public AsfProperties(AsfHeaderObject header, ReadStyle style) : base(style)
{
duration = TimeSpan.Zero;
//codecId = 0;
//channels = 0;
//sampleRate = 0;
//bytesPerSecond = 0;
foreach (AsfObject obj in header.Children)
{
if (obj is AsfFilePropertiesObject)
{
duration = ((AsfFilePropertiesObject)obj).PlayDuration;
}
if (obj is AsfStreamPropertiesObject && bytesPerSecond == 0)
{
AsfStreamPropertiesObject stream = (AsfStreamPropertiesObject)obj;
if (!stream.StreamType.Equals(AsfGuid.AsfAudioMedia))
{
continue;
}
ByteVector data = stream.TypeSpecificData;
codecId = data.Mid(0, 2).ToShort(false);
channels = data.Mid(2, 2).ToShort(false);
sampleRate = data.Mid(4, 4).ToUInt(false);
bytesPerSecond = data.Mid(8, 4).ToUInt(false);
}
}
}
public AsfObject[] ReadObjects(uint count, long position)
{
ArrayList l = new ArrayList();
for (int i = 0; i < (int)count; i++)
{
Seek(position);
AsfGuid id = ReadGuid();
AsfObject obj;
if (id.Equals(AsfGuid.AsfFilePropertiesObject))
{
obj = new AsfFilePropertiesObject(this, position);
}
else if (id.Equals(AsfGuid.AsfStreamPropertiesObject))
{
obj = new AsfStreamPropertiesObject(this, position);
}
else if (id.Equals(AsfGuid.AsfContentDescriptionObject))
{
obj = new AsfContentDescriptionObject(this, position);
}
else if (id.Equals(AsfGuid.AsfExtendedContentDescriptionObject))
{
obj = new AsfExtendedContentDescriptionObject(this, position);
}
else if (id.Equals(AsfGuid.AsfPaddingObject))
{
obj = new AsfPaddingObject(this, position);
}
else
{
obj = new AsfUnknownObject(this, position);
}
l.Add(obj);
position += obj.OriginalSize;
}
return((AsfObject[])l.ToArray(typeof(AsfObject)));
}
public AsfObject[] ReadObjects(uint count, long position)
{
ArrayList l = new ArrayList();
for (int i = 0; i < (int)count; i++)
{
Seek(position);
AsfGuid id = ReadGuid();
AsfObject obj;
if (id.Equals(AsfGuid.AsfFilePropertiesObject))
obj = new AsfFilePropertiesObject(this, position);
else if (id.Equals(AsfGuid.AsfStreamPropertiesObject))
obj = new AsfStreamPropertiesObject(this, position);
else if (id.Equals(AsfGuid.AsfContentDescriptionObject))
obj = new AsfContentDescriptionObject(this, position);
else if (id.Equals(AsfGuid.AsfExtendedContentDescriptionObject))
obj = new AsfExtendedContentDescriptionObject(this, position);
else if (id.Equals(AsfGuid.AsfPaddingObject))
obj = new AsfPaddingObject(this, position);
else
obj = new AsfUnknownObject(this, position);
l.Add(obj);
position += obj.OriginalSize;
}
return (AsfObject[])l.ToArray(typeof(AsfObject));
}
