public void Init(SoundIODevice device)
{
OutputDevice = device;
if (OutputDevice.ProbeError != 0)
{
throw new Exception($"Probe Error : {OutputDevice.ProbeError}");
}
Console.WriteLine($"Device Name : {OutputDevice.Name}");
outstream = OutputDevice.CreateOutStream();
outstream.WriteCallback = (min, max) => write_callback(outstream, min, max);
outstream.UnderflowCallback = () => underflow_callback(outstream);
outstream.SoftwareLatency = 0;
outstream.SampleRate = Source.Format.SampleRate;
if (OutputDevice.SupportsFormat(SoundIODevice.Float32NE))
{
outstream.Format = SoundIODevice.Float32NE;
}
else
{
outstream.Dispose();
outstream = null;
throw new Exception("No suitable format");
}
outstream.Open();
if (outstream.LayoutErrorMessage != null)
{
Console.WriteLine("Layout Error : " + outstream.LayoutErrorMessage);
}
}
void write_callback(SoundIOOutStream outstream, int frame_count_min, int frame_count_max)
{
int frames_left = frame_count_min;
var writeSize = (int)(Source.Format.SampleRate * WriteLatency);
int frame_count = Math.Max(frames_left, Math.Min(writeSize, frame_count_max));
if (frame_count == 0)
{
return;
}
var results = outstream.BeginWrite(ref frame_count);
SoundIOChannelLayout layout = outstream.Layout;
var buffer = isPaused ? new float[frame_count] : Source.Next(frame_count);
for (int frame = 0; frame < frame_count; frame++)
{
for (int channel = 0; channel < layout.ChannelCount; channel++)
{
var area = results.GetArea(channel);
write_sample(area.Pointer, buffer[frame]);
area.Pointer += area.Step;
}
}
outstream.EndWrite();
}
public void Start()
{
if (State != SynthesizerState.Initial)
{
return;
}
soundio = new SoundIO();
soundio.Connect();
soundio.FlushEvents();
var device = soundio.GetOutputDevice(soundio.DefaultOutputDeviceIndex);
if (device.ProbeError != 0)
{
throw new DX7SynthesizerException($"Cannot probe device {device.Name}.");
}
out_stream = device.CreateOutStream();
if (!device.SupportsFormat(SoundIOFormat.S16LE))
{
throw new NotSupportedException();
}
out_stream.Format = SoundIOFormat.S16LE;
out_stream.WriteCallback = (min, max) => WriteCallback(min, max);
out_stream.UnderflowCallback = () => { Debug.WriteLine("underflow"); };
out_stream.ErrorCallback = () => {
throw new DX7SynthesizerException($"ERROR at libsoundio: {out_stream.LayoutErrorMessage}");
};
out_stream.Open();
State = SynthesizerState.Started;
out_stream.Start();
soundio.FlushEvents();
}
public void Initialize(SoundIODevice device, AudioFormat format)
{
if (format.Channels != 1)
{
throw new OutputInitializationException("Format must qualify channels == 1");
}
Device = device;
Format = format;
var bytesPerSample = format.BitDepth / 8;
var capacity = Format.SampleRate * Format.Channels * bytesPerSample * 30;
ringBuffer = new RingBuffer <float>((uint)capacity);
if (Device.ProbeError != 0)
{
throw new OutputInitializationException($"Probe Error : {Device.ProbeError}");
}
outstream = Device.CreateOutStream();
outstream.WriteCallback = (min, max) => write_callback(outstream, min, max);
outstream.UnderflowCallback = () => underflow_callback(outstream);
