Run `make grand-replace'.

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

diff --git a/lily/tempo-performer.cc b/lily/tempo-performer.cc
index 3b57dccd47a297070ba09a7e24ce2345b343fc26..557e03c1aa612817c297641c59c4f3996715305c 100644 (file)
--- a/lily/tempo-performer.cc
+++ b/lily/tempo-performer.cc
@@ -3,85 +3,87 @@
 
   source file of the GNU LilyPond music typesetter
 
-  (c)  1997--2000 Jan Nieuwenhuizen <janneke@gnu.org>
+  (c) 1997--2008 Jan Nieuwenhuizen <janneke@gnu.org>
 */
 
-#include "command-request.hh"
-#include "audio-item.hh"
 #include "performer.hh"
 
+#include "audio-item.hh"
+#include "duration.hh"
+#include "stream-event.hh"
+
+#include "translator.icc"
+
 class Tempo_performer : public Performer
 {
 public:
-  VIRTUAL_COPY_CONS(Translator);
-  
-  Tempo_performer();
-  ~Tempo_performer();
+  TRANSLATOR_DECLARATIONS (Tempo_performer);
+  ~Tempo_performer ();
 
 protected:
 
-  virtual bool do_try_music (Music* req_l);
-  virtual void do_pre_move_processing ();
-  virtual void process_acknowledged ();
-
+  virtual void derived_mark () const; 
+  void stop_translation_timestep ();
+  void process_music ();
 private:
-  Tempo_req* tempo_req_l_;
-  Audio_tempo* audio_p_;
+  Audio_tempo *audio_;
+  SCM last_tempo_; 
 };
 
-ADD_THIS_TRANSLATOR (Tempo_performer);
+void
+Tempo_performer::derived_mark () const
+{
+  scm_gc_mark (last_tempo_);
+}
 
 Tempo_performer::Tempo_performer ()
 {
-  tempo_req_l_ = 0;
-  audio_p_ = 0;
+  last_tempo_ = SCM_EOL;
+  audio_ = 0;
 }
 
 Tempo_performer::~Tempo_performer ()
 {
 }
 
-
 void
-Tempo_performer::process_acknowledged ()
+Tempo_performer::process_music ()
 {
-  if (tempo_req_l_)
+  SCM w = get_property ("tempoWholesPerMinute");
+  if (unsmob_moment (w)
+      && !ly_is_equal (w, last_tempo_))
     {
+      Rational r = unsmob_moment (w)->main_part_;
+      r *= Rational (4, 1);
 
-      SCM met = tempo_req_l_->get_mus_property ("metronome-count");
-      audio_p_ = new Audio_tempo (tempo_req_l_->dur_.length_mom () /
-                                 Moment (1, 4) 
-                                 * Moment(gh_scm2int (met)));
+      audio_ = new Audio_tempo (r.to_int ());
 
-      Audio_element_info info (audio_p_, tempo_req_l_);
+      Audio_element_info info (audio_, 0);
       announce_element (info);
-      tempo_req_l_ = 0;
+
+      last_tempo_ = w;
     }
 }
 
 void
-Tempo_performer::do_pre_move_processing ()
+Tempo_performer::stop_translation_timestep ()
 {
-  if (audio_p_)
+  if (audio_)
     {
-      play_element (audio_p_);
-      audio_p_ = 0;
+      audio_ = 0;
     }
 }
 
-bool
-Tempo_performer::do_try_music (Music* req_l)
-{
-  if (tempo_req_l_)
-    return false;
+ADD_TRANSLATOR (Tempo_performer,
+               /* doc */
+               "",
 
-  if (Tempo_req *t =
-      dynamic_cast <Tempo_req *> (req_l))
-    {
-      tempo_req_l_ = t;
-      return true;
-    }
+               /* create */
+               "",
 
-  return false;
-}
+               /* read */
+               "tempoWholesPerMinute ",
 
+               /* write */
+               ""
+               );