private void StartStopSineWave()
{
if (waveOut == null)
{
button1.Content = "Stop Sound";
//string str = channelSelector.Text;
//selectedChannels = Int32.Parse(str);
Console.WriteLine("User Selected Channels: " + selectedChannels);
WaveOutCapabilities outdeviceInfo = WaveOut.GetCapabilities(0);
waveOutChannels = outdeviceInfo.Channels;
waveOut = new WaveOut();
int waveOutDevices = WaveOut.DeviceCount;
for(int i = 0; i< waveOutDevices; i++)
{
outdeviceInfo = WaveOut.GetCapabilities(i);
Console.WriteLine("Device {0}: {1}, {2} channels",
i, outdeviceInfo.ProductName, outdeviceInfo.Channels);
}
List<IWaveProvider> inputs = new List<IWaveProvider>();
frequencies = new List<int>();
centerbins = new List<int>();
//Foutstream = new List<StreamWriter>();
for (int c = 0; c < selectedChannels; c++)
{
inputs.Add(new SineWaveProvider32(18000+c*700, 0.25f, 44100, 1));
frequencies.Add(18000+c*700);
centerbins.Add((int)Math.Round((18000 + c * 700) / 10.768));
Console.WriteLine(centerbins.ElementAt(c));
}
var splitter = new MultiplexingWaveProvider(inputs, selectedChannels);
try
{
waveOut.Init(splitter);
waveOut.Play();
}
catch(System.ArgumentException)
{
Console.WriteLine("Invalid audio channel count. Please select a lower number of audio channels");
}
}
else
{
waveOut.Stop();
waveOut.Dispose();
waveOut = null;
button1.Content = "Generate Sound";
frequencies.Clear();
centerbins.Clear();
//Foutstream.Clear();
}
}
public void InputChannelCountIsCorrect()
{
var input1 = new TestWaveProvider(new WaveFormat(32000, 16, 2));
var input2 = new TestWaveProvider(new WaveFormat(32000, 16, 1));
var mp = new MultiplexingWaveProvider(new IWaveProvider[] { input1, input2 }, 1);
Assert.AreEqual(3, mp.InputChannelCount);
}
public void CorrectOutputFormatIsSetForIeeeFloat()
{
var input1 = new TestWaveProvider(WaveFormat.CreateIeeeFloatWaveFormat(32000, 1));
byte[] expected = new byte[] { 0, 1, 2, 3, 0, 1, 2, 3, 4, 5, 6, 7, 4, 5, 6, 7, 8, 9, 10, 11, 8, 9, 10, 11, };
var mp = new MultiplexingWaveProvider(new IWaveProvider[] { input1 }, 2);
Assert.AreEqual(WaveFormatEncoding.IeeeFloat, mp.WaveFormat.Encoding);
}
public void OneInOneOutShouldCopyWaveFormat()
{
var input1 = new Mock<IWaveProvider>();
var inputWaveFormat = new WaveFormat(32000, 16, 1);
input1.Setup(x => x.WaveFormat).Returns(inputWaveFormat);
var mp = new MultiplexingWaveProvider(new IWaveProvider[] { input1.Object }, 1);
Assert.AreEqual(inputWaveFormat, mp.WaveFormat);
}
public void OneInOneOutShouldCopyInReadMethod()
{
var input1 = new TestWaveProvider(new WaveFormat(32000, 16, 1));
byte[] expected = new byte[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
var mp = new MultiplexingWaveProvider(new IWaveProvider[] { input1 }, 1);
byte[] buffer = new byte[10];
var read = mp.Read(buffer, 0, 10);
Assert.AreEqual(10, read);
Assert.AreEqual(expected, buffer);
}
public void CorrectlyHandlesIeeeFloat()
{
var input1 = new TestWaveProvider(WaveFormat.CreateIeeeFloatWaveFormat(32000, 1));
byte[] expected = new byte[] { 0, 1, 2, 3, 0, 1, 2, 3, 4, 5, 6, 7, 4, 5, 6, 7, 8, 9, 10, 11, 8, 9, 10, 11, };
var mp = new MultiplexingWaveProvider(new IWaveProvider[] { input1 }, 2);
byte[] buffer = new byte[expected.Length];
var read = mp.Read(buffer, 0, expected.Length);
Assert.AreEqual(expected.Length, read);
