public void MonoOverlapAddRectangle()
{
var properties = new AudioProperties(1, 44100, 32, AudioFormat.IEEE);
var sourceStream = new SineGeneratorStream(44100, 440, TimeSpan.FromSeconds(1));
var targetStream = new MemoryWriterStream(new System.IO.MemoryStream(), properties);
// Rectangular window (samples unchanged) with no overlap should just reconstruct the original stream
int windowSize = 100;
int hopSize = 100;
var window = WindowType.Rectangle;
var sw = new StreamWindower(sourceStream, windowSize, hopSize, window);
var ola = new OLA(targetStream, windowSize, hopSize);
var frameBuffer = new float[windowSize];
while (sw.HasNext())
{
sw.ReadFrame(frameBuffer);
ola.WriteFrame(frameBuffer);
}
ola.Flush();
Assert.AreEqual(sourceStream.Length, targetStream.Length);
// Validate ola target stream content
sourceStream.Position = targetStream.Position = 0;
long similarFloats = StreamUtil.CompareFloats(sourceStream, targetStream);
Assert.AreEqual(sourceStream.Length / sourceStream.SampleBlockSize, similarFloats);
}
public void UpdateOLA(string code, OLA newola)
{
using (var context = new DatabaseContext())
{
var input = from ola in context.OLAs
where ola.code.Equals(code)
select ola;
OLA selectedola = (OLA)(input.ToArray <OLA>().Last());
}
}
public void MonoOverlapAddHann()
{
var properties = new AudioProperties(1, 44100, 32, AudioFormat.IEEE);
IAudioStream sourceStream = new SineGeneratorStream(44100, 440, TimeSpan.FromSeconds(1));
IAudioWriterStream targetStream = new MemoryWriterStream(new System.IO.MemoryStream(), properties);
// 50% overlap with a Hann window is an optimal combination, Hann window is optimally uneven with a 1 as middle point
int windowSize = 21;
int hopSize = 11;
var window = WindowType.Hann;
// Adjust source length to window/hop size so no samples remain at the end
// (a potential last incomplete frame is not returned by the stream windower)
// With remaining samples, the source and target length cannot be compared
sourceStream = new CropStream(sourceStream, 0,
sourceStream.Length
- (sourceStream.Length - windowSize * sourceStream.SampleBlockSize)
% (hopSize * sourceStream.SampleBlockSize));
var sw = new StreamWindower(sourceStream, windowSize, hopSize, window);
var ola = new OLA(targetStream, windowSize, hopSize);
var frameBuffer = new float[windowSize];
while (sw.HasNext())
{
sw.ReadFrame(frameBuffer);
ola.WriteFrame(frameBuffer);
}
ola.Flush();
Assert.AreEqual(sourceStream.Length, targetStream.Length);
// Validate ola target stream content
// Crop the streams to ignore windowed start and end when no overlap-add is performed and content definitely differs
var sourceStreamCropped = new CropStream(sourceStream,
hopSize * sourceStream.SampleBlockSize * 2,
sourceStream.Length - hopSize * sourceStream.SampleBlockSize);
var targetStreamCropped = new CropStream(targetStream,
hopSize * sourceStream.SampleBlockSize * 2,
sourceStream.Length - hopSize * sourceStream.SampleBlockSize);
sourceStreamCropped.Position = targetStreamCropped.Position = 0;
long similarFloats = StreamUtil.CompareFloats(sourceStreamCropped, targetStreamCropped);
Assert.AreEqual(sourceStreamCropped.Length / sourceStreamCropped.SampleBlockSize, similarFloats);
}
public void UpdateOla(OLA ola)
{
datalaag.UpdateOla(ola);
}
public void InsertOLA(OLA ola)
{
olas.Add(ola);
dataContext.SaveChanges();
}
public IEnumerable <string> GetOpoOla(OLA ola)
{
return(from OPO in opos.GetAll()
where OPO.id == ola.Id
select OPO.Naam);
}
public void UpdateOla(OLA ola)
{
olas.Update(ola);
dataContext.SaveChanges();
}
public OLA GetSelectedOla()
{
return(ola = (new OLA {
Id = logic.GetOlaByCode(TxtCode.Text).Id, Code = TxtCode.Text, Naam = TxtNaam.Text, Studiepunten = Convert.ToInt32(NudStudiepunten.Value), Opo = logic.GetOPOById(opo.id), docenten = { logic.GetDocentById(docent.Id) }
}));
}
public OLAForm(Manipulations logic, OLA ola)
{
InitializeComponent();
this.logic = logic;
this.ola = ola;
}
