fix math bug with numthreads computation
[ardour2.git] / gtk2_ardour / audio_region_editor.cc
blobbade9b27d9a04e69cbd0bb5540faf0c388c42c3c
1 /*
2 Copyright (C) 2001 Paul Davis
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #include "pbd/memento_command.h"
21 #include "pbd/stateful_diff_command.h"
23 #include "ardour/session.h"
24 #include "ardour/audioregion.h"
25 #include "ardour/playlist.h"
26 #include "ardour/utils.h"
27 #include "ardour/dB.h"
28 #include <gtkmm2ext/utils.h>
29 #include <cmath>
31 #include "audio_region_editor.h"
32 #include "audio_region_view.h"
33 #include "ardour_ui.h"
34 #include "utils.h"
35 #include "gui_thread.h"
37 #include "i18n.h"
39 using namespace ARDOUR;
40 using namespace PBD;
41 using namespace std;
42 using namespace Gtkmm2ext;
44 AudioRegionEditor::AudioRegionEditor (Session* s, boost::shared_ptr<AudioRegion> r)
45 : RegionEditor (s, r)
46 , _audio_region (r)
47 , gain_adjustment(accurate_coefficient_to_dB(_audio_region->scale_amplitude()), -40.0, +40.0, 0.1, 1.0, 0)
50 gain_label.set_alignment (1, 0.5);
52 Gtk::HBox* gb = Gtk::manage (new Gtk::HBox);
53 gb->set_spacing (6);
54 gb->pack_start (gain_entry);
55 gb->pack_start (*Gtk::manage (new Gtk::Label (_("dB"))), false, false);
57 gain_label.set_name ("AudioRegionEditorLabel");
58 gain_label.set_text (_("Region gain:"));
59 gain_entry.configure (gain_adjustment, 0.0, 1);
60 _table.attach (gain_label, 0, 1, 7, 8, Gtk::FILL, Gtk::FILL);
61 _table.attach (*gb, 1, 2, 7, 8, Gtk::FILL, Gtk::FILL);
63 gain_changed ();
65 gain_adjustment.signal_value_changed().connect (sigc::mem_fun (*this, &AudioRegionEditor::gain_adjustment_changed));
68 void
69 AudioRegionEditor::region_changed (const PBD::PropertyChange& what_changed)
71 RegionEditor::region_changed (what_changed);
73 if (what_changed.contains (ARDOUR::Properties::scale_amplitude)) {
74 gain_changed ();
77 void
78 AudioRegionEditor::gain_changed ()
80 float const region_gain_dB = accurate_coefficient_to_dB (_audio_region->scale_amplitude());
81 if (region_gain_dB != gain_adjustment.get_value()) {
82 gain_adjustment.set_value(region_gain_dB);
86 void
87 AudioRegionEditor::gain_adjustment_changed ()
89 float const gain = dB_to_coefficient (gain_adjustment.get_value());
90 if (_audio_region->scale_amplitude() != gain) {
91 _audio_region->set_scale_amplitude (gain);