From 93850c202de8b073a1ce1dd8bd246d407bce4e2f Mon Sep 17 00:00:00 2001 From: David Robillard Date: Tue, 30 Sep 2008 16:50:21 +0000 Subject: Flatten ingen source directory heirarchy a bit. git-svn-id: http://svn.drobilla.net/lad/trunk/ingen@1551 a436a847-0d15-0410-975c-d299462d15a1 --- src/engine/MidiTriggerNode.cpp | 135 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 135 insertions(+) create mode 100644 src/engine/MidiTriggerNode.cpp (limited to 'src/engine/MidiTriggerNode.cpp') diff --git a/src/engine/MidiTriggerNode.cpp b/src/engine/MidiTriggerNode.cpp new file mode 100644 index 00000000..aa2c272f --- /dev/null +++ b/src/engine/MidiTriggerNode.cpp @@ -0,0 +1,135 @@ +/* This file is part of Ingen. + * Copyright (C) 2007 Dave Robillard + * + * 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 +#include +#include "MidiTriggerNode.hpp" +#include "AudioBuffer.hpp" +#include "InputPort.hpp" +#include "OutputPort.hpp" +#include "InternalPlugin.hpp" +#include "ProcessContext.hpp" +#include "EventBuffer.hpp" +#include "util.hpp" + +using namespace std; + +namespace Ingen { + + +MidiTriggerNode::MidiTriggerNode(const string& path, bool polyphonic, PatchImpl* parent, SampleRate srate, size_t buffer_size) + : NodeBase(new InternalPlugin(NS_INGEN "trigger_node", "trigger", "MIDI Trigger"), + path, false, parent, srate, buffer_size) +{ + _ports = new Raul::Array(5); + + _midi_in_port = new InputPort(this, "input", 0, 1, DataType::EVENT, 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_variable("ingen:minimum", 0.0f); + _note_port->set_variable("ingen:maximum", 127.0f); + _note_port->set_variable("ingen:integer", true); + _ports->at(1) = _note_port; + + _gate_port = new OutputPort(this, "gate", 2, 1, DataType::AUDIO, 0.0f, _buffer_size); + _ports->at(2) = _gate_port; + + _trig_port = new OutputPort(this, "trigger", 3, 1, DataType::AUDIO, 0.0f, _buffer_size); + _ports->at(3) = _trig_port; + + _vel_port = new OutputPort(this, "velocity", 4, 1, DataType::AUDIO, 0.0f, _buffer_size); + _ports->at(4) = _vel_port; +} + + +void +MidiTriggerNode::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()); + + 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 +MidiTriggerNode::note_on(ProcessContext& context, uchar note_num, uchar velocity, FrameTime time) +{ + assert(time >= context.start() && time <= context.end()); + assert(time - context.start() < _buffer_size); + + /*cerr << "[MidiTriggerNode] " << 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 == (uchar)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 +MidiTriggerNode::note_off(ProcessContext& context, uchar 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 + -- cgit v1.2.1