From ebc8d974817fe456a0afe6867fdeb22c761fb04f Mon Sep 17 00:00:00 2001
From: Anton Khirnov <anton@khirnov.net>
Date: Sun, 8 Jul 2012 17:29:42 +0200
Subject: lavfi: add error handling to start_frame().

---
 libavfilter/avfilter.h | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'libavfilter/avfilter.h')

diff --git a/libavfilter/avfilter.h b/libavfilter/avfilter.h
index 7fbdd8a2fb..a685761cfb 100644
--- a/libavfilter/avfilter.h
+++ b/libavfilter/avfilter.h
@@ -258,8 +258,11 @@ struct AVFilterPad {
      * picture inside the link structure.
      *
      * Input video pads only.
+     *
+     * @return >= 0 on success, a negative AVERROR on error. picref will be
+     * unreferenced by the caller in case of error.
      */
-    void (*start_frame)(AVFilterLink *link, AVFilterBufferRef *picref);
+    int (*start_frame)(AVFilterLink *link, AVFilterBufferRef *picref);
 
     /**
      * Callback function to get a video buffer. If NULL, the filter system will
-- 
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