public AudioCaptureViewModel()
{
_audioInput = new SharedAudioInput();
_audioInput.DeviceInfoUpdated += (s, e) =>
{
Devices = new ObservableCollection <DeviceInfoViewModel>(
e.DeviceInfo.FindAll(di => true)//di.DataFlow == EDataFlow.eCapture)
.Select(di => new DeviceInfoViewModel(di)));
addMessage("Devices updated");
};
_audioInput.DeviceSelected += (s, e) =>
{
addMessage("Device selected: " + e.Device.FriendlyName);
};
_audioInput.CaptureStarted += (s, e) =>
{
addMessage("Capture started");
};
_audioInput.CaptureStopped += (s, e) =>
{
addMessage("Capture stopped");
if (_wavWriters != null)
{
foreach (var wr in _wavWriters)
{
wr.Close();
}
}
_wavWriters = null;
if (_wavRawWriter != null)
{
_wavRawWriter.Close(); _wavRawWriter = null;
}
if (_writer != null)
{
_writer.Close(); _writer = null;
}
};
_audioInput.DataUpdated += (s, e) =>
{
if (_wavWriters != null)
{
for (int i = 0; i < _wavWriters.Length; i++)
{
_wavWriters[i].Write(e.Data[i]);
}
}
if (_wavRawWriter != null)
{
_wavRawWriter.WriteRawData(e.RawData);
}
if (_writer != null)
{
_writer.Write(e.RawData);
}
};
_audioInput.VolumeChanged += (s, e) =>
{
Volume = e.Master;
};
_audioInput.ErrorOccured += (s, e) =>
{
addMessage(e.Exception.Message);
};
#region initialize commands
StartCaptureCommand = new DelegateCommand(
() =>
{
if (_wavWriters != null)
{
foreach (var wr in _wavWriters)
{
wr.Close();
}
}
_wavWriters = new WaveFileWriter[_audioInput.CapFormat.nChannels];
WAVEFORMATEXTENSIBLE fmt = new WAVEFORMATEXTENSIBLE(_audioInput.CapFormat);
fmt.wFormatTag = WaveFormatTag.WAVE_FORMAT_PCM;
fmt.nChannels = 1;
fmt.wBitsPerSample = 16;
fmt.wValidBitsPerSample = 16;
fmt.nAvgBytesPerSec = (uint)(fmt.nChannels * fmt.nSamplesPerSec * fmt.wBitsPerSample / 8.0);
for (int i = 0; i < _wavWriters.Length; i++)
{
_wavWriters[i] = new WaveFileWriter(fmt.nChannels, (int)fmt.nSamplesPerSec, fmt.wBitsPerSample,
DateTime.Now.ToString("yyyyMMdd-HHmmss") + string.Format("_{0}.wav", i));
}
WAVEFORMATEXTENSIBLE rawFmt = new WAVEFORMATEXTENSIBLE(_audioInput.CapFormat);
_wavRawWriter = new WaveFileWriter(rawFmt.nChannels, (int)rawFmt.nSamplesPerSec, rawFmt.wBitsPerSample,
DateTime.Now.ToString("yyyyMMdd-HHmmss") + "_raw.wav");
_writer = new System.IO.BinaryWriter(new System.IO.FileStream("test.wav", System.IO.FileMode.Create));
_audioInput.StartCapture();
},
() => { return(_selectedDev != null && !_audioInput.Capturing &&
_selectedDev.State == DeviceState.DEVICE_STATE_ACTIVE); });
StopCaptureCommand = new DelegateCommand(
() =>
{
_audioInput.StopCapture();
},
() => { return(SelectedDev != null && _audioInput.Capturing); });
#endregion
Devices = new ObservableCollection <DeviceInfoViewModel>();
_audioInput.UpdateDeviceInfo();
}