libswscale/options: Add parent_log_context_offset to AVClass

This allows to associate log messages from slice contexts to
the user-visible SwsContext.

Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/libswscale/swscale_internal.h b/libswscale/swscale_internal.h
index fbfc08a89f..0d60dd2e6f 100644
--- a/libswscale/swscale_internal.h
+++ b/libswscale/swscale_internal.h
@@ -301,6 +301,8 @@ typedef struct SwsContext {
      */
     const AVClass *av_class;
 
+    struct SwsContext *parent;
+
     AVSliceThread      *slicethread;
     struct SwsContext **slice_ctx;
     int                *slice_err;