--- /dev/null
+/*
+ Copyright (C) 2016 Robin Gareus <robin@gareus.org>
+ Copyright (C) 2006 Paul Davis
+
+ This program is free software; you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published by the Free
+ Software Foundation; either version 2 of the License, or (at your option)
+ any later version.
+
+ This program is distributed in the hope that it will be useful, but WITHOUT
+ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ for more details.
+
+ You should have received a copy of the GNU General Public License along
+ with this program; if not, write to the Free Software Foundation, Inc.,
+ 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include <glib.h>
+#include "pbd/gstdio_compat.h"
+
+#include "pbd/pthread_utils.h"
+
+#include "ardour/audio_buffer.h"
+#include "ardour/buffer_set.h"
+#include "ardour/luabindings.h"
+#include "ardour/luaproc.h"
+#include "ardour/luascripting.h"
+#include "ardour/midi_buffer.h"
+#include "ardour/plugin.h"
+#include "ardour/session.h"
+
+#include "i18n.h"
+
+using namespace ARDOUR;
+using namespace PBD;
+
+LuaProc::LuaProc (AudioEngine& engine,
+ Session& session,
+ const std::string &script)
+ : Plugin (engine, session)
+ , _mempool ("LuaProc", 1048576) // 1 MB is plenty. (64K would be enough)
+ , lua (lua_newstate (&PBD::ReallocPool::lalloc, &_mempool))
+ , _lua_dsp (0)
+ , _lua_params (0)
+ , _script (script)
+ , _lua_does_channelmapping (false)
+ , _control_data (0)
+ , _shadow_data (0)
+ , _has_midi_input (false)
+ , _has_midi_output (false)
+{
+ init ();
+
+ /* when loading a session, or pasing a processor,
+ * the script is set during set_state();
+ */
+ if (!_script.empty () && load_script ()) {
+ throw failed_constructor ();
+ }
+}
+
+LuaProc::LuaProc (const LuaProc &other)
+ : Plugin (other)
+ , _mempool ("LuaProc", 1048576) // 1 MB is plenty. (64K would be enough)
+ , lua (lua_newstate (&PBD::ReallocPool::lalloc, &_mempool))
+ , _lua_dsp (0)
+ , _lua_params (0)
+ , _script (other.script ())
+ , _lua_does_channelmapping (false)
+ , _control_data (0)
+ , _shadow_data (0)
+ , _has_midi_input (false)
+ , _has_midi_output (false)
+{
+ init ();
+
+ if (load_script ()) {
+ throw failed_constructor ();
+ }
+
+ for (uint32_t i = 0; i < parameter_count (); ++i) {
+ _control_data[i] = other._shadow_data[i];
+ _shadow_data[i] = other._shadow_data[i];
+ }
+}
+
+LuaProc::~LuaProc () {
+#ifdef WITH_LUAPROC_STATS
+ if (_info && _stats_cnt > 0) {
+ printf ("LuaProc: '%s' run() avg: %.3f max: %.3f [ms]\n",
+ _info->name.c_str (),
+ 0.0001f * _stats_avg[0] / (float) _stats_cnt,
+ 0.0001f * _stats_max[0]);
+ printf ("LuaProc: '%s' gc() avg: %.3f max: %.3f [ms]\n",
+ _info->name.c_str (),
+ 0.0001f * _stats_avg[1] / (float) _stats_cnt,
+ 0.0001f * _stats_max[1]);
+ }
+#endif
+ lua.do_command ("collectgarbage();");
+ delete (_lua_dsp);
+ delete (_lua_params);
+ delete [] _control_data;
+ delete [] _shadow_data;
+}
+
+void
+LuaProc::init ()
+{
+#ifdef WITH_LUAPROC_STATS
+ _stats_avg[0] = _stats_avg[1] = _stats_max[0] = _stats_max[1] = _stats_cnt = 0;
+#endif
+
+#ifndef NDEBUG
+ lua.Print.connect (sigc::mem_fun (*this, &LuaProc::lua_print));
+#endif
+ // register session object
+ lua_State* L = lua.getState ();
+ LuaBindings::stddef (L);
+ LuaBindings::common (L);
+ LuaBindings::dsp (L);
+
+ // add session to global lua namespace
+ luabridge::push <Session *> (L, &_session);
+ lua_setglobal (L, "Session");
+
+ // sandbox
+ lua.do_command ("io = nil os = nil loadfile = nil require = nil dofile = nil package = nil debug = nil");
+#if 0
+ lua.do_command ("for n in pairs(_G) do print(n) end print ('----')"); // print global env
+#endif
+ lua.do_command ("function ardour () end");
+}
+
+void
+LuaProc::lua_print (std::string s) {
+ std::cout <<"LuaProc: " << s << "\n";
+}
+
+bool
+LuaProc::load_script ()
+{
+ assert (!_lua_dsp); // don't allow to re-initialize
+
+ // TODO: refine APIs; function arguments..
