lavu/internal: add FF_FIELD_AT().

3 years ago · 1d8e1afc00
parent 1c5610824a
commit 1d8e1afc00
1 changed files with 5 additions and 0 deletions
--- a/libavutil/internal.h
+++ b/libavutil/internal.h
@ -99,6 +99,11 @@

 #define FF_PTR_ADD(ptr, off) ((off) ? (ptr) + (off) : (ptr))

+/**
+ * Access a field in a structure by its offset.
+ */
+#define FF_FIELD_AT(type, off, obj) (*(type *)((char *)&(obj) + (off)))
+
 #include "libm.h"

 /**