void SetupPlaybackGraph(string fname)
{
int hr;
try
{
hr = graphBuilder.RenderFile(fname, null);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
AMMediaType media = new AMMediaType();
media.majorType = MediaType.Video;
media.subType = MediaSubType.RGB24;
media.formatType = FormatType.VideoInfo; // ???
hr = sampGrabber.SetMediaType(media);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
hr = graphBuilder.AddFilter(baseGrabFlt, "Ds.NET Grabber");
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
hr = graphBuilder.AddFilter(smartTee, "smartTee");
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
IBaseFilter renderer;
hr = graphBuilder.FindFilterByName("Video Renderer", out renderer);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
IPin inPin;
IPin srcPin;
hr = DsUtils.GetPin(renderer, PinDirection.Input, out inPin, 0);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
hr = inPin.ConnectedTo(out srcPin);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
hr = srcPin.Disconnect();
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
hr = graphBuilder.RemoveFilter(renderer);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
Marshal.ReleaseComObject(renderer);
Marshal.ReleaseComObject(inPin);
hr = DsUtils.GetPin(smartTee, PinDirection.Input, out inPin, 0);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
hr = graphBuilder.Connect(srcPin, inPin);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
Marshal.ReleaseComObject(srcPin);
Marshal.ReleaseComObject(inPin);
srcPin = inPin = null;
hr = DsUtils.GetPin(smartTee, PinDirection.Output, out srcPin, 1);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
// grabber Input
hr = DsUtils.GetPin(baseGrabFlt, PinDirection.Input, out inPin, 0);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
// smartTee -> grabber
hr = graphBuilder.Connect(srcPin, inPin);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
Marshal.ReleaseComObject(srcPin);
Marshal.ReleaseComObject(inPin);
srcPin = inPin = null;
if (preview)
{
// grabber Input
hr = DsUtils.GetPin(smartTee, PinDirection.Output, out srcPin, 0);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
hr = graphBuilder.Render(srcPin);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
Marshal.ReleaseComObject(srcPin);
srcPin = null;
}
media = new AMMediaType();
hr = sampGrabber.GetConnectedMediaType(media);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
if ((media.formatType != FormatType.VideoInfo) || (media.formatPtr == IntPtr.Zero))
{
throw new NotSupportedException("Unknown Grabber Media Format");
}
videoInfoHeader = (VideoInfoHeader)Marshal.PtrToStructure(media.formatPtr, typeof(VideoInfoHeader));
Marshal.FreeCoTaskMem(media.formatPtr);
media.formatPtr = IntPtr.Zero;
//Modified according to the platform SDK, to capture the buffer
hr = sampGrabber.SetBufferSamples(false);
if (hr == 0)
{
hr = sampGrabber.SetOneShot(false);
}
if (hr == 0)
{
hr = sampGrabber.SetCallback(sampleGrabber, 1);
}
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
}
catch (Exception ee)
{
throw new Exception("Could not setup graph\r\n" + ee.Message);
}
}
/// <summary>
/// Creates a new Video Player. Automatically creates the required Texture2D on the specificied GraphicsDevice.
/// </summary>
/// <param name="FileName">The video file to open</param>
/// <param name="graphicsDevice">XNA Graphics Device</param>
public VideoPlayer(string FileName, GraphicsDevice graphicsDevice)
{
try
{
// Set video state
currentState = VideoState.Stopped;
// Store Filename
filename = FileName;
// Open DirectShow Interfaces
InitInterfaces();
// Create a SampleGrabber Filter and add it to the FilterGraph
SampleGrabber sg = new SampleGrabber();
ISampleGrabber sampleGrabber = (ISampleGrabber)sg;
DsError.ThrowExceptionForHR(gb.AddFilter((IBaseFilter)sg, "Grabber"));
// Setup Media type info for the SampleGrabber
AMMediaType mt = new AMMediaType();
mt.majorType = MEDIATYPE_Video; // Video
mt.subType = MEDIASUBTYPE_RGB24; // RGB24
mt.formatType = FORMAT_VideoInfo; // VideoInfo
DsError.ThrowExceptionForHR(sampleGrabber.SetMediaType(mt));
// Construct the rest of the FilterGraph
DsError.ThrowExceptionForHR(gb.RenderFile(filename, null));
// Set SampleGrabber Properties
DsError.ThrowExceptionForHR(sampleGrabber.SetBufferSamples(true));
DsError.ThrowExceptionForHR(sampleGrabber.SetOneShot(false));
DsError.ThrowExceptionForHR(sampleGrabber.SetCallback((ISampleGrabberCB)this, 1));
// Hide Default Video Window
IVideoWindow pVideoWindow = (IVideoWindow)gb;
DsError.ThrowExceptionForHR(pVideoWindow.put_AutoShow(OABool.False));
// Create AMMediaType to capture video information
AMMediaType MediaType = new AMMediaType();
DsError.ThrowExceptionForHR(sampleGrabber.GetConnectedMediaType(MediaType));
VideoInfoHeader pVideoHeader = new VideoInfoHeader();
Marshal.PtrToStructure(MediaType.formatPtr, pVideoHeader);
// Store video information
videoHeight = pVideoHeader.BmiHeader.Height;
videoWidth = pVideoHeader.BmiHeader.Width;
avgTimePerFrame = pVideoHeader.AvgTimePerFrame;
bitRate = pVideoHeader.BitRate;
DsError.ThrowExceptionForHR(ms.GetDuration(out videoDuration));
// Create byte arrays to hold video data
videoFrameBytes = new byte[(videoHeight * videoWidth) * 4]; // RGBA format (4 bytes per pixel)
bgrData = new byte[(videoHeight * videoWidth) * 3]; // BGR24 format (3 bytes per pixel)
// Create Output Frame Texture2D with the height and width of the video
outputFrame = new Texture2D(graphicsDevice, videoWidth, videoHeight, 1, TextureUsage.None, SurfaceFormat.Color);
}
catch
{
throw new Exception("Unable to Load or Play the video file");
}
}
// Thread entry point
public void WorkerThread()
{
// grabber
Grabber grabber = new Grabber(this);
// objects
object graphObj = null;
object sourceObj = null;
object grabberObj = null;
// interfaces
IGraphBuilder graph = null;
IBaseFilter sourceBase = null;
IBaseFilter grabberBase = null;
ISampleGrabber sg = null;
IMediaControl mc = null;
try
{
// Get type for filter graph
Type srvType = Type.GetTypeFromCLSID(Clsid.FilterGraph);
if (srvType == null)
{
throw new ApplicationException("Failed creating filter graph");
}
// create filter graph
graphObj = Activator.CreateInstance(srvType);
graph = (IGraphBuilder)graphObj;
int n = 0;
// create bind context
if (Win32.CreateBindCtx(0, out UCOMIBindCtx bindCtx) == 0)
{
// ----
// convert moniker`s string to a moniker
if (Win32.MkParseDisplayName(bindCtx, source, ref n, out UCOMIMoniker moniker) == 0)
{
// get device base filter
Guid filterId = typeof(IBaseFilter).GUID;
moniker.BindToObject(null, null, ref filterId, out sourceObj);
Marshal.ReleaseComObject(moniker);
moniker = null;
}
Marshal.ReleaseComObject(bindCtx);
bindCtx = null;
}
// ----
if (sourceObj == null)
{
throw new ApplicationException("Failed creating device object for moniker");
}
sourceBase = (IBaseFilter)sourceObj;
// Get type for sample grabber
srvType = Type.GetTypeFromCLSID(Clsid.SampleGrabber);
if (srvType == null)
{
throw new ApplicationException("Failed creating sample grabber");
}
// create sample grabber
grabberObj = Activator.CreateInstance(srvType);
sg = (ISampleGrabber)grabberObj;
grabberBase = (IBaseFilter)grabberObj;
// add source filter to graph
graph.AddFilter(sourceBase, "source");
graph.AddFilter(grabberBase, "grabber");
// set media type
AMMediaType mt = new AMMediaType
{
majorType = MediaType.Video,
subType = MediaSubType.RGB24
};
sg.SetMediaType(mt);
// connect pins
if (graph.Connect(DSTools.GetOutPin(sourceBase, 0), DSTools.GetInPin(grabberBase, 0)) < 0)
{
throw new ApplicationException("Failed connecting filters");
}
// get media type
if (sg.GetConnectedMediaType(mt) == 0)
{
VideoInfoHeader vih = (VideoInfoHeader)Marshal.PtrToStructure(mt.formatPtr, typeof(VideoInfoHeader));
System.Diagnostics.Debug.WriteLine("width = " + vih.BmiHeader.Width + ", height = " + vih.BmiHeader.Height);
grabber.Width = vih.BmiHeader.Width;
grabber.Height = vih.BmiHeader.Height;
mt.Dispose();
}
// render
graph.Render(DSTools.GetOutPin(grabberBase, 0));
//
sg.SetBufferSamples(false);
sg.SetOneShot(false);
sg.SetCallback(grabber, 1);
// window
IVideoWindow win = (IVideoWindow)graphObj;
win.put_AutoShow(false);
win = null;
// get media control
mc = (IMediaControl)graphObj;
// run
mc.Run();
while (!stopEvent.WaitOne(0, true))
{
Thread.Sleep(100);
}
mc.StopWhenReady();
}
// catch any exceptions
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine("----: " + e.Message);
}
// finalization block
finally
{
// release all objects
mc = null;
graph = null;
sourceBase = null;
grabberBase = null;
sg = null;
if (graphObj != null)
{
Marshal.ReleaseComObject(graphObj);
graphObj = null;
}
if (sourceObj != null)
{
Marshal.ReleaseComObject(sourceObj);
sourceObj = null;
}
if (grabberObj != null)
{
Marshal.ReleaseComObject(grabberObj);
grabberObj = null;
}
}
}
// Save the size parameters for use in SnapShot
private void SaveSizeInfo(ISampleGrabber sampGrabber)
{
int hr;
// Get the media type from the SampleGrabber
AMMediaType media = new AMMediaType();
hr = sampGrabber.GetConnectedMediaType(media);
DsError.ThrowExceptionForHR(hr);
try
{
if ((media.formatType != FormatType.VideoInfo) || (media.formatPtr == IntPtr.Zero))
{
throw new NotSupportedException("Unknown Grabber Media Format");
}
// Get the struct
VideoInfoHeader videoInfoHeader = new VideoInfoHeader();
Marshal.PtrToStructure(media.formatPtr, videoInfoHeader);
// Grab the size info
m_videoWidth = videoInfoHeader.BmiHeader.Width;
m_videoHeight = videoInfoHeader.BmiHeader.Height;
m_stride = videoInfoHeader.BmiHeader.ImageSize / m_videoHeight;
m_ImageSize = videoInfoHeader.BmiHeader.ImageSize;
}
finally
{
DsUtils.FreeAMMediaType(media);
media = null;
}
}
public void BuildGraph()
{
ICaptureGraphBuilder2 captureGraphBuilder2 = (ICaptureGraphBuilder2)null;
IBaseFilter ppFilter = (IBaseFilter)null;
ISampleGrabber sampleGrabber = (ISampleGrabber)null;
List <DeviceEnumerator> deviceEnumeratorList = (List <DeviceEnumerator>)null;
try
{
Logger.Info("Creating List of devices");
deviceEnumeratorList = DeviceEnumerator.ListDevices(Guids.VideoInputDeviceCategory);
}
catch (Exception ex)
{
Logger.Error("Exception in finding Video device. Err : {0}", (object)ex.ToString());
}
if (deviceEnumeratorList != null)
{
if (deviceEnumeratorList.Count != 0)
{
try
{
Logger.Info("found {0} Camera, Opening {1}", (object)deviceEnumeratorList.Count, (object)this.m_Unit);
DeviceEnumerator deviceEnumerator = this.m_Unit >= deviceEnumeratorList.Count ? deviceEnumeratorList[0] : deviceEnumeratorList[this.m_Unit];
this.m_FilterGraph = (IFilterGraph2) new FilterGraph();
this.m_mediaCtrl = this.m_FilterGraph as IMediaControl;
captureGraphBuilder2 = (ICaptureGraphBuilder2) new CaptureGraphBuilder2();
sampleGrabber = (ISampleGrabber) new SampleGrabber();
ErrorHandler errorHandler1 = (ErrorHandler)captureGraphBuilder2.SetFiltergraph((IGraphBuilder)this.m_FilterGraph);
if (errorHandler1.GetError() != 0)
{
Logger.Error("SetFiltergraph failed with {0:X}..", (object)errorHandler1.GetError());
}
ErrorHandler errorHandler2 = (ErrorHandler)this.m_FilterGraph.AddSourceFilterForMoniker(deviceEnumerator.Moniker, (IBindCtx)null, "Video input", out ppFilter);
if (errorHandler2.GetError() != 0)
{
Logger.Error("AddSourceFilterForMoniker failed with {0:X}", (object)errorHandler2.GetError());
}
AMMediaType pmt = new AMMediaType()
{
majorType = Guids.MediaTypeVideo
};
if (this.m_color == SupportedColorFormat.YUV2)
{
pmt.subType = Guids.MediaSubtypeYUY2;
}
else
{
if (this.m_color != SupportedColorFormat.RGB24)
{
throw new Exception("Unsupported color format");
}
pmt.subType = Guids.MediaSubtypeRGB24;
}
pmt.formatType = Guids.FormatTypesVideoInfo;
ErrorHandler errorHandler3 = (ErrorHandler)sampleGrabber.SetMediaType(pmt);
this.FreeAMMedia(pmt);
ErrorHandler errorHandler4 = (ErrorHandler)sampleGrabber.SetCallback((ISampleGrabberCB)this, 1);
if (errorHandler4.GetError() != 0)
{
Logger.Error("Grabber setcallback failed with {0:X}", (object)errorHandler4.GetError());
}
IBaseFilter baseFilter = (IBaseFilter)sampleGrabber;
ErrorHandler errorHandler5 = (ErrorHandler)this.m_FilterGraph.AddFilter(baseFilter, "FrameGrabber");
if (errorHandler5.GetError() != 0)
{
Logger.Error("AddFilter failed with {0:X}", (object)errorHandler5.GetError());
}
object ppint;
ErrorHandler errorHandler6 = (ErrorHandler)captureGraphBuilder2.FindInterface(Guids.PinCategoryCapture, Guids.MediaTypeVideo, ppFilter, typeof(IAMStreamConfig).GUID, out ppint);
if (errorHandler6.GetError() != 0)
{
Logger.Error("FindInterface failed with {0:X}", (object)errorHandler6.GetError());
}
if (!(ppint is IAMStreamConfig amStreamConfig))
{
throw new Exception("Stream config Error");
}
errorHandler3 = (ErrorHandler)amStreamConfig.GetFormat(out pmt);
VideoInfoHeader videoInfoHeader = new VideoInfoHeader();
Marshal.PtrToStructure(pmt.pbFormat, (object)videoInfoHeader);
videoInfoHeader.AvgTimePerFrame = (long)(10000000 / this.m_FrameRate);
videoInfoHeader.BmiHeader.Width = this.m_Width;
videoInfoHeader.BmiHeader.Height = this.m_Height;
Marshal.StructureToPtr((object)videoInfoHeader, pmt.pbFormat, false);
ErrorHandler errorHandler7 = (ErrorHandler)amStreamConfig.SetFormat(pmt);
if (errorHandler7.GetError() != 0)
{
Logger.Error("conf.setformat failed with {0:X}", (object)errorHandler7.GetError());
}
this.FreeAMMedia(pmt);
ErrorHandler errorHandler8 = (ErrorHandler)captureGraphBuilder2.RenderStream(Guids.PinCategoryCapture, Guids.MediaTypeVideo, (object)ppFilter, (IBaseFilter)null, baseFilter);
if (errorHandler8.GetError() != 0)
{
Logger.Error("RenderStream failed with {0:X}", (object)errorHandler8.GetError());
}
AMMediaType amMediaType = new AMMediaType();
errorHandler3 = (ErrorHandler)sampleGrabber.GetConnectedMediaType(amMediaType);
if (amMediaType.formatType != Guids.FormatTypesVideoInfo)
{
throw new ColorFormatNotSupported("Not able to connect to Video Media");
}
if (amMediaType.pbFormat == IntPtr.Zero)
{
throw new Exception("Format Array is null");
}
VideoInfoHeader structure = (VideoInfoHeader)Marshal.PtrToStructure(amMediaType.pbFormat, typeof(VideoInfoHeader));
this.m_Width = structure.BmiHeader.Width;
this.m_Height = structure.BmiHeader.Height;
this.m_Stride = this.m_Width * ((int)structure.BmiHeader.BitCount / 8);
if (this.m_Buffer == IntPtr.Zero)
{
this.m_Buffer = Marshal.AllocCoTaskMem(this.m_Stride * this.m_Height);
}
this.FreeAMMedia(amMediaType);
return;
}
catch
{
throw;
}
finally
{
if (ppFilter != null)
{
Marshal.ReleaseComObject((object)ppFilter);
}
if (sampleGrabber != null)
{
Marshal.ReleaseComObject((object)sampleGrabber);
}
if (captureGraphBuilder2 != null)
{
Marshal.ReleaseComObject((object)captureGraphBuilder2);
}
}
}
}
Logger.Info("CAMERA: Could not find a camera device!");
}
/// <summary> Read and store the properties </summary>
private void SaveSizeInfo(ISampleGrabber sampGrabber)
{
int hr;
// Get the media type from the SampleGrabber
AMMediaType media = new AMMediaType();
hr = sampGrabber.GetConnectedMediaType(media);
DsError.ThrowExceptionForHR(hr);
if ((media.formatType != FormatType.VideoInfo) || (media.formatPtr == IntPtr.Zero))
{
throw new NotSupportedException("Unknown Grabber Media Format");
}
// Grab the size info
VideoInfoHeader videoInfoHeader = (VideoInfoHeader)Marshal.PtrToStructure(media.formatPtr, typeof(VideoInfoHeader));
m_videoWidth = videoInfoHeader.BmiHeader.Width;
m_videoHeight = videoInfoHeader.BmiHeader.Height;
m_stride = m_videoWidth * (videoInfoHeader.BmiHeader.BitCount / 8);
//m_bitmapDataArray = new byte[videoInfoHeader.BmiHeader.ImageSize];
m_handle = Marshal.AllocCoTaskMem(m_stride * m_videoHeight);
DsUtils.FreeAMMediaType(media);
media = null;
}
private void SaveSizeInfo(ISampleGrabber sampGrabber)
{
int hr;
// Get the media type from the SampleGrabber
AMMediaType media = new AMMediaType();
hr = sampGrabber.GetConnectedMediaType(media);
DsError.ThrowExceptionForHR(hr);
if ((media.formatType != FormatType.WaveEx) || (media.formatPtr == IntPtr.Zero)) {
throw new NotSupportedException("Unknown Grabber Audio Format");
}
WaveFormatEx infoHeader = (WaveFormatEx)Marshal.PtrToStructure(media.formatPtr, typeof(WaveFormatEx));
m_Channels = infoHeader.nChannels;
m_SampleRate = infoHeader.nSamplesPerSec;
m_BitsPerSample = infoHeader.wBitsPerSample;
DsUtils.FreeAMMediaType(media);
media = null;
}
public WaveFormatEx GetSampleGrabberFormat(ISampleGrabber sampleGrabber)
{
int hr;
AMMediaType mediaInfo = new AMMediaType();
hr = sampleGrabber.GetConnectedMediaType(mediaInfo);
DsError.ThrowExceptionForHR(hr);
if ((mediaInfo.formatType != FormatType.WaveEx) || (mediaInfo.formatPtr == IntPtr.Zero))
{
throw new NotSupportedException("Unknown Grabber Media Format");
}
WaveFormatEx format = new WaveFormatEx();
format = (WaveFormatEx)Marshal.PtrToStructure(mediaInfo.formatPtr, typeof(WaveFormatEx));
Marshal.FreeCoTaskMem(mediaInfo.formatPtr);
mediaInfo.formatPtr = IntPtr.Zero;
return format;
}
/// <summary>
/// Creates a new Video Player. Automatically creates the required Texture2D on the specificied GraphicsDevice.
