public IObservable <IWaveBuffer> GetStream(RecordDevice device)
{
return
(Observable.Create <IWaveBuffer>(obs =>
{
var disposables = new CompositeDisposable();
var samples = 512;
var timeMs = 20;
var rate = samples * 1000 / timeMs;
var waveIn = new WaveInEvent()
{
DeviceNumber = device.DeviceNumber,
WaveFormat = new WaveFormat(rate, 16, 1),
BufferMilliseconds = timeMs
};
var subscription =
Observable.FromEventPattern <WaveInEventArgs>(
h => waveIn.DataAvailable += h,
h => waveIn.DataAvailable -= h)
.Where(e =>
// Remove events where Buffer is not filled completely.
// This will happen, when recording is stopped.
e.EventArgs.BytesRecorded == e.EventArgs.Buffer.Length)
.Select(e =>
{
var buffer = new WaveBuffer(e.EventArgs.Buffer)
{
ByteBufferCount = e.EventArgs.BytesRecorded
};
return buffer;
})
.Subscribe(obs);
disposables.Add(Disposable.Create(() => waveIn.StopRecording()));
disposables.Add(subscription);
disposables.Add(waveIn);
waveIn.StartRecording();
return disposables;
}));
}
/// <summary>
/// Creates a new synchronizable instance of <see cref="RecordingProvider"/> to be used with an <see cref="IRecorder"/>.
/// </summary>
/// <param name="Device">The Recording Device.</param>
/// <param name="Wf"><see cref="WaveFormat"/> to use.</param>
/// <param name="FrameRate">The <see cref="IRecorder"/>'s FrameRate.</param>
public RecordingProvider(RecordDevice Device, WaveFormat Wf, int FrameRate)
{
WaveFormat = Wf;
BASS.RecordInit(Device.Index);
BASS.CurrentRecordingDevice = Device.Index;
var flags = BassFlags.RecordPause;
if (Wf.Encoding == WaveFormatEncoding.Float && Wf.BitsPerSample == 32)
{
flags |= BassFlags.Float;
}
else if (Wf.Encoding == WaveFormatEncoding.Pcm && Wf.BitsPerSample == 8)
{
flags |= BassFlags.Byte;
}
else if (!(Wf.Encoding == WaveFormatEncoding.Pcm && Wf.BitsPerSample == 16))
{
throw new ArgumentException(nameof(Wf));
}
IsSynchronizable = FrameRate != -1;
if (IsSynchronizable)
{
BASS.RecordingBufferLength = 3000 / FrameRate;
}
_handle = IsSynchronizable ? BASS.RecordStart(Wf.SampleRate, Wf.Channels, flags, BASS.RecordingBufferLength / 3, Procedure, IntPtr.Zero)
: BASS.RecordStart(Wf.SampleRate, Wf.Channels, flags, Procedure);
BASS.ChannelSetSync(_handle, SyncFlags.Free, 0, (H, C, D, U) => RecordingStopped?.Invoke(this, new EndEventArgs(null)));
}
/// <summary>
/// Creates a new instance of <see cref="RecordingProvider"/>.
/// </summary>
/// <param name="Device">The Recording Device.</param>
/// <param name="Wf"><see cref="WaveFormat"/> to use.</param>
public RecordingProvider(RecordDevice Device, WaveFormat Wf)
: this(Device, Wf, -1)
{
}
/// <summary>
/// Creates a new instance of <see cref="RecordingProvider"/> using Default <see cref="WaveFormat"/>.
/// </summary>
/// <param name="Device">The Recording Device.</param>
public RecordingProvider(RecordDevice Device)
: this(Device, new WaveFormat())
{
}
