static GParamSpec *
gst_lv2_class_get_param_spec (GstLV2Class * klass, gint portnum)
{
SLV2Plugin lv2plugin = klass->plugin;
SLV2Port port = slv2_plugin_get_port_by_index (lv2plugin, portnum);
SLV2Value lv2def, lv2min, lv2max;
GParamSpec *ret;
gchar *name;
gint perms;
gfloat lower = 0.0f, upper = 1.0f, def = 0.0f;
name = gst_lv2_class_get_param_name (klass, portnum);
perms = G_PARAM_READABLE;
if (slv2_port_is_a (lv2plugin, port, input_class))
perms |= G_PARAM_WRITABLE | G_PARAM_CONSTRUCT;
if (slv2_port_is_a (lv2plugin, port, control_class))
perms |= GST_PARAM_CONTROLLABLE;
if (slv2_port_has_property (lv2plugin, port, toggled_prop)) {
ret = g_param_spec_boolean (name, name, name, FALSE, perms);
g_free (name);
return ret;
}
slv2_port_get_range (lv2plugin, port, &lv2def, &lv2min, &lv2max);
if (lv2def)
def = slv2_value_as_float (lv2def);
if (lv2min)
lower = slv2_value_as_float (lv2min);
if (lv2max)
upper = slv2_value_as_float (lv2max);
if (def < lower) {
GST_WARNING ("%s has lower bound %f > default %f\n",
slv2_value_as_string (slv2_plugin_get_uri (lv2plugin)), lower, def);
lower = def;
}
if (def > upper) {
GST_WARNING ("%s has upper bound %f < default %f\n",
slv2_value_as_string (slv2_plugin_get_uri (lv2plugin)), upper, def);
upper = def;
}
if (slv2_port_has_property (lv2plugin, port, integer_prop))
ret = g_param_spec_int (name, name, name, lower, upper, def, perms);
else
ret = g_param_spec_float (name, name, name, lower, upper, def, perms);
g_free (name);
return ret;
}
LV2Effect::LV2Effect(SLV2Plugin data,
const std::set<wxString>& categories)
: mValid(true),
mCategories(categories),
mMidiInput(0),
mScalePointsRetrieved(false),
mPortGroupsRetrieved(false) {
// We don't support any features at all, so if the plugin requires
// any we skip it.
SLV2Values req = slv2_plugin_get_required_features(data);
size_t nFeatures = slv2_values_size(req);
slv2_values_free(req);
if (nFeatures > 0) {
mValid = false;
return;
}
mData = data;
pluginName =
wxString::FromUTF8(slv2_value_as_string(slv2_plugin_get_name(mData)));
fInBuffer = NULL;
fOutBuffer = NULL;
mLength = 0;
uint32_t p;
// Allocate buffers for the port indices and the default control values
uint32_t numPorts = slv2_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)
slv2_plugin_get_port_ranges_float(mData, minimumValues,
maximumValues, defaultValues);
// Get info about all ports
for(p = 0; p < numPorts; p++) {
SLV2Port port = slv2_plugin_get_port_by_index(mData, p);
LV2Port internalPort;
internalPort.mIndex = p;
// Get the port name
SLV2Value tmpName = slv2_port_get_name(data, port);
internalPort.mName = LAT1CTOWX(slv2_value_as_string(tmpName));
slv2_value_free(tmpName);
// Get the port type
if (slv2_port_is_a(mData, port, gAudioPortClass)) {
if (slv2_port_is_a(mData, port, gInputPortClass))
mAudioInputs.push_back(internalPort);
else if (slv2_port_is_a(mData, port, gOutputPortClass))
mAudioOutputs.push_back(internalPort);
}
else if (slv2_port_is_a(mData, port, gControlPortClass) &&
slv2_port_is_a(mData, port, gInputPortClass)) {
internalPort.mControlBuffer = float(1.0);
internalPort.mMin = minimumValues[p];
internalPort.mMax = maximumValues[p];
internalPort.mDefault = defaultValues[p];
if (std::isfinite(defaultValues[p]))
internalPort.mControlBuffer = defaultValues[p];
else if (std::isfinite(minimumValues[p]))
internalPort.mControlBuffer = minimumValues[p];
else if (std::isfinite(maximumValues[p]))
internalPort.mControlBuffer = maximumValues[p];
if (slv2_port_has_property(data, port, gPortToggled))
internalPort.mToggle = true;
if (slv2_port_has_property(data, port, gPortIsInteger))
internalPort.mInteger = true;
if (slv2_port_has_property(data, port, gPortIsSampleRate))
internalPort.mSampleRate = true;
mControlInputs.push_back(internalPort);
}
else if (slv2_port_is_a(mData, port, gMidiPortClass) &&
slv2_port_is_a(mData, port, gInputPortClass)) {
// If there are more than one MIDI input ports, 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.size() > 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)
flags = PLUGIN_EFFECT;
if (mAudioInputs.size() == 0)
flags |= INSERT_EFFECT;
else if (mAudioOutputs.size() == 0)
flags |= ANALYZE_EFFECT;
else
flags |= PROCESS_EFFECT;
}
