134 lines
4.1 KiB
C++
134 lines
4.1 KiB
C++
/* This file is part of Om. Copyright (C) 2006 Dave Robillard.
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*
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* Om is free software; you can redistribute it and/or modify it under the
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* terms of the GNU General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option) any later
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* version.
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*
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* Om is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "MidiControlNode.h"
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#include <math.h>
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#include "Om.h"
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#include "OmApp.h"
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#include "PostProcessor.h"
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#include "MidiLearnEvent.h"
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#include "InputPort.h"
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#include "OutputPort.h"
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#include "PortInfo.h"
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#include "Plugin.h"
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#include "util.h"
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#include "midi.h"
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namespace Om {
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MidiControlNode::MidiControlNode(const string& path, size_t poly, Patch* parent, samplerate srate, size_t buffer_size)
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: InternalNode(path, 1, parent, srate, buffer_size),
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m_learning(false)
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{
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m_num_ports = 7;
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m_ports.alloc(m_num_ports);
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m_midi_in_port = new InputPort<MidiMessage>(this, "MIDI In", 0, 1,
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new PortInfo("MIDI In", MIDI, INPUT), m_buffer_size);
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m_ports.at(0) = m_midi_in_port;
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m_param_port = new InputPort<sample>(this, "Controller Number", 1, 1,
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new PortInfo("Controller Number", CONTROL, INPUT, INTEGER, 60, 0, 127), 1);
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m_ports.at(1) = m_param_port;
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m_log_port = new InputPort<sample>(this, "Logarithmic", 2, 1,
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new PortInfo("Logarithmic", CONTROL, INPUT, TOGGLE, 0, 0, 1), 1);
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m_ports.at(2) = m_log_port;
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m_min_port = new InputPort<sample>(this, "Min", 3, 1,
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new PortInfo("Min", CONTROL, INPUT, NONE, 0, 0, 65535), 1);
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m_ports.at(3) = m_min_port;
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m_max_port = new InputPort<sample>(this, "Max", 4, 1,
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new PortInfo("Max", CONTROL, INPUT, NONE, 1, 0, 65535), 1);
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m_ports.at(4) = m_max_port;
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m_audio_port = new OutputPort<sample>(this, "Out (AR)", 5, 1,
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new PortInfo("Out (AR)", AUDIO, OUTPUT, 0, 0, 1), m_buffer_size);
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m_ports.at(5) = m_audio_port;
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m_control_port = new OutputPort<sample>(this, "Out (CR)", 6, 1,
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new PortInfo("Out (CR)", CONTROL, OUTPUT, 0, 0, 1), 1);
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m_ports.at(6) = m_control_port;
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m_plugin.type(Plugin::Internal);
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m_plugin.plug_label("midi_control_in");
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m_plugin.name("Om Control Node (MIDI)");
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}
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void
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MidiControlNode::run(size_t nframes)
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{
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InternalNode::run(nframes);
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MidiMessage ev;
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for (size_t i=0; i < m_midi_in_port->buffer(0)->filled_size(); ++i) {
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ev = m_midi_in_port->buffer(0)->value_at(i);
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if ((ev.buffer[0] & 0xF0) == MIDI_CMD_CONTROL)
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control(ev.buffer[1], ev.buffer[2], ev.time);
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}
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}
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void
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MidiControlNode::control(uchar control_num, uchar val, samplecount offset)
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{
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assert(offset < m_buffer_size);
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sample scaled_value;
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const sample nval = (val / 127.0f); // normalized [0, 1]
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if (m_learning) {
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assert(m_learn_event != NULL);
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m_param_port->set_value(control_num, offset);
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assert(m_param_port->buffer(0)->value_at(0) == control_num);
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m_learn_event->set_value(control_num);
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m_learn_event->execute(offset);
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om->post_processor()->push(m_learn_event);
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om->post_processor()->signal();
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m_learning = false;
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m_learn_event = NULL;
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}
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if (m_log_port->buffer(0)->value_at(0) > 0.0f) {
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// haaaaack, stupid negatives and logarithms
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sample log_offset = 0;
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if (m_min_port->buffer(0)->value_at(0) < 0)
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log_offset = fabs(m_min_port->buffer(0)->value_at(0));
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const sample min = log(m_min_port->buffer(0)->value_at(0)+1+log_offset);
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const sample max = log(m_max_port->buffer(0)->value_at(0)+1+log_offset);
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scaled_value = expf(nval * (max - min) + min) - 1 - log_offset;
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} else {
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const sample min = m_min_port->buffer(0)->value_at(0);
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const sample max = m_max_port->buffer(0)->value_at(0);
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scaled_value = ((nval) * (max - min)) + min;
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}
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if (control_num == m_param_port->buffer(0)->value_at(0)) {
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m_control_port->set_value(scaled_value, offset);
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m_audio_port->set_value(scaled_value, offset);
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}
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}
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} // namespace Om
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