+ // Similar to alloc_frame(), with two additional restrictions:
+ //
+ // - The width, height and stride given must be correct
+ // (can not be changed after the call).
+ // - create_frame(), unlike alloc_frame(), is allowed to sleep
+ // (so bmusb will never call it, but in Nageru, other producers
+ // might)
+ //
+ // These two restrictions are relevant for Nageru, since it means that
+ // it can make frame_copy point directly into a VA-API buffer to avoid
+ // an extra copy.
+ virtual Frame create_frame(size_t width, size_t height, size_t stride)
+ {
+ return alloc_frame();
+ }
+