2 Copyright (C) 2016 Robin Gareus <robin@gareus.org>
3 Copyright (C) 2006 Paul Davis
5 This program is free software; you can redistribute it and/or modify it
6 under the terms of the GNU General Public License as published by the Free
7 Software Foundation; either version 2 of the License, or (at your option)
10 This program is distributed in the hope that it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 You should have received a copy of the GNU General Public License along
16 with this program; if not, write to the Free Software Foundation, Inc.,
17 675 Mass Ave, Cambridge, MA 02139, USA.
21 #include "pbd/gstdio_compat.h"
23 #include "pbd/pthread_utils.h"
25 #include "ardour/audio_buffer.h"
26 #include "ardour/buffer_set.h"
27 #include "ardour/luabindings.h"
28 #include "ardour/luaproc.h"
29 #include "ardour/luascripting.h"
30 #include "ardour/midi_buffer.h"
31 #include "ardour/plugin.h"
32 #include "ardour/session.h"
34 #include "LuaBridge/LuaBridge.h"
38 using namespace ARDOUR;
41 LuaProc::LuaProc (AudioEngine& engine,
43 const std::string &script)
44 : Plugin (engine, session)
45 , _mempool ("LuaProc", 1048576) // 1 MB is plenty. (64K would be enough)
46 , lua (lua_newstate (&PBD::ReallocPool::lalloc, &_mempool))
49 , _lua_does_channelmapping (false)
50 , _lua_has_inline_display (false)
53 , _has_midi_input (false)
54 , _has_midi_output (false)
58 /* when loading a session, or pasing a processor,
59 * the script is set during set_state();
61 if (!_script.empty () && load_script ()) {
62 throw failed_constructor ();
66 LuaProc::LuaProc (const LuaProc &other)
68 , _mempool ("LuaProc", 1048576) // 1 MB is plenty. (64K would be enough)
69 , lua (lua_newstate (&PBD::ReallocPool::lalloc, &_mempool))
71 , _script (other.script ())
72 , _lua_does_channelmapping (false)
73 , _lua_has_inline_display (false)
76 , _has_midi_input (false)
77 , _has_midi_output (false)
82 throw failed_constructor ();
85 for (uint32_t i = 0; i < parameter_count (); ++i) {
86 _control_data[i] = other._shadow_data[i];
87 _shadow_data[i] = other._shadow_data[i];
91 LuaProc::~LuaProc () {
92 #ifdef WITH_LUAPROC_STATS
93 if (_info && _stats_cnt > 0) {
94 printf ("LuaProc: '%s' run() avg: %.3f max: %.3f [ms]\n",
96 0.0001f * _stats_avg[0] / (float) _stats_cnt,
97 0.0001f * _stats_max[0]);
98 printf ("LuaProc: '%s' gc() avg: %.3f max: %.3f [ms]\n",
100 0.0001f * _stats_avg[1] / (float) _stats_cnt,
101 0.0001f * _stats_max[1]);
104 lua.do_command ("collectgarbage();");
106 delete [] _control_data;
107 delete [] _shadow_data;
113 #ifdef WITH_LUAPROC_STATS
114 _stats_avg[0] = _stats_avg[1] = _stats_max[0] = _stats_max[1] = _stats_cnt = 0;
118 lua.Print.connect (sigc::mem_fun (*this, &LuaProc::lua_print));
120 // register session object
121 lua_State* L = lua.getState ();
122 LuaBindings::stddef (L);
123 LuaBindings::common (L);
124 LuaBindings::dsp (L);
126 luabridge::getGlobalNamespace (L)
127 .beginNamespace ("Ardour")
128 .beginClass <LuaProc> ("LuaProc")
129 .addFunction ("queue_draw", &LuaProc::queue_draw)
130 .addFunction ("shmem", &LuaProc::instance_shm)
134 // add session to global lua namespace
135 luabridge::push <Session *> (L, &_session);
136 lua_setglobal (L, "Session");
139 luabridge::push <LuaProc *> (L, this);
140 lua_setglobal (L, "self");
143 lua.do_command ("io = nil os = nil loadfile = nil require = nil dofile = nil package = nil debug = nil");
145 lua.do_command ("for n in pairs(_G) do print(n) end print ('----')"); // print global env
147 lua.do_command ("function ardour () end");
151 LuaProc::lua_print (std::string s) {
152 std::cout <<"LuaProc: " << s << "\n";
156 LuaProc::load_script ()
158 assert (!_lua_dsp); // don't allow to re-initialize
160 // TODO: refine APIs; function arguments..
