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livetrax/libs/ardour/polarity_processor.cc

82 lines
2.4 KiB
C++

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