73 lines
1.9 KiB
C++
73 lines
1.9 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 "pbd/compose.h"
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#include "ardour/debug.h"
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#include "fader.h"
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#include "surface.h"
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#include "control_group.h"
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#include "mackie_control_protocol.h"
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using namespace ArdourSurface;
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using namespace Mackie;
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using namespace PBD;
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Control*
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Fader::factory (Surface& surface, int id, const char* name, Group& group)
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{
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Fader* f = new Fader (id, name, group);
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surface.faders[id] = f;
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surface.controls.push_back (f);
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group.add (*f);
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return f;
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}
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MidiByteArray
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Fader::set_position (float normalized)
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{
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position = normalized;
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return update_message ();
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}
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MidiByteArray
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Fader::update_message ()
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{
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MackieControlProtocol* mcp = MackieControlProtocol::instance ();
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if (mcp && mcp->flip_mode() == MackieControlProtocol::Zero) {
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/* do not send messages to move the faders when in this mode */
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return MidiByteArray();
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}
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int posi = lrintf (16384.0 * position);
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if (posi == last_update_position) {
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return MidiByteArray();
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}
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last_update_position = posi;
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DEBUG_TRACE (DEBUG::MackieControl, string_compose ("generate fader message for position %1 (%2)\n", position, posi));
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return MidiByteArray (3, 0xe0 + id(), posi & 0x7f, posi >> 7);
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}
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