gtk2_ardour/latency_gui.cc

   1 /*
   2     Copyright (C) 2009 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 <inttypes.h>
  21
  22 #include <iomanip>
  23 #include "ardour/latent.h"
  24 #include "pbd/convert.h"
  25 #include <gtkmm2ext/utils.h>
  26
  27 #include "latency_gui.h"
  28
  29 #include "i18n.h"
  30
  31 using namespace PBD;
  32 using namespace Gtk;
  33 using namespace Gtkmm2ext;
  34 using namespace ARDOUR;
  35
  36
  37 static const gchar *_unit_strings[] = {
  38         N_("sample"),
  39         N_("msec"),
  40         N_("period"),
  41         0
  42 };
  43
  44 std::vector<std::string> LatencyGUI::unit_strings;
  45
  46 std::string
  47 LatencyBarController::get_label (double&)
  48 {
  49         double const nframes = _latency_gui->adjustment.get_value();
  50         std::stringstream s;
  51
  52         if (nframes < (_latency_gui->sample_rate / 1000.0)) {
  53                 s << ((framepos_t) rint (nframes)) << " samples";
  54         } else {
  55                 s << std::fixed << std::setprecision (2) << (nframes / (_latency_gui->sample_rate / 1000.0)) << " msecs";
  56         }
  57
  58         return s.str ();
  59 }
  60
  61 LatencyGUI::LatencyGUI (Latent& l, framepos_t sr, framepos_t psz)
  62         : _latent (l),
  63           initial_value (_latent.user_latency()),
  64           sample_rate (sr),
  65           period_size (psz),
  66           ignored (new PBD::IgnorableControllable()),
  67           /* max 1 second, step by frames, page by msecs */
  68           adjustment (initial_value, 0.0, sample_rate, 1.0, sample_rate / 1000.0f),
  69           bc (adjustment, this),
  70           reset_button (_("Reset"))
  71 {
  72         Widget* w;
  73
  74         if (unit_strings.empty()) {
  75                 unit_strings = I18N (_unit_strings);
  76         }
  77
  78         set_popdown_strings (units_combo, unit_strings);
  79         units_combo.set_active_text (unit_strings.front());
  80
  81         w = manage (new Image (Stock::ADD, ICON_SIZE_BUTTON));
  82         w->show ();
  83         plus_button.add (*w);
  84         w = manage (new Image (Stock::REMOVE, ICON_SIZE_BUTTON));
  85         w->show ();
  86         minus_button.add (*w);
  87
  88         hbox1.pack_start (bc, true, true);
  89
  90         hbox2.set_homogeneous (false);
  91         hbox2.set_spacing (12);
  92         hbox2.pack_start (reset_button);
  93         hbox2.pack_start (minus_button);
  94         hbox2.pack_start (plus_button);
  95         hbox2.pack_start (units_combo, true, true);
  96
  97         minus_button.signal_clicked().connect (sigc::bind (sigc::mem_fun (*this, &LatencyGUI::change_latency_from_button), -1));
  98         plus_button.signal_clicked().connect (sigc::bind (sigc::mem_fun (*this, &LatencyGUI::change_latency_from_button), 1));
  99         reset_button.signal_clicked().connect (sigc::mem_fun (*this, &LatencyGUI::reset));
 100
 101         adjustment.signal_value_changed().connect (sigc::mem_fun (*this, &LatencyGUI::finish));
 102
 103         bc.set_size_request (-1, 25);
 104         bc.set_style (BarController::LeftToRight);
 105         bc.set_use_parent (true);
 106         bc.set_name (X_("PluginSlider"));
 107
 108         set_spacing (12);
 109         pack_start (hbox1, true, true);
 110         pack_start (hbox2, true, true);
 111 }
 112
 113 void
 114 LatencyGUI::finish ()
 115 {
 116         framepos_t new_value = (framepos_t) adjustment.get_value();
 117         if (new_value != initial_value) {
 118                 _latent.set_user_latency (new_value);
 119         }
 120 }
 121
 122 void
 123 LatencyGUI::reset ()
 124 {
 125         _latent.set_user_latency (0);
 126         adjustment.set_value (initial_value);
 127 }
 128
 129 void
 130 LatencyGUI::refresh ()
 131 {
 132         initial_value = _latent.signal_latency();
 133         adjustment.set_value (initial_value);
 134 }
 135
 136 void
 137 LatencyGUI::change_latency_from_button (int dir)
 138 {
 139         std::string unitstr = units_combo.get_active_text();
 140         double shift = 0.0;
 141
 142         if (unitstr == unit_strings[0]) {
 143                 shift = 1;
 144         } else if (unitstr == unit_strings[1]) {
 145                 shift = (sample_rate / 1000.0);
 146         } else if (unitstr == unit_strings[2]) {
 147                 shift = period_size;
 148         } else {
 149                 fatal << string_compose (_("programming error: %1 (%2)"), X_("illegal string in latency GUI units combo"), unitstr)
 150                       << endmsg;
 151                 /*NOTREACHED*/
 152         }
 153
 154         if (dir > 0) {
 155                 adjustment.set_value (adjustment.get_value() + shift);
 156         } else {
 157                 adjustment.set_value (adjustment.get_value() - shift);
 158         }
 159 }
 160
 161 LatencyDialog::LatencyDialog (const std::string& title, Latent& l, framepos_t sr, framepos_t psz)
 162         : ArdourDialog (title, false, true),
 163           lwidget (l, sr, psz)
 164 {
 165         get_vbox()->pack_start (lwidget);
 166         add_button (Stock::CLOSE, RESPONSE_CLOSE);
 167
 168         show_all ();
 169         run ();
 170 }
 171
 172