Assert.AreEqual(expected, buffer);
}
public void OneInTwoOutShouldConvertMonoToStereo()
{
var input1 = new TestWaveProvider(new WaveFormat(32000, 16, 1));
// 16 bit so left right pairs
byte[] expected = new byte[] { 0, 1, 0, 1, 2, 3, 2, 3, 4, 5, 4, 5, 6, 7, 6, 7, 8, 9, 8, 9 };
var mp = new MultiplexingWaveProvider(new IWaveProvider[] { input1 }, 2);
byte[] buffer = new byte[20];
var read = mp.Read(buffer, 0, 20);
Assert.AreEqual(20, read);
Assert.AreEqual(expected, buffer);
}
public void HasConnectInputToOutputMethod()
{
var input1 = new TestWaveProvider(new WaveFormat(32000, 16, 2));
var mp = new MultiplexingWaveProvider(new IWaveProvider[] { input1 }, 1);
mp.ConnectInputToOutput(1, 0);
}
public void StereoInTwoOutShouldCopyStereo()
{
var input1 = new TestWaveProvider(new WaveFormat(32000, 16, 2));
// 4 bytes per pair of samples
byte[] expected = new byte[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };
var mp = new MultiplexingWaveProvider(new IWaveProvider[] { input1 }, 2);
byte[] buffer = new byte[12];
var read = mp.Read(buffer, 0, 12);
Assert.AreEqual(12, read);
Assert.AreEqual(expected, buffer);
}
public void TwoInOneOutShouldCanBeConfiguredToSelectRightChannel()
{
var input1 = new TestWaveProvider(new WaveFormat(32000, 16, 2));
// 16 bit so left right pairs
byte[] expected = new byte[] { 2, 3, 6, 7, 10, 11, 14, 15, 18, 19 };
var mp = new MultiplexingWaveProvider(new IWaveProvider[] { input1 }, 1);
mp.ConnectInputToOutput(1, 0);
byte[] buffer = new byte[10];
var read = mp.Read(buffer, 0, 10);
Assert.AreEqual(10, read);
Assert.AreEqual(expected, buffer);
}
public void ShouldZeroOutBufferIfInputStopsShort()
{
var input1 = new TestWaveProvider(new WaveFormat(32000, 16, 1), 6);
byte[] expected = new byte[] { 0, 1, 2, 3, 4, 5, 0, 0, 0, 0 };
var mp = new MultiplexingWaveProvider(new IWaveProvider[] { input1 }, 1);
byte[] buffer = new byte[10];
for (int n = 0; n < buffer.Length; n++)
{
buffer[n] = 0xFF;
}
var read = mp.Read(buffer, 0, buffer.Length);
Assert.AreEqual(6, read);
Assert.AreEqual(expected, buffer);
}
public void PerformanceTest()
{
var waveFormat = new WaveFormat(32000, 16, 1);
var input1 = new TestWaveProvider(waveFormat);
var input2 = new TestWaveProvider(waveFormat);
var input3 = new TestWaveProvider(waveFormat);
var input4 = new TestWaveProvider(waveFormat);
var mp = new MultiplexingWaveProvider(new IWaveProvider[] { input1, input2, input3, input4 }, 4);
mp.ConnectInputToOutput(0, 3);
mp.ConnectInputToOutput(1, 2);
mp.ConnectInputToOutput(2, 1);
mp.ConnectInputToOutput(3, 0);
byte[] buffer = new byte[waveFormat.AverageBytesPerSecond];
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 ReadReturnsCountIfOneInputHasEndedButTheOtherHasnt()
{
var input1 = new TestWaveProvider(new WaveFormat(32000, 16, 1), 0);
var input2 = new TestWaveProvider(new WaveFormat(32000, 16, 1));
byte[] expected = new byte[] { };
var mp = new MultiplexingWaveProvider(new IWaveProvider[] { input1, input2 }, 1);
byte[] buffer = new byte[10];
var read = mp.Read(buffer, 0, 10);
Assert.AreEqual(10, read);
}
public void TwoMonoInTwoOutShouldCreateStereo()
{
var input1 = new TestWaveProvider(new WaveFormat(32000, 16, 1));
var input2 = new TestWaveProvider(new WaveFormat(32000, 16, 1)) { Position = 100 };
// 4 bytes per pair of samples
