private void CreateFilters()
{
isValid = true;
// grabber
grabberVideo = new GrabberVideo(this);
grabberAudio = new GrabberAudio(this);
// objects
graphObject = null;
grabberObjectVideo = null;
grabberObjectAudio = null;
int sourceBaseVideoPinIndex = 0;
try {
// get type for filter graph
Type type = Type.GetTypeFromCLSID(Clsid.FilterGraph);
if (type == null)
{
throw new ApplicationException("Failed creating filter graph");
}
// create filter graph
graphObject = Activator.CreateInstance(type);
graph = (IGraphBuilder)graphObject;
// create source device's object
if (fileName.ToLower().EndsWith(".wmv"))
{
type = Type.GetTypeFromCLSID(Clsid.WMASFReader);
if (type == null)
{
throw new ApplicationException("Failed creating ASF Reader filter");
}
sourceBase = (IBaseFilter)Activator.CreateInstance(type);
IFileSourceFilter sourceFile = (IFileSourceFilter)sourceBase;
sourceFile.Load(fileName, null);
graph.AddFilter(sourceBase, "source");
sourceBaseVideoPinIndex = 1;
}
else
{
graph.AddSourceFilter(fileName, "source", out sourceBase);
if (sourceBase == null)
{
try {
type = Type.GetTypeFromCLSID(Clsid.AsyncReader);
if (type == null)
{
throw new ApplicationException("Failed creating Async Reader filter");
}
sourceBase = (IBaseFilter)Activator.CreateInstance(type);
IFileSourceFilter sourceFile = (IFileSourceFilter)sourceBase;
sourceFile.Load(fileName, null);
graph.AddFilter(sourceBase, "source");
} catch {
throw new ApplicationException("Failed creating source filter");
}
}
sourceBaseVideoPinIndex = 0;
}
// get type for sample grabber
type = Type.GetTypeFromCLSID(Clsid.SampleGrabber);
if (type == null)
{
throw new ApplicationException("Failed creating sample grabber");
}
// create sample grabber
grabberObjectVideo = Activator.CreateInstance(type);
sampleGrabberVideo = (ISampleGrabber)grabberObjectVideo;
grabberBaseVideo = (IBaseFilter)grabberObjectVideo;
// add grabber filters to graph
graph.AddFilter(grabberBaseVideo, "grabberVideo");
// set media type
AMMediaType mediaType = new AMMediaType {
MajorType = MediaType.Video,
SubType = MediaSubType.ARGB32 /* MediaSubType.RGB24 */
};
;
sampleGrabberVideo.SetMediaType(mediaType);
// connect pins
IPin outPin = Tools.GetOutPin(sourceBase, sourceBaseVideoPinIndex);
IPin inPin = Tools.GetInPin(grabberBaseVideo, 0);
if (graph.Connect(outPin, inPin) < 0)
{
throw new ApplicationException("Failed connecting sourceBase to grabberBaseVideo");
}
Marshal.ReleaseComObject(outPin);
Marshal.ReleaseComObject(inPin);
// get media type
if (sampleGrabberVideo.GetConnectedMediaType(mediaType) == 0)
{
VideoInfoHeader vih = (VideoInfoHeader)Marshal.PtrToStructure(mediaType.FormatPtr, typeof(VideoInfoHeader));
grabberVideo.Width = vih.BmiHeader.Width;
grabberVideo.Height = vih.BmiHeader.Height;
mediaType.Dispose();
}
if (useAudioGrabber)
{
// *****************************************************************
// ******** Add the audio grabber to monitor audio peaks ***********
bool audioGrabberIsConnected = false;
Tools.FilterInfo2 filterInfo2 = Tools.GetNextFilter(sourceBase, PinDirection.Output, 0);
foreach (Tools.PinInfo2 pinInfo2 in filterInfo2.Pins)
{
if (pinInfo2.PinInfo.Direction == PinDirection.Output)
{
if (!Tools.IsPinConnected(pinInfo2.Pin))
{
try {
graph.Render(pinInfo2.Pin);
AMMediaType mt = new AMMediaType();
