private void InitCaptureInterface()
{
// release com object (useless here but can't hurt)
Cleanup(true);
this.fmc = new FilgraphManagerClass();
// create the cg object and add the filter graph to it
Type t = Type.GetTypeFromCLSID(CLSID_CaptureGraphBuilder2);
this.icgb = (ICaptureGraphBuilder2)Activator.CreateInstance(t);
t = Type.GetTypeFromCLSID(CLSID_SampleGrabber);
this.isg = (ISampleGrabber)Activator.CreateInstance(t);
// source filter (the capture device)
this.sf = (IBaseFilter)this.SourceFilterList[this.cbxDevice.SelectedIndex];
// sample grabber filter
this.sgf = (IBaseFilter)this.isg;
object o = null;
this.icgb.RemoteFindInterface(ref PIN_CATEGORY_CAPTURE, ref MEDIATYPE_Video, sf, ref IID_IAMStreamConfig, out o);
this.iamsc = (IAMStreamConfig)o;
// set sample grabber media type
this.SGMediaType = new _AMMediaType();
this.SGMediaType.majortype = MEDIATYPE_Video;
this.SGMediaType.subtype = MEDIASUBTYPE_RGB24;
this.SGMediaType.formattype = FORMAT_VideoInfo;
this.isg.SetMediaType(ref SGMediaType);
this.isg.SetOneShot(0);
this.isg.SetBufferSamples(1);
}
public override bool RemoveCapability(ICapability capability)
{
bool ret = base.RemoveCapability(capability);
if (ret)
{
if (fgm != null)
{
fgm.Stop();
FilterGraph.RemoveFromRot(rotID);
FilterGraph.RemoveAllFilters(fgm);
fgm = null;
}
if (fgmEventMonitor != null)
{
fgmEventMonitor.FgmEvent -= new FgmEventMonitor.FgmEventHandler(FgmEvent);
fgmEventMonitor.Dispose();
fgmEventMonitor = null;
}
wmf = null;
}
return(ret);
}
protected CaptureGraph(FilterInfo fiSource)
{
try
{
// Fgm initialization
fgm = new FilgraphManagerClass();
iFG = (IFilterGraph)fgm;
iGB = (IGraphBuilder)fgm;
rotID = FilterGraph.AddToRot(iGB);
// Create source filter and initialize it
source = (SourceFilter)Filter.CreateFilter(fiSource);
iGB.AddFilter(source.BaseFilter, source.FriendlyName);
source.AddedToGraph(fgm);
// Pass flags to the RtpRenderer filter from the config file.
this.rtpRendererFlags = 0;
string setting = ConfigurationManager.AppSettings[AppConfig.MDS_RtpRendererFlags];
if (!String.IsNullOrEmpty(setting))
{
if (!byte.TryParse(setting, out rtpRendererFlags))
{
rtpRendererFlags = 0;
}
}
}
catch (Exception)
{
Cleanup();
throw;
}
}
public static IBaseFilter FindBaseFilterByName(FilgraphManagerClass fgm, string name)
{
IFilterGraph iFG = (IFilterGraph)fgm;
IEnumFilters iEnum;
iFG.EnumFilters(out iEnum);
IBaseFilter iBF = null;
uint fetched = 0;
iEnum.Next(1, out iBF, out fetched);
while (fetched == 1)
{
_FilterInfo fi;
iBF.QueryFilterInfo(out fi);
string filterName = fi.achName;
if (String.Compare(name, filterName) == 0)
{
return iBF;
}
iEnum.Next(1, out iBF, out fetched);
}
return null;
}
/// <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 createObjects()
{
filter = new FilgraphManagerClass();
mediaPos = (IMediaPosition)filter;
mediaEvent = (IMediaEventEx)filter;
mediaEvent.SetNotifyWindow(wnd.Handle.ToInt32(), WM_DS_NOTIFY, DS_NOTIFY_CODE);
}
private void InitializeFgm()
{
fgm = new FilgraphManagerClass();
iGB = (IGraphBuilder)fgm;
rotID = FilterGraph.AddToRot(iGB);
iCGB2 = CaptureGraphBuilder2Class.CreateInstance();
iCGB2.SetFiltergraph(iGB);
}
// CF3, CF2, CF1
private void Cleanup()
{
// CF3, Quit processing received data
if (fgm != null)
{
rtpStream.UnblockNextFrame();
fgm.Stop();
FilterGraph.RemoveAllFilters(fgm);
fgm = null;
}
DisposeDevice(); // CF2
LeaveRtpSession(); // CF1
}
/// <summary>
/// Disable DirectX Video Acceleration.
