LV2Effect::LV2Effect(const LilvPlugin *data,
const std::set<wxString> & categories)
: mValid(true),
mCategories(categories),
mMidiInput(0),
mLatencyPortIndex(-1)
{
// We don't support any features at all, so if the plugin requires
// any we skip it.
LilvNodes *req = lilv_plugin_get_required_features(data);
size_t nFeatures = lilv_nodes_size(req);
lilv_nodes_free(req);
if (nFeatures > 0)
{
mValid = false;
return;
}
mData = data;
pluginName = GetString(lilv_plugin_get_name(mData), true);
fInBuffer = NULL;
fOutBuffer = NULL;
mLength = 0;
// Allocate buffers for the port indices and the default control values
int numPorts = lilv_plugin_get_num_ports(mData);
float *minimumValues = new float [numPorts];
float *maximumValues = new float [numPorts];
float *defaultValues = new float [numPorts];
// Retrieve the port ranges for all ports (some values may be NaN)
lilv_plugin_get_port_ranges_float(mData, minimumValues,
maximumValues, defaultValues);
// Get info about all ports
for (int i = 0; i < numPorts; i++)
{
const LilvPort *port = lilv_plugin_get_port_by_index(mData, i);
LV2Port internalPort;
internalPort.mIndex = lilv_port_get_index(mData, port);
// Get the port name
LilvNode *tmpName = lilv_port_get_name(mData, port);
internalPort.mName = GetString(tmpName);
lilv_node_free(tmpName);
// Get the scale points
LilvScalePoints* points = lilv_port_get_scale_points(mData, port);
LILV_FOREACH(scale_points, j, points)
{
const LilvScalePoint *point = lilv_scale_points_get(points, j);
internalPort.mScaleValues.Add(lilv_node_as_float(lilv_scale_point_get_value(point)));
internalPort.mScaleLabels.Add(GetString(lilv_scale_point_get_label(point)));
}
lilv_scale_points_free(points);
// Get the groups
LilvNodes *groups = lilv_port_get_value(mData, port, gPortGroup);
if (groups)
{
LilvNode *group = lilv_nodes_get_first(groups);
wxString uri = GetString(group);
wxString label;
const LilvNode *name = lilv_world_get(gWorld, group, gName, NULL);
if (name)
{
label = GetString(name);
}
else
{
// Shouldn't happen, but provide something
label = uri;
}
lilv_nodes_free(groups);
// Check for new group
if (mPortGroups.find(uri) == mPortGroups.end())
{
mPortGroups[uri] = LV2PortGroup(label);
}
#if 0
// Get subgroup
//
// LLL: This isn't right...must find or construct a plugin with
// subgroups.
LilvNodes *subgroup = lilv_node_get_value(mData, port, gSubGroupOf);
if (subgroups)
{
LilvNode *subgroup = lilv_nodes_get_first(subgroups);
wxString uri = GetString(subgroup);
const LilvNode *subgroup = lilv_world_get(gWorld, group, gSubGroupOf, NULL);
wxString label = GetString(name);
lilv_nodes_free(subgroup);
}
else
#endif
{
mRootGroup.AddSubGroup(mPortGroups[uri]);
}
mPortGroups[uri].AddParameter(i);
}
else
{
mRootGroup.AddParameter(i);
}
// Get the port type
if (lilv_port_is_a(mData, port, gAudioPortClass))
{
if (lilv_port_is_a(mData, port, gInputPortClass))
{
mAudioInputs.Add(internalPort);
}
else if (lilv_port_is_a(mData, port, gOutputPortClass))
{
mAudioOutputs.Add(internalPort);
}
}
else if (lilv_port_is_a(mData, port, gControlPortClass) &&
lilv_port_is_a(mData, port, gInputPortClass))
{
internalPort.mControlBuffer = float(1.0);
internalPort.mMin = minimumValues[i];
internalPort.mMax = maximumValues[i];
internalPort.mDefault = defaultValues[i];
if (isfinite(defaultValues[i]))
{
internalPort.mControlBuffer = defaultValues[i];
}
else if (isfinite(minimumValues[i]))
{
internalPort.mControlBuffer = minimumValues[i];
}
else if (isfinite(maximumValues[i]))
{
internalPort.mControlBuffer = maximumValues[i];
}
if (lilv_port_has_property(mData, port, gPortToggled))
{
internalPort.mToggle = true;
}
else if (lilv_port_has_property(mData, port, gPortIsInteger))
{
internalPort.mInteger = true;
}
else if (lilv_port_has_property(mData, port, gPortIsSampleRate))
{
internalPort.mSampleRate = true;
}
else if (lilv_port_has_property(mData, port, gPortIsEnumeration))
{
internalPort.mEnumeration = true;
}
mControlInputs.Add(internalPort);
}
else if (lilv_port_is_a(mData, port, gControlPortClass) &&
lilv_port_is_a(mData, port, gOutputPortClass))
{
// If there is more than one latency port, the plugin is invalid
if (lilv_port_has_property(mData, port, gPortIsLatency))
{
if (mLatencyPortIndex >= 0)
{
mValid = false;
continue;
}
mLatencyPortIndex = i;
}
else if (!lilv_port_has_property(mData, port, gPortIsOptional))
{
mControlOutputs.Add(internalPort);
}
}
else if (lilv_port_is_a(mData, port, gMidiPortClass) &&
lilv_port_is_a(mData, port, gInputPortClass))
{
// If there is more than one MIDI input port, the plugin is invalid
if (mMidiInput)
{
mValid = false;
continue;
}
mMidiInput = new LV2Port(internalPort);
}
else
{
// Unknown port type, we set the invalid flag
// mValid = false;
}
}
delete [] minimumValues;
delete [] maximumValues;
delete [] defaultValues;
// MIDI synths may not have any audio inputs.