+ // - perform channel-map in ardour (silent/scratch buffers) ?
+ // - control-port API (explicit get/set functions ??)
+ // - latency reporting (global var? ctrl-port? set-function ?)
+ // - MIDI -> sparse table of events
+ // { [sample] => { Event }, .. }
+ // or { { sample, Event }, .. }
+
+ try {
+ LuaScriptInfoPtr lsi = LuaScripting::script_info (_script);
+ LuaPluginInfoPtr lpi (new LuaPluginInfo (lsi));
+ assert (lpi);
+ set_info (lpi);
+ _mempool.set_name ("LuaProc: " + lsi->name);
+ _docs = lsi->description;
+ } catch (failed_constructor& err) {
+ return true;
+ }
+
+ lua_State* L = lua.getState ();
+ lua.do_command (_script);
+
+ // check if script has a DSP callback
+ luabridge::LuaRef lua_dsp_run = luabridge::getGlobal (L, "dsp_run");
+ luabridge::LuaRef lua_dsp_map = luabridge::getGlobal (L, "dsp_runmap");
+
+ if ((lua_dsp_run.type () != LUA_TFUNCTION) == (lua_dsp_map.type () != LUA_TFUNCTION)) {
+ return true;
+ }
+
+ if (lua_dsp_run.type () == LUA_TFUNCTION) {
+ _lua_dsp = new luabridge::LuaRef (lua_dsp_run);
+ }
+ else if (lua_dsp_map.type () == LUA_TFUNCTION) {
+ _lua_dsp = new luabridge::LuaRef (lua_dsp_map);
+ _lua_does_channelmapping = true;
+ }
+ else {
+ assert (0);
+ }
+
+ // initialize the DSP if needed
+ luabridge::LuaRef lua_dsp_init = luabridge::getGlobal (L, "dsp_init");
+ if (lua_dsp_init.type () == LUA_TFUNCTION) {
+ try {
+ lua_dsp_init (_session.nominal_frame_rate ());
+ } catch (luabridge::LuaException const& e) {
+ ;
+ }
+ }
+
+ luabridge::LuaRef lua_dsp_midi_in = luabridge::getGlobal (L, "dsp_midi_input");
+ if (lua_dsp_midi_in.type () == LUA_TFUNCTION) {
+ try {
+ _has_midi_input = lua_dsp_midi_in ();
+ } catch (luabridge::LuaException const& e) {
+ ;
+ }
+ }
+
+ _ctrl_params.clear ();
+
+ luabridge::LuaRef lua_params = luabridge::getGlobal (L, "dsp_params");
+ if (lua_params.isFunction ()) {
+
+ // call function // add try {} catch (luabridge::LuaException const& e)
+ luabridge::LuaRef params = lua_params ();
+
+ if (params.isTable ()) {
+
+ _lua_params = new luabridge::LuaRef (params);
+
+ for (luabridge::Iterator i (params); !i.isNil (); ++i) {
+ // required fields
+ if (!i.key ().isNumber ()) { return false; }
+ if (!i.value ().isTable ()) { return false; }
+ if (!i.value ()["type"].isString ()) { return false; }
+ if (!i.value ()["name"].isString ()) { return false; }
+ if (!i.value ()["min"].isNumber ()) { return false; }
+ if (!i.value ()["max"].isNumber ()) { return false; }
+
+ std::string type = i.value ()["type"].cast<std::string> ();
+ if (type == "input") {
+ if (!i.value ()["default"].isNumber ()) { return false; }
+ _ctrl_params.push_back (std::make_pair (false, i.key ().cast<int> ()));
+ }
+ else if (type == "output") {
+ _ctrl_params.push_back (std::make_pair (true, i.key ().cast<int> ()));
+ } else {
+ return false;
+ }
+ assert (i.key ().cast<int> () == (int) _ctrl_params.size ());
+ }
+ }
+ }
+
+ _control_data = new float[parameter_count ()];
+ _shadow_data = new float[parameter_count ()];
+
+ for (uint32_t i = 0; i < parameter_count (); ++i) {
+ if (parameter_is_input (i)) {
+ _control_data[i] = _shadow_data[i] = default_value (i);
+ }
+ }
+
+ // expose ctrl-ports to global lua namespace
+ luabridge::push <float *> (L, _control_data);
+ lua_setglobal (L, "CtrlPorts");
