libs/ardour/ardour/amp.h

   1 /*
   2     Copyright (C) 2006 Paul Davis
   3
   4     This program is free software; you can redistribute it and/or modify it
   5     under the terms of the GNU General Public License as published by the Free
   6     Software Foundation; either version 2 of the License, or (at your option)
   7     any later version.
   8
   9     This program is distributed in the hope that it will be useful, but WITHOUT
  10     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11     FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12     for more details.
  13
  14     You should have received a copy of the GNU General Public License along
  15     with this program; if not, write to the Free Software Foundation, Inc.,
  16     675 Mass Ave, Cambridge, MA 02139, USA.
  17 */
  18
  19 #ifndef __ardour_amp_h__
  20 #define __ardour_amp_h__
  21
  22 #include "ardour/types.h"
  23 #include "ardour/chan_count.h"
  24 #include "ardour/processor.h"
  25 #include "ardour/automation_control.h"
  26
  27 namespace ARDOUR {
  28
  29 class BufferSet;
  30 class IO;
  31 class MuteMaster;
  32
  33 /** Applies a declick operation to all audio inputs, passing the same number of
  34  * audio outputs, and passing through any other types unchanged.
  35  */
  36 class Amp : public Processor {
  37 public:
  38         Amp(Session& s, boost::shared_ptr<MuteMaster> m);
  39
  40         std::string display_name() const;
  41
  42         bool visible () const;
  43
  44         bool can_support_io_configuration (const ChanCount& in, ChanCount& out) const;
  45         bool configure_io (ChanCount in, ChanCount out);
  46
  47         void run (BufferSet& bufs, sframes_t start_frame, sframes_t end_frame, nframes_t nframes, bool);
  48
  49         bool apply_gain() const  { return _apply_gain; }
  50         void apply_gain(bool yn) { _apply_gain = yn; }
  51
  52         void setup_gain_automation (sframes_t start_frame, sframes_t end_frame, nframes_t nframes);
  53
  54         bool apply_gain_automation() const  { return _apply_gain_automation; }
  55         void apply_gain_automation(bool yn) { _apply_gain_automation = yn; }
  56
  57         XMLNode& state (bool full);
  58         int set_state (const XMLNode&, int version);
  59
  60         static void apply_gain (BufferSet& bufs, nframes_t nframes, gain_t initial, gain_t target);
  61         static void apply_simple_gain(BufferSet& bufs, nframes_t nframes, gain_t target);
  62
  63         static void apply_gain (AudioBuffer& buf, nframes_t nframes, gain_t initial, gain_t target);
  64         static void apply_simple_gain(AudioBuffer& buf, nframes_t nframes, gain_t target);
  65
  66         gain_t         gain () const { return _gain_control->user_float(); }
  67
  68         virtual void   set_gain (gain_t g, void *src);
  69         void           inc_gain (gain_t delta, void *src);
  70
  71         static void update_meters();
  72
  73         /* automation */
  74
  75         struct GainControl : public AutomationControl {
  76                 GainControl (std::string name, Session& session, Amp* a, const Evoral::Parameter &param,
  77                                 boost::shared_ptr<AutomationList> al = boost::shared_ptr<AutomationList>() )
  78                         : AutomationControl (session, param, al, name)
  79                         , _amp (a) {
  80                         set_flags (Controllable::Flag (flags() | Controllable::GainLike));
  81                 }
  82
  83                 void set_value (float val);
  84                 float get_value (void) const;
  85
  86                 Amp* _amp;
  87         };
  88
  89         boost::shared_ptr<GainControl> gain_control() {
  90                 return _gain_control;
  91         }
  92
  93         boost::shared_ptr<const GainControl> gain_control() const {
  94                 return _gain_control;
  95         }
  96
  97 private:
  98         bool   _denormal_protection;
  99         bool   _apply_gain;
 100         bool   _apply_gain_automation;
 101         float  _current_gain;
 102
 103         boost::shared_ptr<GainControl> _gain_control;
 104         boost::shared_ptr<MuteMaster>  _mute_master;
 105 };
 106
 107
 108 } // namespace ARDOUR
 109
 110 #endif // __ardour_amp_h__