outstream.SampleRate = Format.SampleRate;
outstream.SoftwareLatency = DesiredLatency.TotalSeconds;
outstream.Format = SoundIODevice.S16NE;
outstream.Open();
outstream.Layout = SoundIOChannelLayout.GetDefault(Format.Channels);
outstream.SoftwareLatency = DesiredLatency.TotalSeconds;
api.FlushEvents();
ActualLatency = TimeSpan.FromSeconds(outstream.SoftwareLatency);
}
void write_callback(SoundIOOutStream outstream, int frame_count_min, int frame_count_max)
{
int frameCount = frame_count_max;
if (frameCount <= 0)
{
return;
}
var results = outstream.BeginWrite(ref frameCount);
var samples = new float[frameCount];
var e = new OutputBufferEventArgs(frameCount);
Buffer?.Invoke(this, e);
if (e.Buffer != null)
{
ringBuffer.Enqueue(e.Buffer);
}
ringBuffer.Dequeue(samples, frameCount);
var layout = outstream.Layout;
for (int frame = 0; frame < frameCount; frame++)
{
for (int channel = 0; channel < layout.ChannelCount; channel++)
{
var area = results.GetArea(channel);
// Raspberry Piではなぜかshortじゃないと音がプツプツする
write_short_sample(area.Pointer, samples[frame]);
area.Pointer += area.Step;
}
}
outstream.EndWrite();
unsafe void write_short_sample(IntPtr ptr, float sample)
{
short *buf = (short *)ptr;
*buf = (short)(sample * short.MaxValue);
}
unsafe void write_float_sample(IntPtr ptr, float sample)
{
float *buf = (float *)ptr;
*buf = sample;
}
}
void underflow_callback(SoundIOOutStream outstream)
{
Underflow?.Invoke(this, EventArgs.Empty);
}
}
}
static void WriteCallback(SoundIOOutStream stream, int frameCountMin, int frameCountMax)
{
double floatSampleRate = stream.SampleRate;
double secondsPerFrame = 1.0 / floatSampleRate;
SoundIOChannelAreas areas;
SoundIoError err;
int framesLeft = frameCountMax;
while (true)
{
int frameCount = framesLeft;
err = stream.BeginWrite(out areas, ref frameCount);
if (err != SoundIoError.None)
{
throw new SoundIOException(string.Format("Unrecoverable stream error: {0}.", err.GetErrorMessage()));
}
if (areas == null || frameCount == 0)
{
break;
}
SoundIOChannelLayout layout = stream.Layout;
double pitch = 440.0;
double radiansPerSecond = pitch * 2.0 * Math.PI;
for (int frame = 0; frame < frameCount; frame++)
{
double sample = Math.Sin((secondsOffset + frame * secondsPerFrame) * radiansPerSecond);
for (int channel = 0; channel < layout.ChannelCount; channel += 1)
{
writeSample(areas[channel].Pointer, sample);
areas[channel].AdvancePointer();
}
}
secondsOffset = (secondsOffset + secondsPerFrame * frameCount) % 1.0;
err = stream.EndWrite();
if (err != SoundIoError.None)
{
Console.WriteLine("EndWrite failed with error: {0}.", err);
if (err == SoundIoError.Underflow)
{
return;
}
throw new SoundIOException(string.Format("Unrecoverable stream error: {0}.", err.GetErrorMessage()));
}
framesLeft -= frameCount;
if (framesLeft <= 0)
{
break;
}
}
stream.Pause(wantPause);
}
private void SetupOutputStream()
{
_outputStream = _driver.OpenStream(RequestedSampleFormat, RequestedSampleRate, RequestedChannelCount);
_outputStream.WriteCallback += Update;
// TODO: Setup other callbacks (errors, ect).
