public void Start()
{
if (_instream == null)
{
throw new Exception("You MUST call Initialize()");
}
_instream.Start();
}
public static int Main(string[] args)
{
string exe = "SoundIORecord";
SoundIoBackend backend = SoundIoBackend.None;
string deviceId = null;
bool isRaw = true;
string outfile = "1.pcm";
SoundIoError err;
for (int i = 0; i < args.Length; i++)
{
string arg = args[i];
if (arg.StartsWith("--"))
{
if (arg.CompareTo("--raw") == 0)
{
isRaw = true;
}
else if (++i > args.Length)
{
return(Usage(exe));
}
else if (arg.CompareTo("--backend") == 0)
{
backend = (SoundIoBackend)Enum.Parse(typeof(SoundIoBackend), args[i]);
}
else if (arg.CompareTo("--device") == 0)
{
deviceId = args[i];
}
else
{
return(Usage(exe));
}
}
else if (outfile == null)
{
outfile = arg;
}
else
{
return(Usage(exe));
}
}
if (outfile == null)
{
return(Usage(exe));
}
using (SoundIO soundIo = new SoundIO())
{
err = (backend == SoundIoBackend.None) ? soundIo.Connect() : soundIo.ConnectBackend(backend);
if (err != SoundIoError.None)
{
Console.Error.WriteLine("Error connecting: {0}.", err.GetErrorMessage());
return(1);
}
soundIo.FlushEvents();
SoundIODevice selectedDevice = null;
if (deviceId != null)
{
foreach (var dev in soundIo)
{
if (dev.Aim == SoundIoDeviceAim.Input && dev.Id.Equals(deviceId) && dev.IsRaw == isRaw)
{
selectedDevice = dev;
break;
}
}
if (selectedDevice == null)
{
Console.Error.WriteLine("Invalid device id: {0}.", deviceId);
return(1);
}
selectedDevice.AddRef(); // Enumerator cleans up itself on dispose
}
else
{
selectedDevice = soundIo.GetDefaultInputDevice();
if (selectedDevice == null)
{
Console.Error.WriteLine("No input devices available.");
return(1);
}
}
Console.WriteLine("Device: {0}.", selectedDevice.Name);
if (selectedDevice.ProbeError != 0)
{
Console.Error.WriteLine("Unable to probe device: {0}.", selectedDevice.ProbeError.GetErrorMessage());
return(1);
}
selectedDevice.SortChannelLayouts();
int sampleRate = prioritizedSampleRates.FirstOrDefault(sr => selectedDevice.SupportsSampleRate(sr));
if (sampleRate == 0)
{
sampleRate = selectedDevice.SampleRates[0].Max;
}
SoundIoFormat fmt = prioritizedFormats.FirstOrDefault(f => selectedDevice.SupportsFormat(f));
if (fmt == SoundIoFormat.Invalid)
{
fmt = selectedDevice.Formats[0];
}
using (SoundIOInStream instream = new SoundIOInStream(selectedDevice))
{
instream.Format = fmt;
instream.SampleRate = sampleRate;
instream.OnReadCallback = ReadCallback;
instream.OnOverflowCallback = OverflowCallback;
err = instream.Open();
if (err != SoundIoError.None)
{
Console.Error.WriteLine("Unable to open input stream: {0}.", err.GetErrorMessage());
return(1);
}
Console.WriteLine("{0} {1}Hz {2} interleaved", instream.Layout.Name, sampleRate, fmt.GetFormatString());
const int ringBufferDurationSeconds = 30;
int capacity = ringBufferDurationSeconds * instream.SampleRate * instream.BytesPerFrame;
SoundIORingBuffer ringBuffer = new SoundIORingBuffer(soundIo, capacity);
instream.UserData = ringBuffer.Handle;
ringBuffers.Add(ringBuffer.Handle, ringBuffer);
err = instream.Start();
if (err != SoundIoError.None)
{
Console.Error.WriteLine("Unable to start input device: {0}.", err.GetErrorMessage());
return(1);
}
Console.WriteLine("Recording data for 10 seconds.");
int timeout = 100;
using (var fs = File.OpenWrite(outfile))
{
byte[] buffer = new byte[capacity];
while (true) // No memory allocations allowed
{
soundIo.FlushEvents();
Thread.Sleep(100);
int fillBytes = ringBuffer.FillCount;
IntPtr readBuf = ringBuffer.ReadPointer;
Marshal.Copy(readBuf, buffer, 0, fillBytes);
fs.Write(buffer, 0, fillBytes);
ringBuffer.AdvanceReadPointer(fillBytes);
if (--timeout <= 0)
{
break;
}
}
}
}
selectedDevice.Release();
return(0);
}
}