161 // - perform channel-map in ardour (silent/scratch buffers) ?
162 // - control-port API (explicit get/set functions ??)
163 // - latency reporting (global var? ctrl-port? set-function ?)
164 // - MIDI -> sparse table of events
165 // { [sample] => { Event }, .. }
166 // or { { sample, Event }, .. }
169 LuaScriptInfoPtr lsi = LuaScripting::script_info (_script);
170 LuaPluginInfoPtr lpi (new LuaPluginInfo (lsi));
173 _mempool.set_name ("LuaProc: " + lsi->name);
174 _docs = lsi->description;
175 } catch (failed_constructor& err) {
179 lua_State* L = lua.getState ();
180 lua.do_command (_script);
182 // check if script has a DSP callback
183 luabridge::LuaRef lua_dsp_run = luabridge::getGlobal (L, "dsp_run");
184 luabridge::LuaRef lua_dsp_map = luabridge::getGlobal (L, "dsp_runmap");
186 if ((lua_dsp_run.type () != LUA_TFUNCTION) == (lua_dsp_map.type () != LUA_TFUNCTION)) {
190 if (lua_dsp_run.type () == LUA_TFUNCTION) {
191 _lua_dsp = new luabridge::LuaRef (lua_dsp_run);
193 else if (lua_dsp_map.type () == LUA_TFUNCTION) {
194 _lua_dsp = new luabridge::LuaRef (lua_dsp_map);
195 _lua_does_channelmapping = true;
201 // initialize the DSP if needed
202 luabridge::LuaRef lua_dsp_init = luabridge::getGlobal (L, "dsp_init");
203 if (lua_dsp_init.type () == LUA_TFUNCTION) {
205 lua_dsp_init (_session.nominal_frame_rate ());
206 } catch (luabridge::LuaException const& e) {
211 luabridge::LuaRef lua_dsp_midi_in = luabridge::getGlobal (L, "dsp_midi_input");
212 if (lua_dsp_midi_in.type () == LUA_TFUNCTION) {
214 _has_midi_input = lua_dsp_midi_in ();
215 } catch (luabridge::LuaException const& e) {
220 _ctrl_params.clear ();
222 luabridge::LuaRef lua_render = luabridge::getGlobal (L, "render_inline");
223 if (lua_render.isFunction ()) {
224 _lua_has_inline_display = true;
227 luabridge::LuaRef lua_params = luabridge::getGlobal (L, "dsp_params");
228 if (lua_params.isFunction ()) {
230 // call function // add try {} catch (luabridge::LuaException const& e)
231 luabridge::LuaRef params = lua_params ();
233 if (params.isTable ()) {
235 for (luabridge::Iterator i (params); !i.isNil (); ++i) {
237 if (!i.key ().isNumber ()) { return false; }
238 if (!i.value ().isTable ()) { return false; }
239 if (!i.value ()["type"].isString ()) { return false; }
240 if (!i.value ()["name"].isString ()) { return false; }
241 if (!i.value ()["min"].isNumber ()) { return false; }
242 if (!i.value ()["max"].isNumber ()) { return false; }
244 int pn = i.key ().cast<int> ();
245 std::string type = i.value ()["type"].cast<std::string> ();
246 if (type == "input") {
247 if (!i.value ()["default"].isNumber ()) { return false; }
248 _ctrl_params.push_back (std::make_pair (false, pn));
250 else if (type == "output") {
251 _ctrl_params.push_back (std::make_pair (true, pn));
255 assert (pn == (int) _ctrl_params.size ());
257 //_param_desc[pn] = boost::shared_ptr<ParameterDescriptor> (new ParameterDescriptor());
