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-rw-r--r--libavutil/avstring.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/libavutil/avstring.h b/libavutil/avstring.h
index a46d012552..15b04babef 100644
--- a/libavutil/avstring.h
+++ b/libavutil/avstring.h
@@ -284,6 +284,11 @@ const char *av_dirname(char *path);
/**
* Match instances of a name in a comma-separated list of names.
+ * List entries are checked from the start to the end of the names list,
+ * the first match ends further processing. If an entry prefixed with '-'
+ * matches, then 0 is returned. The "ALL" list entry is considered to
+ * match all names.
+ *
* @param name Name to look for.
* @param names List of names.
* @return 1 on match, 0 otherwise.