public void ComputeWaveForm(UInt32 presentationTime)
{
try
{
double timeInSeconds = presentationTime;
timeInSeconds /= 1000;
float[] samples;
using (AsfStream asfStream = new AsfStream(AsfStreamType.asfAudio, ViewModelLocator.MainStatic.FileName, timeInSeconds))
using (AsfAudio asfAudio = new AsfAudio(asfStream))
{
int sampleCountForTwoSeconds = (int) (2 * asfStream.Configuration.AudioSampleRate);
samples = asfAudio.GetSamples(sampleCountForTwoSeconds).Select(sample => sample.Left).ToArray();
}
Dispatcher.BeginInvoke((Action)(() => DrawAudio(samples)));
}
catch (AsfStreamException) { }
}
public void IterateAudioSamples()
{
AsfStream asfStream = new AsfStream(AsfStreamType.asfAudio, testVideoFileName, 1.0, 10.0);
AsfAudio asfAudio = new AsfAudio(asfStream);
int requestedSampleCount = 10000;
int receivedSampleCount = 0;
foreach (AudioSample audioSample in asfAudio.GetSamples(requestedSampleCount))
{
receivedSampleCount++;
}
Assert.AreEqual(requestedSampleCount, receivedSampleCount);
}