WebSVN - Projects - Blame - /MKLiveView/v1.0/Source/WebCamLib/WebCamLib.cpp

Rev	Author	Line No.	Line
2485	-	1	//*****************************************************************************************
		2	// File: WebCamLib.cpp
		3	// Project: WebcamLib
		4	// Author(s): John Conwell
		5	// Gary Caldwell
		6	//
		7	// Defines the webcam DirectShow wrapper used by TouchlessLib
		8	//*****************************************************************************************
		9
		10	#include <dshow.h>
		11	#include <strsafe.h>
		12	#define __IDxtCompositor_INTERFACE_DEFINED__
		13	#define __IDxtAlphaSetter_INTERFACE_DEFINED__
		14	#define __IDxtJpeg_INTERFACE_DEFINED__
		15	#define __IDxtKey_INTERFACE_DEFINED__
		16
		17	#pragma include_alias( "dxtrans.h", "qedit.h" )
		18
		19	#include "qedit.h"
		20	#include "WebCamLib.h"
		21
		22	using namespace System;
		23	using namespace System::Reflection;
		24	using namespace WebCamLib;
		25
		26
		27	// Private variables
		28	#define MAX_CAMERAS 10
		29
		30	#pragma region CameraInfo Items
		31	CameraInfo::CameraInfo( int index, String^ name )
		32	{
		33	Index = index;
		34	Name = name;
		35	}
		36
		37	int CameraInfo::Index::get()
		38	{
		39	return index;
		40	}
		41
		42	void CameraInfo::Index::set( int value )
		43	{
		44	index = value;
		45	}
		46
		47	String^ CameraInfo::Name::get()
		48	{
		49	return name;
		50	}
		51
		52	void CameraInfo::Name::set( String^ value )
		53	{
		54	if( value != nullptr )
		55	name = value;
		56	else
		57	throw gcnew ArgumentNullException( "Name cannot be null." );
		58	}
		59	#pragma endregion
		60
		61	#pragma region CameraPropertyCapabilities Items
		62	CameraPropertyCapabilities::CameraPropertyCapabilities( int cameraIndex, CameraProperty prop, bool isGetSupported, bool isSetSupported, bool isGetRangeSupported )
		63	{
		64	CameraIndex = cameraIndex;
		65	Property = prop;
		66	IsGetSupported = isGetSupported;
		67	IsSetSupported = isSetSupported;
		68	IsGetRangeSupported = isGetRangeSupported;
		69	}
		70
		71	int CameraPropertyCapabilities::CameraIndex::get()
		72	{
		73	return cameraIndex;
		74	}
		75
		76	void CameraPropertyCapabilities::CameraIndex::set( int value )
		77	{
		78	cameraIndex =value;
		79	}
		80
		81	CameraProperty CameraPropertyCapabilities::Property::get()
		82	{
		83	return prop;
		84	}
		85
		86	void CameraPropertyCapabilities::Property::set( CameraProperty value )
		87	{
		88	prop = value;
		89	}
		90
		91	bool CameraPropertyCapabilities::IsGetSupported::get()
		92	{
		93	return isGetSupported;
		94	}
		95
		96	void CameraPropertyCapabilities::IsGetSupported::set( bool value )
		97	{
		98	isGetSupported = value;
		99	}
		100
		101	bool CameraPropertyCapabilities::IsSetSupported::get()
		102	{
		103	return isSetSupported;
		104	}
		105
		106	void CameraPropertyCapabilities::IsSetSupported::set( bool value )
		107	{
		108	isSetSupported = value;
		109	}
		110
		111	bool CameraPropertyCapabilities::IsGetRangeSupported::get()
		112	{
		113	return isGetRangeSupported;
		114	}
		115
		116	void CameraPropertyCapabilities::IsGetRangeSupported::set( bool value )
		117	{
		118	isGetRangeSupported = value;
		119	}
		120
		121	bool CameraPropertyCapabilities::IsSupported::get()
		122	{
		123	return IsGetSupported \|\| IsSetSupported \|\| IsGetRangeSupported;
		124	}
		125
		126	bool CameraPropertyCapabilities::IsFullySupported::get()
		127	{
		128	return IsGetSupported && IsSetSupported && IsGetRangeSupported;
		129	}
		130	#pragma endregion
		131
		132	// Structure to hold camera information
		133	struct CameraInfoStruct
		134	{
		135	BSTR bstrName;
		136	IMoniker* pMoniker;
		137	};
		138
		139
		140	// Private global variables
		141	IGraphBuilder* g_pGraphBuilder = NULL;
		142	IMediaControl* g_pMediaControl = NULL;
		143	ICaptureGraphBuilder2* g_pCaptureGraphBuilder = NULL;
		144	IBaseFilter* g_pIBaseFilterCam = NULL;
		145	IBaseFilter* g_pIBaseFilterSampleGrabber = NULL;
		146	IBaseFilter* g_pIBaseFilterNullRenderer = NULL;
		147	CameraInfoStruct g_aCameraInfo[MAX_CAMERAS] = {0};
		148	IMediaSeeking *m_pMediaSeek = NULL;
		149
		150	// http://social.msdn.microsoft.com/Forums/sk/windowsdirectshowdevelopment/thread/052d6a15-f092-4913-b52d-d28f9a51e3b6
		151	void MyFreeMediaType(AM_MEDIA_TYPE& mt) {
		152	if (mt.cbFormat != 0) {
		153	CoTaskMemFree((PVOID)mt.pbFormat);
		154	mt.cbFormat = 0;
		155	mt.pbFormat = NULL;
		156	}
		157	if (mt.pUnk != NULL) {
		158	// Unecessary because pUnk should not be used, but safest.
		159	mt.pUnk->Release();
		160	mt.pUnk = NULL;
