public static void MFGetBlob(IMFAttributes p, Guid g, object obj)
{
HResult hr;
int iSize;
int i;
// Get the blob into a byte array
hr = p.GetBlobSize(g, out iSize);
MFError.ThrowExceptionForHR(hr);
byte[] b = new byte[iSize];
hr = p.GetBlob(g, b, iSize, out i);
MFError.ThrowExceptionForHR(hr);
GCHandle h = GCHandle.Alloc(b, GCHandleType.Pinned);
try
{
IntPtr ip = h.AddrOfPinnedObject();
// Convert the byte array to an IntPtr
Marshal.PtrToStructure(ip, obj);
}
finally
{
h.Free();
}
}
public static byte[] GetBlob(this IMFAttributes 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);
}
public static byte[] GetBlob(this IMFAttributes 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 void MFGetBlob(IMFAttributes p, Guid g, object obj)
{
int hr;
int iSize;
int i;
// Get the blob into a byte array
hr = p.GetBlobSize(g, out iSize);
MFError.ThrowExceptionForHR(hr);
byte[] b = new byte[iSize];
hr = p.GetBlob(g, b, iSize, out i);
MFError.ThrowExceptionForHR(hr);
GCHandle h = GCHandle.Alloc(b, GCHandleType.Pinned);
try
{
IntPtr ip = h.AddrOfPinnedObject();
// Convert the byte array to an IntPtr
Marshal.PtrToStructure(ip, obj);
}
finally
{
h.Free();
}
}
public HResult GetBlobSize(Guid guidKey, out int pcbBlobSize)
{
return(m_Attribs.GetBlobSize(guidKey, out pcbBlobSize));
}