libavutil: drop offsetof() fallback definition

[ffmpeg] / libavfilter / internal.h

diff --git a/libavfilter/internal.h b/libavfilter/internal.h
index 954610e3cac291b9cba9fdaf723947a2cfd9ccae..6f868ae89fe66756a6210ced0d03d7e202716243 100644 (file)
--- a/libavfilter/internal.h
+++ b/libavfilter/internal.h
@@ -69,6 +69,9 @@ 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);
 
@@ -95,24 +98,32 @@ struct AVFilterPad {
      * in the link structure during start_frame().
      *
      * Input video pads only.
+     *
+     * @return >= 0 on success, a negative AVERROR on error.
      */
-    void (*end_frame)(AVFilterLink *link);
+    int (*end_frame)(AVFilterLink *link);
 
     /**
      * Slice drawing callback. This is where a filter receives video data
      * and should do its processing.
      *
      * Input video pads only.
+     *
+     * @return >= 0 on success, a negative AVERROR on error.
      */
-    void (*draw_slice)(AVFilterLink *link, int y, int height, int slice_dir);
+    int (*draw_slice)(AVFilterLink *link, int y, int height, int slice_dir);
 
     /**
      * Samples filtering callback. This is where a filter receives audio data
      * and should do its processing.
      *
      * Input audio pads only.
+     *
+     * @return >= 0 on success, a negative AVERROR on error. This function
+     * must ensure that samplesref is properly unreferenced on error if it
+     * hasn't been passed on to another filter.
      */
-    void (*filter_samples)(AVFilterLink *link, AVFilterBufferRef *samplesref);
+    int (*filter_samples)(AVFilterLink *link, AVFilterBufferRef *samplesref);
 
     /**
      * Frame poll callback. This returns the number of immediately available