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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* midiprocessor.cc
*
* Thu May 12 09:41:25 CEST 2016
* Copyright 2016 Christian Glöckner
* cgloeckner@freenet.de
****************************************************************************/
/*
* This file is part of DrumGizmo.
*
* DrumGizmo is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* DrumGizmo 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with DrumGizmo; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include "midiprocessor.h"
MidiProcessor::MidiProcessor(MidiMapper& midi_mapper)
: midi_mapper{midi_mapper} {
}
bool MidiProcessor::operator()(std::size_t size, unsigned char const * buffer, event_t& out) {
if (size != 3u) {
// not enough data
return false;
}
// determine event type
switch (buffer[0] & 0xF0) {
case 0x90:
out.type = TYPE_ONSET;
break;
default:
// yet unsupported type
return false;
}
// lookup instrument
int instr = midi_mapper.lookup(buffer[1]);
if (instr == -1) {
// key does not map to an instrument
return false;
}
out.instrument = (std::size_t)instr;
out.velocity = buffer[2] / 127.0;
return true;
}
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