/// </summary>
/// <param name="fgm"></param>
public static void DisableDXVA(FilgraphManagerClass fgm)
{
// Retrieve WM decoder so we can turn off DXVA
IBaseFilter decoder = Filter.FindBaseFilterByName(fgm, "WMVideo Decoder DMO");
if (decoder == null)
{
return;
}
// Remove the renderer and everything back to the decoder
IFilterGraph iFG = (IFilterGraph)fgm;
IEnumFilters iEnum;
iFG.EnumFilters(out iEnum);
uint fetched;
IBaseFilter iBF;
iEnum.Next(1, out iBF, out fetched);
List <IBaseFilter> toRemove = new List <IBaseFilter>();
/// A base assumption is that the first items returned by the enumerator
/// are the video renderer and other filters upstream to the video decoder.
/// This should be true if these filters were the most recently added.
/// Otherwise it would break in some contexts, including that of graphs with multiple branches.
while (fetched == 1 && (Filter.Name(iBF) != Filter.Name(decoder)))
{
toRemove.Add(iBF);
iEnum.Next(1, out iBF, out fetched);
}
foreach (IBaseFilter ibf in toRemove)
{
iFG.RemoveFilter(ibf);
}
// Try turning off DXVA
try
{
IPropertyBag iPB = (IPropertyBag)decoder;
object o = false;
iPB.Write(WM9PropList.g_wszWMVCDXVAEnabled, ref o);
}
catch (Exception e) { Console.WriteLine(e.ToString()); } // Might be WM7 instead of WM9
// Render again
((IGraphBuilder)fgm).Render(Filter.GetPin(decoder, _PinDirection.PINDIR_OUTPUT,
Guid.Empty, Guid.Empty, false, 0));
}
public override bool RemoveCapability(ICapability capability)
{
bool ret = base.RemoveCapability (capability);
if(ret)
{
ssc = null;
fgm.Stop();
FilterGraph.RemoveAllFilters(fgm);
fgm = null;
}
return ret;
}
public override bool RemoveCapability(ICapability capability)
{
bool ret = base.RemoveCapability(capability);
if (ret)
{
ssc = null;
fgm.Stop();
FilterGraph.RemoveAllFilters(fgm);
fgm = null;
}
return(ret);
}
void InitInterfaces()
{
try
{
Filgraph = new FilgraphManagerClass();
MediaControl = Filgraph as IMediaControl;
MediaEvent = Filgraph as IMediaEventEx;
MediaPosition = Filgraph as IMediaPosition;
VideoWindow = Filgraph as IVideoWindow;
}
catch (Exception)
{
MessageBox.Show("Couldn't start");
}
}
/// <summary>
/// Disable DirectX Video Acceleration.
/// </summary>
/// <param name="fgm"></param>
public static void DisableDXVA(FilgraphManagerClass fgm)
{
// Retrieve WM decoder so we can turn off DXVA
IBaseFilter decoder = Filter.FindBaseFilterByName(fgm, "WMVideo Decoder DMO");
if(decoder == null)
{
return;
}
// Remove the renderer and everything back to the decoder
IFilterGraph iFG = (IFilterGraph)fgm;
IEnumFilters iEnum;
iFG.EnumFilters(out iEnum);
uint fetched;
IBaseFilter iBF;
iEnum.Next(1, out iBF, out fetched);
List<IBaseFilter> toRemove = new List<IBaseFilter>();
/// A base assumption is that the first items returned by the enumerator
/// are the video renderer and other filters upstream to the video decoder.
/// This should be true if these filters were the most recently added.
