X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Ftempo-performer.cc;h=967ae60e7067b7e6b803d85a81479690331f898c;hb=5d84bfad4626892bcffd05adcced53c8a2329047;hp=b728730947e1093b77cbe9470cb78e98f1a7122c;hpb=fbb6d20e9f58d691ffe845284cbb4d8bacf9ca60;p=lilypond.git

diff --git a/lily/tempo-performer.cc b/lily/tempo-performer.cc
index b728730947..967ae60e70 100644
--- a/lily/tempo-performer.cc
+++ b/lily/tempo-performer.cc
@@ -1,73 +1,107 @@
 /*
-  tempo-performer.cc -- implement Tempo_performer
+  This file is part of LilyPond, the GNU music typesetter.
 
-  source file of the GNU LilyPond music typesetter
+  Copyright (C) 1997--2015 Jan Nieuwenhuizen <janneke@gnu.org>
 
-  (c)  1997--2000 Jan Nieuwenhuizen <janneke@gnu.org>
+  LilyPond is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  LilyPond is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-#include "tempo-performer.hh"
-#include "command-request.hh"
+#include "performer.hh"
+
 #include "audio-item.hh"
+#include "duration.hh"
+#include "stream-event.hh"
+
+#include "translator.icc"
+
+class Tempo_performer : public Performer
+{
+public:
+  TRANSLATOR_DECLARATIONS (Tempo_performer);
+  ~Tempo_performer ();
+
+protected:
 
-ADD_THIS_TRANSLATOR (Tempo_performer);
+  virtual void derived_mark () const;
+  void stop_translation_timestep ();
+  void process_music ();
+private:
+  Audio_tempo *audio_;
+  SCM last_tempo_;
+};
 
-Tempo_performer::Tempo_performer ()
+void
+Tempo_performer::derived_mark () const
 {
-  tempo_req_l_ = 0;
-  audio_p_ = 0;
+  scm_gc_mark (last_tempo_);
 }
 
-Tempo_performer::~Tempo_performer ()
+Tempo_performer::Tempo_performer (Context *c)
+  : Performer (c)
 {
+  last_tempo_ = SCM_EOL;
+  audio_ = 0;
 }
 
-void 
-Tempo_performer::do_print () const
+Tempo_performer::~Tempo_performer ()
 {
-#ifndef NPRINT
-  if (tempo_req_l_)
-    tempo_req_l_->print ();
-#endif
 }
 
 void
-Tempo_performer::do_process_music ()
+Tempo_performer::process_music ()
 {
-  if (tempo_req_l_)
+  SCM w = get_property ("tempoWholesPerMinute");
+  if (unsmob<Moment> (w)
+      && !ly_is_equal (w, last_tempo_))
     {
-      audio_p_ = new Audio_tempo (tempo_req_l_->dur_.length_mom () /
-				  Moment (1, 4) 
-				  * Moment(tempo_req_l_->metronome_i_));
-      Audio_element_info info (audio_p_, tempo_req_l_);
+      Rational r = unsmob<Moment> (w)->main_part_;
+      r *= Rational (4, 1);
+
+      audio_ = new Audio_tempo (r.to_int ());
+
+      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)
+void
+Tempo_performer::boot ()
 {
-  if (tempo_req_l_)
-    return false;
-
-  if (Tempo_req *t =
-      dynamic_cast <Tempo_req *> (req_l))
-    {
-      tempo_req_l_ = t;
-      return true;
-    }
 
-  return false;
 }
 
+ADD_TRANSLATOR (Tempo_performer,
+                /* doc */
+                "",
+
+                /* create */
+                "",
+
+                /* read */
+                "tempoWholesPerMinute ",
+
+                /* write */
+                ""
+               );