2 Copyright (C) 2009-2010 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_processor_h__
21 #define __ardour_processor_h__
27 #include "pbd/statefuldestructible.h"
29 #include "ardour/ardour.h"
30 #include "ardour/buffer_set.h"
31 #include "ardour/latent.h"
32 #include "ardour/session_object.h"
33 #include "ardour/types.h"
34 #include "ardour/automatable.h"
43 /** A mixer strip element - plugin, send, meter, etc */
44 class Processor
: public SessionObject
, public Automatable
, public Latent
47 static const std::string state_node_name
;
49 Processor(Session
&, const std::string
& name
);
50 Processor (const Processor
& other
);
52 virtual ~Processor() { }
54 virtual std::string
display_name() const { return SessionObject::name(); }
56 virtual bool display_to_user() const { return _display_to_user
; }
57 virtual void set_display_to_user (bool);
59 bool active () const { return _pending_active
; }
61 bool get_next_ab_is_active () const { return _next_ab_is_active
; }
62 void set_next_ab_is_active (bool yn
) { _next_ab_is_active
= yn
; }
64 virtual framecnt_t
signal_latency() const { return 0; }
66 virtual int set_block_size (pframes_t
/*nframes*/) { return 0; }
67 virtual bool requires_fixed_sized_buffers() const { return false; }
69 /** @param result_required true if, on return from this method, @a bufs is required to contain valid data;
70 * if false, the method need not bother writing to @a bufs if it doesn't want to.
72 virtual void run (BufferSet
& /*bufs*/, framepos_t
/*start_frame*/, framepos_t
/*end_frame*/, pframes_t
/*nframes*/, bool /*result_required*/) {}
73 virtual void silence (framecnt_t
/*nframes*/) {}
75 virtual void activate () { _pending_active
= true; ActiveChanged(); }
76 virtual void deactivate () { _pending_active
= false; ActiveChanged(); }
77 virtual void flush() {}
79 virtual bool configure_io (ChanCount in
, ChanCount out
);
81 /* Derived classes should override these, or processor appears as an in-place pass-through */
83 virtual bool can_support_io_configuration (const ChanCount
& in
, ChanCount
& out
) const = 0;
84 virtual ChanCount
input_streams () const { return _configured_input
; }
85 virtual ChanCount
output_streams() const { return _configured_output
; }
87 virtual void realtime_handle_transport_stopped () {}
88 virtual void realtime_locate () {}
90 /* note: derived classes should implement state(), NOT get_state(), to allow
91 us to merge C++ inheritance and XML lack-of-inheritance reasonably
95 virtual XMLNode
& state (bool full
);
96 XMLNode
& get_state (void);
97 int set_state (const XMLNode
&, int version
);
99 void set_pre_fader (bool);
101 PBD::Signal0
<void> ActiveChanged
;
102 PBD::Signal2
<void,ChanCount
,ChanCount
> ConfigurationChanged
;
105 void* get_ui () const { return _ui_pointer
; }
108 virtual int set_state_2X (const XMLNode
&, int version
);
112 bool _next_ab_is_active
;
114 ChanCount _configured_input
;
115 ChanCount _configured_output
;
116 bool _display_to_user
;
117 bool _pre_fader
; ///< true if this processor is currently placed before the Amp, otherwise false
121 } // namespace ARDOUR
123 #endif /* __ardour_processor_h__ */