+#include "translator-group.hh"
+#include "warn.hh"
+#include "audio-column.hh"
+#include "audio-item.hh"
+#include "audio-staff.hh"
+#include "performer-group-performer.hh"
+
+/** Perform a staff. Individual notes should have their instrument
+ (staff-wide) set, so we override play_element ()
+
+ */
+class Staff_performer : public Performer_group_performer
+{
+public:
+ TRANSLATOR_DECLARATIONS(Staff_performer);
+ ~Staff_performer ();
+
+ String new_instrument_string ();
+ String instrument_string_;
+
+protected:
+ virtual void play_element (Audio_element* p);
+ virtual void finalize ();
+ virtual void initialize ();
+ virtual void create_audio_elements ();
+ virtual void stop_translation_timestep ();
+
+private:
+ Audio_staff* audio_staff_;
+ Audio_instrument* instrument_;
+ Audio_text* instrument_name_;
+ Audio_text* name_;
+ Audio_tempo* tempo_;
+};
+
+ENTER_DESCRIPTION (Staff_performer, "","","","","" );
+
+Staff_performer::Staff_performer ()
+{
+ audio_staff_ = 0;
+ instrument_ = 0;
+ instrument_name_ = 0;
+ name_ = 0;
+ tempo_ = 0;
+}
+
+Staff_performer::~Staff_performer ()
+{
+}
+
+void
+Staff_performer::initialize ()
+{
+ audio_staff_ = new Audio_staff;
+ announce_element (Audio_element_info (audio_staff_, 0));
+
+ name_ = new Audio_text (Audio_text::TRACK_NAME, id_string_);
+ announce_element (Audio_element_info (name_, 0));
+
+ tempo_ = new Audio_tempo (get_tempo ());
+ announce_element (Audio_element_info (tempo_, 0));
+
+ Performer_group_performer::initialize ();
+}
+
+void
+Staff_performer::create_audio_elements ()
+{
+ String str = new_instrument_string ();
+ if (str.length ())
+ {
+ instrument_name_ = new Audio_text (Audio_text::INSTRUMENT_NAME, str);
+ announce_element (Audio_element_info (instrument_name_, 0));
+ instrument_ = new Audio_instrument (str);
+ announce_element (Audio_element_info (instrument_, 0));
+ }
+ Performer_group_performer::create_audio_elements ();
+}
+
+void
+Staff_performer::stop_translation_timestep ()
+{
+ SCM proc = scm_primitive_eval (ly_symbol2scm ("percussion-p"));
+ SCM drums = gh_call1 (proc, ly_symbol2scm (instrument_string_.to_str0 ()));
+ audio_staff_->channel_ = (drums == SCM_BOOL_T ? 9 : -1 );
+ if (name_)
+ {
+ play_element (name_);
+ name_ = 0;
+ }
+ if (tempo_)
+ {
+ play_element (tempo_);
+ tempo_ = 0;
+ }
+ if (instrument_name_)
+ {
+ play_element (instrument_name_);
+ instrument_name_ = 0;
+ }
+ if (instrument_)
+ {
+ play_element (instrument_);
+ instrument_ = 0;
+ }
+ Performer_group_performer::stop_translation_timestep ();
+}