protected virtual void SetupAudio()
{
int hr;
IEnumFilters enumFilters;
hr = _graph.EnumFilters(out enumFilters);
DsError.ThrowExceptionForHR(hr);
IBaseFilter[] filters = new IBaseFilter[1];
IntPtr fetched = new IntPtr();
while (enumFilters.Next(1, filters, fetched) == 0)
{
IBaseFilter filter = filters[0] as IBaseFilter;
IPin unconnectedPin = DsFindPin.ByConnectionStatus((IBaseFilter)filter, PinConnectedStatus.Unconnected, 0);
if (unconnectedPin != null)
{
PinDirection direction;
hr = unconnectedPin.QueryDirection(out direction);
DsError.ThrowExceptionForHR(hr);
if (direction == PinDirection.Output)
{
hr = _graph.Render(unconnectedPin);
DsError.ThrowExceptionForHR(hr);
SetupSampleGrabber();
}
}
}
}
void TestRenderStream()
{
int hr;
IBaseFilter ifilt;
// Try using nulls
hr = m_icgb2.RenderStream(null, null, m_Source, null, m_Multiplexer);
DsError.ThrowExceptionForHR(hr);
hr = m_graphBuilder.FindFilterByName("AVI Splitter", out ifilt);
DsError.ThrowExceptionForHR(hr);
IPin ipin = DsFindPin.ByConnectionStatus(ifilt, PinConnectedStatus.Unconnected, 0);
Guid g = DsUtils.GetPinCategory(ipin);
// With this setup, there is no valid value for parm1
hr = m_icgb2.RenderStream(null, MediaType.Audio, m_Source, null, m_Multiplexer);
DsError.ThrowExceptionForHR(hr);
}
private void SetupSampleGrabber()
{
if (_graph == null)
{
return;
}
int hr;
//Get directsound filter
IBaseFilter directSoundFilter;
hr = _graph.FindFilterByName(DEFAULT_AUDIO_RENDERER_NAME, out directSoundFilter);
DsError.ThrowExceptionForHR(hr);
IPin rendererPinIn = DsFindPin.ByConnectionStatus(directSoundFilter, PinConnectedStatus.Connected, 0);
if (rendererPinIn != null)
{
IPin audioPinOut;
hr = rendererPinIn.ConnectedTo(out audioPinOut);
DsError.ThrowExceptionForHR(hr);
if (audioPinOut != null)
{
//Disconect audio decoder to directsound renderer
hr = audioPinOut.Disconnect();
DsError.ThrowExceptionForHR(hr);
hr = _graph.RemoveFilter(directSoundFilter);
DsError.ThrowExceptionForHR(hr);
//Add Sample Grabber
ISampleGrabber sampleGrabber = new SampleGrabber() as ISampleGrabber;
hr = sampleGrabber.SetCallback(this, 1);
DsError.ThrowExceptionForHR(hr);
AMMediaType media;
media = new AMMediaType();
media.majorType = MediaType.Audio;
media.subType = MediaSubType.PCM;
media.formatType = FormatType.WaveEx;
hr = sampleGrabber.SetMediaType(media);
DsError.ThrowExceptionForHR(hr);
IPin sampleGrabberPinIn = DsFindPin.ByDirection((IBaseFilter)sampleGrabber, PinDirection.Input, 0);
IPin sampleGrabberPinOut = DsFindPin.ByDirection((IBaseFilter)sampleGrabber, PinDirection.Output, 0);
hr = _graph.AddFilter((IBaseFilter)sampleGrabber, "SampleGrabber");
DsError.ThrowExceptionForHR(hr);
PinInfo pinInfo;
hr = audioPinOut.QueryPinInfo(out pinInfo);
DsError.ThrowExceptionForHR(hr);
