static int ChooseDevice(PaLibrary paLibrary)
{
int index;
while (true)
{
Console.Write($"Select Device (0 - {paLibrary.DeviceCount - 1}): ");
if (!int.TryParse(Console.ReadLine(), out index))
{
continue;
}
if (index >= 0 && index < paLibrary.DeviceCount)
{
return(index);
}
}
}
static void Main(string[] args)
{
Console.WriteLine();
Console.WriteLine($"Using PortAudio version:\n {PaLibrary.VersionInfo.versionText}");
Console.WriteLine();
using (var paLibrary = PaLibrary.Initialize())
{
PrintDevices(paLibrary);
double sampleRate = 44100;
var outIndex = ChooseDevice(paLibrary);
var outputParameters = new PaStreamParameters()
{
device = outIndex,
channelCount = 1,
sampleFormat = PaSampleFormat.paFloat32,
suggestedLatency = paLibrary.GetDeviceInfo(outIndex).Value.defaultHighOutputLatency,
hostApiSpecificStreamInfo = IntPtr.Zero
};
var callbackData = new SineCallbackData()
{
osc = new Complex(1, 0),
delta = Complex.Exp(new Complex(0, 440 * 2 * Math.PI / sampleRate))
};
using (var stream = paLibrary.OpenStream(
null, outputParameters,
sampleRate, 512, PaStreamFlags.paNoFlag,
SineCallback, callbackData))
{
stream.SetStreamFinishedCallback(PrintDoneCallback, "stream finished");
stream.StartStream();
Console.WriteLine("Press any key to stop...");
Console.ReadKey();
stream.StopStream();
}
}
}
static void PrintDevices(PaLibrary paLibrary)
{
var deviceCount = paLibrary.DeviceCount;
string[,] data = new string[deviceCount + 1, 6];
data[0, 0] = "#";
data[0, 1] = "#in";
data[0, 2] = "#out";
data[0, 3] = "type";
data[0, 4] = "api";
data[0, 5] = "name";
for (int n = 0; n < deviceCount; n++)
{
var row = n + 1;
var deviceInfo = paLibrary.GetDeviceInfo(n).Value;
var hostApiInfo = paLibrary.GetHostApiInfo(deviceInfo.hostApi).Value;
data[row, 0] = n.ToString();
data[row, 1] = deviceInfo.maxInputChannels.ToString();
data[row, 2] = deviceInfo.maxOutputChannels.ToString();
data[row, 3] = hostApiInfo.type.ToString();
data[row, 4] = hostApiInfo.name;
data[row, 5] = deviceInfo.name;
}
int[] widths = new int[6];
for (int row = 0; row < data.GetLength(0); row++)
{
for (int col = 0; col < data.GetLength(1); col++)
{
if (data[row, col].Length > widths[col])
{
widths[col] = data[row, col].Length;
}
}
}
var sep = " ";
var width = 0;
for (int col = 0; col < widths.Length; col++)
{
width += widths[col];
}
width += sep.Length * (widths.Length - 1);
var head = " Devices ";
head = new String('=', (width - head.Length) / 2) + head;
head += new String('=', width - head.Length);
Console.WriteLine(head);
for (int row = 0; row < data.GetLength(0); row++)
{
for (int col = 0; col < data.GetLength(1); col++)
{
var pad = new String(' ', widths[col] + 1 - data[row, col].Length);
pad += col == data.GetLength(1) - 1 ? "\n" : " ";
Console.Write(data[row, col] + pad);
}
if (row == 0)
{
Console.WriteLine(new String('=', width));
}
}
Console.WriteLine();
}
