AVOptions: add flags for read/read-only options

1 files changed, 9 insertions, 0 deletions

diff --git a/libavutil/opt.h b/libavutil/opt.h
index 2568a7103e..b90feaad8f 100644
--- a/libavutil/opt.h
+++ b/libavutil/opt.h
@@ -268,6 +268,15 @@ typedef struct AVOption {
 #define AV_OPT_FLAG_AUDIO_PARAM     8
 #define AV_OPT_FLAG_VIDEO_PARAM     16
 #define AV_OPT_FLAG_SUBTITLE_PARAM  32
+/**
+ * The option is inteded for exporting values to the caller.
+ */
+#define AV_OPT_FLAG_EXPORT          64
+/**
+ * The option may not be set through the AVOptions API, only read.
+ * This flag only makes sense when AV_OPT_FLAG_EXPORT is also set.
+ */
+#define AV_OPT_FLAG_READONLY        128
 //FIXME think about enc-audio, ... style flags
 
     /**