release: 1.5.19

[lilypond.git] / lily / staff-performer.cc

diff --git a/lily/staff-performer.cc b/lily/staff-performer.cc
index 1609a571e114252aeaf0dcdb6be0b3f662f1d75d..a0ff4434309ff0c571f151fd36d48a398899a5a6 100644 (file)
--- a/lily/staff-performer.cc
+++ b/lily/staff-performer.cc
@@ -1,38 +1,152 @@
 /*
   staff-performer.cc -- implement Staff_performer
 
-  (c) 1996, 1997 Han-Wen Nienhuys <hanwen@stack.nl>
-                 Jan Nieuwenhuizen <jan@digicash.com>
- */
+  source file of the GNU LilyPond music typesetter
 
+  (c)  1997--2001 Jan Nieuwenhuizen <janneke@gnu.org>
+ */
 
-#include "staff-performer.hh"
-#include "translator.hh"
-#include "input-translator.hh"
+#include "translator-group.hh"
 #include "debug.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_str ();
+  String instrument_str_;
+
+protected:
+  virtual void play_element (Audio_element* p);
+  virtual void finalize ();
+  virtual void initialize ();
+  virtual void create_audio_elements ();
+  virtual void stop_translation_timestep ();
 
-IMPLEMENT_STATIC_NAME(Staff_performer);
-IMPLEMENT_IS_TYPE_B1(Staff_performer,Performer_group_performer);
-ADD_THIS_PERFORMER(Staff_performer);
+private:
+  Audio_staff* audio_staff_p_;
+  Audio_instrument* instrument_p_;
+  Audio_text* instrument_name_p_;
+  Audio_text* name_p_;
+  Audio_tempo* tempo_p_;
+};
 
-Staff_performer::Staff_performer()
+ENTER_DESCRIPTION (Staff_performer, "","","","","" );
+
+Staff_performer::Staff_performer ()
+{
+  audio_staff_p_ = 0;
+  instrument_p_ = 0;
+  instrument_name_p_ = 0;
+  name_p_ = 0;
+  tempo_p_ = 0;
+}
+
+Staff_performer::~Staff_performer ()
 {
 }
 
-Staff_performer::~Staff_performer()
+void
+Staff_performer::initialize ()
 {
+  audio_staff_p_ = new Audio_staff;
+  announce_element (Audio_element_info (audio_staff_p_, 0));
+
+  name_p_ = new Audio_text (Audio_text::TRACK_NAME, id_str_);
+  announce_element (Audio_element_info (name_p_, 0));
+
+  tempo_p_ = new Audio_tempo (get_tempo_i ());
+  announce_element (Audio_element_info (tempo_p_, 0));
+
+  Performer_group_performer::initialize ();
+}
+
+void
+Staff_performer::create_audio_elements ()
+{
+  String str = new_instrument_str ();
+  if (str.length_i ())
+    {
+      instrument_name_p_ = new Audio_text (Audio_text::INSTRUMENT_NAME, str);
+      announce_element (Audio_element_info (instrument_name_p_, 0));
+      instrument_p_ = new Audio_instrument (str);
+      announce_element (Audio_element_info (instrument_p_, 0));
+    }
+  Performer_group_performer::create_audio_elements ();
+}
+
+void
+Staff_performer::stop_translation_timestep ()
+{
+  SCM proc = scm_primitive_eval (ly_symbol2scm ("percussion-p")); 
+  SCM drums_p = gh_call1 (proc, ly_symbol2scm (instrument_str_.ch_C()));
+  audio_staff_p_->channel_i_ = (drums_p == SCM_BOOL_T ? 9 : -1 );
+  if (name_p_)
+    {
+      play_element (name_p_);
+      name_p_ = 0;
+    }
+  if (tempo_p_)
+    {
+      play_element (tempo_p_);
+      tempo_p_ = 0;
+    }
+  if (instrument_name_p_)
+    {
+      play_element (instrument_name_p_);
+      instrument_name_p_ = 0;
+    }
+  if (instrument_p_)
+    {
+      play_element (instrument_p_);
+      instrument_p_ = 0;
+    }
+  Performer_group_performer::stop_translation_timestep ();
+}
+
+void
+Staff_performer::finalize ()
+{
+  Performer_group_performer::finalize ();
+  Performer::play_element (audio_staff_p_);
+  audio_staff_p_ = 0;
 }
 
 String 
-Staff_performer::instrument_str() 
+Staff_performer::new_instrument_str () 
 { 
-    return Translator::id_str_; 
+  // mustn't ask Score for instrument: it will return piano!
+  SCM minstr = get_property ("midiInstrument");
+
+  if (!gh_string_p (minstr))
+    minstr = get_property ("instrument");
+
+  if (!gh_string_p (minstr)
+      || ly_scm2string (minstr) == instrument_str_)
+    return "";
+
+  instrument_str_ = ly_scm2string (minstr);
+
+  return instrument_str_;
 }
 
 void 
-Staff_performer::play_event( Midi_item* l )
+Staff_performer::play_element (Audio_element* p)
 {
-//    l.track_i_ = midi_track_i_;
-    Performer::play_event( l );
+  if (Audio_item *ai = dynamic_cast<Audio_item *> (p)) 
+    {
+      audio_staff_p_->add_audio_item (ai);
+    }
+  Performer::play_element (p);
 }