/*
- midi-walker.cc -- implement Midi_walker
+ This file is part of LilyPond, the GNU music typesetter.
- source file of the GNU LilyPond music typesetter
+ Copyright (C) 1997--2014 Han-Wen Nienhuys <hanwen@xs4all.nl>
+ Jan Nieuwenhuizen <janneke@gnu.org>
- (c) 1997--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
- 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 "midi-walker.hh"
+
#include "audio-column.hh"
-#include "audio-item.hh"
#include "audio-staff.hh"
#include "midi-item.hh"
+#include "midi-chunk.hh"
#include "midi-stream.hh"
-#include "debug.hh"
+#include "warn.hh"
-Midi_note_event::Midi_note_event ()
-{
- ignore_b_ = false;
+Midi_note_event::Midi_note_event ()
+{
+ ignore_ = false;
}
int
-compare (Midi_note_event const& left, Midi_note_event const& right)
+compare (Midi_note_event const &left, Midi_note_event const &right)
{
- Moment m = (left.key - right.key);
+ Moment m = (left.key - right.key);
- if (m<0)
+ if (m < 0)
return -1;
else if (m > 0)
return 1;
return 0;
}
-Midi_walker::Midi_walker (Audio_staff* audio_staff_l, Midi_track* track_l)
+bool
+audio_item_less (Audio_item *const a,
+ Audio_item *const b)
{
- track_l_ = track_l;
- index_= 0;
- item_l_arr_l_ = &audio_staff_l->audio_item_l_arr_;
+ return a->get_column ()->when_ < b->get_column ()->when_;
+}
- last_mom_ = 0;
+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);
+ //Pieces that begin with grace notes start at negative times. This
+ //is OK - MIDI output doesn't use absolute ticks, only differences.
+ last_tick_ = items_.empty () ? 0 : items_[0]->audio_column_->ticks ();
+ percussion_ = audio_staff->percussion_;
+ merge_unisons_ = audio_staff->merge_unisons_;
}
Midi_walker::~Midi_walker ()
-{
- // ugh
- do_stop_notes (last_mom_ + Moment (Rational (10, 1)));
+{
+ junk_pointers (midi_events_);
}
-/**
- Find out if start_note event is needed, and do it if needed.
- */
-void
-Midi_walker::do_start_note (Midi_note* note_p)
+void
+Midi_walker::finalize ()
{
- Audio_item* ptr = (*item_l_arr_l_)[index_];
- Moment stop_mom = note_p->length_mom () + ptr->audio_column_l_->at_mom ();
+ do_stop_notes (INT_MAX);
+}
- bool play_start = true;
- for (int i=0; i < stop_note_queue.size (); i++)
+/**
+ Find out if start_note event is needed, and do it if needed.
+*/
+void
+Midi_walker::do_start_note (Midi_note *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 pith already in queue */
- if (stop_note_queue[i].val->pitch_i () == note_p->pitch_i ())
- {
- if (stop_note_queue[i].key < stop_mom)
- {
- /* let stopnote in queue be ignored,
- new stop note wins */
- stop_note_queue[i].ignore_b_ = true;
- /* don't replay start note, */
- play_start = false;
- break;
- }
- else
- {
- /* skip this stopnote,
- don't play the start note */
- delete note_p;
- note_p = 0;
- break;
- }
- }
+ /* 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;
+ }
+ }
}
- if (note_p)
+ if (note)
{
Midi_note_event e;
- e.val = new Midi_note_off (note_p);
- e.key = stop_mom;
+ e.val = new Midi_note_off (note);
+
+ midi_events_.push_back (e.val);
+ e.key = stop_ticks;
stop_note_queue.insert (e);
- if (play_start)
- output_event (ptr->audio_column_l_->at_mom (), note_p);
+ output_event (now_ticks, note);
}
}
-/**
- Output note events for all notes which end before #max_mom#
- */
void
-Midi_walker::do_stop_notes (Moment max_mom)
+Midi_walker::do_stop_notes (int max_ticks)
{
- while (stop_note_queue.size () && stop_note_queue.front ().key <= max_mom)
+ while (stop_note_queue.size () && stop_note_queue.front ().key <= max_ticks)
{
Midi_note_event e = stop_note_queue.get ();
- if (e.ignore_b_)
- {
- delete e.val;
- continue;
- }
-
- Moment stop_mom = e.key;
- Midi_note* note_p = e.val;
-
- output_event (stop_mom, note_p);
+ if (e.ignore_)
+ {
+ continue;
+ }
+
+ int stop_ticks = e.key;
+ Midi_note *note = e.val;
+
+ output_event (stop_ticks, note);
}
}
-/**
- Advance the track to #now#, output the item, and adjust current "moment".
- */
void
-Midi_walker::output_event (Moment now_mom, Midi_item* l)
+Midi_walker::output_event (int now_ticks, Midi_item *l)
{
- Moment delta_t = now_mom - last_mom_ ;
- last_mom_ = now_mom;
+ 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_t < Moment(0))
+ */
+ if (delta_ticks < 0)
{
- delta_t = Moment (0);
+ programming_error ("Going back in MIDI time.");
+ delta_ticks = 0;
}
-
- track_l_->add (delta_t, l);
+ track_->add (delta_ticks, l);
}
void
Midi_walker::process ()
{
- Audio_item* audio_p = (*item_l_arr_l_)[index_];
- do_stop_notes (audio_p->audio_column_l_->at_mom ());
+ Audio_item *audio = items_[index_];
+ Audio_column *col = audio->get_column ();
+ do_stop_notes (col->ticks ());
- if (Midi_item* midi_p = Midi_item::midi_p (audio_p))
+ if (Midi_item *midi = get_midi (audio))
{
- midi_p->channel_i_ = track_l_->channel_i_;
- //midi_p->channel_i_ = track_l_->number_i_;
- if (Midi_note* note_p = dynamic_cast<Midi_note*> (midi_p))
- {
- if (note_p->length_mom ().to_bool ())
- do_start_note (note_p);
- }
+ if (Midi_note *note = dynamic_cast<Midi_note *> (midi))
+ {
+ if (note->audio_->length_mom_.to_bool ())
+ do_start_note (note);
+ }
else
- output_event (audio_p->audio_column_l_->at_mom (), midi_p);
+ output_event (audio->audio_column_->ticks (), midi);
}
}
+Midi_item *
+Midi_walker::get_midi (Audio_item *i)
+{
+ 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_ <item_l_arr_l_->size ();
+ return index_ < items_.size ();
}
void
-Midi_walker::operator ++ (int)
+Midi_walker::operator ++(int)
{
assert (ok ());
index_++;
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