public void PerformanceTest()
{
var input1 = new TestSampleProvider(32000, 1);
var input2 = new TestSampleProvider(32000, 1);
var input3 = new TestSampleProvider(32000, 1);
var input4 = new TestSampleProvider(32000, 1);
var mp = new MultiplexingSampleProvider(new ISampleProvider[] { input1, input2, input3, input4 }, 4);
mp.ConnectInputToOutput(0, 3);
mp.ConnectInputToOutput(1, 2);
mp.ConnectInputToOutput(2, 1);
mp.ConnectInputToOutput(3, 0);
float[] buffer = new float[input1.WaveFormat.AverageBytesPerSecond / 4];
Stopwatch s = new Stopwatch();
var duration = s.Time(() =>
{
// read one hour worth of audio
for (int n = 0; n < 60 * 60; n++)
{
mp.Read(buffer, 0, buffer.Length);
}
});
Console.WriteLine("Performance test took {0}ms", duration);
}
private void EnsureReadsExpected(MultiplexingSampleProvider mp, float[] expected)
{
float[] buffer = new float[expected.Length];
var read = mp.Read(buffer, 0, expected.Length);
Assert.AreEqual(expected.Length, read);
Assert.AreEqual(expected, buffer);
}
public void ReadReturnsZeroIfSingleInputHasReachedEnd()
{
var input1 = new TestSampleProvider(32000, 1, 0);
float[] expected = new float[] { };
var mp = new MultiplexingSampleProvider(new ISampleProvider[] { input1 }, 1);
float[] buffer = new float[10];
var read = mp.Read(buffer, 0, buffer.Length);
Assert.AreEqual(0, read);
}
public void ShouldZeroOutBufferIfInputStopsShort()
{
var input1 = new TestSampleProvider(32000, 1, 6);
float[] expected = new float[] { 0, 1, 2, 3, 4, 5, 0, 0, 0, 0 };
var mp = new MultiplexingSampleProvider(new ISampleProvider[] { input1 }, 1);
float[] buffer = new float[10];
for (int n = 0; n < buffer.Length; n++)
{
buffer[n] = 99;
}
var read = mp.Read(buffer, 0, buffer.Length);
Assert.AreEqual(6, read);
Assert.AreEqual(expected, buffer);
}
public int Read(float[] buffer, int offset, int count)
{
return(multiplexer.Read(buffer, offset, count));
}
