/*
- midi-walker.cc -- implement Midi_walker
+ This file is part of LilyPond, the GNU music typesetter.
- source file of the LilyPond music typesetter
+ Copyright (C) 1997--2012 Han-Wen Nienhuys <hanwen@xs4all.nl>
+ Jan Nieuwenhuizen <janneke@gnu.org>
- (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>, Jan Nieuwenhuizen <jan@digicash.com>
-
- TODO
+ 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.
- Ideally this should also use a register system, to process slurs,
- dynamics, etc.
-
+ 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 "command-request.hh"
-#include "musical-request.hh"
-#include "p-score.hh"
-#include "staff.hh"
#include "midi-walker.hh"
+
+#include "audio-column.hh"
+#include "audio-staff.hh"
#include "midi-item.hh"
+#include "midi-chunk.hh"
#include "midi-stream.hh"
-#include "debug.hh"
-#include "staff-column.hh"
+#include "warn.hh"
-Midi_walker::Midi_walker(Staff *st_l, Midi_track* track_l)
- : PCursor<Staff_column*>(st_l->cols_)
+Midi_note_event::Midi_note_event ()
{
- track_l_ = track_l;
- last_moment_= 0;
+ ignore_ = false;
+}
+
+int
+compare (Midi_note_event const &left, Midi_note_event const &right)
+{
+ Moment m = (left.key - right.key);
+
+ if (m < 0)
+ return -1;
+ else if (m > 0)
+ return 1;
+ else
+ return 0;
+}
+
+bool
+audio_item_less (Audio_item *const a,
+ Audio_item *const b)
+{
+ return a->get_column ()->when_ < b->get_column ()->when_;
+}
+
+Midi_walker::Midi_walker (Audio_staff *audio_staff, Midi_track *track)
+{
+ track_ = track;
+ index_ = 0;
+ items_ = audio_staff->audio_items_;
+ vector_sort (items_, audio_item_less);
+ last_tick_ = 0;
+ percussion_ = audio_staff->percussion_;
+ merge_unisons_ = audio_staff->merge_unisons_;
+}
+
+Midi_walker::~Midi_walker ()
+{
+ junk_pointers (midi_events_);
}
-/**
- output notestop events for all notes which end before #max_moment#
- */
void
-Midi_walker::do_stop_notes(Moment max_moment)
+Midi_walker::finalize ()
{
- while (stop_notes.size() && stop_notes.front().key <= max_moment) {
- Note_event ent=stop_notes.get();
- if (ent.ignore_b_)
- continue;
-
- Moment stop_moment = ent.key;
- Melodic_req * req_l = ent.val;
-
- Midi_note note(req_l, track_l_->number_i_, false);
- output_event(note, stop_moment);
- }
+ do_stop_notes (INT_MAX);
}
+
/**
- Find out if start_note event is needed, and do it if needed.
- */
-void
-Midi_walker::do_start_note(Note_req*note_l)
+ Find out if start_note event is needed, and do it if needed.
+*/
+void
+Midi_walker::do_start_note (Midi_note *note)
{
- Moment stop = note_l->duration() + ptr()->when();
- for(int i=0; i < stop_notes.size(); i++) {
- if (stop_notes[i].val->melodic()->pitch() ==
- note_l->pitch()) {
- if ( stop_notes[i].key < stop){
- stop_notes[i].ignore_b_=true;
- }
- else
- return; // skip the stop note
- }
+ Audio_item *ptr = items_[index_];
+ assert (note->audio_ == ptr);
+ int now_ticks = ptr->audio_column_->ticks ();
+ int stop_ticks = int (moment_to_real (note->audio_->length_mom_) *
+ Real (384 * 4)) + now_ticks;
+ for (vsize i = 0; i < stop_note_queue.size (); i++)
+ {
+ /* if this pitch already in queue */
+ if (stop_note_queue[i].val->get_semitone_pitch ()
+ == note->get_semitone_pitch ())
+ {
+ int queued_ticks
+ = stop_note_queue[i].val->audio_->audio_column_->ticks ();
+ // If the two notes started at the same time, or option is set,
+ if (now_ticks == queued_ticks || merge_unisons_)
+ {
+ // merge them.
+ if (stop_note_queue[i].key < stop_ticks)
+ {
+ Midi_note_event e;
+ e.val = stop_note_queue[i].val;
+ e.key = stop_ticks;
+ stop_note_queue[i].ignore_ = true;
+ stop_note_queue.insert (e);
+ }
+ note = 0;
+ break;
+ }
+ else
+ {
+ // A note was played that interruped a played note.
