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/*
* Copyright (C) 2017 Ben Loftis <ben@harrisonconsoles.com>
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <cmath>
#include "pbd/compose.h"
#include "ardour/debug.h"
#include "fader.h"
#include "surface.h"
#include "control_group.h"
#include "us2400_control_protocol.h"
using namespace ArdourSurface;
using namespace US2400;
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 ()
{
int posi = lrintf (16384.0 * position);
if (posi == last_update_position) {
if (posi == llast_update_position) {
return MidiByteArray();
}
}
llast_update_position = last_update_position;
last_update_position = posi;
DEBUG_TRACE (DEBUG::US2400, 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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