/// </summary>
/// <param name="FileName">The video file to open</param>
/// <param name="graphicsDevice">XNA Graphics Device</param>
protected VideoPlayer(string FileName)
{
try
{
// Set video state
currentState = VideoState.Stopped;
// Store Filename
filename = FileName;
// Open DirectShow Interfaces
InitInterfaces();
// Create a SampleGrabber Filter and add it to the FilterGraph
//SampleGrabber sg = new SampleGrabber();
var comtype = Type.GetTypeFromCLSID(Clsid.SampleGrabber);
if (comtype == null)
{
throw new NotSupportedException("DirectX (8.1 or higher) not installed?");
}
m_comObject = Activator.CreateInstance(comtype);
ISampleGrabber sampleGrabber = (ISampleGrabber)m_comObject;
m_graphBuilder.AddFilter((IBaseFilter)m_comObject, "Grabber");
// Setup Media type info for the SampleGrabber
AMMediaType mt = new AMMediaType();
mt.majorType = MEDIATYPE_Video; // Video
mt.subType = MEDIASUBTYPE_RGB32; // RGB32
mt.formatType = FORMAT_VideoInfo; // VideoInfo
sampleGrabber.SetMediaType(mt);
// Construct the rest of the FilterGraph
m_graphBuilder.RenderFile(filename, null);
// Set SampleGrabber Properties
sampleGrabber.SetBufferSamples(true);
sampleGrabber.SetOneShot(false);
sampleGrabber.SetCallback((ISampleGrabberCB)this, 1);
// Hide Default Video Window
IVideoWindow pVideoWindow = (IVideoWindow)m_graphBuilder;
//pVideoWindow.put_AutoShow(OABool.False);
pVideoWindow.put_AutoShow(0);
// Create AMMediaType to capture video information
AMMediaType MediaType = new AMMediaType();
sampleGrabber.GetConnectedMediaType(MediaType);
VideoInfoHeader pVideoHeader = new VideoInfoHeader();
Marshal.PtrToStructure(MediaType.formatPtr, pVideoHeader);
// Store video information
videoHeight = pVideoHeader.BmiHeader.Height;
videoWidth = pVideoHeader.BmiHeader.Width;
avgTimePerFrame = pVideoHeader.AvgTimePerFrame;
bitRate = pVideoHeader.BitRate;
m_mediaSeeking.GetDuration(out videoDuration);
// Create byte arrays to hold video data
m_videoDataRgba = new MySwapQueue <byte[]>(() => new byte[(videoHeight * videoWidth) * 4]); // RGBA format (4 bytes per pixel)
}
catch (Exception e)
{
throw new Exception("Unable to Load or Play the video file", e);
}
}
protected void CompleteAudioSampleGrabberIntialization()
{
_actualAudioFormat = null;
if (sampleGrabber != null)
{
AMMediaType mtAudio = new AMMediaType();
if (HRESULT.SUCCEEDED(sampleGrabber.GetConnectedMediaType(mtAudio)))
{
_actualAudioFormat = (WaveFormatEx)Marshal.PtrToStructure(mtAudio.formatPtr, typeof(WaveFormatEx));
const int WAVEFORM_WNDSIZEFACTOR = 128;
const int VU_WNDSIZEFACTOR = 4096;
const int FFT_WNDSIZEFACTOR = 16;
int freq =
(MediaRenderer.DefaultInstance.ActualAudioFormat == null) ? 44100 :
MediaRenderer.DefaultInstance.ActualAudioFormat.nSamplesPerSec;
try
{
int k1 = 0, k2 = 0, k3 = 0;
while (freq / (1 << k1) > WAVEFORM_WNDSIZEFACTOR)
{
k1++;
}
while (freq / (1 << k2) > FFT_WNDSIZEFACTOR)
{
k2++;
}
while (freq / (1 << k3) > VU_WNDSIZEFACTOR)
{
k3++;
}
_waveformWindowSize = (1 << k1);
_fftWindowSize = (1 << k2);
_vuMeterWindowSize = (1 << k3);
_maxLevel =
(MediaRenderer.DefaultInstance.ActualAudioFormat != null) ?
(1 << (MediaRenderer.DefaultInstance.ActualAudioFormat.wBitsPerSample - 1)) - 1 :
short.MaxValue;
}
catch
{
_vuMeterWindowSize = 64;
_waveformWindowSize = 512;
_fftWindowSize = 4096;
_maxLevel = short.MaxValue;
}
finally
{
_maxLogLevel = Math.Log(_maxLevel);
}
sampleGrabberConfigured.Set();
return;
}
}
}
public bool AddVideoFilters(IGraphBuilder graphBuilder, ICaptureGraphBuilder2 captureGraphBuilder)
{
bool ret = SetDevice();
if (!ret)
{
return(false);
}
//サンプルグラバ(videoSampleGrabber)を作成
mVideoSampleGrabber = GraphFactory.MakeSampleGrabber();
//フィルタと関連付ける．
mVideoGrabFilter = (IBaseFilter)mVideoSampleGrabber;
//キャプチャするビデオデータのフォーマットを設定．
AMMediaType amMediaType = new AMMediaType();
amMediaType.majorType = MediaType.Video;
amMediaType.subType = MediaSubType.RGB24;
amMediaType.formatType = FormatType.VideoInfo;
int result;
result = mVideoSampleGrabber.SetMediaType(amMediaType);
if (result < 0)
{
Marshal.ThrowExceptionForHR(result);
}
// 映像のcaptureFilter(ソースフィルタ)をgraphBuilder（フィルタグラフマネージャ）に追加．
result = graphBuilder.AddFilter(mVideoCaptureFilter, "Video Capture Device");
if (result < 0)
{
Marshal.ThrowExceptionForHR(result);
}
//videoGrabFilter(変換フィルタ)をgraphBuilder（フィルタグラフマネージャ）に追加．
result = graphBuilder.AddFilter(mVideoGrabFilter, "Video Grab Filter");
//result = graphBuilder.AddFilter(videoGrabFilter, "Frame Grab Filter");
if (result < 0)
{
Marshal.ThrowExceptionForHR(result);
}
// 映像のキャプチャフィルタをサンプルグラバーフィルタに接続する．
result = captureGraphBuilder.RenderStream(PinCategory.Capture, MediaType.Video, mVideoCaptureFilter, null, mVideoGrabFilter);
if (result < 0)
{
Marshal.ThrowExceptionForHR(result);
}
// 映像のキャプチャフィルタをデフォルトのレンダラフィルタ（ディスプレイ上に出力）に接続する．（プレビュー）
result = captureGraphBuilder.RenderStream(PinCategory.Preview, MediaType.Video, mVideoCaptureFilter, null, null);
if (result < 0)
{
Marshal.ThrowExceptionForHR(result);
}
// フレームキャプチャの設定が完了したかを確認する．
amMediaType = new AMMediaType();
result = mVideoSampleGrabber.GetConnectedMediaType(amMediaType);
if (result < 0)
{
Marshal.ThrowExceptionForHR(result);
}
if ((amMediaType.formatType != FormatType.VideoInfo) || (amMediaType.formatPtr == IntPtr.Zero))
{
throw new NotSupportedException("エラー：キャプチャできない映像メディアフォーマットです．Error: This video media format cannnot be caputered.");
}
// キャプチャするビデオデータのフォーマットから，videoInfoHeaderを作成する．
mVideoInfoHeader = (VideoInfoHeader)Marshal.PtrToStructure(amMediaType.formatPtr, typeof(VideoInfoHeader));
Marshal.FreeCoTaskMem(amMediaType.formatPtr);
amMediaType.formatPtr = IntPtr.Zero;
// フィルタ内を通るサンプルをバッファにコピーしないように指定する．
result = mVideoSampleGrabber.SetBufferSamples(false);
// サンプルを一つ（1フレーム）受け取ったらフィルタを停止するように指定する．
if (result == 0)
{
result = mVideoSampleGrabber.SetOneShot(false);
}
// コールバック関数の利用を停止する．
if (result == 0)
{
result = mVideoSampleGrabber.SetCallback(null, 0);
}
if (result < 0)
{
Marshal.ThrowExceptionForHR(result);
}
return(true);
}
private static Bitmap GetBitmap(IGraphBuilder graph, ISampleGrabber sg, long grabPosition, out EventCode ec)
{
IntPtr pBuffer = IntPtr.Zero;
int pBufferSize = 0;
Bitmap b = null;
int hr = 0;
try
{
IMediaSeeking ims = graph as IMediaSeeking;
bool canDuration = false;
bool canPos = false;
bool canSeek = false;
long pDuration = 0;
long pCurrent = 0;
if (ims != null)
{
AMSeekingSeekingCapabilities caps;
hr = ims.GetCapabilities(out caps);
if ((caps & AMSeekingSeekingCapabilities.CanGetDuration) == AMSeekingSeekingCapabilities.CanGetDuration)
canDuration = true;
if ((caps & AMSeekingSeekingCapabilities.CanGetCurrentPos) == AMSeekingSeekingCapabilities.CanGetCurrentPos)
canPos = true;
if ((caps & AMSeekingSeekingCapabilities.CanSeekAbsolute) == AMSeekingSeekingCapabilities.CanSeekAbsolute)
canSeek = true;
if (canDuration)
hr = ims.GetDuration(out pDuration);
if (grabPosition > pDuration)
grabPosition = pDuration - 1;
if (canSeek)
{
hr = ims.SetPositions(new DsLong(grabPosition), AMSeekingSeekingFlags.AbsolutePositioning, 0, AMSeekingSeekingFlags.NoPositioning);
DsError.ThrowExceptionForHR(hr);
}
if (canPos)
hr = ims.GetCurrentPosition(out pCurrent);
}
if (canPos)
hr = ims.GetCurrentPosition(out pCurrent);
IMediaControl mControl = graph as IMediaControl;
IMediaEvent mEvent = graph as IMediaEvent;
//ec = EventCode.SystemBase;
hr = mControl.Pause();
DsError.ThrowExceptionForHR(hr);
hr = mControl.Run();
DsError.ThrowExceptionForHR(hr);
hr = mEvent.WaitForCompletion(int.MaxValue, out ec);
DsError.ThrowExceptionForHR(hr);
hr = mControl.Pause();
DsError.ThrowExceptionForHR(hr);
hr = mControl.Stop();
DsError.ThrowExceptionForHR(hr);
if (ec != EventCode.Complete)
return null;
hr = sg.GetCurrentBuffer(ref pBufferSize, pBuffer);
DsError.ThrowExceptionForHR(hr);
pBuffer = Marshal.AllocCoTaskMem(pBufferSize);
hr = sg.GetCurrentBuffer(ref pBufferSize, pBuffer);
DsError.ThrowExceptionForHR(hr);
if (pBuffer != IntPtr.Zero)
{
AMMediaType sgMt = new AMMediaType();
int videoWidth = 0;
int videoHeight = 0;
int stride = 0;
try
{
hr = sg.GetConnectedMediaType(sgMt);
DsError.ThrowExceptionForHR(hr);
if (sgMt.formatPtr != IntPtr.Zero)
{
if (sgMt.formatType == FormatType.VideoInfo)
{
VideoInfoHeader vih = (VideoInfoHeader)Marshal.PtrToStructure(sgMt.formatPtr, typeof(VideoInfoHeader));
videoWidth = vih.BmiHeader.Width;
videoHeight = vih.BmiHeader.Height;
stride = videoWidth * (vih.BmiHeader.BitCount / 8);
}
else
throw new ApplicationException("Unsupported Sample");
b = new Bitmap(videoWidth, videoHeight, stride, System.Drawing.Imaging.PixelFormat.Format32bppRgb, pBuffer);
b.RotateFlip(RotateFlipType.RotateNoneFlipY);
}
}
finally
{
DsUtils.FreeAMMediaType(sgMt);
}
}
return b;
}
finally
{
if (pBuffer != IntPtr.Zero)
Marshal.FreeCoTaskMem(pBuffer);
}
}
private void InitializeCapture()
{
graphBuilder = (IGraphBuilder)new FilterGraph();
mediaControl = (IMediaControl)graphBuilder;
captureGraphBuilder = (ICaptureGraphBuilder2)new CaptureGraphBuilder2();
hr = captureGraphBuilder.SetFiltergraph(graphBuilder);
DsError.ThrowExceptionForHR(hr);
IBaseFilter videoInput = GetVideoInputObject();
if (null != videoInput)
{
SetConfigurations(videoInput);
sampleGrabber = new SampleGrabber() as ISampleGrabber;
hr = graphBuilder.AddFilter((IBaseFilter)sampleGrabber, "Render");
DsError.ThrowExceptionForHR(hr);
hr = graphBuilder.AddFilter(videoInput, "Camera");
DsError.ThrowExceptionForHR(hr);
AMMediaType type = new AMMediaType() { majorType = MediaType.Video, subType = MediaSubType.ARGB32, formatType = FormatType.VideoInfo };
hr = sampleGrabber.SetMediaType(type);
DsError.ThrowExceptionForHR(hr);
DsUtils.FreeAMMediaType(type);
sampleGrabber.SetBufferSamples(false);
sampleGrabber.SetOneShot(false);
sampleGrabber.GetConnectedMediaType(new AMMediaType());
sampleGrabber.SetCallback((ISampleGrabberCB)this, 1);
hr = captureGraphBuilder.RenderStream(PinCategory.Preview, MediaType.Video, videoInput, null, sampleGrabber as IBaseFilter);
DsError.ThrowExceptionForHR(hr);
Marshal.ReleaseComObject(videoInput);
}
}
/// <summary>
/// Worker thread that captures the images
/// </summary>
private void Init()
{
try
{
log.Trace("Start worker thread");
// Create the main graph
_graph = Activator.CreateInstance(Type.GetTypeFromCLSID(FilterGraph)) as IGraphBuilder;
// Create the webcam source
_sourceObject = FilterInfo.CreateFilter(_monikerString);
// Create the grabber
_grabber = Activator.CreateInstance(Type.GetTypeFromCLSID(SampleGrabber)) as ISampleGrabber;
_grabberObject = _grabber as IBaseFilter;
// Add the source and grabber to the main graph
_graph.AddFilter(_sourceObject, "source");
_graph.AddFilter(_grabberObject, "grabber");
using (AMMediaType mediaType = new AMMediaType())
{
mediaType.MajorType = MediaTypes.Video;
mediaType.SubType = MediaSubTypes.RGB32;
_grabber.SetMediaType(mediaType);
if (_graph.Connect(_sourceObject.GetPin(PinDirection.Output, 0), _grabberObject.GetPin(PinDirection.Input, 0)) >= 0)
{
if (_grabber.GetConnectedMediaType(mediaType) == 0)
{
// During startup, this code can be too fast, so try at least 3 times
int retryCount = 0;
bool succeeded = false;
while ((retryCount < 3) && !succeeded)
{
// Tried again
retryCount++;
try
{
// Retrieve the grabber information
VideoInfoHeader header = (VideoInfoHeader)Marshal.PtrToStructure(mediaType.FormatPtr, typeof(VideoInfoHeader));
_capGrabber.Width = header.BmiHeader.Width;
_capGrabber.Height = header.BmiHeader.Height;
// Succeeded
succeeded = true;
}
catch
{
// Trace
log.InfoFormat("Failed to retrieve the grabber information, tried {0} time(s)", retryCount);
// Sleep
Thread.Sleep(50);
}
}
}
}
_graph.Render(_grabberObject.GetPin(PinDirection.Output, 0));
_grabber.SetBufferSamples(false);
_grabber.SetOneShot(false);
_grabber.SetCallback(_capGrabber, 1);
log.Trace("_grabber set up");
// Get the video window
IVideoWindow wnd = (IVideoWindow)_graph;
wnd.put_AutoShow(false);
wnd = null;
// Create the control and run
_control = (IMediaControl)_graph;
_control.Run();
log.Trace("control runs");
// Wait for the stop signal
//while (!_stopSignal.WaitOne(0, true))
//{
// Thread.Sleep(10);
//}
}
}catch (Exception ex)
{
// Trace
log.Debug(ex);
Release();
}
}
private void WorkerThread(bool runGraph)
{
ReasonToFinishPlaying reason = ReasonToFinishPlaying.StoppedByUser;
bool flag = false;
Grabber grabber = new Grabber(this, snapshotMode: false);
Grabber grabber2 = new Grabber(this, snapshotMode: true);
object obj = null;
object obj2 = null;
object obj3 = null;
object obj4 = null;
object retInterface = null;
ICaptureGraphBuilder2 captureGraphBuilder = null;
IFilterGraph2 filterGraph = null;
IBaseFilter baseFilter = null;
IBaseFilter baseFilter2 = null;
IBaseFilter baseFilter3 = null;
ISampleGrabber sampleGrabber = null;
ISampleGrabber sampleGrabber2 = null;