FilterInfo filterInfo;
hr = pinInfo.filter.QueryFilterInfo(out filterInfo);
DsError.ThrowExceptionForHR(hr);
hr = _graph.Connect(audioPinOut, sampleGrabberPinIn);
DsError.ThrowExceptionForHR(hr);
//Add null renderer
NullRenderer nullRenderer = new NullRenderer();
hr = _graph.AddFilter((IBaseFilter)nullRenderer, "NullRenderer");
DsError.ThrowExceptionForHR(hr);
IPin nullRendererPinIn = DsFindPin.ByDirection((IBaseFilter)nullRenderer, PinDirection.Input, 0);
hr = _graph.Connect(sampleGrabberPinOut, nullRendererPinIn);
DsError.ThrowExceptionForHR(hr);
_audioEngine.Setup(this.GetSampleGrabberFormat(sampleGrabber));
}
}
}
/// <summary>
/// Builds the DVD DirectShow graph
/// </summary>
private void BuildGraph()
{
try
{
FreeResources();
int hr;
/* Create our new graph */
m_graph = (IGraphBuilder) new FilterGraphNoThread();
#if DEBUG
m_rot = new DsROTEntry(m_graph);
#endif
/* We are going to use the VMR9 for now. The EVR does not
* seem to work with the interactive menus yet. It should
* play Dvds fine otherwise */
var rendererType = VideoRendererType.VideoMixingRenderer9;
/* Creates and initializes a new renderer ready to render to WPF */
m_renderer = CreateVideoRenderer(rendererType, m_graph, 2);
/* Do some VMR9 specific stuff */
if (rendererType == VideoRendererType.VideoMixingRenderer9)
{
var mixer = m_renderer as IVMRMixerControl9;
if (mixer != null)
{
VMR9MixerPrefs dwPrefs;
mixer.GetMixingPrefs(out dwPrefs);
dwPrefs &= ~VMR9MixerPrefs.RenderTargetMask;
dwPrefs |= VMR9MixerPrefs.RenderTargetYUV;
/* Enable this line to prefer YUV */
//hr = mixer.SetMixingPrefs(dwPrefs);
}
}
/* Create a new DVD Navigator. */
var dvdNav = (IBaseFilter) new DVDNavigator();
/* The DVDControl2 interface lets us control DVD features */
m_dvdControl = dvdNav as IDvdControl2;
if (m_dvdControl == null)
{
throw new Exception("Could not QueryInterface the IDvdControl2 interface");
}
/* QueryInterface the DVDInfo2 */
m_dvdInfo = dvdNav as IDvdInfo2;
/* If a Dvd directory has been set then use it, if not, let DShow find the Dvd */
if (!string.IsNullOrEmpty(DvdDirectory))
{
hr = m_dvdControl.SetDVDDirectory(DvdDirectory);
DsError.ThrowExceptionForHR(hr);
}
/* This gives us the DVD time in Hours-Minutes-Seconds-Frame time format, and other options */
hr = m_dvdControl.SetOption(DvdOptionFlag.HMSFTimeCodeEvents, true);
DsError.ThrowExceptionForHR(hr);
/* If the graph stops, resume at the same point */
m_dvdControl.SetOption(DvdOptionFlag.ResetOnStop, false);
hr = m_graph.AddFilter(dvdNav, "DVD Navigator");
DsError.ThrowExceptionForHR(hr);
IPin dvdVideoPin = null;
IPin dvdAudioPin = null;
IPin dvdSubPicturePin = null;
IPin dvdNavPin;
int i = 0;
/* Loop all the output pins on the DVD Navigator, trying to find which pins are which.
