2 * Copyright (C) 2016 Robin Gareus <robin@gareus.org>
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version 2
7 * of the License, or (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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
19 #ifndef _ardour_lua_api_h_
20 #define _ardour_lua_api_h_
24 #include <boost/shared_ptr.hpp>
25 #include <vamp-hostsdk/Plugin.h>
27 #include "evoral/Note.hpp"
29 #include "ardour/libardour_visibility.h"
31 #include "ardour/processor.h"
32 #include "ardour/session.h"
38 namespace ARDOUR { namespace LuaAPI {
40 /** convenience constructor for DataType::NIL with managed lifetime
41 * @returns DataType::NIL
43 int datatype_ctor_null (lua_State *lua);
44 /** convenience constructor for DataType::AUDIO with managed lifetime
45 * @returns DataType::AUDIO
47 int datatype_ctor_audio (lua_State *L);
48 /** convenience constructor for DataType::MIDI with managed lifetime
49 * @returns DataType::MIDI
51 int datatype_ctor_midi (lua_State *L);
53 /** Create a null processor shared pointer
55 * This is useful for Track:bounce() to indicate no processing.
57 boost::shared_ptr<ARDOUR::Processor> nil_processor ();
59 /** create a new Lua Processor (Plugin)
61 * @param s Session Handle
62 * @param p Identifier or Name of the Processor
63 * @returns Processor object (may be nil)
65 boost::shared_ptr<ARDOUR::Processor> new_luaproc (ARDOUR::Session *s, const std::string& p);
69 * @param id Plugin Name, ID or URI
70 * @param type Plugin Type
71 * @returns PluginInfo or nil if not found
73 boost::shared_ptr<ARDOUR::PluginInfo> new_plugin_info (const std::string& id, ARDOUR::PluginType type);
75 /** create a new Plugin Instance
77 * @param s Session Handle
78 * @param id Plugin Name, ID or URI
79 * @param type Plugin Type
80 * @returns Processor or nil
82 boost::shared_ptr<ARDOUR::Processor> new_plugin (ARDOUR::Session *s, const std::string& id, ARDOUR::PluginType type, const std::string& preset = "");
84 /** set a plugin control-input parameter value
86 * @param proc Plugin-Processor
87 * @param which control-input to set (starting at 0)
88 * @param value value to set
89 * @returns true on success, false on error or out-of-bounds value
91 bool set_processor_param (boost::shared_ptr<ARDOUR::Processor> proc, uint32_t which, float val);
93 /** get a plugin control parameter value
95 * @param proc Plugin-Processor
96 * @param which control port to set (starting at 0, including ports of type input and output))
97 * @param ok boolean variable contains true or false after call returned. to be checked by caller before using value.
100 float get_processor_param (boost::shared_ptr<Processor> proc, uint32_t which, bool &ok);
102 /** reset a processor to its default values (only works for plugins )
104 * This is a wrapper which looks up the Processor by plugin-insert.
106 * @param proc Plugin-Insert
107 * @returns true on success, false when the processor is not a plugin
109 bool reset_processor_to_default (boost::shared_ptr<Processor> proc);
111 /** set a plugin control-input parameter value
113 * This is a wrapper around set_processor_param which looks up the Processor by plugin-insert.
115 * @param proc Plugin-Insert
116 * @param which control-input to set (starting at 0)
117 * @param value value to set
118 * @returns true on success, false on error or out-of-bounds value
120 bool set_plugin_insert_param (boost::shared_ptr<ARDOUR::PluginInsert> pi, uint32_t which, float val);
122 /** get a plugin control parameter value
124 * @param proc Plugin-Insert
125 * @param which control port to query (starting at 0, including ports of type input and output)
126 * @param ok boolean variable contains true or false after call returned. to be checked by caller before using value.
129 float get_plugin_insert_param (boost::shared_ptr<ARDOUR::PluginInsert> pi, uint32_t which, bool &ok);
132 * A convenience function to get a Automation Lists and ParamaterDescriptor
133 * for a given plugin control.
135 * This is equivalent to the following lua code
137 * function (processor, param_id)
138 * local plugininsert = processor:to_insert ()
139 * local plugin = plugininsert:plugin(0)
140 * local _, t = plugin:get_parameter_descriptor(param_id, ARDOUR.ParameterDescriptor ())
141 * local ctrl = Evoral.Parameter (ARDOUR.AutomationType.PluginAutomation, 0, param_id)
142 * local ac = pi:automation_control (ctrl, false)
143 * local acl = ac:alist()
144 * return ac:alist(), ac:to_ctrl():list(), t[2]
148 * Example usage: get the third input parameter of first plugin on the given route
149 * (Ardour starts counting at zero).
151 * local al, cl, pd = ARDOUR.LuaAPI.plugin_automation (route:nth_plugin (0), 3)
153 * @returns 3 parameters: AutomationList, ControlList, ParamaterDescriptor
155 int plugin_automation (lua_State *lua);
158 * A convenience function for colorspace HSL to RGB conversion.
