87 lines
3 KiB
C++
87 lines
3 KiB
C++
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/****************************************************************************
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* @doc INTERNAL WDMDRIVER
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*
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* @module WDMDrivr.h | Include file for <c CWDMDriver> class used to
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* access the streaming class driver using IOctls.
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*
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* @comm This code is based on the VfW to WDM mapper code written by
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* FelixA and E-zu Wu. The original code can be found on
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* \\redrum\slmro\proj\wdm10\\src\image\vfw\win9x\raytube.
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*
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* Documentation by George Shaw on kernel streaming can be found in
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* \\popcorn\razzle1\src\spec\ks\ks.doc.
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*
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* WDM streaming capture is discussed by Jay Borseth in
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* \\blues\public\jaybo\WDMVCap.doc.
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***************************************************************************/
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#ifndef _WDMDRVR_H // { _WDMDRVR_H
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#define _WDMDRVR_H
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// Used to query and set video data ranges of a device
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typedef struct _tagDataRanges {
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ULONG Size;
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ULONG Count;
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KS_DATARANGE_VIDEO Data;
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} DATA_RANGES, * PDATA_RANGES;
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// Used to query/set video property values and ranges
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typedef struct {
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KSPROPERTY_DESCRIPTION proDesc;
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KSPROPERTY_MEMBERSHEADER proHdr;
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union {
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KSPROPERTY_STEPPING_LONG proData;
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ULONG ulData;
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};
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} PROCAMP_MEMBERSLIST;
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/****************************************************************************
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* @doc INTERNAL CWDMDRIVERCLASS
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*
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* @class CWDMDriver | This class provides access to the streaming class
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* driver, through which we acess the video capture mini-driver properties
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* using IOCtls.
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*
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* @mdata DWORD | CWDMDriver | m_dwDeviceID | Capture device ID.
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*
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* @mdata HANDLE | CWDMDriver | m_hDriver | This member holds the driver
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* file handle.
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*
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* @mdata PDATA_RANGES | CWDMDriver | m_pDataRanges | This member points
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* to the video data range structure.
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***************************************************************************/
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class CWDMDriver
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{
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public:
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CWDMDriver(DWORD dwDeviceID);
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~CWDMDriver();
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// Property functions
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BOOL GetPropertyValue(GUID guidPropertySet, ULONG ulPropertyId, PLONG plValue, PULONG pulFlags, PULONG pulCapabilities);
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BOOL GetDefaultValue(GUID guidPropertySet, ULONG ulPropertyId, PLONG plDefValue);
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BOOL GetRangeValues(GUID guidPropertySet, ULONG ulPropertyId, PLONG plMin, PLONG plMax, PLONG plStep);
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BOOL SetPropertyValue(GUID guidPropertySet, ULONG ulPropertyId, LONG lValue, ULONG ulFlags, ULONG ulCapabilities);
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// Device functions
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BOOL OpenDriver();
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BOOL CloseDriver();
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HANDLE GetDriverHandle() { return m_hDriver; }
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// Data range functions
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PDATA_RANGES GetDriverSupportedDataRanges() { return m_pDataRanges; };
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// Device IO function
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BOOL DeviceIoControl(HANDLE h, DWORD dwIoControlCode, LPVOID lpInBuffer, DWORD nInBufferSize, LPVOID lpOutBuffer, DWORD nOutBufferSize, LPDWORD lpBytesReturned, BOOL bOverlapped=TRUE);
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private:
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DWORD m_dwDeviceID; // Capture device ID
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HANDLE m_hDriver; // Driver file handle
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PDATA_RANGES m_pDataRanges; // Pin data ranges
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// Data range functions
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ULONG CreateDriverSupportedDataRanges();
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};
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#endif // } _WDMDRVR_H
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