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);
}
/// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=
/// <summary>
/// Handles topology status changes reported by the media session TantaAsyncCallbackHandler
/// </summary>
/// <param name="sender">the object sending the event</param>
/// <param name="mediaEvent">the event generated by the media session. Do NOT release this here.</param>
/// <param name="mediaEventType">the eventType</param>
/// <param name="topoStatus">the topology status flag</param>
/// <history>
/// 01 Nov 18 Cynic - Originally Written
/// </history>
private void HandleTopologyStatusChanged(IMFMediaEvent mediaEvent, MediaEventType mediaEventType, MFTopoStatus topoStatus)
{
LogMessage("HandleTopologyStatusChanged event type: " + mediaEventType.ToString() + ", topoStatus=" + topoStatus.ToString());
if (topoStatus == MFTopoStatus.Ready)
{
MediaSessionTopologyNowReady(mediaEvent);
}
else
{
// we are not interested in any other status changes
return;
}
}
void IMFAsyncCallback.Invoke(IMFAsyncResult pResult)
{
IMFMediaEvent pEvent = null;
MediaEventType meType = MediaEventType.MEUnknown; // Event type
int hrStatus = 0; // Event status
MFTopoStatus TopoStatus = MFTopoStatus.Invalid; // Used with MESessionTopologyStatus event.
try
{
// Get the event from the event queue.
m_pSession.EndGetEvent(pResult, out pEvent);
// Get the event type.
pEvent.GetType(out meType);
// Get the event status. If the operation that triggered the event did
// not succeed, the status is a failure code.
pEvent.GetStatus(out hrStatus);
TRACE(string.Format("Media event: " + meType.ToString()));
// Check if the async operation succeeded.
if (Succeeded(hrStatus))
{
// Switch on the event type. Update the internal state of the CPlayer as needed.
switch (meType)
{
case MediaEventType.MESessionTopologyStatus:
// Get the status code.
int i;
pEvent.GetUINT32(MFAttributesClsid.MF_EVENT_TOPOLOGY_STATUS, out i);
TopoStatus = (MFTopoStatus)i;
switch (TopoStatus)
{
case MFTopoStatus.Ready:
OnTopologyReady(pEvent);
break;
default:
// Nothing to do.
break;
}
break;
case MediaEventType.MESessionStarted:
OnSessionStarted(pEvent);
break;
case MediaEventType.MESessionPaused:
OnSessionPaused(pEvent);
break;
case MediaEventType.MESessionClosed:
OnSessionClosed(pEvent);
break;
case MediaEventType.MEEndOfPresentation:
OnPresentationEnded(pEvent);
break;
}
}
else
{
// The async operation failed. Notify the application
NotifyError(hrStatus);
}
}
finally
{
// Request another event.
if (meType != MediaEventType.MESessionClosed)
{
m_pSession.BeginGetEvent(this, null);
}
SafeRelease(pEvent);
}
}
private void HandleTopologyStatusChanged(MediaEventType mediaEventType, MFTopoStatus topoStatus)
{
Console.WriteLine("HandleTopologyStatusChanged event type: " + mediaEventType.ToString() + ", topoStatus=" + topoStatus.ToString());
// we currently arent paying attention to these
return;
}
