void KeyAnalysisThread::analyzeSingleKey()
{
DBG("Thread: " << this->getThreadName() << " analyzing single key of: " << fileToAnalyze->getUUID());
//skip already-analyzed files
if (fileToAnalyze->isFileAnalyzed() == "Yes")
{
DBG("Skipping analysis of " << fileToAnalyze->getFileName() << " : Already analyzed.");
return;
}
//DBG("File being analyzed: " << fileToAnalyze.getFileToBeAnalyzed().getFileName());
// r> audioFormatReader = audioFormatManager.createReaderFor(fileToAnalyze.getFileToBeAnalyzed());
size_t numSamples = audioFormatReader->lengthInSamples;
size_t numChannels = audioFormatReader->numChannels;
size_t sampleRate = audioFormatReader->sampleRate;
//size_t numFrames = numSamples / numChannels;
//DBG("Samples:" + String(numSamples) + " Channels:" + String(numChannels) + " Frames:" + String(numFrames));
audioData.addToSampleCount(numSamples*numChannels);
audioData.setChannels(numChannels);
audioData.setFrameRate(sampleRate);
AudioBuffer<float> audioBuffer(numChannels, numSamples);
// #TODO(Casey): Fix either audiobuffer or audioData to allow direct move of sample array (Performance)
// #TODO(Casey): integrate libsndfile as primary choice
//DBG("Reading wav to buffer");
audioFormatReader->read(&audioBuffer, 0, numSamples, 0, true, true);
//DBG("Copying buffer samples to audioData");
for (size_t i = 0; i < numSamples; ++i)
{
//DBG("On sample " + String(i) + " of " + String(numSamples));
for (size_t currChannel = 0; currChannel < numChannels; ++currChannel)
{
audioData.setSampleByFrame(i, currChannel, audioBuffer.getSample(currChannel, i));
}
//audioData.setSampleByFrame(i, 1, audioBuffer.getSample(1, i));
}
//DBG("Detecting key...");
static KeyFinder::KeyFinder keyFinder;
KeyFinder::key_t key = keyFinder.keyOfAudio(audioData);
//KeyFinder::key_t key = KeyFinder::key_t::C_MAJOR;
fileToAnalyze->setDetectedKey(key);
String foundKey(fileToAnalyze->getDetectedKeyAsString());
DBG("Detected key in analyzeAudioFiles: " + foundKey);
}
const char* kfinder_get_key(short signed int *samples,
unsigned int nb_samples,
short unsigned int frame_rate,
short unsigned int nb_channels)
{
// Check input parameter.
if ((samples == NULL) || (nb_samples == 0) || (frame_rate == 0) || (nb_channels == 0))
{
return "";
}
// Build the main computing object.
KeyFinder::KeyFinder k;
// Build an empty audio object
KeyFinder::AudioData a;
// Prepare the object for your audio stream
a.setFrameRate(frame_rate);
a.setChannels(nb_channels);
a.addToSampleCount(nb_samples);
// Copy your audio into the object (as float).
for (unsigned int i = 0; i < nb_samples; i++)
{
a.setSample(i, (float)samples[i]);
}
// Run the analysis
KeyFinder::key_t r;
try
{
r = k.keyOfAudio(a);
}
catch(const std::exception& e)
{
cerr << "libKeyFinder: exception: " << e.what() << endl;
return "";
}
catch(...)
{
cerr << "libKeyFinder: unknown exception" << endl;
return "";
}
// And do something with the result!
switch(r)
{
case KeyFinder::A_MAJOR: return "AM";
case KeyFinder::A_MINOR: return "Am";
case KeyFinder::B_FLAT_MAJOR: return "BbM";
case KeyFinder::B_FLAT_MINOR: return "Bbm";
case KeyFinder::B_MAJOR: return "BM";
case KeyFinder::B_MINOR: return "Bm";
case KeyFinder::C_MAJOR: return "CM";
case KeyFinder::C_MINOR: return "Cm";
case KeyFinder::D_FLAT_MAJOR: return "DbM";
case KeyFinder::D_FLAT_MINOR: return "Dbm";
case KeyFinder::D_MAJOR: return "DM";
case KeyFinder::D_MINOR: return "Dm";
case KeyFinder::E_FLAT_MAJOR: return "EbM";
case KeyFinder::E_FLAT_MINOR: return "Ebm";
case KeyFinder::E_MAJOR: return "EM";
case KeyFinder::E_MINOR: return "Em";
case KeyFinder::F_MAJOR: return "FM";
case KeyFinder::F_MINOR: return "Fm";
case KeyFinder::G_FLAT_MAJOR: return "GbM";
case KeyFinder::G_FLAT_MINOR: return "Gbm";
case KeyFinder::G_MAJOR: return "GM";
case KeyFinder::G_MINOR: return "Gm";
case KeyFinder::A_FLAT_MAJOR: return "AbM";
case KeyFinder::A_FLAT_MINOR: return "Abm";
case KeyFinder::SILENCE: return "";
default: return "";
}
}