internal AudioCapture(AudioDevice audioDevice, string deviceName, int sampleRate, AudioFormat bitDepth, int channels, int bufferSize) : base(audioDevice)
{
if (deviceName != null && !AvailableDevices.Contains(deviceName))
{
throw new InvalidOperationException(string.Format("CaptureDevice \"{0}\" does not exist.", deviceName));
}
if (sampleRate <= 0 || sampleRate >= 44100)
{
throw new ArgumentOutOfRangeException("sampleRate", "SampleRate must be larger than 0 and smaller or equals to 44100.");
}
if (bitDepth != AudioFormat.Byte8 || bitDepth != AudioFormat.Short16)
{
throw new ArgumentException("BitDepth must be either Byte8 oder Short16.", "bitDepth");
}
if (channels <= 0 || channels > 2)
{
throw new ArgumentOutOfRangeException("channels", "AudioCapture only supports 1 or 2 channels.");
}
if (bufferSize <= 0)
{
throw new ArgumentOutOfRangeException("bufferSize", "BufferSize must be larger than 0.");
}
var format = EnumConverter.GetFormat(bitDepth, channels);
this.handle = new AudioCaptureInternal(deviceName, sampleRate, format, bufferSize);
}
public AudioCapture()
{
SampleFormat = ALFormat.Mono16;
BufferLength = 10;
SampleRate = 44100;
source = Observable.Create <Mat>((observer, cancellationToken) =>
{
return(Task.Factory.StartNew(() =>
{
var sampleRate = SampleRate;
var bufferLength = BufferLength;
var sampleFormat = SampleFormat;
var channelCount = SampleFormat == ALFormat.Stereo16 ? 2 : 1;
var bufferSize = (int)Math.Ceiling(sampleRate * bufferLength / 1000);
var readBuffer = sampleFormat == ALFormat.Stereo16 ? new Mat(bufferSize, channelCount, Depth.S16, 1) : null;
var captureInterval = TimeSpan.FromMilliseconds((int)(bufferLength / 2 + 0.5));
var captureBufferSize = bufferSize * 4;
lock (captureLock)
{
using (var capture = new OpenTK.Audio.AudioCapture(DeviceName, sampleRate, sampleFormat, captureBufferSize))
using (var captureSignal = new ManualResetEvent(false))
{
capture.Start();
while (!cancellationToken.IsCancellationRequested)
{
while (capture.AvailableSamples >= bufferSize)
{
var buffer = new Mat(channelCount, bufferSize, Depth.S16, 1);
if (readBuffer != null)
{
capture.ReadSamples(readBuffer.Data, bufferSize);
CV.Transpose(readBuffer, buffer);
}
else
{
capture.ReadSamples(buffer.Data, bufferSize);
}
observer.OnNext(buffer);
}
captureSignal.WaitOne(captureInterval);
}
capture.Stop();
}
}
},
cancellationToken,
TaskCreationOptions.LongRunning,
TaskScheduler.Default));
})
.PublishReconnectable()
.RefCount();
}
/// <summary>
/// コンストラクタ
/// </summary>
public Program(int width, int height, OpenTK.Graphics.GraphicsMode mode, string title) : base(width, height, mode, title)
{
IList <string> devices = OpenTK.Audio.AudioCapture.AvailableDevices;
foreach (string device in devices)
{
Console.WriteLine(device);
}
// オーディオキャプチャ
this.AudioCapture = new OpenTK.Audio.AudioCapture();
this.AudioCapture.Start();
// デバッグ
Console.WriteLine("[INFO] " + this.AudioCapture.AvailableSamples);
Console.WriteLine("[INFO] " + this.AudioCapture.CurrentDevice);
Console.WriteLine("[INFO] " + this.AudioCapture.CurrentError);
Console.WriteLine("[INFO] " + this.AudioCapture.SampleFormat);
Console.WriteLine("[INFO] " + this.AudioCapture.SampleFrequency);
Console.WriteLine("[INFO] Start Audio Capture");
}
