From 1a5650b62837308a0106a365a9fd26057defaf67 Mon Sep 17 00:00:00 2001
From: wm4 <wm4@nowhere>
Date: Fri, 7 Nov 2014 16:33:41 +0100
Subject: command: export the flag whether an option was set on commandline

Can be useful for certain scripts; I think someone requested this.
---
 DOCS/man/input.rst | 12 ++++++++++++
 player/command.c   | 26 ++++++++++++++++++++++++++
 2 files changed, 38 insertions(+)

diff --git a/DOCS/man/input.rst b/DOCS/man/input.rst
index 651b93f7c3..21d0751447 100644
--- a/DOCS/man/input.rst
+++ b/DOCS/man/input.rst
@@ -1438,6 +1438,18 @@ Property list
     access the local value, and the ``old`` value, which will be restored on
     end of playback, can not be read or written until end of playback.)
 
+``option-flags/<name>``
+    Minor additional per-option information.
+
+    This has a number of sub-properties. Replace ``<name>`` with the name of
+    a top-level option.
+
+    ``option-flags/<name>/set-from-commandline``
+
+        Return ``yes`` if the option was set from the mpv command line,
+        ``no`` otherwise. What this is set to if the option is e.g. changed
+        at runtime is left undefined (meaning it could change in the future).
+
 ``property-list``
     Return the list of top-level properties.
 
diff --git a/player/command.c b/player/command.c
index 27ba3244a1..198ed64242 100644
--- a/player/command.c
+++ b/player/command.c
@@ -3001,6 +3001,31 @@ static int mp_property_local_options(void *ctx, struct m_property *prop,
     return access_option_list(action, arg, true, mpctx);
 }
 
+static int mp_property_option_flags(void *ctx, struct m_property *prop,
+                                    int action, void *arg)
+{
+    MPContext *mpctx = ctx;
+    switch (action) {
+    case M_PROPERTY_KEY_ACTION: {
+        struct m_property_action_arg *ka = arg;
+        bstr key;
+        char *rem;
+        m_property_split_path(ka->key, &key, &rem);
+        struct m_config_option *co = m_config_get_co(mpctx->mconfig, key);
+        if (!co)
+            return M_PROPERTY_UNKNOWN;
+
+        struct m_sub_property props[] = {
+            {"set-from-commandline",    SUB_PROP_FLAG(co->is_set_from_cmdline)},
+            {0}
+        };
+
+        return m_property_read_sub(props, ka->action, ka->arg);
+    }
+    }
+    return M_PROPERTY_NOT_IMPLEMENTED;
+}
+
 static const struct m_property mp_properties[];
 
 static int mp_property_list(void *ctx, struct m_property *prop,
@@ -3212,6 +3237,7 @@ static const struct m_property mp_properties[] = {
 
     {"options", mp_property_options},
     {"file-local-options", mp_property_local_options},
+    {"option-flags", mp_property_option_flags},
     {"property-list", mp_property_list},
 
     {0},
-- 
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