258 luabridge::LuaRef lr = i.value ();
260 if (type == "input") {
261 _param_desc[pn].normal = lr["default"].cast<float> ();
263 _param_desc[pn].normal = lr["min"].cast<float> (); // output-port, no default
265 _param_desc[pn].lower = lr["min"].cast<float> ();
266 _param_desc[pn].upper = lr["max"].cast<float> ();
267 _param_desc[pn].toggled = lr["toggled"].isBoolean () && (lr["toggled"]).cast<bool> ();
268 _param_desc[pn].logarithmic = lr["logarithmic"].isBoolean () && (lr["logarithmic"]).cast<bool> ();
269 _param_desc[pn].integer_step = lr["integer"].isBoolean () && (lr["integer"]).cast<bool> ();
270 _param_desc[pn].sr_dependent = lr["ratemult"].isBoolean () && (lr["ratemult"]).cast<bool> ();
271 _param_desc[pn].enumeration = lr["enum"].isBoolean () && (lr["enum"]).cast<bool> ();
273 if (lr["unit"].isString ()) {
274 std::string unit = lr["unit"].cast<std::string> ();
275 if (unit == "dB") { _param_desc[pn].unit = ParameterDescriptor::DB; }
276 else if (unit == "Hz") { _param_desc[pn].unit = ParameterDescriptor::HZ; }
277 else if (unit == "Midi Note") { _param_desc[pn].unit = ParameterDescriptor::MIDI_NOTE; }
279 _param_desc[pn].label = (lr["name"]).cast<std::string> ();
280 _param_desc[pn].scale_points = parse_scale_points (&lr);
282 luabridge::LuaRef doc = lr["doc"];
283 if (doc.isString ()) {
284 _param_doc[pn] = doc.cast<std::string> ();
288 assert (!(_param_desc[pn].toggled && _param_desc[pn].logarithmic));
293 _control_data = new float[parameter_count ()];
294 _shadow_data = new float[parameter_count ()];
296 for (uint32_t i = 0; i < parameter_count (); ++i) {
297 if (parameter_is_input (i)) {
298 _control_data[i] = _shadow_data[i] = default_value (i);
302 // expose ctrl-ports to global lua namespace
303 luabridge::push <float *> (L, _control_data);
304 lua_setglobal (L, "CtrlPorts");
306 return false; // no error
310 LuaProc::can_support_io_configuration (const ChanCount& in, ChanCount& out, ChanCount* imprecise)
312 // caller must hold process lock (no concurrent calls to interpreter
314 if (in.n_midi() > 0 && !_has_midi_input && !imprecise) {
318 lua_State* L = lua.getState ();
319 luabridge::LuaRef ioconfig = luabridge::getGlobal (L, "dsp_ioconfig");
320 if (!ioconfig.isFunction ()) {
324 luabridge::LuaRef table = luabridge::getGlobal (L, "table"); //lua std lib
325 luabridge::LuaRef tablesort = table["sort"];
326 assert (tablesort.isFunction ());
328 luabridge::LuaRef *_iotable = NULL; // can't use reference :(
330 luabridge::LuaRef iotable = ioconfig ();
332 if (iotable.isTable ()) {
333 _iotable = new luabridge::LuaRef (iotable);
335 } catch (luabridge::LuaException const& e) {
343 // now we can reference it.
344 luabridge::LuaRef iotable (*_iotable);
347 if ((iotable).length () < 1) {
351 const int32_t audio_in = in.n_audio ();
353 int32_t midi_out = 0; // TODO handle _has_midi_output
355 if (in.n_midi() > 0 && audio_in == 0) {
356 audio_out = 2; // prefer stereo version if available.
