TEST (AudioDataTest, SliceFromBack) {
KeyFinder::AudioData a;
a.setChannels(1);
a.setFrameRate(1);
KeyFinder::AudioData* b = NULL;
KeyFinder::AudioData* nullPtr = NULL;
ASSERT_THROW(b = a.sliceSamplesFromBack(1), KeyFinder::Exception);
ASSERT_EQ(nullPtr, b);
a.addToFrameCount(10);
ASSERT_THROW(b = a.sliceSamplesFromBack(11), KeyFinder::Exception);
ASSERT_EQ(nullPtr, b);
a.resetIterators();
float v = 0;
while (a.writeIteratorWithinUpperBound()) {
a.setSampleAtWriteIterator(v);
a.advanceWriteIterator();
v += 1.0;
}
ASSERT_NO_THROW(b = a.sliceSamplesFromBack(5));
ASSERT_NE(nullPtr, b);
ASSERT_EQ(5, a.getSampleCount());
ASSERT_EQ(5, b->getSampleCount());
ASSERT_FLOAT_EQ(5.0, b->getSample(0));
ASSERT_FLOAT_EQ(9.0, b->getSample(4));
delete b;
}
TEST (AudioDataTest, SampleInitialisation) {
KeyFinder::AudioData a;
a.addToSampleCount(100);
ASSERT_EQ(100, a.getSampleCount());
// init values
for (int i = 0; i < 100; i++) {
ASSERT_FLOAT_EQ(0.0, a.getSample(i));
}
}
TEST(AudioDataTest, SamplesBasic){
KeyFinder::AudioData a;
a.addToSampleCount(100);
ASSERT_EQ(100, a.getSampleCount());
// init values
for(int i=0; i<100; i++){
ASSERT_EQ(0.0, a.getSample(i));
}
a.setSample(0, 10.0);
ASSERT_EQ(10.0, a.getSample(0));
}
TEST (AudioDataTest, MakeMono) {
KeyFinder::AudioData a;
a.setChannels(2);
a.addToSampleCount(20);
for (int i = 0; i < 10; i++) {
a.setSample(i * 2, 100.0);
}
a.reduceToMono();
ASSERT_EQ(10, a.getSampleCount());
for (int i = 0; i < 10; i++) {
ASSERT_FLOAT_EQ(50.0, a.getSample(i));
}
}
TEST (AudioDataTest, FrameMutator) {
KeyFinder::AudioData a;
a.setChannels(4);
a.addToFrameCount(5);
ASSERT_EQ(5, a.getFrameCount());
ASSERT_EQ(20, a.getSampleCount());
a.setSample(6, 10.0);
ASSERT_FLOAT_EQ(10.0, a.getSample(6));
ASSERT_FLOAT_EQ(10.0, a.getSampleByFrame(1, 2));
a.setSampleByFrame(1, 2, 20.0);
ASSERT_FLOAT_EQ(20.0, a.getSample(6));
ASSERT_FLOAT_EQ(20.0, a.getSampleByFrame(1, 2));
}
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, DownsamplerResamplesNonintegralRelationship) {
KeyFinder::AudioData a;
a.setChannels(1);
a.setFrameRate(100);
a.addToSampleCount(12);
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);
for (unsigned int i = 10; i < 12; i++)
a.setSample(i, 1000.0);
a.downsample(5);
ASSERT_EQ(3, a.getSampleCount());
ASSERT_FLOAT_EQ(100.0, a.getSample(0));
ASSERT_FLOAT_EQ(500.0, a.getSample(1));
// this doesn't make total mathematical sense but I'm taking a shortcut for performance
ASSERT_FLOAT_EQ(1000.0, a.getSample(2));
}
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, ConstructorWorks) {
KeyFinder::AudioData a;
ASSERT_EQ(0, a.getChannels());
ASSERT_EQ(0, a.getFrameRate());
ASSERT_EQ(0, a.getSampleCount());
}