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livetrax/gtk2_ardour/step_editor.cc

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/*
Copyright (C) 2012 Paul Davis
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., 675 Mass Ave, Cambridge, MA 02139, 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)
, step_editor (0)
, _mtv (mtv)
{
step_edit_insert_position = 0;
_step_edit_triplet_countdown = 0;
_step_edit_within_chord = 0;
_step_edit_chord_duration = Evoral::Beats();
step_edit_region_view = 0;
_track->PlaylistChanged.connect (*this, invalidator (*this),
boost::bind (&StepEditor::playlist_changed, this),
gui_context());
playlist_changed ();
}
StepEditor::~StepEditor()
{
delete step_editor;
}
void
StepEditor::start_step_editing ()
{
_step_edit_triplet_countdown = 0;
_step_edit_within_chord = 0;
_step_edit_chord_duration = Evoral::Beats();
step_edit_region.reset ();
step_edit_region_view = 0;
last_added_pitch = -1;
last_added_end = Evoral::Beats();
resync_step_edit_position ();
prepare_step_edit_region ();
reset_step_edit_beat_pos ();
assert (step_edit_region);
assert (step_edit_region_view);
if (step_editor == 0) {
step_editor = new StepEntry (*this);
step_editor->signal_delete_event().connect (sigc::mem_fun (*this, &StepEditor::step_editor_hidden));
step_editor->signal_hide().connect (sigc::mem_fun (*this, &StepEditor::step_editor_hide));
}
step_edit_region_view->show_step_edit_cursor (step_edit_beat_pos);
step_edit_region_view->set_step_edit_cursor_width (step_editor->note_length());
step_editor->present ();
}
void
StepEditor::resync_step_edit_position ()
{
step_edit_insert_position = _editor.get_preferred_edit_position ();
}
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 (step_edit_insert_position);
const Tempo& t = _mtv.session()->tempo_map().tempo_at (step_edit_insert_position);
step_edit_region = _mtv.add_region (step_edit_insert_position, floor (m.frames_per_bar (t, _mtv.session()->frame_rate())), 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);
framecnt_t frames_from_start = _editor.get_preferred_edit_position() - step_edit_region->position();
if (frames_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.
*/
frames_from_start = 0;
}
step_edit_beat_pos = step_edit_region_view->region_frames_to_region_beats (frames_from_start);
step_edit_region_view->move_step_edit_cursor (step_edit_beat_pos);
}
bool
StepEditor::step_editor_hidden (GdkEventAny*)
{
step_editor_hide ();
return true; // XXX remember position ?!
}
void
StepEditor::step_editor_hide ()
{
/* everything else will follow the change in the model */
_track->set_step_editing (false);
}
void
StepEditor::stop_step_editing ()
{
if (step_editor) {
step_editor->hide ();
}
if (step_edit_region_view) {
step_edit_region_view->hide_step_edit_cursor();
}
step_edit_region.reset ();
}
void
StepEditor::check_step_edit ()
{
MidiRingBuffer<framepos_t>& incoming (_track->step_edit_ring_buffer());
uint8_t* buf;
uint32_t bufsize = 32;
buf = new uint8_t[bufsize];
while (incoming.read_space()) {
framepos_t time;
Evoral::EventType type;
uint32_t size;
incoming.read_prefix (&time, &type, &size);
if (size > bufsize) {
delete [] buf;
bufsize = size;
buf = new uint8_t[bufsize];
}
incoming.read_contents (size, buf);
if ((buf[0] & 0xf0) == MIDI_CMD_NOTE_ON) {
step_add_note (buf[0] & 0xf, buf[1], buf[2], Evoral::Beats());
}
}
}
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 (Evoral::Beats beats)
{
if (step_edit_region_view) {
step_edit_region_view->step_sustain (beats);
}
}
void
StepEditor::move_step_edit_beat_pos (Evoral::Beats beats)
{
if (beats > 0.0) {
step_edit_beat_pos = min (step_edit_beat_pos + beats,
step_edit_region_view->region_frames_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 = Evoral::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, Evoral::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 (step_editor->note_length());
}
assert (step_edit_region);
assert (step_edit_region_view);
if (beat_duration == 0.0 && step_editor) {
beat_duration = step_editor->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 */
framepos_t fpos = step_edit_region_view->region_beats_to_absolute_frames (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));
}
Evoral::Beats at = step_edit_beat_pos;
Evoral::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 += Evoral::Beats::ticks(1);
len -= Evoral::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 += Evoral::Beats::ticks(1); // tiny, but no longer overlapping
_step_edit_chord_duration = max (_step_edit_chord_duration, beat_duration);
}
return 0;
}
void
StepEditor::set_step_edit_cursor_width (Evoral::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;
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 (Evoral::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_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();
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;
}
framepos_t fpos = step_edit_region_view->region_beats_to_absolute_frames (step_edit_beat_pos);
fpos = _session->tempo_map().round_to_bar (fpos, RoundUpAlways);
step_edit_beat_pos = step_edit_region_view->region_frames_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 = Evoral::Beats(-1);
}
}
string
StepEditor::name() const
{
return _track->name();
}
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