		161	}
		162	}
		163	void MyDeleteMediaType(AM_MEDIA_TYPE *pmt) {
		164	if (pmt != NULL) {
		165	MyFreeMediaType(*pmt); // See FreeMediaType for the implementation.
		166	CoTaskMemFree(pmt);
		167	}
		168	}
		169
		170
		171	/// <summary>
		172	/// Initializes information about all web cams connected to machine
		173	/// </summary>
		174	CameraMethods::CameraMethods()
		175	{
		176	// Set to not disposed
		177	this->disposed = false;
		178
		179	// Get and cache camera info
		180	RefreshCameraList();
		181	}
		182
		183	/// <summary>
		184	/// IDispose
		185	/// </summary>
		186	CameraMethods::~CameraMethods()
		187	{
		188	Cleanup();
		189	disposed = true;
		190	}
		191
		192	/// <summary>
		193	/// Finalizer
		194	/// </summary>
		195	CameraMethods::!CameraMethods()
		196	{
		197	if (!disposed)
		198	{
		199	Cleanup();
		200	}
		201	}
		202
		203	/// <summary>
		204	/// Initialize information about webcams installed on machine
		205	/// </summary>
		206	void CameraMethods::RefreshCameraList()
		207	{
		208	IEnumMoniker* pclassEnum = NULL;
		209	ICreateDevEnum* pdevEnum = NULL;
		210
		211	int count = 0;
		212
		213	CleanupCameraInfo();
		214
		215	HRESULT hr = CoCreateInstance(CLSID_SystemDeviceEnum,
		216	NULL,
		217	CLSCTX_INPROC,
		218	IID_ICreateDevEnum,
		219	(LPVOID*)&pdevEnum);
		220
		221	if (SUCCEEDED(hr))
		222	{
		223	hr = pdevEnum->CreateClassEnumerator(CLSID_VideoInputDeviceCategory, &pclassEnum, 0);
		224	}
		225
		226	if (pdevEnum != NULL)
		227	{
		228	pdevEnum->Release();
		229	pdevEnum = NULL;
		230	}
		231
		232	if (pclassEnum != NULL)
		233	{
		234	IMoniker* apIMoniker[1];
		235	ULONG ulCount = 0;
		236
		237	while (SUCCEEDED(hr) && (count) < MAX_CAMERAS && pclassEnum->Next(1, apIMoniker, &ulCount) == S_OK)
		238	{
		239	g_aCameraInfo[count].pMoniker = apIMoniker[0];
		240	g_aCameraInfo[count].pMoniker->AddRef();
		241
		242	IPropertyBag *pPropBag;
		243	hr = apIMoniker[0]->BindToStorage(NULL, NULL, IID_IPropertyBag, (void **)&pPropBag);
		244	if (SUCCEEDED(hr))
		245	{
		246	// Retrieve the filter's friendly name
		247	VARIANT varName;
		248	VariantInit(&varName);
		249	hr = pPropBag->Read(L"FriendlyName", &varName, 0);
		250	if (SUCCEEDED(hr) && varName.vt == VT_BSTR)
		251	{
		252	g_aCameraInfo[count].bstrName = SysAllocString(varName.bstrVal);
		253	}
		254	VariantClear(&varName);
		255
		256	pPropBag->Release();
		257	}
		258
		259	count++;
		260	}
		261
		262	pclassEnum->Release();
		263	}
		264
		265	this->Count = count;
		266
		267	if (!SUCCEEDED(hr))
		268	throw gcnew COMException("Error Refreshing Camera List", hr);
		269	}
		270
		271	/// <summary>
		272	/// Retrieve information about a specific camera
		273	/// Use the count property to determine valid indicies to pass in
		274	/// </summary>
		275	CameraInfo^ CameraMethods::GetCameraInfo(int camIndex)
		276	{
		277	if (camIndex >= Count)
		278	throw gcnew ArgumentOutOfRangeException("Camera index is out of bounds: " + Count.ToString());
		279
		280	if (g_aCameraInfo[camIndex].pMoniker == NULL)
		281	throw gcnew ArgumentException("There is no camera at index: " + camIndex.ToString());
		282
		283	CameraInfo^ camInfo = gcnew CameraInfo( camIndex, Marshal::PtrToStringBSTR((IntPtr)g_aCameraInfo[camIndex].bstrName) );
		284
		285	return camInfo;
		286	}
		287
		288	/// <summary>
		289	/// Start the camera associated with the input handle
		290	/// </summary>
		291	void CameraMethods::StartCamera(int camIndex, interior_ptr<int> width, interior_ptr<int> height, interior_ptr<int> bpp, interior_ptr<bool> successful)
		292	{
		293	*successful = StartCamera( camIndex, width, height, bpp );
		294	}
		295
		296	/// <summary>
		297	/// Start the camera associated with the input handle
		298	/// </summary>
		299	bool CameraMethods::StartCamera(int camIndex, interior_ptr<int> width, interior_ptr<int> height, interior_ptr<int> bpp)
		300	{
		301	if (camIndex >= Count)
		302	throw gcnew ArgumentException("Camera index is out of bounds: " + Count.ToString());
		303
		304	if (g_aCameraInfo[camIndex].pMoniker == NULL)
		305	throw gcnew ArgumentException("There is no camera at index: " + camIndex.ToString());
		306
		307	if (g_pGraphBuilder != NULL)
		308	throw gcnew ArgumentException("Graph Builder was null");
		309
		310	// Setup up function callback -- through evil reflection on private members
		311	Type^ baseType = this->GetType();
		312	FieldInfo^ field = baseType->GetField("<backing_store>OnImageCapture", BindingFlags::NonPublic \| BindingFlags::Instance \| BindingFlags::IgnoreCase);
		313	if (field != nullptr)
		314	{
		315	Object^ obj = field->GetValue(this);
		316	if (obj != nullptr)
		317	{
		318	CameraMethods::CaptureCallbackDelegate^ del = (CameraMethods::CaptureCallbackDelegate^)field->GetValue(this);
		319	if (del != nullptr)
		320	{
		321	ppCaptureCallback = GCHandle::Alloc(del);
		322	g_pfnCaptureCallback =
		323	static_cast<PFN_CaptureCallback>(Marshal::GetFunctionPointerForDelegate(del).ToPointer());
		324	}
		325	}
		326	}
		327
		328	bool result = false;
		329
		330	IMoniker *pMoniker = g_aCameraInfo[camIndex].pMoniker;
		331	pMoniker->AddRef();
		332
		333	HRESULT hr = S_OK;
		334
		335	// Build all the necessary interfaces to start the capture
		336	if (SUCCEEDED(hr))
		337	{
		338	hr = CoCreateInstance(CLSID_FilterGraph,
		339	NULL,
		340	CLSCTX_INPROC,
		341	IID_IGraphBuilder,
		342	(LPVOID*)&g_pGraphBuilder);
		343	}
		344
		345	if (SUCCEEDED(hr))
		346	{
		347	hr = g_pGraphBuilder->QueryInterface(IID_IMediaControl, (LPVOID*)&g_pMediaControl);
		348	}
		349
		350	if (SUCCEEDED(hr))
		351	{
		352	hr = CoCreateInstance(CLSID_CaptureGraphBuilder2,
		353	NULL,
