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/*
* Copyright 2009,2010,2011 Reality Jockey, Ltd.
* info@rjdj.me
* http://rjdj.me/
*
* This file is part of ZenGarden.
*
* ZenGarden 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.
*
* ZenGarden 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 ZenGarden. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "MessageFrequencyToMidi.h"
MessageObject *MessageFrequencyToMidi::newObject(PdMessage *initMessage, PdGraph *graph) {
return new MessageFrequencyToMidi(graph);
}
MessageFrequencyToMidi::MessageFrequencyToMidi(PdGraph *graph) : MessageObject(1, 1, graph) {
// nothing to do
}
MessageFrequencyToMidi::~MessageFrequencyToMidi() {
// nothing to do
}
void MessageFrequencyToMidi::processMessage(int inletIndex, PdMessage *message) {
if (message->isFloat(0)) {
PdMessage *outgoingMessage = PD_MESSAGE_ON_STACK(1);
float f = message->getFloat(0);
float value = (f <= 0.0f) ? -1500.0f : (12.0f * (logf(f / 440.0f) / M_LN2)) + 69.0f;
outgoingMessage->initWithTimestampAndFloat(message->getTimestamp(), value);
sendMessage(0, outgoingMessage); // send a message from outlet 0
}
}