2
Copyright (C) 2010 Paul Davis
4
This program is free software; you can redistribute it and/or modify
5
it under the terms of the GNU General Public License as published by
6
the Free Software Foundation; either version 2 of the License, or
7
(at your option) any later version.
9
This program is distributed in the hope that it will be useful,
10
but WITHOUT ANY WARRANTY; without even the implied warranty of
11
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12
GNU General Public License for more details.
14
You should have received a copy of the GNU General Public License
15
along with this program; if not, write to the Free Software
16
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20
#ifndef __ardour_unknown_processor_h__
21
#define __ardour_unknown_processor_h__
23
#include "ardour/processor.h"
27
/** A stub Processor that can be used in place of a `real' one that cannot be
28
* created for some reason; usually because it requires a plugin which is not
29
* present. UnknownProcessors are special-cased in a few places, notably
30
* in route configuration and signal processing, so that on encountering them
31
* configuration or processing stops.
33
* When a Processor is missing from a Route, the following processors cannot
34
* be configured, as the missing Processor's output port configuration is
37
* The main utility of the UnknownProcessor is that it allows state
38
* to be preserved, so that, for example, loading and re-saving a
39
* session on a machine without a particular plugin will not corrupt
42
class UnknownProcessor : public Processor
45
UnknownProcessor (Session &, XMLNode const &);
47
/* These processors are hidden from view */
48
bool display_to_user () const {
52
bool can_support_io_configuration (const ChanCount &, ChanCount &) {
56
XMLNode & state (bool);