2 tempo-performer.cc -- implement Tempo_performer
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2000 Jan Nieuwenhuizen <janneke@gnu.org>
9 #include "command-request.hh"
10 #include "audio-item.hh"
11 #include "performer.hh"
13 class Tempo_performer
: public Performer
16 VIRTUAL_COPY_CONS(Translator
);
23 virtual bool try_music (Music
* req_l
);
24 virtual void stop_translation_timestep ();
25 virtual void create_audio_elements ();
28 Tempo_req
* tempo_req_l_
;
29 Audio_tempo
* audio_p_
;
32 ADD_THIS_TRANSLATOR (Tempo_performer
);
34 Tempo_performer::Tempo_performer ()
40 Tempo_performer::~Tempo_performer ()
46 Tempo_performer::create_audio_elements ()
51 SCM met
= tempo_req_l_
->get_mus_property ("metronome-count");
52 Duration
*d
= unsmob_duration (tempo_req_l_
->get_mus_property ("tempo"));
54 audio_p_
= new Audio_tempo (d
->length_mom () /
56 * Moment(gh_scm2int (met
)));
58 Audio_element_info
info (audio_p_
, tempo_req_l_
);
59 announce_element (info
);
65 Tempo_performer::stop_translation_timestep ()
69 play_element (audio_p_
);
75 Tempo_performer::try_music (Music
* req_l
)
81 dynamic_cast <Tempo_req
*> (req_l
))