_outputStream.Open();
}
unsafe void write_callback(SoundIOOutStream outstream, int frame_count_min, int frame_count_max)
{
int frame_count = frame_count_max;
var results = outstream.BeginWrite(ref frame_count);
SoundIOChannelLayout layout = outstream.Layout;
int readBytes = frame_count * outstream.BytesPerFrame;
int readCount = 0;
int tryCount = -1;
int read;
while (readBytes - readCount > 0 && tryCount++ < UnderflowRetryCount)
{
int bufferLength = (int)_ringBuffer.GetLength();
if (bufferLength % outstream.BytesPerSample != 0)
{
bufferLength -= outstream.BytesPerSample - (bufferLength % outstream.BytesPerSample);
}
read = Math.Min(bufferLength, readBytes - readCount);
readCount += read;
byte[] buffer = new byte[read];
_ringBuffer.Dequeue(buffer);
SoundIOChannelArea area;
fixed(byte *buf = buffer)
{
byte *ptr;
for (var i = 0; i < buffer.Length; i += outstream.BytesPerSample * layout.ChannelCount)
{
for (int channel = 0; layout.ChannelCount > channel; channel++)
{
area = results.GetArea(channel);
ptr = (byte *)area.Pointer;
for (int j = 0; j < outstream.BytesPerSample; j++)
{
*ptr = buf[i + j + (channel * outstream.BytesPerSample)];
ptr++;
}
area.Pointer += area.Step;
}
}
}
if (readBytes - readCount > 0)
{
Underflow?.Invoke(this, new UnderflowEventArgs(readBytes - readCount));
}
}
outstream.EndWrite();
}
public void Stop()
{
if (_outstream == null)
{
throw new Exception("SoundioOutput is not initialized");
}
_outstream.Dispose();
_outstream = null;
}
public void Dispose()
{
_outstream?.Dispose();
_outstream = null;
Device?.RemoveReference();
Device = null;
_api?.Disconnect();
_api?.Dispose();
_api = null;
}
static void write_callback(SoundIOOutStream outstream, int frame_count_min, int frame_count_max)
{
double float_sample_rate = outstream.SampleRate;
double seconds_per_frame = 1.0 / float_sample_rate;
int frames_left = frame_count_max;
int frame_count = 0;
for (; ;)
{
frame_count = frames_left;
var results = outstream.BeginWrite(ref frame_count);
if (frame_count == 0)
{
break;
}
SoundIOChannelLayout layout = outstream.Layout;
double pitch = 440.0;
double radians_per_second = pitch * 2.0 * Math.PI;
for (int frame = 0; frame < frame_count; frame += 1)
{
double sample = Math.Sin((seconds_offset + frame * seconds_per_frame) * radians_per_second);
for (int channel = 0; channel < layout.ChannelCount; channel += 1)
{
var area = results.GetArea(channel);
write_sample(area.Pointer, sample);
area.Pointer += area.Step;
}
}
seconds_offset = Math.IEEERemainder(seconds_offset + seconds_per_frame * frame_count, 1.0);
outstream.EndWrite();
frames_left -= frame_count;
if (frames_left <= 0)
{
break;
}
}
outstream.Pause(want_pause);
}
private void initInternal(AudioFormat format)
{
if (Device == null)
{
throw new Exception("No device is selected");
}
if (Device.ProbeError != 0)
{
throw new OutputInitializationException($"Probe Error : {Device.ProbeError}");
}
_outstream = Device.CreateOutStream();
_outstream.WriteCallback = (min, max) => write_callback(_outstream, min, max);
_outstream.UnderflowCallback = () => Underflow?.Invoke(this, new UnderflowEventArgs(null));
_outstream.ErrorCallback = () => UnrecoverableError?.Invoke(this, EventArgs.Empty);
_outstream.SampleRate = format.SampleRate;
_outstream.SoftwareLatency = DesiredLatency.TotalSeconds;
var soundioFormat = Soundio.ToSoundioFormat(format);
_outstream.Format = soundioFormat ?? SoundIOFormat.Invalid;
if (_outstream.LayoutErrorMessage != null)
{
var msg = _outstream.LayoutErrorMessage;
Console.WriteLine($"Channel Layout Error : {msg}");
}
_outstream.Open();
_api.FlushEvents();
Format = Soundio.ToManagedFormat(_outstream.Format, _outstream.SampleRate, _outstream.Layout.ChannelCount);
SoftwareLatency = TimeSpan.FromSeconds(_outstream.SoftwareLatency);
var bytesPerSample = _outstream.BytesPerSample;
var capacity = Format.SampleRate * Format.Channels * bytesPerSample *
_bufferDuration.TotalSeconds;