		354	CLSCTX_INPROC,
		355	IID_ICaptureGraphBuilder2,
		356	(LPVOID*)&g_pCaptureGraphBuilder);
		357	}
		358
		359	// Setup the filter graph
		360	if (SUCCEEDED(hr))
		361	{
		362	hr = g_pCaptureGraphBuilder->SetFiltergraph(g_pGraphBuilder);
		363	}
		364
		365	// Build the camera from the moniker
		366	if (SUCCEEDED(hr))
		367	{
		368	hr = pMoniker->BindToObject(NULL, NULL, IID_IBaseFilter, (LPVOID*)&g_pIBaseFilterCam);
		369	}
		370
		371	// Add the camera to the filter graph
		372	if (SUCCEEDED(hr))
		373	{
		374	hr = g_pGraphBuilder->AddFilter(g_pIBaseFilterCam, L"WebCam");
		375	}
		376
		377	// Set the resolution
		378	if (SUCCEEDED(hr)) {
		379	hr = SetCaptureFormat(g_pIBaseFilterCam, width, height, *bpp);
		380	}
		381
		382	// Create a SampleGrabber
		383	if (SUCCEEDED(hr))
		384	{
		385	hr = CoCreateInstance(CLSID_SampleGrabber, NULL, CLSCTX_INPROC_SERVER, IID_IBaseFilter, (void**)&g_pIBaseFilterSampleGrabber);
		386	}
		387
		388	// Configure the Sample Grabber
		389	if (SUCCEEDED(hr))
		390	{
		391	hr = ConfigureSampleGrabber(g_pIBaseFilterSampleGrabber);
		392	}
		393
		394	// Add Sample Grabber to the filter graph
		395	if (SUCCEEDED(hr))
		396	{
		397	hr = g_pGraphBuilder->AddFilter(g_pIBaseFilterSampleGrabber, L"SampleGrabber");
		398	}
		399
		400	// Create the NullRender
		401	if (SUCCEEDED(hr))
		402	{
		403	hr = CoCreateInstance(CLSID_NullRenderer, NULL, CLSCTX_INPROC_SERVER, IID_IBaseFilter, (void**)&g_pIBaseFilterNullRenderer);
		404	}
		405
		406	// Add the Null Render to the filter graph
		407	if (SUCCEEDED(hr))
		408	{
		409	hr = g_pGraphBuilder->AddFilter(g_pIBaseFilterNullRenderer, L"NullRenderer");
		410	}
		411
		412	// Configure the render stream
		413	if (SUCCEEDED(hr))
		414	{
		415	hr = g_pCaptureGraphBuilder->RenderStream(&PIN_CATEGORY_CAPTURE, &MEDIATYPE_Video, g_pIBaseFilterCam, g_pIBaseFilterSampleGrabber, g_pIBaseFilterNullRenderer);
		416	}
		417
		418	// Grab the capture width and height
		419	if (SUCCEEDED(hr))
		420	{
		421	ISampleGrabber* pGrabber = NULL;
		422	hr = g_pIBaseFilterSampleGrabber->QueryInterface(IID_ISampleGrabber, (LPVOID*)&pGrabber);
		423	if (SUCCEEDED(hr))
		424	{
		425	AM_MEDIA_TYPE mt;
		426	hr = pGrabber->GetConnectedMediaType(&mt);
		427	if (SUCCEEDED(hr))
		428	{
		429	VIDEOINFOHEADER *pVih;
		430	if ((mt.formattype == FORMAT_VideoInfo) &&
		431	(mt.cbFormat >= sizeof(VIDEOINFOHEADER)) &&
		432	(mt.pbFormat != NULL) )
		433	{
		434	pVih = (VIDEOINFOHEADER*)mt.pbFormat;
		435	*width = pVih->bmiHeader.biWidth;
		436	*height = pVih->bmiHeader.biHeight;
		437	*bpp = pVih->bmiHeader.biBitCount;
		438	}
		439	else
		440	{
		441	hr = E_FAIL; // Wrong format
		442	}
		443
		444	// FreeMediaType(mt); (from MSDN)
		445	if (mt.cbFormat != 0)
		446	{
		447	CoTaskMemFree((PVOID)mt.pbFormat);
		448	mt.cbFormat = 0;
		449	mt.pbFormat = NULL;
		450	}
		451	if (mt.pUnk != NULL)
		452	{
		453	// Unecessary because pUnk should not be used, but safest.
		454	mt.pUnk->Release();
		455	mt.pUnk = NULL;
		456	}
		457	}
		458	}
		459
		460	if (pGrabber != NULL)
		461	{
		462	pGrabber->Release();
		463	pGrabber = NULL;
		464	}
		465	}
		466
		467	// Start the capture
		468	if (SUCCEEDED(hr))
		469	{
		470	hr = g_pMediaControl->Run();
		471	}
		472
		473	// If init fails then ensure that you cleanup
		474	if (FAILED(hr))
		475	{
		476	StopCamera();
		477	}
		478	else
		479	{
		480	hr = S_OK; // Make sure we return S_OK for success
		481	}
		482
		483	// Cleanup
		484	if (pMoniker != NULL)
		485	{
		486	pMoniker->Release();
		487	pMoniker = NULL;
		488	}
		489
		490	if( result = SUCCEEDED( hr ) )
		491	this->activeCameraIndex = camIndex;
		492
		493	return result;
		494	}
		495
		496	#pragma region Camera Property Support
		497	inline void CameraMethods::IsPropertySupported( CameraProperty prop, interior_ptr<bool> result )
		498	{
		499	*result = IsPropertySupported( prop );
		500	}
		501
		502	inline bool CameraMethods::IsPropertySupported( CameraProperty prop )
		503	{
		504	bool result = false;
		505
		506	if( IsCameraControlProperty( prop ) )
		507	result = IsPropertySupported( GetCameraControlProperty( prop ) );
		508	else if( IsVideoProcAmpProperty( prop ) )
		509	result = IsPropertySupported( GetVideoProcAmpProperty( prop ) );
		510
		511	return result;
		512	}
		513
		514	bool CameraMethods::IsPropertySupported( WebCamLib::CameraControlProperty prop )
		515	{
		516	bool result = false;
		517
		518	IAMCameraControl * cameraControl = NULL;
		519	HRESULT hr = g_pIBaseFilterCam->QueryInterface(IID_IAMCameraControl, (void**)&cameraControl);
		520
		521	if(SUCCEEDED(hr))
		522	{
		523	long lProperty = static_cast< long >( prop );
		524	long value, captureFlags;
		525	hr = cameraControl->Get(lProperty, &value, &captureFlags);
		526
		527	result = SUCCEEDED(hr);
		528	}
		529	//else
		530	// throw gcnew InvalidOperationException( "Unable to determine if the property is supported." );
		531
		532	return result;
		533	}
		534
		535	bool CameraMethods::IsPropertySupported( WebCamLib::VideoProcAmpProperty prop )
		536	{
		537	bool result = false;
		538
		539	IAMVideoProcAmp * pProcAmp = NULL;
		540	HRESULT hr = g_pIBaseFilterCam->QueryInterface(IID_IAMVideoProcAmp, (void**)&pProcAmp);
		541
		542	if(SUCCEEDED(hr))
		543	{
		544	long lProperty = static_cast< long >( prop );
		545	long value, captureFlags;
		546	hr = pProcAmp->Get(lProperty, &value, &captureFlags);
		547
		548	result = SUCCEEDED(hr);
		549	}
		550	else
		551	throw gcnew InvalidOperationException( "Unable to determine if the property is supported." );
		552
		553	return result;
		554	}
		555
		556	inline bool CameraMethods::IsCameraControlProperty( CameraProperty prop )
