static void Test_WaveWriter()
{
var format = new WaveFormat {
bytesPerSample = 2,
sampleRate = 44100,
channels = 1,
};
byte[] buffer = new byte[format.bytesPerSample * format.sampleRate]; // for 1 sec
string file = "test1.wav";
using (var w = new WaveWriter(format, file))
{
#if false
WaveFormat.Clear(buffer);
w.Write(buffer);
#else
var provider = new PartialProvider();
provider.Initialize(format);
//provider.AddFrequency(440.0, 1500, 0.5f); // without envelope
provider.AddPartial(440, 100, 2000, 0.5f, -4f);
provider.FlushPartials();
while (!provider.IsEmpty())
{
provider.Fill(buffer);
w.Write(buffer);
}
#endif
}
}
static void Test_PartialProvider_DoS()
{
var format = new WaveFormat {
bytesPerSample =
2,
//1, // performing same as 16
sampleRate =
44100,
//22050,
channels = 1
};
using (var engine = new WaveEngine(format, bufferLengthMs: 60))
{
var partialProvider = new PartialProvider();
engine.SetSampleProvider(partialProvider); // Init
engine.Play();
int i = 0;
while (engine.IsPlaying())
{
double freqHz = 440.0 + (i++) * 10;
partialProvider.AddPartial(freqHz, 100, 60000, 0.05f, -2f);
partialProvider.FlushPartials();
Thread.Sleep(50);
}
Debug.WriteLine("Ending. Provider status: {0}", (object)partialProvider.FormatStatus());
}
}
static void AddNote(PartialProvider pp, double cents, Partial[] partials)
{
foreach (Partial p in partials)
{
double c = cents + p.rational.ToCents();
double hz = Partials.CentsToHz(c);
double level = Math.Pow(p.harmonicity, 7.0f);
pp.AddPartial(
hz,
10, (int)(2000 * p.harmonicity),
(float)(level / partials.Length),
-4f
);
}
pp.FlushPartials();
}
static void AddNote(PartialProvider pp, Rational r0)
{
string[] rs = new string[] { "1", "2", "3", "4", "81/16", "6" };
float [] ls = new float [] { 1f, .04f, .8f, .08f, .8f, .1f };
double c0 = r0.ToCents();
for (int i = 0; i < rs.Length; ++i)
{
Rational r = Rational.Parse(rs[i]);
double c = c0 + r.ToCents();
double hz = Partials.CentsToHz(c);
pp.AddPartial(
hz,
10, (int)(2000 * ls[i]),
ls[i] * .1f,
-4f
);
}
pp.FlushPartials();
}
static void Test_PartialProvider()
{
var format = new WaveFormat {
bytesPerSample = 2,
sampleRate = 44100,
channels = 1
};
using (var engine = new WaveEngine(format, bufferLengthMs: 60))
{
var partialProvider = new PartialProvider();
engine.SetSampleProvider(partialProvider); // Initialize called
partialProvider.AddFrequency(440.0 * 2, 2000, 0.5f);
//partialProvider.AddPartial(440.0 * 2, 100, 2000, 0.5f, -2f);
partialProvider.FlushPartials();
engine.Play();
Thread.Sleep(3000);
Debug.WriteLine("Ending. Provider status: {0}", (object)partialProvider.FormatStatus());
}
}
static void Test_PartialProvider_Piano()
{
var format = new WaveFormat {
bytesPerSample = 2,
sampleRate = 44100,
//sampleRate = 22050,
channels = 1,
};
string harmonicity = "Barlow";
Rational[] subgroup = Rational.ParseRationals("2.3.5.11");
Partial[] partials = MakePartials(harmonicity, subgroup, 15);
Debug.WriteLine("Subgroup {0}", Rational.FormatRationals(subgroup));
foreach (Partial p in partials)
{
Debug.WriteLine("Partial {0} harm: {1}", p.rational, p.harmonicity);
}
using (var engine = new WaveEngine(format, bufferLengthMs: 30, restartOnFailure: true))
{
var partialProvider = new PartialProvider();
engine.SetSampleProvider(partialProvider);
engine.Play();
Console.WriteLine("1-9 to play note\nEsc to exit");
while (true)
{
bool playing = true;
while (true)
{
playing = engine.IsPlaying();
if (!playing)
{
break;
}
if (Console.KeyAvailable)
{
break;
}
Thread.Sleep(1); // sleep here
}
if (!playing)
{
break;
}
var k = Console.ReadKey(true);
if (k.Key == ConsoleKey.Escape)
{
break; // engine stopped on dispose
}
else if (ConsoleKey.D1 <= k.Key && k.Key <= ConsoleKey.D9)
{
int n = (int)k.Key - (int)ConsoleKey.D1 + 1; // 1..9
var r = new Rational(1 + n, 2); // 2/2, 3/2, 4/2, 5/2,..
if (k.Modifiers.HasFlag(ConsoleModifiers.Shift))
{
r *= 4;
}
if (k.Modifiers.HasFlag(ConsoleModifiers.Control))
{
r /= 4;
}
//AddNote(partialProvider, r);
AddNote(partialProvider, r.ToCents(), partials);
}
}
Debug.WriteLine("Ending. Provider status: {0}", (object)partialProvider.FormatStatus());
}
}