/// Otherwise it would break in some contexts, including that of graphs with multiple branches.
while(fetched == 1 && (Filter.Name(iBF) != Filter.Name(decoder)))
{
toRemove.Add(iBF);
iEnum.Next(1, out iBF, out fetched);
}
foreach (IBaseFilter ibf in toRemove) {
iFG.RemoveFilter(ibf);
}
// Try turning off DXVA
try
{
IPropertyBag iPB = (IPropertyBag)decoder;
object o = false;
iPB.Write(WM9PropList.g_wszWMVCDXVAEnabled, ref o);
}
catch(Exception e){Console.WriteLine(e.ToString());} // Might be WM7 instead of WM9
// Render again
((IGraphBuilder)fgm).Render(Filter.GetPin(decoder, _PinDirection.PINDIR_OUTPUT,
Guid.Empty, Guid.Empty, false, 0));
}
private void Cleanup()
{
if (fgm != null)
{
fgm.Stop();
FilterGraph.RemoveAllFilters(fgm);
FilterGraph.RemoveFromRot(rotID);
iGB = null;
iFG = null;
fgm = null;
}
DisposeSource();
DisposeCompressor();
DisposeRenderer();
}
public static void Main(string[] args)
{
FilgraphManagerClass graphClass = null;
try
{
graphClass = new FilgraphManagerClass();
graphClass.RenderFile(@"C:\Users\Ryuzaki\Desktop\AviTokaiNoHitorigurashi.avi");
graphClass.Run();
int evCode;
graphClass.WaitForCompletion(-1, out evCode);
}
catch (Exception) { }
finally
{
graphClass = null;
}
}
void CloseInterfaces()
{
if (MediaControl != null)
{
MediaControl.StopWhenReady();
MediaEvent.SetNotifyWindow((int)0, cWindowStyle.WM_GRAPHNOTIFY, (int)0);
}
MediaControl = null;
MediaEvent = null;
MediaPosition = null;
VideoWindow = null;
if (Filgraph != null)
{
System.Runtime.InteropServices.Marshal.ReleaseComObject(this.Filgraph);
}
Filgraph = null;
}
/// <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();
}
}
}
public static void DisableDXVA(FilgraphManagerClass fgm)
{
// Retrieve WM decoder so we can turn off DXVA
IBaseFilter decoder = Filter.FindBaseFilterByName(fgm, "WMVideo Decoder DMO");
if (decoder == null)
{
return;
}
// Remove the renderer and everything back to the decoder
IFilterGraph iFG = (IFilterGraph)fgm;
IEnumFilters iEnum;
iFG.EnumFilters(out iEnum);
uint fetched;
IBaseFilter iBF;
iEnum.Next(1, out iBF, out fetched);
while (fetched == 1 && (Filter.Name(iBF) != Filter.Name(decoder)))
{
// Remove filter from graph
iFG.RemoveFilter(iBF);
// Because the state of the enumerator has changed (item was removed from collection)
iEnum.Reset();
iEnum.Next(1, out iBF, out fetched);
}
// Try turning off DXVA
try
{
IPropertyBag iPB = (IPropertyBag)decoder;
object o = false;
iPB.Write(WM9PropList.g_wszWMVCDXVAEnabled, ref o);
}
catch (Exception e) { Console.WriteLine(e.ToString()); } // Might be WM7 instead of WM9
// Render again
((IGraphBuilder)fgm).Render(Filter.GetPin(decoder, _PinDirection.PINDIR_OUTPUT,
Guid.Empty, Guid.Empty, false, 0));
}
/// <summary>
/// Removes all filters from a graph
///
/// Important Note:
/// If this method goes into an infinite loop, it is most likely because you are trying to
/// remove a filter from a different thread than the one that added the filter, and your
/// app was launched with the STAThreaded attribute on the Main method.
///
/// Either use MTAThreaded attribute, or remove filter from the same thread it was added.
