source file of the GNU LilyPond music typesetter
- (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>, Jan Nieuwenhuizen <jan@digicash.com>
-
- TODO
-
- Ideally this should also use a register system, to process slurs,
- dynamics, etc.
-
+ (c) 1997--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
+ Jan Nieuwenhuizen <janneke@gnu.org>
*/
-#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-stream.hh"
-#include "debug.hh"
-#include "staff-column.hh"
+#include "warn.hh"
+
+Midi_note_event::Midi_note_event ()
+{
+ ignore_b_ = 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;
+}
-Midi_walker::Midi_walker(Staff *st_l, Midi_track* track_l)
- : PCursor<Staff_column*>(st_l->cols_)
+Midi_walker::Midi_walker (Audio_staff *audio_staff, Midi_track *track)
{
- track_l_ = track_l;
- last_moment_= 0;
+ track_ = track;
+ index_ = 0;
+ items_ = &audio_staff->audio_items_;
+
+ last_mom_ = 0;
+}
+
+Midi_walker::~Midi_walker ()
+{
+ // ugh
+ do_stop_notes (last_mom_ + Moment (Rational (10, 1)));
}
/**
- output notestop events for all notes which end before #max_moment#
- */
+ Find out if start_note event is needed, and do it if needed.
+*/
void
-Midi_walker::do_stop_notes(Moment max_moment)
+Midi_walker::do_start_note (Midi_note *note)
{
- 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);
+ Audio_item *ptr = (*items_)[index_];
+ Moment stop_mom = note->get_length () + ptr->audio_column_->at_mom ();
+
+ bool play_start = true;
+ for (vsize i = 0; i < stop_note_queue.size (); i++)
+ {
+ /* if this pith already in queue */
+ if (stop_note_queue[i].val->get_pitch () == note->get_pitch ())
+ {
+ 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;
+ note = 0;
+ break;
+ }
+ }
+ }
+
+ if (note)
+ {
+ Midi_note_event e;
+ e.val = new Midi_note_off (note);
+ e.key = stop_mom;
+ stop_note_queue.insert (e);
+
+ if (play_start)
+ output_event (ptr->audio_column_->at_mom (), note);
}
}
+
/**
- Find out if start_note event is needed, and do it if needed.
- */
-void
-Midi_walker::do_start_note(Note_req*note_l)
+ Output note events for all notes which end before #max_mom#
+*/
+void
+Midi_walker::do_stop_notes (Moment max_mom)
{
- 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
+ while (stop_note_queue.size () && stop_note_queue.front ().key <= max_mom)
+ {
+ Midi_note_event e = stop_note_queue.get ();
+ if (e.ignore_b_)
+ {
+ delete e.val;
+ continue;
}
+
+ Moment stop_mom = e.key;
+ Midi_note *note = e.val;
+
+ output_event (stop_mom, note);
}
- 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());
}
-
-/** advance the track to #now#, output the item, and adjust current
- "moment". */
+/**
+ Advance the track to #now#, output the item, and adjust current "moment".
+*/
void
-Midi_walker::output_event(Midi_item &i, Moment now)
+Midi_walker::output_event (Moment now_mom, Midi_item *l)
{
- Moment delta_t = now - last_moment_ ;
- last_moment_ += delta_t;
- track_l_->add(delta_t, &i );
+ Moment delta_t = now_mom - last_mom_;
+ last_mom_ = now_mom;
+
+ /*
+ this is not correct, but at least it doesn't crash when you
+ start with graces
+ */
+ if (delta_t < Moment (0))
+ delta_t = Moment (0);
+
+ track_->add (delta_t, l);
}
void
-Midi_walker::process_requests()
+Midi_walker::process ()
{
- 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() );
- }
- }
+ Audio_item *audio = (*items_)[index_];
+ do_stop_notes (audio->audio_column_->at_mom ());
- 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);
+ if (Midi_item *midi = Midi_item::get_midi (audio))
+ {
+ midi->channel_ = track_->channel_;
+ //midi->channel_ = track_->number_;
+ if (Midi_note *note = dynamic_cast<Midi_note *> (midi))
+ {
+ if (note->get_length ().to_bool ())
+ do_start_note (note);
+ }
+ else
+ output_event (audio->audio_column_->at_mom (), midi);
}
}
-Midi_walker::~Midi_walker()
+bool
+Midi_walker::ok () const
{
- do_stop_notes( last_moment_ + Moment(10,1)); // ugh
+ 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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