+
+ return false; // no error
+}
+
+bool
+LuaProc::can_support_io_configuration (const ChanCount& in, ChanCount& out)
+{
+ if (in.n_midi() > 0 && !_has_midi_input) {
+ return false;
+ }
+
+ lua_State* L = lua.getState ();
+ luabridge::LuaRef ioconfig = luabridge::getGlobal (L, "dsp_ioconfig");
+ if (!ioconfig.isFunction ()) {
+ return false;
+ }
+
+ luabridge::LuaRef table = luabridge::getGlobal (L, "table"); //lua std lib
+ luabridge::LuaRef tablesort = table["sort"];
+ assert (tablesort.isFunction ());
+
+ luabridge::LuaRef *_iotable = NULL; // can't use reference :(
+ try {
+ luabridge::LuaRef iotable = ioconfig ();
+ tablesort (iotable);
+ if (iotable.isTable ()) {
+ _iotable = new luabridge::LuaRef (iotable);
+ }
+ } catch (luabridge::LuaException const& e) {
+ return false;
+ }
+
+ if (!_iotable) {
+ return false;
+ }
+
+ // now we can reference it.
+ luabridge::LuaRef iotable (*_iotable);
+ delete _iotable;
+
+ if ((iotable).length () < 1) {
+ return false;
+ }
+
+ int32_t audio_in = in.n_audio ();
+ int32_t audio_out;
+
+ if (in.n_midi() > 0 && audio_in == 0) {
+ audio_out = 2; // prefer stereo version if available.
+ } else {
+ audio_out = audio_in;
+ }
+
+ for (luabridge::Iterator i (iotable); !i.isNil (); ++i) {
+ assert (i.value ().type () == LUA_TTABLE);
+ luabridge::LuaRef io (i.value ());
+
+ int possible_in = io["audio_in"];
+ int possible_out = io["audio_out"];
+
+ // exact match
+ if ((possible_in == audio_in) && (possible_out == audio_out)) {
+ out.set (DataType::MIDI, 0);
+ out.set (DataType::AUDIO, audio_out);
+ return true;
+ }
+ }
+
+ /* now allow potentially "imprecise" matches */
+ audio_out = -1;
+ bool found = false;
+
+ for (luabridge::Iterator i (iotable); !i.isNil (); ++i) {
+ assert (i.value ().type () == LUA_TTABLE);
+ luabridge::LuaRef io (i.value ());
+
+ int possible_in = io["audio_in"];
+ int possible_out = io["audio_out"];
+
+ if (possible_out == 0) {
+ continue;
+ }
+ if (possible_in == 0) {
+ /* no inputs, generators & instruments */
+ if (possible_out == -1) {
+ /* any configuration possible, provide stereo output */
+ audio_out = 2;
+ found = true;
+ } else if (possible_out == -2) {
+ /* invalid, should be (0, -1) */
+ audio_out = 2;
+ found = true;
+ } else if (possible_out < -2) {
+ /* variable number of outputs. -> whatever */
+ audio_out = 2;
+ found = true;
+ } else {
+ /* exact number of outputs */
+ audio_out = possible_out;
+ found = true;
+ }
+ }
+
+ if (possible_in == -1) {
+ /* wildcard for input */
+ if (possible_out == -1) {
+ /* out much match in */
+ audio_out = audio_in;
+ found = true;
+ } else if (possible_out == -2) {
+ /* any configuration possible, pick matching */
+ audio_out = audio_in;
+ found = true;
+ } else if (possible_out < -2) {
+ /* explicitly variable number of outputs, pick maximum */
+ audio_out = -possible_out;
+ found = true;
+ } else {
+ /* exact number of outputs */
+ audio_out = possible_out;
+ found = true;
+ }
+ }
+
+ if (possible_in == -2) {
+
+ if (possible_out == -1) {
+ /* any configuration possible, pick matching */
+ audio_out = audio_in;
+ found = true;
+ } else if (possible_out == -2) {
+ /* invalid. interpret as (-1, -1) */
+ audio_out = audio_in;
+ found = true;
+ } else if (possible_out < -2) {