+ // Stop the old note, and continue to the greatest moment
+ // between the two.
+ if (stop_note_queue[i].key > stop_ticks)
+ {
+ stop_ticks = stop_note_queue[i].key;
+ }
+ output_event (now_ticks, stop_note_queue[i].val);
+ stop_note_queue[i].ignore_ = true;
+ break;
+ }
+ }
}
- Note_event e;
- e.val = note_l;
- e.key = stop;
-
- stop_notes.insert(e);
-
- Midi_note note(note_l, track_l_->number_i_, true);
- output_event(note, ptr()->when());
-}
+ if (note)
+ {
+ Midi_note_event e;
+ e.val = new Midi_note_off (note);
+
+ midi_events_.push_back (e.val);
+ e.key = stop_ticks;
+ stop_note_queue.insert (e);
+
+ output_event (now_ticks, note);
+ }
+}
-/** advance the track to #now#, output the item, and adjust current
- "moment". */
void
-Midi_walker::output_event(Midi_item &i, Moment now)
+Midi_walker::do_stop_notes (int max_ticks)
{
- Moment delta_t = now - last_moment_ ;
- last_moment_ += delta_t;
- track_l_->add(delta_t, &i );
+ while (stop_note_queue.size () && stop_note_queue.front ().key <= max_ticks)
+ {
+ Midi_note_event e = stop_note_queue.get ();
+ if (e.ignore_)
+ {
+ continue;
+ }
+
+ int stop_ticks = e.key;
+ Midi_note *note = e.val;
+
+ output_event (stop_ticks, note);
+ }
}
void
-Midi_walker::process_requests()
+Midi_walker::output_event (int now_ticks, Midi_item *l)
{
- do_stop_notes(ptr()->when());
-
- for ( int i = 0; i < ptr()->commandreq_l_arr_.size(); i++ ) {
- Command_req *c_l = ptr()->commandreq_l_arr_[i]->command();
- Meter_change_req* meter_l = c_l->meterchange();
- if ( meter_l )
- output_event( Midi_time( meter_l->beats_i_, meter_l->one_beat_i_, 18 ), ptr()->when() );
- Key_change_req* key_l = c_l->keychange();
- if ( key_l ) {
- int sharps_i = key_l->sharps_i();
- int flats_i = key_l->flats_i();
- // midi cannot handle non-conventional keys
- if ( !( flats_i && sharps_i ) )
- output_event( Midi_key( sharps_i - flats_i, key_l->minor_b() ), ptr()->when() );
- }
+ int delta_ticks = now_ticks - last_tick_;
+ last_tick_ = now_ticks;
+
+ /*
+ this is not correct, but at least it doesn't crash when you
+ start with graces
+ */
+ if (delta_ticks < 0)
+ {
+ programming_error ("Going back in MIDI time.");
+ delta_ticks = 0;
}
- for ( int i = 0; i < ptr()->musicalreq_l_arr_.size(); i++ ) {
- Rhythmic_req *n = ptr()->musicalreq_l_arr_[i]->rhythmic();
- if ( !n)
- continue;
- Note_req * note_l = n->note();
- if (!note_l)
- continue;
- do_start_note(note_l);
+ track_->add (delta_ticks, l);
+}
+
+void
+Midi_walker::process ()
+{
+ Audio_item *audio = items_[index_];
+ Audio_column *col = audio->get_column ();
+ do_stop_notes (col->ticks ());
+
+ if (Midi_item *midi = get_midi (audio))
+ {
+ if (Midi_note *note = dynamic_cast<Midi_note *> (midi))
+ {
+ if (note->audio_->length_mom_.to_bool ())
+ do_start_note (note);
+ }
+ else
+ output_event (audio->audio_column_->ticks (), midi);
}
}
-Midi_walker::~Midi_walker()
+Midi_item *
+Midi_walker::get_midi (Audio_item *i)
{
- do_stop_notes( last_moment_ + Moment(10,1)); // ugh
+ Midi_item *mi = Midi_item::get_midi (i);
+
+ if (percussion_)
+ if (Midi_channel_item *mci = dynamic_cast<Midi_channel_item *> (mi))
+ mci->channel_ = 9;
+
+ midi_events_.push_back (mi);
+ return mi;
}
+bool
+Midi_walker::ok () const
+{
+ return index_ < items_.size ();
+}
-int
-compare(Note_event const&e1, Note_event const&e2)
+void
+Midi_walker::operator ++(int)
{
- return sign(e1.key - e2.key);
+ assert (ok ());
+ index_++;
}
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