public void Refresh_waveform_when_receiving_earlier_samples_than_before()
{
var ctx = new ContextFor <WaveformDisplayViewModel>();
var sut = ctx.BuildSut();
sut.BackgroundBrush = new SolidColorBrush(Colors.Black);
var color = Colors.Red;
sut.LeftBrush = sut.RightBrush = new SolidColorBrush(color);
sut.WaveformImage = BitmapFactory.New(30, 20);
var uri = new Uri("source://test/");
var w3 = (int)(sut.WaveformImage.Width / 3);
var peaks = Enumerable.Repeat(1f, w3).Select(m => new PeakInfo(-m, m)).ToArray();
sut.Duration = 3;
// 1/3
var e = new PeaksReceivedEvent(uri, 0, 1, peaks);
sut.HandlePeaks(e);
sut.WaveformImage.RectShouldHaveColor(0, 0, w3 - 1, 20, color);
sut.WaveformImage.RectShouldHaveColor(w3, 0, 3 * w3, 20, sut.BackgroundBrush.Color);
// 3/3
e = new PeaksReceivedEvent(uri, 2, 3, peaks);
sut.HandlePeaks(e);
sut.WaveformImage.RectShouldHaveColor(0, 0, w3 - 1, 20, color);
sut.WaveformImage.RectShouldHaveColor(w3, 0, 2 * w3 - 1, 20, sut.BackgroundBrush.Color);
sut.WaveformImage.RectShouldHaveColor(2 * w3, 0, 3 * w3, 20, color);
// 2/3
e = new PeaksReceivedEvent(uri, 1, 2, peaks);
sut.HandlePeaks(e);
sut.WaveformImage.RectShouldHaveColor(0, 0, 2 * w3 - 1, 20, color);
sut.WaveformImage.RectShouldHaveColor(2 * w3, 0, 3 * w3, 20, sut.BackgroundBrush.Color);
}
public void Only_Handle_events_for_same_source()
{
var ctx = new ContextFor <WaveformDisplayViewModel>();
var sut = ctx.BuildSut();
sut.BackgroundBrush = new SolidColorBrush(Colors.Black);
sut.WaveformImage = BitmapFactory.New(20, 20);
var e = new PeaksReceivedEvent(new Uri("source://test/"), 0, 1, new PeakInfo[0]);
sut.Source = new Uri("other://source/");
sut.Handle(e);
sut.WaveformImage.RectShouldHaveColor(0, 0, 20, 20, sut.BackgroundBrush.Color);
}
public void Support_live_tracking()
{
var ctx = new ContextFor <WaveformDisplayViewModel>();
var sut = ctx.BuildSut();
sut.IsLive.Should().BeFalse("innitially not live");
sut.LastWritePosition.Should().Be(0);
var peaks = new[] { new PeakInfo(-1f, 1f) };
var uri = new Uri("channel://1/");
var e = new PeaksReceivedEvent(uri, 0, 1, peaks);
sut.Duration = e.End * 2;
sut.HandlePeaks(e);
sut.IsLive.Should().BeTrue("Receiving partial peaks should activate live tracking");
sut.LastWritePosition.Should().Be(e.End, "last write position should be updated for received peaks");
sut.HandleShift(sut.LastWritePosition);
sut.LastWritePosition.Should().Be(0);
}
public void Handle_samples_and_publish_peaks()
{
var ctx = new ContextFor <SamplesHandlerPeakPublisher>();
var sut = ctx.BuildSut();
sut.Should().BeAssignableTo <IHandle <SamplesReceivedEvent> >();
var events = ctx.For <IEventAggregator>();
events.Received().Subscribe(sut);
var waveFormat = new WaveFormat(8000, 1);
var start = TimeSpan.Zero;
var duration = TimeSpan.FromSeconds(1);
var data = waveFormat.Generate(duration);
var samples = new SamplesReceivedEvent(new Uri("some://uri/"), start, waveFormat, data);
PeaksReceivedEvent actualPeaks = null;
events.When(x => x.PublishOnCurrentThread(Arg.Any <PeaksReceivedEvent>())).Do(x => actualPeaks = x.Arg <PeaksReceivedEvent>());