+ /* explicitly variable number of outputs, pick maximum */
+ audio_out = -possible_out;
+ found = true;
+ } else {
+ /* exact number of outputs */
+ audio_out = possible_out;
+ found = true;
+ }
+ }
+
+ if (possible_in < -2) {
+ /* explicit variable number of inputs */
+ if (audio_in > -possible_in) {
+ /* request is too large */
+ }
+ if (possible_out == -1) {
+ /* any output configuration possible, provide stereo out */
+ audio_out = 2;
+ found = true;
+ } else if (possible_out == -2) {
+ /* invalid. interpret as (<-2, -1) */
+ audio_out = 2;
+ found = true;
+ } else if (possible_out < -2) {
+ /* explicitly variable number of outputs, pick stereo */
+ audio_out = 2;
+ found = true;
+ } else {
+ /* exact number of outputs */
+ audio_out = possible_out;
+ found = true;
+ }
+ }
+
+ if (possible_in && (possible_in == audio_in)) {
+ /* exact number of inputs ... must match obviously */
+ if (possible_out == -1) {
+ /* any output configuration possible, provide stereo output */
+ audio_out = 2;
+ found = true;
+ } else if (possible_out == -2) {
+ /* invalid. interpret as (>0, -1) */
+ audio_out = 2;
+ found = true;
+ } else if (possible_out < -2) {
+ /* explicitly variable number of outputs, pick maximum */
+ audio_out = -possible_out;
+ found = true;
+ } else {
+ /* exact number of outputs */
+ audio_out = possible_out;
+ found = true;
+ }
+ }
+
+ if (found) {
+ break;
+ }
+ }
+
+ if (!found) {
+ return false;
+ }
+
+ out.set (DataType::MIDI, 0);
+ out.set (DataType::AUDIO, audio_out);
+ return true;
+}
+
+bool
+LuaProc::configure_io (ChanCount in, ChanCount out)
+{
+ _configured_in = in;
+ _configured_out = out;
+
+ _configured_in.set (DataType::MIDI, _has_midi_input ? 1 : 0);
+ _configured_out.set (DataType::MIDI, _has_midi_output ? 1 : 0);
+
+ // configure the DSP if needed
+ lua_State* L = lua.getState ();
+ luabridge::LuaRef lua_dsp_configure = luabridge::getGlobal (L, "dsp_configure");
+ if (lua_dsp_configure.type () == LUA_TFUNCTION) {
+ try {
+ lua_dsp_configure (&in, &out);
+ } catch (luabridge::LuaException const& e) {
+ ;
+ }
+ }
+
+ _info->n_inputs = _configured_in;
+ _info->n_outputs = _configured_out;
+ return true;
+}
+
+int
+LuaProc::connect_and_run (BufferSet& bufs,
+ ChanMapping in, ChanMapping out,
+ pframes_t nframes, framecnt_t offset)
+{
+ if (!_lua_dsp) {
+ return 0;
+ }
+
+ Plugin::connect_and_run (bufs, in, out, nframes, offset);
+
+ // This is needed for ARDOUR::Session requests :(
+ if (! SessionEvent::has_per_thread_pool ()) {
+ char name[64];
+ snprintf (name, 64, "Proc-%p", this);
+ pthread_set_name (name);
+ SessionEvent::create_per_thread_pool (name, 64);
+ PBD::notify_event_loops_about_thread_creation (pthread_self(), name, 64);
+ }
+
+ uint32_t const n = parameter_count ();
+ for (uint32_t i = 0; i < n; ++i) {
+ if (parameter_is_control (i) && parameter_is_input (i)) {
+ _control_data[i] = _shadow_data[i];
+ }
+ }
+
+#ifdef WITH_LUAPROC_STATS
+ int64_t t0 = g_get_monotonic_time ();
+#endif
+
+ try {
+ if (_lua_does_channelmapping) {
+ // run the DSP function
+ (*_lua_dsp)(&bufs, in, out, nframes, offset);
+ } else {
+ // map buffers
+ BufferSet& silent_bufs = _session.get_silent_buffers (ChanCount (DataType::AUDIO, 1));
+ BufferSet& scratch_bufs = _session.get_scratch_buffers (ChanCount (DataType::AUDIO, 1));