pinInfo2.Pin.ConnectionMediaType(mt);
if (mt.MajorType == MediaType.Audio)
{
// Obtain a reference to the filter connected to the audio output of the video splitter (usually, this is the audio decoder)
Tools.FilterInfo2 decoderFilterInfo2 = Tools.GetNextFilter(pinInfo2.PinInfo.Filter, PinDirection.Output, 0);
// Remove all the filters connected to the audio decoder filter
System.Collections.Generic.List <Tools.FilterInfo2> filtersInfo2 = new System.Collections.Generic.List <Tools.FilterInfo2>();
Tools.FilterInfo2 testFilterInfo2 = Tools.GetNextFilter(decoderFilterInfo2.Filter, PinDirection.Output, 0);
while (true)
{
filtersInfo2.Add(testFilterInfo2);
testFilterInfo2 = Tools.GetNextFilter(testFilterInfo2.Filter, PinDirection.Output, 0);
if (testFilterInfo2.Filter == null)
{
break;
}
}
foreach (Tools.FilterInfo2 fi2 in filtersInfo2)
{
graph.RemoveFilter(fi2.Filter);
fi2.Release();
}
// get type for sample grabber
type = Type.GetTypeFromCLSID(Clsid.SampleGrabber);
if (type == null)
{
throw new ApplicationException("Failed creating audio sample grabber");
}
// create sample grabber
grabberObjectAudio = Activator.CreateInstance(type);
sampleGrabberAudio = (ISampleGrabber)grabberObjectAudio;
grabberBaseAudio = (IBaseFilter)grabberObjectAudio;
// add grabber filters to graph
graph.AddFilter(grabberBaseAudio, "grabberAudio");
// set media type
AMMediaType mediaTypeAudio = new AMMediaType {
MajorType = MediaType.Audio,
SubType = MediaSubType.PCM,
FormatType = FormatType.WaveEx
};
sampleGrabberAudio.SetMediaType(mediaTypeAudio);
outPin = Tools.GetOutPin(decoderFilterInfo2.Filter, 0);
inPin = Tools.GetInPin(grabberBaseAudio, 0);
if (graph.Connect(outPin, inPin) < 0)
{
throw new ApplicationException("Failed connecting filter to grabberBaseAudio");
}
Marshal.ReleaseComObject(outPin);
Marshal.ReleaseComObject(inPin);
// Finally, connect the grabber to the audio renderer
outPin = Tools.GetOutPin(grabberBaseAudio, 0);
graph.Render(outPin);
mt = new AMMediaType();
outPin.ConnectionMediaType(mt);
if (!Tools.IsPinConnected(outPin))
{
throw new ApplicationException("Failed obtaining media audio information");
}
wavFormat = new WaveFormatEx();
Marshal.PtrToStructure(mt.FormatPtr, wavFormat);
Marshal.ReleaseComObject(outPin);
// configure sample grabber
sampleGrabberAudio.SetBufferSamples(false);
sampleGrabberAudio.SetOneShot(false);
sampleGrabberAudio.SetCallback(grabberAudio, 1);
audioGrabberIsConnected = true;
break;
}
} catch {
}
}
}
}
filterInfo2.Release();
if (!audioGrabberIsConnected)
{
foreach (Tools.PinInfo2 pinInfo2 in Tools.GetPins(sourceBase))
{
if (!Tools.IsPinConnected(pinInfo2.Pin))
{
foreach (AMMediaType mt in Tools.GetMediaTypes(pinInfo2.Pin))
{
if (mt.MajorType == MediaType.Audio)
{
// create sample grabber
grabberObjectAudio = Activator.CreateInstance(type);
sampleGrabberAudio = (ISampleGrabber)grabberObjectAudio;
grabberBaseAudio = (IBaseFilter)grabberObjectAudio;
// add grabber filters to graph
graph.AddFilter(grabberBaseAudio, "grabberAudio");
// set media type
AMMediaType mediaTypeAudio = new AMMediaType {
MajorType = MediaType.Audio,
SubType = MediaSubType.PCM,
FormatType = FormatType.WaveEx
};
sampleGrabberAudio.SetMediaType(mediaTypeAudio);
inPin = Tools.GetInPin(grabberBaseAudio, 0);
if (graph.Connect(pinInfo2.Pin, inPin) < 0)