358 audio_out = audio_in;
362 for (luabridge::Iterator i (iotable); !i.isNil (); ++i) {
363 assert (i.value ().type () == LUA_TTABLE);
364 luabridge::LuaRef io (i.value ());
366 int possible_in = io["audio_in"];
367 int possible_out = io["audio_out"];
370 if ((possible_in == audio_in) && (possible_out == audio_out)) {
371 out.set (DataType::MIDI, 0);
372 out.set (DataType::AUDIO, audio_out);
377 /* now allow potentially "imprecise" matches */
381 for (luabridge::Iterator i (iotable); !i.isNil (); ++i) {
382 assert (i.value ().type () == LUA_TTABLE);
383 luabridge::LuaRef io (i.value ());
385 int possible_in = io["audio_in"];
386 int possible_out = io["audio_out"];
388 if (possible_out == 0) {
391 if (possible_in == 0) {
392 /* no inputs, generators & instruments */
393 if (possible_out == -1) {
394 /* any configuration possible, provide stereo output */
397 } else if (possible_out == -2) {
398 /* invalid, should be (0, -1) */
401 } else if (possible_out < -2) {
402 /* variable number of outputs. -> whatever */
406 /* exact number of outputs */
407 audio_out = possible_out;
412 if (possible_in == -1) {
413 /* wildcard for input */
414 if (possible_out == -1) {
415 /* out must match in */
416 audio_out = audio_in;
418 } else if (possible_out == -2) {
419 /* any configuration possible, pick matching */
420 audio_out = audio_in;
422 } else if (possible_out < -2) {
423 /* explicitly variable number of outputs, pick maximum */
424 audio_out = -possible_out;
427 /* exact number of outputs */
428 audio_out = possible_out;
433 if (possible_in == -2) {
435 if (possible_out == -1) {
436 /* any configuration possible, pick matching */
437 audio_out = audio_in;
439 } else if (possible_out == -2) {
440 /* invalid. interpret as (-1, -1) */
441 audio_out = audio_in;
443 } else if (possible_out < -2) {
444 /* explicitly variable number of outputs, pick maximum */
445 audio_out = -possible_out;
448 /* exact number of outputs */
449 audio_out = possible_out;
454 if (possible_in < -2) {
455 /* explicit variable number of inputs */
456 if (audio_in > -possible_in && imprecise != NULL) {
458 imprecise->set (DataType::AUDIO, -possible_in);
461 if (audio_in > -possible_in && imprecise == NULL) {
462 /* request is too large */
463 } else if (possible_out == -1) {
464 /* any output configuration possible, provide stereo out */
467 } else if (possible_out == -2) {
468 /* invalid. interpret as (<-2, -1) */
471 } else if (possible_out < -2) {
472 /* explicitly variable number of outputs, pick stereo */
476 /* exact number of outputs */
477 audio_out = possible_out;
482 if (possible_in && (possible_in == audio_in)) {
483 /* exact number of inputs ... must match obviously */
484 if (possible_out == -1) {
485 /* any output configuration possible, provide stereo output */
488 } else if (possible_out == -2) {
489 /* invalid. interpret as (>0, -1) */
492 } else if (possible_out < -2) {
493 /* explicitly variable number of outputs, pick maximum */
494 audio_out = -possible_out;
497 /* exact number of outputs */
498 audio_out = possible_out;
508 if (!found && imprecise) {
510 for (luabridge::Iterator i (iotable); !i.isNil (); ++i) {
511 assert (i.value ().type () == LUA_TTABLE);
512 luabridge::LuaRef io (i.value ());
514 int possible_in = io["audio_in"];
515 int possible_out = io["audio_out"];
517 assert (possible_in > 0); // all other cases will have been matched above
518 assert (possible_out !=0 || possible_in !=0); // already handled above
520 imprecise->set (DataType::AUDIO, possible_in);
521 if (possible_out == -1 || possible_out == -2) {
524 } else if (possible_out < -2) {
525 /* explicitly variable number of outputs, pick maximum */
526 audio_out = -possible_out;
529 /* exact number of outputs */
530 audio_out = possible_out;
535 // ideally we'll keep iterating and take the "best match"
536 // whatever "best" means:
537 // least unconnected inputs, least silenced inputs,
