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livetrax/libs/ardour/sidechain.cc

100 lines
2.4 KiB
C++

/*
* Copyright (C) 2016-2017 Paul Davis <paul@linuxaudiosystems.com>
* Copyright (C) 2016-2017 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 <algorithm>
#include "pbd/xml++.h"
#include "ardour/audioengine.h"
#include "ardour/buffer.h"
#include "ardour/buffer_set.h"
#include "ardour/io.h"
#include "ardour/session.h"
#include "ardour/sidechain.h"
#include "pbd/i18n.h"
using namespace ARDOUR;
using namespace PBD;
SideChain::SideChain (Session& s, const std::string& name)
: IOProcessor (s, true, false, name)
{
}
SideChain::~SideChain ()
{
disconnect ();
}
XMLNode&
SideChain::state () const
{
XMLNode& node = IOProcessor::state ();
node.set_property ("type", "sidechain");
return node;
}
int
SideChain::set_state (const XMLNode& node, int version)
{
IOProcessor::set_state (node, version);
return 0;
}
void
SideChain::run (BufferSet& bufs, samplepos_t start_sample, samplepos_t end_sample, double /*speed*/, pframes_t nframes, bool)
{
if (_input->n_ports () == ChanCount::ZERO || !_configured) {
return;
}
if (!check_active()) {
// zero buffers
for (DataType::iterator t = DataType::begin (); t != DataType::end (); ++t) {
for (uint32_t out = _configured_input.get (*t); out < bufs.count ().get (*t); ++out) {
bufs.get_available (*t, out).silence (nframes);
}
}
return;
}
_input->collect_input (bufs, nframes, _configured_input);
bufs.set_count (_configured_output);
}
bool
SideChain::can_support_io_configuration (const ChanCount& in, ChanCount& out)
{
out = in + _input->n_ports ();
return true;
}
bool
SideChain::configure_io (ChanCount in, ChanCount out)
{
if (out != in + _input->n_ports ()) {
/* disabled for now - see PluginInsert::configure_io() */
// return false;
}
return Processor::configure_io (in, out);
}