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 class AutomationControl;
54 typedef boost::shared_ptr<Plugin> PluginPtr;
55 typedef boost::shared_ptr<PluginInfo> PluginInfoPtr;
56 typedef std::list<PluginInfoPtr> PluginInfoList;
58 class LIBARDOUR_API Plugin : public PBD::StatefulDestructible, public Latent
61 Plugin (ARDOUR::AudioEngine&, ARDOUR::Session&);
62 Plugin (const Plugin&);
65 XMLNode& get_state ();
66 virtual int set_state (const XMLNode &, int version);
68 virtual void set_insert_id (PBD::ID id) {}
69 virtual void set_state_dir (const std::string& d = "") {}
71 virtual std::string unique_id() const = 0;
72 virtual const char * label() const = 0;
73 virtual const char * name() const = 0;
74 virtual const char * maker() const = 0;
75 virtual uint32_t parameter_count () const = 0;
76 virtual float default_value (uint32_t port) = 0;
77 virtual float get_parameter(uint32_t which) const = 0;
78 virtual std::string get_docs () const { return ""; }
79 virtual std::string get_parameter_docs (uint32_t /*which*/) const { return ""; }
81 virtual int get_parameter_descriptor (uint32_t which, ParameterDescriptor&) const = 0;
82 virtual uint32_t nth_parameter (uint32_t which, bool& ok) const = 0;
83 virtual void activate () = 0;
84 virtual void deactivate () = 0;
85 virtual void flush () { deactivate(); activate(); }
87 virtual int set_block_size (pframes_t nframes) = 0;
88 virtual bool requires_fixed_sized_buffers() const { return false; }
90 virtual int connect_and_run (BufferSet& bufs,
91 ChanMapping in, ChanMapping out,
92 pframes_t nframes, framecnt_t offset);
94 virtual std::set<Evoral::Parameter> automatable() const = 0;
95 virtual std::string describe_parameter (Evoral::Parameter) = 0;
96 virtual std::string state_node_name() const = 0;
97 virtual void print_parameter (uint32_t, char*, uint32_t len) const = 0;
99 virtual bool parameter_is_audio(uint32_t) const = 0;
100 virtual bool parameter_is_control(uint32_t) const = 0;
101 virtual bool parameter_is_input(uint32_t) const = 0;
102 virtual bool parameter_is_output(uint32_t) const = 0;
104 virtual void set_automation_control (uint32_t /*port_index*/, boost::shared_ptr<ARDOUR::AutomationControl>) { }
106 virtual boost::shared_ptr<ScalePoints> get_scale_points(uint32_t /*port_index*/) const {
107 return boost::shared_ptr<ScalePoints>();
110 void realtime_handle_transport_stopped ();
111 void realtime_locate ();
112 void monitoring_changed ();
114 struct PresetRecord {
115 PresetRecord () : valid (false) {}
116 PresetRecord (const std::string& u, const std::string& l, bool s = true) : uri (u), label (l), user (s), valid (true) {}
118 bool operator!= (PresetRecord const & a) const {
119 return uri != a.uri || label != a.label;
128 PresetRecord save_preset (std::string);
129 void remove_preset (std::string);
131 virtual bool load_preset (PresetRecord);
132 void clear_preset ();
134 const PresetRecord * preset_by_label (const std::string &);
135 const PresetRecord * preset_by_uri (const std::string &);
137 std::vector<PresetRecord> get_presets ();
139 /** @return true if this plugin will respond to MIDI program
140 * change messages by changing presets.
142 * This is hard to return a correct value for because most plugin APIs
143 * do not specify plugin behaviour. However, if you want to force
144 * the display of plugin built-in preset names rather than MIDI program
145 * numbers, return true. If you want a generic description, return
148 virtual bool presets_are_MIDI_programs() const { return false; }
150 /** @return true if this plugin is General MIDI compliant, false
153 * It is important to note that it is is almost impossible for a host
154 * (e.g. Ardour) to determine this for just about any plugin API
155 * known as of June 2012
157 virtual bool current_preset_uses_general_midi() const { return false; }
159 /** @return Last preset to be requested; the settings may have
160 * been changed since; find out with parameter_changed_since_last_preset.
162 PresetRecord last_preset () const {
166 bool parameter_changed_since_last_preset () const {
167 return _parameter_changed_since_last_preset;
170 virtual int first_user_preset_index () const {
174 /** Emitted when a preset is added or removed, respectively */
175 PBD::Signal0<void> PresetAdded;
176 PBD::Signal0<void> PresetRemoved;
178 /** Emitted when any preset has been changed */
179 static PBD::Signal2<void, std::string, Plugin*> PresetsChanged;
181 /** Emitted when a preset has been loaded */
182 PBD::Signal0<void> PresetLoaded;
184 /** Emitted when a parameter is altered in a way that may have
185 * changed the settings with respect to any loaded preset.