538 // closest match of inputs == outputs
549 out.set (DataType::MIDI, midi_out); // currently always zero
550 out.set (DataType::AUDIO, audio_out);
555 LuaProc::configure_io (ChanCount in, ChanCount out)
558 _configured_out = out;
560 _configured_in.set (DataType::MIDI, _has_midi_input ? 1 : 0);
561 _configured_out.set (DataType::MIDI, _has_midi_output ? 1 : 0);
563 // configure the DSP if needed
564 lua_State* L = lua.getState ();
565 luabridge::LuaRef lua_dsp_configure = luabridge::getGlobal (L, "dsp_configure");
566 if (lua_dsp_configure.type () == LUA_TFUNCTION) {
568 lua_dsp_configure (&in, &out);
569 } catch (luabridge::LuaException const& e) {
574 _info->n_inputs = _configured_in;
575 _info->n_outputs = _configured_out;
580 LuaProc::connect_and_run (BufferSet& bufs,
581 ChanMapping in, ChanMapping out,
582 pframes_t nframes, framecnt_t offset)
588 Plugin::connect_and_run (bufs, in, out, nframes, offset);
590 // This is needed for ARDOUR::Session requests :(
591 if (! SessionEvent::has_per_thread_pool ()) {
593 snprintf (name, 64, "Proc-%p", this);
594 pthread_set_name (name);
595 SessionEvent::create_per_thread_pool (name, 64);
596 PBD::notify_event_loops_about_thread_creation (pthread_self(), name, 64);
599 uint32_t const n = parameter_count ();
600 for (uint32_t i = 0; i < n; ++i) {
601 if (parameter_is_control (i) && parameter_is_input (i)) {
602 _control_data[i] = _shadow_data[i];
606 #ifdef WITH_LUAPROC_STATS
607 int64_t t0 = g_get_monotonic_time ();
611 if (_lua_does_channelmapping) {
612 // run the DSP function
613 (*_lua_dsp)(&bufs, in, out, nframes, offset);
616 BufferSet& silent_bufs = _session.get_silent_buffers (ChanCount (DataType::AUDIO, 1));
617 BufferSet& scratch_bufs = _session.get_scratch_buffers (ChanCount (DataType::AUDIO, 1));
619 lua_State* L = lua.getState ();
620 luabridge::LuaRef in_map (luabridge::newTable (L));
621 luabridge::LuaRef out_map (luabridge::newTable (L));
623 const uint32_t audio_in = _configured_in.n_audio ();
624 const uint32_t audio_out = _configured_out.n_audio ();
625 const uint32_t midi_in = _configured_in.n_midi ();
627 for (uint32_t ap = 0; ap < audio_in; ++ap) {
629 const uint32_t buf_index = in.get(DataType::AUDIO, ap, &valid);
631 in_map[ap + 1] = bufs.get_audio (buf_index).data (offset);
633 in_map[ap + 1] = silent_bufs.get_audio (0).data (offset);
636 for (uint32_t ap = 0; ap < audio_out; ++ap) {
638 const uint32_t buf_index = out.get(DataType::AUDIO, ap, &valid);
640 out_map[ap + 1] = bufs.get_audio (buf_index).data (offset);
642 out_map[ap + 1] = scratch_bufs.get_audio (0).data (offset);
646 luabridge::LuaRef lua_midi_tbl (luabridge::newTable (L));
647 int e = 1; // > 1 port, we merge events (unsorted)
648 for (uint32_t mp = 0; mp < midi_in; ++mp) {
650 const uint32_t idx = in.get(DataType::MIDI, mp, &valid);
652 for (MidiBuffer::iterator m = bufs.get_midi(idx).begin();
653 m != bufs.get_midi(idx).end(); ++m, ++e) {
654 const Evoral::MIDIEvent<framepos_t> ev(*m, false);
655 luabridge::LuaRef lua_midi_data (luabridge::newTable (L));
656 const uint8_t* data = ev.buffer();
657 for (uint32_t i = 0; i < ev.size(); ++i) {
658 lua_midi_data [i + 1] = data[i];
660 luabridge::LuaRef lua_midi_event (luabridge::newTable (L));
661 lua_midi_event["time"] = 1 + (*m).time();
662 lua_midi_event["data"] = lua_midi_data;
663 lua_midi_tbl[e] = lua_midi_event;
668 if (_has_midi_input) {
669 // XXX TODO This needs a better solution than global namespace
670 luabridge::push (L, lua_midi_tbl);
671 lua_setglobal (L, "mididata");
675 // run the DSP function
676 (*_lua_dsp)(in_map, out_map, nframes);
678 } catch (luabridge::LuaException const& e) {
680 printf ("LuaException: %s\n", e.what ());
684 #ifdef WITH_LUAPROC_STATS
685 int64_t t1 = g_get_monotonic_time ();
687 lua.collect_garbage (); // rt-safe, slight *regular* performance overhead
688 #ifdef WITH_LUAPROC_STATS
