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"
53 typedef boost::shared_ptr<Plugin> PluginPtr;
54 typedef boost::shared_ptr<PluginInfo> PluginInfoPtr;
55 typedef std::list<PluginInfoPtr> PluginInfoList;
57 class LIBARDOUR_API Plugin : public PBD::StatefulDestructible, public Latent
60 Plugin (ARDOUR::AudioEngine&, ARDOUR::Session&);
61 Plugin (const Plugin&);
64 XMLNode& get_state ();
65 virtual int set_state (const XMLNode &, int version);
67 virtual void set_insert_id (PBD::ID id) {}
68 virtual void set_state_dir (const std::string& d = "") {}
70 virtual std::string unique_id() const = 0;
71 virtual const char * label() const = 0;
72 virtual const char * name() const = 0;
73 virtual const char * maker() const = 0;
74 virtual uint32_t parameter_count () const = 0;
75 virtual float default_value (uint32_t port) = 0;
76 virtual float get_parameter(uint32_t which) const = 0;
77 virtual std::string get_docs () const { return ""; }
78 virtual std::string get_parameter_docs (uint32_t /*which*/) const { return ""; }
80 virtual int get_parameter_descriptor (uint32_t which, ParameterDescriptor&) const = 0;
81 virtual uint32_t nth_parameter (uint32_t which, bool& ok) const = 0;
82 virtual void activate () = 0;
83 virtual void deactivate () = 0;
84 virtual void flush () { deactivate(); activate(); }
86 virtual int set_block_size (pframes_t nframes) = 0;
87 virtual bool requires_fixed_sized_buffers() const { return false; }
89 virtual int connect_and_run (BufferSet& bufs,
90 ChanMapping in, ChanMapping out,
91 pframes_t nframes, framecnt_t offset);
93 virtual std::set<Evoral::Parameter> automatable() const = 0;
94 virtual std::string describe_parameter (Evoral::Parameter) = 0;
95 virtual std::string state_node_name() const = 0;
96 virtual void print_parameter (uint32_t, char*, uint32_t len) const = 0;
98 virtual bool parameter_is_audio(uint32_t) const = 0;
99 virtual bool parameter_is_control(uint32_t) const = 0;
100 virtual bool parameter_is_input(uint32_t) const = 0;
101 virtual bool parameter_is_output(uint32_t) const = 0;
103 virtual boost::shared_ptr<ScalePoints> get_scale_points(uint32_t /*port_index*/) const {
104 return boost::shared_ptr<ScalePoints>();
107 void realtime_handle_transport_stopped ();
108 void realtime_locate ();
109 void monitoring_changed ();
111 struct PresetRecord {
112 PresetRecord () : valid (false) {}
113 PresetRecord (const std::string& u, const std::string& l, bool s = true) : uri (u), label (l), user (s), valid (true) {}
115 bool operator!= (PresetRecord const & a) const {
116 return uri != a.uri || label != a.label;
125 PresetRecord save_preset (std::string);
126 void remove_preset (std::string);
128 virtual bool load_preset (PresetRecord);
129 void clear_preset ();
131 const PresetRecord * preset_by_label (const std::string &);
132 const PresetRecord * preset_by_uri (const std::string &);
134 std::vector<PresetRecord> get_presets ();
136 /** @return true if this plugin will respond to MIDI program
137 * change messages by changing presets.
139 * This is hard to return a correct value for because most plugin APIs
140 * do not specify plugin behaviour. However, if you want to force
141 * the display of plugin built-in preset names rather than MIDI program
142 * numbers, return true. If you want a generic description, return
145 virtual bool presets_are_MIDI_programs() const { return false; }
147 /** @return true if this plugin is General MIDI compliant, false
150 * It is important to note that it is is almost impossible for a host
151 * (e.g. Ardour) to determine this for just about any plugin API
152 * known as of June 2012
154 virtual bool current_preset_uses_general_midi() const { return false; }
156 /** @return Last preset to be requested; the settings may have
157 * been changed since; find out with parameter_changed_since_last_preset.
159 PresetRecord last_preset () const {
163 bool parameter_changed_since_last_preset () const {
164 return _parameter_changed_since_last_preset;
167 virtual int first_user_preset_index () const {
171 /** Emitted when a preset is added or removed, respectively */
172 PBD::Signal0<void> PresetAdded;
173 PBD::Signal0<void> PresetRemoved;
175 /** Emitted when any preset has been changed */
176 static PBD::Signal2<void, std::string, Plugin*> PresetsChanged;
178 /** Emitted when a preset has been loaded */
179 PBD::Signal0<void> PresetLoaded;
181 /** Emitted when a parameter is altered in a way that may have
182 * changed the settings with respect to any loaded preset.