IMediaControl mediaControl = null;
IAMVideoControl iAMVideoControl = null;
IMediaEventEx mediaEventEx = null;
IPin pin = null;
IAMCrossbar iAMCrossbar = null;
try
{
Type typeFromCLSID = Type.GetTypeFromCLSID(Clsid.CaptureGraphBuilder2);
if (typeFromCLSID == null)
{
throw new ApplicationException("Failed creating capture graph builder");
}
obj = Activator.CreateInstance(typeFromCLSID);
captureGraphBuilder = (ICaptureGraphBuilder2)obj;
typeFromCLSID = Type.GetTypeFromCLSID(Clsid.FilterGraph);
if (typeFromCLSID == null)
{
throw new ApplicationException("Failed creating filter graph");
}
obj2 = Activator.CreateInstance(typeFromCLSID);
filterGraph = (IFilterGraph2)obj2;
captureGraphBuilder.SetFiltergraph((IGraphBuilder)filterGraph);
sourceObject = FilterInfo.CreateFilter(deviceMoniker);
if (sourceObject == null)
{
throw new ApplicationException("Failed creating device object for moniker");
}
baseFilter = (IBaseFilter)sourceObject;
try
{
iAMVideoControl = (IAMVideoControl)sourceObject;
}
catch
{
}
typeFromCLSID = Type.GetTypeFromCLSID(Clsid.SampleGrabber);
if (typeFromCLSID == null)
{
throw new ApplicationException("Failed creating sample grabber");
}
obj3 = Activator.CreateInstance(typeFromCLSID);
sampleGrabber = (ISampleGrabber)obj3;
baseFilter2 = (IBaseFilter)obj3;
obj4 = Activator.CreateInstance(typeFromCLSID);
sampleGrabber2 = (ISampleGrabber)obj4;
baseFilter3 = (IBaseFilter)obj4;
filterGraph.AddFilter(baseFilter, "source");
filterGraph.AddFilter(baseFilter2, "grabber_video");
filterGraph.AddFilter(baseFilter3, "grabber_snapshot");
AMMediaType aMMediaType = new AMMediaType();
aMMediaType.MajorType = MediaType.Video;
aMMediaType.SubType = MediaSubType.RGB24;
sampleGrabber.SetMediaType(aMMediaType);
sampleGrabber2.SetMediaType(aMMediaType);
captureGraphBuilder.FindInterface(FindDirection.UpstreamOnly, Guid.Empty, baseFilter, typeof(IAMCrossbar).GUID, out retInterface);
if (retInterface != null)
{
iAMCrossbar = (IAMCrossbar)retInterface;
}
isCrossbarAvailable = (iAMCrossbar != null);
crossbarVideoInputs = ColletCrossbarVideoInputs(iAMCrossbar);
if (iAMVideoControl != null)
{
captureGraphBuilder.FindPin(sourceObject, PinDirection.Output, PinCategory.StillImage, MediaType.Video, unconnected: false, 0, out pin);
if (pin != null)
{
iAMVideoControl.GetCaps(pin, out VideoControlFlags flags);
flag = ((flags & VideoControlFlags.ExternalTriggerEnable) != 0);
}
}
sampleGrabber.SetBufferSamples(bufferThem: false);
sampleGrabber.SetOneShot(oneShot: false);
sampleGrabber.SetCallback(grabber, 1);
sampleGrabber2.SetBufferSamples(bufferThem: true);
sampleGrabber2.SetOneShot(oneShot: false);
sampleGrabber2.SetCallback(grabber2, 1);
GetPinCapabilitiesAndConfigureSizeAndRate(captureGraphBuilder, baseFilter, PinCategory.Capture, videoResolution, ref videoCapabilities);
if (flag)
{
GetPinCapabilitiesAndConfigureSizeAndRate(captureGraphBuilder, baseFilter, PinCategory.StillImage, snapshotResolution, ref snapshotCapabilities);
}
else
{
snapshotCapabilities = new VideoCapabilities[0];
}
lock (cacheVideoCapabilities)
{
if (videoCapabilities != null && !cacheVideoCapabilities.ContainsKey(deviceMoniker))
{
cacheVideoCapabilities.Add(deviceMoniker, videoCapabilities);
}
}
lock (cacheSnapshotCapabilities)
{
if (snapshotCapabilities != null && !cacheSnapshotCapabilities.ContainsKey(deviceMoniker))
{
cacheSnapshotCapabilities.Add(deviceMoniker, snapshotCapabilities);
}
}
if (runGraph)
{
captureGraphBuilder.RenderStream(PinCategory.Capture, MediaType.Video, baseFilter, null, baseFilter2);
if (sampleGrabber.GetConnectedMediaType(aMMediaType) == 0)
{
VideoInfoHeader videoInfoHeader = (VideoInfoHeader)Marshal.PtrToStructure(aMMediaType.FormatPtr, typeof(VideoInfoHeader));
grabber.Width = videoInfoHeader.BmiHeader.Width;
grabber.Height = videoInfoHeader.BmiHeader.Height;
aMMediaType.Dispose();
}
if (flag && provideSnapshots)
{
captureGraphBuilder.RenderStream(PinCategory.StillImage, MediaType.Video, baseFilter, null, baseFilter3);
if (sampleGrabber2.GetConnectedMediaType(aMMediaType) == 0)
{
VideoInfoHeader videoInfoHeader2 = (VideoInfoHeader)Marshal.PtrToStructure(aMMediaType.FormatPtr, typeof(VideoInfoHeader));
grabber2.Width = videoInfoHeader2.BmiHeader.Width;
grabber2.Height = videoInfoHeader2.BmiHeader.Height;
aMMediaType.Dispose();
}
}
mediaControl = (IMediaControl)obj2;
mediaEventEx = (IMediaEventEx)obj2;
mediaControl.Run();
if (flag && provideSnapshots)
{
startTime = DateTime.Now;
iAMVideoControl.SetMode(pin, VideoControlFlags.ExternalTriggerEnable);
}
do
{
if (mediaEventEx != null && mediaEventEx.GetEvent(out DsEvCode lEventCode, out IntPtr lParam, out IntPtr lParam2, 0) >= 0)
{
mediaEventEx.FreeEventParams(lEventCode, lParam, lParam2);
if (lEventCode == DsEvCode.DeviceLost)
{
reason = ReasonToFinishPlaying.DeviceLost;
break;
}
}
if (needToSetVideoInput)
{
needToSetVideoInput = false;
if (isCrossbarAvailable.Value)
{
SetCurrentCrossbarInput(iAMCrossbar, crossbarVideoInput);
crossbarVideoInput = GetCurrentCrossbarInput(iAMCrossbar);
}
}
if (needToSimulateTrigger)
{
needToSimulateTrigger = false;
if (flag && provideSnapshots)
{
iAMVideoControl.SetMode(pin, VideoControlFlags.Trigger);
}
}
if (needToDisplayPropertyPage)
{
needToDisplayPropertyPage = false;
DisplayPropertyPage(parentWindowForPropertyPage, sourceObject);
if (iAMCrossbar != null)
{
crossbarVideoInput = GetCurrentCrossbarInput(iAMCrossbar);
}
}
if (needToDisplayCrossBarPropertyPage)
{
needToDisplayCrossBarPropertyPage = false;
if (iAMCrossbar != null)
{
DisplayPropertyPage(parentWindowForPropertyPage, iAMCrossbar);
crossbarVideoInput = GetCurrentCrossbarInput(iAMCrossbar);
}
}
}while (!stopEvent.WaitOne(100, exitContext: false));
mediaControl.Stop();
}
}
catch (Exception ex)
{
if (this.VideoSourceError != null)
{
this.VideoSourceError(this, new VideoSourceErrorEventArgs(ex.Message));
}
}
finally
{
captureGraphBuilder = null;
filterGraph = null;
baseFilter = null;
mediaControl = null;
iAMVideoControl = null;
mediaEventEx = null;
pin = null;
iAMCrossbar = null;
baseFilter2 = null;
baseFilter3 = null;
sampleGrabber = null;
sampleGrabber2 = null;
if (obj2 != null)
{
Marshal.ReleaseComObject(obj2);
obj2 = null;
}
if (sourceObject != null)
{
Marshal.ReleaseComObject(sourceObject);
sourceObject = null;
}
if (obj3 != null)
{
Marshal.ReleaseComObject(obj3);
obj3 = null;
}
if (obj4 != null)
{
Marshal.ReleaseComObject(obj4);
obj4 = null;
}
if (obj != null)
{
Marshal.ReleaseComObject(obj);
obj = null;
}
if (retInterface != null)
{
Marshal.ReleaseComObject(retInterface);
retInterface = null;
}
}
if (this.PlayingFinished != null)
{
this.PlayingFinished(this, reason);
}
}
private static Bitmap GetBitmap(IGraphBuilder graph, ISampleGrabber sg, long grabPosition, out EventCode ec)
{
IntPtr pBuffer = IntPtr.Zero;
int pBufferSize = 0;
Bitmap b = null;
int hr = 0;
try
{
IMediaSeeking ims = graph as IMediaSeeking;
bool canDuration = false;
bool canPos = false;
bool canSeek = false;
long pDuration = 0;
long pCurrent = 0;
if (ims != null)
{
AMSeekingSeekingCapabilities caps;
hr = ims.GetCapabilities(out caps);
if ((caps & AMSeekingSeekingCapabilities.CanGetDuration) == AMSeekingSeekingCapabilities.CanGetDuration)
{
canDuration = true;
}
if ((caps & AMSeekingSeekingCapabilities.CanGetCurrentPos) == AMSeekingSeekingCapabilities.CanGetCurrentPos)
{
canPos = true;
}
if ((caps & AMSeekingSeekingCapabilities.CanSeekAbsolute) == AMSeekingSeekingCapabilities.CanSeekAbsolute)
{
canSeek = true;
}
if (canDuration)
{
hr = ims.GetDuration(out pDuration);
}
if (grabPosition > pDuration)
{
grabPosition = pDuration - 1;
}
if (canSeek)
{
hr = ims.SetPositions(new DsLong(grabPosition), AMSeekingSeekingFlags.AbsolutePositioning, 0, AMSeekingSeekingFlags.NoPositioning);
DsError.ThrowExceptionForHR(hr);
}
if (canPos)
{
hr = ims.GetCurrentPosition(out pCurrent);
}
}
if (canPos)
{
hr = ims.GetCurrentPosition(out pCurrent);
}
IMediaControl mControl = graph as IMediaControl;
IMediaEvent mEvent = graph as IMediaEvent;
//ec = EventCode.SystemBase;
hr = mControl.Pause();
DsError.ThrowExceptionForHR(hr);
hr = mControl.Run();
DsError.ThrowExceptionForHR(hr);
hr = mEvent.WaitForCompletion(int.MaxValue, out ec);
DsError.ThrowExceptionForHR(hr);
hr = mControl.Pause();
DsError.ThrowExceptionForHR(hr);
hr = mControl.Stop();
DsError.ThrowExceptionForHR(hr);
if (ec != EventCode.Complete)
{
return(null);
}
hr = sg.GetCurrentBuffer(ref pBufferSize, pBuffer);
DsError.ThrowExceptionForHR(hr);
pBuffer = Marshal.AllocCoTaskMem(pBufferSize);
hr = sg.GetCurrentBuffer(ref pBufferSize, pBuffer);
DsError.ThrowExceptionForHR(hr);
if (pBuffer != IntPtr.Zero)
{
AMMediaType sgMt = new AMMediaType();
int videoWidth = 0;
int videoHeight = 0;
int stride = 0;
try
{
hr = sg.GetConnectedMediaType(sgMt);
DsError.ThrowExceptionForHR(hr);
if (sgMt.formatPtr != IntPtr.Zero)
{
if (sgMt.formatType == FormatType.VideoInfo)
{
VideoInfoHeader vih = (VideoInfoHeader)Marshal.PtrToStructure(sgMt.formatPtr, typeof(VideoInfoHeader));
videoWidth = vih.BmiHeader.Width;
videoHeight = vih.BmiHeader.Height;
stride = videoWidth * (vih.BmiHeader.BitCount / 8);
}
else
{
throw new ApplicationException("Unsupported Sample");
}
b = new Bitmap(videoWidth, videoHeight, stride, System.Drawing.Imaging.PixelFormat.Format32bppRgb, pBuffer);
b.RotateFlip(RotateFlipType.RotateNoneFlipY);
}
}
finally
{
DsUtils.FreeAMMediaType(sgMt);
}
}
return(b);
}
finally
{
if (pBuffer != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(pBuffer);
}
}
}
// Thread entry point
public void WorkerThread()
{
bool failed = false;
// grabber
Grabber grabber = new Grabber(this);
// objects
object graphObj = null;
object sourceObj = null;
object grabberObj = null;
// interfaces
IGraphBuilder graph = null;
IBaseFilter sourceBase = null;
IBaseFilter grabberBase = null;
ISampleGrabber sg = null;
IFileSourceFilter fileSource = null;
IMediaControl mc = null;
IMediaEventEx mediaEvent = null;
int code, param1, param2;
while ((!failed) && (!stopEvent.WaitOne(0, true)))
{
try
{
// Get type for filter graph
Type srvType = Type.GetTypeFromCLSID(Clsid.FilterGraph);
if (srvType == null)
{
throw new ApplicationException("Failed creating filter graph");
}
// create filter graph
graphObj = Activator.CreateInstance(srvType);
graph = (IGraphBuilder)graphObj;
// Get type for windows media source filter
srvType = Type.GetTypeFromCLSID(Clsid.WindowsMediaSource);
if (srvType == null)
{
throw new ApplicationException("Failed creating WM source");
}
// create windows media source filter
sourceObj = Activator.CreateInstance(srvType);
sourceBase = (IBaseFilter)sourceObj;
// Get type for sample grabber
srvType = Type.GetTypeFromCLSID(Clsid.SampleGrabber);
if (srvType == null)
{
throw new ApplicationException("Failed creating sample grabber");
}
// create sample grabber
grabberObj = Activator.CreateInstance(srvType);
sg = (ISampleGrabber)grabberObj;
grabberBase = (IBaseFilter)grabberObj;
// add source filter to graph
graph.AddFilter(sourceBase, "source");
graph.AddFilter(grabberBase, "grabber");
// set media type
AMMediaType mt = new AMMediaType();
mt.majorType = MediaType.Video;
mt.subType = MediaSubType.RGB24;
sg.SetMediaType(mt);
// load file
fileSource = (IFileSourceFilter)sourceObj;
fileSource.Load(this.source, null);
// connect pins
if (graph.Connect(DSTools.GetOutPin(sourceBase, 0), DSTools.GetInPin(grabberBase, 0)) < 0)
{
throw new ApplicationException("Failed connecting filters");
}
// get media type
if (sg.GetConnectedMediaType(mt) == 0)
{
VideoInfoHeader vih = (VideoInfoHeader)Marshal.PtrToStructure(mt.formatPtr, typeof(VideoInfoHeader));
grabber.Width = vih.BmiHeader.Width;
grabber.Height = vih.BmiHeader.Height;
mt.Dispose();
}
// render
graph.Render(DSTools.GetOutPin(grabberBase, 0));
//
sg.SetBufferSamples(false);
sg.SetOneShot(false);
sg.SetCallback(grabber, 1);
// window
IVideoWindow win = (IVideoWindow)graphObj;
win.put_AutoShow(false);
win = null;
// get events interface
mediaEvent = (IMediaEventEx)graphObj;
// get media control
mc = (IMediaControl)graphObj;
// run
mc.Run();
while (!stopEvent.WaitOne(0, true))
{
Thread.Sleep(100);
// get an event
if (mediaEvent.GetEvent(out code, out param1, out param2, 0) == 0)
{
// release params
mediaEvent.FreeEventParams(code, param1, param2);
//
if (code == (int)EventCode.Complete)
{
break;
}
}
}
mc.StopWhenReady();
}
// catch any exceptions
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine("----: " + e.Message);
failed = true;
}
// finalization block
finally
{
// release all objects
mediaEvent = null;
mc = null;
fileSource = null;
graph = null;
sourceBase = null;
grabberBase = null;
sg = null;
if (graphObj != null)
{
Marshal.ReleaseComObject(graphObj);
graphObj = null;
}
if (sourceObj != null)
{
Marshal.ReleaseComObject(sourceObj);
