public HRESULT GetBlobSize(Guid guidKey, out uint pcbBlobSize)
{
var hr = _type.GetBlobSize(guidKey, out pcbBlobSize);
Trace("guid: " + guidKey.ToName() + " size: " + pcbBlobSize + " hr: " + hr);
return(hr);
}
public static byte[] GetBlob(this IMFMediaType input, Guid key)
{
if (input == null)
{
throw new ArgumentNullException(nameof(input));
}
if (input.GetBlobSize(key, out var size).IsError || size == 0)
{
return(null);
}
var bytes = new byte[(int)size];
input.GetBlob(key, bytes, (int)size, IntPtr.Zero).ThrowOnError();
return(bytes);
}
public static byte[] GetBlob(this IMFMediaType obj, Guid key)
{
if (obj == null)
{
throw new ArgumentNullException(nameof(obj));
}
if (obj.GetBlobSize(key, out var size).IsError || size == 0)
{
return(null);
}
var bytes = new byte[(int)size];
obj.GetBlob(key, bytes, size, ref size).ThrowOnError();
return(bytes);
}