public IMFMediaEngine CreateInstance(
MediaEngineCreateFlags createFlags = MediaEngineCreateFlags.None,
IMFAttributes?attributes = default,
MediaEngineNotifyDelegate?playbackCallback = default)
{
attributes ??= MFCreateAttributes(1);
MediaEngineNotifyImpl mediaEngineNotifyImpl = new();
try
{
attributes.Set(MediaEngineAttributeKeys.Callback, mediaEngineNotifyImpl);
CreateInstance(createFlags, attributes, out IMFMediaEngine engine).CheckError();
mediaEngineNotifyImpl.MediaEngine = engine;
engine.mediaEngineNotifyImpl = mediaEngineNotifyImpl;
if (playbackCallback != null)
{
engine.PlaybackEvent += playbackCallback;
}
return(engine);
}
catch
{
mediaEngineNotifyImpl.Dispose();
throw;
}
}
/// <summary>
/// Initializes an instance of the <see cref="MediaEngine"/> class.
/// </summary>
/// <param name="factory"></param>
/// <param name="attributes"></param>
/// <param name="createFlags"> </param>
public MediaEngine(MediaEngineClassFactory factory, MediaEngineAttributes attributes = null, MediaEngineCreateFlags createFlags = MediaEngineCreateFlags.None, MediaEngineNotifyDelegate playbackCallback = null)
{
// Create engine attributes if null
attributes = attributes ?? new MediaEngineAttributes();
PlaybackEvent = playbackCallback;
// Setup by default the MediaEngine notify as it is mandatory
mediaEngineNotifyImpl = new MediaEngineNotifyImpl(this);
try
{
attributes.Set(MediaEngineAttributeKeys.Callback, new ComObject(MediaEngineNotifyShadow.ToIntPtr(mediaEngineNotifyImpl)));
factory.CreateInstance(createFlags, attributes, this);
} catch
{
mediaEngineNotifyImpl.Dispose();
mediaEngineNotifyImpl = null;
throw;
}
}
/// <summary>
/// Initializes an instance of the <see cref="MediaEngine"/> class.
/// </summary>
/// <param name="factory"></param>
/// <param name="attributes"></param>
/// <param name="createFlags"> </param>
/// <param name="playbackCallback"></param>
/// <msdn-id>hh447921</msdn-id>
/// <unmanaged>HRESULT IMFMediaEngineClassFactory::CreateInstance([In] MF_MEDIA_ENGINE_CREATEFLAGS dwFlags,[In] IMFAttributes* pAttr,[Out, Fast] IMFMediaEngine** ppPlayer)</unmanaged>
/// <unmanaged-short>IMFMediaEngineClassFactory::CreateInstance</unmanaged-short>
public MediaEngine(MediaEngineClassFactory factory, MediaEngineAttributes attributes = null, MediaEngineCreateFlags createFlags = MediaEngineCreateFlags.None, MediaEngineNotifyDelegate playbackCallback = null)
{
// Create engine attributes if null
attributes = attributes ?? new MediaEngineAttributes();
if (playbackCallback != null)
{
PlaybackEvent += playbackCallback;
}
// Setup by default the MediaEngine notify as it is mandatory
mediaEngineNotifyImpl = new MediaEngineNotifyImpl(this);
try
{
attributes.Set(MediaEngineAttributeKeys.Callback, new ComObject(MediaEngineNotifyShadow.ToIntPtr(mediaEngineNotifyImpl)));
factory.CreateInstance(createFlags, attributes, this);
} catch
{
mediaEngineNotifyImpl.Dispose();
mediaEngineNotifyImpl = null;
throw;
}
}
