Add Monitor Return
This is a special case of an Internal Return processor dedicated to the monitor-section. The main use-case will be to collect signals from physical ports in a realtime-safe manner (no connections or Port creation)
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libs/ardour/ardour/monitor_return.h
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libs/ardour/ardour/monitor_return.h
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/*
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* Copyright (C) 2021 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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#ifndef __ardour_monitor_return_h__
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#define __ardour_monitor_return_h__
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#include "ardour/internal_return.h"
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namespace ARDOUR {
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class AudioPort;
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class LIBARDOUR_API MonitorReturn : public InternalReturn
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{
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public:
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MonitorReturn (Session&);
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~MonitorReturn ();
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void run (BufferSet& bufs, samplepos_t start_sample, samplepos_t end_sample, double speed, pframes_t nframes, bool);
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protected:
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XMLNode& state ();
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uint32_t _nch;
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gain_t _gain;
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};
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} // namespace ARDOUR
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#endif
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libs/ardour/monitor_return.cc
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libs/ardour/monitor_return.cc
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/*
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* Copyright (C) 2021 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 <algorithm>
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#include <glibmm/threads.h>
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#include "ardour/audio_port.h"
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#include "ardour/audioengine.h"
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#include "ardour/monitor_return.h"
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#include "ardour/session.h"
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using namespace ARDOUR;
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MonitorReturn::MonitorReturn (Session& s)
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: InternalReturn (s, "Monitor Return")
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, _nch (0)
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, _gain (1.f)
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{
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#if 0
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MonitorPort& mp (AudioEngine::instance()->monitor_port ());
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mp->enable ();
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#endif
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}
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MonitorReturn::~MonitorReturn ()
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{
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MonitorPort& mp (AudioEngine::instance()->monitor_port ());
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mp.clear_ports (true);
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}
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void
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MonitorReturn::run (BufferSet& bufs, samplepos_t start_sample, samplepos_t end_sample, double speed, pframes_t nframes, bool result_required)
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{
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InternalReturn::run (bufs, start_sample, end_sample, speed, nframes, result_required);
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MonitorPort& mp (AudioEngine::instance()->monitor_port ());
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if (mp.silent ()) {
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return;
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}
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uint32_t nch = bufs.count().n_audio ();
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if (_nch != nch) {
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_nch = _nch;
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_gain = nch > 0 ? (1.f / sqrtf (nch)) : 1.f;
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}
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const AudioBuffer& bb (mp.get_audio_buffer (nframes));
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for (BufferSet::iterator b = bufs.begin (DataType::AUDIO); b != bufs.end (DataType::AUDIO); ++b) {
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AudioBuffer* ab = dynamic_cast<AudioBuffer*> (&(*b));
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ab->accumulate_with_gain_from (bb, nframes, _gain);
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}
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}
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XMLNode&
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MonitorReturn::state ()
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{
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XMLNode& node (InternalReturn::state ());
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node.set_property ("type", "monreturn");
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return node;
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}
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@ -151,6 +151,7 @@ libardour_sources = [
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'monitor_control.cc',
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'monitor_control.cc',
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'monitor_port.cc',
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'monitor_port.cc',
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'monitor_processor.cc',
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'monitor_processor.cc',
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'monitor_return.cc',
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'mp3fileimportable.cc',
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'mp3fileimportable.cc',
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'mp3filesource.cc',
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'mp3filesource.cc',
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'mtc_slave.cc',
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'mtc_slave.cc',
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