m_config: add helper function for initializing af/ao/vf/vo suboptions

Normally I'd prefer a bunch of smaller functions with fewer parameters
over a single function with a lot of parameters. But future changes will
require messing with the parameters in a slightly more complex way, so a
combined function will be needed anyway. The now-unused "global"
parameter is required for later as well.

2 files changed, 22 insertions, 9 deletions

diff --git a/options/m_config.c b/options/m_config.c
index d4c19808b0..7da23dc8d0 100644
--- a/options/m_config.c
+++ b/options/m_config.c
@@ -221,7 +221,7 @@ struct m_config *m_config_from_obj_desc_noalloc(void *talloc_ctx,
     return m_config_new(talloc_ctx, log, 0, desc->priv_defaults, desc->options);
 }
 
-int m_config_set_obj_params(struct m_config *conf, char **args)
+static int m_config_set_obj_params(struct m_config *conf, char **args)
 {
     for (int n = 0; args && args[n * 2 + 0]; n++) {
         int r = m_config_set_option(conf, bstr0(args[n * 2 + 0]),
@@ -232,8 +232,8 @@ int m_config_set_obj_params(struct m_config *conf, char **args)
     return 0;
 }
 
-int m_config_apply_defaults(struct m_config *config, const char *name,
-                            struct m_obj_settings *defaults)
+static int m_config_apply_defaults(struct m_config *config, const char *name,
+                                   struct m_obj_settings *defaults)
 {
     int r = 0;
     for (int n = 0; defaults && defaults[n].name; n++) {
@@ -246,6 +246,22 @@ int m_config_apply_defaults(struct m_config *config, const char *name,
     return r;
 }
 
+struct m_config *m_config_from_obj_desc_and_args(void *ta_parent,
+    struct mp_log *log, struct mpv_global *global, struct m_obj_desc *desc,
+    const char *name, struct m_obj_settings *defaults, char **args)
+{
+    struct m_config *config = m_config_from_obj_desc(ta_parent, log, desc);
+    if (m_config_apply_defaults(config, name, defaults) < 0)
+        goto error;
+    if (m_config_set_obj_params(config, args) < 0)
+        goto error;
+
+    return config;
+error:
+    talloc_free(config);
+    return NULL;
+}
+
 static void ensure_backup(struct m_config *config, struct m_config_option *co)
 {
     if (co->opt->type->flags & M_OPT_TYPE_HAS_CHILD)
diff --git a/options/m_config.h b/options/m_config.h
index 4ac673859f..c8225706ee 100644
--- a/options/m_config.h
+++ b/options/m_config.h
@@ -106,12 +106,9 @@ struct m_config *m_config_from_obj_desc_noalloc(void *talloc_ctx,
                                                 struct mp_log *log,
                                                 struct m_obj_desc *desc);
 
-int m_config_set_obj_params(struct m_config *conf, char **args);
-
-// Search for the object with the given name in the defaults list, and apply
-// its parameters.
-int m_config_apply_defaults(struct m_config *config, const char *name,
-                            struct m_obj_settings *defaults);
+struct m_config *m_config_from_obj_desc_and_args(void *ta_parent,
+    struct mp_log *log, struct mpv_global *global, struct m_obj_desc *desc,
+    const char *name, struct m_obj_settings *defaults, char **args);
 
 // Make sure the option is backed up. If it's already backed up, do nothing.
 // All backed up options can be restored with m_config_restore_backups().