/*
- 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--2011 Jan Nieuwenhuizen <janneke@gnu.org>
- (c) 1997--2000 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 "key-performer.hh"
-#include "command-request.hh"
#include "audio-item.hh"
+#include "music-sequence.hh"
+#include "performer.hh"
+#include "stream-event.hh"
+#include "warn.hh"
+#include "translator.icc"
+class Key_performer : public Performer
+{
+public:
+ TRANSLATOR_DECLARATIONS (Key_performer);
+ ~Key_performer ();
+protected:
+ void process_music ();
+ void stop_translation_timestep ();
-ADD_THIS_TRANSLATOR (Key_performer);
+ DECLARE_TRANSLATOR_LISTENER (key_change);
+private:
+ Stream_event *key_ev_;
+ Audio_key *audio_;
+};
Key_performer::Key_performer ()
{
- key_req_l_ = 0;
- audio_p_ = 0;
+ key_ev_ = 0;
+ audio_ = 0;
}
Key_performer::~Key_performer ()
{
}
-void
-Key_performer::do_print () const
-{
-#ifndef NPRINT
- if (key_req_l_)
- key_req_l_->print ();
-#endif
-}
-
void
-Key_performer::do_process_music ()
+Key_performer::process_music ()
{
- if (key_req_l_)
+ if (key_ev_)
{
- audio_p_ = new Audio_key (key_req_l_->key_);
- Audio_element_info info (audio_p_, key_req_l_);
+ SCM pitchlist = key_ev_->get_property ("pitch-alist");
+ SCM proc = ly_lily_module_constant ("alterations-in-key");
+
+ SCM acc = scm_call_1 (proc, pitchlist);
+
+ Pitch key_do (0,
+ scm_to_int (scm_caar (pitchlist)),
+ ly_scm2rational (scm_cdar (pitchlist)));
+
+ Pitch c_do (0, 0, 0);
+
+ SCM c_pitchlist
+ = 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 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_ = new Audio_key (scm_to_int (acc),
+ !minor);
+
+ Audio_element_info info (audio_, key_ev_);
announce_element (info);
- key_req_l_ = 0;
+ key_ev_ = 0;
}
}
void
-Key_performer::do_pre_move_processing ()
+Key_performer::stop_translation_timestep ()
{
- if (audio_p_)
+ if (audio_)
{
- play_element (audio_p_);
- audio_p_ = 0;
+ audio_ = 0;
}
}
-bool
-Key_performer::do_try_music (Music* req_l)
+IMPLEMENT_TRANSLATOR_LISTENER (Key_performer, key_change);
+void
+Key_performer::listen_key_change (Stream_event *ev)
{
- if (Key_change_req *kc = dynamic_cast <Key_change_req *> (req_l))
- {
- if (key_req_l_)
- warning (_ ("FIXME: key change merge"));
+ if (!key_ev_)
+ key_ev_ = ev;
+}
- key_req_l_ = kc;
- return true;
- }
+ADD_TRANSLATOR (Key_performer,
+ /* doc */
+ "",
- return false;
-}
+ /* create */
+ "",
+
+ /* read */
+ "",
+ /* write */
+ ""
+ );