2 Copyright (C) 2000-2006 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_plugin_h__
21 #define __ardour_plugin_h__
23 #include <boost/shared_ptr.hpp>
26 #include "pbd/statefuldestructible.h"
27 #include "pbd/controllable.h"
29 #include "ardour/buffer_set.h"
30 #include "ardour/chan_count.h"
31 #include "ardour/chan_mapping.h"
32 #include "ardour/cycles.h"
33 #include "ardour/latent.h"
34 #include "ardour/libardour_visibility.h"
35 #include "ardour/midi_state_tracker.h"
36 #include "ardour/parameter_descriptor.h"
37 #include "ardour/types.h"
38 #include "ardour/variant.h"
52 typedef boost::shared_ptr<Plugin> PluginPtr;
54 class LIBARDOUR_API PluginInfo {
57 virtual ~PluginInfo () { }
65 ARDOUR::PluginType type;
67 std::string unique_id;
69 virtual PluginPtr load (Session& session) = 0;
70 virtual bool is_instrument() const;
71 virtual bool in_category (const std::string &) const { return false; }
73 /* NOTE: this block of virtual methods looks like the interface
74 to a Processor, but Plugin does not inherit from Processor.
75 It is therefore not required that these precisely match
76 the interface, but it is likely that they will evolve together.
79 /* this returns true if the plugin can change its inputs or outputs on demand.
80 LADSPA, LV2 and VST plugins cannot do this. AudioUnits can.
83 virtual bool reconfigurable_io() const { return false; }
86 friend class PluginManager;
90 typedef boost::shared_ptr<PluginInfo> PluginInfoPtr;
91 typedef std::list<PluginInfoPtr> PluginInfoList;
93 class LIBARDOUR_API Plugin : public PBD::StatefulDestructible, public Latent
96 Plugin (ARDOUR::AudioEngine&, ARDOUR::Session&);
97 Plugin (const Plugin&);
100 XMLNode& get_state ();
101 virtual int set_state (const XMLNode &, int version);
103 virtual void set_insert_id (PBD::ID id) {}
105 virtual std::string unique_id() const = 0;
106 virtual const char * label() const = 0;
107 virtual const char * name() const = 0;
108 virtual const char * maker() const = 0;
109 virtual uint32_t parameter_count () const = 0;
110 virtual float default_value (uint32_t port) = 0;
111 virtual float get_parameter(uint32_t which) const = 0;
112 virtual std::string get_docs () const { return ""; }
113 virtual std::string get_parameter_docs (uint32_t /*which*/) const { return ""; }
115 virtual int get_parameter_descriptor (uint32_t which, ParameterDescriptor&) const = 0;
116 virtual uint32_t nth_parameter (uint32_t which, bool& ok) const = 0;
117 virtual void activate () = 0;
118 virtual void deactivate () = 0;
119 virtual void flush () { deactivate(); activate(); }
121 virtual int set_block_size (pframes_t nframes) = 0;
123 virtual int connect_and_run (BufferSet& bufs,
124 ChanMapping in, ChanMapping out,
125 pframes_t nframes, framecnt_t offset);
127 virtual std::set<Evoral::Parameter> automatable() const = 0;
128 virtual std::string describe_parameter (Evoral::Parameter) = 0;
129 virtual std::string state_node_name() const = 0;
130 virtual void print_parameter (uint32_t, char*, uint32_t len) const = 0;
132 virtual bool parameter_is_audio(uint32_t) const = 0;
133 virtual bool parameter_is_control(uint32_t) const = 0;
134 virtual bool parameter_is_input(uint32_t) const = 0;
135 virtual bool parameter_is_output(uint32_t) const = 0;
137 virtual boost::shared_ptr<ScalePoints> get_scale_points(uint32_t /*port_index*/) const {
138 return boost::shared_ptr<ScalePoints>();
141 void realtime_handle_transport_stopped ();
142 void realtime_locate ();
143 void monitoring_changed ();
145 struct PresetRecord {
146 PresetRecord () : number (-1), user (true) {}
147 PresetRecord (const std::string& u, const std::string& l, int n = -1, bool s = true) : uri (u), label (l), number (n), user (s) {}
149 bool operator!= (PresetRecord const & a) const {
150 return number != a.number || uri != a.uri || label != a.label;
155 int number; // if <0, invalid
159 PresetRecord save_preset (std::string);
160 void remove_preset (std::string);
162 virtual bool load_preset (PresetRecord);
163 void clear_preset ();
165 const PresetRecord * preset_by_label (const std::string &);
166 const PresetRecord * preset_by_uri (const std::string &);
168 std::vector<PresetRecord> get_presets ();
170 /** @return true if this plugin will respond to MIDI program
171 * change messages by changing presets.
