public void Dispose()
{
_instream?.Dispose();
_instream = null;
Device?.RemoveReference();
Device = null;
_api?.Disconnect();
_api?.Dispose();
}
private void initInternal(AudioFormat format)
{
if (Device == null)
{
throw new Exception("No device is selected");
}
if (Device.ProbeError != 0)
{
throw new Exception($"Probe Error : {Device.ProbeError}");
}
var native = Soundio.ToSoundioFormat(format);
if (!native.HasValue)
{
throw new NotSupportedException("Format is not supported : " + format);
}
_instream = Device.CreateInStream();
_instream.Format = native.Value;
_instream.SampleRate = format.SampleRate;
_instream.ReadCallback = ReadCallback;
_instream.OverflowCallback = () => Overflow?.Invoke(this, EventArgs.Empty);
_instream.ErrorCallback = () => UnrecoverableError?.Invoke(this, EventArgs.Empty);
_instream.SoftwareLatency = DesiredLatency.TotalSeconds;
_instream.Open();
// Open後にチャンネルは設定しないと動作しない模様
if (Device.CurrentLayout.ChannelCount != format.Channels)
{
checkFormatInternal(format, out var channelLayout);
if (!channelLayout.HasValue)
{
throw new NotSupportedException("No suitable channel layout found : " + format.Channels);
}
_instream.Layout = channelLayout.Value;
}
_instream.SoftwareLatency = DesiredLatency.TotalSeconds;
Format = Soundio.ToManagedFormat(_instream.Format, _instream.SampleRate, _instream.Layout.ChannelCount);
SoftwareLatency = TimeSpan.FromSeconds(_instream.SoftwareLatency);
var bytesPerSample = _instream.BytesPerSample;
var capacity = Format.SampleRate * Format.Channels * bytesPerSample *
_bufferDuration.TotalSeconds;
_ringBuffer = new RingBuffer <byte>((uint)capacity);
}
static void ReadCallback(SoundIOInStream instream, int frameCountMin, int frameCountMax)
{
SoundIORingBuffer ringBuffer = ringBuffers[instream.UserData];
SoundIOChannelAreas areas;
SoundIoError err;
IntPtr writePtr = ringBuffer.WritePointer;
int freeBytes = ringBuffer.FreeCount;
int freeCount = freeBytes / instream.BytesPerFrame;
if (frameCountMin > freeCount)
{
throw new SoundIOException("Ring buffer overflow");
}
int writeFrames = Math.Min(freeCount, frameCountMax);
int framesLeft = writeFrames;
while (true)
{
int frameCount = framesLeft;
err = instream.BeginRead(out areas, ref frameCount);
if (err != SoundIoError.None)
{
throw new SoundIOException(string.Format("Begin read error: {0}.", err.GetErrorMessage()));
}
if (frameCount == 0)
{
break;
}
if (areas == null)
{
// Due to an overflow there is a hole. Fill the ring buffer with
// silence for the size of the hole.
int count = frameCount * instream.BytesPerFrame;
for (int i = 0; i < count; i++)
{
Marshal.WriteByte(writePtr + i, 0);
}
}
else
{
int channelCount = instream.Layout.ChannelCount;
int bytesPerSample = instream.BytesPerSample;
for (int frame = 0; frame < frameCount; frame++)
{
for (int ch = 0; ch < channelCount; ch++)
{
unsafe
{
Buffer.MemoryCopy((void *)areas[ch].Pointer, (void *)writePtr, bytesPerSample, bytesPerSample);
}
areas[ch].AdvancePointer();
writePtr += bytesPerSample;
}
}
}
err = instream.EndRead();
if (err != SoundIoError.None)
{
throw new SoundIOException(string.Format("End read error: {0}.", err.GetErrorMessage()));
}
framesLeft -= frameCount;
if (framesLeft <= 0)
{
break;
}
}
int advanceBytes = writeFrames * instream.BytesPerFrame;
ringBuffer.AdvanceWritePointer(advanceBytes);
}
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 OverflowCallback(SoundIOInStream instream)
{
Console.Error.WriteLine("Overflow {0}.", overflowCount++);
}
static void overflow_callback(SoundIOInStream instream)
{
Console.Error.WriteLine("overflow {0}", overflow_callback_count++);
}
static void read_callback(SoundIOInStream instream, int frame_count_min, int frame_count_max)
{
var write_ptr = ring_buffer.WritePointer;
int free_bytes = ring_buffer.FreeCount;
int free_count = free_bytes / instream.BytesPerFrame;
if (frame_count_min > free_count)
{
throw new InvalidOperationException("ring buffer overflow"); // panic()
}
int write_frames = Math.Min(free_count, frame_count_max);
int frames_left = write_frames;
for (; ;)
{
int frame_count = frames_left;
var areas = instream.BeginRead(ref frame_count);
if (frame_count == 0)
{
break;
}
if (areas.IsEmpty)
{
// Due to an overflow there is a hole. Fill the ring buffer with
// silence for the size of the hole.
for (int i = 0; i < frame_count * instream.BytesPerFrame; i++)
{
Marshal.WriteByte(write_ptr + i, 0);
}
Console.Error.WriteLine("Dropped {0} frames due to internal overflow", frame_count);
}
else
{
for (int frame = 0; frame < frame_count; frame += 1)
{
int chCount = instream.Layout.ChannelCount;
int copySize = instream.BytesPerSample;
unsafe {
for (int ch = 0; ch < chCount; ch += 1)
{
var area = areas.GetArea(ch);
Buffer.MemoryCopy((void *)area.Pointer, (void *)write_ptr, copySize, copySize);
area.Pointer += area.Step;
write_ptr += copySize;
}
}
}
}
instream.EndRead();
frames_left -= frame_count;
if (frames_left <= 0)
{
break;
}
}
int advance_bytes = write_frames * instream.BytesPerFrame;
ring_buffer.AdvanceWritePointer(advance_bytes);
}