Fix some bugs in the dynamic engraver and PostScript backend

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

diff --git a/lily/staff-performer.cc b/lily/staff-performer.cc
index 856551f90aeb460b3c4a2aed38e3ba80b643adee..b8facd23645e3abbad7fe2bb0a625ff08097a0ac 100644 (file)
--- a/lily/staff-performer.cc
+++ b/lily/staff-performer.cc
@@ -1,25 +1,148 @@
 /*
   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
 
-#if 0
+  (c) 1997--2006 Jan Nieuwenhuizen <janneke@gnu.org>
+*/
 
-#include "staff-performer.hh"
+#include "warn.hh"
+#include "audio-column.hh"
+#include "audio-item.hh"
+#include "audio-staff.hh"
+#include "performer-group.hh"
+#include "context.hh"
 
-String 
-Staff_performer::instrument_str() 
-{ 
-    return Translator::id_str_; 
+/** Perform a staff. Individual notes should have their instrument
+    (staff-wide) set, so we override play_element ()
+*/
+class Staff_performer : public Performer
+{
+public:
+  TRANSLATOR_DECLARATIONS (Staff_performer);
+  ~Staff_performer ();
+
+  string new_instrument_string ();
+  string instrument_string_;
+
+protected:
+  virtual void acknowledge_audio_element (Audio_element_info info);
+  virtual void finalize ();
+  virtual void initialize ();
+  void process_music ();
+  void stop_translation_timestep ();
+
+private:
+  Audio_staff *audio_staff_;
+  Audio_instrument *instrument_;
+  Audio_text *instrument_name_;
+  Audio_text *name_;
+  Audio_tempo *tempo_;
+};
+
+#include "translator.icc"
+
+ADD_TRANSLATOR (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;
+  name_ = new Audio_text (Audio_text::TRACK_NAME, context ()->id_string ());
+  tempo_ = new Audio_tempo (get_tempo ());
+
+  audio_staff_->add_audio_item (name_);
+  audio_staff_->add_audio_item (tempo_);
+  
+  announce_element (Audio_element_info (audio_staff_, 0));
+  announce_element (Audio_element_info (name_, 0));
+  announce_element (Audio_element_info (tempo_, 0));
+}
+
+void
+Staff_performer::process_music ()
+{
+  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));
+
+      audio_staff_->add_audio_item (instrument_);
+      audio_staff_->add_audio_item (instrument_name_);
+     
+      /*
+       Have to be here before notes arrive into the staff.
+      */
+      play_element (instrument_);
+      play_element (instrument_name_);
+    }
+}
+
+void
+Staff_performer::stop_translation_timestep ()
+{
+  SCM proc = ly_lily_module_constant ("percussion?");
+
+  SCM drums = scm_call_1 (proc, ly_symbol2scm (instrument_string_.c_str ()));
+  audio_staff_->channel_ = (drums == SCM_BOOL_T ? 9 : -1);
+  if (name_)
+    {
+      play_element (name_);
+      name_ = 0;
+    }
+  if (tempo_)
+    {
+      play_element (tempo_);
+      tempo_ = 0;
+    }
+  instrument_name_ = 0;
+  instrument_ = 0;
+}
+
+void
+Staff_performer::finalize ()
+{
+  Performer::play_element (audio_staff_);
+  audio_staff_ = 0;
+}
+
+string
+Staff_performer::new_instrument_string ()
+{
+  // mustn't ask Score for instrument: it will return piano!
+  SCM minstr = get_property ("midiInstrument");
+
+  if (!scm_is_string (minstr)
+      || ly_scm2string (minstr) == instrument_string_)
+    return "";
+
+  instrument_string_ = ly_scm2string (minstr);
+
+  return instrument_string_;
 }
 
-void 
-Staff_performer::play_event( Midi_item i )
+void
+Staff_performer::acknowledge_audio_element (Audio_element_info inf)
 {
-    i.track_i_ = midi_track_i_;
-    Performer::play_event( i );
+  if (Audio_item *ai = dynamic_cast<Audio_item *> (inf.elem_))
+    audio_staff_->add_audio_item (ai);
 }
 
-#endif