byte[] expected = new byte[] { 0, 1, 100, 101, 2, 3, 102, 103, 4, 5, 104, 105, };
var mp = new MultiplexingWaveProvider(new IWaveProvider[] { input1, input2 }, 2);
byte[] buffer = new byte[expected.Length];
var read = mp.Read(buffer, 0, expected.Length);
Assert.AreEqual(expected.Length, read);
Assert.AreEqual(expected, buffer);
}
public void SetSound(byte[] data, WaveFormat sourceFormat)
{
MemoryStream dataStream = new MemoryStream(data);
RawSourceWaveStream wavStream = new RawSourceWaveStream(dataStream, sourceFormat);
WaveStream wavConvertStream = null;
try
{
wavConvertStream = WaveFormatConversionStream.CreatePcmStream(wavStream);
// using a mux, we force all sounds to be 2 channels
MultiplexingWaveProvider sourceProvider = new MultiplexingWaveProvider(new IWaveProvider[] { wavConvertStream }, 2);
int bytesToRead = (int)((wavConvertStream.Length * 2) / wavConvertStream.WaveFormat.Channels);
byte[] rawWaveData = new byte[bytesToRead];
int bytesRead = sourceProvider.Read(rawWaveData, 0, bytesToRead);
Data = rawWaveData;
Format = sourceProvider.WaveFormat;
// clean up
sourceProvider = null;
}
catch
{
Data = data;
Format = sourceFormat;
}
finally
{
if (wavConvertStream != null)
wavConvertStream.Dispose();
wavConvertStream = null;
wavStream.Dispose();
wavStream = null;
dataStream.Dispose();
dataStream = null;
}
}
public void TwoInOneOutShouldSelectLeftChannel()
{
var input1 = new TestWaveProvider(new WaveFormat(32000, 16, 2));
// 16 bit so left right pairs
byte[] expected = new byte[] { 0, 1, 4, 5, 8, 9, 12, 13, 16, 17 };
var mp = new MultiplexingWaveProvider(new IWaveProvider[] { input1 }, 1);
byte[] buffer = new byte[10];
var read = mp.Read(buffer, 0, 10);
Assert.AreEqual(10, read);
Assert.AreEqual(expected, buffer);
}
public void StereoInTwoOutCanBeConfiguredToSwapLeftAndRight()
{
var input1 = new TestWaveProvider(new WaveFormat(32000, 16, 2));
// 4 bytes per pair of samples
byte[] expected = new byte[] { 2, 3, 0, 1, 6, 7, 4, 5, 10, 11, 8, 9, };
var mp = new MultiplexingWaveProvider(new IWaveProvider[] { input1 }, 2);
mp.ConnectInputToOutput(0, 1);
mp.ConnectInputToOutput(1, 0);
byte[] buffer = new byte[12];
var read = mp.Read(buffer, 0, 12);
Assert.AreEqual(12, read);
Assert.AreEqual(expected, buffer);
}
public void ConnectInputToOutputThrowsExceptionForInvalidOutput()
{
var input1 = new TestWaveProvider(new WaveFormat(32000, 16, 2));
var mp = new MultiplexingWaveProvider(new IWaveProvider[] { input1 }, 1);
Assert.Throws<ArgumentException>(() => mp.ConnectInputToOutput(1, 1));
}
public void ReadReturnsZeroIfSingleInputHasReachedEnd()
{
var input1 = new TestWaveProvider(new WaveFormat(32000, 16, 1), 0);
byte[] expected = new byte[] { };
var mp = new MultiplexingWaveProvider(new IWaveProvider[] { input1 }, 1);
byte[] buffer = new byte[10];
var read = mp.Read(buffer, 0, 10);
Assert.AreEqual(0, read);
}
public byte[] Render(float masterVolume)
{
// due to the way NAudio works, the source files must be provided twice.
// this is because all channels are kept in sync by the mux, and the unused
// channel data is discarded. If we tried to use the same source for both
// muxes, it would try to read 2x the data present in the buffer!
// If only we had a way to create separate WaveProviders from within the
// MultiplexingWaveProvider..
