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);
}
}
/// <summary>
/// Normalize a file using EBU R128 standard
/// </summary>
/// <param name="inputFile">Input filename</param>
/// <param name="outputFile">Output filename</param>
public static void Normalize(string inputFile, string outputFile)
{
try
{
// Decode
WavReader wavReader = null;
if (Path.GetExtension(inputFile).ToLower() == ".wav")
{
try
{
using (FileStream fileStream = new FileStream(inputFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
wavReader = new WavReader(fileStream, Encoding.Default);
}
}
catch (WavReader.FormatNotSupportedException ex)
{
wavReader = null;
}
}
if (wavReader == null)
{
Stream ffStream;
try
{
ffStream = FFmpegWavPiper.GetS32WavStream(inputFile, FFmpegLogReceived);
}
catch (FFmpegWavPiper.FFmepgNotFoundException)
{
Console.WriteLine("FFmpeg not found. Non-wav files require ffmpeg for decoding support. File skipped.");
return;
}
wavReader = new WavReader(ffStream, Encoding.UTF8);
}
WavReader.FmtChunk fmt = (WavReader.FmtChunk)wavReader.Riff.Chunks["fmt "];
double[][] buffer = wavReader.GetSampleData();
// Normalize
buffer = Normalize(buffer, fmt.SampleRate);
// Encode
WavWriter wavWriter = new WavWriter(buffer, fmt.SampleRate, 0x0003, 32, null, Encoding.Default);
if (wavReader.Riff.Chunks.ContainsKey("LIST"))
{
wavWriter.Infos = ((WavReader.ListChunk)wavReader.Riff.Chunks["LIST"]).Data;
}
else
{
wavWriter.Infos = new System.Collections.Generic.SortedDictionary <string, string>();
}
wavWriter.Infos["ISFT"] = "Build-in codec";
wavWriter.Infos["ITCH"] = "R128Normalization";
wavWriter.Save(outputFile);
Console.WriteLine("File saved: {0}", Path.GetFileNameWithoutExtension(outputFile));
}
catch (Exception ex)
{
Console.WriteLine("An exception has occurred : ");
Console.WriteLine($"{ex.GetType()} : {ex.Message}");
Console.WriteLine(ex.StackTrace);
}
GC.Collect();
}