/// </summary>
public static void RemoveAllFilters( FilgraphManagerClass fgm)
{
IFilterGraph iFG = (IFilterGraph)fgm;
IEnumFilters iEnum;
iFG.EnumFilters(out iEnum);
uint fetched;
IBaseFilter iBF;
iEnum.Next(1, out iBF, out fetched);
while(fetched == 1)
{
// Remove filter from graph
iFG.RemoveFilter(iBF);
// Because the state of the enumerator has changed (item was removed from collection)
iEnum.Reset();
iEnum.Next(1, out iBF, out fetched);
}
}
/// <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();
}
}
private void CreateReceivingGraph()
{
// Tell the stream we will poll it for data with our own (DShow) thread
// Instead of receiving data through the FrameReceived event
rtpStream.IsUsingNextFrame = true;
// Create receiving filtergraph
fgm = new FilgraphManagerClass();
IGraphBuilder iGB = (IGraphBuilder)fgm;
IBaseFilter rtpSource = RtpSourceClass.CreateInstance();
((MSR.LST.MDShow.Filters.IRtpSource)rtpSource).Initialize(rtpStream);
iGB.AddFilter(rtpSource, "RtpSource");
iGB.Render(Filter.GetPin(rtpSource, _PinDirection.PINDIR_OUTPUT, Guid.Empty,
Guid.Empty, false, 0));
VideoWindow();
fgm.Run();
}
protected CaptureGraph(FilterInfo fiSource)
{
try
{
// Fgm initialization
fgm = new FilgraphManagerClass();
iFG = (IFilterGraph)fgm;
iGB = (IGraphBuilder)fgm;
rotID = FilterGraph.AddToRot(iGB);
// Create source filter and initialize it
source = (SourceFilter)Filter.CreateFilter(fiSource);
iGB.AddFilter(source.BaseFilter, source.FriendlyName);
source.AddedToGraph(fgm);
}
catch(Exception)
{
Cleanup();
throw;
}
}
protected CaptureGraph(FilterInfo fiSource)
{
try
{
// Fgm initialization
fgm = new FilgraphManagerClass();
iFG = (IFilterGraph)fgm;
iGB = (IGraphBuilder)fgm;
rotID = FilterGraph.AddToRot(iGB);
// Create source filter and initialize it
source = (SourceFilter)Filter.CreateFilter(fiSource);
iGB.AddFilter(source.BaseFilter, source.FriendlyName);
source.AddedToGraph(fgm);
}
catch (Exception)
{
Cleanup();
throw;
}
}
/// <summary>
/// Removes all filters from a graph
///
/// Important Note:
/// If this method goes into an infinite loop, it is most likely because you are trying to
/// remove a filter from a different thread than the one that added the filter, and your
/// app was launched with the STAThreaded attribute on the Main method.
///
/// Either use MTAThreaded attribute, or remove filter from the same thread it was added.
/// </summary>
public static void RemoveAllFilters(FilgraphManagerClass fgm)
{
IFilterGraph iFG = (IFilterGraph)fgm;
IEnumFilters iEnum;
iFG.EnumFilters(out iEnum);
uint fetched;
IBaseFilter iBF;
iEnum.Next(1, out iBF, out fetched);
while (fetched == 1)
{
// Remove filter from graph
iFG.RemoveFilter(iBF);
// Because the state of the enumerator has changed (item was removed from collection)
iEnum.Reset();
iEnum.Next(1, out iBF, out fetched);
}
}
/// <summary>
/// Remove all filters from a graph. If the graph is running, we will stop it first.
/// </summary>
/// <returns></returns>
public bool Teardown()
{
if (fgm == null)
{
playing = false;
return(true);
}
if (playing)
{
try
{
//If stream is paused Stop will hang unless we first call
//RtpStream.UnblockNextFrame
if (this.stream != null)
{
this.stream.UnblockNextFrame();
}
if (rotnum != 0)
{
FilterGraph.RemoveFromRot((uint)rotnum); //RemoveFromRot(rotnum);
}
fgm.Stop();
}
catch (Exception e)
{
Debug.WriteLine("Failed to stop graph: " + e.ToString());
}
playing = false;
}
FilterGraph.RemoveAllFilters(fgm);
fgm = null;
return(true);
}
protected CaptureGraph(FilterInfo fiSource)
{
try
{
// Fgm initialization
fgm = new FilgraphManagerClass();
iFG = (IFilterGraph)fgm;
iGB = (IGraphBuilder)fgm;
rotID = FilterGraph.AddToRot(iGB);
// Create source filter and initialize it
source = (SourceFilter)Filter.CreateFilter(fiSource);
iGB.AddFilter(source.BaseFilter, source.FriendlyName);
source.AddedToGraph(fgm);
// Pass flags to the RtpRenderer filter from the config file.
