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()); }