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-rw-r--r--src/libs/engine/LADSPANode.cpp269
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diff --git a/src/libs/engine/LADSPANode.cpp b/src/libs/engine/LADSPANode.cpp
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+/* This file is part of Om. Copyright (C) 2006 Dave Robillard.
+ *
+ * Om 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.
+ *
+ * Om 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 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.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+
+#include "LADSPANode.h"
+#include <iostream>
+#include <cassert>
+#include "float.h"
+#include <stdint.h>
+#include <cmath>
+#include "InputPort.h"
+#include "OutputPort.h"
+#include "Plugin.h"
+
+namespace Om {
+
+
+/** Partially construct a LADSPANode.
+ *
+ * Object is not usable until instantiate() is called with success.
+ * (It _will_ crash!)
+ */
+LADSPANode::LADSPANode(const Plugin* plugin, const string& path, size_t poly, Patch* parent, const LADSPA_Descriptor* descriptor, samplerate srate, size_t buffer_size)
+: NodeBase(plugin, path, poly, parent, srate, buffer_size),
+ _descriptor(descriptor),
+ _instances(NULL)
+{
+ assert(_descriptor != NULL);
+}
+
+
+/** Instantiate self from LADSPA plugin descriptor.
+ *
+ * Implemented as a seperate function (rather than in the constructor) to
+ * allow graceful error-catching of broken plugins.
+ *
+ * Returns whether or not plugin was successfully instantiated. If return
+ * value is false, this object may not be used.
+ */
+bool
+LADSPANode::instantiate()
+{
+ // Note that a DSSI plugin might tack more on to the end of this
+ if (!_ports)
+ _ports = new Array<Port*>(_descriptor->PortCount);
+
+ _instances = new LADSPA_Handle[_poly];
+
+ size_t port_buffer_size = 0;
+
+ for (size_t i=0; i < _poly; ++i) {
+ _instances[i] = _descriptor->instantiate(_descriptor, _srate);
+ if (_instances[i] == NULL) {
+ cerr << "Failed to instantiate plugin!" << endl;
+ return false;
+ }
+ }
+
+ string port_name;
+ string port_path;
+
+ Port* port = NULL;
+
+ for (size_t j=0; j < _descriptor->PortCount; ++j) {
+ port_name = _descriptor->PortNames[j];
+ string::size_type slash_index;
+
+ // Name mangling, to guarantee port names are unique
+ for (size_t k=0; k < _descriptor->PortCount; ++k) {
+ assert(_descriptor->PortNames[k] != NULL);
+ if (k != j && port_name == _descriptor->PortNames[k]) { // clash
+ if (LADSPA_IS_PORT_CONTROL(_descriptor->PortDescriptors[j]))
+ port_name += " (CR)";
+ else
+ port_name += " (AR)";
+ }
+ // Replace all slashes with "-" (so they don't screw up paths)
+ while ((slash_index = port_name.find("/")) != string::npos)
+ port_name[slash_index] = '-';
+ }
+
+ port_path = path() + "/" + port_name;
+
+ if (LADSPA_IS_PORT_CONTROL(_descriptor->PortDescriptors[j]))
+ port_buffer_size = 1;
+ else if (LADSPA_IS_PORT_AUDIO(_descriptor->PortDescriptors[j]))
+ port_buffer_size = _buffer_size;
+
+ assert (LADSPA_IS_PORT_INPUT(_descriptor->PortDescriptors[j])
+ || LADSPA_IS_PORT_OUTPUT(_descriptor->PortDescriptors[j]));
+
+ if (LADSPA_IS_PORT_INPUT(_descriptor->PortDescriptors[j])) {
+ port = new InputPort<sample>(this, port_name, j, _poly, DataType::FLOAT, port_buffer_size);
+ _ports->at(j) = port;
+ } else if (LADSPA_IS_PORT_OUTPUT(_descriptor->PortDescriptors[j])) {
+ port = new OutputPort<sample>(this, port_name, j, _poly, DataType::FLOAT, port_buffer_size);
+ _ports->at(j) = port;
+ }
+
+ assert(_ports->at(j) != NULL);
+
+ /*PortInfo* pi = port->port_info();
+ get_port_vals(j, pi);
+ */
+ float default_val = 0.; // FIXME
+
+ // Set default control val
+ if (port->buffer_size() == 1)
+ ((PortBase<sample>*)port)->set_value(default_val, 0);
+ else
+ ((PortBase<sample>*)port)->set_value(0.0f, 0);
+ }
+
+ return true;
+}
+
+
+LADSPANode::~LADSPANode()
+{
+ for (size_t i=0; i < _poly; ++i)
+ _descriptor->cleanup(_instances[i]);
