public void TestInit()
{
inputFrame = new AudioFrame(4 * inputFrameSize * 2); // 800 floats, 2 channels
// Generate sine wave of amp 1 and period of 200 (f=0.25) samples into channel 0 and triangle with period 800 and amp 0.1 inopt channel 1
inputFrame.Generate(2, 0,
(Int64 frameIndex, uint channelIndex) =>
{
return(channelIndex == 0 ? (float)Math.Sin(2.0 * Math.PI * frameIndex / 200.0) : (float)(frameIndex % inputFrameSize) / 7990.0f);
}
);
inputFrame.RelativeTime = TimeSpan.FromSeconds(1);
}
public void AudioAnalyzer_Buffer_OverlapAreaIsClear()
{
var sut = new AudioAnalyzer(3200, 2, 48000, 800, 800, 2048, false);
RegisterOutputHandler(sut);
AudioFrame silence = new AudioFrame(4 * 2 * 800);
silence.Generate(2, 0, (frameIndex, channelIndex) => { return(0.0f); });
sut.ProcessInput(silence);
Assert.AreEqual(0.0f, outputFrames.First().Spectrum[0].Sum());
Assert.AreEqual(0.0f, outputFrames.First().Spectrum[1].Sum());
}
void SetupSpectrum(int T)
{
var sut = new AudioAnalyzer(4096, 2, 48000, 1024, 0, 2048, false);
RegisterOutputHandler(sut);
sut.AnalyzerTypes = AnalyzerType.Spectrum;
var sineFrame = new AudioFrame(2048 * sizeof(float));
// Generate signal with 0 channel sine wave of period T
sineFrame.Generate(2, 0,
(frameIndex, channelIndex) =>
{
return(channelIndex == 0 ? (float)Math.Sin(Math.PI * frameIndex / (double)T) : 0.0f);
});
sut.ProcessInput(sineFrame);
}
