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/*
* Copyright 2009,2010 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 "ArrayArithmetic.h"
#include "DspTableRead4.h"
#include "PdGraph.h"
MessageObject *DspTableRead4::newObject(PdMessage *initMessage, PdGraph *graph) {
return new DspTableRead4(initMessage, graph);
}
DspTableRead4::DspTableRead4(PdMessage *initMessage, PdGraph *graph) : DspObject(2, 1, 0, 1, graph) {
name = initMessage->isSymbol(0) ? StaticUtils::copyString(initMessage->getSymbol(0)) : NULL;
table = NULL;
offset = 0.0f;
}
DspTableRead4::~DspTableRead4() {
free(name);
}
void DspTableRead4::setTable(MessageTable *aTable) {
table = aTable;
}
void DspTableRead4::processMessage(int inletIndex, PdMessage *message) {
switch (inletIndex) {
case 0: {
if (message->isSymbol(0, "set") && message->isSymbol(1)) {
// change the table from which this object reads
free(name);
name = StaticUtils::copyString(message->getSymbol(1));
table = graph->getTable(name);
}
break;
}
case 1: {
if (message->isFloat(0)) {
offset = message->getFloat(0); // set onset into table
}
break;
}
default: {
break;
}
}
}
void DspTableRead4::processDspWithIndex(int fromIndex, int toIndex) {
if (table != NULL) { // ensure that there is a table to read from!
int bufferLength = 0;
float *buffer = table->getBuffer(&bufferLength);
#if __APPLE__
//float zero = 0.0f;
//float bufferLengthFloat = (float) (bufferLength-2);
//vDSP_vclip(inputBuffer+startSampleIndex, 1, &zero, &bufferLengthFloat,
// inputBuffer+startSampleIndex, 1, endSampleIndex-startSampleIndex);
// NOTE(mhroth): is isn't clear what the clipping behaviour of vDSP_vlint is, but I
// *think* that it is doing the right thing (i.e., clipping OOB indicies)
int duration = toIndex - fromIndex;
vDSP_vsadd(dspBufferAtInlet[0]+fromIndex, 1, &offset, dspBufferAtOutlet[0]+fromIndex, 1, duration);
vDSP_vlint(buffer, dspBufferAtOutlet[0]+fromIndex, 1, dspBufferAtOutlet[0]+fromIndex, 1,
duration, bufferLength);
#else
float *inputBuffer = dspBufferAtInlet[0];
int maxIndex = bufferLength-1;
for (int i = fromIndex; i < toIndex; i++) {
float xf = inputBuffer[i] + offset;
int xi = (int) xf;
if (xi <= 0) {
dspBufferAtOutlet[0][i] = buffer[0];
} else if (xi >= maxIndex) {
dspBufferAtOutlet[0][i] = buffer[maxIndex];
} else {
// 2-point linear interpolation (basic and fast)
float dx = xf - ((float) xi);
float y0 = buffer[xi];
float y1 = buffer[xi+1];
float slope = (y1 - y0);
dspBufferAtOutlet[0][i] = (slope * dx) + y0;
}
}
#endif
}
}