_ringBuffer = new RingBuffer <byte>((uint)capacity);
}
void WriteCallback(SoundIOOutStream outStream, int min, int max)
{
if (!play_audio)
{
return;
}
Console.WriteLine($"WriteCallback invoked: {min} / {max}");
double float_sample_rate = outStream.SampleRate;
double seconds_per_frame = 1.0 / float_sample_rate;
//if (max - min > samples.Length)
// samples = new short [max - min];
#if test_with_sine
//double seconds_offset = 0;
#else
synth.GetSamples(samples, 0, samples.Length);
#endif
//if (samples.Any (s => s != 0))
// Console.WriteLine (string.Concat (samples.Take (50).Select (s => s.ToString ("X04"))));
int frameRemaining = max;
int frameCount = frameRemaining;
while (play_audio && frameRemaining > 0)
{
var results = outStream.BeginWrite(ref frameCount);
if (frameCount == 0)
{
break;
}
#if test_with_sine
double pitch = 440.0;
double radians_per_second = pitch * 2.0 * Math.PI;
for (int frame = 0; frame < frameCount; frame += 1)
{
double sample = Math.Sin((seconds_offset + frame * seconds_per_frame) * radians_per_second);
for (int channel = 0; channel < outStream.Layout.ChannelCount; channel += 1)
{
var area = results.GetArea(channel);
double range = (double)short.MaxValue - (double)short.MinValue;
double val = sample * range / 2.0;
unsafe { *((short *)area.Pointer) = (short)val; }
area.Pointer += area.Step;
}
}
seconds_offset = Math.IEEERemainder(seconds_offset + seconds_per_frame * frameCount, 1.0);
#else
for (int i = 0; i < outStream.Layout.ChannelCount; i++)
{
var area = results.GetArea(i);
unsafe {
Marshal.Copy(samples, 0, area.Pointer, samples.Length);
area.Pointer += area.Step * samples.Length;
}
}
#endif
outStream.EndWrite();
frameRemaining -= frameCount;
}
}
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);
}
public static int Main(string[] args)
{
string exe = "SoundIOSine";
SoundIoBackend backend = SoundIoBackend.None;
string deviceId = null;
bool raw = false;
string streamName = null;
double latency = 0.0;
int sampleRate = 0;
SoundIoError err;
SoundIODevice device = null;
for (int i = 0; i < args.Length; i++)
{
string arg = args[i];
if (arg.StartsWith("--"))
{
if (arg.CompareTo("--raw") == 0)
{
raw = true;
}
else
{
i++;
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 if (arg.CompareTo("--name") == 0)
{
streamName = args[i];
}
else if (arg.CompareTo("--latency") == 0)
{
latency = double.Parse(args[i]);
}
else if (arg.CompareTo("--sample-rate") == 0)
{
sampleRate = int.Parse(args[i]);
}
else
{
return(Usage(exe));
}
}
}
else
{
return(Usage(exe));
}
}
SoundIO soundIo = new SoundIO();
err = (backend == SoundIoBackend.None) ?
soundIo.Connect() : soundIo.ConnectBackend(backend);
if (err != SoundIoError.None)
{
Console.Error.WriteLine("Unable to connect to backend: {0}.", err.GetErrorMessage());
return(1);
}
Console.WriteLine("Backend: {0}.", soundIo.CurrentBackend);
soundIo.FlushEvents();
if (deviceId != null)
{
foreach (var dev in soundIo)
{
if (dev.Aim == SoundIoDeviceAim.Output && dev.Id.Equals(deviceId) && dev.IsRaw == raw)
{
device = dev;
break;
}
}
if (device == null)
{
Console.Error.WriteLine("Output device not found.");
return(1);
}
device.AddRef(); // Enumerator cleans up itself on dispose
}
else
{
device = soundIo.GetDefaultOutputDevice();
}
Console.WriteLine("Output device: {0}.", device.Name);
if (device.ProbeError != SoundIoError.None)
{
Console.Error.WriteLine("Cannot probe device: {0}.", device.ProbeError.GetErrorMessage());
return(1);
}
SoundIOOutStream outstream = new SoundIOOutStream(device);
outstream.OnWriteCallback = WriteCallback;
outstream.OnUnderflowCallback = UnderflowCallback;
if (streamName != null)
{
outstream.Name = streamName;
}
outstream.SoftwareLatency = latency;
if (sampleRate != 0)
{
outstream.SampleRate = sampleRate;
}
if (device.SupportsFormat(SoundIoFormats.Float32NE))
{
outstream.Format = SoundIoFormats.Float32NE;
writeSample = WriteSampleFloat32NE;
}
else if (device.SupportsFormat(SoundIoFormats.Float64NE))
