本文整理汇总了C++中AudioStream::getFrameRate方法的典型用法代码示例。如果您正苦于以下问题：C++ AudioStream::getFrameRate方法的具体用法？C++ AudioStream::getFrameRate怎么用？C++ AudioStream::getFrameRate使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类AudioStream的用法示例。
在下文中一共展示了AudioStream::getFrameRate方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: run
void KeyFinderWorkerThread::run(){
if(!haveParams){
emit failed("No parameters.");
return;
}
// initialise stream and decode file into it
AudioStream* astrm = NULL;
AudioFileDecoder* dec = AudioFileDecoder::getDecoder(filePath.toUtf8().data());
try{
astrm = dec->decodeFile(filePath.toUtf8().data());
}catch(Exception){
delete astrm;
delete dec;
emit failed("Could not decode file.");
return;
}
delete dec;
emit decoded();
// make audio stream monaural
astrm->reduceToMono();
emit madeMono();
// downsample if necessary
if(prefs.getDFactor() > 1){
Downsampler* ds = Downsampler::getDownsampler(prefs.getDFactor(),astrm->getFrameRate(),prefs.getLastFreq());
try{
astrm = ds->downsample(astrm,prefs.getDFactor());
}catch(Exception){
delete astrm;
delete ds;
emit failed("Downsampler failed.");
return;
}
delete ds;
emit downsampled();
}
// start spectrum analysis
SpectrumAnalyser* sa = NULL;
Chromagram* ch = NULL;
sa = SpectrumAnalyserFactory::getInstance()->getSpectrumAnalyser(astrm->getFrameRate(),prefs);
ch = sa->chromagram(astrm);
delete astrm; // note we don't delete the spectrum analyser; it stays in the centralised factory for reuse.
ch->reduceTuningBins(prefs);
emit producedFullChromagram(*ch);
// reduce chromagram
ch->reduceToOneOctave(prefs);
emit producedOneOctaveChromagram(*ch);
// get energy level across track to weight segments
std::vector<float> loudness(ch->getHops());
for(int h=0; h<ch->getHops(); h++)
for(int b=0; b<ch->getBins(); b++)
loudness[h] += ch->getMagnitude(h,b);
// get harmonic change signal
Segmentation* hcdf = Segmentation::getSegmentation(prefs);
std::vector<double> harmonicChangeSignal = hcdf->getRateOfChange(ch,prefs);
emit producedHarmonicChangeSignal(harmonicChangeSignal);
// get track segmentation
std::vector<int> changes = hcdf->getSegments(harmonicChangeSignal,prefs);
changes.push_back(ch->getHops()); // It used to be getHops()-1. But this doesn't crash. So we like it.
// batch output of keychange locations for Beatles experiment
//for(int i=1; i<changes.size(); i++) // don't want the leading zero
// std::cout << filePath.substr(53) << "\t" << std::fixed << std::setprecision(2) << changes[i]*(prefs.getHopSize()/(44100.0/prefs.getDFactor())) << std::endl;
// end experiment output
// get key estimates for segments
KeyClassifier hc(prefs);
std::vector<int> keys(0);
std::vector<float> keyWeights(24);
for(int i=0; i<(signed)changes.size()-1; i++){
std::vector<double> chroma(ch->getBins());
for(int j=changes[i]; j<changes[i+1]; j++)
for(int k=0; k<ch->getBins(); k++)
chroma[k] += ch->getMagnitude(j,k);
int key = hc.classify(chroma);
for(int j=changes[i]; j<changes[i+1]; j++){
keys.push_back(key);
if(key < 24) // ignore parts that were classified as silent
keyWeights[key] += loudness[j];
}
}
keys.push_back(keys[keys.size()-1]); // put last key on again to match length of track
delete ch;
emit producedKeyEstimates(keys);
// get global key
int mostCommonKey = 24;
float mostCommonKeyWeight = 0.0;
for(int i=0; i<(signed)keyWeights.size(); i++){
if(keyWeights[i] > mostCommonKeyWeight){
mostCommonKeyWeight = keyWeights[i];
mostCommonKey = i;
}
}
//.........这里部分代码省略.........