159 * All ranges are 0..1
163 * local r, g, b, a = ARDOUR.LuaAPI.hsla_to_rgba (hue, saturation, luminosity, alpha)
165 * @returns 4 parameters: red, green, blue, alpha (in range 0..1)
167 int hsla_to_rgba (lua_State *lua);
170 * A convenience function to expand RGBA parameters from an integer
172 * convert a Canvas::Color (uint32_t 0xRRGGBBAA) into
173 * double RGBA values which can be passed as parameters to
174 * Cairo::Context::set_source_rgba
178 * local r, g, b, a = ARDOUR.LuaAPI.color_to_rgba (0x88aa44ff)
179 * cairo_ctx:set_source_rgba (ARDOUR.LuaAPI.color_to_rgba (0x11336699)
181 * @returns 4 parameters: red, green, blue, alpha (in range 0..1)
183 int color_to_rgba (lua_State *lua);
186 * Creates a filename from a series of elements using the correct separator for filenames.
188 * No attempt is made to force the resulting filename to be an absolute path.
189 * If the first element is a relative path, the result will be a relative path.
191 int build_filename (lua_State *lua);
194 * Generic conversion from audio sample count to timecode.
195 * (TimecodeType, sample-rate, sample-pos)
197 int sample_to_timecode (lua_State *L);
200 * Generic conversion from timecode to audio sample count.
201 * (TimecodeType, sample-rate, hh, mm, ss, ff)
203 int timecode_to_sample (lua_State *L);
206 * Use current session settings to convert
207 * audio-sample count into hh, mm, ss, ff
208 * timecode (this include session pull up/down).
210 int sample_to_timecode_lua (lua_State *L);
213 * Use current session settings to convert
214 * timecode (hh, mm, ss, ff) to audio-sample
215 * count (this include session pull up/down).
217 int timecode_to_sample_lua (lua_State *L);
220 /** Vamp Plugin Interface
222 * Vamp is an audio processing plugin system for plugins that extract descriptive information
223 * from audio data - typically referred to as audio analysis plugins or audio feature
224 * extraction plugins.
226 * This interface allows to load a plugins and directly access it using the Vamp Plugin API.
228 * A convenience method is provided to analyze Ardour::Readable objects (Regions).
231 Vamp (const std::string&, float sample_rate);
234 /** Search for all available available Vamp plugins.
235 * @returns list of plugin-keys
237 static std::vector<std::string> list_plugins ();
239 ::Vamp::Plugin* plugin () { return _plugin; }
241 /** high-level abstraction to process a single channel of the given Readable.
243 * If the plugin is not yet initialized, initialize() is called.
245 * if @cb is not nil, it is called with the immediate
246 * Vamp::Plugin::Features on every process call.
249 * @param channel channel to process
250 * @param fn lua callback function
251 * @return 0 on success
253 int analyze (boost::shared_ptr<ARDOUR::Readable> r, uint32_t channel, luabridge::LuaRef fn);
255 /** call plugin():reset() and clear intialization flag */
258 /** initialize the plugin for use with analyze().
260 * This is equivalent to plugin():initialise (1, ssiz, bsiz)
261 * and prepares a plugin for analyze.
262 * (by preferred step and block sizes are used. if the plugin
263 * does not specify them or they're larger than 8K, both are set to 1024)
265 * Manual initialization is only required to set plugin-parameters
266 * which depend on prior initialization of the plugin.
271 * vamp:plugin():setParameter (0, 1.5, nil)
272 * vamp:analyze (r, 0)
277 bool initialized () const { return _initialized; }
279 /** process given array of audio-samples.
281 * This is a lua-binding for vamp:plugin():process ()
283 * @param d audio-data, the vector must match the configured channel count
284 * and hold a complete buffer for every channel as set during
285 * plugin():initialise()
286 * @param rt timestamp matching the provided buffer.
287 * @returns features extracted from that data (if the plugin is causal)
289 ::Vamp::Plugin::FeatureSet process (const std::vector<float*>& d, ::Vamp::RealTime rt);
292 ::Vamp::Plugin* _plugin;
295 framecnt_t _stepsize;
300 boost::shared_ptr<Evoral::Note<Evoral::Beats> >
301 new_noteptr (uint8_t, Evoral::Beats, Evoral::Beats, uint8_t, uint8_t);
305 namespace ARDOUR { namespace LuaOSC {
308 * A Class to send OSC messages.
312 * OSC is kinda special, lo_address is a void* and lo_send() has varags
313 * and typed arguments which makes it hard to bind, even lo_cpp.
316 /** Construct a new OSC transmitter object
317 * @param uri the destination uri e.g. "osc.udp://localhost:7890"
319 Address (std::string uri) {
320 _addr = lo_address_new_from_url (uri.c_str());
323 ~Address () { if (_addr) { lo_address_free (_addr); } }
324 /** Transmit an OSC message
326 * Path (string) and type (string) must always be given.
327 * The number of following args must match the type.
328 * Supported types are:
330 * 'i': integer (lua number)
332 * 'f': float (lua number)
334 * 'd': double (lua number)
336 * 'h': 64bit integer (lua number)
338 * 's': string (lua string)
340 * 'c': character (lua string)
342 * 'T': boolean (lua bool) -- this is not implicily True, a lua true/false must be given
344 * 'F': boolean (lua bool) -- this is not implicily False, a lua true/false must be given
346 * @param lua: lua arguments: path, types, ...
347 * @returns boolean true if successful, false on error.
349 int send (lua_State *lua);
361 int get (lua_State* L);
362 int set (lua_State* L);
365 struct LuaTableEntry {
366 LuaTableEntry (int kt, int vt)
387 std::vector<LuaTableEntry> _data;
389 static void* findclasskey (lua_State *L, const void* key);
391 static void assign (luabridge::LuaRef* rv, T key, const LuaTableEntry& s);
396 #endif // _ardour_lua_api_h_