From 5be0410cb31cd27ce5b518b0eca942ec90af5f34 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Cl=C3=A9ment=20B=C5=93sch?= <u@pkh.me>
Date: Sun, 22 Apr 2018 16:30:19 +0200
Subject: [PATCH] lavu/opt: add AV_OPT_FLAG_DEPRECATED

---
 doc/APIchanges      | 3 +++
 libavutil/opt.c     | 6 ++++++
 libavutil/opt.h     | 1 +
 libavutil/version.h | 2 +-
 4 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/doc/APIchanges b/doc/APIchanges
index 8d305d5867..a216e5aa4d 100644
--- a/doc/APIchanges
+++ b/doc/APIchanges
@@ -15,6 +15,9 @@ libavutil:     2017-10-21
 
 API changes, most recent first:
 
+2018-04-xx - xxxxxxxxxx - lavu 56.17.100 - opt.h
+  Add AV_OPT_FLAG_DEPRECATED.
+
 2018-04-xx - xxxxxxxxxx - lavu 56.16.100 - threadmessage.h
   Add av_thread_message_queue_nb_elems().
 
diff --git a/libavutil/opt.c b/libavutil/opt.c
index 3b0aab4ee8..99282605f5 100644
--- a/libavutil/opt.c
+++ b/libavutil/opt.c
@@ -463,6 +463,9 @@ int av_opt_set(void *obj, const char *name, const char *val, int search_flags)
     if (o->flags & AV_OPT_FLAG_READONLY)
         return AVERROR(EINVAL);
 
+    if (o->flags & AV_OPT_FLAG_DEPRECATED)
+        av_log(obj, AV_LOG_WARNING, "The \"%s\" option is deprecated: %s\n", name, o->help);
+
     dst = ((uint8_t *)target_obj) + o->offset;
     switch (o->type) {
     case AV_OPT_TYPE_BOOL:
@@ -759,6 +762,9 @@ int av_opt_get(void *obj, const char *name, int search_flags, uint8_t **out_val)
     if (!o || !target_obj || (o->offset<=0 && o->type != AV_OPT_TYPE_CONST))
         return AVERROR_OPTION_NOT_FOUND;
 
+    if (o->flags & AV_OPT_FLAG_DEPRECATED)
+        av_log(obj, AV_LOG_WARNING, "The \"%s\" option is deprecated: %s\n", name, o->help);
+
     dst = (uint8_t *)target_obj + o->offset;
 
     buf[0] = 0;
diff --git a/libavutil/opt.h b/libavutil/opt.h
index 07da68ea23..39f4a8dda0 100644
--- a/libavutil/opt.h
+++ b/libavutil/opt.h
@@ -289,6 +289,7 @@ typedef struct AVOption {
 #define AV_OPT_FLAG_READONLY        128
 #define AV_OPT_FLAG_BSF_PARAM       (1<<8) ///< a generic parameter which can be set by the user for bit stream filtering
 #define AV_OPT_FLAG_FILTERING_PARAM (1<<16) ///< a generic parameter which can be set by the user for filtering
+#define AV_OPT_FLAG_DEPRECATED      (1<<17) ///< set if option is deprecated, users should refer to AVOption.help text for more information
 //FIXME think about enc-audio, ... style flags
 
     /**
diff --git a/libavutil/version.h b/libavutil/version.h
index 23567000a3..b087c15488 100644
--- a/libavutil/version.h
+++ b/libavutil/version.h
@@ -79,7 +79,7 @@
  */
 
 #define LIBAVUTIL_VERSION_MAJOR  56
-#define LIBAVUTIL_VERSION_MINOR  16
+#define LIBAVUTIL_VERSION_MINOR  17
 #define LIBAVUTIL_VERSION_MICRO 100
 
 #define LIBAVUTIL_VERSION_INT   AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \