source file of the GNU LilyPond music typesetter
- (c) 1997--2000 Jan Nieuwenhuizen <janneke@gnu.org>
+ (c) 1997--2003 Jan Nieuwenhuizen <janneke@gnu.org>
*/
-#include "command-request.hh"
+
#include "audio-item.hh"
#include "performer.hh"
class Tempo_performer : public Performer
{
public:
- VIRTUAL_COPY_CONS(Translator);
-
- Tempo_performer();
- ~Tempo_performer();
+ TRANSLATOR_DECLARATIONS(Tempo_performer);
+ ~Tempo_performer ();
protected:
- virtual bool try_music (Music* req_l);
+ virtual bool try_music (Music* req);
virtual void stop_translation_timestep ();
virtual void create_audio_elements ();
private:
- Tempo_req* tempo_req_l_;
- Audio_tempo* audio_p_;
+Music* tempo_req_;
+ Audio_tempo* audio_;
};
-ADD_THIS_TRANSLATOR (Tempo_performer);
-
Tempo_performer::Tempo_performer ()
{
- tempo_req_l_ = 0;
- audio_p_ = 0;
+ tempo_req_ = 0;
+ audio_ = 0;
}
Tempo_performer::~Tempo_performer ()
void
Tempo_performer::create_audio_elements ()
{
- if (tempo_req_l_)
+ if (tempo_req_)
{
- SCM met = tempo_req_l_->get_mus_property ("metronome-count");
- Duration *d = unsmob_duration (tempo_req_l_->get_mus_property ("tempo"));
+ SCM met = tempo_req_->get_mus_property ("metronome-count");
+ Duration *d = unsmob_duration (tempo_req_->get_mus_property ("tempo-unit"));
+
+ Rational r = (d->get_length () / Moment (Rational (1, 4)) * Moment (gh_scm2int (met))).main_part_;
- audio_p_ = new Audio_tempo (d->length_mom () /
- Moment (1, 4)
- * Moment(gh_scm2int (met)));
+ audio_ = new Audio_tempo (int (r));
- Audio_element_info info (audio_p_, tempo_req_l_);
+ Audio_element_info info (audio_, tempo_req_);
announce_element (info);
- tempo_req_l_ = 0;
+ tempo_req_ = 0;
}
}
void
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::try_music (Music* req_l)
+Tempo_performer::try_music (Music* req)
{
- if (tempo_req_l_)
+ if (tempo_req_)
return false;
- if (Tempo_req *t =
- dynamic_cast <Tempo_req *> (req_l))
- {
- tempo_req_l_ = t;
+ tempo_req_ = req;
return true;
- }
-
- return false;
}
+
+
+
+ENTER_DESCRIPTION (Tempo_performer, "","",
+ "metronome-change-event",
+ "","","" );