		557	{
		558	return IsPropertyMaskEqual( prop, PropertyTypeMask::CameraControlPropertyMask );
		559	}
		560
		561	inline bool CameraMethods::IsVideoProcAmpProperty( CameraProperty prop )
		562	{
		563	return IsPropertyMaskEqual( prop, PropertyTypeMask::VideoProcAmpPropertyMask );
		564	}
		565
		566	inline bool CameraMethods::IsPropertyMaskEqual( CameraProperty prop, PropertyTypeMask mask )
		567	{
		568	return ( static_cast< int >( prop ) & static_cast< int >( mask ) ) != 0;
		569	}
		570
		571	inline void CameraMethods::GetProperty( CameraProperty prop, bool isValue, interior_ptr<long> value, interior_ptr<bool> bAuto, interior_ptr<bool> successful )
		572	{
		573	*successful = GetProperty( prop, isValue, value, bAuto );
		574	}
		575
		576	inline bool CameraMethods::GetProperty( CameraProperty prop, bool isValue, interior_ptr<long> value, interior_ptr<bool> bAuto )
		577	{
		578	bool result;
		579
		580	if( isValue )
		581	result = GetProperty_value( prop, value, bAuto );
		582	else // is a percentage value
		583	result = GetProperty_percentage( prop, value, bAuto );
		584
		585	return result;
		586	}
		587
		588	inline WebCamLib::CameraControlProperty CameraMethods::GetCameraControlProperty( CameraProperty prop )
		589	{
		590	if( IsCameraControlProperty( prop ) )
		591	{
		592	int value = static_cast< int >( prop );
		593	int mask = static_cast< int >( PropertyTypeMask::CameraControlPropertyMask );
		594	value &= ~mask;
		595
		596	return static_cast< WebCamLib::CameraControlProperty >( value );
		597	}
		598	else
		599	throw gcnew OverflowException( "Property is not a camera property." );
		600	}
		601
		602	inline WebCamLib::VideoProcAmpProperty CameraMethods::GetVideoProcAmpProperty( CameraProperty prop )
		603	{
		604	if( IsVideoProcAmpProperty( prop ) )
		605	{
		606	int value = static_cast< int >( prop );
		607	int mask = static_cast< int >( PropertyTypeMask::VideoProcAmpPropertyMask );
		608	value &= ~mask;
		609
		610	return static_cast< WebCamLib::VideoProcAmpProperty >( value );
		611	}
		612	else
		613	throw gcnew OverflowException( "Property is not a camera property." );
		614	}
		615
		616	inline void CameraMethods::GetProperty_value( CameraProperty prop, interior_ptr<long> value, interior_ptr<bool> bAuto, interior_ptr<bool> successful)
		617	{
		618	*successful = GetProperty_value( prop, value, bAuto );
		619	}
		620
		621	inline bool CameraMethods::GetProperty_value( CameraProperty prop, interior_ptr<long> value, interior_ptr<bool> bAuto)
		622	{
		623	bool result = false;
		624
		625	if( IsCameraControlProperty( prop ) )
		626	result = GetProperty_value( GetCameraControlProperty( prop ), value, bAuto );
		627	else if( IsVideoProcAmpProperty( prop ) )
		628	result = GetProperty_value( GetVideoProcAmpProperty( prop ), value, bAuto );
		629
		630	return result;
		631	}
		632
		633	inline void CameraMethods::GetProperty_percentage( CameraProperty prop, interior_ptr<long> percentage, interior_ptr<bool> bAuto, interior_ptr<bool> successful)
		634	{
		635	*successful = GetProperty_percentage( prop, percentage, bAuto );
		636	}
		637
		638	bool CameraMethods::GetProperty_percentage( CameraProperty prop, interior_ptr<long> percentage, interior_ptr<bool> bAuto)
		639	{
		640	bool result;
		641
		642	long value;
		643	if( result = GetProperty_value( prop, &value, bAuto ) )
		644	{
		645	long min, max, steppingDelta, defaults;
		646	bool placeHolder;
		647	if( result = GetPropertyRange( prop, &min, &max, &steppingDelta, &defaults, &placeHolder ) )
		648	percentage = ( ( value - min ) 100 ) / ( max - min + 1 );
		649	}
		650
		651	return result;
		652	}
		653
		654	inline void CameraMethods::SetProperty( CameraProperty prop, bool isValue, long value, bool bAuto, interior_ptr<bool> successful )
		655	{
		656	*successful = SetProperty( prop, isValue, value, bAuto );
		657	}
		658
		659	inline bool CameraMethods::SetProperty( CameraProperty prop, bool isValue, long value, bool bAuto )
		660	{
		661	bool result;
		662
		663	if( isValue )
		664	result = SetProperty_value( prop, value, bAuto );
		665	else // is a percentage value
		666	result = SetProperty_percentage( prop, value, bAuto );
		667
		668	return result;
		669	}
		670
		671	inline void CameraMethods::SetProperty_value(CameraProperty prop, long value, bool bAuto, interior_ptr<bool> successful)
		672	{
		673	*successful = SetProperty_value( prop, value, bAuto );
		674	}
		675
		676	inline bool CameraMethods::SetProperty_value(CameraProperty prop, long value, bool bAuto)
		677	{
		678	return SetProperty_value( prop, value, bAuto, true );
		679	}
		680
		681	inline void CameraMethods::SetProperty_value( CameraProperty prop, long value, bool bAuto, bool throwValidationError, interior_ptr<bool> successful )
		682	{
		683	*successful = SetProperty_value( prop, value, bAuto, throwValidationError );
		684	}
		685
		686	inline bool CameraMethods::SetProperty_value( CameraProperty prop, long value, bool bAuto, bool throwValidationError )
		687	{
		688	bool result = false;
		689
		690	if( ValidatePropertyValue( prop, value ) )
		691	{
		692	if( IsCameraControlProperty( prop ) )
		693	result = SetProperty_value( GetCameraControlProperty( prop ), value, bAuto );
		694	else if( IsVideoProcAmpProperty( prop ) )
		695	result = SetProperty_value( GetVideoProcAmpProperty( prop ), value, bAuto );
		696	}
		697	else if( throwValidationError )
		698	throw gcnew ArgumentOutOfRangeException( "Property value is outside of its defined range." );
		699
		700	return result;
		701	}
		702
		703	inline void CameraMethods::SetProperty_percentage(CameraProperty prop, long percentage, bool bAuto, interior_ptr<bool> successful)