if (mMidiInput && mAudioInputs.GetCount() > 0)
{
mValid = false;
}
// Determine whether the plugin is a generator, effect or analyser
// depending on the number of ports of each type (not completely accurate,
// but works most of the time)
int flags = PLUGIN_EFFECT;
if (mAudioInputs.GetCount() == 0)
{
flags |= INSERT_EFFECT;
}
else if (mAudioOutputs.GetCount() == 0)
{
flags |= ANALYZE_EFFECT;
}
else
{
flags |= PROCESS_EFFECT;
}
SetEffectFlags(flags);
}
Lv2Plugin *Lv2PluginCache::getPlugin(const char *uri, const char *preset, Lv2State *state) {
// create a unique key for uri/preset/state
std::string keyString(uri);
if(preset) {
keyString.append(":");
keyString.append(preset);
}
std::size_t hash = std::hash<std::string>()(keyString);
if(state) {
hash = hash ^ (state->getHash() << 1);
}
// count tells how many instances of this type of plugin
int count = ++instanceCount[hash];
// return cached plugin instance if available
int key = hash + count;
Lv2Plugin *cachedPlugin = findObject(key);
if(cachedPlugin) {
cachedPlugin->restore();
return cachedPlugin;
}
// look in cache for plugin type by uri
std::string uriString(uri);
const LilvPlugin *lilvPlugin = pluginMap[uriString];
if(!lilvPlugin) {
// find lv2 plugin in lilv
LilvNode *lilvUri = lilv_new_uri(world, uri);
lilvPlugin = lilv_plugins_get_by_uri(plugins, lilvUri);
lilv_node_free(lilvUri);
if(!lilvPlugin) {
throw std::logic_error(std::string("Plugin is not installed on this system: ") + uriString);
}
// check that required features are supported
LilvNodes* features = lilv_plugin_get_required_features(lilvPlugin);
for (LilvIter* f = lilv_nodes_begin(features); !lilv_nodes_is_end(features, f); f = lilv_nodes_next(features, f)) {
const char* featureUri = lilv_node_as_uri(lilv_nodes_get(features, f));
if(!supported[featureUri]) {
throw std::logic_error(std::string("Plugin ") + uriString + " requires unsupported feature: " + featureUri);
}
}
lilv_nodes_free(features);
pluginMap[uriString] = lilvPlugin;
}
// create worker if required
Lv2Worker *worker = 0;
if (lilv_plugin_has_feature(lilvPlugin, lv2Constants.lv2WorkerSchedule)
&& lilv_plugin_has_extension_data(lilvPlugin, lv2Constants.lv2WorkerInterface)) {
worker = new Lv2Worker();
((LV2_Worker_Schedule*)lv2Features[5]->data)->handle = worker;
}
// instantiate
LilvInstance *instance = lilv_plugin_instantiate(lilvPlugin, sampleRate, lv2Features);
// connect worker with plugin instance
if(worker) {
worker->setInstance(instance);
}
// create plugin object
Lv2Plugin *plugin = new Lv2Plugin(lilvPlugin, instance, lv2Constants, worker);
// restore baseline default state
LilvState *defaultState = lilv_state_new_from_world(world, &map, lilv_plugin_get_uri(lilvPlugin));
lilv_state_restore(defaultState, instance, setPortValue, plugin, 0, lv2Features);
// find and restore preset
if(preset) {
LilvNodes* presets = lilv_plugin_get_related(lilvPlugin, lv2Constants.lv2Presets);
LilvNode *myPreset = 0;
LILV_FOREACH(nodes, i, presets) {
const LilvNode* presetNode = lilv_nodes_get(presets, i);
lilv_world_load_resource(world, presetNode);
LilvNodes* labels = lilv_world_find_nodes(world, presetNode, lv2Constants.lv2RdfsLabel, NULL);
if (labels) {
const LilvNode* label = lilv_nodes_get_first(labels);
const char *labelString = lilv_node_as_string(label); // TODO: free?
if(!strcmp(labelString, preset)) {
myPreset = lilv_node_duplicate(presetNode);
}
lilv_nodes_free(labels);
}
}
lilv_nodes_free(presets);
if(myPreset) {
LilvState* presetState = lilv_state_new_from_world(world, &map, myPreset);
lilv_state_restore(presetState, instance, setPortValue, plugin, 0, NULL);
// lilv_state_free(state); // TODO
}
else {
throw std::logic_error(std::string("Plugin ") + uriString + " has no such preset: " + preset);
}
}
// restore state
else if(state) { // TODO: what if state is requested on a plugin that doesn't support?
