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livetrax/gtk2_ardour/step_editor.cc

455 lines
12 KiB
C++

/*
* Copyright (C) 2010-2011 Carl Hetherington <carl@carlh.net>
* Copyright (C) 2010-2018 Paul Davis <paul@linuxaudiosystems.com>
* Copyright (C) 2011-2015 David Robillard <d@drobilla.net>
* Copyright (C) 2013-2018 Robin Gareus <robin@gareus.org>
* Copyright (C) 2015-2017 Nick Mainsbridge <mainsbridge@gmail.com>
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "ardour/midi_track.h"
#include "ardour/midi_region.h"
#include "ardour/tempo.h"
#include "ardour/types.h"
#include "gui_thread.h"
#include "midi_region_view.h"
#include "public_editor.h"
#include "step_editor.h"
#include "step_entry.h"
using namespace ARDOUR;
using namespace Gtk;
using namespace std;
StepEditor::StepEditor (PublicEditor& e, boost::shared_ptr<MidiTrack> t, MidiTimeAxisView& mtv)
: _editor (e)
, _track (t)
, _mtv (mtv)
{
step_edit_insert_position = 0;
_step_edit_triplet_countdown = 0;
_step_edit_within_chord = 0;
_step_edit_chord_duration = Temporal::Beats();
step_edit_region_view = 0;
_track->PlaylistChanged.connect (*this, invalidator (*this),
boost::bind (&StepEditor::playlist_changed, this),
gui_context());
playlist_changed ();
}
StepEditor::~StepEditor()
{
StepEntry::instance().set_step_editor (0);
}
void
StepEditor::start_step_editing ()
{
_step_edit_triplet_countdown = 0;
_step_edit_within_chord = 0;
_step_edit_chord_duration = Temporal::Beats();
step_edit_region.reset ();
step_edit_region_view = 0;
last_added_pitch = -1;
last_added_end = Temporal::Beats();
resync_step_edit_position ();
prepare_step_edit_region ();
reset_step_edit_beat_pos ();
assert (step_edit_region);
assert (step_edit_region_view);
StepEntry::instance().set_step_editor (this);
delete_connection = StepEntry::instance().signal_delete_event().connect (sigc::mem_fun (*this, &StepEditor::step_entry_hidden));
hide_connection = StepEntry::instance(). signal_hide().connect (sigc::mem_fun (*this, &StepEditor::step_entry_done));
step_edit_region_view->show_step_edit_cursor (step_edit_beat_pos);
step_edit_region_view->set_step_edit_cursor_width (StepEntry::instance().note_length());
StepEntry::instance().present ();
}
void
StepEditor::resync_step_edit_position ()
{
step_edit_insert_position = _editor.get_preferred_edit_position (Editing::EDIT_IGNORE_NONE, false, true);
}
void
StepEditor::resync_step_edit_to_edit_point ()
{
resync_step_edit_position ();
if (step_edit_region) {
reset_step_edit_beat_pos ();
}
}
void
StepEditor::prepare_step_edit_region ()
{
boost::shared_ptr<Region> r = _track->playlist()->top_region_at (step_edit_insert_position);
if (r) {
step_edit_region = boost::dynamic_pointer_cast<MidiRegion>(r);
}
if (step_edit_region) {
RegionView* rv = _mtv.midi_view()->find_view (step_edit_region);
step_edit_region_view = dynamic_cast<MidiRegionView*> (rv);
} else {
const Meter& m = _mtv.session()->tempo_map().meter_at_sample (step_edit_insert_position);
double baf = max (0.0, _mtv.session()->tempo_map().beat_at_sample (step_edit_insert_position));
double next_bar_in_beats = baf + m.divisions_per_bar();
samplecnt_t next_bar_pos = _mtv.session()->tempo_map().sample_at_beat (next_bar_in_beats);
samplecnt_t len = next_bar_pos - step_edit_insert_position;
step_edit_region = _mtv.add_region (step_edit_insert_position, len, true);
RegionView* rv = _mtv.midi_view()->find_view (step_edit_region);
step_edit_region_view = dynamic_cast<MidiRegionView*>(rv);
}
}
void
StepEditor::reset_step_edit_beat_pos ()
{
assert (step_edit_region);
assert (step_edit_region_view);
samplecnt_t samples_from_start = _editor.get_preferred_edit_position() - step_edit_region->position();
if (samples_from_start < 0) {
/* this can happen with snap enabled, and the edit point == Playhead. we snap the
position of the new region, and it can end up after the edit point.
