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/*
* Copyright 2009,2010,2011,2012 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 "DspLog.h"
#include "PdGraph.h"
message::Object *DspLog::new_object(pd::Message *init_message, PdGraph *graph) {
return new DspLog(init_message, graph);
}
DspLog::DspLog(pd::Message *init_message, PdGraph *graph) : DspObject(2, 2, 0, 1, graph) {
// by default assume ln
invLog2Base = init_message->is_float(0) ? 1.0f/log2f(init_message->get_float(0)) : 1.0f/M_LOG2E;
process_function = &processScalar;
process_functionNoMessage = &processScalar;
}
DspLog::~DspLog() {
// nothing to do
}
void DspLog::onInletConnectionUpdate(unsigned int inlet_index) {
process_function = (incomingDspConnections[0].size() > 0 && incomingDspConnections[1].size() > 0)
? &processSignal : &processScalar;
}
void DspLog::process_message(int inlet_index, pd::Message *message) {
if (inlet_index == 1) {
if (message->is_float(0)) {
if (message->get_float(0) <= 0.0f) {
graph->print_err("log~ base cannot be set to a non-positive number: %d\n", message->get_float(0));
} else {
invLog2Base = 1.0f/log2f(message->get_float(0));
}
}
}
}
void DspLog::processSignal(DspObject *dspObject, int fromIndex, int toIndex) {
/*
float a[block_sizeInt];
#if __APPLE__
int length = toIndex - fromIndex;
vvlog2f(dspBufferAtOutlet[0]+fromIndex, dspBufferAtInlet[0]+fromIndex, &length);
vvlog2f(a, dspBufferAtInlet[1]+fromIndex, &length);
#else
float *buffer0 = dspBufferAtInlet[0];
float *buffer1 = dspBufferAtInlet[1];
for (int i = fromIndex; i < toIndex; i++) {
dspBufferAtOutlet0[i] = (buffer0[i] <= 0.0f) ? -1000.0f : log2Approx(buffer0[i]);
a[i] = (buffer1[i] <= 0.0f) ? -1000.0f : log2Approx(buffer1[i]);
}
#endif
ArrayArithmetic::divide(dspBufferAtOutlet[0], a, dspBufferAtOutlet[0], fromIndex, toIndex);
*/
}
void DspLog::processScalar(DspObject *dspObject, int fromIndex, int toIndex) {
DspLog *d = reinterpret_cast<DspLog *>(dspObject);
#if __APPLE__
int length = toIndex - fromIndex;
vvlog2f((d->dspBufferAtOutlet[0])+fromIndex, (d->dspBufferAtInlet[0])+fromIndex, &length);
#else
float *buffer = d->dspBufferAtInlet[0];
for (int i = fromIndex; i < toIndex; i++) {
d->dspBufferAtOutlet[0][i] = (buffer[i] <= 0.0f) ? -1000.0f : d->log2Approx(buffer[i]);
}
#endif
ArrayArithmetic::multiply(d->dspBufferAtOutlet[0], d->invLog2Base, d->dspBufferAtOutlet[0], fromIndex, toIndex);
}