public static decimal GetLoudness(string fileName, Action <double, double> updateProgress = null)
{
if (Path.GetExtension(fileName) != ".wav")
{
return(defaultLoadness);
}
try {
WavReader wavReader;
using (FileStream fileStream = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.Read))
{
wavReader = new WavReader(fileStream, Encoding.Default);
}
WavReader.FmtChunk fmt = (WavReader.FmtChunk)wavReader.Riff.Chunks["fmt "];
double[][] buffer = wavReader.GetSampleData();
R128LufsMeter r128LufsMeter = new R128LufsMeter();
r128LufsMeter.Prepare(fmt.SampleRate, buffer.Length);
r128LufsMeter.StartIntegrated();
r128LufsMeter.ProcessBuffer(buffer,
(double current, double total) => { updateProgress?.Invoke(current, total); });
r128LufsMeter.StopIntegrated();
// Report input loudness
return(-16 - Convert.ToDecimal(r128LufsMeter.IntegratedLoudness));
}
catch (Exception ex) {
return(defaultLoadness);
}
}