*/
samples_from_start = 0;
}
step_edit_beat_pos = step_edit_region_view->region_samples_to_region_beats (samples_from_start);
step_edit_region_view->move_step_edit_cursor (step_edit_beat_pos);
}
bool
StepEditor::step_entry_hidden (GdkEventAny*)
{
step_entry_done ();
return true;
}
void
StepEditor::step_entry_done ()
{
hide_connection.disconnect ();
delete_connection.disconnect ();
/* everything else will follow the change in the model */
_track->set_step_editing (false);
}
void
StepEditor::stop_step_editing ()
{
StepEntry::instance().hide ();
if (step_edit_region_view) {
step_edit_region_view->hide_step_edit_cursor();
}
step_edit_region.reset ();
}
void
StepEditor::check_step_edit ()
{
MidiRingBuffer<samplepos_t>& incoming (_track->step_edit_ring_buffer());
uint8_t* buf;
uint32_t bufsize = 32;
buf = new uint8_t[bufsize];
while (incoming.read_space()) {
samplepos_t time;
Evoral::EventType type;
uint32_t size;
if (!incoming.read_prefix (&time, &type, &size)) {
break;
}
if (size > bufsize) {
delete [] buf;
bufsize = size;
buf = new uint8_t[bufsize];
}
if (!incoming.read_contents (size, buf)) {
break;
}
if ((buf[0] & 0xf0) == MIDI_CMD_NOTE_ON && size == 3) {
step_add_note (buf[0] & 0xf, buf[1], buf[2], Temporal::Beats());
}
}
delete [] buf;
}
int
StepEditor::step_add_bank_change (uint8_t /*channel*/, uint8_t /*bank*/)
{
return 0;
}
int
StepEditor::step_add_program_change (uint8_t /*channel*/, uint8_t /*program*/)
{
return 0;
}
void
StepEditor::step_edit_sustain (Temporal::Beats beats)
{
if (step_edit_region_view) {
step_edit_region_view->step_sustain (beats);
}
}
void
StepEditor::move_step_edit_beat_pos (Temporal::Beats beats)
{
if (!step_edit_region_view) {
return;
}
if (beats > 0.0) {
step_edit_beat_pos = min (step_edit_beat_pos + beats,
step_edit_region_view->region_samples_to_region_beats (step_edit_region->length()));
} else if (beats < 0.0) {
if (-beats < step_edit_beat_pos) {
step_edit_beat_pos += beats; // its negative, remember
} else {
step_edit_beat_pos = Temporal::Beats();
}
}
step_edit_region_view->move_step_edit_cursor (step_edit_beat_pos);
}
int
StepEditor::step_add_note (uint8_t channel, uint8_t pitch, uint8_t velocity, Temporal::Beats beat_duration)
{
/* do these things in case undo removed the step edit region
*/
if (!step_edit_region) {
resync_step_edit_position ();
prepare_step_edit_region ();
reset_step_edit_beat_pos ();
step_edit_region_view->show_step_edit_cursor (step_edit_beat_pos);
step_edit_region_view->set_step_edit_cursor_width (StepEntry::instance().note_length());
}
assert (step_edit_region);
assert (step_edit_region_view);
if (beat_duration == 0.0) {
beat_duration = StepEntry::instance().note_length();
} else if (beat_duration == 0.0) {
bool success;
beat_duration = _editor.get_grid_type_as_beats (success, step_edit_insert_position);
if (!success) {
return -1;
}
}
MidiStreamView* msv = _mtv.midi_view();
/* make sure its visible on the vertical axis */
if (pitch < msv->lowest_note() || pitch > msv->highest_note()) {
msv->update_note_range (pitch);
msv->set_note_range (MidiStreamView::ContentsRange);
}
/* make sure its visible on the horizontal axis */
samplepos_t fpos = step_edit_region_view->region_beats_to_absolute_samples (step_edit_beat_pos + beat_duration);
if (fpos >= (_editor.leftmost_sample() + _editor.current_page_samples())) {
_editor.reset_x_origin (fpos - (_editor.current_page_samples()/4));
}
Temporal::Beats at = step_edit_beat_pos;
Temporal::Beats len = beat_duration;