+
+ lua_State* L = lua.getState ();
+ luabridge::LuaRef in_map (luabridge::newTable (L));
+ luabridge::LuaRef out_map (luabridge::newTable (L));
+
+ const uint32_t audio_in = _configured_in.n_audio ();
+ const uint32_t audio_out = _configured_out.n_audio ();
+ const uint32_t midi_in = _configured_in.n_midi ();
+
+ for (uint32_t ap = 0; ap < audio_in; ++ap) {
+ bool valid;
+ const uint32_t buf_index = in.get(DataType::AUDIO, ap, &valid);
+ if (valid) {
+ in_map[ap + 1] = bufs.get_audio (buf_index).data (offset);
+ } else {
+ in_map[ap + 1] = silent_bufs.get_audio (0).data (offset);
+ }
+ }
+ for (uint32_t ap = 0; ap < audio_out; ++ap) {
+ bool valid;
+ const uint32_t buf_index = out.get(DataType::AUDIO, ap, &valid);
+ if (valid) {
+ out_map[ap + 1] = bufs.get_audio (buf_index).data (offset);
+ } else {
+ out_map[ap + 1] = scratch_bufs.get_audio (0).data (offset);
+ }
+ }
+
+ luabridge::LuaRef lua_midi_tbl (luabridge::newTable (L));
+ int e = 1; // > 1 port, we merge events (unsorted)
+ for (uint32_t mp = 0; mp < midi_in; ++mp) {
+ bool valid;
+ const uint32_t idx = in.get(DataType::MIDI, mp, &valid);
+ if (valid) {
+ for (MidiBuffer::iterator m = bufs.get_midi(idx).begin();
+ m != bufs.get_midi(idx).end(); ++m, ++e) {
+ const Evoral::MIDIEvent<framepos_t> ev(*m, false);
+ luabridge::LuaRef lua_midi_data (luabridge::newTable (L));
+ const uint8_t* data = ev.buffer();
+ for (uint32_t i = 0; i < ev.size(); ++i) {
+ lua_midi_data [i + 1] = data[i];
+ }
+ luabridge::LuaRef lua_midi_event (luabridge::newTable (L));
+ lua_midi_event["time"] = 1 + (*m).time();
+ lua_midi_event["data"] = lua_midi_data;
+ lua_midi_tbl[e] = lua_midi_event;
+ }
+ }
+ }
+
+ if (_has_midi_input) {
+ // XXX TODO This needs a better solution than global namespace
+ luabridge::push (L, lua_midi_tbl);
+ lua_setglobal (L, "mididata");
+ }
+
+
+ // run the DSP function
+ (*_lua_dsp)(in_map, out_map, nframes);
+ }
+ } catch (luabridge::LuaException const& e) {
+#ifndef NDEBUG
+ printf ("LuaException: %s\n", e.what ());
+#endif
+ return -1;
+ }
+#ifdef WITH_LUAPROC_STATS
+ int64_t t1 = g_get_monotonic_time ();
+#endif
+ lua.collect_garbage (); // rt-safe, slight *regular* performance overhead
+#ifdef WITH_LUAPROC_STATS
+ ++_stats_cnt;
+ int64_t t2 = g_get_monotonic_time ();
+ int64_t ela0 = t1 - t0;
+ int64_t ela1 = t2 - t1;
+ if (ela0 > _stats_max[0]) _stats_max[0] = ela0;
+ if (ela1 > _stats_max[1]) _stats_max[1] = ela1;
+ _stats_avg[0] += ela0;
+ _stats_avg[1] += ela1;
+#endif
+ return 0;
+}
+
+
+void
+LuaProc::add_state (XMLNode* root) const
+{
+ gchar* b64 = g_base64_encode ((const guchar*)_script.c_str (), _script.size ());
+ std::string b64s (b64);
+ g_free (b64);
+ XMLNode* script_node = new XMLNode (X_("script"));
+ script_node->add_property (X_("lua"), LUA_VERSION);
+ script_node->add_content (b64s);
+ root->add_child_nocopy (*script_node);
+}
+
+int
+LuaProc::set_script_from_state (const XMLNode& node)
+{
+ XMLNode* child;
+ if (node.name () != state_node_name ()) {
+ return -1;
+ }
+
+ if ((child = node.child (X_("script"))) != 0) {
+ for (XMLNodeList::const_iterator n = child->children ().begin (); n != child->children ().end (); ++n) {
+ if (!(*n)->is_content ()) { continue; }
+ gsize size;
