2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 2004--2010 Han-Wen Nienhuys
6 LilyPond is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 LilyPond is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
21 #include "dispatcher.hh"
22 #include "lily-guile.hh"
24 #include "music-iterator.hh"
25 #include "music-sequence.hh"
28 typedef enum Outlet_type
30 CONTEXT_ONE, CONTEXT_TWO,
31 CONTEXT_SHARED, CONTEXT_SOLO,
32 CONTEXT_NULL, NUM_OUTLETS
35 static const char *outlet_names_[NUM_OUTLETS] =
36 {"one", "two", "shared", "solo", "null"};
38 class Part_combine_iterator : public Music_iterator
41 Part_combine_iterator ();
43 DECLARE_SCHEME_CALLBACK (constructor, ());
45 virtual void derived_substitute (Context *f, Context *t);
46 virtual void derived_mark () const;
48 virtual void construct_children ();
49 virtual Moment pending_moment () const;
50 virtual void do_quit ();
51 virtual void process (Moment);
53 virtual bool ok () const;
56 /* used by try_process */
57 DECLARE_LISTENER (set_busy);
61 bool try_process (Music_iterator *i, Moment m);
63 Music_iterator *first_iter_;
64 Music_iterator *second_iter_;
69 Stream_event *unisono_event_;
70 Stream_event *solo_one_event_;
71 Stream_event *solo_two_event_;
72 Stream_event *mmrest_event_;
84 Status playing_state_;
87 Should be SOLO1 or SOLO2
92 TODO: this is getting of hand...
94 Context_handle handles_[NUM_OUTLETS];
96 void substitute_both (Outlet_type to1,
99 /* parameter is really Outlet_type */
100 void kill_mmrest (int in);
101 void chords_together ();
104 void apart (bool silent);
105 void unisono (bool silent);
109 Part_combine_iterator::do_quit ()
112 first_iter_->quit ();
114 second_iter_->quit ();
116 // Add listeners to all contexts except Devnull.
117 for (int i = 0; i < NUM_OUTLETS; i++)
119 Context *c = handles_[i].get_outlet ();
120 if (c->is_alias (ly_symbol2scm ("Voice")))
121 c->event_source ()->remove_listener (GET_LISTENER (set_busy), ly_symbol2scm ("music-event"));
122 handles_[i].set_context (0);
126 Part_combine_iterator::Part_combine_iterator ()
135 split_list_ = SCM_EOL;
137 playing_state_ = APART;
141 Part_combine_iterator::derived_mark () const
144 scm_gc_mark (first_iter_->self_scm ());
146 scm_gc_mark (second_iter_->self_scm ());
148 Stream_event *ptrs[] = {
155 for (int i = 0; ptrs[i]; i++)
157 scm_gc_mark (ptrs[i]->self_scm ());
161 Part_combine_iterator::derived_substitute (Context *f,
165 first_iter_->substitute_outlet (f, t);
169 Part_combine_iterator::pending_moment () const
173 if (first_iter_->ok ())
174 p = min (p, first_iter_->pending_moment ());
176 if (second_iter_->ok ())
177 p = min (p, second_iter_->pending_moment ());
182 Part_combine_iterator::ok () const
184 return first_iter_->ok () || second_iter_->ok ();
188 Part_combine_iterator::chords_together ()
190 if (state_ == TOGETHER)
194 playing_state_ = TOGETHER;
197 substitute_both (CONTEXT_SHARED, CONTEXT_SHARED);
202 Part_combine_iterator::kill_mmrest (int in)
207 mmrest_event_ = new Stream_event (ly_symbol2scm ("multi-measure-rest-event"));
208 mmrest_event_->set_property ("duration", SCM_EOL);
209 mmrest_event_->unprotect ();
212 handles_[in].get_outlet ()->event_source ()->broadcast (mmrest_event_);
216 Part_combine_iterator::solo1 ()
223 substitute_both (CONTEXT_SOLO, CONTEXT_NULL);
225 kill_mmrest (CONTEXT_TWO);
226 kill_mmrest (CONTEXT_SHARED);
228 if (playing_state_ != SOLO1)
230 if (!solo_one_event_)
232 solo_one_event_ = new Stream_event (ly_symbol2scm ("solo-one-event"));
233 solo_one_event_->unprotect ();
236 first_iter_->get_outlet ()->event_source ()->broadcast (solo_one_event_);
238 playing_state_ = SOLO1;
243 Part_combine_iterator::substitute_both (Outlet_type to1,
246 Outlet_type tos[] = {to1, to2};
248 Music_iterator *mis[] = {first_iter_, second_iter_};
250 for (int i = 0; i < 2; i++)
252 for (int j = 0; j < NUM_OUTLETS; j++)
254 mis[i]->substitute_outlet (handles_[j].get_outlet (), handles_[tos[i]].get_outlet ());
257 for (int j = 0; j < NUM_OUTLETS; j++)
259 if (j != to1 && j != to2)
265 Part_combine_iterator::unisono (bool silent)
267 Status newstate = (silent) ? UNISILENCE : UNISONO;
269 if (newstate == state_)
274 If we're coming from SOLO2 state, we might have kill mmrests
275 in the 1st voice, so in that case, we use the second voice
276 as a basis for events.
