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>
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.
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.
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.
22 #ifndef __ardour_amp_h__
23 #define __ardour_amp_h__
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"
38 /** Gain Stage (Fader, Trim). */
39 class LIBARDOUR_API Amp : public Processor {
41 Amp(Session& s, const std::string& display_name, boost::shared_ptr<GainControl> control, bool control_midi_also);
43 std::string display_name () const { return _display_name; }
44 void set_display_name (const std::string& name) { _display_name = name; }
46 bool visible () const;
48 bool can_support_io_configuration (const ChanCount& in, ChanCount& out);
49 bool configure_io (ChanCount in, ChanCount out);
51 void run (BufferSet& bufs, samplepos_t start_sample, samplepos_t end_sample, double speed, pframes_t nframes, bool);
53 void set_gain_automation_buffer (gain_t *);
55 void setup_gain_automation (samplepos_t start_sample, samplepos_t end_sample, samplecnt_t nframes);
58 int set_state (const XMLNode&, int version);
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);
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);
66 boost::shared_ptr<GainControl> gain_control() {
70 boost::shared_ptr<const GainControl> gain_control() const {
75 bool _denormal_protection;
76 bool _apply_gain_automation;
78 samplepos_t _current_automation_sample;
80 std::string _display_name;
82 boost::shared_ptr<GainControl> _gain_control;
84 /** Buffer that we should use for gain automation */
85 gain_t* _gain_automation_buffer;
92 #endif // __ardour_amp_h__