+ guchar* buf = g_base64_decode ((*n)->content ().c_str (), &size);
+ _script = std::string ((const char*)buf, size);
+ g_free (buf);
+ if (load_script ()) {
+ PBD::error << _("Failed to load Lua script from session state.") << endmsg;
+#ifndef NDEBUG
+ std::cerr << "Failed Lua Script: " << _script << std::endl;
+#endif
+ _script = "";
+ }
+ break;
+ }
+ }
+ if (_script.empty ()) {
+ PBD::error << _("Session State for LuaProcessor did not include a Lua script.") << endmsg;
+ return -1;
+ }
+ if (!_lua_dsp) {
+ PBD::error << _("Invalid/incompatible Lua script found for LuaProcessor.") << endmsg;
+ return -1;
+ }
+ return 0;
+}
+
+int
+LuaProc::set_state (const XMLNode& node, int version)
+{
+ if (_script.empty ()) {
+ if (set_script_from_state (node)) {
+ return -1;
+ }
+ }
+ return Plugin::set_state (node, version);
+}
+
+uint32_t
+LuaProc::parameter_count () const
+{
+ return _ctrl_params.size ();
+}
+
+float
+LuaProc::default_value (uint32_t port)
+{
+ if (_ctrl_params[port].first) {
+ assert (0);
+ return 0;
+ }
+ int lp = _ctrl_params[port].second;
+ luabridge::LuaRef lr = (*_lua_params)[lp];
+ return (lr["default"]).cast<float> ();
+}
+
+void
+LuaProc::set_parameter (uint32_t port, float val)
+{
+ assert (port < parameter_count ());
+ if (get_parameter (port) == val) {
+ return;
+ }
+ _shadow_data[port] = val;
+ Plugin::set_parameter (port, val);
+}
+
+float
+LuaProc::get_parameter (uint32_t port) const
+{
+ if (parameter_is_input (port)) {
+ return _shadow_data[port];
+ } else {
+ return _control_data[port];
+ }
+}
+
+int
+LuaProc::get_parameter_descriptor (uint32_t port, ParameterDescriptor& desc) const
+{
+ assert (port <= parameter_count ());
+ int lp = _ctrl_params[port].second;
+
+ luabridge::LuaRef lr = (*_lua_params)[lp];
+ desc.lower = (lr["min"]).cast<float> ();
+ desc.upper = (lr["max"]).cast<float> ();
+
+ if (_ctrl_params[port].first) {
+ desc.normal = desc.lower; // output-port, no default
+ } else {
+ desc.normal = (lr["default"]).cast<float> ();
+ }
+
+ desc.toggled = lr["toggled"].isBoolean () && (lr["toggled"]).cast<bool> ();
+ desc.logarithmic = lr["logarithmic"].isBoolean () && (lr["logarithmic"]).cast<bool> ();
+ desc.integer_step = lr["integer"].isBoolean () && (lr["integer"]).cast<bool> ();
+ desc.sr_dependent = lr["ratemult"].isBoolean () && (lr["ratemult"]).cast<bool> ();
+ desc.enumeration = lr["enum"].isBoolean () && (lr["enum"]).cast<bool> ();
+
+ // TODO check if assignments make sense, e.g
+ assert (!(desc.toggled && desc.logarithmic));
+
+ if (lr["unit"].isString ()) {
+ std::string unit = lr["unit"].cast<std::string> ();
+ if (unit == "dB") { desc.unit = ParameterDescriptor::DB; }
+ else if (unit == "Hz") { desc.unit = ParameterDescriptor::HZ; }
+ else if (unit == "Midi Note") { desc.unit = ParameterDescriptor::MIDI_NOTE; }
+ }
+
+ desc.label = (lr["name"]).cast<std::string> ();
+ desc.scale_points = get_scale_points (port);
+ desc.update_steps ();
+ return 0;
+}
+
+std::string
+LuaProc::get_parameter_docs (uint32_t port) const {
+ assert (port <= parameter_count ());
+ int lp = _ctrl_params[port].second;
+ luabridge::LuaRef lr = (*_lua_params)[lp];
+ luabridge::LuaRef doc = lr["doc"];
+ if (doc.isString ()) {
+ return doc.cast<std::string> ();
+ }
+ return "";
+}
+
+uint32_t
