AudioSink::AudioSink(long const srate, int const latency, int const periods)
: rbuf_(nearestPowerOf2(srate * latency / ((periods + 1) * 1000)) * periods * 2)
, rateEst_(srate, rbuf_.size() / periods)
, mut_(SDL_CreateMutex())
, bufReadyCond_(SDL_CreateCond())
, failed_(openAudio(srate, rbuf_.size() / 2 / periods, fillBuffer, this) < 0)
{
rbuf_.fill(0);
}
int GData::getAnalysisStepSize(int rate)
{
//int stepSize = settings.getInt("Analysis", "stepSizeValue");
int stepSize = qsettings->value("Analysis/stepSizeValue", 24).toInt();
//QString stepSizeUnit = settings.getString("Analysis", "stepSizeUnit");
QString stepSizeUnit = qsettings->value("Analysis/stepSizeUnit", "milli-seconds").toString();
if(stepSizeUnit.lower() == "milli-seconds") { //convert to samples
stepSize = int(double(stepSize) * double(rate) / 1000.0);
}
//if(settings.getBool("Analysis", "stepSizeRound")) {
if(qsettings->value("Analysis/stepSizeRound", true).toBool()) {
stepSize = toInt(nearestPowerOf2(stepSize));
}
return stepSize;
}
int GData::getAnalysisBufferSize(int rate)
{
//int windowSize = settings.getInt("Analysis", "bufferSizeValue");
int windowSize = qsettings->value("Analysis/bufferSizeValue", 48).toInt();
//QString windowSizeUnit = settings.getString("Analysis", "bufferSizeUnit");
QString windowSizeUnit = qsettings->value("Analysis/bufferSizeUnit", "milli-seconds").toString();
if(windowSizeUnit.lower() == "milli-seconds") { //convert to samples
windowSize = int(double(windowSize) * double(rate) / 1000.0);
}
//if(settings.getBool("Analysis", "bufferSizeRound")) {
if(qsettings->value("Analysis/bufferSizeRound", true).toBool()) {
windowSize = toInt(nearestPowerOf2(windowSize));
}
return windowSize;
}
static unsigned int prescale(unsigned int n)
{
if(n <= 4095)
{
return 0;
}
n = (n * 16)/65536;
if (!isPowerOfTwo(n))
{
n = nearestPowerOf2(n);
}
return (Log2n(n) + 1);
}
