/// <summary>
/// Creation of the fgm and the adding / removing of filters needs to happen on the
/// same thread. So make sure it all happens on the UI thread.
/// </summary>
private void _RtpStream_FirstFrameReceived()
{
lock (fgmLock)
{
DisposeFgm();
Debug.Assert(fgm == null);
// Create the DirectShow filter graph manager
fgm = new FilgraphManagerClass();
IGraphBuilder iGB = (IGraphBuilder)fgm;
rotID = FilterGraph.AddToRot((IGraphBuilder)fgm);
IBaseFilter bfSource = RtpSourceClass.CreateInstance();
((MSR.LST.MDShow.Filters.IRtpSource)bfSource).Initialize(rtpStream);
iGB.AddFilter(bfSource, "RtpSource");
iGB.Render(Filter.GetPin(bfSource, _PinDirection.PINDIR_OUTPUT, Guid.Empty,
Guid.Empty, false, 0));
DisableDXVA(fgm);
// Render the video inside of the form
iVW = (IVideoWindow)fgm;
// Get the correct ratio to use for the video stretching
// I would expect the fgm to always be castable to this, but I simply don't trust DShow
IBasicVideo iBV = fgm as IBasicVideo;
if (iBV != null)
{
int vidWidth, vidHeight;
iBV.GetVideoSize(out vidWidth, out vidHeight);
vidSrcRatio = (double)vidHeight / (double)vidWidth;
}
// Remove the border from the default DShow renderer UI
int ws = WindowStyle;
ws = ws & ~(0x00800000); // Remove WS_BORDER
ws = ws & ~(0x00400000); // Remove WS_DLGFRAME
WindowStyle = ws;
iVW = null;
uiState &= ~(int)FAudioVideo.UIState.RemoteVideoStopped;
if (form != null)
{
((FAudioVideo)form).UpdateVideoUI(uiState);
}
// FirstFrameReceived interprets fgmState as the *desired* state for the fgm
// Because ResumePlayingVideo won't actually start if the state is already
// Running, we change it to Stopped so that it will start
if (IsPlaying && fgmState == FilterGraph.State.Running)
{
fgmState = FilterGraph.State.Stopped;
ResumePlayingVideo();
}
}
}
private void InitializeFgm()
{
fgm = new FilgraphManagerClass();
iGB = (IGraphBuilder)fgm;
rotID = FilterGraph.AddToRot(iGB);
iCGB2 = CaptureGraphBuilder2Class.CreateInstance();
iCGB2.SetFiltergraph(iGB);
}
/// <summary>
/// Creation of the fgm and the adding / removing of filters needs to happen on the
/// same thread. So make sure it all happens on the UI thread.
/// </summary>
private void _RtpStream_FirstFrameReceived()
{
lock (fgmLock)
{
DisposeFgm();
Debug.Assert(fgm == null);
fgm = new FilgraphManagerClass();
IGraphBuilder iGB = (IGraphBuilder)fgm;
rotID = FilterGraph.AddToRot(iGB);
IBaseFilter rtpSource = RtpSourceClass.CreateInstance();
((MSR.LST.MDShow.Filters.IRtpSource)rtpSource).Initialize(rtpStream);
iGB.AddFilter(rtpSource, "RtpSource");
// Add the chosen audio renderer
FilterInfo fi = SelectedSpeaker();
iGB.AddFilter(Filter.CreateBaseFilter(fi), fi.Name);
iGB.Render(Filter.GetPin(rtpSource, _PinDirection.PINDIR_OUTPUT, Guid.Empty,
Guid.Empty, false, 0));
iBA = (IBasicAudio)fgm;
currentVolume = (int)Math.Round(Math.Pow(10.0, (2.0 * (double)(iBA.Volume + 10000)) / 10000.0));
iBA = null;
uiState &= ~(int)FAudioVideo.UIState.RemoteAudioStopped;
if (form != null)
{
((FAudioVideo)form).UpdateAudioUI(uiState);
}
// FirstFrameReceived interprets fgmState as the *desired* state for the fgm
// Because ResumePlayingAudio won't actually start if the state is already
// Running, we change it to Stopped so that it will start
if (IsPlaying && fgmState == FilterGraph.State.Running)
{
fgmState = FilterGraph.State.Stopped;
ResumePlayingAudio();
}
}
}
/// <summary>
/// Creates and initializes the Fgm, retrieves interfaces from it, starts the monitoring
/// thread etc. the first time. Stops it subsequent times.
/// </summary>
private void InitializeFgm()
{
if (fgm == null)
{
fgm = new FilgraphManagerClass();
iGB = (IGraphBuilder)fgm;
iCGB2 = MDShow.CaptureGraphBuilder2Class.CreateInstance();
iCGB2.SetFiltergraph(iGB);
rotID = FilterGraph.AddToRot(iGB);
// Initialize class that will monitor events on the fgm
fgmEventMonitor = new FgmEventMonitor((IMediaEvent)fgm);
fgmEventMonitor.FgmEvent += new FgmEventMonitor.FgmEventHandler(FgmEvent);
}
else
{
fgm.Stop();
}
}
