diff options
author | David Robillard <d@drobilla.net> | 2008-01-15 18:49:34 +0000 |
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committer | David Robillard <d@drobilla.net> | 2008-01-15 18:49:34 +0000 |
commit | 123399c2a8141458b21b0079ac17aa9ede16e763 (patch) | |
tree | ce1b77ca58ba24f858efe59714d9ca1c3addaeff /libs/ardour/lv2_plugin.cc | |
parent | 69b94c201d39c6a64fa6f1e9412578d482d0ce5b (diff) |
LV2 support.
git-svn-id: svn://localhost/ardour2/branches/2.0-ongoing@2922 d708f5d6-7413-0410-9779-e7cbd77b26cf
Diffstat (limited to 'libs/ardour/lv2_plugin.cc')
-rw-r--r-- | libs/ardour/lv2_plugin.cc | 539 |
1 files changed, 539 insertions, 0 deletions
diff --git a/libs/ardour/lv2_plugin.cc b/libs/ardour/lv2_plugin.cc new file mode 100644 index 0000000000..fbaa7f6f3b --- /dev/null +++ b/libs/ardour/lv2_plugin.cc @@ -0,0 +1,539 @@ +/* + Copyright (C) 2008 Paul Davis + Author: Dave Robillard + + 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 <vector> +#include <string> + +#include <cstdlib> +#include <cmath> + +#include <pbd/compose.h> +#include <pbd/error.h> +#include <pbd/pathscanner.h> +#include <pbd/xml++.h> + +#include <ardour/ardour.h> +#include <ardour/session.h> +#include <ardour/audioengine.h> +#include <ardour/lv2_plugin.h> + +#include <pbd/stl_delete.h> + +#include "i18n.h" +#include <locale.h> + +using namespace std; +using namespace ARDOUR; +using namespace PBD; + +LV2Plugin::LV2Plugin (AudioEngine& e, Session& session, SLV2Plugin plugin, nframes_t rate) + : Plugin (e, session) +{ + init (plugin, rate); +} + +LV2Plugin::LV2Plugin (const LV2Plugin &other) + : Plugin (other) +{ + init (other._plugin, other._sample_rate); + + for (uint32_t i = 0; i < parameter_count(); ++i) { + _control_data[i] = other._shadow_data[i]; + _shadow_data[i] = other._shadow_data[i]; + } +} + +void +LV2Plugin::init (SLV2Plugin plugin, nframes_t rate) +{ + _plugin = plugin; + _template = slv2_plugin_get_template(plugin); + _control_data = 0; + _shadow_data = 0; + _latency_control_port = 0; + _was_activated = false; + + _instance = slv2_plugin_instantiate(plugin, rate, NULL); + + if (_instance == 0) { + error << _("LV2: Failed to instantiate plugin ") << slv2_plugin_get_uri(plugin) << endl; + throw failed_constructor(); + } + + if (slv2_plugin_has_feature(plugin, "http://lv2plug.in/ns/lv2core#inPlaceBroken")) { + error << string_compose(_("LV2: \"%1\" cannot be used, since it cannot do inplace processing"), slv2_plugin_get_name(plugin)) << endmsg; + throw failed_constructor(); + } + + _sample_rate = rate; + + const uint32_t num_ports = slv2_plugin_get_num_ports(plugin); + + _control_data = new float[num_ports]; + _shadow_data = new float[num_ports]; + + const bool latent = slv2_plugin_has_latency(plugin); + uint32_t latency_port = (latent ? slv2_plugin_get_latency_port(plugin) : 0); + + for (uint32_t i = 0; i < num_ports; ++i) { + if (parameter_is_control(i)) { + slv2_instance_connect_port (_instance, i, &_control_data[i]); + + if (latent && i == latency_port) { + _latency_control_port = &_control_data[i]; + *_latency_control_port = 0; + } + + if (parameter_is_input(i)) { + _shadow_data[i] = default_value (i); + } + } + } + + Plugin::setup_controls (); + + latency_compute_run (); +} + +LV2Plugin::~LV2Plugin () +{ + deactivate (); + cleanup (); + + GoingAway (); /* EMIT SIGNAL */ + + slv2_instance_free(_instance); + + if (_control_data) { + delete [] _control_data; + } + + if (_shadow_data) { + delete [] _shadow_data; + } +} + +string +LV2Plugin::unique_id() const +{ + return slv2_plugin_get_uri(_plugin); +} + + +float +LV2Plugin::default_value (uint32_t port) +{ + return slv2_port_get_default_value(_plugin, + slv2_plugin_get_port_by_index(_plugin, port)); +} + +void +LV2Plugin::set_parameter (uint32_t which, float val) +{ + if (which < slv2_plugin_get_num_ports(_plugin)) { + _shadow_data[which] = val; + ParameterChanged (which, val); /* EMIT SIGNAL */ + + if (which < parameter_count() && controls[which]) { + controls[which]->Changed (); + } + + } else { + warning << string_compose (_("Illegal parameter number used with plugin \"%1\"." + "This is a bug in either Ardour or the LV2 plugin (%2)"), + name(), unique_id()) << endmsg; + } +} + +float +LV2Plugin::get_parameter (uint32_t which) const +{ + if (parameter_is_input(which)) { + return (float) _shadow_data[which]; + } else { + return (float) _control_data[which]; + } + return 0.0f; +} + +uint32_t +LV2Plugin::nth_parameter (uint32_t n, bool& ok) const +{ + uint32_t x, c; + + ok = false; + + for (c = 0, x = 0; x < slv2_plugin_get_num_ports(_plugin); ++x) { + if (parameter_is_control (x)) { + if (c++ == n) { + ok = true; + return x; + } + } + } + + return 0; +} + +XMLNode& +LV2Plugin::get_state() +{ + XMLNode *root = new XMLNode(state_node_name()); + XMLNode *child; + char buf[16]; + LocaleGuard lg (X_("POSIX")); + + for (uint32_t i = 0; i < parameter_count(); ++i){ + + if (parameter_is_input(i) && parameter_is_control(i)) { + child = new XMLNode("port"); + snprintf(buf, sizeof(buf), "%u", i); + child->add_property("number", string(buf)); + snprintf(buf, sizeof(buf), "%+f", _shadow_data[i]); + child->add_property("value", string(buf)); + root->add_child_nocopy (*child); + + if (i < controls.size() && controls[i]) { + root->add_child_nocopy (controls[i]->get_state()); + } + } + } + + return *root; +} + +bool +LV2Plugin::save_preset (string name) +{ + return Plugin::save_preset (name, "lv2"); +} + +int +LV2Plugin::set_state(const XMLNode& node) +{ + XMLNodeList nodes; + XMLProperty *prop; + XMLNodeConstIterator iter; + XMLNode *child; + const char *port; + const char *data; + uint32_t port_id; + LocaleGuard lg (X_("POSIX")); + + if (node.name() != state_node_name()) { + error << _("Bad node sent to LV2Plugin::set_state") << endmsg; + return -1; + } + + nodes = node.children ("port"); + + for(iter = nodes.begin(); iter != nodes.end(); ++iter){ + + child = *iter; + + if ((prop = child->property("number")) != 0) { + port = prop->value().c_str(); + } else { + warning << _("LV2: no lv2 port number") << endmsg; + continue; + } + + if ((prop = child->property("value")) != 0) { + data = prop->value().c_str(); + } else { + warning << _("LV2: no lv2 port data") << endmsg; + continue; + } + + sscanf (port, "%" PRIu32, &port_id); + set_parameter (port_id, atof(data)); + } + + latency_compute_run (); + + return 0; +} + +int +LV2Plugin::get_parameter_descriptor (uint32_t which, ParameterDescriptor& desc) const +{ + SLV2Port port = slv2_plugin_get_port_by_index(_plugin, which); + + #define LV2_URI "http://lv2plug.in/ns/lv2core#" + + desc.integer_step = slv2_port_has_property(_plugin, port, LV2_URI "integer"); + desc.toggled = slv2_port_has_property(_plugin, port, LV2_URI "toggled"); + desc.logarithmic = false; // TODO (LV2 extension) + desc.sr_dependent = slv2_port_has_property(_plugin, port, LV2_URI "sampleRate"); + desc.label = slv2_port_get_name(_plugin, port); + desc.lower = slv2_port_get_minimum_value(_plugin, port); + desc.upper = slv2_port_get_maximum_value(_plugin, port); + desc.min_unbound = false; // TODO (LV2 extension) + desc.max_unbound = false; // TODO (LV2 extension) + + if (desc.integer_step) { + desc.step = 1.0; + desc.smallstep = 0.1; + desc.largestep = 10.0; + } else { + const float delta = desc.upper - desc.lower; + desc.step = delta / 1000.0f; + desc.smallstep = delta / 10000.0f; + desc.largestep = delta/10.0f; + } + + return 0; +} + + +string +LV2Plugin::describe_parameter (uint32_t which) +{ + if (which < parameter_count()) { + return slv2_port_get_name(_plugin, + slv2_plugin_get_port_by_index(_plugin, which)); + } else { + return "??"; + } +} + +nframes_t +LV2Plugin::latency () const +{ + if (_latency_control_port) { + return (nframes_t) floor (*_latency_control_port); + } else { + return 0; + } +} + +set<uint32_t> +LV2Plugin::automatable () const +{ + set<uint32_t> ret; + + for (uint32_t i = 0; i < parameter_count(); ++i){ + if (parameter_is_input(i) && parameter_is_control(i)) { + ret.insert (ret.end(), i); + } + } + + return ret; +} + +int +LV2Plugin::connect_and_run (vector<Sample*>& bufs, uint32_t nbufs, int32_t& in_index, int32_t& out_index, nframes_t nframes, nframes_t offset) +{ + uint32_t port_index; + cycles_t then, now; + + port_index = 0; + + then = get_cycles (); + + while (port_index < parameter_count()) { + if (parameter_is_audio(port_index)) { + if (parameter_is_input(port_index)) { + slv2_instance_connect_port(_instance, port_index, + bufs[min((uint32_t)in_index, nbufs - 1)] + offset); + in_index++; + } else if (parameter_is_output(port_index)) { + slv2_instance_connect_port(_instance, port_index, + bufs[min((uint32_t)out_index, nbufs - 1)] + offset); + out_index++; + } + } + port_index++; + } + + run (nframes); + now = get_cycles (); + set_cycles ((uint32_t) (now - then)); + + return 0; +} + +bool +LV2Plugin::parameter_is_control (uint32_t param) const +{ + SLV2PortSignature sig = slv2_template_get_port(_template, param); + return (slv2_port_signature_get_type(sig) == SLV2_PORT_DATA_TYPE_CONTROL); +} + +bool +LV2Plugin::parameter_is_audio (uint32_t param) const +{ + SLV2PortSignature sig = slv2_template_get_port(_template, param); + return (slv2_port_signature_get_type(sig) == SLV2_PORT_DATA_TYPE_AUDIO); +} + +bool +LV2Plugin::parameter_is_output (uint32_t param) const +{ + SLV2PortSignature sig = slv2_template_get_port(_template, param); + return (slv2_port_signature_get_direction(sig) == SLV2_PORT_DIRECTION_OUTPUT); +} + +bool +LV2Plugin::parameter_is_input (uint32_t param) const +{ + SLV2PortSignature sig = slv2_template_get_port(_template, param); + return (slv2_port_signature_get_direction(sig) == SLV2_PORT_DIRECTION_INPUT); +} + +void +LV2Plugin::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"); + } + } +} + +void +LV2Plugin::run (nframes_t nframes) +{ + for (uint32_t i = 0; i < parameter_count(); ++i) { + SLV2PortSignature sig = slv2_template_get_port(_template, i); + if (slv2_port_signature_get_type(sig) == SLV2_PORT_DATA_TYPE_CONTROL + && slv2_port_signature_get_direction(sig) == SLV2_PORT_DIRECTION_INPUT) { + _control_data[i] = _shadow_data[i]; + } + } + + slv2_instance_run(_instance, nframes); +} + +void +LV2Plugin::latency_compute_run () +{ + if (!_latency_control_port) { + return; + } + + /* we need to run the plugin so that it can set its latency + parameter. + */ + + activate (); + + uint32_t port_index = 0; + uint32_t in_index = 0; + uint32_t out_index = 0; + const nframes_t bufsize = 1024; + float buffer[bufsize]; + + memset(buffer,0,sizeof(float)*bufsize); + + /* Note that we've already required that plugins + be able to handle in-place processing. + */ + + port_index = 0; + + while (port_index < parameter_count()) { + if (parameter_is_audio (port_index)) { + if (parameter_is_input (port_index)) { + slv2_instance_connect_port (_instance, port_index, buffer); + in_index++; + } else if (parameter_is_output (port_index)) { + slv2_instance_connect_port (_instance, port_index, buffer); + out_index++; + } + } + port_index++; + } + + run (bufsize); + deactivate (); +} + +LV2PluginInfo::LV2PluginInfo (void* slv2_plugin) + : _slv2_plugin(slv2_plugin) +{ +} + +LV2PluginInfo::~LV2PluginInfo() +{ +} + +PluginPtr +LV2PluginInfo::load (Session& session) +{ + SLV2Plugin p = (SLV2Plugin)_slv2_plugin; + + try { + PluginPtr plugin; + + plugin.reset (new LV2Plugin (session.engine(), session, p, session.frame_rate())); + + plugin->set_info(PluginInfoPtr(new LV2PluginInfo(*this))); + return plugin; + } + + catch (failed_constructor &err) { + return PluginPtr ((Plugin*) 0); + } + + return PluginPtr(); +} + +PluginInfoList +LV2PluginInfo::discover (void* slv2_world) +{ + PluginInfoList plugs; + + SLV2Plugins plugins = slv2_world_get_all_plugins((SLV2World)slv2_world); + + for (unsigned i=0; i < slv2_plugins_size(plugins); ++i) { + SLV2Plugin p = slv2_plugins_get_at(plugins, i); + LV2PluginInfoPtr info (new LV2PluginInfo(p)); + + info->name = slv2_plugin_get_name(p); + + SLV2PluginClass pclass = slv2_plugin_get_class(p); + info->category = slv2_plugin_class_get_label(pclass); + + char* author_name = slv2_plugin_get_author_name(p); + info->creator = author_name ? string(author_name) : "Unknown"; + free(author_name); + + info->path = "/NOPATH"; // Meaningless for LV2 + + SLV2Template io = slv2_plugin_get_template(p); + + info->n_inputs = slv2_template_get_num_ports_of_type(io, + SLV2_PORT_DIRECTION_INPUT, SLV2_PORT_DATA_TYPE_AUDIO); + + info->n_outputs = slv2_template_get_num_ports_of_type(io, + SLV2_PORT_DIRECTION_OUTPUT, SLV2_PORT_DATA_TYPE_AUDIO); + + info->unique_id = slv2_plugin_get_uri(p); + info->index = 0; // Meaningless for LV2 + + plugs.push_back (info); + } + + return plugs; +} + |