184 PBD::Signal0<void> PresetDirty;
186 virtual bool has_editor () const = 0;
188 /** Emitted when a parameter is altered by something outside of our
189 * control, most typically a Plugin GUI/editor
191 PBD::Signal2<void, uint32_t, float> ParameterChangedExternally;
193 virtual bool configure_io (ChanCount /*in*/, ChanCount /*out*/) { return true; }
195 /* specific types of plugins can overload this. As of September 2008, only
198 virtual bool can_support_io_configuration (const ChanCount& /*in*/, ChanCount& /*out*/) { return false; }
199 virtual ChanCount output_streams() const;
200 virtual ChanCount input_streams() const;
202 PluginInfoPtr get_info() const { return _info; }
203 virtual void set_info (const PluginInfoPtr inf);
205 ARDOUR::AudioEngine& engine() const { return _engine; }
206 ARDOUR::Session& session() const { return _session; }
208 void set_cycles (uint32_t c) { _cycles = c; }
209 cycles_t cycles() const { return _cycles; }
211 typedef std::map<uint32_t, ParameterDescriptor> PropertyDescriptors;
213 /** Get a descrption of all properties supported by this plugin.
215 * Properties are distinct from parameters in that they are potentially
216 * dynamic, referred to by key, and do not correspond 1:1 with ports.
218 * For LV2 plugins, properties are implemented by sending/receiving set/get
219 * messages to/from the plugin via event ports.
221 virtual const PropertyDescriptors& get_supported_properties() const {
222 static const PropertyDescriptors nothing;
226 virtual const ParameterDescriptor& get_property_descriptor(uint32_t id) const {
227 static const ParameterDescriptor nothing;
231 /** Set a property from the UI.
233 * This is not UI-specific, but may only be used by one thread. If the
234 * Ardour UI is present, that is the UI thread, but otherwise, any thread
235 * except the audio thread may call this function as long as it is not
236 * called concurrently.
238 virtual void set_property(uint32_t key, const Variant& value) {}
240 /** Emit PropertyChanged for all current property values. */
241 virtual void announce_property_values() {}
243 /** Emitted when a property is changed in the plugin. */
244 PBD::Signal2<void, uint32_t, Variant> PropertyChanged;
246 PBD::Signal1<void,uint32_t> StartTouch;
247 PBD::Signal1<void,uint32_t> EndTouch;
251 friend class PluginInsert;
252 friend class Session;
254 /* Called when a parameter of the plugin is changed outside of this
255 * host's control (typical via a plugin's own GUI/editor)
257 void parameter_changed_externally (uint32_t which, float val);
259 /* should be overridden by plugin API specific derived types to
260 * actually implement changing the parameter. The derived type should
261 * call this after the change is made.
263 virtual void set_parameter (uint32_t which, float val);
265 /** Do the actual saving of the current plugin settings to a preset of the provided name.
266 * Should return a URI on success, or an empty string on failure.
268 virtual std::string do_save_preset (std::string) = 0;
269 /** Do the actual removal of a preset of the provided name */
270 virtual void do_remove_preset (std::string) = 0;
272 ARDOUR::AudioEngine& _engine;
273 ARDOUR::Session& _session;
276 std::map<std::string, PresetRecord> _presets;
280 /** Fill _presets with our presets */
281 virtual void find_presets () = 0;
283 void update_presets (std::string src_unique_id, Plugin* src );
285 /** Add state to an existing XMLNode */
286 virtual void add_state (XMLNode *) const = 0;
289 MidiStateTracker _tracker;
290 BufferSet _pending_stop_events;
291 bool _have_pending_stop_events;
292 PresetRecord _last_preset;
293 bool _parameter_changed_since_last_preset;
295 PBD::ScopedConnection _preset_connection;
297 void resolve_midi ();
300 struct PluginPreset {
302 Plugin::PresetRecord _preset;
304 PluginPreset (PluginInfoPtr pip, const Plugin::PresetRecord *preset = NULL)
308 _preset.uri = preset->uri;
309 _preset.label = preset->label;
310 _preset.user = preset->user;
311 _preset.valid = preset->valid;
316 typedef boost::shared_ptr<PluginPreset> PluginPresetPtr;
317 typedef std::list<PluginPresetPtr> PluginPresetList;
319 PluginPtr find_plugin(ARDOUR::Session&, std::string unique_id, ARDOUR::PluginType);
321 class LIBARDOUR_API PluginInfo {
324 virtual ~PluginInfo () { }
327 std::string category;
332 ARDOUR::PluginType type;
334 std::string unique_id;
336 virtual PluginPtr load (Session& session) = 0;
337 virtual bool is_instrument() const;
338 virtual bool in_category (const std::string &) const { return false; }
340 virtual std::vector<Plugin::PresetRecord> get_presets (bool user_only) const = 0;
342 /* NOTE: this block of virtual methods looks like the interface
343 to a Processor, but Plugin does not inherit from Processor.
344 It is therefore not required that these precisely match
345 the interface, but it is likely that they will evolve together.
348 /* this returns true if the plugin can change its inputs or outputs on demand.
349 LADSPA, LV2 and VST plugins cannot do this. AudioUnits can.
352 virtual bool reconfigurable_io() const { return false; }
355 friend class PluginManager;
359 } // namespace ARDOUR
361 #endif /* __ardour_plugin_h__ */