		704	{
		705	*successful = SetProperty_percentage( prop, percentage, bAuto );
		706	}
		707
		708	bool CameraMethods::SetProperty_percentage(CameraProperty prop, long percentage, bool bAuto)
		709	{
		710	if( !IsPropertySupported( prop ) )
		711	throw gcnew ArgumentException( "Property is not supported." );
		712	else if( percentage >= 0 && percentage <= 100 )
		713	{
		714	bool result;
		715
		716	long min, max, steppingDelta, defaults;
		717	bool placeHolder;
		718	if( result = GetPropertyRange( prop, &min, &max, &steppingDelta, &defaults, &placeHolder ) )
		719	{
		720	long value = ( ( max - min ) * percentage ) / 100 + min;
		721	result = SetProperty_value( prop, value, bAuto );
		722	}
		723
		724	return result;
		725	}
		726	else
		727	throw gcnew ArgumentOutOfRangeException( "Percentage is not valid." );
		728	}
		729
		730	inline void CameraMethods::GetPropertyRange( CameraProperty prop, interior_ptr<long> min, interior_ptr<long> max, interior_ptr<long> steppingDelta, interior_ptr<long> defaults, interior_ptr<bool> bAuto, interior_ptr<bool> successful)
		731	{
		732	*successful = GetPropertyRange( prop, min, max, steppingDelta, defaults, bAuto );
		733	}
		734
		735	inline bool CameraMethods::GetPropertyRange( CameraProperty prop, interior_ptr<long> min, interior_ptr<long> max, interior_ptr<long> steppingDelta, interior_ptr<long> defaults, interior_ptr<bool> bAuto)
		736	{
		737	bool result = false;
		738
		739	if( IsCameraControlProperty( prop ) )
		740	result = GetPropertyRange( GetCameraControlProperty( prop ), min, max, steppingDelta, defaults, bAuto );
		741	else if( IsVideoProcAmpProperty( prop ) )
		742	result = GetPropertyRange( GetVideoProcAmpProperty( prop ), min, max, steppingDelta, defaults, bAuto );
		743
		744	return result;
		745	}
		746
		747	bool CameraMethods::GetPropertyRange( WebCamLib::CameraControlProperty prop, interior_ptr<long> min, interior_ptr<long> max, interior_ptr<long> steppingDelta, interior_ptr<long> defaults, interior_ptr<bool> bAuto )
		748	{
		749	bool result = false;
		750
		751	IAMCameraControl * cameraControl = NULL;
		752	HRESULT hr = g_pIBaseFilterCam->QueryInterface(IID_IAMCameraControl, (void**)&cameraControl);
		753
		754	if( SUCCEEDED( hr ) )
		755	{
		756	long lProperty = static_cast< long >( prop );
		757	long minimum, maximum, step, default_value, flags;
		758	hr = cameraControl->GetRange( lProperty, &minimum, &maximum, &step, &default_value, &flags );
		759
		760	if( SUCCEEDED( hr ) )
		761	{
		762	*min = minimum;
		763	*max = maximum;
		764	*steppingDelta = step;
		765	*defaults = default_value;
		766	*bAuto = flags == CameraControl_Flags_Auto;
		767
		768	result = SUCCEEDED(hr);
		769	}
		770	}
		771
		772	return result;
		773	}
		774
		775	bool CameraMethods::GetPropertyRange( WebCamLib::VideoProcAmpProperty prop, interior_ptr<long> min, interior_ptr<long> max, interior_ptr<long> steppingDelta, interior_ptr<long> defaults, interior_ptr<bool> bAuto )
		776	{
		777	bool result = false;
		778
		779	IAMVideoProcAmp * pProcAmp = NULL;
		780	HRESULT hr = g_pIBaseFilterCam->QueryInterface(IID_IAMVideoProcAmp, (void**)&pProcAmp);
		781
		782	if( SUCCEEDED( hr ) )
		783	{
		784	long lProperty = static_cast< long >( prop );
		785	long minimum, maximum, step, default_value, flags;
		786	hr = pProcAmp->GetRange( lProperty, &minimum, &maximum, &step, &default_value, &flags );
		787
		788	if( SUCCEEDED( hr ) )
		789	{
		790	*min = minimum;
		791	*max = maximum;
		792	*steppingDelta = step;
		793	*defaults = default_value;
		794	*bAuto = flags == CameraControl_Flags_Auto;
		795
		796	result = SUCCEEDED(hr);
		797	}
		798	}
		799
		800	return result;
		801	}
		802
		803	bool CameraMethods::GetProperty_value( WebCamLib::CameraControlProperty prop, interior_ptr<long> value, interior_ptr<bool> bAuto )
		804	{
		805	if( g_pIBaseFilterCam == NULL )
		806	throw gcnew InvalidOperationException( "No camera started." );
		807
		808	bool result = false;
		809
		810	IAMCameraControl * cameraControl = NULL;
		811	HRESULT hr = g_pIBaseFilterCam->QueryInterface(IID_IAMCameraControl, (void**)&cameraControl);
		812
		813	if( SUCCEEDED( hr ) )
		814	{
		815	long lProperty = static_cast< long >( prop );
		816	long lValue, captureFlags;
		817	hr = cameraControl->Get(lProperty, &lValue, &captureFlags);
		818
		819	if( result = SUCCEEDED( hr ) )
		820	{
		821	*value = lValue;
		822	*bAuto = captureFlags == CameraControl_Flags_Auto;
		823	}
		824	}
		825
		826	return result;
		827	}
		828
		829	bool CameraMethods::GetProperty_value( WebCamLib::VideoProcAmpProperty prop, interior_ptr<long> value, interior_ptr<bool> bAuto )
		830	{
		831	if( g_pIBaseFilterCam == NULL )
		832	throw gcnew InvalidOperationException( "No camera started." );
		833
		834	bool result = false;
		835
		836	IAMVideoProcAmp * pProcAmp = NULL;
		837	HRESULT hr = g_pIBaseFilterCam->QueryInterface(IID_IAMVideoProcAmp, (void**)&pProcAmp);
		838
		839	if( SUCCEEDED( hr ) )
		840	{
		841	long lProperty = static_cast< long >( prop );
		842	long lValue, captureFlags;
		843	hr = pProcAmp->Get(lProperty, &lValue, &captureFlags);
		844
		845	if( result = SUCCEEDED( hr ) )
		846	{
		847	*value = lValue;
		848	*bAuto = captureFlags == VideoProcAmp_Flags_Auto;
		849	}
		850	}
		851
		852	return result;
		853	}
		854
		855	bool CameraMethods::SetProperty_value( WebCamLib::CameraControlProperty prop, long value, bool bAuto )
		856	{
		857	if( g_pIBaseFilterCam == NULL )
		858	throw gcnew InvalidOperationException( "No camera started." );
		859
		860	bool result = false;
		861
		862	// Query the capture filter for the IAMCameraControl interface.
