1 /* 2 * Copyright (C) 2006-2014 David Robillard <d@drobilla.net> 3 * Copyright (C) 2007-2017 Paul Davis <paul@linuxaudiosystems.com> 4 * Copyright (C) 2009-2012 Carl Hetherington <carl@carlh.net> 5 * Copyright (C) 2013-2018 Robin Gareus <robin@gareus.org> 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License along 18 * with this program; if not, write to the Free Software Foundation, Inc., 19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 20 */ 21 22 #ifndef __ardour_amp_h__ 23 #define __ardour_amp_h__ 24 25 #include "ardour/dB.h" 26 #include "ardour/libardour_visibility.h" 27 #include "ardour/types.h" 28 #include "ardour/chan_count.h" 29 #include "ardour/processor.h" 30 #include "ardour/automation_control.h" 31 32 namespace ARDOUR { 33 34 class BufferSet; 35 class GainControl; 36 class IO; 37 38 /** Gain Stage (Fader, Trim). */ 39 class LIBARDOUR_API Amp : public Processor { 40 public: 41 Amp(Session& s, const std::string& display_name, boost::shared_ptr<GainControl> control, bool control_midi_also); 42 display_name()43 std::string display_name () const { return _display_name; } set_display_name(const std::string & name)44 void set_display_name (const std::string& name) { _display_name = name; } 45 46 bool visible () const; 47 48 bool can_support_io_configuration (const ChanCount& in, ChanCount& out); 49 bool configure_io (ChanCount in, ChanCount out); 50 51 void run (BufferSet& bufs, samplepos_t start_sample, samplepos_t end_sample, double speed, pframes_t nframes, bool); 52 53 void set_gain_automation_buffer (gain_t *); 54 55 void setup_gain_automation (samplepos_t start_sample, samplepos_t end_sample, samplecnt_t nframes); 56 57 XMLNode& state (); 58 int set_state (const XMLNode&, int version); 59 60 static gain_t apply_gain (BufferSet& bufs, samplecnt_t sample_rate, samplecnt_t nframes, gain_t initial, gain_t target, bool midi_amp = true); 61 static void apply_simple_gain(BufferSet& bufs, samplecnt_t nframes, gain_t target, bool midi_amp = true); 62 63 static gain_t apply_gain (AudioBuffer& buf, samplecnt_t sample_rate, samplecnt_t nframes, gain_t initial, gain_t target, sampleoffset_t offset = 0); 64 static void apply_simple_gain (AudioBuffer& buf, samplecnt_t nframes, gain_t target, sampleoffset_t offset = 0); 65 gain_control()66 boost::shared_ptr<GainControl> gain_control() { 67 return _gain_control; 68 } 69 gain_control()70 boost::shared_ptr<const GainControl> gain_control() const { 71 return _gain_control; 72 } 73 74 private: 75 bool _apply_gain_automation; 76 float _current_gain; 77 samplepos_t _current_automation_sample; 78 79 std::string _display_name; 80 81 boost::shared_ptr<GainControl> _gain_control; 82 83 /** Buffer that we should use for gain automation */ 84 gain_t* _gain_automation_buffer; 85 bool _midi_amp; 86 }; 87 88 89 } // namespace ARDOUR 90 91 #endif // __ardour_amp_h__ 92