2017-10-05 11:54:46 -04:00
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/*
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2019-08-03 08:34:29 -04:00
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* Copyright (C) 2017 Ben Loftis <ben@harrisonconsoles.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more 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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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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2017-10-05 11:54:46 -04:00
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#include <cmath>
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#include "pot.h"
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#include "surface.h"
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#include "control_group.h"
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using namespace ArdourSurface;
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using namespace US2400;
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int const Pot::External = 0x2e; /* specific ID for "vpot" representing external control */
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int const Pot::ID = 0x10; /* base value for v-pot IDs */
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Control*
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Pot::factory (Surface& surface, int id, const char* name, Group& group)
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{
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Pot* p = new Pot (id, name, group);
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surface.pots[id] = p;
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surface.controls.push_back (p);
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group.add (*p);
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return p;
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}
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MidiByteArray
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Pot::set (float val, bool onoff)
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{
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int posi = lrintf (128.0 * val);
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if (posi == last_update_position) {
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if (posi == llast_update_position) {
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return MidiByteArray();
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}
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}
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llast_update_position = last_update_position;
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last_update_position = posi;
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// TODO do an exact calc for 0.50? To allow manually re-centering the port.
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// center on if val is "very close" to 0.50
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MIDI::byte msg = (val > 0.48 && val < 0.58 ? 1 : 0) << 6;
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// Pot/LED mode
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msg |= (_mode << 4);
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/*
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* Even though a width value may be negative, there is
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* technically still width there, it is just reversed,
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* so make sure to show it on the LED ring appropriately.
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*/
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if (val < 0){
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val = val * -1;
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}
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// val, but only if off hasn't explicitly been set
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if (onoff) {
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if (_mode == spread) {
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msg |= (lrintf (val * 6)) & 0x0f; // 0b00001111
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} else {
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msg |= (lrintf (val * 10.0) + 1) & 0x0f; // 0b00001111
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}
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}
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/* outbound LED message requires 0x20 to be added to the LED's id
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*/
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return MidiByteArray (3, 0xb0, 0x20 + id(), msg);
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}
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