public static void WriteToFile(string filename, IWaveSource source, bool deleteFileIfAlreadyExists,
int maxlength = -1)
{
if (deleteFileIfAlreadyExists && File.Exists(filename))
{
File.Delete(filename);
}
int r = 0;
var buffer = new byte[source.WaveFormat.BytesPerSecond];
using (var w = new WaveWriter(filename, source.WaveFormat))
{
int read;
while ((read = source.Read(buffer, 0, buffer.Length)) > 0)
{
w.Write(buffer, 0, read);
r += read;
if (maxlength != -1 && r > maxlength)
{
break;
}
}
}
}
static void Main(string[] args)
{
using (var wasapiCapture = new WasapiLoopbackCapture())
{
wasapiCapture.Initialize();
var wasapiCaptureSource = new SoundInSource(wasapiCapture);
using(var stereoSource = wasapiCaptureSource.ToStereo())
{
//using (var writer = MediaFoundationEncoder.CreateWMAEncoder(stereoSource.WaveFormat, "output.wma"))
using(var writer = new WaveWriter("output.wav", stereoSource.WaveFormat))
{
byte[] buffer = new byte[stereoSource.WaveFormat.BytesPerSecond];
wasapiCaptureSource.DataAvailable += (s, e) =>
{
int read = stereoSource.Read(buffer, 0, buffer.Length);
writer.Write(buffer, 0, read);
};
wasapiCapture.Start();
Console.ReadKey();
wasapiCapture.Stop();
}
}
}
}
public static void WriteToFile(string filename, IWaveSource source, bool deleteIfExists, int maxlength = -1)
{
if (deleteIfExists && File.Exists(filename))
File.Delete(filename);
int read = 0;
int r = 0;
byte[] buffer = new byte[source.WaveFormat.BytesPerSecond];
using (var w = new WaveWriter(filename, source.WaveFormat))
{
while ((read = source.Read(buffer, 0, buffer.Length)) > 0)
{
w.Write(buffer, 0, read);
r += read;
if (maxlength != -1 && r > maxlength)
break;
}
}
}
// ReSharper disable once UnusedParameter.Local
static void Main(string[] args)
{
//choose the capture mode
Console.WriteLine("Select capturing mode:");
Console.WriteLine("- 1: Capture");
Console.WriteLine("- 2: LoopbackCapture");
CaptureMode captureMode = (CaptureMode)ReadInteger(1, 2);
DataFlow dataFlow = captureMode == CaptureMode.Capture ? DataFlow.Capture : DataFlow.Render;
//---
//select the device:
var devices = MMDeviceEnumerator.EnumerateDevices(dataFlow, DeviceState.Active);
if (!devices.Any())
{
Console.WriteLine("No devices found.");
return;
}
Console.WriteLine("Select device:");
for (int i = 0; i < devices.Count; i++)
{
Console.WriteLine("- {0:#00}: {1}", i, devices[i].FriendlyName);
}
int selectedDeviceIndex = ReadInteger(Enumerable.Range(0, devices.Count).ToArray());
var device = devices[selectedDeviceIndex];
//--- choose format
Console.WriteLine("Enter sample rate:");
int sampleRate;
do
{
sampleRate = ReadInteger();
if (sampleRate >= 100 && sampleRate <= 200000)
break;
Console.WriteLine("Must be between 1kHz and 200kHz.");
} while (true);
Console.WriteLine("Choose bits per sample (8, 16, 24 or 32):");
int bitsPerSample = ReadInteger(8, 16, 24, 32);
//note: this sample does not support multi channel formats like surround 5.1,...
//if this is required, the DmoChannelResampler class can be used
Console.WriteLine("Choose number of channels (1, 2):");
int channels = ReadInteger(1, 2);
//---
//start recording
//create a new soundIn instance
using (WasapiCapture soundIn = captureMode == CaptureMode.Capture
? new WasapiCapture()
: new WasapiLoopbackCapture())
{
//optional: set some properties
soundIn.Device = device;
//...