sourceObj = null;
}
if (grabberObj != null)
{
Marshal.ReleaseComObject(grabberObj);
grabberObj = null;
}
}
}
}
private void WorkerThread()
{
ReasonToFinishPlaying reason = ReasonToFinishPlaying.StoppedByUser;
Grabber grabber = new Grabber(this);
object obj = null;
object obj2 = null;
IGraphBuilder graphBuilder = null;
IBaseFilter filter = null;
IBaseFilter baseFilter = null;
ISampleGrabber sampleGrabber = null;
IMediaControl mediaControl = null;
IMediaEventEx mediaEventEx = null;
try
{
Type typeFromCLSID = Type.GetTypeFromCLSID(Clsid.FilterGraph);
if (typeFromCLSID == null)
{
throw new ApplicationException("Failed creating filter graph");
}
obj = Activator.CreateInstance(typeFromCLSID);
graphBuilder = (IGraphBuilder)obj;
graphBuilder.AddSourceFilter(fileName, "source", out filter);
if (filter == null)
{
throw new ApplicationException("Failed creating source filter");
}
typeFromCLSID = Type.GetTypeFromCLSID(Clsid.SampleGrabber);
if (typeFromCLSID == null)
{
throw new ApplicationException("Failed creating sample grabber");
}
obj2 = Activator.CreateInstance(typeFromCLSID);
sampleGrabber = (ISampleGrabber)obj2;
baseFilter = (IBaseFilter)obj2;
graphBuilder.AddFilter(baseFilter, "grabber");
AMMediaType aMMediaType = new AMMediaType();
aMMediaType.MajorType = MediaType.Video;
aMMediaType.SubType = MediaSubType.RGB24;
sampleGrabber.SetMediaType(aMMediaType);
int num = 0;
IPin inPin = Tools.GetInPin(baseFilter, 0);
IPin pin = null;
while (true)
{
pin = Tools.GetOutPin(filter, num);
if (pin == null)
{
Marshal.ReleaseComObject(inPin);
throw new ApplicationException("Did not find acceptable output video pin in the given source");
}
if (graphBuilder.Connect(pin, inPin) >= 0)
{
break;
}
Marshal.ReleaseComObject(pin);
pin = null;
num++;
}
Marshal.ReleaseComObject(pin);
Marshal.ReleaseComObject(inPin);
if (sampleGrabber.GetConnectedMediaType(aMMediaType) == 0)
{
VideoInfoHeader videoInfoHeader = (VideoInfoHeader)Marshal.PtrToStructure(aMMediaType.FormatPtr, typeof(VideoInfoHeader));
grabber.Width = videoInfoHeader.BmiHeader.Width;
grabber.Height = videoInfoHeader.BmiHeader.Height;
aMMediaType.Dispose();
}
if (!preventFreezing)
{
graphBuilder.Render(Tools.GetOutPin(baseFilter, 0));
IVideoWindow videoWindow = (IVideoWindow)obj;
videoWindow.put_AutoShow(autoShow: false);
videoWindow = null;
}
sampleGrabber.SetBufferSamples(bufferThem: false);
sampleGrabber.SetOneShot(oneShot: false);
sampleGrabber.SetCallback(grabber, 1);
if (!referenceClockEnabled)
{
IMediaFilter mediaFilter = (IMediaFilter)obj;
mediaFilter.SetSyncSource(null);
}
mediaControl = (IMediaControl)obj;
mediaEventEx = (IMediaEventEx)obj;
mediaControl.Run();
do
{
if (mediaEventEx != null && mediaEventEx.GetEvent(out DsEvCode lEventCode, out IntPtr lParam, out IntPtr lParam2, 0) >= 0)
{
mediaEventEx.FreeEventParams(lEventCode, lParam, lParam2);
if (lEventCode == DsEvCode.Complete)
{
reason = ReasonToFinishPlaying.EndOfStreamReached;
break;
}
}
}while (!stopEvent.WaitOne(100, exitContext: false));
mediaControl.Stop();
}
catch (Exception ex)
{
if (this.VideoSourceError != null)
{
this.VideoSourceError(this, new VideoSourceErrorEventArgs(ex.Message));
}
}
finally
{
graphBuilder = null;
baseFilter = null;
sampleGrabber = null;
mediaControl = null;
mediaEventEx = null;
if (obj != null)
{
Marshal.ReleaseComObject(obj);
obj = null;
}
if (filter != null)
{
Marshal.ReleaseComObject(filter);
filter = null;
}
if (obj2 != null)
{
Marshal.ReleaseComObject(obj2);
obj2 = null;
}
}
if (this.PlayingFinished != null)
{
this.PlayingFinished(this, reason);
}
}
private void WorkerThread(bool runGraph)
{
ReasonToFinishPlaying reasonToStop = ReasonToFinishPlaying.StoppedByUser;
bool isSapshotSupported = false;
Grabber videoGrabber = new Grabber(this, false);
Grabber snapshotGrabber = new Grabber(this, true);
object captureGraphObject = null;
object graphObject = null;
object videoGrabberObject = null;
object snapshotGrabberObject = null;
object crossbarObject = null;
ICaptureGraphBuilder2 captureGraph = null;
IFilterGraph2 graph = null;
IBaseFilter sourceBase = null;
IBaseFilter videoGrabberBase = null;
IBaseFilter snapshotGrabberBase = null;
ISampleGrabber videoSampleGrabber = null;
ISampleGrabber snapshotSampleGrabber = null;
IMediaControl mediaControl = null;
IAMVideoControl videoControl = null;
IMediaEventEx mediaEvent = null;
IPin pinStillImage = null;
IAMCrossbar crossbar = null;
try
{
Type type = Type.GetTypeFromCLSID(Clsid.CaptureGraphBuilder2);
if (type == null)
{
throw new ApplicationException("Failed creating capture graph builder");
}
captureGraphObject = Activator.CreateInstance(type);
captureGraph = (ICaptureGraphBuilder2)captureGraphObject;
type = Type.GetTypeFromCLSID(Clsid.FilterGraph);
if (type == null)
{
throw new ApplicationException("Failed creating filter graph");
}
graphObject = Activator.CreateInstance(type);
graph = (IFilterGraph2)graphObject;
captureGraph.SetFiltergraph((IGraphBuilder)graph);
sourceObject = FilterInfo.CreateFilter(deviceMoniker);
if (sourceObject == null)
{
throw new ApplicationException("Failed creating device object for moniker");
}
sourceBase = (IBaseFilter)sourceObject;
try
{
videoControl = (IAMVideoControl)sourceObject;
}
catch
{
}
type = Type.GetTypeFromCLSID(Clsid.SampleGrabber);
if (type == null)
{
throw new ApplicationException("Failed creating sample grabber");
}
videoGrabberObject = Activator.CreateInstance(type);
videoSampleGrabber = (ISampleGrabber)videoGrabberObject;
videoGrabberBase = (IBaseFilter)videoGrabberObject;
snapshotGrabberObject = Activator.CreateInstance(type);
snapshotSampleGrabber = (ISampleGrabber)snapshotGrabberObject;
snapshotGrabberBase = (IBaseFilter)snapshotGrabberObject;
graph.AddFilter(sourceBase, "source");
graph.AddFilter(videoGrabberBase, "grabber_video");
graph.AddFilter(snapshotGrabberBase, "grabber_snapshot");
AMMediaType mediaType = new AMMediaType( );
mediaType.MajorType = MediaType.Video;
mediaType.SubType = MediaSubType.RGB24;
videoSampleGrabber.SetMediaType(mediaType);
snapshotSampleGrabber.SetMediaType(mediaType);
captureGraph.FindInterface(FindDirection.UpstreamOnly, Guid.Empty, sourceBase, typeof(IAMCrossbar).GUID, out crossbarObject);
if (crossbarObject != null)
{
crossbar = (IAMCrossbar)crossbarObject;
}
isCrossbarAvailable = (crossbar != null);
crossbarVideoInputs = ColletCrossbarVideoInputs(crossbar);
if (videoControl != null)
{
captureGraph.FindPin(sourceObject, PinDirection.Output,
PinCategory.StillImage, MediaType.Video, false, 0, out pinStillImage);
if (pinStillImage != null)
{
VideoControlFlags caps;
videoControl.GetCaps(pinStillImage, out caps);
isSapshotSupported = ((caps & VideoControlFlags.ExternalTriggerEnable) != 0);
}
}
videoSampleGrabber.SetBufferSamples(false);
videoSampleGrabber.SetOneShot(false);
videoSampleGrabber.SetCallback(videoGrabber, 1);
snapshotSampleGrabber.SetBufferSamples(true);
snapshotSampleGrabber.SetOneShot(false);
snapshotSampleGrabber.SetCallback(snapshotGrabber, 1);
GetPinCapabilitiesAndConfigureSizeAndRate(captureGraph, sourceBase,
PinCategory.Capture, videoResolution, ref videoCapabilities);
if (isSapshotSupported)
{
GetPinCapabilitiesAndConfigureSizeAndRate(captureGraph, sourceBase,
PinCategory.StillImage, snapshotResolution, ref snapshotCapabilities);
}
else
{
snapshotCapabilities = new VideoCapabilities[0];
}
lock ( cacheVideoCapabilities )
{
if ((videoCapabilities != null) && (!cacheVideoCapabilities.ContainsKey(deviceMoniker)))
{
cacheVideoCapabilities.Add(deviceMoniker, videoCapabilities);
}
}
lock ( cacheSnapshotCapabilities )
{
if ((snapshotCapabilities != null) && (!cacheSnapshotCapabilities.ContainsKey(deviceMoniker)))
{
cacheSnapshotCapabilities.Add(deviceMoniker, snapshotCapabilities);
}
}
if (runGraph)
{
captureGraph.RenderStream(PinCategory.Capture, MediaType.Video, sourceBase, null, videoGrabberBase);
if (videoSampleGrabber.GetConnectedMediaType(mediaType) == 0)
{
VideoInfoHeader vih = (VideoInfoHeader)Marshal.PtrToStructure(mediaType.FormatPtr, typeof(VideoInfoHeader));
videoGrabber.Width = vih.BmiHeader.Width;
videoGrabber.Height = vih.BmiHeader.Height;
mediaType.Dispose( );
}
if ((isSapshotSupported) && (provideSnapshots))
{
captureGraph.RenderStream(PinCategory.StillImage, MediaType.Video, sourceBase, null, snapshotGrabberBase);
if (snapshotSampleGrabber.GetConnectedMediaType(mediaType) == 0)
{
VideoInfoHeader vih = (VideoInfoHeader)Marshal.PtrToStructure(mediaType.FormatPtr, typeof(VideoInfoHeader));
snapshotGrabber.Width = vih.BmiHeader.Width;
snapshotGrabber.Height = vih.BmiHeader.Height;
mediaType.Dispose( );
}
}
mediaControl = (IMediaControl)graphObject;
mediaEvent = (IMediaEventEx)graphObject;
IntPtr p1, p2;
DsEvCode code;
mediaControl.Run( );
if ((isSapshotSupported) && (provideSnapshots))
{
startTime = DateTime.Now;
videoControl.SetMode(pinStillImage, VideoControlFlags.ExternalTriggerEnable);
}
do
{
if (mediaEvent != null)
{
if (mediaEvent.GetEvent(out code, out p1, out p2, 0) >= 0)
{
mediaEvent.FreeEventParams(code, p1, p2);
if (code == DsEvCode.DeviceLost)
{
reasonToStop = ReasonToFinishPlaying.DeviceLost;
break;
}
}
}
if (needToSetVideoInput)
{
needToSetVideoInput = false;
if (isCrossbarAvailable.Value)
{
SetCurrentCrossbarInput(crossbar, crossbarVideoInput);
crossbarVideoInput = GetCurrentCrossbarInput(crossbar);
}
}
if (needToSimulateTrigger)
{
needToSimulateTrigger = false;
if ((isSapshotSupported) && (provideSnapshots))
{
videoControl.SetMode(pinStillImage, VideoControlFlags.Trigger);
}
}
if (needToDisplayPropertyPage)
{
needToDisplayPropertyPage = false;
DisplayPropertyPage(parentWindowForPropertyPage, sourceObject);
if (crossbar != null)
{
crossbarVideoInput = GetCurrentCrossbarInput(crossbar);
}
}
if (needToDisplayCrossBarPropertyPage)
{
needToDisplayCrossBarPropertyPage = false;
if (crossbar != null)
{
DisplayPropertyPage(parentWindowForPropertyPage, crossbar);
crossbarVideoInput = GetCurrentCrossbarInput(crossbar);
}
}
}while (!stopEvent.WaitOne(100, false));
mediaControl.Stop( );
}
}
catch (Exception exception)
{
if (VideoSourceError != null)
{
VideoSourceError(this, new VideoSourceErrorEventArgs(exception.Message));
}
}
finally
{
captureGraph = null;
graph = null;
sourceBase = null;
mediaControl = null;
videoControl = null;
mediaEvent = null;
pinStillImage = null;
crossbar = null;
videoGrabberBase = null;
snapshotGrabberBase = null;
videoSampleGrabber = null;
snapshotSampleGrabber = null;
if (graphObject != null)
{
Marshal.ReleaseComObject(graphObject);
graphObject = null;
}
if (sourceObject != null)
{
Marshal.ReleaseComObject(sourceObject);
sourceObject = null;
}
if (videoGrabberObject != null)
{
Marshal.ReleaseComObject(videoGrabberObject);
videoGrabberObject = null;
}
if (snapshotGrabberObject != null)
{
Marshal.ReleaseComObject(snapshotGrabberObject);
snapshotGrabberObject = null;
}
if (captureGraphObject != null)
{
Marshal.ReleaseComObject(captureGraphObject);
captureGraphObject = null;
}
if (crossbarObject != null)
{
Marshal.ReleaseComObject(crossbarObject);
crossbarObject = null;
}
}
if (PlayingFinished != null)
{
PlayingFinished(this, reasonToStop);
}
}
void RunWorker()
{
try
{
graph = Activator.CreateInstance(Type.GetTypeFromCLSID(FilterGraph)) as IGraphBuilder;
sourceObject = FilterInfo.CreateFilter(deviceMoniker);
grabber = Activator.CreateInstance(Type.GetTypeFromCLSID(SampleGrabber)) as ISampleGrabber;
grabberObject = grabber as IBaseFilter;
graph.AddFilter(sourceObject, "source");
graph.AddFilter(grabberObject, "grabber");
using (AMMediaType mediaType = new AMMediaType())
{
mediaType.MajorType = MediaTypes.Video;
mediaType.SubType = MediaSubTypes.RGB32;
grabber.SetMediaType(mediaType);
if (graph.Connect(sourceObject.GetPin(PinDirection.Output, 0), grabberObject.GetPin(PinDirection.Input, 0)) >= 0)
{
if (grabber.GetConnectedMediaType(mediaType) == 0)
{
VideoInfoHeader header = (VideoInfoHeader)Marshal.PtrToStructure(mediaType.FormatPtr, typeof(VideoInfoHeader));
capGrabber.Width = header.BmiHeader.Width;
capGrabber.Height = header.BmiHeader.Height;
}
}
graph.Render(grabberObject.GetPin(PinDirection.Output, 0));
grabber.SetBufferSamples(false);
grabber.SetOneShot(false);
grabber.SetCallback(capGrabber, 1);
IVideoWindow wnd = (IVideoWindow)graph;
wnd.put_AutoShow(false);
wnd = null;
control = (IMediaControl)graph;
control.Run();
while (!stopSignal.WaitOne(0, true))
{
Thread.Sleep(10);
}
control.StopWhenReady();
}
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(ex);
}
finally
{
graph = null;
sourceObject = null;
grabberObject = null;
grabber = null;
capGrabber = null;
control = null;
}
}
private void SaveSizeInfo(ISampleGrabber sampGrabber)
{
AMMediaType media = new AMMediaType();
int hr = sampGrabber.GetConnectedMediaType(media);
DsError.ThrowExceptionForHR(hr);
