+#include "performer-group-performer.hh"
+
+#include "audio-element.hh"
+#include "warn.hh"
+
+
+ENTER_DESCRIPTION(Performer_group_performer,
+/* descr */ "",
+/* creats*/ "",
+/* accepts */ "",
+/* acks */ "",
+/* reads */ "",
+/* write */ "");
+
+
+
+void
+Performer_group_performer::announce_element (Audio_element_info info)
+{
+ announce_infos_.push (info);
+ Performer::announce_element (info);
+}
+
+
+
+void
+Performer_group_performer::create_audio_elements ()
+{
+ for (SCM p = simple_trans_list_; gh_pair_p (p); p = ly_cdr (p))
+ {
+ Translator * t = unsmob_translator (ly_car (p));
+ Performer * eng = dynamic_cast<Performer*> (t);
+ if (eng)
+ eng->create_audio_elements ();
+ }
+}
+
+void
+Performer_group_performer::acknowledge_audio_elements ()
+{
+ for (int j =0; j < announce_infos_.size (); j++)
+ {
+ Audio_element_info info = announce_infos_[j];
+
+ for (SCM p = simple_trans_list_; gh_pair_p (p); p = ly_cdr (p))
+ {
+ Translator * t = unsmob_translator (ly_car (p));
+ Performer * eng = dynamic_cast<Performer*> (t);
+ if (eng && eng!= info.origin_trans_)
+ eng->acknowledge_audio_element (info);
+ }
+ }
+}
+
+void
+Performer_group_performer::do_announces ()
+{
+ for (SCM p = trans_group_list_; gh_pair_p (p); p =ly_cdr (p))
+ {
+ Translator * t = unsmob_translator (ly_car (p));
+ dynamic_cast<Performer_group_performer*> (t)->do_announces ();
+ }
+
+
+ create_audio_elements ();
+
+ while (announce_infos_.size ())
+ {
+ acknowledge_audio_elements ();
+ announce_infos_.clear ();
+ create_audio_elements ();
+ }
+
+ if (announce_infos_.size ())