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/chan_count.h"
30 #include "ardour/chan_mapping.h"
31 #include "ardour/cycles.h"
32 #include "ardour/latent.h"
33 #include "ardour/libardour_visibility.h"
34 #include "ardour/midi_state_tracker.h"
35 #include "ardour/plugin_insert.h"
36 #include "ardour/types.h"
37 #include "ardour/variant.h"
51 typedef boost::shared_ptr<Plugin> PluginPtr;
53 class LIBARDOUR_API PluginInfo {
56 virtual ~PluginInfo () { }
64 ARDOUR::PluginType type;
66 std::string unique_id;
68 virtual PluginPtr load (Session& session) = 0;
69 virtual bool is_instrument() const;
71 /* NOTE: this block of virtual methods looks like the interface
72 to a Processor, but Plugin does not inherit from Processor.
73 It is therefore not required that these precisely match
74 the interface, but it is likely that they will evolve together.
77 /* this returns true if the plugin can change its inputs or outputs on demand.
78 LADSPA, LV2 and VST plugins cannot do this. AudioUnits can.
81 virtual bool reconfigurable_io() const { return false; }
84 friend class PluginManager;
88 typedef boost::shared_ptr<PluginInfo> PluginInfoPtr;
89 typedef std::list<PluginInfoPtr> PluginInfoList;
91 class LIBARDOUR_API Plugin : public PBD::StatefulDestructible, public Latent
94 Plugin (ARDOUR::AudioEngine&, ARDOUR::Session&);
95 Plugin (const Plugin&);
98 struct ParameterDescriptor {
100 ParameterDescriptor ()
101 : integer_step(false)
103 , logarithmic (false)
104 , sr_dependent (false)
112 , enumeration (false)
116 /* essentially a union of LADSPA, VST and LV2 info */
123 float lower; ///< if this is a frequency, it will be in Hz (not a fraction of the sample rate)
124 float upper; ///< if this is a frequency, it will be in Hz (not a fraction of the sample rate)
131 bool midinote; ///< only used if integer_step is also true
132 uint32_t key; ///< for properties
133 Variant::Type datatype; ///< for properties
136 XMLNode& get_state ();
137 virtual int set_state (const XMLNode &, int version);
139 virtual void set_insert_info (const PluginInsert*) {}
141 virtual std::string unique_id() const = 0;
142 virtual const char * label() const = 0;
143 virtual const char * name() const = 0;
144 virtual const char * maker() const = 0;
145 virtual uint32_t parameter_count () const = 0;
146 virtual float default_value (uint32_t port) = 0;
147 virtual float get_parameter(uint32_t which) const = 0;
148 virtual std::string get_docs () const { return ""; }
149 virtual std::string get_parameter_docs (uint32_t /*which*/) const { return ""; }
151 virtual int get_parameter_descriptor (uint32_t which, ParameterDescriptor&) const = 0;
152 virtual uint32_t nth_parameter (uint32_t which, bool& ok) const = 0;
153 virtual void activate () = 0;
154 virtual void deactivate () = 0;
155 virtual void flush () { deactivate(); activate(); }
157 virtual int set_block_size (pframes_t nframes) = 0;
159 virtual int connect_and_run (BufferSet& bufs,
160 ChanMapping in, ChanMapping out,
161 pframes_t nframes, framecnt_t offset);
163 virtual std::set<Evoral::Parameter> automatable() const = 0;
164 virtual std::string describe_parameter (Evoral::Parameter) = 0;
165 virtual std::string state_node_name() const = 0;
166 virtual void print_parameter (uint32_t, char*, uint32_t len) const = 0;
168 virtual bool parameter_is_audio(uint32_t) const = 0;
169 virtual bool parameter_is_control(uint32_t) const = 0;
170 virtual bool parameter_is_input(uint32_t) const = 0;
171 virtual bool parameter_is_output(uint32_t) const = 0;
173 typedef std::map<const std::string, const float> ScalePoints;
175 virtual boost::shared_ptr<ScalePoints> get_scale_points(uint32_t /*port_index*/) const {
176 return boost::shared_ptr<ScalePoints>();
179 void realtime_handle_transport_stopped ();
180 void realtime_locate ();
181 void monitoring_changed ();
183 struct PresetRecord {
184 PresetRecord () : number (-1), user (true) {}
185 PresetRecord (const std::string& u, const std::string& l, int n = -1, bool s = true) : uri (u), label (l), number (n), user (s) {}
187 bool operator!= (PresetRecord const & a) const {
188 return number != a.number || uri != a.uri || label != a.label;
193 int number; // if <0, invalid
197 PresetRecord save_preset (std::string);
198 void remove_preset (std::string);
200 virtual bool load_preset (PresetRecord);
201 void clear_preset ();
203 const PresetRecord * preset_by_label (const std::string &);
204 const PresetRecord * preset_by_uri (const std::string &);
206 std::vector<PresetRecord> get_presets ();
208 /** @return true if this plugin will respond to MIDI program
209 * change messages by changing presets.