173 * This is hard to return a correct value for because most plugin APIs
174 * do not specify plugin behaviour. However, if you want to force
175 * the display of plugin built-in preset names rather than MIDI program
176 * numbers, return true. If you want a generic description, return
179 virtual bool presets_are_MIDI_programs() const { return false; }
181 /** @return true if this plugin is General MIDI compliant, false
184 * It is important to note that it is is almost impossible for a host
185 * (e.g. Ardour) to determine this for just about any plugin API
186 * known as of June 2012
188 virtual bool current_preset_uses_general_midi() const { return false; }
190 /** @return Last preset to be requested; the settings may have
191 * been changed since; find out with parameter_changed_since_last_preset.
193 PresetRecord last_preset () const {
197 bool parameter_changed_since_last_preset () const {
198 return _parameter_changed_since_last_preset;
201 virtual int first_user_preset_index () const {
205 /** Emitted when a preset is added or removed, respectively */
206 PBD::Signal0<void> PresetAdded;
207 PBD::Signal0<void> PresetRemoved;
209 /** Emitted when a preset has been loaded */
210 PBD::Signal0<void> PresetLoaded;
212 /** Emitted when a parameter is altered in a way that may have
213 * changed the settings with respect to any loaded preset.
215 PBD::Signal0<void> PresetDirty;
217 virtual bool has_editor () const = 0;
219 /** Emitted when a parameter is altered by something outside of our
220 * control, most typically a Plugin GUI/editor
222 PBD::Signal2<void, uint32_t, float> ParameterChangedExternally;
224 virtual bool configure_io (ChanCount /*in*/, ChanCount /*out*/) { return true; }
226 /* specific types of plugins can overload this. As of September 2008, only
229 virtual bool can_support_io_configuration (const ChanCount& /*in*/, ChanCount& /*out*/) { return false; }
230 virtual ChanCount output_streams() const;
231 virtual ChanCount input_streams() const;
233 PluginInfoPtr get_info() const { return _info; }
234 virtual void set_info (const PluginInfoPtr inf);
236 ARDOUR::AudioEngine& engine() const { return _engine; }
237 ARDOUR::Session& session() const { return _session; }
239 void set_cycles (uint32_t c) { _cycles = c; }
240 cycles_t cycles() const { return _cycles; }
242 typedef std::map<uint32_t, ParameterDescriptor> PropertyDescriptors;
244 /** Get a descrption of all properties supported by this plugin.
246 * Properties are distinct from parameters in that they are potentially
247 * dynamic, referred to by key, and do not correspond 1:1 with ports.
249 * For LV2 plugins, properties are implemented by sending/receiving set/get
250 * messages to/from the plugin via event ports.
252 virtual const PropertyDescriptors& get_supported_properties() const {
253 static const PropertyDescriptors nothing;
257 virtual const ParameterDescriptor& get_property_descriptor(uint32_t id) const {
258 static const ParameterDescriptor nothing;
262 /** Set a property from the UI.
264 * This is not UI-specific, but may only be used by one thread. If the
265 * Ardour UI is present, that is the UI thread, but otherwise, any thread
266 * except the audio thread may call this function as long as it is not
267 * called concurrently.
269 virtual void set_property(uint32_t key, const Variant& value) {}
271 /** Emit PropertyChanged for all current property values. */
272 virtual void announce_property_values() {}
274 /** Emitted when a property is changed in the plugin. */
275 PBD::Signal2<void, uint32_t, Variant> PropertyChanged;
277 PBD::Signal1<void,uint32_t> StartTouch;
278 PBD::Signal1<void,uint32_t> EndTouch;
282 friend class PluginInsert;
283 friend class Session;
285 /* Called when a parameter of the plugin is changed outside of this
286 * host's control (typical via a plugin's own GUI/editor)
288 void parameter_changed_externally (uint32_t which, float val);
290 /* should be overridden by plugin API specific derived types to
291 * actually implement changing the parameter. The derived type should
292 * call this after the change is made.
294 virtual void set_parameter (uint32_t which, float val);
296 /** Do the actual saving of the current plugin settings to a preset of the provided name.
297 * Should return a URI on success, or an empty string on failure.
299 virtual std::string do_save_preset (std::string) = 0;
300 /** Do the actual removal of a preset of the provided name */
301 virtual void do_remove_preset (std::string) = 0;
303 ARDOUR::AudioEngine& _engine;
304 ARDOUR::Session& _session;
307 std::map<std::string, PresetRecord> _presets;
311 /** Fill _presets with our presets */
312 virtual void find_presets () = 0;
314 /** Add state to an existing XMLNode */
315 virtual void add_state (XMLNode *) const = 0;
318 MidiStateTracker _tracker;
319 BufferSet _pending_stop_events;
320 bool _have_pending_stop_events;
321 PresetRecord _last_preset;
322 bool _parameter_changed_since_last_preset;
324 void resolve_midi ();
327 PluginPtr find_plugin(ARDOUR::Session&, std::string unique_id, ARDOUR::PluginType);
329 } // namespace ARDOUR
331 #endif /* __ardour_plugin_h__ */