690 int64_t t2 = g_get_monotonic_time ();
691 int64_t ela0 = t1 - t0;
692 int64_t ela1 = t2 - t1;
693 if (ela0 > _stats_max[0]) _stats_max[0] = ela0;
694 if (ela1 > _stats_max[1]) _stats_max[1] = ela1;
695 _stats_avg[0] += ela0;
696 _stats_avg[1] += ela1;
703 LuaProc::add_state (XMLNode* root) const
707 LocaleGuard lg(X_("C"));
709 gchar* b64 = g_base64_encode ((const guchar*)_script.c_str (), _script.size ());
710 std::string b64s (b64);
712 XMLNode* script_node = new XMLNode (X_("script"));
713 script_node->add_property (X_("lua"), LUA_VERSION);
714 script_node->add_content (b64s);
715 root->add_child_nocopy (*script_node);
717 for (uint32_t i = 0; i < parameter_count(); ++i) {
718 if (parameter_is_input(i) && parameter_is_control(i)) {
719 child = new XMLNode("Port");
720 snprintf(buf, sizeof(buf), "%u", i);
721 child->add_property("id", std::string(buf));
722 snprintf(buf, sizeof(buf), "%+f", _shadow_data[i]);
723 child->add_property("value", std::string(buf));
724 root->add_child_nocopy(*child);
730 LuaProc::set_script_from_state (const XMLNode& node)
733 if (node.name () != state_node_name ()) {
737 if ((child = node.child (X_("script"))) != 0) {
738 for (XMLNodeList::const_iterator n = child->children ().begin (); n != child->children ().end (); ++n) {
739 if (!(*n)->is_content ()) { continue; }
741 guchar* buf = g_base64_decode ((*n)->content ().c_str (), &size);
742 _script = std::string ((const char*)buf, size);
744 if (load_script ()) {
745 PBD::error << _("Failed to load Lua script from session state.") << endmsg;
747 std::cerr << "Failed Lua Script: " << _script << std::endl;
754 if (_script.empty ()) {
755 PBD::error << _("Session State for LuaProcessor did not include a Lua script.") << endmsg;
759 PBD::error << _("Invalid/incompatible Lua script found for LuaProcessor.") << endmsg;
766 LuaProc::set_state (const XMLNode& node, int version)
768 #ifndef NO_PLUGIN_STATE
771 XMLNodeConstIterator iter;
777 LocaleGuard lg (X_("C"));
779 if (_script.empty ()) {
780 if (set_script_from_state (node)) {
785 #ifndef NO_PLUGIN_STATE
786 if (node.name() != state_node_name()) {
787 error << _("Bad node sent to LuaProc::set_state") << endmsg;
791 nodes = node.children ("Port");
792 for (iter = nodes.begin(); iter != nodes.end(); ++iter) {
794 if ((prop = child->property("id")) != 0) {
795 port = prop->value().c_str();
797 warning << _("LuaProc: port has no symbol, ignored") << endmsg;
800 if ((prop = child->property("value")) != 0) {
801 value = prop->value().c_str();
803 warning << _("LuaProc: port has no value, ignored") << endmsg;
806 sscanf (port, "%" PRIu32, &port_id);
807 set_parameter (port_id, atof(value));
811 return Plugin::set_state (node, version);
815 LuaProc::parameter_count () const
817 return _ctrl_params.size ();
821 LuaProc::default_value (uint32_t port)
823 if (_ctrl_params[port].first) {
827 int lp = _ctrl_params[port].second;
828 return _param_desc[lp].normal;
832 LuaProc::set_parameter (uint32_t port, float val)
834 assert (port < parameter_count ());
835 if (get_parameter (port) == val) {
838 _shadow_data[port] = val;
839 Plugin::set_parameter (port, val);
843 LuaProc::get_parameter (uint32_t port) const
845 if (parameter_is_input (port)) {
846 return _shadow_data[port];
848 return _control_data[port];
853 LuaProc::get_parameter_descriptor (uint32_t port, ParameterDescriptor& desc) const
855 assert (port <= parameter_count ());
856 int lp = _ctrl_params[port].second;
857 const ParameterDescriptor& d (_param_desc.find(lp)->second);
859 desc.lower = d.lower;
860 desc.upper = d.upper;
861 desc.normal = d.normal;
862 desc.toggled = d.toggled;
863 desc.logarithmic = d.logarithmic;
864 desc.integer_step = d.integer_step;
865 desc.sr_dependent = d.sr_dependent;
866 desc.enumeration = d.enumeration;
868 desc.label = d.label;
869 desc.scale_points = d.scale_points;
871 desc.update_steps ();
876 LuaProc::get_parameter_docs (uint32_t port) const {