if ((media.formatType != FormatType.VideoInfo) || (media.formatPtr == IntPtr.Zero))
{
throw new NotSupportedException("Unknown Grabber Media Format");
}
VideoInfoHeader videoInfoHeader = (VideoInfoHeader)Marshal.PtrToStructure(media.formatPtr, typeof(VideoInfoHeader));
videoWidth = videoInfoHeader.BmiHeader.Width;
videoHeight = videoInfoHeader.BmiHeader.Height;
stride = videoWidth * (videoInfoHeader.BmiHeader.BitCount / 8);
DsUtils.FreeAMMediaType(media);
}
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));
}
}
public void WorkerThread()
{
bool flag = false;
Grabber pCallback = new Grabber(this);
object o = null;
object obj3 = null;
object obj4 = null;
IGraphBuilder builder = null;
IBaseFilter pFilter = null;
IBaseFilter filter2 = null;
ISampleGrabber grabber2 = null;
IFileSourceFilter filter3 = null;
IMediaControl control = null;
IMediaEventEx ex = null;
while (!flag && !this.stopEvent.WaitOne(0, true))
{
try
{
try
{
Type typeFromCLSID = Type.GetTypeFromCLSID(Clsid.FilterGraph);
if (typeFromCLSID == null)
{
throw new ApplicationException("Failed creating filter graph");
}
o = Activator.CreateInstance(typeFromCLSID);
builder = (IGraphBuilder)o;
typeFromCLSID = Type.GetTypeFromCLSID(Clsid.WindowsMediaSource);
if (typeFromCLSID == null)
{
throw new ApplicationException("Failed creating WM source");
}
obj3 = Activator.CreateInstance(typeFromCLSID);
pFilter = (IBaseFilter)obj3;
typeFromCLSID = Type.GetTypeFromCLSID(Clsid.SampleGrabber);
if (typeFromCLSID == null)
{
throw new ApplicationException("Failed creating sample grabber");
}
obj4 = Activator.CreateInstance(typeFromCLSID);
grabber2 = (ISampleGrabber)obj4;
filter2 = (IBaseFilter)obj4;
builder.AddFilter(pFilter, "source");
builder.AddFilter(filter2, "grabber");
AMMediaType pmt = new AMMediaType {
majorType = MediaType.Video,
subType = MediaSubType.RGB24
};
grabber2.SetMediaType(pmt);
filter3 = (IFileSourceFilter)obj3;
filter3.Load(this.source, null);
if (builder.Connect(DSTools.GetOutPin(pFilter, 0), DSTools.GetInPin(filter2, 0)) < 0)
{
throw new ApplicationException("Failed connecting filters");
}
if (grabber2.GetConnectedMediaType(pmt) == 0)
{
VideoInfoHeader header = (VideoInfoHeader)Marshal.PtrToStructure(pmt.formatPtr, typeof(VideoInfoHeader));
pCallback.Width = header.BmiHeader.Width;
pCallback.Height = header.BmiHeader.Height;
pmt.Dispose();
}
builder.Render(DSTools.GetOutPin(filter2, 0));
grabber2.SetBufferSamples(false);
grabber2.SetOneShot(false);
grabber2.SetCallback(pCallback, 1);
IVideoWindow window = (IVideoWindow)o;
window.put_AutoShow(false);
window = null;
ex = (IMediaEventEx)o;
control = (IMediaControl)o;
control.Run();
while (!this.stopEvent.WaitOne(0, true))
{
int num;
int num2;
int num3;
Thread.Sleep(100);
if (ex.GetEvent(out num, out num2, out num3, 0) == 0)
{
ex.FreeEventParams(num, num2, num3);
if (num == 1)
{
break;
}
}
}
control.StopWhenReady();
}
catch (Exception)
{
flag = true;
}
continue;
}
finally
{
ex = null;
control = null;
filter3 = null;
builder = null;
pFilter = null;
filter2 = null;
grabber2 = null;
if (o != null)
{
Marshal.ReleaseComObject(o);
o = null;
}
if (obj3 != null)
{
Marshal.ReleaseComObject(obj3);
obj3 = null;
}
if (obj4 != null)
{
Marshal.ReleaseComObject(obj4);
obj4 = null;
}
}
}
}
void RunWorker()
{
try
{
graph = Activator.CreateInstance(Type.GetTypeFromCLSID(FilterGraph)) as IGraphBuilder;
sourceObject = FilterInfo.CreateFilter(deviceMoniker);
grabber = Activator.CreateInstance(Type.GetTypeFromCLSID(SampleGrabber)) as ISampleGrabber;
grabberObject = grabber as IBaseFilter;
graph.AddFilter(sourceObject, "source");
graph.AddFilter(grabberObject, "grabber");
using (AMMediaType mediaType = new AMMediaType())
{
mediaType.MajorType = MediaTypes.Video;
mediaType.SubType = MediaSubTypes.RGB32;
grabber.SetMediaType(mediaType);
if (graph.Connect(sourceObject.GetPin(PinDirection.Output, 0), grabberObject.GetPin(PinDirection.Input, 0)) >= 0)
{
if (grabber.GetConnectedMediaType(mediaType) == 0)
{
VideoInfoHeader header = (VideoInfoHeader)Marshal.PtrToStructure(mediaType.FormatPtr, typeof(VideoInfoHeader));
capGrabber.Width = header.BmiHeader.Width;
capGrabber.Height = header.BmiHeader.Height;
}
}
graph.Render(grabberObject.GetPin(PinDirection.Output, 0));
grabber.SetBufferSamples(false);
grabber.SetOneShot(false);
grabber.SetCallback(capGrabber, 1);
IVideoWindow wnd = (IVideoWindow)graph;
wnd.put_AutoShow(false);
wnd = null;
control = (IMediaControl)graph;
control.Run();
while (!stopSignal.WaitOne(0, true))
{
Thread.Sleep(10);
}
control.StopWhenReady();
}
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(ex);
}
finally
{
graph = null;
sourceObject = null;
grabberObject = null;
grabber = null;
capGrabber = null;
control = null;
}
}
/// <summary>;
/// Starts grabbing images from the capture device
/// </summary>
public virtual void Start()
{
if (_captureTask != null)
{
Stop();
}
_captureTask = new Task(() =>
{
// Create new grabber
_capGrabber = new CapGrabber();
_capGrabber.PropertyChanged += capGrabber_PropertyChanged;
_capGrabber.NewFrameArrived += capGrabber_NewFrameArrived;
_stopSignal = new ManualResetEvent(false);
_graph = Activator.CreateInstance(Type.GetTypeFromCLSID(FilterGraph)) as IFilterGraph2;
_sourceObject = FilterInfo.CreateFilter(_monikerString);
var outputPin = _sourceObject.GetPin(PinCategory.Capture, 0);
SelectWebcamResolution(outputPin);
_grabber = Activator.CreateInstance(Type.GetTypeFromCLSID(SampleGrabber)) as ISampleGrabber;
_grabberObject = _grabber as IBaseFilter;
if (_graph == null)
{
return;
}
;
_graph.AddFilter(_sourceObject, "source");
_graph.AddFilter(_grabberObject, "grabber");
using (var mediaType = new AMMediaType())
{
mediaType.MajorType = MediaTypes.Video;
mediaType.SubType = MediaSubTypes.RGB32;
if (_grabber != null)
{
_grabber.SetMediaType(mediaType);
var inputPin = _grabberObject.GetPin(PinDirection.Input, 0);
if (_graph.Connect(outputPin, inputPin) >= 0)
{
if (_grabber.GetConnectedMediaType(mediaType) == 0)
{
var header = (VideoInfoHeader)Marshal.PtrToStructure(mediaType.FormatPtr, typeof(VideoInfoHeader));
_capGrabber.Width = header.BmiHeader.Width;
_capGrabber.Height = header.BmiHeader.Height;
}
}
_graph.Render(_grabberObject.GetPin(PinDirection.Output, 0));
_grabber.SetBufferSamples(false);
_grabber.SetOneShot(false);
_grabber.SetCallback(_capGrabber, 1);
}
// Get the video window
var wnd = (IVideoWindow)_graph;
wnd.put_AutoShow(false);
// Create the control and run
_control = (IMediaControl)_graph;
_control.Run();
// Wait for the stop signal
_stopSignal.WaitOne();
Cleanup();
}
});
_captureTask.Start();
}
/// <summary> build the capture graph for grabber. </summary>
private bool SetupGraph()
{
const int WS_CHILD = 0x40000000;
const int WS_CLIPCHILDREN = 0x02000000;
const int WS_CLIPSIBLINGS = 0x04000000;
int hr;
hr = _capGraphBuilder2.SetFiltergraph(_graphBuilder);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
hr = _graphBuilder.AddFilter(_capFilter, "Ds.NET Video Capture Device");
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
// will thow up user input for quality
//DsUtils.ShowCapPinDialog(_capGraphBuilder2, _capFilter, IntPtr.Zero);
AMMediaType media = new AMMediaType();
media.majorType = MediaType.Video;
media.subType = MediaSubType.RGB24;
media.formatType = FormatType.VideoInfo; //
hr = _sampGrabber.SetMediaType(media);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
hr = _graphBuilder.AddFilter(_baseGrabFilter, "Ds.NET Grabber");
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
Guid cat;
Guid med;
cat = PinCategory.Capture;
med = MediaType.Video;
hr = _capGraphBuilder2.RenderStream(ref cat, ref med, _capFilter, null, _baseGrabFilter); // _baseGrabFilter
media = new AMMediaType();
hr = _sampGrabber.GetConnectedMediaType(media);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
if ((media.formatType != FormatType.VideoInfo) || (media.formatPtr == IntPtr.Zero))
{
throw new NotSupportedException("Unknown Grabber Media Format");
}
_videoInfoHeader = (VideoInfoHeader)Marshal.PtrToStructure(media.formatPtr, typeof(VideoInfoHeader));
Marshal.FreeCoTaskMem(media.formatPtr); media.formatPtr = IntPtr.Zero;
hr = _sampGrabber.SetBufferSamples(false);
if (hr == 0)
{
hr = _sampGrabber.SetOneShot(false);
}
if (hr == 0)
{
hr = _sampGrabber.SetCallback(null, 0);
}
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
// Render preview (video -> renderer)
hr = _capGraphBuilder2.RenderStream(PinCategory.Preview, ref med, _capFilter, null, null);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
// Get the IVideoWindow interface
_videoWindow = (IVideoWindow)_graphBuilder;
// Set the video window to be a child of the main window
hr = _videoWindow.put_Owner(this._viewControl.Handle);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
// Set video window style
hr = _videoWindow.put_WindowStyle(WS_CHILD | WS_CLIPCHILDREN | WS_CLIPSIBLINGS);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
// Position video window in client rect of owner window
_viewControl.Resize += new EventHandler(onPreviewWindowResize);
onPreviewWindowResize(this, null);
//Make the video window visible, now that it is properly positioned
hr = _videoWindow.put_Visible(DsHlp.OATRUE);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
hr = _mediaCtrl.Run();
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
return(true);
}
/// <summary>
/// Worker thread that captures the images
/// </summary>
private void RunWorker()
{
try
{
// Create the main graph
_graph = Activator.CreateInstance(Type.GetTypeFromCLSID(FilterGraph)) as IGraphBuilder;
// Create the webcam source
_sourceObject = FilterInfo.CreateFilter(_monikerString);
// Create the grabber
_grabber = Activator.CreateInstance(Type.GetTypeFromCLSID(SampleGrabber)) as ISampleGrabber;
_grabberObject = _grabber as IBaseFilter;
// Add the source and grabber to the main graph
_graph.AddFilter(_sourceObject, "source");
_graph.AddFilter(_grabberObject, "grabber");
using (AMMediaType mediaType = new AMMediaType())
{
mediaType.MajorType = MediaTypes.Video;
mediaType.SubType = MediaSubTypes.RGB32;
_grabber.SetMediaType(mediaType);
if (_graph.Connect(_sourceObject.GetPin(PinDirection.Output, 0), _grabberObject.GetPin(PinDirection.Input, 0)) >= 0)
{
if (_grabber.GetConnectedMediaType(mediaType) == 0)
{
// During startup, this code can be too fast, so try at least 3 times
int retryCount = 0;
bool succeeded = false;
while ((retryCount < 3) && !succeeded)
{
// Tried again
retryCount++;
try
{
// Retrieve the grabber information
VideoInfoHeader header = (VideoInfoHeader)Marshal.PtrToStructure(mediaType.FormatPtr, typeof(VideoInfoHeader));
_capGrabber.Width = header.BmiHeader.Width;
_capGrabber.Height = header.BmiHeader.Height;
// Succeeded
succeeded = true;
}
catch (Exception retryException)
{
// Trace
Trace.TraceInformation("Failed to retrieve the grabber information, tried {0} time(s)", retryCount);
// Sleep
Thread.Sleep(50);
}
}
}
}
_graph.Render(_grabberObject.GetPin(PinDirection.Output, 0));
_grabber.SetBufferSamples(false);
_grabber.SetOneShot(false);
_grabber.SetCallback(_capGrabber, 1);
// Get the video window
IVideoWindow wnd = (IVideoWindow)_graph;
wnd.put_AutoShow(false);
wnd = null;
// Create the control and run
_control = (IMediaControl)_graph;
_control.Run();
// Wait for the stop signal
while (!_stopSignal.WaitOne(0, true))
{
Thread.Sleep(10);
}
// Stop when ready
_control.StopWhenReady();
}
}
catch (Exception ex)
{
// Trace
Trace.WriteLine(ex);
}
finally
{
// Clean up
Release();
}
}
/// <summary> Read and store the properties </summary>
private void SaveSizeInfo(ISampleGrabber sampGrabber)
{
int hr;
// Get the media type from the SampleGrabber
AMMediaType media = new AMMediaType();
hr = sampGrabber.GetConnectedMediaType(media);
DsError.ThrowExceptionForHR(hr);
if ((media.formatType != FormatType.VideoInfo) || (media.formatPtr == IntPtr.Zero))
{
throw new NotSupportedException("Unknown Grabber Media Format");
}
// Grab the size info
VideoInfoHeader videoInfoHeader = new VideoInfoHeader();
Marshal.PtrToStructure(media.formatPtr, videoInfoHeader);
//VideoInfoHeader videoInfoHeader = (VideoInfoHeader)Marshal.PtrToStructure(media.formatPtr, typeof(VideoInfoHeader));
videoInfoHeader.BmiHeader.Width = 320;
videoInfoHeader.BmiHeader.Height = 240;
videoWidth = videoInfoHeader.BmiHeader.Width;
videoHeight = videoInfoHeader.BmiHeader.Height;
fStride = videoWidth * (videoInfoHeader.BmiHeader.BitCount / 8);
fPixelArray = new byte[fStride * videoHeight];
// Copy the media structure back
Marshal.StructureToPtr(videoInfoHeader, media.formatPtr, false);
hr = sampleGrabber.SetMediaType(media);
DsError.ThrowExceptionForHR(hr);
DsUtils.FreeAMMediaType(media);
media = null;
}
/// <summary>
/// build the capture graph for grabber.