+LuaProc::nth_parameter (uint32_t port, bool& ok) const
+{
+ if (port < _ctrl_params.size ()) {
+ ok = true;
+ return port;
+ }
+ ok = false;
+ return 0;
+}
+
+bool
+LuaProc::parameter_is_input (uint32_t port) const
+{
+ assert (port < _ctrl_params.size ());
+ return (!_ctrl_params[port].first);
+}
+
+bool
+LuaProc::parameter_is_output (uint32_t port) const
+{
+ assert (port < _ctrl_params.size ());
+ return (_ctrl_params[port].first);
+}
+
+std::set<Evoral::Parameter>
+LuaProc::automatable () const
+{
+ std::set<Evoral::Parameter> automatables;
+ for (uint32_t i = 0; i < _ctrl_params.size (); ++i) {
+ if (parameter_is_input (i)) {
+ automatables.insert (automatables.end (), Evoral::Parameter (PluginAutomation, 0, i));
+ }
+ }
+ return automatables;
+}
+
+std::string
+LuaProc::describe_parameter (Evoral::Parameter param)
+{
+ if (param.type () == PluginAutomation && param.id () < parameter_count ()) {
+ int lp = _ctrl_params[param.id ()].second;
+ luabridge::LuaRef lr = (*_lua_params)[lp];
+ return (lr["name"]).cast<std::string> ();
+ } else {
+ return "??";
+ }
+}
+
+void
+LuaProc::print_parameter (uint32_t param, char* buf, uint32_t len) const
+{
+ if (buf && len) {
+ if (param < parameter_count ()) {
+ snprintf (buf, len, "%.3f", get_parameter (param));
+ } else {
+ strcat (buf, "0");
+ }
+ }
+}
+
+boost::shared_ptr<ScalePoints>
+LuaProc::get_scale_points (uint32_t port) const
+{
+ int lp = _ctrl_params[port].second;
+ luabridge::LuaRef lr = (*_lua_params)[lp];
+
+ if (!lr["scalepoints"].isTable()) {
+ return boost::shared_ptr<ScalePoints> ();
+ }
+
+ int cnt = 0;
+ boost::shared_ptr<ScalePoints> rv = boost::shared_ptr<ScalePoints>(new ScalePoints());
+ luabridge::LuaRef scalepoints (lr["scalepoints"]);
+
+ for (luabridge::Iterator i (scalepoints); !i.isNil (); ++i) {
+ if (!i.key ().isString ()) { continue; }
+ if (!i.value ().isNumber ()) { continue; }
+ rv->insert(make_pair(i.key ().cast<std::string> (),
+ i.value ().cast<float> ()));
+ ++cnt;
+ }
+
+ if (rv->size() > 0) {
+ return rv;
+ }
+ return boost::shared_ptr<ScalePoints> ();
+}
+
+
+////////////////////////////////////////////////////////////////////////////////
+#include <glibmm/miscutils.h>
+#include <glibmm/fileutils.h>
+
+LuaPluginInfo::LuaPluginInfo (LuaScriptInfoPtr lsi) {
+ if (lsi->type != LuaScriptInfo::DSP) {
+ throw failed_constructor ();
+ }
+
+ path = lsi->path;
+ name = lsi->name;
+ creator = lsi->author;
+ category = lsi->category;
+ unique_id = "luascript"; // the interpreter is not unique.
+
+ n_inputs.set (DataType::AUDIO, 1);
+ n_outputs.set (DataType::AUDIO, 1);
+ type = Lua;
+}
+
+PluginPtr
+LuaPluginInfo::load (Session& session)
+{
+ std::string script = "";
+ if (!Glib::file_test (path, Glib::FILE_TEST_EXISTS)) {
+ return PluginPtr ();
+ }
+
+ try {
+ script = Glib::file_get_contents (path);
+ } catch (Glib::FileError err) {
+ return PluginPtr ();
+ }
+
+ if (script.empty ()) {
+ return PluginPtr ();
+ }
+
+ try {
+ PluginPtr plugin (new LuaProc (session.engine (), session, script));
+ return plugin;
+ } catch (failed_constructor& err) {
+ ;
+ }
+ return PluginPtr ();
+}
+
+std::vector<Plugin::PresetRecord>
+LuaPluginInfo::get_presets (bool /*user_only*/) const
+{
+ std::vector<Plugin::PresetRecord> p;
+ return p;
+}
projects / ardour.git / commitdiff