public static TimeSpan AudioLength(this Wavefile wave, float level)
{
if (wave == null)
{
throw new ArgumentNullException("wave");
}
if (level < 0 || level > 1)
{
throw new ArgumentOutOfRangeException("level", level, " ");
}
wave.WaitUntilLoaded();
short shLevel = (short)(32767 * level);
int lastPoint = 0;
int i = 0;
foreach (var sample in wave.m_Samples)
{
if (sample.Left <= -shLevel || sample.Left >= shLevel ||
sample.Right <= -shLevel || sample.Right >= shLevel)
{
lastPoint = i;
}
i++;
}
return(TimeSpan.FromSeconds(lastPoint / (double)wave.SampleRate));
}
public static Wavefile Normalise(this Wavefile wave)
{
if (wave == null)
{
throw new ArgumentNullException("wave");
}
Wavefile newWave = new Wavefile();
newWave.m_SampleRate = wave.SampleRate;
newWave.m_Samples = new BlockArray <Sample>(12);
ThreadPool.QueueUserWorkItem(new WaitCallback(delegate
{
wave.WaitUntilLoaded();
int peak = 0;
foreach (var sample in wave.m_Samples)
{
peak = Math.Max(peak, Math.Max(Math.Abs(sample.Left), Math.Abs(sample.Right)));
}
int factor = 256 * 32767 / peak;
Sample[] newSample = new Sample[1];
foreach (var sample in wave.m_Samples)
{
newSample[0] = new Sample((short)((sample.Left * factor) >> 8),
(short)((sample.Right * factor) >> 8));
newWave.m_Samples.Write(newSample);
}
newWave.FinishedLoading = true;
}));
//thread.Start();
return(newWave);
}