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);
}
public void StereoInTwoOutCanBeConfiguredToSwapLeftAndRight()
{
var input1 = new TestSampleProvider(32000, 2);
float[] expected = new float[] { 1, 0, 3, 2, 5, 4, 7, 6, 9, 8, 11, 10 };
var mp = new MultiplexingSampleProvider(new ISampleProvider[] { input1 }, 2);
mp.ConnectInputToOutput(0, 1);
mp.ConnectInputToOutput(1, 0);
mp.AssertReadsExpected(expected);
}
public void ConnectInputToOutputThrowsExceptionForInvalidOutput()
{
var input1 = new TestSampleProvider(32000, 2);
var mp = new MultiplexingSampleProvider(new ISampleProvider[] { input1 }, 1);
Assert.Throws <ArgumentException>(() => mp.ConnectInputToOutput(1, 1));
}
public void HasConnectInputToOutputMethod()
{
var input1 = new TestSampleProvider(32000, 2);
var mp = new MultiplexingSampleProvider(new ISampleProvider[] { input1 }, 1);
mp.ConnectInputToOutput(1, 0);
}
public void TwoInOneOutShouldCanBeConfiguredToSelectRightChannel()
{
var input1 = new TestSampleProvider(32000, 2);
float[] expected = new float[] { 1, 3, 5, 7, 9, 11, 13, 15, 17, 19 };
var mp = new MultiplexingSampleProvider(new ISampleProvider[] { input1 }, 1);
mp.ConnectInputToOutput(1, 0);
mp.AssertReadsExpected(expected);
}
public AudioSampleBuffer Build()
{
BuildOutputMap();
multiplexer = new MultiplexingSampleProvider(inputs, outputMap.Length);
for (int i = 0; i < outputMap.Length; i++)
{
var input = outputMap[i];
multiplexer.ConnectInputToOutput(input, i);
AudioEngine.Log($" ch: {input} ==> {i}");
}
return(new AudioSampleBuffer(multiplexer.WaveFormat)
{
Processor = this
});
}
public static ISampleProvider AdjustChannelCount(ISampleProvider snd, UInt32 AudioChannelCount)
{
if (AudioChannelCount == 1)
{
if (snd.WaveFormat.Channels == 1)
{
return(snd);
}
return(new MultiChannelToMonoSampleProvider(snd));
}
else if (AudioChannelCount == 2)
{
if (snd.WaveFormat.Channels == 2)
{
return(snd);
}
if (snd.WaveFormat.Channels == 1)
{
return(new MonoToStereoSampleProvider(snd));
}
var sInput = new MultiplexingSampleProvider(new ISampleProvider[] { snd }, 2);
if (snd.WaveFormat.Channels == 6)
{
// 5.1 sound
sInput.ConnectInputToOutput(0, 0); // FRONT-LEFT -> LEFT
sInput.ConnectInputToOutput(1, 1); // FRONT-RIGHT -> RIGHT
sInput.ConnectInputToOutput(2, 0); // CENTRE -> LEFT
sInput.ConnectInputToOutput(2, 1); // CENTRE -> RIGHT
// sInput.ConnectInputToOutput(3, ?); // LFE -> ???
sInput.ConnectInputToOutput(3, 0); // LOW-FREQ -> LEFT
sInput.ConnectInputToOutput(3, 1); // LOW-FREQ -> RIGHT
sInput.ConnectInputToOutput(4, 0); // SURROUND-LEFT -> LEFT
sInput.ConnectInputToOutput(5, 1); // SURROUND-RIGHT -> RIGHT
}
else if (snd.WaveFormat.Channels == 8)
{
// 7.1 sound (assuming standard order, but alternative still goes to same stereo channel)
// L, R, C, LFE, RL, RR, SL, SR
sInput.ConnectInputToOutput(0, 0); // LEFT
sInput.ConnectInputToOutput(1, 1); // RIGHT
sInput.ConnectInputToOutput(2, 0); // CENTRE
sInput.ConnectInputToOutput(2, 1);
sInput.ConnectInputToOutput(3, 0); // LOW-FREQ
sInput.ConnectInputToOutput(3, 1);
sInput.ConnectInputToOutput(4, 0); // REAR-LEFT
sInput.ConnectInputToOutput(5, 1); // REAR-RIGHT
sInput.ConnectInputToOutput(6, 0); // SIDE-LEFT
sInput.ConnectInputToOutput(7, 1); // SIDE-RIGHT
}
else
{
throw new UnsupportedAudioException(I18NString.Lookup("Audio_ChannelConversionFailed"));
}
return(sInput);
}
else if (AudioChannelCount == 6)
{
if (snd.WaveFormat.Channels == 6)
{
return(snd);
}
if (snd.WaveFormat.Channels == 1)
{
return(new MonoToMultiChannelSampleProvider(snd, 6));
}
var sInput = new MultiplexingSampleProvider(new ISampleProvider[] { snd }, 6);
if (snd.WaveFormat.Channels == 8)
{
sInput.ConnectInputToOutput(0, 0);
sInput.ConnectInputToOutput(1, 1);
sInput.ConnectInputToOutput(2, 2);
sInput.ConnectInputToOutput(3, 3);
sInput.ConnectInputToOutput(4, 4);
sInput.ConnectInputToOutput(5, 5);
sInput.ConnectInputToOutput(6, 4);
sInput.ConnectInputToOutput(7, 5);
}
else if (snd.WaveFormat.Channels == 2)
{
sInput.ConnectInputToOutput(0, 0);
sInput.ConnectInputToOutput(1, 1);
sInput.ConnectInputToOutput(0, 2);
sInput.ConnectInputToOutput(1, 2);
sInput.ConnectInputToOutput(0, 3);
sInput.ConnectInputToOutput(1, 3);
sInput.ConnectInputToOutput(0, 4);
sInput.ConnectInputToOutput(1, 5);
}
else
{
throw new UnsupportedAudioException(I18NString.Lookup("Audio_ChannelConversionFailed"));
}
return(sInput);
}
else if (AudioChannelCount == 8)
{
if (snd.WaveFormat.Channels == 8)
{
return(snd);
}
if (snd.WaveFormat.Channels == 1)
{
return(new MonoToMultiChannelSampleProvider(snd, 8));
}
var sInput = new MultiplexingSampleProvider(new ISampleProvider[] { snd }, 8);
if (snd.WaveFormat.Channels == 6)
{
sInput.ConnectInputToOutput(0, 0);
sInput.ConnectInputToOutput(1, 1);
sInput.ConnectInputToOutput(2, 2);
sInput.ConnectInputToOutput(3, 3);
sInput.ConnectInputToOutput(4, 4);
sInput.ConnectInputToOutput(5, 5);
sInput.ConnectInputToOutput(4, 6);
sInput.ConnectInputToOutput(5, 7);
}
else if (snd.WaveFormat.Channels == 2)
{
sInput.ConnectInputToOutput(0, 0);
sInput.ConnectInputToOutput(1, 1);
sInput.ConnectInputToOutput(0, 2);
sInput.ConnectInputToOutput(1, 2);
sInput.ConnectInputToOutput(0, 3);
sInput.ConnectInputToOutput(1, 3);
sInput.ConnectInputToOutput(0, 4);
sInput.ConnectInputToOutput(1, 5);
sInput.ConnectInputToOutput(0, 6);
sInput.ConnectInputToOutput(0, 7);
}
else
{
throw new UnsupportedAudioException(I18NString.Lookup("Audio_ChannelConversionFailed"));
}
return(sInput);
}
else
{
throw new UnsupportedAudioException(I18NString.Lookup("Audio_ChannelConversionFailed"));
}
}