AVOption enumeration support and some flags to classify AVOptions

Originally committed as revision 4568 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 6 insertions, 0 deletions

diff --git a/libavcodec/opt.c b/libavcodec/opt.c
index 4d49570930..f273c1607b 100644
--- a/libavcodec/opt.c
+++ b/libavcodec/opt.c
@@ -46,6 +46,12 @@ static AVOption *find_opt(void *v, const char *name){
     return NULL;
 }
 
+AVOption *av_next_option(void *obj, AVOption *last){
+    if(last && last[1].name) return ++last;
+    else if(last)            return NULL;
+    else                     return (*(AVClass**)obj)->option;
+}
+
 static int av_set_number(void *obj, const char *name, double num, int den, int64_t intnum){
     AVOption *o= find_opt(obj, name);
     void *dst;