if ((last_added_pitch >= 0) && (pitch == last_added_pitch) && (last_added_end == step_edit_beat_pos)) {
/* avoid any apparent note overlap - move the start of this note
up by 1 tick from where the last note ended
*/
at += Temporal::Beats::ticks(1);
len -= Temporal::Beats::ticks(1);
}
step_edit_region_view->step_add_note (channel, pitch, velocity, at, len);
last_added_pitch = pitch;
last_added_end = at+len;
if (_step_edit_triplet_countdown > 0) {
_step_edit_triplet_countdown--;
if (_step_edit_triplet_countdown == 0) {
_step_edit_triplet_countdown = 3;
}
}
if (!_step_edit_within_chord) {
step_edit_beat_pos += beat_duration;
step_edit_region_view->move_step_edit_cursor (step_edit_beat_pos);
} else {
step_edit_beat_pos += Temporal::Beats::ticks(1); // tiny, but no longer overlapping
_step_edit_chord_duration = max (_step_edit_chord_duration, beat_duration);
}
step_edit_region_view->set_step_edit_cursor_width (StepEntry::instance().note_length());
return 0;
}
void
StepEditor::set_step_edit_cursor_width (Temporal::Beats beats)
{
if (step_edit_region_view) {
step_edit_region_view->set_step_edit_cursor_width (beats);
}
}
bool
StepEditor::step_edit_within_triplet() const
{
return _step_edit_triplet_countdown > 0;
}
bool
StepEditor::step_edit_within_chord() const
{
return _step_edit_within_chord;
}
void
StepEditor::step_edit_toggle_triplet ()
{
if (_step_edit_triplet_countdown == 0) {
_step_edit_within_chord = false;
_step_edit_triplet_countdown = 3;
} else {
_step_edit_triplet_countdown = 0;
}
}
void
StepEditor::step_edit_toggle_chord ()
{
if (_step_edit_within_chord) {
_step_edit_within_chord = false;
if (step_edit_region_view) {
step_edit_beat_pos += _step_edit_chord_duration;
step_edit_region_view->move_step_edit_cursor (step_edit_beat_pos);
}
} else {
_step_edit_triplet_countdown = 0;
_step_edit_within_chord = true;
}
}
void
StepEditor::step_edit_rest (Temporal::Beats beats)
{
bool success;
if (beats == 0.0) {
beats = _editor.get_grid_type_as_beats (success, step_edit_insert_position);
} else {
success = true;
}
if (success && step_edit_region_view) {
step_edit_beat_pos += beats;
step_edit_region_view->move_step_edit_cursor (step_edit_beat_pos);
}
}
void
StepEditor::step_edit_beat_sync ()
{
step_edit_beat_pos = step_edit_beat_pos.round_up_to_beat();
if (step_edit_region_view) {
step_edit_region_view->move_step_edit_cursor (step_edit_beat_pos);
}
}
void
StepEditor::step_edit_bar_sync ()
{
Session* _session = _mtv.session ();
if (!_session || !step_edit_region_view || !step_edit_region) {
return;
}
samplepos_t fpos = step_edit_region_view->region_beats_to_absolute_samples (step_edit_beat_pos);
fpos = _session->tempo_map().round_to_bar (fpos, RoundUpAlways).sample;
step_edit_beat_pos = step_edit_region_view->region_samples_to_region_beats (fpos - step_edit_region->position()).round_up_to_beat();
step_edit_region_view->move_step_edit_cursor (step_edit_beat_pos);
}
void
StepEditor::playlist_changed ()
{
step_edit_region_connection.disconnect ();
_track->playlist()->RegionRemoved.connect (step_edit_region_connection, invalidator (*this),
boost::bind (&StepEditor::region_removed, this, _1),
gui_context());
}
void
StepEditor::region_removed (boost::weak_ptr<Region> wr)
{
boost::shared_ptr<Region> r (wr.lock());
if (!r) {
return;
}
if (step_edit_region == r) {
step_edit_region.reset();
step_edit_region_view = 0;
// force a recompute of the insert position
step_edit_beat_pos = Temporal::Beats::from_double (-1);
}
}
string
StepEditor::name() const
{
return _track->name();
}