public WmvVideoStream(string filepath)
{
this.filepath = filepath;
asf = new AsfFile(filepath);
var audioStream = new AsfStream(asf, AsfStreamType.asfAudio, 0);
soundStream = new AsfAudio(audioStream).GetWaveStream();
video = new AsfImageLoader(asf);
}
public WmaMusicStream(string filepath)
{
this.filepath = filepath;
var asf = new AsfFile(filepath);
Channels = asf.PacketConfiguration.AudioChannels;
Samplerate = (int)asf.PacketConfiguration.AudioSampleRate;
LengthInSeconds = (float)asf.PacketConfiguration.Duration;
asf.Open();
soundStream = new AsfAudio(new AsfStream(asf, AsfStreamType.asfAudio, 0)).GetWaveStream();
asf.Close();
}
public void CreatePlayableWaveMemoryStreamManual()
{
//WaveStreamFromFile
using(AsfStream asfStream = new AsfStream(AsfStreamType.asfAudio, testVideoFileName, 1.0, 4.0))
using (AsfAudio asfAudio = new AsfAudio(asfStream))
{
WaveMemoryStream waveMemoryStream = asfAudio.GetWaveStream();
Assert.IsNotNull(waveMemoryStream);
//Soundplayer will throw an exception if this is not a valid Wave stream
SoundPlayer soundPlayer = new SoundPlayer(waveMemoryStream);
}
}
private void WaveFormPlayButton_Click(object sender, RoutedEventArgs e)
{
try
{
double timeInSeconds = (double)startTimeOffset / 1000;
using(AsfStream asfStream = new AsfStream(AsfStreamType.asfAudio, ViewModelLocator.MainStatic.FileName, timeInSeconds))
using (AsfAudio asfAudio = new AsfAudio(asfStream))
{
//play a two second sample
byte[] data = asfAudio.GetSampleBytes(2 * (int) asfStream.Configuration.AudioSampleRate * asfStream.Configuration.AudioChannels);
WaveMemoryStream mwav = new WaveMemoryStream(data, (int)asfStream.Configuration.AudioSampleRate, asfStream.Configuration.AudioBitsPerSample, asfStream.Configuration.AudioChannels);
SoundPlayer sp = new SoundPlayer(mwav);
sp.Play();
}
}
catch (AsfStreamException) { }
}
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 static WaveMemoryStream FromFile(string fileName, double startOffset, double endOffset)
{
using (AsfStream asfStream = new AsfStream(AsfStreamType.asfAudio, fileName, startOffset, endOffset))
using (AsfAudio asfAudio = new AsfAudio(asfStream))
return asfAudio.GetWaveStream();
}
public static WaveMemoryStream FromFile(string fileName, double startOffset, double endOffset)
{
using (AsfStream asfStream = new AsfStream(AsfStreamType.asfAudio, fileName, startOffset, endOffset))
using (AsfAudio asfAudio = new AsfAudio(asfStream))
return(asfAudio.GetWaveStream());
}
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);
}
public void GetAudioSamples()
{
AsfStream asfStream = new AsfStream(AsfStreamType.asfAudio, testVideoFileName, 1.0, 10.0);
AsfAudio asfAudio = new AsfAudio(asfStream);
int requestedSampleCount = 10000;
byte[] data = asfAudio.GetSampleBytes(requestedSampleCount);
Assert.AreEqual(requestedSampleCount, data.Length);
}