877 assert (port <= parameter_count ());
878 int lp = _ctrl_params[port].second;
879 return _param_doc.find(lp)->second;
883 LuaProc::nth_parameter (uint32_t port, bool& ok) const
885 if (port < _ctrl_params.size ()) {
894 LuaProc::parameter_is_input (uint32_t port) const
896 assert (port < _ctrl_params.size ());
897 return (!_ctrl_params[port].first);
901 LuaProc::parameter_is_output (uint32_t port) const
903 assert (port < _ctrl_params.size ());
904 return (_ctrl_params[port].first);
907 std::set<Evoral::Parameter>
908 LuaProc::automatable () const
910 std::set<Evoral::Parameter> automatables;
911 for (uint32_t i = 0; i < _ctrl_params.size (); ++i) {
912 if (parameter_is_input (i)) {
913 automatables.insert (automatables.end (), Evoral::Parameter (PluginAutomation, 0, i));
920 LuaProc::describe_parameter (Evoral::Parameter param)
922 if (param.type () == PluginAutomation && param.id () < parameter_count ()) {
923 int lp = _ctrl_params[param.id ()].second;
924 return _param_desc[lp].label;
930 LuaProc::print_parameter (uint32_t param, char* buf, uint32_t len) const
933 if (param < parameter_count ()) {
934 snprintf (buf, len, "%.3f", get_parameter (param));
941 boost::shared_ptr<ScalePoints>
942 LuaProc::parse_scale_points (luabridge::LuaRef* lr)
944 if (!(*lr)["scalepoints"].isTable()) {
945 return boost::shared_ptr<ScalePoints> ();
949 boost::shared_ptr<ScalePoints> rv = boost::shared_ptr<ScalePoints>(new ScalePoints());
950 luabridge::LuaRef scalepoints ((*lr)["scalepoints"]);
952 for (luabridge::Iterator i (scalepoints); !i.isNil (); ++i) {
953 if (!i.key ().isString ()) { continue; }
954 if (!i.value ().isNumber ()) { continue; }
955 rv->insert(make_pair(i.key ().cast<std::string> (),
956 i.value ().cast<float> ()));
960 if (rv->size() > 0) {
963 return boost::shared_ptr<ScalePoints> ();
966 boost::shared_ptr<ScalePoints>
967 LuaProc::get_scale_points (uint32_t port) const
969 int lp = _ctrl_params[port].second;
970 return _param_desc.find(lp)->second.scale_points;
974 LuaProc::setup_lua_inline_gui (LuaState *lua_gui)
976 lua_State* LG = lua_gui->getState ();
977 LuaBindings::stddef (LG);
978 LuaBindings::common (LG);
979 LuaBindings::dsp (LG);
982 lua_gui->Print.connect (sigc::mem_fun (*this, &LuaProc::lua_print));
985 lua_gui->do_command ("function ardour () end");
986 lua_gui->do_command (_script);
988 // TODO think: use a weak-pointer here ?
989 // (the GUI itself uses a shared ptr to this plugin, so we should be good)
990 luabridge::getGlobalNamespace (LG)
991 .beginNamespace ("Ardour")
992 .beginClass <LuaProc> ("LuaProc")
993 .addFunction ("shmem", &LuaProc::instance_shm)
997 luabridge::push <LuaProc *> (LG, this);
998 lua_setglobal (LG, "self");
1000 luabridge::push <float *> (LG, _shadow_data);
1001 lua_setglobal (LG, "CtrlPorts");
1004 ////////////////////////////////////////////////////////////////////////////////
1005 #include <glibmm/miscutils.h>
1006 #include <glibmm/fileutils.h>
1008 LuaPluginInfo::LuaPluginInfo (LuaScriptInfoPtr lsi) {
1009 if (lsi->type != LuaScriptInfo::DSP) {
1010 throw failed_constructor ();
1015 creator = lsi->author;
1016 category = lsi->category;
1017 unique_id = "luascript"; // the interpreter is not unique.
1019 n_inputs.set (DataType::AUDIO, 1);
1020 n_outputs.set (DataType::AUDIO, 1);
1025 LuaPluginInfo::load (Session& session)
1027 std::string script = "";
1028 if (!Glib::file_test (path, Glib::FILE_TEST_EXISTS)) {
1029 return PluginPtr ();
1033 script = Glib::file_get_contents (path);
1034 } catch (Glib::FileError err) {
1035 return PluginPtr ();
1038 if (script.empty ()) {
1039 return PluginPtr ();
1043 PluginPtr plugin (new LuaProc (session.engine (), session, script));
1045 } catch (failed_constructor& err) {
1048 return PluginPtr ();
1051 std::vector<Plugin::PresetRecord>
1052 LuaPluginInfo::get_presets (bool /*user_only*/) const
1054 std::vector<Plugin::PresetRecord> p;