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/*
* Copyright 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 "ArrayArithmetic.h"
#include "DspRifft.h"
#include "PdGraph.h"
message::Object *DspRifft::new_object(pd::Message *init_message, PdGraph *graph) {
return new DspRifft(init_message, graph);
}
DspRifft::DspRifft(pd::Message *init_message, PdGraph *graph) : DspObject(0, 2, 0, 1, graph) {
#if __APPLE__
log2n = lrintf(log2f((float) block_sizeInt));
fftSetup = vDSP_create_fftsetup(log2n, kFFTRadix2);
#else
graph->print_err("[rifft~] is not supported on this platform. It is only supported on Apple OS X and iOS platforms.");
#endif // __APPLE__
}
DspRifft::~DspRifft() {
#if __APPLE__
vDSP_destroy_fftsetup(fftSetup);
#endif // __APPLE__
}
void DspRifft::processDspWithIndex(int fromIndex, int toIndex) {
#if __APPLE__
DSPSplitComplex inputVector;
inputVector.realp = dspBufferAtInlet[0];
inputVector.imagp = dspBufferAtInlet[1];
DSPSplitComplex outputVector;
outputVector.realp = dspBufferAtOutlet[0];
outputVector.imagp = (float *) alloca(block_sizeInt*sizeof(float)); // this buffer will not contain any useful data
vDSP_fft_zop(fftSetup, &inputVector, 1, &outputVector, 1, log2n, kFFTDirection_Inverse);
#endif // __APPLE__
}