gtk2_ardour/automation_controller.cc

   1 /*
   2     Copyright (C) 2007 Paul Davis
   3     Author: David Robillard
   4
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation; either version 2 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License
  16     along with this program; if not, write to the Free Software
  17     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18
  19 */
  20
  21 #include <iomanip>
  22 #include <cmath>
  23
  24 #include "pbd/compose.h"
  25 #include "pbd/error.h"
  26
  27 #include "ardour/automatable.h"
  28 #include "ardour/automation_control.h"
  29 #include "ardour/session.h"
  30 #include "ardour/tempo.h"
  31
  32 #include "ardour_ui.h"
  33 #include "automation_controller.h"
  34 #include "gui_thread.h"
  35 #include "note_select_dialog.h"
  36
  37 #include "i18n.h"
  38
  39 using namespace ARDOUR;
  40 using namespace Gtk;
  41
  42 AutomationController::AutomationController(boost::shared_ptr<Automatable>       printer,
  43                                            boost::shared_ptr<AutomationControl> ac,
  44                                            Adjustment*                          adj)
  45         : BarController (*adj, ac)
  46         , _ignore_change(false)
  47         , _printer (printer)
  48         , _controllable(ac)
  49         , _adjustment(adj)
  50 {
  51         assert (_printer);
  52
  53         set_name (X_("ProcessorControlSlider"));
  54
  55         StartGesture.connect (sigc::mem_fun(*this, &AutomationController::start_touch));
  56         StopGesture.connect (sigc::mem_fun(*this, &AutomationController::end_touch));
  57
  58         signal_button_release_event().connect(
  59                 sigc::mem_fun(*this, &AutomationController::on_button_release));
  60
  61         _adjustment->signal_value_changed().connect (
  62                         sigc::mem_fun(*this, &AutomationController::value_adjusted));
  63
  64         _screen_update_connection = ARDOUR_UI::RapidScreenUpdate.connect (
  65                         sigc::mem_fun (*this, &AutomationController::display_effective_value));
  66
  67         ac->Changed.connect (_changed_connection, invalidator (*this), boost::bind (&AutomationController::value_changed, this), gui_context());
  68 }
  69
  70 AutomationController::~AutomationController()
  71 {
  72 }
  73
  74 boost::shared_ptr<AutomationController>
  75 AutomationController::create(boost::shared_ptr<Automatable>       printer,
  76                              const Evoral::Parameter&             param,
  77                              const ParameterDescriptor&           desc,
  78                              boost::shared_ptr<AutomationControl> ac)
  79 {
  80         const double lo        = ac->internal_to_interface(desc.lower);
  81         const double up        = ac->internal_to_interface(desc.upper);
  82         const double normal    = ac->internal_to_interface(desc.normal);
  83         double       smallstep = desc.smallstep;
  84         double       largestep = desc.largestep;
  85         if (smallstep == 0.0) {
  86                 smallstep = (up - lo) / 100;
  87         }
  88         if (largestep == 0.0) {
  89                 largestep = (up - lo) / 10;
  90         }
  91         smallstep = ac->internal_to_interface(smallstep);
  92         largestep = ac->internal_to_interface(largestep);
  93
  94         Gtk::Adjustment* adjustment = manage (
  95                 new Gtk::Adjustment (normal, lo, up, smallstep, largestep));
  96
  97         assert (ac);
  98         assert(ac->parameter() == param);
  99         return boost::shared_ptr<AutomationController>(new AutomationController(printer, ac, adjustment));
 100 }
 101
 102 std::string
 103 AutomationController::get_label (double& xpos)
 104 {
 105         xpos = 0.5;
 106         return _printer->value_as_string (_controllable);
 107 }
 108
 109 void
 110 AutomationController::display_effective_value()
 111 {
 112         double const interface_value = _controllable->internal_to_interface(_controllable->get_value());
 113
 114         if (_adjustment->get_value () != interface_value) {
 115                 _ignore_change = true;
 116                 _adjustment->set_value (interface_value);
 117                 _ignore_change = false;
 118         }
 119 }
 120
 121 void
 122 AutomationController::value_adjusted ()
 123 {
 124         if (!_ignore_change) {
 125                 _controllable->set_value (_controllable->interface_to_internal(_adjustment->get_value()));
 126         }
 127 }
 128
 129 void
 130 AutomationController::start_touch()
 131 {
 132         _controllable->start_touch (_controllable->session().transport_frame());
 133 }
 134
 135 void
 136 AutomationController::end_touch ()
 137 {
 138         if (!_controllable->alist()) return;
 139         if (_controllable->automation_state() == Touch) {
 140
 141                 bool mark = false;
 142                 double when = 0;
 143
 144                 if (_controllable->session().transport_rolling()) {
 145                         mark = true;
 146                         when = _controllable->session().transport_frame();
