libs/ardour/pan_controllable.cc

   1 /*
   2     Copyright (C) 2011 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 "ardour/pannable.h"
  21 #include "ardour/panner.h"
  22 #include "ardour/pan_controllable.h"
  23
  24 using namespace ARDOUR;
  25
  26 double
  27 PanControllable::lower () const
  28 {
  29         switch (parameter().type()) {
  30         case PanWidthAutomation:
  31                 return -1.0;
  32         default:
  33                 return 0.0;
  34         }
  35 }
  36
  37 void
  38 PanControllable::set_value (double v)
  39 {
  40         boost::shared_ptr<Panner> p = owner->panner();
  41
  42         if (!p) {
  43                 /* no panner: just do it */
  44                 AutomationControl::set_value (v);
  45                 return;
  46         }
  47
  48         bool can_set = false;
  49
  50         switch (parameter().type()) {
  51         case PanWidthAutomation:
  52                 can_set = p->clamp_width (v);
  53                 break;
  54         case PanAzimuthAutomation:
  55                 can_set = p->clamp_position (v);
  56                 break;
  57         case PanElevationAutomation:
  58                 can_set = p->clamp_elevation (v);
  59                 break;
  60         default:
  61                 break;
  62         }
  63
  64         if (can_set) {
  65                 AutomationControl::set_value (v);
  66         }
  67 }
  68