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/libardour_visibility.h"
34 #include "ardour/types.h"
35 #include "ardour/automatable.h"
38 class ProcessorWindowProxy;
39 class PluginPinWindowProxy;
46 /** A mixer strip element - plugin, send, meter, etc */
47 class LIBARDOUR_API Processor : public SessionObject, public Automatable, public Latent
50 static const std::string state_node_name;
52 Processor(Session&, const std::string& name);
53 Processor (const Processor& other);
57 virtual std::string display_name() const { return SessionObject::name(); }
59 virtual bool display_to_user() const { return _display_to_user; }
60 virtual void set_display_to_user (bool);
62 bool active () const { return _pending_active; } ///< ardour hard bypass
63 virtual bool enabled () const { return _pending_active; } ///< processor enabled/bypass
64 virtual bool bypassable () const { return true; } ///< enable is not automated or locked
66 virtual bool does_routing() const { return false; }
68 bool get_next_ab_is_active () const { return _next_ab_is_active; }
69 void set_next_ab_is_active (bool yn) { _next_ab_is_active = yn; }
71 virtual samplecnt_t signal_latency() const { return 0; }
73 virtual void set_input_latency (samplecnt_t cnt) { _input_latency = cnt; }
74 samplecnt_t input_latency () const { return _input_latency; }
76 virtual void set_output_latency (samplecnt_t cnt) { _output_latency = cnt; }
77 samplecnt_t output_latency () const { return _output_latency; }
79 virtual int set_block_size (pframes_t /*nframes*/) { return 0; }
80 virtual bool requires_fixed_sized_buffers() const { return false; }
82 /** @param result_required true if, on return from this method, @a bufs is required to contain valid data;
83 * if false, the method need not bother writing to @a bufs if it doesn't want to.
85 virtual void run (BufferSet& /*bufs*/, samplepos_t /*start_sample*/, samplepos_t /*end_sample*/, double speed, pframes_t /*nframes*/, bool /*result_required*/) {}
86 virtual void silence (samplecnt_t nframes, samplepos_t start_sample) { automation_run (start_sample, nframes); }
88 virtual void activate () { _pending_active = true; ActiveChanged(); }
89 virtual void deactivate () { _pending_active = false; ActiveChanged(); }
90 virtual void flush() {}
92 virtual void enable (bool yn) { if (yn) { activate (); } else { deactivate (); } }
94 virtual bool configure_io (ChanCount in, ChanCount out);
96 /* Derived classes should override these, or processor appears as an in-place pass-through */
98 virtual bool can_support_io_configuration (const ChanCount& in, ChanCount& out) = 0;
99 virtual ChanCount input_streams () const { return _configured_input; }
100 virtual ChanCount output_streams() const { return _configured_output; }
102 virtual void realtime_handle_transport_stopped () {}
103 virtual void realtime_locate () {}
105 /* most processors won't care about this, but plugins that
106 receive MIDI or similar data from an input source that
107 may suddenly go "quiet" because of monitoring changes
108 need to know about it.
110 virtual void monitoring_changed() {}
112 /* note: derived classes should implement state(), NOT get_state(), to allow
113 us to merge C++ inheritance and XML lack-of-inheritance reasonably
117 virtual XMLNode& state (bool full);
118 XMLNode& get_state (void);
119 int set_state (const XMLNode&, int version);
121 virtual void set_pre_fader (bool);
123 PBD::Signal0<void> ActiveChanged;
124 PBD::Signal0<void> BypassableChanged;
125 PBD::Signal2<void,ChanCount,ChanCount> ConfigurationChanged;
127 /* cross-thread signals.
128 * This allows control-surfaces to show/hide a plugin GUI.
130 PBD::Signal0<void> ToggleUI;
131 PBD::Signal0<void> ShowUI;
132 PBD::Signal0<void> HideUI;
134 ProcessorWindowProxy * window_proxy () const { return _window_proxy; }
135 void set_window_proxy (ProcessorWindowProxy* wp) { _window_proxy = wp; }
137 PluginPinWindowProxy * pinmgr_proxy () const { return _pinmgr_proxy; }
138 void set_pingmgr_proxy (PluginPinWindowProxy* wp) { _pinmgr_proxy = wp ; }
140 virtual void set_owner (SessionObject*);
141 SessionObject* owner() const;
144 virtual int set_state_2X (const XMLNode&, int version);
148 bool _next_ab_is_active;
150 ChanCount _configured_input;
151 ChanCount _configured_output;
152 bool _display_to_user;
153 bool _pre_fader; ///< true if this processor is currently placed before the Amp, otherwise false
155 ProcessorWindowProxy *_window_proxy;
156 PluginPinWindowProxy *_pinmgr_proxy;
157 SessionObject* _owner;
158 samplecnt_t _input_latency;
159 samplecnt_t _output_latency;
162 } // namespace ARDOUR
164 #endif /* __ardour_processor_h__ */