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Diffstat (limited to 'src/engine/internals/Trigger.cpp')
| -rw-r--r-- | src/engine/internals/Trigger.cpp | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/src/engine/internals/Trigger.cpp b/src/engine/internals/Trigger.cpp new file mode 100644 index 00000000..cb7ae2fe --- /dev/null +++ b/src/engine/internals/Trigger.cpp @@ -0,0 +1,152 @@ +/* This file is part of Ingen. + * Copyright (C) 2007-2009 Dave 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 <cmath> +#include "raul/midi_events.h" +#include "internals/Trigger.hpp" +#include "AudioBuffer.hpp" +#include "EventBuffer.hpp" +#include "InputPort.hpp" +#include "InternalPlugin.hpp" +#include "OutputPort.hpp" +#include "ProcessContext.hpp" +#include "util.hpp" + +using namespace std; + +namespace Ingen { + +using namespace Shared; + +static InternalPlugin trigger_plugin(NS_INTERNALS "Trigger", "trigger"); + +TriggerNode::TriggerNode(const string& path, bool polyphonic, PatchImpl* parent, SampleRate srate, size_t buffer_size) + : NodeBase(&trigger_plugin, path, false, parent, srate, buffer_size) + , _learning(false) +{ + _ports = new Raul::Array<PortImpl*>(5); + + _midi_in_port = new InputPort(this, "input", 0, 1, DataType::EVENT, Raul::Atom(), _buffer_size); + _ports->at(0) = _midi_in_port; + + _note_port = new InputPort(this, "note", 1, 1, DataType::CONTROL, 60.0f, 1); + _note_port->set_property("lv2:minimum", 0.0f); + _note_port->set_property("lv2:maximum", 127.0f); + _note_port->set_property("lv2:integer", true); + _ports->at(1) = _note_port; + + _gate_port = new OutputPort(this, "gate", 2, 1, DataType::AUDIO, 0.0f, _buffer_size); + _gate_port->set_property("lv2:toggled", true); + _ports->at(2) = _gate_port; + + _trig_port = new OutputPort(this, "trigger", 3, 1, DataType::AUDIO, 0.0f, _buffer_size); + _trig_port->set_property("lv2:toggled", true); + _ports->at(3) = _trig_port; + + _vel_port = new OutputPort(this, "velocity", 4, 1, DataType::AUDIO, 0.0f, _buffer_size); + _vel_port->set_property("lv2:minimum", 0.0f); + _vel_port->set_property("lv2:maximum", 1.0f); + _ports->at(4) = _vel_port; +} + + +void +TriggerNode::process(ProcessContext& context) +{ + NodeBase::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); + //assert(midi_in->this_nframes() == context.nframes()); + + midi_in->rewind(); + + while (midi_in->get_event(&frames, &subframes, &type, &size, &buf)) { + const FrameTime time = context.start() + (FrameTime)frames; + + if (size >= 3) { + switch (buf[0] & 0xF0) { + case MIDI_CMD_NOTE_ON: + if (buf[2] == 0) + note_off(context, buf[1], time); + else + note_on(context, buf[1], buf[2], time); + break; + case MIDI_CMD_NOTE_OFF: + note_off(context, buf[1], time); + break; + case MIDI_CMD_CONTROL: + if (buf[1] == MIDI_CTL_ALL_NOTES_OFF + || buf[1] == MIDI_CTL_ALL_SOUNDS_OFF) + ((AudioBuffer*)_gate_port->buffer(0))->set_value(0.0f, context.start(), time); + default: + break; + } + } + + midi_in->increment(); + } + + NodeBase::post_process(context); +} + + +void +TriggerNode::note_on(ProcessContext& context, uint8_t note_num, uint8_t velocity, FrameTime time) +{ + assert(time >= context.start() && time <= context.end()); + assert(time - context.start() < _buffer_size); + + if (_learning) { + _note_port->set_value(note_num); + ((AudioBuffer*)_note_port->buffer(0))->set_value( + (float)note_num, context.start(), context.end()); + _note_port->broadcast_value(context, true); + _learning = false; + } + + /*cerr << "[TriggerNode] " << path() << " Note " << (int)note_num << " on @ " << time << endl;*/ + + Sample filter_note = ((AudioBuffer*)_note_port->buffer(0))->value_at(0); + if (filter_note >= 0.0 && filter_note < 127.0 && (note_num == (uint8_t)filter_note)) { + ((AudioBuffer*)_gate_port->buffer(0))->set_value(1.0f, context.start(), time); + ((AudioBuffer*)_trig_port->buffer(0))->set_value(1.0f, context.start(), time); + ((AudioBuffer*)_trig_port->buffer(0))->set_value(0.0f, context.start(), time + 1); + ((AudioBuffer*)_vel_port->buffer(0))->set_value(velocity / 127.0f, context.start(), time); + assert(((AudioBuffer*)_trig_port->buffer(0))->data()[time - context.start()] == 1.0f); + } +} + + +void +TriggerNode::note_off(ProcessContext& context, uint8_t note_num, FrameTime time) +{ + assert(time >= context.start() && time <= context.end()); + assert(time - context.start() < _buffer_size); + + if (note_num == lrintf(((AudioBuffer*)_note_port->buffer(0))->value_at(0))) + ((AudioBuffer*)_gate_port->buffer(0))->set_value(0.0f, context.start(), time); +} + + +} // namespace Ingen + |