/*
- 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--2006 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 "music-sequence.hh"
#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
{
~Key_performer ();
protected:
- virtual bool try_music (Music *ev);
void process_music ();
void stop_translation_timestep ();
+ void listen_key_change (Stream_event *);
private:
- Music *key_ev_;
+ Stream_event *key_ev_;
Audio_key *audio_;
};
-Key_performer::Key_performer ()
+Key_performer::Key_performer (Context *c)
+ : Performer (c)
{
key_ev_ = 0;
audio_ = 0;
if (key_ev_)
{
SCM pitchlist = key_ev_->get_property ("pitch-alist");
- SCM proc = ly_lily_module_constant ("alterations-in-key");
- SCM acc = scm_call_1 (proc, pitchlist);
+ SCM acc = Lily::alterations_in_key (pitchlist);
Pitch key_do (0,
- scm_to_int (scm_caar (pitchlist)),
- scm_to_int (scm_cdar (pitchlist)));
+ scm_to_int (scm_caar (pitchlist)),
+ ly_scm2rational (scm_cdar (pitchlist)));
- Pitch c_do (0, 0, 0);
+ Pitch c_do;
SCM c_pitchlist
- = ly_transpose_key_alist (pitchlist,
- pitch_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. */
+ We check for minor scale and assume major otherwise. */
SCM third = scm_assoc (scm_from_int (2),
- c_pitchlist);
+ c_pitchlist);
bool minor = (scm_is_pair (third)
- && scm_is_integer (scm_cdr (third))
- && scm_to_int (scm_cdr (third)) == FLAT);
+ && scm_is_number (scm_cdr (third))
+ && ly_scm2rational (scm_cdr (third)) == FLAT_ALTERATION);
audio_ = new Audio_key (scm_to_int (acc),
- !minor);
+ !minor);
Audio_element_info info (audio_, key_ev_);
announce_element (info);
{
if (audio_)
{
- play_element (audio_);
audio_ = 0;
}
}
-bool
-Key_performer::try_music (Music *ev)
+void
+Key_performer::listen_key_change (Stream_event *ev)
{
if (!key_ev_)
key_ev_ = ev;
-
- return true;
}
-#include "translator.icc"
+void
+Key_performer::boot ()
+{
+ ADD_LISTENER (Key_performer, key_change);
+}
ADD_TRANSLATOR (Key_performer,
- "", "",
- "key-change-event",
- "", "");
+ /* doc */
+ "",
+
+ /* create */
+ "",
+
+ /* read */
+ "",
+
+ /* write */
+ ""
+ );