{
throw new ApplicationException("Failed connecting sourceBase to grabberBaseVideo");
}
Marshal.ReleaseComObject(inPin);
// Finally, connect the grabber to the audio renderer
outPin = Tools.GetOutPin(grabberBaseAudio, 0);
graph.Render(outPin);
AMMediaType amt = new AMMediaType();
outPin.ConnectionMediaType(amt);
if (!Tools.IsPinConnected(outPin))
{
throw new ApplicationException("Failed obtaining media audio information");
}
wavFormat = new WaveFormatEx();
Marshal.PtrToStructure(amt.FormatPtr, wavFormat);
Marshal.ReleaseComObject(outPin);
// configure sample grabber
sampleGrabberAudio.SetBufferSamples(false);
sampleGrabberAudio.SetOneShot(false);
sampleGrabberAudio.SetCallback(grabberAudio, 1);
audioGrabberIsConnected = true;
break;
}
}
}
}
}
// *****************************************************************
}
// let's do the rendering, if we don't need to prevent freezing
if (!preventFreezing)
{
// render pin
graph.Render(Tools.GetOutPin(grabberBaseVideo, 0));
// configure video window
IVideoWindow window = (IVideoWindow)graphObject;
window.put_AutoShow(false);
window = null;
}
// configure sample grabber
sampleGrabberVideo.SetBufferSamples(false);
sampleGrabberVideo.SetOneShot(false);
sampleGrabberVideo.SetCallback(grabberVideo, 1);
// disable clock, if someone requested it
if (!referenceClockEnabled)
{
IMediaFilter mediaFilter = (IMediaFilter)graphObject;
mediaFilter.SetSyncSource(null);
}
// get media control
mediaControl = (IMediaControl)graphObject;
// get media seek control
mediaSeekControl = (IMediaSeeking)graphObject;
// get media events' interface
mediaEvent = (IMediaEventEx)graphObject;
// get media audio control
basicAudio = (IBasicAudio)graphObject;
} catch (Exception exception) {
DestroyFilters();
// provide information to clients
VideoSourceError?.Invoke(this, new VideoSourceErrorEventArgs(exception.Message));
}
}
private void CreateFilters(Guid audioSubType)
{
isValid = false;
int r;
// grabber
grabberAudio = new GrabberAudio(this);
// objects
graphObject = null;
grabberObjectAudio = null;
try {
// get type for filter graph
Type type = Type.GetTypeFromCLSID(Clsid.FilterGraph);
if (type == null)
{
throw new ApplicationException("Failed creating filter graph");
}
// create filter graph
graphObject = Activator.CreateInstance(type);
graph = (IGraphBuilder)graphObject;
// create source device's object
r = graph.AddSourceFilter(fileName, "source", out sourceBase);
if (sourceBase == null)
{
throw new ApplicationException("Failed creating source filter");
}
// get type for sample grabber
type = Type.GetTypeFromCLSID(Clsid.SampleGrabber);
if (type == null)
{
throw new ApplicationException("Failed creating sample grabber");
}
// create sample grabber
grabberObjectAudio = Activator.CreateInstance(type);
sampleGrabberAudio = (ISampleGrabber)grabberObjectAudio;
grabberBaseAudio = (IBaseFilter)grabberObjectAudio;
// add grabber filters to graph
r = graph.AddFilter(grabberBaseAudio, "grabberAudio");
// set media type
AMMediaType mediaType = new AMMediaType {
MajorType = MediaType.Audio,
SubType = audioSubType,
FormatType = FormatType.WaveEx
};
r = sampleGrabberAudio.SetMediaType(mediaType);
// render pin
// TODO: Improve this! We can't always assume that the second pin will always be the audio pin -- we need to find it.
