/*
- key-performer.cc -- implement Key_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--2003 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.
-#include "lily-guile.hh"
+ You should have received a copy of the GNU General Public License
+ along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
+*/
#include "audio-item.hh"
+#include "music-sequence.hh"
#include "performer.hh"
+#include "stream-event.hh"
#include "warn.hh"
+#include "lily-imports.hh"
+#include "translator.icc"
class Key_performer : public Performer
{
public:
- TRANSLATOR_DECLARATIONS(Key_performer);
+ TRANSLATOR_DECLARATIONS (Key_performer);
~Key_performer ();
protected:
- virtual bool try_music (Music* req);
- virtual void create_audio_elements ();
- virtual void stop_translation_timestep ();
+ void process_music ();
+ void stop_translation_timestep ();
+ void listen_key_change (Stream_event *);
private:
- Key_change_ev* key_req_;
- Audio_key* audio_;
+ Stream_event *key_ev_;
+ Audio_key *audio_;
};
-Key_performer::Key_performer ()
+Key_performer::Key_performer (Context *c)
+ : Performer (c)
{
- key_req_ = 0;
+ key_ev_ = 0;
audio_ = 0;
}
}
void
-Key_performer::create_audio_elements ()
+Key_performer::process_music ()
{
- if (key_req_)
+ if (key_ev_)
{
- SCM pitchlist = key_req_->get_mus_property ("pitch-alist");
- SCM proc = scm_primitive_eval (ly_symbol2scm ("accidentals-in-key"));
- SCM acc = gh_call1 (proc, pitchlist);
-
- Pitch key_do (0,
- gh_scm2int (ly_caar (pitchlist)),
- gh_scm2int (ly_cdar (pitchlist)));
-
- Pitch c_do (0, 0, 0);
-
+ SCM pitchlist = key_ev_->get_property ("pitch-alist");
+
+ SCM acc = Lily::alterations_in_key (pitchlist);
+
+ Pitch key_do (0,
+ scm_to_int (scm_caar (pitchlist)),
+ ly_scm2rational (scm_cdar (pitchlist)));
+
+ Pitch c_do;
+
SCM c_pitchlist
- = ly_transpose_key_alist (pitchlist,
- interval (key_do, c_do).smobbed_copy ());
+ = ly_transpose_key_alist (pitchlist,
+ pitch_interval (key_do, c_do).smobbed_copy ());
/* MIDI keys are too limited for lilypond scales.
- We check for minor scale and assume major otherwise. */
- SCM minor = scm_primitive_eval (ly_symbol2scm ("minor"));
- audio_ = new Audio_key (gh_scm2int (acc),
- SCM_BOOL_T != scm_equal_p (minor, c_pitchlist));
+ We check for minor scale and assume major otherwise. */
+
+ SCM third = scm_assoc (scm_from_int (2),
+ c_pitchlist);
+ bool minor = (scm_is_pair (third)
+ && scm_is_number (scm_cdr (third))
+ && ly_scm2rational (scm_cdr (third)) == FLAT_ALTERATION);
- Audio_element_info info (audio_, key_req_);
+ audio_ = new Audio_key (scm_to_int (acc),
+ !minor);
+
+ Audio_element_info info (audio_, key_ev_);
announce_element (info);
- key_req_ = 0;
+ key_ev_ = 0;
}
}
{
if (audio_)
{
- play_element (audio_);
audio_ = 0;
}
}
-bool
-Key_performer::try_music (Music* req)
+void
+Key_performer::listen_key_change (Stream_event *ev)
{
- if (Key_change_ev *kc = dynamic_cast <Key_change_ev *> (req))
- {
- if (key_req_)
- warning (_ ("FIXME: key change merge"));
-
- key_req_ = kc;
- return true;
- }
+ if (!key_ev_)
+ key_ev_ = ev;
+}
- return false;
+void
+Key_performer::boot ()
+{
+ ADD_LISTENER (Key_performer, key_change);
}
-ENTER_DESCRIPTION(Key_performer,
- "","",
- "key-change-event",
- "","","");
+ADD_TRANSLATOR (Key_performer,
+ /* doc */
+ "",
+
+ /* create */
+ "",
+
+ /* read */
+ "",
+
+ /* write */
+ ""
+ );