Paul Davis
9429401f11
git-svn-id: svn://localhost/ardour2/branches/3.0@12739 d708f5d6-7413-0410-9779-e7cbd77b26cf
76 lines
2.0 KiB
C++
76 lines
2.0 KiB
C++
/*
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Copyright (C) 2006,2007 John Anderson
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Copyright (C) 2012 Paul Davis
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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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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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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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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 Mackie;
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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, Mode mode)
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{
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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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