/// <summary>
/// Resamples data from multiple channels to single one.
/// </summary>
/// <param name="audio">audio with</param>
public static short[] ConvertToMono(IAudioFormat audio)
{
if (audio == null)
{
throw new ArgumentNullException("Argument 'audio' is null.");
}
if (audio.Data == null)
{
throw new ArgumentNullException("Argument 'audio.Data' is null");
}
switch (audio.Channels)
{
case 1:
return(audio.Data);
case 2:
short[] mono = new short[audio.NumOfDataSamples / 2];
for (int i = 0; i < audio.NumOfDataSamples; i += 2) //4 bytes per loop are processed (2 left + 2 right samples)
{
mono[i / 2] = Arithmetics.Average(audio.Data[i], audio.Data[i + 1]);
}
return(mono);
default:
throw new NotImplementedException($"Convert from {audio.Channels} channels to mono is not supported.");
}
}