82 lines
2.4 KiB
C++
82 lines
2.4 KiB
C++
/*
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* Copyright (C) 2017-2019 Robin Gareus <robin@gareus.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "ardour/amp.h"
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#include "ardour/audio_buffer.h"
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#include "ardour/phase_control.h"
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#include "ardour/polarity_processor.h"
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#include "ardour/session.h"
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#include "pbd/i18n.h"
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using namespace ARDOUR;
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using namespace PBD;
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PolarityProcessor::PolarityProcessor (Session& s, boost::shared_ptr<PhaseControl> control)
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: Processor(s, "Polarity")
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, _control (control)
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{
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}
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bool
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PolarityProcessor::can_support_io_configuration (const ChanCount& in, ChanCount& out)
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{
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out = in;
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return true;
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}
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bool
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PolarityProcessor::configure_io (ChanCount in, ChanCount out)
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{
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if (out != in) { // always 1:1
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return false;
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}
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_control->resize (in.n_audio ());
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_current_gain.resize (in.n_audio (), 1.f);
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return Processor::configure_io (in, out);
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}
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void
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PolarityProcessor::run (BufferSet& bufs, samplepos_t /*start_sample*/, samplepos_t /*end_sample*/, double /*speed*/, pframes_t nframes, bool)
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{
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size_t chn = 0;
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assert (bufs.count().n_audio () <= _current_gain.size());
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if (!_active && !_pending_active) {
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/* fade all to unity */
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for (BufferSet::audio_iterator i = bufs.audio_begin(); i != bufs.audio_end(); ++i, ++chn) {
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_current_gain[chn] = Amp::apply_gain (*i, _session.nominal_sample_rate(), nframes, _current_gain[chn], 1.0);
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}
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return;
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}
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_active = _pending_active;
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for (BufferSet::audio_iterator i = bufs.audio_begin(); i != bufs.audio_end(); ++i, ++chn) {
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_current_gain[chn] = Amp::apply_gain (*i, _session.nominal_sample_rate(), nframes, _current_gain[chn], _control->inverted (chn) ? -1.f : 1.f);
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}
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}
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XMLNode&
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PolarityProcessor::state ()
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{
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XMLNode& node (Processor::state ());
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node.set_property("type", "polarity");
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return node;
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}
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