		863	IAMCameraControl * cameraControl = NULL;
		864	HRESULT hr = g_pIBaseFilterCam->QueryInterface(IID_IAMCameraControl, (void**)&cameraControl);
		865
		866	if( SUCCEEDED( hr ) )
		867	{
		868	long lProperty = static_cast< long >( prop );
		869	hr = cameraControl->Set(lProperty, value, bAuto ? CameraControl_Flags_Auto : CameraControl_Flags_Manual);
		870
		871	result = SUCCEEDED( hr );
		872	}
		873
		874	return result;
		875	}
		876
		877	bool CameraMethods::SetProperty_value( WebCamLib::VideoProcAmpProperty prop, long value, bool bAuto )
		878	{
		879	if( g_pIBaseFilterCam == NULL )
		880	throw gcnew InvalidOperationException( "No camera started." );
		881
		882	bool result = false;
		883
		884	// Query the capture filter for the IAMVideoProcAmp interface.
		885	IAMVideoProcAmp * pProcAmp = NULL;
		886	HRESULT hr = g_pIBaseFilterCam->QueryInterface(IID_IAMVideoProcAmp, (void**)&pProcAmp);
		887
		888	if( SUCCEEDED( hr ) )
		889	{
		890	long lProperty = static_cast< long >( prop );
		891	hr = pProcAmp->Set(lProperty, value, bAuto ? VideoProcAmp_Flags_Auto : VideoProcAmp_Flags_Manual);
		892
		893	result = SUCCEEDED( hr );
		894	}
		895
		896	return result;
		897	}
		898
		899	void CameraMethods::PropertyHasRange( CameraProperty prop, interior_ptr<bool> successful )
		900	{
		901	*successful = PropertyHasRange( prop );
		902	}
		903
		904	bool CameraMethods::PropertyHasRange( CameraProperty prop )
		905	{
		906	bool result = prop != CameraProperty::WhiteBalance && prop != CameraProperty::Gain;
		907
		908	return result;
		909	}
		910
		911	inline void CameraMethods::ValidatePropertyValue( CameraProperty prop, long value, interior_ptr<bool> successful )
		912	{
		913	*successful = ValidatePropertyValue( prop, value );
		914	}
		915
		916	bool CameraMethods::ValidatePropertyValue( CameraProperty prop, long value )
		917	{
		918	bool result = true;
		919
		920	if( PropertyHasRange( prop ) )
		921	{
		922	long min, max, steppingDelta, defaults;
		923	bool bAuto;
		924	GetPropertyRange( prop, &min, &max, &steppingDelta, &defaults, &bAuto );
		925
		926	result = value >= min && value <= max;
		927	}
		928
		929	return result;
		930	}
		931
		932	CameraPropertyCapabilities^ CameraMethods::GetPropertyCapability( CameraProperty prop )
		933	{
		934	long value;
		935	bool isAuto;
		936
		937	bool propertyHasRange = PropertyHasRange( prop );
		938	bool isSetSupported;
		939	bool isGetSupported = GetProperty_value( prop, &value, &isAuto );
		940	if( isGetSupported )
		941	isSetSupported = SetProperty_value( prop, value, isAuto );
		942	else
		943	isSetSupported = false;
		944
		945	CameraPropertyCapabilities^ result = gcnew CameraPropertyCapabilities( ActiveCameraIndex, prop, isGetSupported, isSetSupported, propertyHasRange );
		946
		947	return result;
		948	}
		949
		950	IDictionary<CameraProperty, CameraPropertyCapabilities^> ^ CameraMethods::PropertyCapabilities::get()
		951	{
		952	Array^ propertyValues = Enum::GetValues( CameraProperty::typeid );
		953
		954	IDictionary<CameraProperty, CameraPropertyCapabilities^> ^ result = gcnew Dictionary<CameraProperty, CameraPropertyCapabilities^>( propertyValues->Length );
		955
		956	for( Int32 i = 0; i < propertyValues->Length; ++i )
		957	{
		958	CameraProperty prop = static_cast<CameraProperty>( propertyValues->GetValue( i ) );
		959	result->Add( prop, GetPropertyCapability( prop ) );
		960	}
		961
		962	return result;
		963	}
		964	#pragma endregion
		965
		966	/// <summary>
		967	/// Closes any open webcam and releases all unmanaged resources
		968	/// </summary>
		969	void CameraMethods::Cleanup()
		970	{
		971	StopCamera();
		972	CleanupCameraInfo();
		973
		974	// Clean up pinned pointer to callback delegate
		975	if (ppCaptureCallback.IsAllocated)
		976	{
		977	ppCaptureCallback.Free();
		978	}
		979	}
		980
		981	/// <summary>
		982	/// Stops the current open webcam
		983	/// </summary>
		984	void CameraMethods::StopCamera()
		985	{
		986	//HRESULT hr = g_pGraphBuilder->QueryInterface(IID_IMediaSeeking, (void**)&m_pMediaSeek);
		987
		988	g_pfnCaptureCallback = NULL;
		989
		990	if (g_pIBaseFilterNullRenderer != NULL)
		991	{
		992	g_pIBaseFilterNullRenderer->Release();
		993	g_pIBaseFilterNullRenderer = NULL;
		994	}
		995
		996	if (g_pIBaseFilterSampleGrabber != NULL)
		997	{
		998	g_pIBaseFilterSampleGrabber->Release();
		999	g_pIBaseFilterSampleGrabber = NULL;
		1000	}
		1001
		1002	if (g_pIBaseFilterCam != NULL)
		1003	{
		1004	g_pIBaseFilterCam->Release();
		1005	g_pIBaseFilterCam = NULL;
		1006	}
		1007
		1008	if (g_pGraphBuilder != NULL)
		1009	{
		1010	g_pGraphBuilder->Release();
		1011	g_pGraphBuilder = NULL;
		1012	}
		1013
		1014	if (g_pCaptureGraphBuilder != NULL)
		1015	{
		1016	g_pCaptureGraphBuilder->Release();
		1017	g_pCaptureGraphBuilder = NULL;
		1018	}
		1019	if (g_pMediaControl != NULL)
		1020	{
		1021
		1022	g_pMediaControl->Pause();
		1023	//try
		1024	//{
		1025	g_pMediaControl->GetState(1000, NULL);
		1026
		1027	// long long m_pStart = 0;
		1028	// if (m_pMediaSeek != NULL)
		1029	// {
		1030	// m_pMediaSeek->SetPositions(&m_pStart, AM_SEEKING_AbsolutePositioning, NULL, AM_SEEKING_NoPositioning);
		1031	// }
		1032	//// g_pMediaControl->Run();
		1033	// hr = g_pMediaControl->GetState(1000, NULL);
		1034	g_pMediaControl->Stop();
		1035	// g_pMediaControl->GetState(1000, NULL);
		1036
