/// <summary>
/// Creates an instance of the sink writer, given an IMFByteStream instance.
/// </summary>
/// <param name="factory">A valid IMFReadWriteClassFactory instance.</param>
/// <param name="mediaSink">A byte streamIndex used by the sink writer to write data.</param>
/// <param name="attributes">A instance to the IMFAttributes interface. You can use this parameter to configure the sink writer.</param>
/// <param name="sourceReader">Receives the sink writer.</param>
/// <returns>If this function succeeds, it returns the S_OK member. Otherwise, it returns another HResult's member that describe the error.</returns>
public static HResult CreateInstanceFromObject(this IMFReadWriteClassFactory factory, IMFByteStream byteStream, IMFAttributes attributes, out IMFSinkWriter sinkWriter)
{
if (factory == null)
{
throw new ArgumentNullException("factory");
}
object tmp;
HResult hr = factory.CreateInstanceFromObject(CLSID.CLSID_MFSinkWriter, byteStream, attributes, typeof(IMFSinkWriterExtensions).GUID, out tmp);
sinkWriter = hr.Succeeded() ? tmp as IMFSinkWriter : null;
return(hr);
}
/// <summary>
/// Creates an instance of the source reader given a URL.
/// </summary>
/// <param name="factory">A valid IMFReadWriteClassFactory instance.</param>
/// <param name="url">A string that specifies the input file for the source reader.</param>
/// <param name="attributes">A instance to the IMFAttributes interface. You can use this parameter to configure the source reader.</param></param>
/// <param name="sourceReader">Receives the source reader</param>
/// <returns>If this function succeeds, it returns the S_OK member. Otherwise, it returns another HResult's member that describe the error.</returns>
public static HResult CreateInstanceFromURL(this IMFReadWriteClassFactory factory, string url, IMFAttributes attributes, out IMFSourceReader sourceReader)
{
if (factory == null)
{
throw new ArgumentNullException("factory");
}
object tmp;
HResult hr = factory.CreateInstanceFromURL(CLSID.CLSID_MFSourceReader, url, attributes, typeof(IMFSourceReader).GUID, out tmp);
sourceReader = hr.Succeeded() ? tmp as IMFSourceReader : null;
return(hr);
}
private void CreateReaderAndWriter()
{
object sourceReaderObject = null;
object sinkWriterObject = null;
IMFAttributes attributes = null;
// Create the class factory
IMFReadWriteClassFactory factory = (IMFReadWriteClassFactory)(new MFReadWriteClassFactory());
// Create the attributes
MFHelper.MFCreateAttributes(out attributes, 1);
attributes.SetUINT32(new Guid(Consts.MF_READWRITE_ENABLE_HARDWARE_TRANSFORMS), 1);
// Use the factory to create the Source Reader
factory.CreateInstanceFromURL(new Guid(CLSID.MFSourceReader), this.sourceFilename, attributes, new Guid(IID.IMFSourceReader), out sourceReaderObject);
this.sourceReader = (IMFSourceReader)sourceReaderObject;
// Use the factory to create the Sink Writer
factory.CreateInstanceFromURL(new Guid(CLSID.MFSinkWriter), this.targetFilename, attributes, new Guid(IID.IMFSinkWriter), out sinkWriterObject);
this.sinkWriter = (IMFSinkWriter)sinkWriterObject;
}