//initialize the soundIn instance
soundIn.Initialize();
//create a SoundSource around the the soundIn instance
//this SoundSource will provide data, captured by the soundIn instance
SoundInSource soundInSource = new SoundInSource(soundIn) {FillWithZeros = false};
//create a source, that converts the data provided by the
//soundInSource to any other format
//in this case the "Fluent"-extension methods are being used
IWaveSource convertedSource = soundInSource
.ChangeSampleRate(sampleRate) // sample rate
.ToSampleSource()
.ToWaveSource(bitsPerSample); //bits per sample
//channels...
using (convertedSource = channels == 1 ? convertedSource.ToMono() : convertedSource.ToStereo())
{
//create a new wavefile
using (WaveWriter waveWriter = new WaveWriter("out.wav", convertedSource.WaveFormat))
{
//register an event handler for the DataAvailable event of
//the soundInSource
//Important: use the DataAvailable of the SoundInSource
//If you use the DataAvailable event of the ISoundIn itself
//the data recorded by that event might won't be available at the
//soundInSource yet
soundInSource.DataAvailable += (s, e) =>
{
//read data from the converedSource
//important: don't use the e.Data here
//the e.Data contains the raw data provided by the
//soundInSource which won't have your target format
byte[] buffer = new byte[convertedSource.WaveFormat.BytesPerSecond / 2];
int read;
//keep reading as long as we still get some data
//if you're using such a loop, make sure that soundInSource.FillWithZeros is set to false
while ((read = convertedSource.Read(buffer, 0, buffer.Length)) > 0)
{
//write the read data to a file
// ReSharper disable once AccessToDisposedClosure
waveWriter.Write(buffer, 0, read);
}
};
//we've set everything we need -> start capturing data
soundIn.Start();
Console.WriteLine("Capturing started ... press any key to stop.");
Console.ReadKey();
soundIn.Stop();
}
}
}
Process.Start("out.wav");
}
void StopCapture(bool cancel)
{
var w = _writer;
_writer = null;
lock (w) w.Dispose();
if (cancel) {
File.Delete(_recordFileName);
_tickList.Clear();
Console.WriteLine("Aborted.");
return;
}
StringBuilder fileContents = new StringBuilder();
long sum = 0;
for (int i = 0; i < _tickList.Count; i++) {
if (i > 0) sum += _tickList[i] - _tickList[i - 1];
fileContents.AppendLine((_tickList[i] - _recordStartTime - _endToEndLatency).ToString());
}
File.WriteAllText(
Path.Combine(_destinationFolder, _recordStartSystemTimestamp.ToString("yyyyddMMHHmmssfff") + ".beats.txt"),
fileContents.ToString()
);
sum = sum / (_tickList.Count - 1);
var bpm = 1 / ((double)sum / 1000 / 10000) * 60;
Console.WriteLine("Average bpm: " + bpm);
_tickList.Clear();
_recordStartTime = 0;
}
void StartCapture()
{
_recordStartSystemTimestamp = DateTime.Now;
_recordFileName = Path.Combine(_destinationFolder, _recordStartSystemTimestamp.ToString("yyyyddMMHHmmssfff") + ".wav");
_writer = new WaveWriter(
_recordFileName,
_capture.WaveFormat
);
}
/// <summary>
/// Capture the audio outputed by the soundcard to a wave file.
/// The sound you ear is recorded and saved to [wavefile].wav
/// </summary>
/// <param name="wavefile">name of the wave file with extension</param>
/// <param name="captureSilence">if true record blank sounds</param>
public void CaptureSpeakersToWave(string wavefile, bool captureSilence)
{
_capture = new WasapiLoopbackCapture();
//initialize the selected device for recording
_capture.Initialize();
//create a wavewriter to write the data to
_waveWriter = new WaveWriter(wavefile, _capture.WaveFormat);
//setup an eventhandler to receive the recorded data
_capture.DataAvailable += (s, e) =>
{
//save the recorded audio
_waveWriter.Write(e.Data, e.Offset, e.ByteCount);
};
//start recording
_capture.Start();
if (captureSilence)
{
CaptureSilence();
}
}
/// <summary>
/// stop audio capture started with CaptureAudioToWave
/// </summary>
public void UnCaptureSpeakersToWave()
{
//Stop silence recording
if (_soundSilenceOut != null)
{
_soundSilenceOut.Stop();
_soundSilenceOut.Dispose();
_soundSilenceSource.Dispose();
_soundSilenceOut = null;
_soundSilenceSource = null;
}
//stop recording
_capture.Stop();
_waveWriter.Dispose();
_waveWriter = null;
_capture.Dispose();
_capture = null;
}