IPin sbPin = Tools.GetOutPin(sourceBase, 1);
if (sbPin == null)
{
sbPin = Tools.GetOutPin(sourceBase, 0);
}
r = graph.Render(sbPin);
IPin outPin = Tools.GetOutPin(grabberBaseAudio, 0);
AMMediaType mt = new AMMediaType();
r = outPin.ConnectionMediaType(mt);
if (!Tools.IsPinConnected(outPin))
{
throw new ApplicationException("Failed obtaining media information");
}
// disable clock, if someone requested it
if (!referenceClockEnabled)
{
IMediaFilter mediaFilter = (IMediaFilter)graphObject;
r = mediaFilter.SetSyncSource(null);
}
wavFormat = new WaveFormatEx();
Marshal.PtrToStructure(mt.FormatPtr, wavFormat);
Marshal.ReleaseComObject(outPin);
// configure sample grabber
r = sampleGrabberAudio.SetBufferSamples(false);
r = sampleGrabberAudio.SetOneShot(false);
r = sampleGrabberAudio.SetCallback(grabberAudio, 1);
if (useNullRenderer)
{
// Get a list of all the filters connected to the sample grabber
List <Tools.FilterInfo2> filtersInfo2 = new List <Tools.FilterInfo2>();
Tools.FilterInfo2 testFilterInfo2 = Tools.GetNextFilter(grabberBaseAudio, PinDirection.Output, 0);
while (true)
{
filtersInfo2.Add(testFilterInfo2);
testFilterInfo2 = Tools.GetNextFilter(testFilterInfo2.Filter, PinDirection.Output, 0);
if (testFilterInfo2.Filter == null)
{
break;
}
}
// Remove the last filter, the audio renderer
r = graph.RemoveFilter(filtersInfo2[filtersInfo2.Count - 1].Filter);
// create null renderer
type = Type.GetTypeFromCLSID(Clsid.NullRenderer);
if (type == null)
{
throw new ApplicationException("Failed creating null renderer");
}
nullRendererObjectAudio = Activator.CreateInstance(type);
IBaseFilter nullRendererAudio = (IBaseFilter)nullRendererObjectAudio;
// add grabber filters to graph
r = graph.AddFilter(nullRendererAudio, "nullRenderer");
//outPin = Tools.GetOutPin(filtersInfo2[filtersInfo2.Count - 2].Filter, 0);
outPin = Tools.GetOutPin(grabberBaseAudio, 0);
IPin inPin = Tools.GetInPin(nullRendererAudio, 0);
if (graph.Connect(outPin, inPin) < 0)
{
throw new ApplicationException("Failed obtaining media audio information");
}
Marshal.ReleaseComObject(outPin);
Marshal.ReleaseComObject(inPin);
}
// configure video window
IVideoWindow window = (IVideoWindow)graphObject;
if (window != null)
{
window.put_AutoShow(false);
window = null;
}
// get media control
mediaControl = (IMediaControl)graphObject;
// get media seek control
mediaSeekControl = (IMediaSeeking)graphObject;
mediaSeekControl.SetTimeFormat(TimeFormat.MediaTime);
// get media events' interface
mediaEvent = (IMediaEventEx)graphObject;
// get media audio control
basicAudio = (IBasicAudio)graphObject;
isValid = true;
} catch (Exception exception) {
DestroyFilters();
// provide information to clients
AudioSourceError?.Invoke(this, new AudioSourceErrorEventArgs(exception.Message));
}
}
