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 3605653c38322625cd9ef718cc023baefe8e65df..b8facd23645e3abbad7fe2bb0a625ff08097a0ac 100644 (file)
--- a/lily/staff-performer.cc
+++ b/lily/staff-performer.cc
@@ -3,67 +3,146 @@
 
   source file of the GNU LilyPond music typesetter
 
-  (c) 1997 Jan Nieuwenhuizen <jan@digicash.com>
- */
+  (c) 1997--2006 Jan Nieuwenhuizen <janneke@gnu.org>
+*/
 
-#include "staff-performer.hh"
-#include "translator.hh"
-#include "input-translator.hh"
-#include "debug.hh"
+#include "warn.hh"
 #include "audio-column.hh"
 #include "audio-item.hh"
 #include "audio-staff.hh"
+#include "performer-group.hh"
+#include "context.hh"
 
-IMPLEMENT_IS_TYPE_B1(Staff_performer,Performer_group_performer);
-ADD_THIS_PERFORMER(Staff_performer);
+/** 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()
+Staff_performer::Staff_performer ()
 {
-    audio_staff_p_ = 0;
+  audio_staff_ = 0;
+  instrument_ = 0;
+  instrument_name_ = 0;
+  name_ = 0;
+  tempo_ = 0;
 }
 
-Staff_performer::~Staff_performer()
+Staff_performer::~Staff_performer ()
 {
-    delete audio_staff_p_;
 }
 
 void
-Staff_performer::do_creation_processing()
+Staff_performer::initialize ()
 {
-    audio_staff_p_ = new Audio_staff;
+  audio_staff_ = new Audio_staff;
+  name_ = new Audio_text (Audio_text::TRACK_NAME, context ()->id_string ());
+  tempo_ = new Audio_tempo (get_tempo ());
 
-    // staff name
-    play(new Audio_text( Audio_text::TRACK_NAME, instrument_str()));
+  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));
+}
 
-    // instrument description
-    play(new Audio_text( Audio_text::INSTRUMENT_NAME, instrument_str()));
+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_);
+    }
+}
 
-    // tempo
-    play(new Audio_tempo(get_tempo_i()));
+void
+Staff_performer::stop_translation_timestep ()
+{
+  SCM proc = ly_lily_module_constant ("percussion?");
 
-    // instrument
-    play(new Audio_instrument(instrument_str()));
+  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::do_removal_processing()
+Staff_performer::finalize ()
 {
-    Performer::play( audio_staff_p_ );
-    audio_staff_p_ = 0;
+  Performer::play_element (audio_staff_);
+  audio_staff_ = 0;
 }
 
-String 
-Staff_performer::instrument_str() 
-{ 
-    return Translator::id_str_; 
+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( Audio_element* p )
+void
+Staff_performer::acknowledge_audio_element (Audio_element_info inf)
 {
-    if (p->is_type_b(Audio_item::static_name())) {
-       audio_staff_p_->add((Audio_item*)p);
-    }
-    Performer::play(p);
+  if (Audio_item *ai = dynamic_cast<Audio_item *> (inf.elem_))
+    audio_staff_->add_audio_item (ai);
 }