Make it possible for a log context to keep track of its parent context.

This is usefull to keep track and display relations where things are a
bit more complex (like AVProtocols or demuxers used by demuxers and such)

Originally committed as revision 23199 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 8 insertions, 0 deletions

diff --git a/libavutil/log.h b/libavutil/log.h
index a21adb8586..0a413f6e8c 100644
--- a/libavutil/log.h
+++ b/libavutil/log.h
@@ -62,6 +62,14 @@ typedef struct {
      * 0 means there is no such variable
      */
     int log_level_offset_offset;
+
+    /**
+     * Offset in the structure where a pointer to the parent context for loging is stored.
+     * for example a decoder that uses eval.c could pass its AVCodecContext to eval as such
+     * parent context. And a av_log() implementation could then display the parent context
+     * can be NULL of course
+     */
+    int parent_log_context_offset;
 } AVClass;
 
 /* av_log API */