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/*
Copyright (C) 2006,2007 John Anderson
Copyright (C) 2012 Paul Davis
This program 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.
This program 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 more 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <cmath>
#include "pbd/compose.h"
#include "ardour/debug.h"
#include "fader.h"
#include "surface.h"
#include "control_group.h"
#include "mackie_control_protocol.h"
using namespace ArdourSurface;
using namespace Mackie;
using namespace PBD;
Control*
Fader::factory (Surface& surface, int id, const char* name, Group& group)
{
Fader* f = new Fader (id, name, group);
surface.faders[id] = f;
surface.controls.push_back (f);
group.add (*f);
return f;
}
MidiByteArray
Fader::set_position (float normalized)
{
position = normalized;
return update_message ();
}
MidiByteArray
Fader::update_message ()
{
MackieControlProtocol* mcp = MackieControlProtocol::instance ();
if (mcp && mcp->flip_mode() == MackieControlProtocol::Zero) {
/* do not send messages to move the faders when in this mode */
return MidiByteArray();
}
int posi = lrintf (16384.0 * position);
if (posi == last_update_position) {
return MidiByteArray();
}
last_update_position = posi;
DEBUG_TRACE (DEBUG::MackieControl, string_compose ("generate fader message for position %1 (%2)\n", position, posi));
return MidiByteArray (3, 0xe0 + id(), posi & 0x7f, posi >> 7);
}
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