var peakProvider = ctx.For <IPeakProvider>();
WaveFormat actualWaveformat = null;
byte[] actualData = null;
peakProvider.Sample(Arg.Any <WaveFormat>(), Arg.Any <byte[]>()).Returns(x =>
{
actualWaveformat = x.Arg <WaveFormat>();
actualData = x.Arg <byte[]>();
return(new[] { new PeakInfo(-1, 1) });
});
sut.Handle(samples);
actualPeaks.Source.Should().Be(samples.Source);
actualPeaks.Start.Should().Be(samples.Start.TotalSeconds);
actualPeaks.End.Should().Be((samples.Start + duration).TotalSeconds);
actualWaveformat.Should().BeSameAs(waveFormat);
actualData.Should().BeSameAs(samples.Data);
}
public void Support_auto_play()
{
var ctx = new ContextFor <WaveformViewModel>();
var sut = ctx.BuildSut();
var uri = new Uri("channel://1/");
// set player
var player = Substitute.For <IMediaPlayer>();
player.Source = uri;
sut.PositionProvider = player;
player.CanPlay.Returns(true);
// activate
((IActivate)sut).Activate();
sut.IsActive.Should().BeTrue();
// now, after receiving partial peaks, should start autplaying
var peaks = new[] { new PeakInfo(-1f, 1f) };
var e = new PeaksReceivedEvent(uri, 0, 1, peaks);
sut.Duration = e.End * 2;
sut.HandlePeaks(e);
player.Received().Play();
sut.Position.Should().Be(sut.LastWritePosition - sut.LiveDelta);
player.ClearReceivedCalls();
sut.HandlePeaks(e);
// only play once after activation
player.DidNotReceive().Play();
// deactivate/activate & check autoplay again
((IDeactivate)sut).Deactivate(false);
((IActivate)sut).Activate();
sut.HandlePeaks(e);
player.Received().Play();
sut.Position.Should().Be(sut.LastWritePosition - sut.LiveDelta);
}
public void Handle_live_sample_updates()
{
var ctx = new ContextFor <WaveformDisplayViewModel>();
var sut = ctx.BuildSut();
sut.Should().BeAssignableTo <IHandle <PeaksReceivedEvent> >();
ctx.For <IEventAggregator>().Received().Subscribe(sut);
// |---------- |
// |-------------------|
// | ---------|
sut.BackgroundBrush = new SolidColorBrush(Colors.Black);
sut.LeftBrush = new SolidColorBrush(Colors.Red);
sut.RightBrush = new SolidColorBrush(Colors.Blue);
sut.WaveformImage = BitmapFactory.New(20, 20);
var w2 = (int)(sut.WaveformImage.Width / 2);
var h2 = (int)(sut.WaveformImage.Height / 2);
var peaks = Enumerable.Repeat(1f, 2 * w2).Concat(Enumerable.Repeat(0f, 2 * w2))
.Select(m => new PeakInfo(m - 1f, m)).ToArray();
var e = new PeaksReceivedEvent(new Uri("source://test/"), 0, 2, peaks);
sut.Duration = e.End;
sut.HandlePeaks(e);
// assert the image rendered
sut.WaveformImage.RectShouldHaveColor(1, 1, w2, h2, sut.LeftBrush.Color);
sut.WaveformImage.RectShouldHaveColor(w2 + 1, h2 + 1, 2 * w2, 2 * h2, sut.RightBrush.Color);
sut.WaveformImage.RectShouldHaveColor(1, h2 + 1, w2 - 1, 2 * h2 - 1, sut.BackgroundBrush.Color);
sut.WaveformImage.RectShouldHaveColor(w2 + 1, 1, 2 * w2, h2, sut.BackgroundBrush.Color);
// assert the points are filled
sut.LeftChannel.Take(10).Should().AllBeEquivalentTo(0);
sut.RightChannel.Take(10).Should().AllBeEquivalentTo(h2);
sut.LeftChannel.Skip(10).Take(10).Should().AllBeEquivalentTo(h2);
sut.RightChannel.Skip(10).Take(10).Should().AllBeEquivalentTo(2 * h2);
}