/// </summary>
private void SetupGraph()
{
int hr;
Guid cat;
Guid med;
try
{
hr = capGraph.SetFiltergraph(graphBuilder);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
hr = graphBuilder.AddFilter(capFilter, "Ds.NET Video Capture Device");
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
AMMediaType media = new AMMediaType();
media.majorType = MediaType.Video;
media.subType = MediaSubType.RGB32;
media.formatType = FormatType.VideoInfo; // ???
hr = sampGrabber.SetMediaType(media);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
hr = graphBuilder.AddFilter(baseGrabFlt, "Ds.NET Grabber");
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
object o;
cat = PinCategory.Capture;
med = MediaType.Video;
Guid iid = typeof(IAMStreamConfig).GUID;
hr = capGraph.FindInterface(
ref cat, ref med, capFilter, ref iid, out o);
videoStreamConfig = o as IAMStreamConfig;
hr = sampGrabber.SetBufferSamples(false);
if (hr == 0)
{
hr = sampGrabber.SetOneShot(false);
}
if (hr == 0)
{
hr = sampGrabber.SetCallback(null, 0);
}
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
BitmapInfoHeader bmiHeader;
bmiHeader = (BitmapInfoHeader)getStreamConfigSetting(videoStreamConfig, "BmiHeader");
bmiHeader.Width = cameraWidth;
bmiHeader.Height = cameraHeight;
setStreamConfigSetting(videoStreamConfig, "BmiHeader", bmiHeader);
bmiHeader = (BitmapInfoHeader)getStreamConfigSetting(videoStreamConfig, "BmiHeader");
if (bmiHeader.Width != cameraWidth)
{
throw new GoblinException("Could not change the resolution to " + cameraWidth + "x" +
cameraHeight + ". The resolution has to be " + bmiHeader.Width + "x" +
bmiHeader.Height);
}
cat = PinCategory.Preview;
med = MediaType.Video;
hr = capGraph.RenderStream(ref cat, ref med, capFilter, null, baseGrabFlt); // baseGrabFlt
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
media = new AMMediaType();
hr = sampGrabber.GetConnectedMediaType(media);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
if ((media.formatType != FormatType.VideoInfo) || (media.formatPtr == IntPtr.Zero))
{
throw new NotSupportedException("Unknown Grabber Media Format");
}
videoInfoHeader = (VideoInfoHeader)Marshal.PtrToStructure(media.formatPtr, typeof(VideoInfoHeader));
Marshal.FreeCoTaskMem(media.formatPtr); media.formatPtr = IntPtr.Zero;
}
catch (Exception ee)
{
throw new GoblinException("Could not setup graph\r\n" + ee.Message);
}
}
// Thread entry point
public void WorkerThread()
{
int hr;
Guid cat;
Guid med;
// grabber
Grabber grabber = new Grabber(this);
// objects
object graphObj = null;
object grabberObj = null;
// interfaces
IGraphBuilder graphBuilder = null;
ICaptureGraphBuilder2 captureGraphBuilder = null;
IBaseFilter videoDeviceFilter = null;
IBaseFilter grabberFilter = null;
ISampleGrabber sg = null;
IMediaControl mc = null;
try
{
// Make a new filter graph
graphObj = Activator.CreateInstance(
Type.GetTypeFromCLSID(Clsid.FilterGraph, true));
graphBuilder = (IGraphBuilder)graphObj;
// Get the Capture Graph Builder
Guid clsid = Clsid.CaptureGraphBuilder2;
Guid riid = typeof(ICaptureGraphBuilder2).GUID;
captureGraphBuilder = (ICaptureGraphBuilder2)
TempFix.CreateDsInstance(ref clsid, ref riid);
// Link the CaptureGraphBuilder to the filter graph
hr = captureGraphBuilder.SetFiltergraph(graphBuilder);
if (hr < 0) Marshal.ThrowExceptionForHR(hr);
// Get the video device and add it to the filter graph
if (source != null)
{
videoDeviceFilter = (IBaseFilter)
Marshal.BindToMoniker(source);
hr = graphBuilder.AddFilter(videoDeviceFilter,
"Video Capture Device");
if (hr < 0) Marshal.ThrowExceptionForHR(hr);
}
// create sample grabber, object and filter
grabberObj = Activator.CreateInstance(
Type.GetTypeFromCLSID(Clsid.SampleGrabber, true));
grabberFilter = (IBaseFilter)grabberObj;
sg = (ISampleGrabber)grabberObj;
// add sample grabber filter to filter graph
hr = graphBuilder.AddFilter(grabberFilter, "grabber");
if (hr < 0) Marshal.ThrowExceptionForHR(hr);
// Try looking for an video device interleaved media type
IBaseFilter testFilter = videoDeviceFilter;
// grabberFilter (not supported)
object o;
cat = PinCategory.Capture;
med = MediaType.Interleaved;
Guid iid = typeof(IAMStreamConfig).GUID;
hr = captureGraphBuilder.FindInterface(
ref cat, ref med, testFilter, ref iid, out o);
if (hr != 0)
{
// If not found, try looking for a video media type
med = MediaType.Video;
hr = captureGraphBuilder.FindInterface(
ref cat, ref med, testFilter, ref iid, out o);
if (hr != 0)
o = null;
}
// Set the video stream configuration to data member
videoStreamConfig = o as IAMStreamConfig;
o = null;
// Experimental testing: Try to set the Frame Size & Rate
// Results: When enabled, the grabber video breaks up into
// several duplicate frames (6 frames)
bool bdebug = true;
if (bdebug)
{
BitmapInfoHeader bmiHeader;
bmiHeader = (BitmapInfoHeader)
getStreamConfigSetting(videoStreamConfig, "BmiHeader");
bmiHeader.Width = framesize.Width;
bmiHeader.Height = framesize.Height;
setStreamConfigSetting(videoStreamConfig,
"BmiHeader", bmiHeader);
long avgTimePerFrame = (long)(10000000 / framerate);
setStreamConfigSetting(videoStreamConfig,
"AvgTimePerFrame", avgTimePerFrame);
}
// connect pins (Turns on the video device)
if (graphBuilder.Connect(DSTools.GetOutPin(
videoDeviceFilter, 0),
DSTools.GetInPin(grabberFilter, 0)) < 0)
throw new ApplicationException(
"Failed connecting filters");
// Set the sample grabber media type settings
AMMediaType mt = new AMMediaType();
mt.majorType = MediaType.Video;
mt.subType = MediaSubType.RGB24;
sg.SetMediaType(mt);
// get media type
if (sg.GetConnectedMediaType(mt) == 0)
{
VideoInfoHeader vih = (VideoInfoHeader)Marshal.PtrToStructure(mt.formatPtr, typeof(VideoInfoHeader));
System.Diagnostics.Debug.WriteLine("width = " + vih.BmiHeader.Width + ", height = " + vih.BmiHeader.Height);
grabber.Width = vih.BmiHeader.Width;
grabber.Height = vih.BmiHeader.Height;
mt.Dispose();
}
// render
graphBuilder.Render(DSTools.GetOutPin(grabberFilter, 0));
// Set various sample grabber properties
sg.SetBufferSamples(false);
sg.SetOneShot(false);
sg.SetCallback(grabber, 1);
// Do not show active (source) window
IVideoWindow win = (IVideoWindow)graphObj;
win.put_AutoShow(false);
win = null;
// get media control
mc = (IMediaControl)graphObj;
// run
mc.Run();
while (!stopEvent.WaitOne(0, true))
{
Thread.Sleep(100);
}
mc.StopWhenReady();
}
// catch any exceptions
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine("----: " + e.Message);
}
// finalization block
finally
{
// release all objects
mc = null;
graphBuilder = null;
captureGraphBuilder = null;
videoDeviceFilter = null;
grabberFilter = null;
sg = null;
if (graphObj != null)
{
Marshal.ReleaseComObject(graphObj);
graphObj = null;
}
if (grabberObj != null)
{
Marshal.ReleaseComObject(grabberObj);
grabberObj = null;
}
}
}
/// <summary>
/// Open a new video feed (either web-cam or video file).
/// </summary>
/// <param name="filter">Specifies the web-cam filter to use, or <i>null</i> when opening a video file.</param>
/// <param name="pb">Specifies the output window, or <i>null</i> when running headless and only receiving snapshots.</param>
/// <param name="strFile">Specifies the video file to use, or <i>null</i> when opening a web-cam feed.</param>
/// <returns></returns>
public long Open(Filter filter, PictureBox pb, string strFile)
{
int hr;
if (filter != null && strFile != null)
{
throw new ArgumentException("Both the filter and file are non NULL - only one of these can be used at a time; The filter is used with the web-cam and the file is used with a video file.");
}
m_selectedFilter = filter;
m_graphBuilder = (IFilterGraph2)Activator.CreateInstance(Type.GetTypeFromCLSID(Clsid.FilterGraph, true));
// When using a web-cam, create the moniker for the filter and add the filter to the graph.
if (strFile == null)
{
IMoniker moniker = m_selectedFilter.CreateMoniker();
m_graphBuilder.AddSourceFilterForMoniker(moniker, null, m_selectedFilter.Name, out m_camFilter);
Marshal.ReleaseComObject(moniker);
m_camControl = m_camFilter as IAMCameraControl;
// Create the capture builder used to build the web-cam filter graph.
m_captureGraphBuilder = (ICaptureGraphBuilder2)Activator.CreateInstance(Type.GetTypeFromCLSID(Clsid.CaptureGraphBuilder2, true));
hr = m_captureGraphBuilder.SetFiltergraph(m_graphBuilder as IGraphBuilder);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
// Add the web-cam filter to the graph.
hr = m_graphBuilder.AddFilter(m_camFilter, m_selectedFilter.Name);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
}
else
{
// Build the graph with the video file.
hr = m_graphBuilder.RenderFile(strFile, null);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
m_mediaSeek = m_graphBuilder as IMediaSeeking;
if (pb != null)
{
m_videoFrameStep = m_graphBuilder as IVideoFrameStep;
}
}
// Create the sample grabber used to get snapshots.
m_sampleGrabber = (ISampleGrabber)Activator.CreateInstance(Type.GetTypeFromCLSID(Clsid.SampleGrabber, true));
m_baseGrabFilter = m_sampleGrabber as IBaseFilter;
m_mediaControl = m_graphBuilder as IMediaControl;
// When using a target window, get the video window used with the target output window
if (pb != null)
{
m_mediaEventEx = m_graphBuilder as IMediaEventEx;
m_videoWindow = m_graphBuilder as IVideoWindow;
}
// Otherwise create the null renderer for no video output is needed (only snapshots).
else
{
m_nullRenderer = (IBaseFilter)Activator.CreateInstance(Type.GetTypeFromCLSID(Clsid.NullRenderer, true));
}
// Add the sample grabber to the filte graph.
hr = m_graphBuilder.AddFilter(m_baseGrabFilter, "Ds.Lib Grabber");
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
// Turn off the sample grabber buffers.
hr = m_sampleGrabber.SetBufferSamples(false);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
// Turn off the sample grabber one-shot.
hr = m_sampleGrabber.SetOneShot(false);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
// Turn ON the sample grabber callback where video data is to be received.
hr = m_sampleGrabber.SetCallback(this, 1);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
// Set the media format used by the sample grabber.
AMMediaType media = new AMMediaType();
media.majorType = MediaType.Video;
media.subType = MediaSubType.RGB24;
media.formatType = FormatType.VideoInfo;
hr = m_sampleGrabber.SetMediaType(media);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
// Connect the WebCam Filters and Frame Grabber.
if (m_selectedFilter != null)
{
Guid cat;
Guid med;
cat = PinCategory.Preview;
med = MediaType.Video;
hr = m_captureGraphBuilder.RenderStream(ref cat, ref med, m_camFilter, null, null);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
cat = PinCategory.Capture;
med = MediaType.Video;
hr = m_captureGraphBuilder.RenderStream(ref cat, ref med, m_camFilter, null, m_baseGrabFilter);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
}
// Connect the Frame Grabber and (optionally the Null Renderer)
else
{
// Get the video decoder and its pins.
m_videoFilter = Utility.GetFilter(m_graphBuilder as IGraphBuilder, "Video Decoder", false);
IPin pOutput;
hr = Utility.GetPin(m_videoFilter, PinDirection.Output, out pOutput);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
IPin pInput;
hr = pOutput.ConnectedTo(out pInput);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
PinInfo pinInfo;
hr = pInput.QueryPinInfo(out pinInfo);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
// Get the sample grabber pins.
IPin pGrabInput;
hr = Utility.GetPin(m_baseGrabFilter, PinDirection.Input, out pGrabInput);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
IPin pGrabOutput;
hr = Utility.GetPin(m_baseGrabFilter, PinDirection.Output, out pGrabOutput);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
// Disconnect the source filter output and the input it is connected to.
hr = pOutput.Disconnect();
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
hr = pInput.Disconnect();
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
// Connect the source output to the Grabber input.
hr = m_graphBuilder.Connect(pOutput, pGrabInput);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
// When rendering video output, connect the Grabber output to the original downstream input that the source was connected to.
if (m_nullRenderer == null)
{
hr = m_graphBuilder.Connect(pGrabOutput, pInput);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
}
Marshal.ReleaseComObject(pOutput);
Marshal.ReleaseComObject(pInput);
Marshal.ReleaseComObject(pGrabInput);
Marshal.ReleaseComObject(pGrabOutput);
}
// Remove sound filters.
IBaseFilter soundFilter = Utility.GetFilter(m_graphBuilder as IGraphBuilder, "Audio Decoder", false);
if (soundFilter != null)
{
hr = m_graphBuilder.RemoveFilter(soundFilter);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
Marshal.ReleaseComObject(soundFilter);
}
soundFilter = Utility.GetFilter(m_graphBuilder as IGraphBuilder, "Sound", false);
if (soundFilter != null)
{
hr = m_graphBuilder.RemoveFilter(soundFilter);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
Marshal.ReleaseComObject(soundFilter);
}
// When using a headless (no video rendering) setup, connect the null renderer to the Sample Grabber.
if (m_nullRenderer != null)
{
// Add the null renderer.
hr = m_graphBuilder.AddFilter(m_nullRenderer, "Null Renderer");
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
// Get the sample grabber output pin.
IPin pGrabOutput;
hr = Utility.GetPin(m_baseGrabFilter, PinDirection.Output, out pGrabOutput);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
// Get the null renderer input pin.
IPin pInput;
hr = Utility.GetPin(m_nullRenderer, PinDirection.Input, out pInput);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
// Disconnect the sample grabber pin.
hr = pGrabOutput.Disconnect();
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
// Connect the Grabber output to the null renderer.
hr = m_graphBuilder.Connect(pGrabOutput, pInput);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
Marshal.ReleaseComObject(pInput);
Marshal.ReleaseComObject(pGrabOutput);
// Remove the Video Renderer for it is no longer needed.
IBaseFilter ivideorender = Utility.GetFilter(m_graphBuilder as IGraphBuilder, "Video Renderer");
if (ivideorender != null)
{
m_graphBuilder.RemoveFilter(ivideorender);
Marshal.ReleaseComObject(ivideorender);
}
}
// Get the sample grabber media settings and video header.
media = new AMMediaType();
hr = m_sampleGrabber.GetConnectedMediaType(media);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
if ((media.formatType != FormatType.VideoInfo &&
media.formatType != FormatType.WaveEx &&
media.formatType != FormatType.MpegVideo) ||
media.formatPtr == IntPtr.Zero)
{
throw new Exception("Media grabber format is unknown.");
}
// Get the video header with frame sizing information.
m_videoInfoHeader = Marshal.PtrToStructure(media.formatPtr, typeof(VideoInfoHeader)) as VideoInfoHeader;
Marshal.FreeCoTaskMem(media.formatPtr);
media.formatPtr = IntPtr.Zero;
// If we are rendering video output, setup the video window (which requires a message pump).
if (m_videoWindow != null)
{
// setup the video window
hr = m_videoWindow.put_Owner(pb.Handle);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
hr = m_videoWindow.put_WindowStyle(WS_CHILD | WS_CLIPCHILDREN | WS_CLIPSIBLINGS);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
// resize the window
hr = m_videoWindow.SetWindowPosition(0, 0, pb.Width, pb.Height);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
hr = m_videoWindow.put_Visible(DsHlp.OATRUE);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
}
// start the capturing
hr = m_mediaControl.Run();
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
// When using a video file, immediately stop at the start.
if (strFile != null)
{
hr = m_mediaControl.Pause();
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
}
// When using a media file, we need to save the video file's duration.
if (m_mediaSeek != null)
{
hr = m_mediaSeek.GetDuration(out m_lDuration);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
}
m_bConnected = true;
return(m_lDuration);
}
/// <summary>
/// Saves the video properties of the SampleGrabber into member fields
/// and creates a file mapping for the captured frames.
/// </summary>
/// <param name="sampGrabber">The <see cref="ISampleGrabber"/>
/// from which to retreive the sample information.</param>
private void SaveSizeInfo(ISampleGrabber sampGrabber)
{
int hr;
// Get the media type from the SampleGrabber
var media = new AMMediaType();
hr = sampGrabber.GetConnectedMediaType(media);
//if (hr != 0)
//{
// ErrorLogger.WriteLine("Could not SaveSizeInfo in Camera.Capture. Message: " + DsError.GetErrorText(hr));
//}
//if ((media.formatType != FormatType.VideoInfo) || (media.formatPtr == IntPtr.Zero))
//{
// ErrorLogger.WriteLine("Error in Camera.Capture. Unknown Grabber Media Format");
//}
// Grab the size info
var videoInfoHeader = (VideoInfoHeader)Marshal.PtrToStructure(media.formatPtr, typeof(VideoInfoHeader));
width = videoInfoHeader.BmiHeader.Width;
height = videoInfoHeader.BmiHeader.Height;
stride = width * (videoInfoHeader.BmiHeader.BitCount / 8);
this.fps = (int)(10000000 / videoInfoHeader.AvgTimePerFrame);
bufferLength = width * height * 3; // RGB24 = 3 bytes
// create memory section and map for the OpenCV Image.
section = CreateFileMapping(new IntPtr(-1), IntPtr.Zero, 0x04, 0, (uint)bufferLength, null);
map = MapViewOfFile(section, 0xF001F, 0, 0, (uint)bufferLength);
videoImage = new Image<Bgr, byte>(width, height, stride, map);
DsUtils.FreeAMMediaType(media);
media = null;
}
/// <summary>
/// Connects the filters of a previously created graph
/// (created by CreateGraph()). Once rendered the graph
/// is ready to be used. This method may also destroy
/// streams if we have streams we no longer want.
/// </summary>
void RenderGraph()
{
var didSomething = false;
// Stop the graph
_mediaControl?.Stop();
// Create the graph if needed (group should already be created)
CreateGraph();
// Derender the graph if we have a capture or preview stream
// that we no longer want. We can't derender the capture and
// preview streams seperately.