try
{
using (MemoryStream sourceLeft = new MemoryStream(Data), sourceRight = new MemoryStream(Data))
{
using (RawSourceWaveStream waveLeft = new RawSourceWaveStream(new IgnoreDisposeStream(sourceLeft), Format), waveRight = new RawSourceWaveStream(new IgnoreDisposeStream(sourceRight), Format))
{
// step 1: separate the stereo stream
MultiplexingWaveProvider demuxLeft = new MultiplexingWaveProvider(new IWaveProvider[] { waveLeft }, 1);
MultiplexingWaveProvider demuxRight = new MultiplexingWaveProvider(new IWaveProvider[] { waveRight }, 1);
demuxLeft.ConnectInputToOutput(0, 0);
demuxRight.ConnectInputToOutput(1, 0);
// step 2: adjust the volume of a stereo stream
VolumeWaveProvider16 volLeft = new VolumeWaveProvider16(demuxLeft);
VolumeWaveProvider16 volRight = new VolumeWaveProvider16(demuxRight);
// note: use logarithmic scale
#if (true)
// log scale is applied to each operation
float volumeValueLeft = (float)Math.Pow(1.0f - Panning, 0.5f);
float volumeValueRight = (float)Math.Pow(Panning, 0.5f);
// ensure 1:1 conversion
volumeValueLeft /= (float)Math.Sqrt(0.5);
volumeValueRight /= (float)Math.Sqrt(0.5);
// apply volume
volumeValueLeft *= (float)Math.Pow(Volume, 0.5f);
volumeValueRight *= (float)Math.Pow(Volume, 0.5f);
// clamp
volumeValueLeft = Math.Min(Math.Max(volumeValueLeft, 0.0f), 1.0f);
volumeValueRight = Math.Min(Math.Max(volumeValueRight, 0.0f), 1.0f);
#else
// log scale is applied to the result of the operations
float volumeValueLeft = (float)Math.Pow(1.0f - Panning, 0.5f);
float volumeValueRight = (float)Math.Pow(Panning, 0.5f);
// ensure 1:1 conversion
volumeValueLeft /= (float)Math.Sqrt(0.5);
volumeValueRight /= (float)Math.Sqrt(0.5);
// apply volume
volumeValueLeft *= Volume;
volumeValueRight *= Volume;
// apply log scale
volumeValueLeft = (float)Math.Pow(volumeValueLeft, 0.5f);
volumeValueRight = (float)Math.Pow(volumeValueRight, 0.5f);
// clamp
volumeValueLeft = Math.Min(Math.Max(volumeValueLeft, 0.0f), 1.0f);
volumeValueRight = Math.Min(Math.Max(volumeValueRight, 0.0f), 1.0f);
#endif
// use linear scale for master volume
volLeft.Volume = volumeValueLeft * masterVolume;
volRight.Volume = volumeValueRight * masterVolume;
// step 3: combine them again
IWaveProvider[] tracks = new IWaveProvider[] { volLeft, volRight };
MultiplexingWaveProvider mux = new MultiplexingWaveProvider(tracks, 2);
// step 4: export them to a byte array
byte[] finalData = new byte[Data.Length];
mux.Read(finalData, 0, finalData.Length);
// cleanup
demuxLeft = null;
demuxRight = null;
volLeft = null;
volRight = null;
mux = null;
return finalData;
}
}
}
catch
{
return Data;
}
}
private void StartStopSineWave()
{
if (waveOut == null)
{
button1.Content = "Stop Sound";
Console.WriteLine("User Selected Channels: " + selectedChannels);
WaveOutCapabilities outdeviceInfo = WaveOut.GetCapabilities(0);
waveOutChannels = outdeviceInfo.Channels;
waveOut = new WaveOut();
int waveOutDevices = WaveOut.DeviceCount;
for (int i = 0; i < waveOutDevices; i++)
{
outdeviceInfo = WaveOut.GetCapabilities(i);
Console.WriteLine("Device {0}: {1}, {2} channels",
i, outdeviceInfo.ProductName, outdeviceInfo.Channels);
}
List<IWaveProvider> inputs = new List<IWaveProvider>();
frequencies = new List<int>();
centerbins = new List<int>();
for (int c = 0; c < selectedChannels; c++)
{
//Original Sine Wave generation
inputs.Add(new SineWaveProvider32(minFrequency + c * frequencyStep, 0.5f, 44100, 1));
frequencies.Add(minFrequency + c * frequencyStep);
centerbins.Add((int)Math.Round((minFrequency + c * frequencyStep) / 10.768));
}
var splitter = new MultiplexingWaveProvider(inputs, selectedChannels);
try
{
waveOut.Init(splitter);
waveOut.Play();
}
catch (System.ArgumentException)
{
Console.WriteLine("Invalid audio channel count. Please select a lower number of audio channels");
}
//Console.WriteLine("Number of Channels: " + wOut.NumberOfBuffers);
Console.WriteLine("Number of Channels: " + waveOut.OutputWaveFormat.Channels);
}
else
{
waveOut.Stop();
waveOut.Dispose();
waveOut = null;
button1.Content = "Start Sound";
frequencies.Clear();
centerbins.Clear();
}
}