public static int Main(string [] args)
{
string device_id = null;
string backend_name = null;
bool raw = false;
string outfile = null;
foreach (var arg in args)
{
switch (arg)
{
case "--raw":
raw = true;
continue;
default:
if (arg.StartsWith("--backend:"))
{
backend_name = arg.Substring(arg.IndexOf(':') + 1);
}
else if (arg.StartsWith("--device:"))
{
device_id = arg.Substring(arg.IndexOf(':') + 1);
}
else
{
outfile = arg;
}
continue;
}
}
var api = new SoundIO();
var backend = backend_name == null ? SoundIOBackend.None : (SoundIOBackend)Enum.Parse(typeof(SoundIOBackend), backend_name);
if (backend == SoundIOBackend.None)
{
api.Connect();
}
else
{
api.ConnectBackend(backend);
}
Console.WriteLine("backend: " + api.CurrentBackend);
api.FlushEvents();
var device = device_id == null?api.GetInputDevice(api.DefaultInputDeviceIndex) :
Enumerable.Range(0, api.InputDeviceCount)
.Select(i => api.GetInputDevice(i))
.FirstOrDefault(d => d.Id == device_id && d.IsRaw == raw);
if (device == null)
{
Console.Error.WriteLine("device " + device_id + " not found.");
return(1);
}
Console.WriteLine("device: " + device.Name);
if (device.ProbeError != 0)
{
Console.Error.WriteLine("Cannot probe device " + device_id + ".");
return(1);
}
var sample_rate = prioritized_sample_rates.First(sr => device.SupportsSampleRate(sr));
var fmt = prioritized_formats.First(f => device.SupportsFormat(f));
var instream = device.CreateInStream();
instream.Format = fmt;
instream.SampleRate = sample_rate;
instream.ReadCallback = (fmin, fmax) => read_callback(instream, fmin, fmax);
instream.OverflowCallback = () => overflow_callback(instream);
instream.Open();
const int ring_buffer_duration_seconds = 30;
int capacity = (int)(ring_buffer_duration_seconds * instream.SampleRate * instream.BytesPerFrame);
ring_buffer = api.CreateRingBuffer(capacity);
var buf = ring_buffer.WritePointer;
instream.Start();
Console.WriteLine("Type CTRL+C to quit by killing process...");
using (var fs = File.OpenWrite(outfile)) {
var arr = new byte [capacity];
unsafe
{
fixed(void *arrptr = arr)
{
for (; ;)
{
api.FlushEvents();
Thread.Sleep(1000);
int fill_bytes = ring_buffer.FillCount;
var read_buf = ring_buffer.ReadPointer;
Buffer.MemoryCopy((void *)read_buf, arrptr, fill_bytes, fill_bytes);
fs.Write(arr, 0, fill_bytes);
ring_buffer.AdvanceReadPointer(fill_bytes);
}
}
}
}
instream.Dispose();
device.RemoveReference();
api.Dispose();
return(0);
}
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);
}
}
static void write_callback(SoundIOOutStream outstream, int frame_count_min, int frame_count_max)
{
SoundIOChannelAreas areas = default(SoundIOChannelAreas);
int frames_left = 0;
int frame_count = 0;
var read_ptr = ring_buffer.ReadPointer;
int fill_bytes = ring_buffer.FillCount;
int fill_count = fill_bytes / outstream.BytesPerFrame;
if (frame_count_min > fill_count)
{
// Ring buffer does not have enough data, fill with zeroes.
frames_left = frame_count_min;
for (; ;)
{
frame_count = frames_left;
if (frame_count <= 0)
{
return;
}
areas = outstream.BeginWrite(ref frame_count);
if (frame_count <= 0)
{
return;
}
var chCount = outstream.Layout.ChannelCount;
for (int frame = 0; frame < frame_count; frame += 1)
{
for (int ch = 0; ch < chCount; ch += 1)
{
var area = areas.GetArea(ch);
// FIXME: there should be more efficient way for memset(ptr, 0);
for (int i = 0; i < outstream.BytesPerSample; i++)
{
Marshal.WriteByte(area.Pointer, 0);
}
area.Pointer += area.Step;
}
}
outstream.EndWrite();
frames_left -= frame_count;
}
}
int read_count = Math.Min(frame_count_max, fill_count);
frames_left = read_count;
while (frames_left > 0)
{
frame_count = frames_left;
areas = outstream.BeginWrite(ref frame_count);
if (frame_count <= 0)
{
break;
}
var chCount = outstream.Layout.ChannelCount;
var copySize = outstream.BytesPerSample;
for (int frame = 0; frame < frame_count; frame += 1)
{
unsafe {
for (int ch = 0; ch < chCount; ch += 1)
{
var area = areas.GetArea(ch);
Buffer.MemoryCopy((void *)read_ptr, (void *)area.Pointer, copySize, copySize);
area.Pointer += area.Step;
read_ptr += outstream.BytesPerSample;
}
}
}
outstream.EndWrite();
frames_left -= frame_count;
}
ring_buffer.AdvanceReadPointer(read_count * outstream.BytesPerFrame);
}