this.rtpRendererFlags = 0;
string setting = ConfigurationManager.AppSettings[AppConfig.MDS_RtpRendererFlags];
if (!String.IsNullOrEmpty(setting)) {
if (!byte.TryParse(setting,out rtpRendererFlags)) {
rtpRendererFlags = 0;
}
}
}
catch(Exception)
{
Cleanup();
throw;
}
}
private void Cleanup()
{
if(fgm != null)
{
fgm.Stop();
FilterGraph.RemoveAllFilters(fgm);
FilterGraph.RemoveFromRot(rotID);
iGB = null;
iFG = null;
fgm = null;
}
DisposeSource();
DisposeCompressor();
DisposeRenderer();
}
public override bool RemoveCapability(ICapability capability)
{
bool ret = base.RemoveCapability(capability);
if (ret)
{
if (fgm != null)
{
fgm.Stop();
FilterGraph.RemoveFromRot(rotID);
FilterGraph.RemoveAllFilters(fgm);
fgm = null;
}
if (fgmEventMonitor != null)
{
fgmEventMonitor.FgmEvent -= new FgmEventMonitor.FgmEventHandler(FgmEvent);
fgmEventMonitor.Dispose();
fgmEventMonitor = null;
}
wmf = null;
}
return ret;
}
private void InitCaptureInterface()
{
// release com object (useless here but can't hurt)
Cleanup(true);
this.fmc = new FilgraphManagerClass();
// create the cg object and add the filter graph to it
Type t = Type.GetTypeFromCLSID(CLSID_CaptureGraphBuilder2);
this.icgb = (ICaptureGraphBuilder2)Activator.CreateInstance(t);
t = Type.GetTypeFromCLSID(CLSID_SampleGrabber);
this.isg = (ISampleGrabber)Activator.CreateInstance(t);
// source filter (the capture device)
this.sf = (IBaseFilter)this.SourceFilterList[this.cbxDevice.SelectedIndex];
// sample grabber filter
this.sgf = (IBaseFilter)this.isg;
object o = null;
this.icgb.RemoteFindInterface(ref PIN_CATEGORY_CAPTURE, ref MEDIATYPE_Video, sf, ref IID_IAMStreamConfig, out o);
this.iamsc = (IAMStreamConfig)o;
// set sample grabber media type
this.SGMediaType = new _AMMediaType();
this.SGMediaType.majortype = MEDIATYPE_Video;
this.SGMediaType.subtype = MEDIASUBTYPE_RGB24;
this.SGMediaType.formattype = FORMAT_VideoInfo;
this.isg.SetMediaType(ref SGMediaType);
this.isg.SetOneShot(0);
this.isg.SetBufferSamples(1);
}
/// <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();
}
}
/// <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 Direct Show 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();
}
}
}
public static void DisableDXVA(FilgraphManagerClass fgm)
{
// Retrieve WM decoder so we can turn off DXVA
IBaseFilter decoder = Filter.FindBaseFilterByName(fgm, "WMVideo Decoder DMO");
if(decoder == null)
{
return;
}
// Remove the renderer and everything back to the decoder
IFilterGraph iFG = (IFilterGraph)fgm;
IEnumFilters iEnum;
iFG.EnumFilters(out iEnum);
uint fetched;
IBaseFilter iBF;
iEnum.Next(1, out iBF, out fetched);
while(fetched == 1 && (Filter.Name(iBF) != Filter.Name(decoder)))
{
// Remove filter from graph
iFG.RemoveFilter(iBF);
// Because the state of the enumerator has changed (item was removed from collection)
iEnum.Reset();
iEnum.Next(1, out iBF, out fetched);
}
// Try turning off DXVA
try
{
IPropertyBag iPB = (IPropertyBag)decoder;
object o = false;
iPB.Write(WM9PropList.g_wszWMVCDXVAEnabled, ref o);
}
catch(Exception e){Console.WriteLine(e.ToString());} // Might be WM7 instead of WM9
// Render again
((IGraphBuilder)fgm).Render(Filter.GetPin(decoder, _PinDirection.PINDIR_OUTPUT,
Guid.Empty, Guid.Empty, false, 0));
}
private void CreateReceivingGraph()
{
// Tell the stream we will poll it for data with our own (DShow) thread
// Instead of receiving data through the FrameReceived event
rtpStream.IsUsingNextFrame = true;
// Create receiving filtergraph
fgm = new FilgraphManagerClass();
IGraphBuilder iGB = (IGraphBuilder)fgm;
IBaseFilter rtpSource = RtpSourceClass.CreateInstance();
((MSR.LST.MDShow.Filters.IRtpSource)rtpSource).Initialize(rtpStream);
iGB.AddFilter(rtpSource, "RtpSource");
iGB.Render(Filter.GetPin(rtpSource, _PinDirection.PINDIR_OUTPUT, Guid.Empty,
Guid.Empty, false, 0));
VideoWindow();
fgm.Run();
}
// CF3, CF2, CF1
private void Cleanup()
{
// CF3, Quit processing received data
if(fgm != null)
{
rtpStream.UnblockNextFrame();
fgm.Stop();
FilterGraph.RemoveAllFilters(fgm);
fgm = null;
}
DisposeDevice(); // CF2
LeaveRtpSession(); // CF1
}
/// <summary>
/// Build a graph with sampleGrabber. Render it, and get the media type.
