public WasapiRecorder(Stream stream, int sampleRate, int bitRate, int channels, EncodingFormat format, int preset)
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
if (channels != 1 && channels != 2)
{
throw new ArgumentException(string.Format("Unsupported number of channels {0}", channels), "channels");
}
if (bitRate != 16)
{
throw new ArgumentException(string.Format("Unsupported PCM sample size {0}", bitRate), "bitRate");
}
if (sampleRate < 8000 || sampleRate > 48000)
{
throw new ArgumentException(string.Format("Unsupported Sample Rate {0}", sampleRate), "sampleRate");
}
_stream = stream;
_sampleRate = sampleRate;
_bitRate = bitRate;
_channels = channels;
_format = format;
_preset = preset;
_capture = new AudioCapture();
_capture.SetCaptureFormat(_sampleRate, (ushort)_channels, (ushort)_bitRate);
_size = 0;
_duration = 0;
_state = RecorderState.Unknown;
if (_format == EncodingFormat.Wave)
{
_writer = new WaveWriter(_stream, _sampleRate, _bitRate, _channels);
}
else if (_format == EncodingFormat.MP3)
{
_writer = new Mp3Writer(_stream, _sampleRate, _bitRate, _channels, (LAMEPreset)_preset);
}
_timer = new DispatcherTimer();
_timer.Interval = TimeSpan.FromMilliseconds(33);
_timer.Tick += OnSampleReceived;
}