71 lines
2.4 KiB
C++
71 lines
2.4 KiB
C++
/*
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* Copyright (C) 2010 Carl Hetherington <carl@carlh.net>
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* Copyright (C) 2013-2017 Paul Davis <paul@linuxaudiosystems.com>
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* Copyright (C) 2013-2022 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_unknown_processor_h__
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#define __ardour_unknown_processor_h__
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#include "ardour/libardour_visibility.h"
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#include "ardour/processor.h"
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namespace ARDOUR {
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class SideChain;
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/** A stub Processor that can be used in place of a `real' one that cannot be
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* created for some reason; usually because it requires a plugin which is not
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* present. UnknownProcessors are special-cased in a few places, notably
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* in route configuration and signal processing, so that on encountering them
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* configuration or processing stops.
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*
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* When a Processor is missing from a Route, the following processors cannot
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* be configured, as the missing Processor's output port configuration is
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* unknown.
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*
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* The main utility of the UnknownProcessor is that it allows state
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* to be preserved, so that, for example, loading and re-saving a
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* session on a machine without a particular plugin will not corrupt
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* the session.
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*/
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class LIBARDOUR_API UnknownProcessor : public Processor
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{
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public:
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UnknownProcessor (Session&, XMLNode const&, SessionObject*);
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virtual ~UnknownProcessor ();
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bool can_support_io_configuration (const ChanCount &, ChanCount &);
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void run (BufferSet& /*bufs*/, samplepos_t /*start_sample*/, samplepos_t /*end_sample*/, double /*speed*/, pframes_t /*nframes*/, bool /*result_required*/);
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protected:
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XMLNode& state () const;
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private:
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XMLNode _state;
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bool have_ioconfig;
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ChanCount* saved_input;
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ChanCount* saved_output;
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void add_sidechain_from_xml (const XMLNode& node, int version);
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std::shared_ptr<SideChain> _sidechain;
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};
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}
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#endif
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