{
outstream.Format = SoundIoFormats.Float64NE;
writeSample = WriteSampleFloat64NE;
}
else if (device.SupportsFormat(SoundIoFormats.S32NE))
{
outstream.Format = SoundIoFormats.S32NE;
writeSample = WriteSampleS32NE;
}
else if (device.SupportsFormat(SoundIoFormats.S16NE))
{
outstream.Format = SoundIoFormats.S16NE;
writeSample = WriteSampleS16NE;
}
else
{
Console.Error.WriteLine("No suitable format available.");
return(1);
}
err = outstream.Open();
if (err != SoundIoError.None)
{
Console.Error.WriteLine("Unable to open device: {0}.", err.GetErrorMessage());
return(1);
}
Console.WriteLine("Software latency: {0:N6}.", outstream.SoftwareLatency);
Console.WriteLine(
"\t'p' - pause\n" +
"\t'u' - unpause\n" +
"\t'P' - pause from within callback\n" +
"\t'c' - clear buffer\n" +
"\t'q' - quit\n");
if (outstream.LayoutError != SoundIoError.None)
{
Console.Error.WriteLine("Unable to set channel layout: {0}.", outstream.LayoutError.GetErrorMessage());
}
err = outstream.Start();
if (err != SoundIoError.None)
{
Console.Error.WriteLine("Unable to start device {0}.", err.GetErrorMessage());
return(1);
}
while (true)
{
soundIo.FlushEvents();
int c = Console.Read();
if (c == 'p')
{
err = outstream.Pause(true);
Console.Error.WriteLine("Pausing result: {0}.", err.GetErrorMessage());
}
else if (c == 'P')
{
wantPause = true;
}
else if (c == 'u')
{
wantPause = false;
err = outstream.Pause(false);
Console.Error.WriteLine("Unpausing result: {0}.", err.GetErrorMessage());
}
else if (c == 'c')
{
err = outstream.ClearBuffer();
Console.Error.WriteLine("Clear buffer result: {0}.", err.GetErrorMessage());
}
else if (c == 'q')
{
break;
}
else if (c == '\r' || c == '\n')
{
// ignore
}
else
{
Console.Error.WriteLine("Unrecognized command: {0}.", (char)c);
}
}
outstream.Dispose();
device.Release();
soundIo.Dispose();
return(0);
}
static void UnderflowCallback(SoundIOOutStream o)
{
Console.Error.WriteLine("Underflow {0}.", underflowCount++);
}
public static void UnderflowCallback(SoundIOOutStream stream)
{
Console.WriteLine("Underflow");
}
public static int Main(string[] args)
{
int sampleRate;
string filename = null;
SoundIoBackend backend = SoundIoBackend.None;
string deviceId = null;
bool isRaw = false;
SoundIoError err;
try
{
if (args.Length < 1)
{
Usage();
return(1);
}
for (int i = 0; i < args.Length; i++)
{
string arg = args[i];
if (arg.StartsWith("--"))
{
if (++i > args.Length)
{
return(Usage());
}
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());
}
}
else
{
if (File.Exists(args[i]))
{
filename = args[i];
}
else
{
Usage();
return(1);
}
}
}
if (string.IsNullOrEmpty(filename))
{
throw new Exception("Input file name can not null.");
}
}
catch (IndexOutOfRangeException)
{
Usage();
return(1);
}
using (_soundIO = new SoundIO())
{
using (_waveFile = new WaveFileReader(filename))
{
_channels = _waveFile.WaveFormat.Channels;
sampleRate = _waveFile.WaveFormat.SampleRate;
_soundIO.Connect();
_soundIO.FlushEvents();
SoundIODevice device = null;
if (deviceId != null)
{
foreach (var dev in _soundIO)
{
if (dev.Aim == SoundIoDeviceAim.Output && dev.Id.Equals(deviceId) && dev.IsRaw == isRaw)
{
device = dev;
break;
}
}
if (device == null)
{
Console.Error.WriteLine("Output device not found.");
return(1);
}
device.AddRef(); // Enumerator cleans up itself on dispose
}
else
{
device = _soundIO.GetDefaultOutputDevice();
}
Console.WriteLine("Device: {0}.", device.Name);
if (device.ProbeError != SoundIoError.None)
{
Console.WriteLine("Cannot probe device: {0}", device.ProbeError);
return(1);
}
Console.WriteLine("Output device: {0}", device.Name);
if (device.ProbeError != SoundIoError.None)
{
Console.WriteLine("Cannot probe device: {0}", device.ProbeError);
return(1);
}
var outstream = new SoundIOOutStream(device)
{
OnWriteCallback = WriteCallback,
OnUnderflowCallback = UnderflowCallback,
Name = "sio_play",
SampleRate = sampleRate
};
// look for maching layout for wav file...
