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Diffstat (limited to 'src/server/internals/Controller.cpp')
-rw-r--r-- | src/server/internals/Controller.cpp | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/src/server/internals/Controller.cpp b/src/server/internals/Controller.cpp new file mode 100644 index 00000000..3d477de6 --- /dev/null +++ b/src/server/internals/Controller.cpp @@ -0,0 +1,147 @@ +/* This file is part of Ingen. + * Copyright 2007-2011 David Robillard <http://drobilla.net> + * + * Ingen 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. + * + * Ingen 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., + * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <math.h> +#include "raul/midi_events.h" +#include "shared/LV2URIMap.hpp" +#include "internals/Controller.hpp" +#include "PostProcessor.hpp" +#include "events/SendPortValue.hpp" +#include "InputPort.hpp" +#include "OutputPort.hpp" +#include "InternalPlugin.hpp" +#include "AudioBuffer.hpp" +#include "ProcessContext.hpp" +#include "EventBuffer.hpp" +#include "util.hpp" + +using namespace std; + +namespace Ingen { +namespace Server { +namespace Internals { + +InternalPlugin* ControllerNode::internal_plugin(Shared::LV2URIMap& uris) { + return new InternalPlugin(uris, NS_INTERNALS "Controller", "controller"); +} + +ControllerNode::ControllerNode(InternalPlugin* plugin, + BufferFactory& bufs, + const string& path, + bool polyphonic, + PatchImpl* parent, + SampleRate srate) + : NodeImpl(plugin, path, false, parent, srate) + , _learning(false) +{ + const Ingen::Shared::LV2URIMap& uris = bufs.uris(); + _ports = new Raul::Array<PortImpl*>(6); + + _midi_in_port = new InputPort(bufs, this, "input", 0, 1, PortType::EVENTS, Raul::Atom()); + _midi_in_port->set_property(uris.lv2_name, "Input"); + _ports->at(0) = _midi_in_port; + + _param_port = new InputPort(bufs, this, "controller", 1, 1, PortType::CONTROL, 0.0f); + _param_port->set_property(uris.lv2_minimum, 0.0f); + _param_port->set_property(uris.lv2_maximum, 127.0f); + _param_port->set_property(uris.lv2_integer, true); + _param_port->set_property(uris.lv2_name, "Controller"); + _ports->at(1) = _param_port; + + _log_port = new InputPort(bufs, this, "logarithmic", 2, 1, PortType::CONTROL, 0.0f); + _log_port->set_property(uris.lv2_portProperty, uris.lv2_toggled); + _log_port->set_property(uris.lv2_name, "Logarithmic"); + _ports->at(2) = _log_port; + + _min_port = new InputPort(bufs, this, "minimum", 3, 1, PortType::CONTROL, 0.0f); + _min_port->set_property(uris.lv2_name, "Minimum"); + _ports->at(3) = _min_port; + + _max_port = new InputPort(bufs, this, "maximum", 4, 1, PortType::CONTROL, 1.0f); + _max_port->set_property(uris.lv2_name, "Maximum"); + _ports->at(4) = _max_port; + + _audio_port = new OutputPort(bufs, this, "ar_output", 5, 1, PortType::AUDIO, 0.0f); + _audio_port->set_property(uris.lv2_name, "Output"); + _ports->at(5) = _audio_port; +} + +void +ControllerNode::process(ProcessContext& context) +{ + NodeImpl::pre_process(context); + + uint32_t frames = 0; + uint32_t subframes = 0; + uint16_t type = 0; + uint16_t size = 0; + uint8_t* buf = NULL; + + EventBuffer* const midi_in = (EventBuffer*)_midi_in_port->buffer(0).get(); + + midi_in->rewind(); + + while (midi_in->get_event(&frames, &subframes, &type, &size, &buf)) { + // FIXME: type + if (size >= 3 && (buf[0] & 0xF0) == MIDI_CMD_CONTROL) + control(context, buf[1], buf[2], frames + context.start()); + + midi_in->increment(); + } + + NodeImpl::post_process(context); +} + +void +ControllerNode::control(ProcessContext& context, uint8_t control_num, uint8_t val, FrameTime time) +{ + Sample scaled_value; + + const Sample nval = (val / 127.0f); // normalized [0, 1] + + if (_learning) { + _param_port->set_value(control_num); + ((AudioBuffer*)_param_port->buffer(0).get())->set_value( + (float)control_num, context.start(), context.end()); + _param_port->broadcast_value(context, true); + _learning = false; + } + + const Sample min_port_val = ((AudioBuffer*)_min_port->buffer(0).get())->value_at(0); + const Sample max_port_val = ((AudioBuffer*)_max_port->buffer(0).get())->value_at(0); + const Sample log_port_val = ((AudioBuffer*)_log_port->buffer(0).get())->value_at(0); + + if (log_port_val > 0.0f) { + // haaaaack, stupid negatives and logarithms + Sample log_offset = 0; + if (min_port_val < 0) + log_offset = fabs(min_port_val); + const Sample min = log(min_port_val + 1 + log_offset); + const Sample max = log(max_port_val + 1 + log_offset); + scaled_value = expf(nval * (max - min) + min) - 1 - log_offset; + } else { + scaled_value = ((nval) * (max_port_val - min_port_val)) + min_port_val; + } + + if (control_num == ((AudioBuffer*)_param_port->buffer(0).get())->value_at(0)) + ((AudioBuffer*)_audio_port->buffer(0).get())->set_value(scaled_value, context.start(), time); +} + +} // namespace Internals +} // namespace Server +} // namespace Ingen + |