gtk2_ardour/audio_region_editor.cc

   1 /*
   2     Copyright (C) 2001 Paul Davis
   3
   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.
   8
   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.
  13
  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.
  17
  18 */
  19
  20 #include "pbd/memento_command.h"
  21 #include "pbd/stateful_diff_command.h"
  22 #include "pbd/pthread_utils.h"
  23
  24 #include "ardour/session.h"
  25 #include "ardour/audioregion.h"
  26 #include "ardour/playlist.h"
  27 #include "ardour/utils.h"
  28 #include "ardour/dB.h"
  29 #include <gtkmm2ext/utils.h>
  30 #include <cmath>
  31
  32 #include "audio_region_editor.h"
  33 #include "audio_region_view.h"
  34 #include "ardour_ui.h"
  35 #include "utils.h"
  36 #include "gui_thread.h"
  37
  38 #include "i18n.h"
  39
  40 using namespace ARDOUR;
  41 using namespace PBD;
  42 using namespace std;
  43 using namespace Gtkmm2ext;
  44
  45 static void *
  46 _peak_amplitude_thread (void* arg)
  47 {
  48         SessionEvent::create_per_thread_pool ("peak amplitude events", 64);
  49         static_cast<AudioRegionEditor*>(arg)->peak_amplitude_thread ();
  50         return 0;
  51 }
  52
  53 AudioRegionEditor::AudioRegionEditor (Session* s, boost::shared_ptr<AudioRegion> r)
  54         : RegionEditor (s, r)
  55         , _audio_region (r)
  56         , gain_adjustment(accurate_coefficient_to_dB(_audio_region->scale_amplitude()), -40.0, +40.0, 0.1, 1.0, 0)
  57         , _peak_channel (false)
  58 {
  59
  60         Gtk::HBox* b = Gtk::manage (new Gtk::HBox);
  61         b->set_spacing (6);
  62         b->pack_start (gain_entry);
  63         b->pack_start (*Gtk::manage (new Gtk::Label (_("dB"))), false, false);
  64
  65         gain_label.set_name ("AudioRegionEditorLabel");
  66         gain_label.set_text (_("Region gain:"));
  67         gain_label.set_alignment (1, 0.5);
  68         gain_entry.configure (gain_adjustment, 0.0, 1);
  69         _table.attach (gain_label, 0, 1, _table_row, _table_row + 1, Gtk::FILL, Gtk::FILL);
  70         _table.attach (*b, 1, 2, _table_row, _table_row + 1, Gtk::FILL, Gtk::FILL);
  71         ++_table_row;
  72
  73         b = Gtk::manage (new Gtk::HBox);
  74         b->set_spacing (6);
  75         b->pack_start (_peak_amplitude);
  76         b->pack_start (*Gtk::manage (new Gtk::Label (_("dBFS"))), false, false);
  77
  78         _peak_amplitude_label.set_name ("AudioRegionEditorLabel");
  79         _peak_amplitude_label.set_text (_("Peak amplitude:"));
  80         _peak_amplitude_label.set_alignment (1, 0.5);
  81         _table.attach (_peak_amplitude_label, 0, 1, _table_row, _table_row + 1, Gtk::FILL, Gtk::FILL);
  82         _table.attach (*b, 1, 2, _table_row, _table_row + 1, Gtk::FILL, Gtk::FILL);
  83         ++_table_row;
  84
  85         gain_changed ();
  86
  87         gain_adjustment.signal_value_changed().connect (sigc::mem_fun (*this, &AudioRegionEditor::gain_adjustment_changed));
  88
  89         _peak_amplitude.property_editable() = false;
  90         _peak_amplitude.set_text (_("Calculating..."));
  91
  92         PeakAmplitudeFound.connect (_peak_amplitude_connection, invalidator (*this), boost::bind (&AudioRegionEditor::peak_amplitude_found, this, _1), gui_context ());
  93         pthread_create_and_store (X_("peak-amplitude"), &_peak_amplitude_thread_handle, _peak_amplitude_thread, this);
  94         _peak_channel.deliver ('c');
  95 }
  96
  97 AudioRegionEditor::~AudioRegionEditor ()
  98 {
  99         pthread_cancel_one (_peak_amplitude_thread_handle);
 100         void* v;
 101         int const r = pthread_join (_peak_amplitude_thread_handle, &v);
 102         assert (r == 0);
 103 }
 104
 105 void
 106 AudioRegionEditor::region_changed (const PBD::PropertyChange& what_changed)
 107 {
 108         RegionEditor::region_changed (what_changed);
 109
 110         if (what_changed.contains (ARDOUR::Properties::scale_amplitude)) {
 111                 gain_changed ();
 112         }
 113
 114         if (what_changed.contains (ARDOUR::Properties::start) || what_changed.contains (ARDOUR::Properties::length)) {
 115                 /* ask the peak thread to run again */
 116                 _peak_channel.deliver ('c');
 117         }
 118 }
 119 void
 120 AudioRegionEditor::gain_changed ()
 121 {
 122         float const region_gain_dB = accurate_coefficient_to_dB (_audio_region->scale_amplitude());
 123         if (region_gain_dB != gain_adjustment.get_value()) {
 124                 gain_adjustment.set_value(region_gain_dB);
 125         }
 126 }
 127
 128 void
 129 AudioRegionEditor::gain_adjustment_changed ()
 130 {
 131         float const gain = dB_to_coefficient (gain_adjustment.get_value());
 132         if (_audio_region->scale_amplitude() != gain) {
 133                 _audio_region->set_scale_amplitude (gain);
 134         }
 135 }
 136
 137 void
 138 AudioRegionEditor::peak_amplitude_thread ()
 139 {
 140         while (1) {
 141                 /* await instructions to run */
 142                 char msg;
 143                 _peak_channel.receive (msg);
 144
 145                 /* compute peak amplitude and signal the fact */
 146                 PeakAmplitudeFound (accurate_coefficient_to_dB (_audio_region->maximum_amplitude ())); /* EMIT SIGNAL */
 147         }
 148 }
 149
 150 void
 151 AudioRegionEditor::peak_amplitude_found (double p)
 152 {
 153         stringstream s;
 154         s.precision (2);
 155         s.setf (ios::fixed, ios::floatfield);
 156         s << p;
 157         _peak_amplitude.set_text (s.str ());
 158 }
 159