// Notice the second case will leave a capture stream intact
// even if we no longer want it. This allows the user that is
// not using the preview to Stop() and Start() without
// rerendering the graph.
if (!_wantPreviewRendered && _isPreviewRendered)
{
DerenderGraph();
}
// Render preview stream (only if necessary)
if (_wantPreviewRendered && !_isPreviewRendered)
{
// Render preview (video -> renderer)
var cat = PinCategory.Preview;
var med = MediaType.Video;
var hr = _captureGraphBuilder.RenderStream(cat, med, _videoDeviceFilter, _baseGrabFlt, null);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
// Get the IVideoWindow interface
_videoWindow = (IVideoWindow)_graphBuilder;
// Set the video window to be a child of the main window
hr = _videoWindow.put_Owner(PreviewWindow);
_videoWindow.put_MessageDrain(_form.Handle);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
// Set video window style
hr = _videoWindow.put_WindowStyle(WindowStyle.Child | WindowStyle.ClipChildren | WindowStyle.ClipSiblings);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
// Make the video window visible, now that it is properly positioned
hr = _videoWindow.put_Visible(OABool.True);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
_isPreviewRendered = true;
didSomething = true;
var media = new AMMediaType();
hr = _sampGrabber.GetConnectedMediaType(media);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
if (media.formatType != FormatType.VideoInfo || media.formatPtr == IntPtr.Zero)
{
throw new NotSupportedException("Unknown Grabber Media Format");
}
_videoInfoHeader = (VideoInfoHeader)Marshal.PtrToStructure(media.formatPtr, typeof(VideoInfoHeader));
Marshal.FreeCoTaskMem(media.formatPtr); media.formatPtr = IntPtr.Zero;
}
if (didSomething)
{
_actualGraphState = GraphState.Rendered;
}
}
/// <summary> build the capture graph. </summary>
bool SetupGraph()
{
int hr;
IBaseFilter mux = null;
IFileSinkFilter sink = null;
try
{
hr = capGraph.SetFiltergraph(graphBuilder);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
hr = graphBuilder.AddFilter(capFilter, "Ds.NET Video Capture Device");
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
AMMediaType media = new AMMediaType();
media.majorType = MediaType.Video;
media.subType = MediaSubType.RGB24;
media.formatType = FormatType.VideoInfo; // ???
hr = sampGrabber.SetMediaType(media);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
hr = graphBuilder.AddFilter(baseGrabFlt, "Ds.NET Grabber");
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
Guid cat = PinCategory.Preview;
Guid med = MediaType.Video;
hr = capGraph.RenderStream(ref cat, ref med, capFilter, null, null); // preview
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
cat = PinCategory.Capture;
med = MediaType.Video;
hr = capGraph.RenderStream(ref cat, ref med, capFilter, null, baseGrabFlt); // capture
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
media = new AMMediaType();
hr = sampGrabber.GetConnectedMediaType(media);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
if ((media.formatType != FormatType.VideoInfo) || (media.formatPtr == IntPtr.Zero))
{
throw new NotSupportedException("Unknown Grabber Media Format");
}
videoInfoHeader = (VideoInfoHeader)Marshal.PtrToStructure(media.formatPtr, typeof(VideoInfoHeader));
Marshal.FreeCoTaskMem(media.formatPtr); media.formatPtr = IntPtr.Zero;
hr = sampGrabber.SetBufferSamples(false);
if (hr == 0)
{
hr = sampGrabber.SetOneShot(false);
}
if (hr == 0)
{
hr = sampGrabber.SetCallback(null, 0);
}
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
return(true);
}
catch (Exception ee)
{
MessageBox.Show(this, "Could not setup graph\r\n" + ee.Message, "DirectShow.NET", MessageBoxButtons.OK, MessageBoxIcon.Stop);
return(false);
}
finally
{
if (mux != null)
{
Marshal.ReleaseComObject(mux);
}
mux = null;
if (sink != null)
{
Marshal.ReleaseComObject(sink);
}
sink = null;
}
}
private void setupDirectShowFilterGraph()
{
if (mediaControl != null && running)
{
Stop();
}
if (device == null)
{
filterGraph = null;
mediaControl = null;
}
else
{
filterGraph = (IFilterGraph2) new FilterGraph();
mediaControl = (IMediaControl)filterGraph;
ICaptureGraphBuilder2 captureGraphBuilder = (ICaptureGraphBuilder2) new CaptureGraphBuilder2();
captureGraphBuilder.SetFiltergraph((IGraphBuilder)filterGraph);
// capture filter
IBaseFilter captureFilter;
filterGraph.AddSourceFilterForMoniker(device.Moniker, null, device.Name, out captureFilter);
// sample grabber
ISampleGrabber sampleGrabber = (ISampleGrabber) new SampleGrabber();
IBaseFilter sampleGrabberFilter = (IBaseFilter)sampleGrabber;
AMMediaType mediaType = new AMMediaType();
mediaType.majorType = new Guid(0x73646976, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71); // MEDIATYPE_Video
mediaType.subType = new Guid(0xe436eb7d, 0x524f, 0x11ce, 0x9f, 0x53, 0x00, 0x20, 0xaf, 0x0b, 0xa7, 0x70); // MEDIASUBTYPE_RGB24
mediaType.formatType = new Guid(0x05589f80, 0xc356, 0x11ce, 0xbf, 0x01, 0x00, 0xaa, 0x00, 0x55, 0x59, 0x5a); // FORMAT_VideoInfo
sampleGrabber.SetMediaType(mediaType);
mediaType.Free();
sampleGrabber.SetOneShot(false);
sampleGrabber.SetBufferSamples(false);
sampleGrabber.SetCallback(this, 1);
filterGraph.AddFilter(sampleGrabberFilter, "ZunTzu Sample Grabber");
// configure the video stream to 160x120@15fps
object interfaceFound;
captureGraphBuilder.FindInterface(
new Guid(0xfb6c4281, 0x0353, 0x11d1, 0x90, 0x5f, 0x00, 0x00, 0xc0, 0xcc, 0x16, 0xba), // PIN_CATEGORY_CAPTURE
new Guid(0x73646976, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71), // MEDIATYPE_Video
captureFilter, typeof(IAMStreamConfig).GUID, out interfaceFound);
IAMStreamConfig videoStreamConfig = (IAMStreamConfig)interfaceFound;
videoStreamConfig.GetFormat(out mediaType);
VideoInfoHeader infoHeader = new VideoInfoHeader();
Marshal.PtrToStructure(mediaType.formatPtr, infoHeader);
infoHeader.AvgTimePerFrame = 10000000 / 15;
infoHeader.BmiHeader.Width = 160;
infoHeader.BmiHeader.Height = 120;
Marshal.StructureToPtr(infoHeader, mediaType.formatPtr, false);
videoStreamConfig.SetFormat(mediaType);
mediaType.Free();
// renderer
IBaseFilter nullRenderer = (IBaseFilter) new NullRenderer();
filterGraph.AddFilter(nullRenderer, "Null Renderer");
captureGraphBuilder.RenderStream(
new Guid(0xfb6c4281, 0x0353, 0x11d1, 0x90, 0x5f, 0x00, 0x00, 0xc0, 0xcc, 0x16, 0xba), // PIN_CATEGORY_CAPTURE
new Guid(0x73646976, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71), // MEDIATYPE_Video
captureFilter, sampleGrabberFilter, nullRenderer);
// retrieve frame size
sampleGrabber.GetConnectedMediaType(mediaType);
Marshal.PtrToStructure(mediaType.formatPtr, infoHeader);
frameRate = 10000000.0f / infoHeader.AvgTimePerFrame;
frameSize = new Size(infoHeader.BmiHeader.Width, infoHeader.BmiHeader.Height);
mediaType.Free();
}
}
public void WorkerThread()
{
Grabber pCallback = new Grabber(this);
object o = null;
object ppvResult = null;
object obj4 = null;
IGraphBuilder builder = null;
IBaseFilter pFilter = null;
IBaseFilter filter2 = null;
ISampleGrabber grabber2 = null;
IMediaControl control = null;
try
{
Type typeFromCLSID = Type.GetTypeFromCLSID(Clsid.FilterGraph);
if (typeFromCLSID == null)
{
throw new ApplicationException("Failed creating filter graph");
}
o = Activator.CreateInstance(typeFromCLSID);
builder = (IGraphBuilder)o;
UCOMIBindCtx ppbc = null;
UCOMIMoniker ppmk = null;
int pchEaten = 0;
if (Win32.CreateBindCtx(0, out ppbc) == 0)
{
if (Win32.MkParseDisplayName(ppbc, this.source, ref pchEaten, out ppmk) == 0)
{
Guid gUID = typeof(IBaseFilter).GUID;
ppmk.BindToObject(null, null, ref gUID, out ppvResult);
Marshal.ReleaseComObject(ppmk);
ppmk = null;
}
Marshal.ReleaseComObject(ppbc);
ppbc = null;
}
if (ppvResult == null)
{
throw new ApplicationException("Failed creating device object for moniker");
}
pFilter = (IBaseFilter)ppvResult;
typeFromCLSID = Type.GetTypeFromCLSID(Clsid.SampleGrabber);
if (typeFromCLSID == null)
{
throw new ApplicationException("Failed creating sample grabber");
}
obj4 = Activator.CreateInstance(typeFromCLSID);
grabber2 = (ISampleGrabber)obj4;
filter2 = (IBaseFilter)obj4;
builder.AddFilter(pFilter, "source");
builder.AddFilter(filter2, "grabber");
AMMediaType pmt = new AMMediaType {
majorType = MediaType.Video,
subType = MediaSubType.RGB24
};
grabber2.SetMediaType(pmt);
if (builder.Connect(DSTools.GetOutPin(pFilter, 0), DSTools.GetInPin(filter2, 0)) < 0)
{
throw new ApplicationException("Failed connecting filters");
}
if (grabber2.GetConnectedMediaType(pmt) == 0)
{
VideoInfoHeader header = (VideoInfoHeader)Marshal.PtrToStructure(pmt.formatPtr, typeof(VideoInfoHeader));
pCallback.Width = header.BmiHeader.Width;
pCallback.Height = header.BmiHeader.Height;
pmt.Dispose();
}
builder.Render(DSTools.GetOutPin(filter2, 0));
grabber2.SetBufferSamples(false);
grabber2.SetOneShot(false);
grabber2.SetCallback(pCallback, 1);
((IVideoWindow)o).put_AutoShow(false);
control = (IMediaControl)o;
control.Run();
while (!this.stopEvent.WaitOne(0, true))
{
Thread.Sleep(100);
}
control.StopWhenReady();
}
catch (Exception)
{
}
finally
{
control = null;
builder = null;
pFilter = null;
filter2 = null;
grabber2 = null;
if (o != null)
{
Marshal.ReleaseComObject(o);
o = null;
}
if (ppvResult != null)
{
Marshal.ReleaseComObject(ppvResult);
ppvResult = null;
}
if (obj4 != null)
{
Marshal.ReleaseComObject(obj4);
obj4 = null;
}
}
}
/// <summary>
/// Worker thread.
/// </summary>
///
private void WorkerThread( )
{
ReasonToFinishPlaying reasonToStop = ReasonToFinishPlaying.StoppedByUser;
// grabber
Grabber grabber = new Grabber(this);
// objects
object graphObject = null;
object grabberObject = null;
// interfaces
IGraphBuilder graph = null;
IBaseFilter sourceBase = null;
IBaseFilter grabberBase = null;
ISampleGrabber sampleGrabber = null;
IMediaControl mediaControl = null;
IMediaEventEx mediaEvent = 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
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
grabberObject = Activator.CreateInstance(type);
sampleGrabber = (ISampleGrabber)grabberObject;
grabberBase = (IBaseFilter)grabberObject;
// add grabber filters to graph
graph.AddFilter(grabberBase, "grabber");
// set media type
AMMediaType mediaType = new AMMediaType( );
mediaType.MajorType = MediaType.Video;
mediaType.SubType = MediaSubType.RGB24;
sampleGrabber.SetMediaType(mediaType);
// connect pins
int pinToTry = 0;
IPin inPin = Tools.GetInPin(grabberBase, 0);
IPin outPin = null;
// find output pin acceptable by sample grabber
while (true)
{
outPin = Tools.GetOutPin(sourceBase, pinToTry);
if (outPin == null)
{
Marshal.ReleaseComObject(inPin);
throw new ApplicationException("Did not find acceptable output video pin in the given source");
}
if (graph.Connect(outPin, inPin) < 0)
{
Marshal.ReleaseComObject(outPin);
outPin = null;
pinToTry++;
}
else
{
break;
}
}
Marshal.ReleaseComObject(outPin);
Marshal.ReleaseComObject(inPin);
// get media type
if (sampleGrabber.GetConnectedMediaType(mediaType) == 0)
{
VideoInfoHeader vih = (VideoInfoHeader)Marshal.PtrToStructure(mediaType.FormatPtr, typeof(VideoInfoHeader));
grabber.Width = vih.BmiHeader.Width;
grabber.Height = vih.BmiHeader.Height;
mediaType.Dispose( );
}
// let's do rendering, if we don't need to prevent freezing
if (!preventFreezing)
{
// render pin
graph.Render(Tools.GetOutPin(grabberBase, 0));
// configure video window
IVideoWindow window = (IVideoWindow)graphObject;
window.put_AutoShow(false);
window = null;
}
// configure sample grabber
sampleGrabber.SetBufferSamples(false);
sampleGrabber.SetOneShot(false);
sampleGrabber.SetCallback(grabber, 1);
// disable clock, if someone requested it
if (!referenceClockEnabled)
{
IMediaFilter mediaFilter = (IMediaFilter)graphObject;
mediaFilter.SetSyncSource(null);
}
// get media control
mediaControl = (IMediaControl)graphObject;
// get media events' interface
mediaEvent = (IMediaEventEx)graphObject;
IntPtr p1, p2;
DsEvCode code;
// run
mediaControl.Run( );
do
{
if (mediaEvent != null)
{
if (mediaEvent.GetEvent(out code, out p1, out p2, 0) >= 0)
{
mediaEvent.FreeEventParams(code, p1, p2);
if (code == DsEvCode.Complete)
{
reasonToStop = ReasonToFinishPlaying.EndOfStreamReached;
break;
}
}
}
}while (!stopEvent.WaitOne(100, false));
mediaControl.Stop( );
}
catch (Exception exception)
{
// provide information to clients
if (VideoSourceError != null)
{
VideoSourceError(this, new VideoSourceErrorEventArgs(exception.Message));
}
}
finally
{
// release all objects
graph = null;
grabberBase = null;
sampleGrabber = null;
mediaControl = null;
mediaEvent = null;
if (graphObject != null)
{
Marshal.ReleaseComObject(graphObject);
graphObject = null;
}
if (sourceBase != null)
{
Marshal.ReleaseComObject(sourceBase);
sourceBase = null;
}
if (grabberObject != null)
{
Marshal.ReleaseComObject(grabberObject);
grabberObject = null;
}
}
if (PlayingFinished != null)
{
PlayingFinished(this, reasonToStop);
}
}
/// <summary>
/// Read and store the properties
/// </summary>
/// <param name="sampGrabber">The samp grabber.</param>
private void SaveSizeInfo(ISampleGrabber sampGrabber)
{
int hr;
// Get the media type from the SampleGrabber
AMMediaType media = new AMMediaType();
hr = sampGrabber.GetConnectedMediaType(media);
checkHR(hr,"SaveSizeInfo");
if ((media.formatType != FormatType.VideoInfo) || (media.formatPtr == IntPtr.Zero))
{
throw new NotSupportedException("Unknown Grabber Media Format");
}
// Grab the size info
VideoInfoHeader videoInfoHeader = (VideoInfoHeader)Marshal.PtrToStructure(media.formatPtr, typeof(VideoInfoHeader));
_SGvideoWidth = videoInfoHeader.BmiHeader.Width;
_SGvideoHeight = videoInfoHeader.BmiHeader.Height;
_SGstride = _SGvideoWidth * (videoInfoHeader.BmiHeader.BitCount / 8);
_hud.VideoHeight = _SGvideoHeight;
_hud.VideoWidth = _SGvideoWidth;
DsUtils.FreeAMMediaType(media);
media = null;
}
/// <summary>
/// Worker thread.
