TEST (AudioDataTest, PrependToNew) {
KeyFinder::AudioData a;
KeyFinder::AudioData b;
ASSERT_NO_THROW(a.prepend(b));
ASSERT_EQ(0, a.getChannels());
ASSERT_EQ(0, a.getFrameRate());
b.setChannels(1);
b.setFrameRate(1);
b.addToFrameCount(1);
ASSERT_NO_THROW(a.prepend(b));
ASSERT_EQ(1, a.getChannels());
ASSERT_EQ(1, a.getFrameRate());
ASSERT_EQ(1, a.getFrameCount());
}
KeyFinderResultWrapper keyDetectionProcess(const AsyncFileObject& object){
KeyFinderResultWrapper result;
result.batchRow = object.batchRow;
// initialise stream and decode file into it.
KeyFinder::AudioData* audio = NULL;
AudioFileDecoder* decoder = NULL;
try{
decoder = AudioFileDecoder::getDecoder();
}catch(KeyFinder::Exception& e){
delete decoder;
result.errorMessage = QString(e.what().c_str());
return result;
}
try{
audio = decoder->decodeFile(object.filePath);
delete decoder;
}catch(KeyFinder::Exception& e){
delete audio;
delete decoder;
result.errorMessage = QString(e.what().c_str());
return result;
}
// make audio stream monaural ahead of downsample to reduce load
audio->reduceToMono();
// downsample if necessary
if(object.prefs.getDFactor() > 1){
Downsampler* ds = Downsampler::getDownsampler(object.prefs.getDFactor(),audio->getFrameRate(),object.prefs.getLastFreq());
try{
audio = ds->downsample(audio,object.prefs.getDFactor());
}catch(KeyFinder::Exception& e){
delete audio;
delete ds;
result.errorMessage = QString(e.what().c_str());
return result;
}
delete ds;
}
KeyFinder::KeyFinder* kf = LibKeyFinderSingleton::getInstance()->getKeyFinder();
result.core = kf->findKey(*audio, object.prefs.core);
delete audio;
return result;
}
TEST (LowPassFilterTest, DoesntAlterAudioMetadata) {
KeyFinder::AudioData a;
a.setChannels(1);
a.setFrameRate(frameRate);
a.addToSampleCount(frameRate);
KeyFinder::LowPassFilter* lpf = new KeyFinder::LowPassFilter(filterOrder, frameRate, cornerFrequency, filterFFT);
KeyFinder::Workspace w;
lpf->filter(a, w);
delete lpf;
ASSERT_EQ(1, a.getChannels());
ASSERT_EQ(frameRate, a.getFrameRate());
ASSERT_EQ(frameRate, a.getSampleCount());
}
TEST (AudioDataTest, DownsamplerResamplesIntegralRelationship) {
KeyFinder::AudioData a;
a.setChannels(1);
a.setFrameRate(100);
a.addToSampleCount(10);
for (unsigned int i = 0; i < 5; i++)
a.setSample(i, 100.0);
for (unsigned int i = 5; i < 10; i++)
a.setSample(i, 500.0);
a.downsample(5);
ASSERT_EQ(20, a.getFrameRate());
ASSERT_EQ(2, a.getSampleCount());
ASSERT_FLOAT_EQ(100.0, a.getSample(0));
ASSERT_FLOAT_EQ(500.0, a.getSample(1));
}
TEST (AudioDataTest, DownsamplerResamplesSineWave) {
unsigned int frameRate = 10000;
unsigned int frames = frameRate * 4;
float freq = 20;
float magnitude = 32768.0;
unsigned int factor = 5;
KeyFinder::AudioData a;
a.setChannels(1);
a.setFrameRate(frameRate);
a.addToSampleCount(frames);
for (unsigned int i = 0; i < frames; i++)
a.setSample(i, sine_wave(i, freq, frameRate, magnitude));
a.downsample(factor);
unsigned int newFrameRate = frameRate / factor;
unsigned int newFrames = frames / factor;
ASSERT_EQ(newFrameRate, a.getFrameRate());
ASSERT_EQ(newFrames, a.getSampleCount());
for (unsigned int i = 0; i < newFrames; i++)
ASSERT_NEAR(sine_wave(i, freq, newFrameRate, magnitude), a.getSample(i), magnitude * 0.05);
}
TEST (AudioDataTest, FrameRate) {
KeyFinder::AudioData a;
a.setFrameRate(44100);
ASSERT_EQ(44100, a.getFrameRate());
ASSERT_THROW(a.setFrameRate(0), KeyFinder::Exception);
}
TEST (AudioDataTest, ConstructorWorks) {
KeyFinder::AudioData a;
ASSERT_EQ(0, a.getChannels());
ASSERT_EQ(0, a.getFrameRate());
ASSERT_EQ(0, a.getSampleCount());
}