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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 "MessageChange.h"
MessageObject *MessageChange::newObject(PdMessage *initMessage, PdGraph *graph) {
return new MessageChange(initMessage, graph);
}
MessageChange::MessageChange(PdMessage *initMessage, PdGraph *graph) : MessageObject(1, 1, graph) {
prevValue = initMessage->isFloat(0) ? initMessage->getFloat(0) : 0.0f;
}
MessageChange::~MessageChange() {
// nothing to do
}
void MessageChange::processMessage(int inletIndex, PdMessage *message) {
switch (message->getType(0)) {
case FLOAT: {
// output only if input is different than what is already there
float messageValue = message->getFloat(0);
if (messageValue != prevValue) {
PdMessage *outgoingMessage = PD_MESSAGE_ON_STACK(1);
outgoingMessage->initWithTimestampAndFloat(message->getTimestamp(), messageValue);
prevValue = messageValue;
sendMessage(0, outgoingMessage);
}
break;
}
case BANG: {
// force output
PdMessage *outgoingMessage = PD_MESSAGE_ON_STACK(1);
outgoingMessage->initWithTimestampAndFloat(message->getTimestamp(), prevValue);
sendMessage(0, outgoingMessage);
break;
}
case SYMBOL: {
if (message->isSymbol(0, "set") && message->isFloat(1)) {
prevValue = message->getFloat(1);
}
break;
}
default: {
break;
}
}
}
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