/// <summary>
/// Construct extractor from sampling rate, frame duration and hop duration (in seconds)
/// </summary>
/// <param name="samplingRate"></param>
protected FeatureExtractor(FeatureExtractorOptions options)
{
if (options.Errors.Count > 0)
{
throw new ArgumentException("Invalid configuration:\r\n" + string.Join("\r\n", options.Errors));
}
SamplingRate = options.SamplingRate;
FrameDuration = options.FrameDuration;
HopDuration = options.HopDuration;
FrameSize = (int)(SamplingRate * FrameDuration);
HopSize = (int)(SamplingRate * HopDuration);
_blockSize = FrameSize;
_preEmphasis = (float)options.PreEmphasis;
_window = options.Window;
if (_window != WindowTypes.Rectangular)
{
_windowSamples = Window.OfType(_window, FrameSize);
}
}
/// <summary>
/// Constructs extractor from configuration <paramref name="options"/>.
/// </summary>
protected FeatureExtractor(FeatureExtractorOptions options)
{
if (options.Errors.Count > 0)
{
throw new ArgumentException("Invalid configuration:\r\n" + string.Join("\r\n", options.Errors));
}
SamplingRate = options.SamplingRate;
if (options.FrameSize > 0) // frame size has priority over frame duration
{
FrameSize = options.FrameSize;
FrameDuration = (double)FrameSize / SamplingRate;
}
else
{
FrameDuration = options.FrameDuration;
FrameSize = (int)Math.Round(SamplingRate * FrameDuration, MidpointRounding.AwayFromZero);
}
if (options.HopSize > 0) // hop size has priority over hop duration
{
HopSize = options.HopSize;
HopDuration = (double)HopSize / SamplingRate;
}
else
{
HopDuration = options.HopDuration;
HopSize = (int)Math.Round(SamplingRate * HopDuration, MidpointRounding.AwayFromZero);
}
_blockSize = FrameSize;
_preEmphasis = (float)options.PreEmphasis;
_window = options.Window;
if (_window != WindowType.Rectangular)
{
_windowSamples = Window.OfType(_window, FrameSize);
}
}