var foundLayout = false;
foreach (var layout in device.Layouts)
{
if (layout.ChannelCount == _channels)
{
outstream.Layout = layout;
foundLayout = true;
break;
}
}
// TODO: may need to look at endian issues and other formats...
// when paired with NAudioLite, ISampleProvider the conversion to Float32 is automatic.
if (device.SupportsFormat(SoundIoFormats.Float32NE))
{
outstream.Format = SoundIoFormats.Float32NE;
}
else if (device.SupportsFormat(SoundIoFormats.Float64NE))
{
outstream.Format = SoundIoFormats.Float64NE;
}
else if (device.SupportsFormat(SoundIoFormats.S32NE))
{
outstream.Format = SoundIoFormats.S32NE;
}
else if (device.SupportsFormat(SoundIoFormats.S16NE))
{
outstream.Format = SoundIoFormats.S16NE;
}
else
{
Console.WriteLine("No suitable device format available.");
return(1);
}
Console.WriteLine();
Console.WriteLine("Playing file: {0}, Format: {1}", Path.GetFullPath(filename), _waveFile.WaveFormat);
err = outstream.Open();
if (err != SoundIoError.None)
{
Console.WriteLine($"Unable to open device: {err.GetErrorMessage()}, with sample rate: {outstream.LayoutError}");
return(1);
}
if (outstream.LayoutError != SoundIoError.None)
{
Console.WriteLine($"Unable to set channel layout: {err.GetErrorMessage()}");
}
// revisit layout...
// if no suitable layout found
if (!foundLayout)
{
Console.WriteLine("No native channel layout found, Device Channels: {0}, Wav File Channels: {1}, requires sampler...", outstream.Layout.ChannelCount, _channels);
}
// get sample provider that matches outstream.Layout
if (outstream.Layout.ChannelCount == 1)
{
// mono
if (_waveFile.WaveFormat.Channels == 1)
{
_sampleProvider = _waveFile.ToSampleProvider();
}
else
{
_sampleProvider = _waveFile.ToSampleProvider().ToMono();
}
}
else if (outstream.Layout.ChannelCount == 2)
{
//stereo
if (_waveFile.WaveFormat.Channels == 1)
{
_sampleProvider = _waveFile.ToSampleProvider().ToStereo();
}
else
{
_sampleProvider = _waveFile.ToSampleProvider();
}
}
outstream.Start();
_soundIO.OnBackendDisconnect += SoundIo_OnBackendDisconnected;
while (!_fileDone)
{
System.Threading.Thread.Sleep(100);
_soundIO.FlushEvents();
}
System.Threading.Thread.Sleep(500);
if (_fileDone && outstream != null)
{
outstream.Dispose();
outstream = null;
}
Console.WriteLine("End Program");
return(0);
}
}
}
public static void WriteCallback(SoundIOOutStream stream, int frameCountMin, int frameCountMax)
{
SoundIoError err;
DateTime callbackTime = DateTime.Now;
// loop to utilize as much as the frameCountMax as possible
while (frameCountMax > 0)
{
int frameCount = frameCountMax;
if ((err = stream.BeginWrite(out SoundIOChannelAreas areas, ref frameCount)) != SoundIoError.None)
{
Console.WriteLine("unrecoverable stream error: {0}", err.GetErrorMessage());
_fileDone = true;
}
if (frameCount == 0)
{
break;
}
var bufferCount = frameCount * stream.Layout.ChannelCount;
// if buffer is done add silence based on latency to allow stream to complete through
// audio path before stream is Disposed()
if (_waveFile.Position >= _waveFile.Length)
{
if (_startSilence)
{
// windows latency is a little higher (using DateTime to determine the callback time delay)
// and needs to be accoutned for...