/// </summary>
/// <param name="payload"></param>
/// <returns></returns>
public bool Build(PayloadType payload, RtpStream newStream)
{
this.stream = newStream;
this.ssrc = newStream.SSRC;
//Required as of RC3:
this.stream.IsUsingNextFrame = true;
if ((ssrc == 0) || !((payload == PayloadType.dynamicVideo) || (payload == PayloadType.dynamicAudio)))
{
errorMsg = "Invalid inputs to build method.";
return(false);
}
fgm = new FilgraphManagerClass();
MSR.LST.MDShow.IBaseFilter bfSource = null;
IGraphBuilder iGB = (IGraphBuilder)fgm;
//if (false)
// rotnum = FilterGraph.AddToRot(iGB); //AddToRot(iGB);
try
{
bfSource = RtpSourceClass.CreateInstance();
((MSR.LST.MDShow.Filters.IRtpSource)bfSource).Initialize(this.stream);
iGB.AddFilter(bfSource, "RtpSource");
MSR.LST.MDShow.IPin sourceOutput = Filter.GetPin(bfSource, _PinDirection.PINDIR_OUTPUT, Guid.Empty,
Guid.Empty, false, 0);
//Add SampleGrabber filter
MSR.LST.MDShow.IBaseFilter bfGrabber = SampleGrabberClass.CreateInstance();
iGB.AddFilter(bfGrabber, "Grabber");
UW.CSE.MDShow.ISampleGrabber sgGrabber = (UW.CSE.MDShow.ISampleGrabber)bfGrabber;
//Set mediatype
UW.CSE.MDShow._AMMediaType mt = new UW.CSE.MDShow._AMMediaType();
if (payload == PayloadType.dynamicVideo)
{
mt.majortype = MediaType.MajorType.MEDIATYPE_Video;
//PRI2: RGB24 seems to work for all video? We have used YUY2 in the past, but that won't work
// for screen streaming. Probably could use more testing
//mt.subtype = MediaType.SubType.MEDIASUBTYPE_YUY2;
mt.subtype = MediaType.SubType.MEDIASUBTYPE_RGB24;
}
else
{
mt.majortype = MediaType.MajorType.MEDIATYPE_Audio;
mt.subtype = MediaType.SubType.MEDIASUBTYPE_PCM; //MEDIASUBTYPE_PCM;
}
sgGrabber.SetMediaType(ref mt);
//Add samplegrabber callback
//0 is sampleCB, 1 is bufferCB. Only bufferCB is actually returning data so far.
sgGrabber.SetCallback(callBack, 1);
sgGrabber.SetOneShot(0);
sgGrabber.SetBufferSamples(0);
iGB.Render(sourceOutput);
UW.CSE.MDShow._AMMediaType uwmt = new UW.CSE.MDShow._AMMediaType();
sgGrabber.GetConnectedMediaType(ref uwmt);
connectedMT = copy_AMMediaType(uwmt);
}
catch (Exception e)
{
errorMsg = e.Message;
Debug.WriteLine("Exception while building graph: " + e.ToString());
eventLog.WriteEntry("Exception while building graph: " + e.ToString(), EventLogEntryType.Error, 1001);
return(false);
}
return(true);
}
private void InitializeFgm()
{
fgm = new FilgraphManagerClass();
iGB = (IGraphBuilder)fgm;
rotID = FilterGraph.AddToRot(iGB);
iCGB2 = CaptureGraphBuilder2Class.CreateInstance();
iCGB2.SetFiltergraph(iGB);
}