278 Outlet_type c1 = (last_playing_ == SOLO2) ? CONTEXT_NULL : CONTEXT_SHARED;
279 Outlet_type c2 = (last_playing_ == SOLO2) ? CONTEXT_SHARED : CONTEXT_NULL;
280 substitute_both (c1, c2);
281 kill_mmrest ((last_playing_ == SOLO2)
282 ? CONTEXT_ONE : CONTEXT_TWO);
283 kill_mmrest (CONTEXT_SHARED);
285 if (playing_state_ != UNISONO
286 && newstate == UNISONO)
290 unisono_event_ = new Stream_event (ly_symbol2scm ("unisono-event"));
291 unisono_event_->unprotect ();
295 Context *out = (last_playing_ == SOLO2 ? second_iter_ : first_iter_)
297 out->event_source ()->broadcast (unisono_event_);
298 playing_state_ = UNISONO;
305 Part_combine_iterator::solo2 ()
313 substitute_both (CONTEXT_NULL, CONTEXT_SOLO);
315 if (playing_state_ != SOLO2)
317 if (!solo_two_event_)
319 solo_two_event_ = new Stream_event (ly_symbol2scm ("solo-two-event"));
320 solo_two_event_->unprotect ();
323 second_iter_->get_outlet ()->event_source ()->broadcast (solo_two_event_);
324 playing_state_ = SOLO2;
330 Part_combine_iterator::apart (bool silent)
333 playing_state_ = APART;
340 substitute_both (CONTEXT_ONE, CONTEXT_TWO);
345 Part_combine_iterator::construct_children ()
347 start_moment_ = get_outlet ()->now_mom ();
348 split_list_ = get_music ()->get_property ("split-list");
350 Context *c = get_outlet ();
352 for (int i = 0; i < NUM_OUTLETS; i++)
354 SCM type = (i == CONTEXT_NULL) ? ly_symbol2scm ("Devnull") : ly_symbol2scm ("Voice");
355 /* find context below c: otherwise we may create new staff for each voice */
356 c = c->find_create_context (type, outlet_names_[i], SCM_EOL);
357 handles_[i].set_context (c);
358 if (c->is_alias (ly_symbol2scm ("Voice")))
359 c->event_source ()->add_listener (GET_LISTENER (set_busy), ly_symbol2scm ("music-event"));
362 SCM lst = get_music ()->get_property ("elements");
363 Context *one = handles_[CONTEXT_ONE].get_outlet ();
365 first_iter_ = unsmob_iterator (get_iterator (unsmob_music (scm_car (lst))));
366 Context *two = handles_[CONTEXT_TWO].get_outlet ();
368 second_iter_ = unsmob_iterator (get_iterator (unsmob_music (scm_cadr (lst))));
373 "DynamicLineSpanner",
383 for (char const **p = syms; *p; p++)
385 SCM sym = ly_symbol2scm (*p);
386 execute_pushpop_property (one, sym,
387 ly_symbol2scm ("direction"), scm_from_int (1));
389 execute_pushpop_property (two, sym,
390 ly_symbol2scm ("direction"), scm_from_int (-1));
394 IMPLEMENT_LISTENER (Part_combine_iterator, set_busy);
396 Part_combine_iterator::set_busy (SCM se)
401 Stream_event *e = unsmob_stream_event (se);
403 if (e->in_event_class ("note-event") || e->in_event_class ("cluster-note-event"))
408 Processes a moment in an iterator, and returns whether any new music
412 Part_combine_iterator::try_process (Music_iterator *i, Moment m)
419 notice_busy_ = false;
424 Part_combine_iterator::process (Moment m)
426 Moment now = get_outlet ()->now_mom ();
429 /* This is needed if construct_children was called before iteration
431 if (start_moment_.main_part_.is_infinity () && start_moment_ < 0)
434 for (; scm_is_pair (split_list_); split_list_ = scm_cdr (split_list_))
436 splitm = unsmob_moment (scm_caar (split_list_));
437 if (splitm && *splitm + start_moment_ > now)
440 SCM tag = scm_cdar (split_list_);
442 if (tag == ly_symbol2scm ("chords"))
444 else if (tag == ly_symbol2scm ("apart")
445 || tag == ly_symbol2scm ("apart-silence")
446 || tag == ly_symbol2scm ("apart-spanner"))
447 apart (tag == ly_symbol2scm ("apart-silence"));
448 else if (tag == ly_symbol2scm ("unisono"))
450 else if (tag == ly_symbol2scm ("unisilence"))
452 else if (tag == ly_symbol2scm ("solo1"))
454 else if (tag == ly_symbol2scm ("solo2"))
456 else if (scm_is_symbol (tag))
458 string s = "Unknown split directive: "
459 + (scm_is_symbol (tag) ? ly_symbol2string (tag) : string ("not a symbol"));
460 programming_error (s);
464 if (first_iter_->ok ())
466 if (try_process (first_iter_, m))
467 last_playing_ = SOLO1;
470 if (second_iter_->ok ())
472 if (try_process (second_iter_, m))
473 last_playing_ = SOLO2;
477 IMPLEMENT_CTOR_CALLBACK (Part_combine_iterator);