 147                 }
 148
 149                 _controllable->stop_touch (mark, when);
 150         }
 151 }
 152
 153 static double
 154 midi_note_to_hz(int note)
 155 {
 156         const double tuning = 440.0;
 157         return tuning * pow(2, (note - 69.0) / 12.0);
 158 }
 159
 160 static double
 161 clamp(double val, double min, double max)
 162 {
 163         if (val < min) {
 164                 return min;
 165         } else if (val > max) {
 166                 return max;
 167         }
 168         return val;
 169 }
 170
 171 void
 172 AutomationController::run_note_select_dialog()
 173 {
 174         const ARDOUR::ParameterDescriptor& desc   = _controllable->desc();
 175         NoteSelectDialog*                  dialog = new NoteSelectDialog();
 176         if (dialog->run() == Gtk::RESPONSE_ACCEPT) {
 177                 const double value = ((_controllable->desc().unit == ARDOUR::ParameterDescriptor::HZ)
 178                                       ? midi_note_to_hz(dialog->note_number())
 179                                       : dialog->note_number());
 180                 _controllable->set_value(clamp(value, desc.lower, desc.upper));
 181         }
 182         delete dialog;
 183 }
 184
 185 void
 186 AutomationController::set_freq_beats(double beats)
 187 {
 188         const ARDOUR::ParameterDescriptor& desc    = _controllable->desc();
 189         const ARDOUR::Session&             session = _controllable->session();
 190         const framepos_t                   pos     = session.transport_frame();
 191         const ARDOUR::Tempo&               tempo   = session.tempo_map().tempo_at(pos);
 192         const double                       bpm     = tempo.beats_per_minute();
 193         const double                       bps     = bpm / 60.0;
 194         const double                       freq    = bps / beats;
 195         _controllable->set_value(clamp(freq, desc.lower, desc.upper));
 196 }
 197
 198 void
 199 AutomationController::set_ratio(double ratio)
 200 {
 201         const ARDOUR::ParameterDescriptor& desc  = _controllable->desc();
 202         const double                       value = _controllable->get_value() * ratio;
 203         _controllable->set_value(clamp(value, desc.lower, desc.upper));
 204 }
 205
 206 bool
 207 AutomationController::on_button_release(GdkEventButton* ev)
 208 {
 209         using namespace Gtk::Menu_Helpers;
 210
 211         if (ev->button != 3) {
 212                 return false;
 213         }
 214
 215         const ARDOUR::ParameterDescriptor& desc = _controllable->desc();
 216         if (desc.unit == ARDOUR::ParameterDescriptor::MIDI_NOTE) {
 217                 Gtk::Menu* menu  = manage(new Menu());
 218                 MenuList&  items = menu->items();
 219                 items.push_back(MenuElem(_("Select Note..."),
 220                                          sigc::mem_fun(*this, &AutomationController::run_note_select_dialog)));
 221                 menu->popup(1, ev->time);
 222                 return true;
 223         } else if (desc.unit == ARDOUR::ParameterDescriptor::HZ) {
 224                 Gtk::Menu* menu  = manage(new Menu());
 225                 MenuList&  items = menu->items();
 226                 items.push_back(MenuElem(_("Halve"),
 227                                          sigc::bind(sigc::mem_fun(*this, &AutomationController::set_ratio),
 228                                                     0.5)));
 229                 items.push_back(MenuElem(_("Double"),
 230                                          sigc::bind(sigc::mem_fun(*this, &AutomationController::set_ratio),
 231                                                     2.0)));
 232                 const bool is_audible = desc.upper > 40.0;
 233                 const bool is_low     = desc.lower < 1.0;
 234                 if (is_audible) {
 235                         items.push_back(MenuElem(_("Select Note..."),
 236                                                  sigc::mem_fun(*this, &AutomationController::run_note_select_dialog)));
 237                 }
 238                 if (is_low) {
 239                         for (double beats = 1.0; beats <= 16; ++beats) {
 240                                 items.push_back(MenuElem(string_compose(_("Set to %1 beat(s)"), (int)beats),
 241                                                          sigc::bind(sigc::mem_fun(*this, &AutomationController::set_freq_beats),
 242                                                                     beats)));
 243                         }
 244                 }
 245                 menu->popup(1, ev->time);
 246                 return true;
 247         }
 248
 249         return false;
 250 }
 251
 252 void
 253 AutomationController::value_changed ()
 254 {
 255         Gtkmm2ext::UI::instance()->call_slot (invalidator (*this), boost::bind (&AutomationController::display_effective_value, this));
 256 }
 257
 258 /** Stop updating our value from our controllable */
 259 void
 260 AutomationController::stop_updating ()
 261 {
 262         _screen_update_connection.disconnect ();
 263 }