/// </summary>
///
private void WorkerThread( )
{
// grabber
Grabber grabber = new Grabber(this);
// objects
object graphObject = null;
object sourceObject = null;
object grabberObject = null;
// interfaces
IGraphBuilder graph = null;
IBaseFilter sourceBase = null;
IBaseFilter grabberBase = null;
ISampleGrabber sampleGrabber = null;
IMediaControl mediaControl = null;
IFileSourceFilter fileSource = 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
type = Type.GetTypeFromCLSID(Clsid.AsyncReader);
if (type == null)
{
throw new ApplicationException("Failed creating filter async reader");
}
sourceObject = Activator.CreateInstance(type);
sourceBase = (IBaseFilter)sourceObject;
fileSource = (IFileSourceFilter)sourceObject;
fileSource.Load(fileName, null);
// get type for sample grabber
type = Type.GetTypeFromCLSID(Clsid.SampleGrabber);
if (type == null)
{
throw new ApplicationException("Failed creating sample grabber");
}
// create sample grabber
grabberObject = Activator.CreateInstance(type);
sampleGrabber = (ISampleGrabber)grabberObject;
grabberBase = (IBaseFilter)grabberObject;
// add source and grabber filters to graph
graph.AddFilter(sourceBase, "source");
graph.AddFilter(grabberBase, "grabber");
// set media type
AMMediaType mediaType = new AMMediaType( );
mediaType.MajorType = MediaType.Video;
mediaType.SubType = MediaSubType.RGB24;
sampleGrabber.SetMediaType(mediaType);
// connect pins
if (graph.Connect(Tools.GetOutPin(sourceBase, 0), Tools.GetInPin(grabberBase, 0)) < 0)
{
throw new ApplicationException("Failed connecting filters");
}
// get media type
if (sampleGrabber.GetConnectedMediaType(mediaType) == 0)
{
VideoInfoHeader vih = (VideoInfoHeader)Marshal.PtrToStructure(mediaType.FormatPtr, typeof(VideoInfoHeader));
grabber.Width = vih.BmiHeader.Width;
grabber.Height = vih.BmiHeader.Height;
mediaType.Dispose( );
}
// let's do rendering, if we don't need to prevent freezing
if (!preventFreezing)
{
// render pin
graph.Render(Tools.GetOutPin(grabberBase, 0));
// configure video window
IVideoWindow window = (IVideoWindow)graphObject;
window.put_AutoShow(false);
window = null;
}
// configure sample grabber
sampleGrabber.SetBufferSamples(false);
sampleGrabber.SetOneShot(false);
sampleGrabber.SetCallback(grabber, 1);
// get media control
mediaControl = (IMediaControl)graphObject;
// run
mediaControl.Run( );
while (!stopEvent.WaitOne(0, true))
{
Thread.Sleep(100);
}
mediaControl.StopWhenReady( );
}
catch (Exception exception)
{
// provide information to clients
if (VideoSourceError != null)
{
VideoSourceError(this, new VideoSourceErrorEventArgs(exception.Message));
}
}
finally
{
// release all objects
graph = null;
sourceBase = null;
grabberBase = null;
sampleGrabber = null;
mediaControl = null;
fileSource = null;
if (graphObject != null)
{
Marshal.ReleaseComObject(graphObject);
graphObject = null;
}
if (sourceObject != null)
{
Marshal.ReleaseComObject(sourceObject);
sourceObject = null;
}
if (grabberObject != null)
{
Marshal.ReleaseComObject(grabberObject);
grabberObject = null;
}
}
}
private bool SetupGraph()
{
int hr;
try {
hr = capGraph.SetFiltergraph(graphBuilder);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
hr = graphBuilder.AddFilter(capFilter, "Ds.NET Video Capture Device");
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
//DsUtils.ShowCapPinDialog(capGraph, capFilter, this.Handle);
AMMediaType media = new AMMediaType();
media.majorType = MediaType.Video;
media.subType = MediaSubType.RGB24;
media.formatType = FormatType.VideoInfo; // ???
hr = sampGrabber.SetMediaType(media);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
hr = graphBuilder.AddFilter(baseGrabFlt, "Ds.NET Grabber");
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
Guid cat = PinCategory.Preview;
Guid med = MediaType.Video;
hr = capGraph.RenderStream(ref cat, ref med, capFilter, null, null); // baseGrabFlt
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
cat = PinCategory.Capture;
med = MediaType.Video;
hr = capGraph.RenderStream(ref cat, ref med, capFilter, null, baseGrabFlt); // baseGrabFlt
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
media = new AMMediaType();
hr = sampGrabber.GetConnectedMediaType(media);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
if ((media.formatType != FormatType.VideoInfo) || (media.formatPtr == IntPtr.Zero))
{
throw new NotSupportedException("Unknown Grabber Media Format");
}
videoInfoHeader = (VideoInfoHeader)Marshal.PtrToStructure(media.formatPtr, typeof(VideoInfoHeader));
Marshal.FreeCoTaskMem(media.formatPtr); media.formatPtr = IntPtr.Zero;
hr = sampGrabber.SetBufferSamples(false);
if (hr == 0)
{
hr = sampGrabber.SetOneShot(false);
}
if (hr == 0)
{
hr = sampGrabber.SetCallback(null, 0);
}
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
return(true);
}
catch (Exception ee) {
return(false);
}
}
public int BufferCB(double SampleTime, IntPtr pBuffer, int BufferLen)
{
DateTime now = DateTime.UtcNow;
if ((now - _last).TotalMilliseconds > 150) // just to avoid issues with bad cameras
{
_last = now;
try
{
if (_width == 0)
{
var mediaType = new AMMediaType();
_grabber.GetConnectedMediaType(mediaType);
LocalVideoSourceManager.GetMediaTypeInfo(mediaType, out _height, out _width, out var _, out var _, out var _);
if (_width == 0 || _height == 0)
{
throw new InvalidOperationException($"Unable to GetMediaTypeInfo");
}
}
if (_getFrames)
{
BitmapSource image = BitmapSource.Create(
_width,
_height,
96,
96,
PixelFormats.Bgr24,
null,
pBuffer,
BufferLen,
_width * 3);
JpegBitmapEncoder encoder = new JpegBitmapEncoder {
QualityLevel = _width > 500 ? 30 : 50
};
encoder.Frames.Add(BitmapFrame.Create(image));
_stream.Position = 0;
encoder.Save(_stream);
var buffer = new byte[_stream.Position];
Array.Copy(_stream.GetBuffer(), buffer, _stream.Position);
_callback(new VideoInputPreview
{
Data = buffer,
W = _width,
H = _height
});
}
else
{
_callback(null);
}
}
catch (Exception e)
{
Log.Warning(e, $"Grabbing of '{_name}' failed");
}
}
return(0);
}
// Thread entry point
public void WorkerThread()
{
int hr;
Guid cat;
Guid med;
// grabber
Grabber grabber = new Grabber(this);
// objects
object graphObj = null;
object grabberObj = null;
// interfaces
IGraphBuilder graphBuilder = null;
DShowNET.ICaptureGraphBuilder2 captureGraphBuilder = null;
IBaseFilter videoDeviceFilter = null;
IBaseFilter grabberFilter = null;
ISampleGrabber sg = null;
IMediaControl mc = null;
try
{
// Make a new filter graph
graphObj = Activator.CreateInstance(Type.GetTypeFromCLSID(DShowNET.Clsid.FilterGraph, true));
graphBuilder = (IGraphBuilder)graphObj;
// Get the Capture Graph Builder
Guid clsid = DShowNET.Clsid.CaptureGraphBuilder2;
Guid riid = typeof(DShowNET.ICaptureGraphBuilder2).GUID;
captureGraphBuilder = (DShowNET.ICaptureGraphBuilder2)DShowNET.DsBugWO.CreateDsInstance(ref clsid, ref riid);
// Link the CaptureGraphBuilder to the filter graph
hr = captureGraphBuilder.SetFiltergraph((DShowNET.IGraphBuilder)graphBuilder);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
int rotCookie = 0;
DShowNET.DsROT.AddGraphToRot(graphBuilder, out rotCookie);
// Get the video device and add it to the filter graph
if (deviceMoniker != null)
{
videoDeviceFilter = (IBaseFilter)Marshal.BindToMoniker(deviceMoniker);
hr = graphBuilder.AddFilter(videoDeviceFilter,
"Video Capture Device");
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
}
// create sample grabber, object and filter
grabberObj = Activator.CreateInstance(Type.GetTypeFromCLSID(Clsid.SampleGrabber, true));
grabberFilter = (IBaseFilter)grabberObj;
sg = (ISampleGrabber)grabberObj;
// add sample grabber filter to filter graph
hr = graphBuilder.AddFilter(grabberFilter, "grabber");
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
// Try looking for an video device interleaved media type
IBaseFilter testFilter = videoDeviceFilter;
// grabberFilter (not supported)
object o;
cat = DShowNET.PinCategory.Capture;
med = DShowNET.MediaType.Interleaved;
Guid iid = typeof(DShowNET.IAMStreamConfig).GUID;
hr = captureGraphBuilder.FindInterface(ref cat, ref med, (DShowNET.IBaseFilter)testFilter, ref iid, out o);
if (hr != 0)
{
// If not found, try looking for a video media type
med = MediaType.Video;
hr = captureGraphBuilder.FindInterface(
ref cat, ref med, (DShowNET.IBaseFilter)testFilter, ref iid, out o);
if (hr != 0)
{
o = null;
}
}
// Set the video stream configuration to data member
videoStreamConfig = o as DShowNET.IAMStreamConfig;
o = null;
//modifies the stream size and frame rate
if (modifyStream)
{
//set size of frame
BitmapInfoHeader bmiHeader;
bmiHeader = (BitmapInfoHeader)getStreamConfigSetting(videoStreamConfig, "BmiHeader");
bmiHeader.Width = streamSize.Width;
bmiHeader.Height = streamSize.Height;
setStreamConfigSetting(videoStreamConfig, "BmiHeader", bmiHeader);
//set frame rate (not supported on the cameras we have)
/*
* long avgTimePerFrame = (long)(10000000 / framerate);
* setStreamConfigSetting(videoStreamConfig, "AvgTimePerFrame", avgTimePerFrame);
*/
}
// connect pins (Turns on the video device)
if (graphBuilder.Connect((IPin)AForge.Video.DirectShow.Internals.Tools.GetOutPin((AForge.Video.DirectShow.Internals.IBaseFilter)videoDeviceFilter, 0), (IPin)AForge.Video.DirectShow.Internals.Tools.GetInPin((AForge.Video.DirectShow.Internals.IBaseFilter)grabberFilter, 0)) < 0)
{
throw new ApplicationException("Failed connecting filters");
}
// Set the sample grabber media type settings
AMMediaType mt = new AMMediaType();
mt.majorType = MediaType.Video;
mt.subType = MediaSubType.RGB24;
sg.SetMediaType(mt);
// get media type and set sample grabber parameters
if (sg.GetConnectedMediaType(mt) == 0)
{
VideoInfoHeader vih = (VideoInfoHeader)Marshal.PtrToStructure(mt.formatPtr, typeof(VideoInfoHeader));
if (vih.BmiHeader.Compression != 0)
{
YUYV = true;
grabber.setYUYV(YUYV);
}
grabber.Width = vih.BmiHeader.Width;
grabber.Height = vih.BmiHeader.Height;
//mt.Dispose();
}
// Set various sample grabber properties
sg.SetBufferSamples(false);
sg.SetOneShot(false);
sg.SetCallback(grabber, 1);
if (!preventFreezing)
{
// render
graphBuilder.Render((IPin)AForge.Video.DirectShow.Internals.Tools.GetOutPin((AForge.Video.DirectShow.Internals.IBaseFilter)grabberFilter, 0));
// Do not show active (source) window
IVideoWindow win = (IVideoWindow)graphObj;
win.put_AutoShow(0);
win = null;
}
// get media control
mc = (IMediaControl)graphBuilder;
// run
mc.Run();
while (!stopEvent.WaitOne(0, true))
{
Thread.Sleep(100);
}
mc.StopWhenReady();
}
// catch any exceptions
catch (Exception e)
{
// provide information to clients
if (VideoSourceError != null)
{
VideoSourceError(this, new VideoSourceErrorEventArgs(e.Message));
}
}
// finalization block
finally
{
// release all objects
mc = null;
graphBuilder = null;
captureGraphBuilder = null;
videoDeviceFilter = null;
grabberFilter = null;
sg = null;
if (graphObj != null)
{
Marshal.ReleaseComObject(graphObj);
graphObj = null;
}
if (grabberObj != null)
{
Marshal.ReleaseComObject(grabberObj);
grabberObj = null;
}
}
}
/// <summary>
/// Worker thread that captures the images
/// </summary>
private void RunWorker()
{
try
{
// Create the main graph
m_igrphbldGraph = Activator.CreateInstance(Type.GetTypeFromCLSID(FilterGraph)) as IGraphBuilder;
// Create the webcam source
m_sourceObject = FilterInfo.CreateFilter(m_sMonikerString);
// Create the grabber
m_isplGrabber = Activator.CreateInstance(Type.GetTypeFromCLSID(SampleGrabber)) as ISampleGrabber;
m_grabberObject = m_isplGrabber as IBaseFilter;
// Add the source and grabber to the main graph
m_igrphbldGraph.AddFilter(m_sourceObject, "source");
m_igrphbldGraph.AddFilter(m_grabberObject, "grabber");
using (AMMediaType mediaType = new AMMediaType())
{
mediaType.MajorType = MediaTypes.Video;
mediaType.SubType = MediaSubTypes.RGB32;
m_isplGrabber.SetMediaType(mediaType);
if (m_igrphbldGraph.Connect(m_sourceObject.GetPin(PinDirection.Output, 0), m_grabberObject.GetPin(PinDirection.Input, 0)) >= 0)
{
if (m_isplGrabber.GetConnectedMediaType(mediaType) == 0)
{
// During startup, this code can be too fast, so try at least 3 times
int retryCount = 0;
bool succeeded = false;
while ((retryCount < 3) && !succeeded)
{
// Tried again
retryCount++;
try
{
// Retrieve the grabber information
VideoInfoHeader header = (VideoInfoHeader)Marshal.PtrToStructure(mediaType.FormatPtr, typeof(VideoInfoHeader));
m_grbrCapGrabber.Width = header.BmiHeader.Width;
m_grbrCapGrabber.Height = header.BmiHeader.Height;
// Succeeded
succeeded = true;
}
catch (Exception retryException)
{
// Trace
Trace.TraceInformation("Failed to retrieve the grabber information, tried {0} time(s)", retryCount);
// Sleep
Thread.Sleep(50);
}
}
}
}
m_igrphbldGraph.Render(m_grabberObject.GetPin(PinDirection.Output, 0));
m_isplGrabber.SetBufferSamples(false);
m_isplGrabber.SetOneShot(false);
m_isplGrabber.SetCallback(m_grbrCapGrabber, 1);
// Get the video window
IVideoWindow wnd = (IVideoWindow)m_igrphbldGraph;
wnd.put_AutoShow(false);
wnd = null;
// Create the control and run
m_imedctrlControl = (IMediaControl)m_igrphbldGraph;
m_imedctrlControl.Run();
// Wait for the stop signal
while (!m_rstevStopSignal.WaitOne(0, true))
{
Thread.Sleep(10);
}
// Stop when ready
// _control.StopWhenReady();
m_imedctrlControl.Stop();
// Wait a bit... It apparently takes some time to stop IMediaControl
Thread.Sleep(1000);
}
}
catch (Exception ex)
{
// Trace
Trace.WriteLine(ex);
}
finally
{
// Clean up
this.Release();
}
}
private void upateVideoInfo(ISampleGrabber sampGrabber)
{
// Get the media type from the SampleGrabber
AMMediaType media = new AMMediaType();
int hr;
hr = sampGrabber.GetConnectedMediaType(media);
DsError.ThrowExceptionForHR(hr);
if ((media.formatType != FormatType.VideoInfo) || (media.formatPtr == IntPtr.Zero))
{
throw new NotSupportedException("Unknown Grabber Media Format");
}
// Grab the size info
this.m_video_info = (VideoInfoHeader)Marshal.PtrToStructure(media.formatPtr, typeof(VideoInfoHeader));
//pUnkを含むいくつかのフィールドは無効化される。
DsUtils.FreeAMMediaType(media);
this._capture_mediatype = media;
}
private void SaveSizeInfo(ISampleGrabber sampGrabber)
{
int hr;
// Get the media type from the SampleGrabber
AMMediaType media = new AMMediaType();
hr = sampGrabber.GetConnectedMediaType(media);
DsError.ThrowExceptionForHR(hr);
if ((media.formatType != FormatType.VideoInfo) || (media.formatPtr == IntPtr.Zero))
{
throw new NotSupportedException("Unknown Grabber Media Format");
}
// Grab the size info
VideoInfoHeader videoInfoHeader =
(VideoInfoHeader) Marshal.PtrToStructure(media.formatPtr, typeof (VideoInfoHeader));
m_videoWidth = videoInfoHeader.BmiHeader.Width;
m_videoHeight = videoInfoHeader.BmiHeader.Height;
m_stride = m_videoWidth*(videoInfoHeader.BmiHeader.BitCount/8);
m_avgtimeperframe = videoInfoHeader.AvgTimePerFrame;
DsUtils.FreeAMMediaType(media);
media = null;
}
private void GetSizeInfo(ISampleGrabber sampleGrabber)
{
// Get the media type from the SampleGrabber
AMMediaType media = new AMMediaType();
try {
DsError.ThrowExceptionForHR(sampleGrabber.GetConnectedMediaType(media));
if ((media.formatType != FormatType.VideoInfo) || (media.formatPtr == IntPtr.Zero)) {
throw new NotSupportedException(); //"Unknown Grabber Media Format");
}
VideoInfoHeader v = (VideoInfoHeader)Marshal.PtrToStructure(media.formatPtr, typeof(VideoInfoHeader));
m_configuration.Size = new Size(v.BmiHeader.Width, v.BmiHeader.Height);
m_configuration.BPP = v.BmiHeader.BitCount;
//m_configuration.MediaSubtype = media.subType;
} finally {
DsUtils.FreeAMMediaType(media);
media = null;
}
}