187 PBD::Signal0<void> PresetDirty;
189 virtual bool has_editor () const = 0;
191 /** Emitted when a parameter is altered by something outside of our
192 * control, most typically a Plugin GUI/editor
194 PBD::Signal2<void, uint32_t, float> ParameterChangedExternally;
196 virtual bool configure_io (ChanCount /*in*/, ChanCount /*out*/) { return true; }
198 /* specific types of plugins can overload this. As of September 2008, only
201 virtual bool can_support_io_configuration (const ChanCount& /*in*/, ChanCount& /*out*/) { return false; }
202 virtual ChanCount output_streams() const;
203 virtual ChanCount input_streams() const;
205 PluginInfoPtr get_info() const { return _info; }
206 virtual void set_info (const PluginInfoPtr inf);
208 ARDOUR::AudioEngine& engine() const { return _engine; }
209 ARDOUR::Session& session() const { return _session; }
211 void set_cycles (uint32_t c) { _cycles = c; }
212 cycles_t cycles() const { return _cycles; }
214 typedef std::map<uint32_t, ParameterDescriptor> PropertyDescriptors;
216 /** Get a descrption of all properties supported by this plugin.
218 * Properties are distinct from parameters in that they are potentially
219 * dynamic, referred to by key, and do not correspond 1:1 with ports.
221 * For LV2 plugins, properties are implemented by sending/receiving set/get
222 * messages to/from the plugin via event ports.
224 virtual const PropertyDescriptors& get_supported_properties() const {
225 static const PropertyDescriptors nothing;
229 virtual const ParameterDescriptor& get_property_descriptor(uint32_t id) const {
230 static const ParameterDescriptor nothing;
234 /** Set a property from the UI.
236 * This is not UI-specific, but may only be used by one thread. If the
237 * Ardour UI is present, that is the UI thread, but otherwise, any thread
238 * except the audio thread may call this function as long as it is not
239 * called concurrently.
241 virtual void set_property(uint32_t key, const Variant& value) {}
243 /** Emit PropertyChanged for all current property values. */
244 virtual void announce_property_values() {}
246 /** Emitted when a property is changed in the plugin. */
247 PBD::Signal2<void, uint32_t, Variant> PropertyChanged;
249 PBD::Signal1<void,uint32_t> StartTouch;
250 PBD::Signal1<void,uint32_t> EndTouch;
254 friend class PluginInsert;
255 friend class Session;
257 /* Called when a parameter of the plugin is changed outside of this
258 * host's control (typical via a plugin's own GUI/editor)
260 void parameter_changed_externally (uint32_t which, float val);
262 /* should be overridden by plugin API specific derived types to
263 * actually implement changing the parameter. The derived type should
264 * call this after the change is made.
266 virtual void set_parameter (uint32_t which, float val);
268 /** Do the actual saving of the current plugin settings to a preset of the provided name.
269 * Should return a URI on success, or an empty string on failure.
271 virtual std::string do_save_preset (std::string) = 0;
272 /** Do the actual removal of a preset of the provided name */
273 virtual void do_remove_preset (std::string) = 0;
275 ARDOUR::AudioEngine& _engine;
276 ARDOUR::Session& _session;
279 std::map<std::string, PresetRecord> _presets;
283 /** Fill _presets with our presets */
284 virtual void find_presets () = 0;
286 void update_presets (std::string src_unique_id, Plugin* src );
288 /** Add state to an existing XMLNode */
289 virtual void add_state (XMLNode *) const = 0;
292 MidiStateTracker _tracker;
293 BufferSet _pending_stop_events;
294 bool _have_pending_stop_events;
295 PresetRecord _last_preset;
296 bool _parameter_changed_since_last_preset;
298 PBD::ScopedConnection _preset_connection;
300 void resolve_midi ();
303 struct PluginPreset {
305 Plugin::PresetRecord _preset;
307 PluginPreset (PluginInfoPtr pip, const Plugin::PresetRecord *preset = NULL)
311 _preset.uri = preset->uri;
312 _preset.label = preset->label;
313 _preset.user = preset->user;
314 _preset.valid = preset->valid;
319 typedef boost::shared_ptr<PluginPreset> PluginPresetPtr;
320 typedef std::list<PluginPresetPtr> PluginPresetList;
322 PluginPtr find_plugin(ARDOUR::Session&, std::string unique_id, ARDOUR::PluginType);
324 class LIBARDOUR_API PluginInfo {
327 virtual ~PluginInfo () { }
330 std::string category;
335 ARDOUR::PluginType type;
337 std::string unique_id;
339 virtual PluginPtr load (Session& session) = 0;
340 virtual bool is_instrument() const;
341 virtual bool in_category (const std::string &) const { return false; }
343 virtual std::vector<Plugin::PresetRecord> get_presets (bool user_only) const = 0;
345 /* NOTE: this block of virtual methods looks like the interface
346 to a Processor, but Plugin does not inherit from Processor.
347 It is therefore not required that these precisely match
348 the interface, but it is likely that they will evolve together.
351 /* this returns true if the plugin can change its inputs or outputs on demand.
352 LADSPA, LV2 and VST plugins cannot do this. AudioUnits can.
355 virtual bool reconfigurable_io() const { return false; }
358 friend class PluginManager;
362 } // namespace ARDOUR
364 #endif /* __ardour_plugin_h__ */