/// <summary> /// Processes the media session event. /// </summary> private void ProcessEvent() { while (m_Session != null) { try { m_Session.GetEvent(1, out IMFMediaEvent _event);//requests events and returns immediately _event.GetType(out MediaEventType eventtype); switch (eventtype) { case MediaEventType.MESessionEnded: PlaybackState = PlaybackState.Stopped; PlaybackStopped?.Invoke(this, new StoppedEventArgs()); break; case MediaEventType.MESessionTopologyStatus: //topology loaded Guid guidManager = typeof(IAudioSessionManager).GUID; (new MMDeviceEnumeratorComObject() as IMMDeviceEnumerator). GetDefaultAudioEndpoint(CoreAudioApi.DataFlow.Render, CoreAudioApi.Role.Multimedia, out IMMDevice endoint); endoint.Activate(ref guidManager, ClsCtx.ALL, IntPtr.Zero, out object _manager); IAudioSessionManager manager = _manager as IAudioSessionManager; manager.GetSimpleAudioVolume(Guid.Empty, 0, out m_volume); m_Session.GetClock(out m_clock); Guid guid_ratecontrol = typeof(IMFRateControl).GUID; Guid MF_RATE_CONTROL_SERVICE = Guid.Parse("866fa297-b802-4bf8-9dc9-5e3b6a9f53c9"); MediaFoundationInterop.MFGetService(m_Session, ref MF_RATE_CONTROL_SERVICE, ref guid_ratecontrol, out object _control); //gets rate control m_rate = _control as IMFRateControl; Prepared = true; break; } _event = null; } catch (COMException e) { if (e.HResult == MediaFoundationErrors.MF_E_NO_EVENTS_AVAILABLE) { continue; } else { throw e; } } catch (ThreadAbortException) { break; } } }
private void ProcesssMediaEvents() { Dispatcher.BeginInvoke((Action) delegate { if (m_pSession != null) { IMFMediaEvent pmet; MFEventFlag flags = MFEventFlag.NoWait; /* Get all the queued events from the interface */ while (m_pSession.GetEvent(flags, out pmet) == 0) { /* Handle anything for this event code */ OnMediaEvent(pmet); } } }); }
private static HResult RunMediaSession(IMFMediaSession mediaSession) { HResult hr = S_OK; bool receiveSessionEvent = true; while (receiveSessionEvent) { HResult hrStatus = S_OK; IMFMediaEvent mediaEvent = null; MediaEventType eventType = MediaEventType.MEUnknown; MFTopoStatus topoStatus = MFTopoStatus.Invalid; hr = mediaSession.GetEvent(MFEventFlag.None, out mediaEvent); if (Succeeded(hr)) { hr = mediaEvent.GetStatus(out hrStatus); } if (Succeeded(hr)) { hr = mediaEvent.GetType(out eventType); } if (Succeeded(hr) && Succeeded(hrStatus)) { switch (eventType) { case MediaEventType.MESessionTopologySet: Debug.WriteLine("MediaSession:TopologySetEvent"); break; case MediaEventType.MESessionTopologyStatus: Debug.WriteLine("MediaSession:TopologStatusEvent"); hr = mediaEvent.GetUINT32(MF_EVENT_TOPOLOGY_STATUS, out int topoStatusInt); if (Succeeded(hr)) { topoStatus = (MFTopoStatus)topoStatusInt; switch (topoStatus) { case MFTopoStatus.Ready: Debug.WriteLine("MediaSession:TopologyStatus: MFTopoStatus.Ready"); hr = mediaSession.Start(); break; default: Debug.WriteLine("MediaSession:TopologyStatus: MFTopoStatus." + topoStatus); break; } } break; case MediaEventType.MESessionClosed: Debug.WriteLine("MediaSession:SessionClosedEvent"); receiveSessionEvent = false; break; case MediaEventType.MESessionStopped: Debug.WriteLine("MediaSession:SesssionStoppedEvent"); hr = mediaSession.Stop(); break; default: Debug.WriteLine("MediaSession:Event: " + eventType); break; } mediaEvent = null; if (Failed(hr) || Failed(hrStatus)) { receiveSessionEvent = false; } } } return(hr); }