public void Start(int deviceIndex = 0, int fftPower = 14, string preLoadWavFile = null)
{
int sampleRate = 8000;
int fftSize = (int)(Math.Pow(2, fftPower));
int tenMinutePixelWidth = 1000;
int samplesInTenMinutes = sampleRate * 10 * 60;
int segmentSize = samplesInTenMinutes / tenMinutePixelWidth;
spec = new Spectrogram.Spectrogram(sampleRate, fftSize, segmentSize);
spec.displaySettings.brightness = 5;
spec.displaySettings.freqLow = 1000;
spec.displaySettings.freqHigh = 1500;
spec.displaySettings.tickSpacingHz = 50;
spec.displaySettings.tickSpacingSec = 30;
formBrightness = new FormBrightness(spec);
formFreqRange = new FormFreqRange(spec);
formFFT = new FormFFT(spec);
pbSpec.Width = tenMinutePixelWidth;
pbSpec.Height = spec.displaySettings.height;
if (preLoadWavFile != null)
{
spec.AddExtend(Tools.ReadWav(preLoadWavFile));
}
else
{
int bitRate = 16;
int channels = 1;
int bufferMilliseconds = 20;
wvin = new NAudio.Wave.WaveInEvent();
wvin.DeviceNumber = deviceIndex;
wvin.WaveFormat = new NAudio.Wave.WaveFormat(sampleRate, bitRate, channels);
wvin.DataAvailable += OnDataAvailable;
wvin.BufferMilliseconds = bufferMilliseconds;
wvin.StartRecording();
}
}