* We could more easily find the pins by name, but this is more fun...and more flexible
* if we ever want to use a 3rd party DVD navigator that used different pin names */
while ((dvdNavPin = DsFindPin.ByDirection(dvdNav, PinDirection.Output, i)) != null)
{
var mediaTypes = new AMMediaType[1];
IntPtr pFetched = IntPtr.Zero;
IEnumMediaTypes mediaTypeEnum;
dvdNavPin.EnumMediaTypes(out mediaTypeEnum);
/* Loop over each of the mediaTypes of each pin */
while (mediaTypeEnum.Next(1, mediaTypes, pFetched) == 0)
{
AMMediaType mediaType = mediaTypes[0];
/* This will be the video stream pin */
if (mediaType.subType == MediaSubType.Mpeg2Video)
{
/* Keep the ref and we'll work with it later */
dvdVideoPin = dvdNavPin;
break;
}
/* This will be the audio stream pin */
if (mediaType.subType == MediaSubType.DolbyAC3 ||
mediaType.subType == MediaSubType.Mpeg2Audio)
{
/* Keep the ref and we'll work with it later */
dvdAudioPin = dvdNavPin;
break;
}
/* This is the Dvd sub picture pin. This generally
* shows overlays for Dvd menus and sometimes closed captions */
if (mediaType.subType == DVD_SUBPICTURE_TYPE)
{
/* Keep the ref and we'll work with it later */
dvdSubPicturePin = dvdNavPin;
break;
}
}
mediaTypeEnum.Reset();
Marshal.ReleaseComObject(mediaTypeEnum);
i++;
}
/* This is the windowed renderer. This is *NEEDED* in order
* for interactive menus to work with the other VMR9 in renderless mode */
var dummyRenderer = (IBaseFilter) new VideoMixingRenderer9();
var dummyRendererConfig = (IVMRFilterConfig9)dummyRenderer;
/* In order for this interactive menu trick to work, the VMR9
* must be set to Windowed. We will make sure the window is hidden later on */
hr = dummyRendererConfig.SetRenderingMode(VMR9Mode.Windowed);
DsError.ThrowExceptionForHR(hr);
hr = dummyRendererConfig.SetNumberOfStreams(1);
DsError.ThrowExceptionForHR(hr);
hr = m_graph.AddFilter(dummyRenderer, "Dummy Windowed");
DsError.ThrowExceptionForHR(hr);
if (dvdAudioPin != null)
{
/* This should render out to the default audio device. We
* could modify this code here to go out any audio
* device, such as SPDIF or another sound card */
hr = m_graph.Render(dvdAudioPin);
DsError.ThrowExceptionForHR(hr);
}
/* Get the first input pin on our dummy renderer */
m_dummyRendererPin = DsFindPin.ByConnectionStatus(dummyRenderer, /* Filter to search */
PinConnectedStatus.Unconnected,
0);
/* Get an available pin on our real renderer */
IPin rendererPin = DsFindPin.ByConnectionStatus(m_renderer, /* Filter to search */
PinConnectedStatus.Unconnected,
0); /* Pin index */
/* Connect the pin to the renderer */
hr = m_graph.Connect(dvdVideoPin, rendererPin);
DsError.ThrowExceptionForHR(hr);
/* Get the next available pin on our real renderer */
rendererPin = DsFindPin.ByConnectionStatus(m_renderer, /* Filter to search */
PinConnectedStatus.Unconnected,
0); /* Pin index */
/* Render the sub picture, which will connect
* the DVD navigator to the codec, not the renderer */
hr = m_graph.Render(dvdSubPicturePin);
DsError.ThrowExceptionForHR(hr);
/* These are the subtypes most likely to be our dvd subpicture */
var preferedSubpictureTypes = new[] { MediaSubType.ARGB4444,
MediaSubType.AI44,
MediaSubType.AYUV,
MediaSubType.ARGB32 };
IPin dvdSubPicturePinOut = null;
/* Find what should be the subpicture pin out */
foreach (var guidType in preferedSubpictureTypes)
{
dvdSubPicturePinOut = FindPinInGraphByMediaType(guidType, /* GUID of the media type being searched for */
PinDirection.Output,
m_graph); /* Our current graph */
if (dvdSubPicturePinOut != null)
{
break;
}
}
if (dvdSubPicturePinOut == null)
{
throw new Exception("Could not find the sub picture pin out");
}
/* Here we connec thte Dvd sub picture pin to the video renderer.
