source file of the GNU LilyPond music typesetter
- (c) 1997--2000 Jan Nieuwenhuizen <janneke@gnu.org>
+ (c) 1997--2006 Jan Nieuwenhuizen <janneke@gnu.org>
*/
-#include "tempo-performer.hh"
-#include "command-request.hh"
+#include "performer.hh"
+
#include "audio-item.hh"
+#include "music.hh"
+#include "duration.hh"
+
+class Tempo_performer : public Performer
+{
+public:
+ TRANSLATOR_DECLARATIONS (Tempo_performer);
+ ~Tempo_performer ();
+
+protected:
-ADD_THIS_TRANSLATOR (Tempo_performer);
+ virtual bool try_music (Music *event);
+ void stop_translation_timestep ();
+ void process_music ();
+
+private:
+ Music *tempo_event_;
+ Audio_tempo *audio_;
+};
Tempo_performer::Tempo_performer ()
{
- tempo_req_l_ = 0;
- audio_p_ = 0;
+ tempo_event_ = 0;
+ audio_ = 0;
}
Tempo_performer::~Tempo_performer ()
{
}
-void
-Tempo_performer::do_print () const
-{
-#ifndef NPRINT
- if (tempo_req_l_)
- tempo_req_l_->print ();
-#endif
-}
-
void
-Tempo_performer::do_process_requests ()
+Tempo_performer::process_music ()
{
- if (tempo_req_l_)
+ if (tempo_event_)
{
- 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_);
+ SCM met = tempo_event_->get_property ("metronome-count");
+ Duration *d = unsmob_duration (tempo_event_->get_property ("tempo-unit"));
+
+ Rational r = (d->get_length () / Moment (Rational (1, 4)) * Moment (scm_to_int (met))).main_part_;
+
+ audio_ = new Audio_tempo (r.to_int ());
+
+ Audio_element_info info (audio_, tempo_event_);
announce_element (info);
- tempo_req_l_ = 0;
+ tempo_event_ = 0;
}
}
void
-Tempo_performer::do_pre_move_processing ()
+Tempo_performer::stop_translation_timestep ()
{
- if (audio_p_)
+ if (audio_)
{
- play_element (audio_p_);
- audio_p_ = 0;
+ play_element (audio_);
+ audio_ = 0;
}
}
bool
-Tempo_performer::do_try_music (Music* req_l)
+Tempo_performer::try_music (Music *event)
{
- if (tempo_req_l_)
+ if (tempo_event_)
return false;
- if (Tempo_req *t =
- dynamic_cast <Tempo_req *> (req_l))
- {
- tempo_req_l_ = t;
- return true;
- }
-
- return false;
+ tempo_event_ = event;
+ return true;
}
+#include "translator.icc"
+
+ADD_TRANSLATOR (Tempo_performer, "", "",
+ "metronome-change-event",
+ "", "");