		1037	//}
		1038	//catch (const int e)
		1039	//{
		1040
		1041	//}
		1042	//finally
		1043	{
		1044	g_pMediaControl->Release();
		1045	g_pMediaControl = NULL;
		1046	}
		1047	}
		1048
		1049
		1050	this->activeCameraIndex = -1;
		1051	}
		1052
		1053	/// <summary>
		1054	/// Show the properties dialog for the specified webcam
		1055	/// </summary>
		1056	void CameraMethods::DisplayCameraPropertiesDialog(int camIndex)
		1057	{
		1058	if (camIndex >= Count)
		1059	throw gcnew ArgumentException("Camera index is out of bounds: " + Count.ToString());
		1060
		1061	if (g_aCameraInfo[camIndex].pMoniker == NULL)
		1062	throw gcnew ArgumentException("There is no camera at index: " + camIndex.ToString());
		1063
		1064	HRESULT hr = S_OK;
		1065	IBaseFilter *pFilter = NULL;
		1066	ISpecifyPropertyPages *pProp = NULL;
		1067	IMoniker *pMoniker = g_aCameraInfo[camIndex].pMoniker;
		1068	pMoniker->AddRef();
		1069
		1070	// Create a filter graph for the moniker
		1071	if (SUCCEEDED(hr))
		1072	{
		1073	hr = pMoniker->BindToObject(NULL, NULL, IID_IBaseFilter, (LPVOID*)&pFilter);
		1074	}
		1075
		1076	// See if it implements a property page
		1077	if (SUCCEEDED(hr))
		1078	{
		1079	hr = pFilter->QueryInterface(IID_ISpecifyPropertyPages, (LPVOID*)&pProp);
		1080	}
		1081
		1082	// Show the property page
		1083	if (SUCCEEDED(hr))
		1084	{
		1085	FILTER_INFO filterinfo;
		1086	hr = pFilter->QueryFilterInfo(&filterinfo);
		1087
		1088	IUnknown *pFilterUnk = NULL;
		1089	if (SUCCEEDED(hr))
		1090	{
		1091	hr = pFilter->QueryInterface(IID_IUnknown, (LPVOID*)&pFilterUnk);
		1092	}
		1093
		1094	if (SUCCEEDED(hr))
		1095	{
		1096	CAUUID caGUID;
		1097	pProp->GetPages(&caGUID);
		1098
		1099	OleCreatePropertyFrame(
		1100	NULL, // Parent window
		1101	0, 0, // Reserved
		1102	filterinfo.achName, // Caption for the dialog box
		1103	1, // Number of objects (just the filter)
		1104	&pFilterUnk, // Array of object pointers.
		1105	caGUID.cElems, // Number of property pages
		1106	caGUID.pElems, // Array of property page CLSIDs
		1107	0, // Locale identifier
		1108	0, NULL // Reserved
		1109	);
		1110	}
		1111
		1112	if (pFilterUnk != NULL)
		1113	{
		1114	pFilterUnk->Release();
		1115	pFilterUnk = NULL;
		1116	}
		1117	}
		1118
		1119	if (pProp != NULL)
		1120	{
		1121	pProp->Release();
		1122	pProp = NULL;
		1123	}
		1124
		1125	if (pMoniker != NULL)
		1126	{
		1127	pMoniker->Release();
		1128	pMoniker = NULL;
		1129	}
		1130
		1131	if (pFilter != NULL)
		1132	{
		1133	pFilter->Release();
		1134	pFilter = NULL;
		1135	}
		1136
		1137	//if (!SUCCEEDED(hr))
		1138	// throw gcnew COMException("Error displaying camera properties dialog", hr);
		1139	}
		1140
		1141	/// <summary>
		1142	/// Releases all unmanaged resources
		1143	/// </summary>
		1144	void CameraMethods::CleanupCameraInfo()
		1145	{
		1146	for (int n = 0; n < MAX_CAMERAS; n++)
		1147	{
		1148	SysFreeString(g_aCameraInfo[n].bstrName);
		1149	g_aCameraInfo[n].bstrName = NULL;
		1150	if (g_aCameraInfo[n].pMoniker != NULL)
		1151	{
		1152	g_aCameraInfo[n].pMoniker->Release();
		1153	g_aCameraInfo[n].pMoniker = NULL;
		1154	}
		1155	}
		1156	}
		1157
		1158
		1159	/// <summary>
		1160	/// Setup the callback functionality for DirectShow
		1161	/// </summary>
		1162	HRESULT CameraMethods::ConfigureSampleGrabber(IBaseFilter *pIBaseFilter)
		1163	{
		1164	HRESULT hr = S_OK;
		1165
		1166	ISampleGrabber *pGrabber = NULL;
		1167
		1168	hr = pIBaseFilter->QueryInterface(IID_ISampleGrabber, (void**)&pGrabber);
		1169	if (SUCCEEDED(hr))
		1170	{
		1171	AM_MEDIA_TYPE mt;
		1172	ZeroMemory(&mt, sizeof(AM_MEDIA_TYPE));
		1173	mt.majortype = MEDIATYPE_Video;
		1174	mt.subtype = MEDIASUBTYPE_RGB24;
		1175	mt.formattype = FORMAT_VideoInfo;
		1176	hr = pGrabber->SetMediaType(&mt);
		1177	}
		1178
		1179	if (SUCCEEDED(hr))
		1180	{
		1181	hr = pGrabber->SetCallback(new SampleGrabberCB(), 1);
		1182	}
		1183
		1184	if (pGrabber != NULL)
		1185	{
		1186	pGrabber->Release();
		1187	pGrabber = NULL;
		1188	}
		1189
		1190	return hr;
		1191	}
		1192
		1193	void CameraMethods::GetCaptureSizes(int index, IList<Tuple<int,int,int>^> ^ sizes)
		1194	{
		1195	sizes->Clear();
		1196
		1197	HRESULT hr = S_OK;
		1198
		1199	if (index >= Count)
		1200	throw gcnew ArgumentException("Camera index is out of bounds: " + Count.ToString());
		1201
		1202	if (g_aCameraInfo[index].pMoniker == NULL)
		1203	throw gcnew ArgumentException("There is no camera at index: " + index.ToString());
		1204
		1205	if (g_pGraphBuilder != NULL)
		1206	throw gcnew ArgumentException("Graph Builder was null");
		1207
		1208	IMoniker *pMoniker = g_aCameraInfo[index].pMoniker;
		1209	pMoniker->AddRef();
		1210
		1211	IBaseFilter* pCap = NULL;
		1212	// Build the camera from the moniker
		1213	if (SUCCEEDED(hr))
		1214	hr = pMoniker->BindToObject(NULL, NULL, IID_IBaseFilter, (LPVOID*)&pCap);
		1215
		1216	ICaptureGraphBuilder2* captureGraphBuilder = NULL;
		1217	if (SUCCEEDED(hr))
		1218	{
		1219	hr = CoCreateInstance(CLSID_CaptureGraphBuilder2,
		1220	NULL,
		1221	CLSCTX_INPROC,
		1222	IID_ICaptureGraphBuilder2,
		1223	(LPVOID*)&captureGraphBuilder);
		1224	}
		1225
		1226	IAMStreamConfig *pConfig = NULL;
		1227	if(SUCCEEDED(hr))
		1228	hr = captureGraphBuilder->FindInterface(
		1229	&PIN_CATEGORY_CAPTURE,
		1230	&MEDIATYPE_Video,
		1231	pCap, // Pointer to the capture filter.