* This enables the overlays on Dvd menus and some closed
* captions to be rendered. */
hr = m_graph.Connect(dvdSubPicturePinOut, rendererPin);
DsError.ThrowExceptionForHR(hr);
/* Search for the Line21 out in the graph */
IPin line21Out = FindPinInGraphByMediaType(MediaType.AuxLine21Data,
PinDirection.Output,
m_graph);
if (line21Out == null)
{
throw new Exception("Could not find the Line21 pin out");
}
/* We connect our line21Out out in to the dummy renderer
* this is what ultimatly makes interactive DVDs work with
* VMR9 in renderless (for WPF) */
hr = m_graph.Connect(line21Out, m_dummyRendererPin);
DsError.ThrowExceptionForHR(hr);
/* This is the dummy renderers Win32 window. */
m_dummyRenderWindow = dummyRenderer as IVideoWindow;
if (m_dummyRenderWindow == null)
{
throw new Exception("Could not QueryInterface for IVideoWindow");
}
ConfigureDummyWindow();
/* Setup our base classes with this filter graph */
SetupFilterGraph(m_graph);
/* Sets the NaturalVideoWidth/Height */
//SetNativePixelSizes(m_renderer);
}
catch (Exception ex)
{
FreeResources();
InvokeMediaFailed(new MediaFailedEventArgs(ex.Message, ex));
return;
}
InvokeMediaOpened();
}
private void RenderStreams(IBaseFilter pSource)
{
int hr;
bool bRenderedAudio = false;
bool bRenderedVideo = false;
IBaseFilter pEVR = (IBaseFilter) new EnhancedVideoRenderer();
IBaseFilter pAudioRenderer = (IBaseFilter) new DSoundRender();
try
{
// Add the EVR to the graph.
hr = m_pGraph.AddFilter(pEVR, "EVR");
DsError.ThrowExceptionForHR(hr);
InitializeEVR(pEVR, 1, out m_pDisplay);
// Add the DSound Renderer to the graph.
hr = m_pGraph.AddFilter(pAudioRenderer, "Audio Renderer");
DsError.ThrowExceptionForHR(hr);
ICaptureGraphBuilder2 cgb;
cgb = (ICaptureGraphBuilder2) new CaptureGraphBuilder2();
try
{
hr = cgb.SetFiltergraph(m_pGraph);
DsError.ThrowExceptionForHR(hr);
// Connect the streams.
hr = cgb.RenderStream(null, MediaType.Video, pSource, null, pEVR);
DsError.ThrowExceptionForHR(hr);
hr = cgb.RenderStream(null, MediaType.Audio, pSource, null, pAudioRenderer);
DsError.ThrowExceptionForHR(hr);
// If we are using a splitter, the two lines above did nothing. We
// ignore the errors from the next 2 statements in case the 2 lines above
// *did* do something.
hr = cgb.RenderStream(null, null, pSource, null, pEVR);
//DsError.ThrowExceptionForHR(hr);
hr = cgb.RenderStream(null, null, pSource, null, pAudioRenderer);
//DsError.ThrowExceptionForHR(hr);
IPin pPin = DsFindPin.ByConnectionStatus(pEVR, PinConnectedStatus.Unconnected, 0);
if (pPin == null)
{
bRenderedVideo = true;
}
else
{
Marshal.ReleaseComObject(pPin);
}
pPin = DsFindPin.ByConnectionStatus(pAudioRenderer, PinConnectedStatus.Unconnected, 0);
if (pPin == null)
{
bRenderedAudio = true;
}
else
{
Marshal.ReleaseComObject(pPin);
}
}
finally
{
Marshal.ReleaseComObject(cgb);
}
// Remove un-used renderers.
if (!bRenderedVideo)
{
m_pGraph.RemoveFilter(pEVR);
// If we removed the EVR, then we also need to release our
// pointer to the EVR display interfaace
//Marshal.ReleaseComObject(m_pDisplay);
m_pDisplay = null;
}
else
{
// EVR is still in the graph. Cache the interface pointer.
Debug.Assert(pEVR != null);
m_pEVR = pEVR;
}
if (!bRenderedAudio)
{
m_pGraph.RemoveFilter(pAudioRenderer);
}
}
finally
{
Marshal.ReleaseComObject(pAudioRenderer);
}
}