AlgorithmStatus SilenceRate::process() {
EXEC_DEBUG("process()");
AlgorithmStatus status = acquireData();
if (status != OK) return status;
const vector<Real>& frame = _frame.firstToken();
if (frame.empty()) {
throw EssentiaException("SilenceRate: a given input frame was empty, "
"cannot compute the power of an empty frame.");
}
Real power = instantPower(frame);
for (int i=0; i<(int)_outputs.size(); i++) {
Real& output = _outputs[i]->firstToken();
output = power < _thresholds[i]? 1.0 : 0.0;
}
releaseData();
return OK;
}
void SilenceRate::compute() {
const vector<Real>& frame = _frame.get();
Real power = instantPower(frame);
for (int i=0; i<int(_outputs.size()); ++i) {
Real& output = _outputs[i]->get();
output = power < _thresholds[i]? 1.0 : 0.0;
}
}
void Leq::compute() {
const std::vector<Real>& signal = _signal.get();
Real& leq = _leq.get();
if (signal.empty()) {
throw EssentiaException("Leq: input signal is empty");
}
leq = pow2db(instantPower(signal));
}
void StartStopCut::findNonSilentFrame(std::vector<Real> audio,
int& nonSilentFrame, uint lastFrame) {
std::vector<Real> frame;
uint nFrame = 0;
_frameCutter->input("signal").set(audio);
_frameCutter->output("frame").set(frame);
while (nFrame < lastFrame) {
_frameCutter->compute();
// If it was the last one (ie: it was empty), then we're done.
if (!frame.size())
break;
nonSilentFrame = instantPower(frame) > _threshold;
if (nonSilentFrame)
break;
nFrame++;
}
_frameCutter->reset();
}
