From 36f1e2ea3d2c7d20d8fa267a3a66438044e99e8e Mon Sep 17 00:00:00 2001 From: David Robillard Date: Sun, 18 Jun 2006 19:26:53 +0000 Subject: Reworked use of Plugin class in engine slightly (more RAII-ey) git-svn-id: http://svn.drobilla.net/lad/grauph@56 a436a847-0d15-0410-975c-d299462d15a1 --- src/libs/engine/LV2Node.cpp | 263 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 263 insertions(+) create mode 100644 src/libs/engine/LV2Node.cpp (limited to 'src/libs/engine/LV2Node.cpp') diff --git a/src/libs/engine/LV2Node.cpp b/src/libs/engine/LV2Node.cpp new file mode 100644 index 00000000..34bbe61e --- /dev/null +++ b/src/libs/engine/LV2Node.cpp @@ -0,0 +1,263 @@ +/* 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 "LV2Node.h" +#include +#include +#include "float.h" +#include +#include +#include "InputPort.h" +#include "OutputPort.h" +#include "Plugin.h" + +namespace Om { + + +/** Partially construct a LV2Node. + * + * Object is not usable until instantiate() is called with success. + * (It _will_ crash!) + */ +LV2Node::LV2Node(const Plugin* plugin, + const string& name, + size_t poly, + Patch* parent, + samplerate srate, + size_t buffer_size) +: NodeBase(plugin, name, poly, parent, srate, buffer_size), + _lv2_plugin(plugin->slv2_plugin()), + _instances(NULL) +{ + assert(_lv2_plugin); +} + + +/** Instantiate self from LV2 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 +LV2Node::instantiate() +{ + size_t num_ports = slv2_plugin_get_num_ports(_lv2_plugin); + assert(num_ports > 0); + _ports->alloc(num_ports); + + _instances = new SLV2Instance*[_poly]; + + size_t port_buffer_size = 0; + + for (size_t i=0; i < _poly; ++i) { + _instances[i] = slv2_plugin_instantiate(_lv2_plugin, _srate, NULL); + 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 < num_ports; ++j) { + // LV2 shortnames are guaranteed to be unique, valid C identifiers + port_name = (char*)slv2_port_get_symbol(_lv2_plugin, j); + + assert(port_name.find("/") == string::npos); + + port_path = path() + "/" + port_name; + + // Assumes there is only the 4 classes + + SLV2PortClass port_class = slv2_port_get_class(_lv2_plugin, j); + const bool is_control = (port_class == SLV2_CONTROL_RATE_INPUT + || port_class == SLV2_CONTROL_RATE_OUTPUT); + const bool is_input = (port_class == SLV2_CONTROL_RATE_INPUT + || port_class == SLV2_AUDIO_RATE_INPUT); + + if (is_control) + port_buffer_size = 1; + else + port_buffer_size = _buffer_size; + + if (is_input) { + port = new InputPort(this, port_name, j, _poly, DataType::FLOAT, port_buffer_size); + _ports->at(j) = port; + } else /* output */ { + port = new OutputPort(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); + + // Set default control val + /*if (pi->is_control()) + ((PortBase*)port)->set_value(pi->default_val(), 0); + else + ((PortBase*)port)->set_value(0.0f, 0);*/ + } + return true; +} + + +LV2Node::~LV2Node() +{ + for (size_t i=0; i < _poly; ++i) + slv2_instance_free(_instances[i]); + + delete[] _instances; +} + + +void +LV2Node::activate() +{ + NodeBase::activate(); + + PortBase* port = NULL; + + for (size_t i=0; i < _poly; ++i) { + for (unsigned long j=0; j < num_ports(); ++j) { + port = static_cast*>(_ports->at(j)); + set_port_buffer(i, j, ((PortBase*)_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); + } + slv2_instance_activate(_instances[i]); + } +} + + +void +LV2Node::deactivate() +{ + NodeBase::deactivate(); + + for (size_t i=0; i < _poly; ++i) + slv2_instance_deactivate(_instances[i]); +} + + +void +LV2Node::run(size_t nframes) +{ + NodeBase::run(nframes); // mixes down input ports + for (size_t i=0; i < _poly; ++i) + slv2_instance_run(_instances[i], nframes); +} + + +void +LV2Node::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 < num_ports()) { + slv2_instance_connect_port(_instances[voice], port_num, buf); + } +} + + +#if 0 +// Based on code stolen from jack-rack +void +LV2Node::get_port_vals(ulong port_index, PortInfo* info) +{ + LV2_Data upper = 0.0f; + LV2_Data lower = 0.0f; + LV2_Data normal = 0.0f; + LV2_PortRangeHintDescriptor hint_descriptor = _descriptor->PortRangeHints[port_index].HintDescriptor; + + /* set upper and lower, possibly adjusted to the sample rate */ + if (LV2_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 (LV2_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 (LV2_IS_HINT_HAS_DEFAULT(hint_descriptor)) { + + if (LV2_IS_HINT_DEFAULT_MINIMUM(hint_descriptor)) { + normal = lower; + } else if (LV2_IS_HINT_DEFAULT_LOW(hint_descriptor)) { + if (LV2_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 (LV2_IS_HINT_DEFAULT_MIDDLE(hint_descriptor)) { + if (LV2_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 (LV2_IS_HINT_DEFAULT_HIGH(hint_descriptor)) { + if (LV2_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 (LV2_IS_HINT_DEFAULT_MAXIMUM(hint_descriptor)) { + normal = upper; + } else if (LV2_IS_HINT_DEFAULT_0(hint_descriptor)) { + normal = 0.0; + } else if (LV2_IS_HINT_DEFAULT_1(hint_descriptor)) { + normal = 1.0; + } else if (LV2_IS_HINT_DEFAULT_100(hint_descriptor)) { + normal = 100.0; + } else if (LV2_IS_HINT_DEFAULT_440(hint_descriptor)) { + normal = 440.0; + } + } else { // No default hint + if (LV2_IS_HINT_BOUNDED_BELOW(hint_descriptor)) { + normal = lower; + } else if (LV2_IS_HINT_BOUNDED_ABOVE(hint_descriptor)) { + normal = upper; + } + } + + info->min_val(lower); + info->default_val(normal); + info->max_val(upper); +} +#endif + + +} // namespace Om + -- cgit v1.2.1