+
+ delete[] _instances;
+}
+
+
+void
+LADSPANode::activate()
+{
+ NodeBase::activate();
+
+ PortBase<sample>* port = NULL;
+
+ for (size_t i=0; i < _poly; ++i) {
+ for (unsigned long j=0; j < _descriptor->PortCount; ++j) {
+ port = static_cast<PortBase<sample>*>(_ports->at(j));
+ set_port_buffer(i, j, ((PortBase<sample>*)_ports->at(j))->buffer(i)->data());
+ if (port->type() == DataType::FLOAT && port->buffer_size() == 1)
+ port->set_value(0.0f, 0); // FIXME
+ else if (port->type() == DataType::FLOAT && port->buffer_size() > 1)
+ port->set_value(0.0f, 0);
+ }
+ if (_descriptor->activate != NULL)
+ _descriptor->activate(_instances[i]);
+ }
+}
+
+
+void
+LADSPANode::deactivate()
+{
+ NodeBase::deactivate();
+
+ for (size_t i=0; i < _poly; ++i)
+ if (_descriptor->deactivate != NULL)
+ _descriptor->deactivate(_instances[i]);
+}
+
+
+void
+LADSPANode::run(size_t nframes)
+{
+ NodeBase::run(nframes); // mixes down input ports
+ for (size_t i=0; i < _poly; ++i)
+ _descriptor->run(_instances[i], nframes);
+}
+
+
+void
+LADSPANode::set_port_buffer(size_t voice, size_t port_num, void* buf)
+{
+ assert(voice < _poly);
+
+ // Could be a MIDI port after this
+ if (port_num < _descriptor->PortCount) {
+ _descriptor->connect_port(_instances[voice], port_num, (sample*)buf);
+ }
+}
+
+#if 0
+// Based on code stolen from jack-rack
+void
+LADSPANode::get_port_vals(ulong port_index, PortInfo* info)
+{
+ LADSPA_Data upper = 0.0f;
+ LADSPA_Data lower = 0.0f;
+ LADSPA_Data normal = 0.0f;
+ LADSPA_PortRangeHintDescriptor hint_descriptor = _descriptor->PortRangeHints[port_index].HintDescriptor;
+
+ /* set upper and lower, possibly adjusted to the sample rate */
+ if (LADSPA_IS_HINT_SAMPLE_RATE(hint_descriptor)) {
+ upper = _descriptor->PortRangeHints[port_index].UpperBound * _srate;
+ lower = _descriptor->PortRangeHints[port_index].LowerBound * _srate;
+ } else {
+ upper = _descriptor->PortRangeHints[port_index].UpperBound;
+ lower = _descriptor->PortRangeHints[port_index].LowerBound;
+ }
+
+ if (LADSPA_IS_HINT_LOGARITHMIC(hint_descriptor)) {
+ /* FLT_EPSILON is defined as the different between 1.0 and the minimum
+ * float greater than 1.0. So, if lower is < FLT_EPSILON, it will be 1.0
+ * and the logarithmic control will have a base of 1 and thus not change
+ */
+ if (lower < FLT_EPSILON) lower = FLT_EPSILON;
+ }
+
+
+ if (LADSPA_IS_HINT_HAS_DEFAULT(hint_descriptor)) {
+
+ if (LADSPA_IS_HINT_DEFAULT_MINIMUM(hint_descriptor)) {
+ normal = lower;
+ } else if (LADSPA_IS_HINT_DEFAULT_LOW(hint_descriptor)) {
+ if (LADSPA_IS_HINT_LOGARITHMIC(hint_descriptor)) {
+ normal = exp(log(lower) * 0.75 + log(upper) * 0.25);
+ } else {
+ normal = lower * 0.75 + upper * 0.25;
+ }
+ } else if (LADSPA_IS_HINT_DEFAULT_MIDDLE(hint_descriptor)) {
+ if (LADSPA_IS_HINT_LOGARITHMIC(hint_descriptor)) {
+ normal = exp(log(lower) * 0.5 + log(upper) * 0.5);
+ } else {
+ normal = lower * 0.5 + upper * 0.5;
+ }
+ } else if (LADSPA_IS_HINT_DEFAULT_HIGH(hint_descriptor)) {
+ if (LADSPA_IS_HINT_LOGARITHMIC(hint_descriptor)) {
+ normal = exp(log(lower) * 0.25 + log(upper) * 0.75);
+ } else {
+ normal = lower * 0.25 + upper * 0.75;
+ }
+ } else if (LADSPA_IS_HINT_DEFAULT_MAXIMUM(hint_descriptor)) {
+ normal = upper;
+ } else if (LADSPA_IS_HINT_DEFAULT_0(hint_descriptor)) {
+ normal = 0.0;
+ } else if (LADSPA_IS_HINT_DEFAULT_1(hint_descriptor)) {
+ normal = 1.0;
+ } else if (LADSPA_IS_HINT_DEFAULT_100(hint_descriptor)) {
+ normal = 100.0;
+ } else if (LADSPA_IS_HINT_DEFAULT_440(hint_descriptor)) {
+ normal = 440.0;
+ }
+ } else { // No default hint
+ if (LADSPA_IS_HINT_BOUNDED_BELOW(hint_descriptor)) {
+ normal = lower;
+ } else if (LADSPA_IS_HINT_BOUNDED_ABOVE(hint_descriptor)) {
+ normal = upper;
+ }
+ }
+
+ info->min_val(lower);
+ info->default_val(normal);
+ info->max_val(upper);
+}
+#endif
+
+} // namespace Om
+
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