2 Copyright (C) 2000 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 <sigc++/signal.h>
31 #include "ardour/ardour.h"
32 #include "ardour/automatable_controls.h"
33 #include "ardour/buffer_set.h"
34 #include "ardour/latent.h"
35 #include "ardour/session_object.h"
36 #include "ardour/types.h"
45 /* A mixer strip element - plugin, send, meter, etc.
47 class Processor : public SessionObject, public AutomatableControls, public Latent
50 static const std::string state_node_name;
52 Processor(Session&, const std::string& name);
53 Processor(Session&, const XMLNode& node);
55 virtual ~Processor() { }
57 virtual bool visible() const { return true; }
59 bool active () const { return _active; }
61 /* we keep loose tabs on the "placement" of a Processor. Ultimately,
62 they are all executed as a single list, but there are some
63 semantics that require knowing whether a Processor is before
64 or after the fader, or panner etc. See Route::reorder_processors()
65 to see where this gets set.
68 Placement placement() const { return _placement; }
69 void set_placement (Placement p) { _placement = p; }
71 bool get_next_ab_is_active () const { return _next_ab_is_active; }
72 void set_next_ab_is_active (bool yn) { _next_ab_is_active = yn; }
74 virtual nframes_t signal_latency() const { return 0; }
76 virtual void transport_stopped (sframes_t frame) {}
78 virtual void set_block_size (nframes_t nframes) {}
80 virtual void run (BufferSet& bufs, sframes_t start_frame, sframes_t end_frame, nframes_t nframes) {}
81 virtual void silence (nframes_t nframes) {}
83 void activate () { _active = true; ActiveChanged(); }
84 void deactivate () { _active = false; ActiveChanged(); }
86 virtual bool configure_io (ChanCount in, ChanCount out);
88 /* Derived classes should override these, or processor appears as an in-place pass-through */
90 virtual bool can_support_io_configuration (const ChanCount& in, ChanCount& out) const = 0;
91 virtual ChanCount input_streams () const { return _configured_input; }
92 virtual ChanCount output_streams() const { return _configured_output; }
94 /* note: derived classes should implement state(), NOT get_state(), to allow
95 us to merge C++ inheritance and XML lack-of-inheritance reasonably
99 virtual XMLNode& state (bool full);
100 XMLNode& get_state (void);
101 int set_state (const XMLNode&);
103 void *get_gui () const { return _gui; }
104 void set_gui (void *p) { _gui = p; }
106 static sigc::signal<void,Processor*> ProcessorCreated;
108 sigc::signal<void> ActiveChanged;
109 sigc::signal<void,ChanCount,ChanCount> ConfigurationChanged;
114 bool _next_ab_is_active;
116 ChanCount _configured_input;
117 ChanCount _configured_output;
118 void* _gui; /* generic, we don't know or care what this is */
119 Placement _placement;
122 } // namespace ARDOUR
124 #endif /* __ardour_processor_h__ */