+#define SUBSCRIPTS(subs, ...) (subs > 0 ? ((int[subs + 1]){ subs, __VA_ARGS__ }) : NULL)
+
+#define u(width, name, range_min, range_max) \
+ xu(width, name, current->name, range_min, range_max, 0)
+#define flag(name) u(1, name, 0, 1)
+#define ue(name, range_min, range_max) \
+ xue(name, current->name, range_min, range_max, 0)
+#define se(name, range_min, range_max) \
+ xse(name, current->name, range_min, range_max, 0)
+
+#define us(width, name, range_min, range_max, subs, ...) \
+ xu(width, name, current->name, range_min, range_max, subs, __VA_ARGS__)
+#define flags(name, subs, ...) \
+ xu(1, name, current->name, 0, 1, subs, __VA_ARGS__)
+#define ues(name, range_min, range_max, subs, ...) \
+ xue(name, current->name, range_min, range_max, subs, __VA_ARGS__)
+#define ses(name, range_min, range_max, subs, ...) \
+ xse(name, current->name, range_min, range_max, subs, __VA_ARGS__)
+
+#define fixed(width, name, value) do { \
+ av_unused uint32_t fixed_value = value; \
+ xu(width, name, fixed_value, value, value, 0); \
+ } while (0)
+