c
index b6ba69ac07..76395c6ad6 100644
--- a/player/scripting.c
+++ b/player/scripting.c
@@ -100,7 +100,7 @@ static void wait_loaded(struct MPContext *mpctx)
     mp_wakeup_core(mpctx); // avoid lost wakeups during waiting
 }
 
-static void mp_load_script(struct MPContext *mpctx, const char *fname)
+int mp_load_script(struct MPContext *mpctx, const char *fname)
 {
     char *ext = mp_splitext(fname, NULL);
     const struct mp_scripting *backend = NULL;
@@ -114,7 +114,7 @@ static void mp_load_script(struct MPContext *mpctx, const char *fname)
 
     if (!backend) {
         MP_VERBOSE(mpctx, "Can't load unknown script: %s\n", fname);
-        return;
+        return -1;
     }
 
     struct thread_arg *arg = talloc_ptrtype(NULL, arg);
@@ -129,7 +129,7 @@ static void mp_load_script(struct MPContext *mpctx, const char *fname)
     };
     if (!arg->client) {
         talloc_free(arg);
-        return;
+        return -1;
     }
     arg->log = mp_client_get_log(arg->client);
 
@@ -139,13 +139,13 @@ static void mp_load_script(struct MPContext *mpctx, const char *fname)
     if (pthread_create(&thread, NULL, script_thread, arg)) {
         mpv_detach_destroy(arg->client);
         talloc_free(arg);
-        return;
+        return -1;
     }
 
     wait_loaded(mpctx);
     MP_VERBOSE(mpctx, "Done loading %s.\n", fname);
 
-    return;
+    return 0;
 }
 
 static int compare_filename(const void *pa, const void *pb)