_latencySeconds -= (DateTime.Now - callbackTime).TotalMilliseconds / 1000.0;
_silentSamplesRemaining = (int)((stream.SampleRate * stream.Layout.ChannelCount) * _latencySeconds);
_silentSamplesRemaining -= _silentSamplesAlreadySent;
_startSilence = false;
}
int silentBufferSize;
if (_silentSamplesRemaining > bufferCount)
{
silentBufferSize = bufferCount;
_silentSamplesRemaining -= bufferCount;
}
else
{
silentBufferSize = _silentSamplesRemaining;
_silentSamplesRemaining = 0;
}
if (silentBufferSize > 0)
{
// create a new buffer initialized to 0 and copy to native buffer
var silenceBuffer = new float[silentBufferSize];
stream.CopyTo(silenceBuffer, 0, areas, silentBufferSize);
}
if (_silentSamplesRemaining == 0)
{
_fileDone = true;
stream.EndWrite();
stream.Pause(true);
return;
}
// if the remaining audioBuffer will only partially fill the frameCount
// copy the remaining amount and set the startSilence flag to allow
// stream to play to the end.
}
else if (_waveFile.Position + (frameCount * _waveFile.WaveFormat.Channels) >= _waveFile.Length)
{
float[] audioBuffer = new float[bufferCount];
var actualSamplesRead = _sampleProvider.Read(audioBuffer, 0, bufferCount);
stream.CopyTo(audioBuffer, 0, areas, bufferCount);
_silentSamplesAlreadySent = bufferCount - actualSamplesRead;
_latencySeconds = 0.0;
_startSilence = true;
}
else
{
// copy audioBuffer data to native buffer and advance the bufferPos
float[] audioBuffer = new float[bufferCount];
var actualSamplesRead = _sampleProvider.Read(audioBuffer, 0, bufferCount);
stream.CopyTo(audioBuffer, 0, areas, actualSamplesRead);
if (_waveFile.Position >= _waveFile.Length)
{
_latencySeconds = 0.0;
_startSilence = true;
}
}
if ((err = stream.EndWrite()) != SoundIoError.None)
{
if (err == SoundIoError.Underflow)
{
return;
}
Console.WriteLine("Unrecoverable stream error: {0}", err.GetErrorMessage());
_fileDone = true;
}
if (_startSilence)
{
// get actual latency in order to compute number of silent frames
stream.GetLatency(out _latencySeconds);
callbackTime = DateTime.Now;
}
// loop until frameCountMax is used up
frameCountMax -= frameCount;
}
return;
}
static void underflow_callback(SoundIOOutStream outstream)
{
//Console.Error.WriteLine("underflow {0}", underflow_callback_count++);
}
/// <summary>
/// Determines if SoundIO can connect to a supported backend
/// </summary>
/// <returns></returns>
private static bool IsSupportedInternal()
{
SoundIO context = null;
SoundIODevice device = null;
SoundIOOutStream stream = null;
bool backendDisconnected = false;
try
{
context = new SoundIO();
context.OnBackendDisconnect = (i) => {
backendDisconnected = true;
};
context.Connect();
context.FlushEvents();
if (backendDisconnected)
{
return(false);
}
if (context.OutputDeviceCount == 0)
{
return(false);
}
device = FindNonRawDefaultAudioDevice(context);
if (device == null || backendDisconnected)
{
return(false);
}
stream = device.CreateOutStream();
if (stream == null || backendDisconnected)
{
return(false);
}
return(true);
}
catch
{
return(false);
}
finally
{
if (stream != null)
{
stream.Dispose();
}
if (context != null)
{
context.Dispose();
}
}
}
public void Stop()
{
IsRunning = false;
outstream?.Dispose();
outstream = null;
}
