public void Use_full_volume_and_center_balance_on_sampling()
{
var ctx = new ContextFor <NAudioGetWaveform>();
var peakProvider = new PeakProvider();
ctx.Use <IPeakProvider>(peakProvider);
var sut = ctx.BuildSut();
var waveFormat = WaveFormat.CreateIeeeFloatWaveFormat(8000, 1);
using (var buffer = new BufferedWaveStream(waveFormat, TimeSpan.FromSeconds(1)))
using (var waveStream = new WaveProviderEx(buffer))
{
var source = new Uri("my://source/");
ctx.For <IWaveProviderFactory>().Create(source).Returns(waveStream);
waveStream.Position = 40;
waveStream.Volume = 0.5f;
waveStream.Pan = -1f;
var samples = waveFormat.Generate(buffer.BufferDuration, SignalGeneratorType.Square);
buffer.AddSamples(samples, 0, samples.Length);
var waveForm = sut.For(source);
waveForm.Duration.Should().Be(buffer.BufferDuration);
waveForm.Peaks.Should().HaveCount((int)(peakProvider.PeaksPerSecond * buffer.BufferDuration.TotalSeconds));
waveForm.Peaks.All(p => p.Max == 1f && p.Min == -1f).Should().BeTrue();
waveStream.Position.Should().Be(40, "should be restored after sampling");
waveStream.Volume.Should().Be(0.5f);
waveStream.Pan.Should().Be(-1f);
}
}
public void Support_Root_Mean_Square_Filter()
{
PeakProvider.RmsFilter(new[] { 0.5f, 0.5f }).Should().Be(0.5f);
PeakProvider.RmsFilter(new[] { 0.25f, 0.5f, 0.75f, 1f }).Should().BeApproximately(0.684f, 0.001f);
}
public void Support_Average_Filter()
{
PeakProvider.AvgFilter(new[] { -1f, 1f }).Should().Be(0f);
PeakProvider.AvgFilter(new[] { 0.5f, 0.5f }).Should().Be(0.5f);
}
public void Support_MagFilter()
{
PeakProvider.MagFilter(new[] { -1f }).Should().Be(1f);
PeakProvider.MagFilter(new[] { -0.1f, 0.5f }).Should().Be(0.5f);
}
