public int processAudio(AudioBuffer ab) {
int dstBuffSize = ab.getSampleCount();
int NN;
FIRFilter ff;
// grab filter and NN
synchronized (lock) {
ff = filt;
NN = N;
}
if (chunk == null || overBuffSize != dstBuffSize * NN) {
overBuffSize = dstBuffSize * NN;
chunk = new AudioBuffer("oversampled", 1, overBuffSize, ab.getSampleRate() * NN);
}
chunk.makeSilence();
src.processAudio(chunk);
ff.processAudio(chunk);
float upa[] = chunk.getChannel(0);
for (int chn = 0; chn < ab.getChannelCount(); chn++) {
float a[] = ab.getChannel(chn);
for (int i = 0; i < dstBuffSize; i++) {
a[i] = upa[NN * i];
}
}
return AUDIO_OK;
}
