+bool VideoEncoder::is_zerocopy() const
+{
+ // Explicitly do _not_ take qs_mu; this is called from the mixer,
+ // and qs_mu might be contended. is_zerocopy() is thread safe
+ // and never called in parallel with do_cut() (both happen only
+ // from the mixer thread).
+ return quicksync_encoder->is_zerocopy();
+}
+