		1232	IID_IAMStreamConfig, (void**)&pConfig);
		1233
		1234	int iCount = 0, iSize = 0;
		1235	if(SUCCEEDED(hr))
		1236	hr = pConfig->GetNumberOfCapabilities(&iCount, &iSize);
		1237
		1238	// Check the size to make sure we pass in the correct structure.
		1239	if (SUCCEEDED(hr) && iSize == sizeof(VIDEO_STREAM_CONFIG_CAPS))
		1240	{
		1241	// Use the video capabilities structure.
		1242	for (int iFormat = 0; iFormat < iCount; iFormat++)
		1243	{
		1244	VIDEO_STREAM_CONFIG_CAPS scc;
		1245	AM_MEDIA_TYPE *pmt;
		1246	/* Note: Use of the VIDEO_STREAM_CONFIG_CAPS structure to configure a video device is
		1247	deprecated. Although the caller must allocate the buffer, it should ignore the
		1248	contents after the method returns. The capture device will return its supported
		1249	formats through the pmt parameter. */
		1250	hr = pConfig->GetStreamCaps(iFormat, &pmt, (BYTE*)&scc);
		1251	if (SUCCEEDED(hr))
		1252	{
		1253	/* Examine the format, and possibly use it. */
		1254	if (pmt->formattype == FORMAT_VideoInfo) {
		1255	// Check the buffer size.
		1256	if (pmt->cbFormat >= sizeof(VIDEOINFOHEADER))
		1257	{
		1258	VIDEOINFOHEADER pVih = reinterpret_cast<VIDEOINFOHEADER>(pmt->pbFormat);
		1259	BITMAPINFOHEADER *bmiHeader = &pVih->bmiHeader;
		1260
		1261	int width = bmiHeader->biWidth;
		1262	int height = bmiHeader->biHeight;
		1263	int bitCount = bmiHeader->biBitCount;
		1264
		1265	sizes->Add( gcnew Tuple<int,int,int>( width, height, bitCount ) );
		1266	}
		1267	}
		1268
		1269	// Delete the media type when you are done.
		1270	MyDeleteMediaType(pmt);
		1271	}
		1272	}
		1273	}
		1274
		1275	// Cleanup
		1276	if (pMoniker != NULL)
		1277	{
		1278	pMoniker->Release();
		1279	pMoniker = NULL;
		1280	}
		1281	}
		1282
		1283	IList<Tuple<int,int,int>^> ^ CameraMethods::CaptureSizes::get()
		1284	{
		1285	IList<Tuple<int,int,int>^> ^ result = gcnew List<Tuple<int,int,int>^>();
		1286
		1287	GetCaptureSizes( ActiveCameraIndex, result );
		1288
		1289	return result;
		1290	}
		1291
		1292	// If bpp is -1, the first format matching the width and height is selected.
		1293	// based on http://stackoverflow.com/questions/7383372/cant-make-iamstreamconfig-setformat-to-work-with-lifecam-studio
		1294	HRESULT CameraMethods::SetCaptureFormat(IBaseFilter* pCap, int width, int height, int bpp)
		1295	{
		1296	HRESULT hr = S_OK;
		1297
		1298	IAMStreamConfig *pConfig = NULL;
		1299	hr = g_pCaptureGraphBuilder->FindInterface(
		1300	&PIN_CATEGORY_CAPTURE,
		1301	&MEDIATYPE_Video,
		1302	pCap, // Pointer to the capture filter.
		1303	IID_IAMStreamConfig, (void**)&pConfig);
		1304	if (!SUCCEEDED(hr)) return hr;
		1305
		1306	int iCount = 0, iSize = 0;
		1307	hr = pConfig->GetNumberOfCapabilities(&iCount, &iSize);
		1308	if (!SUCCEEDED(hr)) return hr;
		1309
		1310	// Check the size to make sure we pass in the correct structure.
		1311	if (iSize == sizeof(VIDEO_STREAM_CONFIG_CAPS))
		1312	{
		1313	// Use the video capabilities structure.
		1314	for (int iFormat = 0; iFormat < iCount; iFormat++)
		1315	{
		1316	VIDEO_STREAM_CONFIG_CAPS scc;
		1317	AM_MEDIA_TYPE *pmt;
		1318	/* Note: Use of the VIDEO_STREAM_CONFIG_CAPS structure to configure a video device is
		1319	deprecated. Although the caller must allocate the buffer, it should ignore the
		1320	contents after the method returns. The capture device will return its supported
		1321	formats through the pmt parameter. */
		1322	hr = pConfig->GetStreamCaps(iFormat, &pmt, (BYTE*)&scc);
		1323	if (SUCCEEDED(hr))
		1324	{
		1325	/* Examine the format, and possibly use it. */
		1326	if (pmt->formattype == FORMAT_VideoInfo) {
		1327	// Check the buffer size.
		1328	if (pmt->cbFormat >= sizeof(VIDEOINFOHEADER))
		1329	{
		1330	VIDEOINFOHEADER pVih = reinterpret_cast<VIDEOINFOHEADER>(pmt->pbFormat);
		1331	BITMAPINFOHEADER *bmiHeader = &pVih->bmiHeader;
		1332
		1333	/* Access VIDEOINFOHEADER members through pVih. */
		1334	if( bmiHeader->biWidth == width && bmiHeader->biHeight == height && ( bmiHeader->biBitCount == -1 \|\| bmiHeader->biBitCount == bpp) )
		1335	{
		1336	hr = pConfig->SetFormat(pmt);
		1337
		1338	break;
		1339	}
		1340	}
		1341	}
		1342
		1343	// Delete the media type when you are done.
		1344	MyDeleteMediaType(pmt);
		1345	}
		1346	}
		1347	}
		1348
		1349	return hr;
		1350	}

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