211 * This is hard to return a correct value for because most plugin APIs
212 * do not specify plugin behaviour. However, if you want to force
213 * the display of plugin built-in preset names rather than MIDI program
214 * numbers, return true. If you want a generic description, return
217 virtual bool presets_are_MIDI_programs() const { return false; }
219 /** @return true if this plugin is General MIDI compliant, false
222 * It is important to note that it is is almost impossible for a host
223 * (e.g. Ardour) to determine this for just about any plugin API
224 * known as of June 2012
226 virtual bool current_preset_uses_general_midi() const { return false; }
228 /** @return Last preset to be requested; the settings may have
229 * been changed since; find out with parameter_changed_since_last_preset.
231 PresetRecord last_preset () const {
235 bool parameter_changed_since_last_preset () const {
236 return _parameter_changed_since_last_preset;
239 virtual int first_user_preset_index () const {
243 /** Emitted when a preset is added or removed, respectively */
244 PBD::Signal0<void> PresetAdded;
245 PBD::Signal0<void> PresetRemoved;
247 /** Emitted when a preset has been loaded */
248 PBD::Signal0<void> PresetLoaded;
250 virtual bool has_editor () const = 0;
252 /** Emitted when any parameter changes */
253 PBD::Signal2<void, uint32_t, float> ParameterChanged;
255 virtual bool configure_io (ChanCount /*in*/, ChanCount /*out*/) { return true; }
257 /* specific types of plugins can overload this. As of September 2008, only
260 virtual bool can_support_io_configuration (const ChanCount& /*in*/, ChanCount& /*out*/) { return false; }
261 virtual ChanCount output_streams() const;
262 virtual ChanCount input_streams() const;
264 PluginInfoPtr get_info() const { return _info; }
265 virtual void set_info (const PluginInfoPtr inf);
267 ARDOUR::AudioEngine& engine() const { return _engine; }
268 ARDOUR::Session& session() const { return _session; }
270 void set_cycles (uint32_t c) { _cycles = c; }
271 cycles_t cycles() const { return _cycles; }
273 /** Get a descrption of all properties supported by this plugin.
275 * Properties are distinct from parameters in that they are potentially
276 * dynamic, referred to by key, and do not correspond 1:1 with ports.
278 * For LV2 plugins, properties are implemented by sending/receiving set/get
279 * messages to/from the plugin via event ports.
281 virtual void get_supported_properties(std::vector<ParameterDescriptor>& descs) {}
283 /** Set a property from the UI.
285 * This is not UI-specific, but may only be used by one thread. If the
286 * Ardour UI is present, that is the UI thread, but otherwise, any thread
287 * except the audio thread may call this function as long as it is not
288 * called concurrently.
290 virtual void set_property(uint32_t key, const Variant& value) {}
292 /** Emit PropertyChanged for all current property values. */
293 virtual void announce_property_values() {}
295 /** Emitted when a property is changed in the plugin. */
296 PBD::Signal2<void, uint32_t, Variant> PropertyChanged;
298 PBD::Signal1<void,uint32_t> StartTouch;
299 PBD::Signal1<void,uint32_t> EndTouch;
303 friend class PluginInsert;
304 friend struct PluginInsert::PluginControl;
306 virtual void set_parameter (uint32_t which, float val);
308 /** Do the actual saving of the current plugin settings to a preset of the provided name.
309 * Should return a URI on success, or an empty string on failure.
311 virtual std::string do_save_preset (std::string) = 0;
312 /** Do the actual removal of a preset of the provided name */
313 virtual void do_remove_preset (std::string) = 0;
315 ARDOUR::AudioEngine& _engine;
316 ARDOUR::Session& _session;
319 std::map<std::string, PresetRecord> _presets;
323 /** Fill _presets with our presets */
324 virtual void find_presets () = 0;
326 /** Add state to an existing XMLNode */
327 virtual void add_state (XMLNode *) const = 0;
330 MidiStateTracker _tracker;
331 BufferSet _pending_stop_events;
332 bool _have_pending_stop_events;
333 PresetRecord _last_preset;
334 bool _parameter_changed_since_last_preset;
336 void resolve_midi ();
339 PluginPtr find_plugin(ARDOUR::Session&, std::string unique_id, ARDOUR::PluginType);
341 } // namespace ARDOUR
343 #endif /* __ardour_plugin_h__ */