1 files changed, 15 insertions, 0 deletions
diff --git a/libavformat/avformat.c b/libavformat/avformat.c
index 78bec2f736..e3dad1f9a5 100644
--- a/libavformat/avformat.c
+++ b/libavformat/avformat.c
@@ -261,6 +261,21 @@ void av_program_add_stream_index(AVFormatContext *ac, int progid, unsigned idx)
     }
 }
 
+AVProgram *av_find_program_from_stream(AVFormatContext *ic, AVProgram *last, int s)
+{
+    for (unsigned i = 0; i < ic->nb_programs; i++) {
+        if (ic->programs[i] == last) {
+            last = NULL;
+        } else {
+            if (!last)
+                for (unsigned j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
+                    if (ic->programs[i]->stream_index[j] == s)
+                        return ic->programs[i];
+        }
+    }
+    return NULL;
+}
+
 /**
  * Matches a stream specifier (but ignores requested index).
  *