116 lines
3.5 KiB
C
116 lines
3.5 KiB
C
/*
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* Copyright (c) Microsoft Corporation 1993. All Rights Reserved.
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*/
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/*
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* vcstruct.h
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*
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* 32-bit Video Capture Driver
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*
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* This header describes structures used in the interface between the
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* kernel driver and the user-mode dll.
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*
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* Geraint Davies, Feb 93.
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*/
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#ifndef _VCSTRUCT_
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#define _VCSTRUCT_
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/* --- configuration ------------------------------------------------- */
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/*
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* this structure contains configuration information generated
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* by the hardware-specific dialogs and sent to the hardware-specific
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* kernel-mode code. No one else knows its format.
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*
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* these generic structures are used so that driver writers can
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* change the user-mode dialogs and the supporting hardware-specific code
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* and yet still use the common code for interfacing between the
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* two and dealing with NT.
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*/
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typedef struct _CONFIG_INFO {
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ULONG ulSize; /* size of struct including size field */
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BYTE ulData[1]; /* (ulSize - sizeof(ULONG)) bytes of data */
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} CONFIG_INFO, *PCONFIG_INFO;
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/* --- overlay keying and region setting ---------------------------- */
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typedef struct _OVERLAY_MODE {
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ULONG ulMode;
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} OVERLAY_MODE, *POVERLAY_MODE;
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/* values for overlay mode field - or-ed together */
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#define VCO_KEYCOLOUR 1 // true if a key colour supported
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#define VCO_KEYCOLOUR_FIXED 2 // if not true, you can change it
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#define VCO_KEYCOLOUR_RGB 4 // if not true, use palette index
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#define VCO_SIMPLE_RECT 8 // if true, supports a single rect
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#define VCO_COMPLEX_REGION 0x10 // if true, supports complex regions.
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/*
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* values indicating whether we can put data back into the frame
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* buffer for overlaying (we support the DrawFrame ioctl for the
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* Y411 and/or S422 formats
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*/
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#define VCO_CAN_DRAW_Y411 0x20 // 7-bit 4:1:1 yuv ala bravado
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#define VCO_CAN_DRAW_S422 0x40 // 8-bit 4:2:2 yuv ala spigot
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#define VCO_CAN_DRAW 0x60 // for testing: can he draw anything?
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typedef struct _OVERLAY_RECTS {
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ULONG ulCount; // total number of rects in array
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RECT rcRects[1]; // ulCount rectangles.
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}OVERLAY_RECTS, *POVERLAY_RECTS;
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typedef RGBQUAD * PRGBQUAD;
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/* --- frame capture ------------------------------------------------ */
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/*
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* declaring a real LPVIDEOHDR in the kernel driver is too much of a
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* pain with header files. So the kernel interface will use this declaration
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*/
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typedef struct _CAPTUREBUFFER {
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PUCHAR lpData; /* buffer data area */
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ULONG BufferLength; /* length of buffer */
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ULONG BytesUsed; /* actual bytes of data (size of dib) */
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ULONG TimeCaptured; /* millisec time stamp */
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PVOID Context; /* pointer to user context data */
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DWORD dwFlags; /* not used by kernel interface */
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/*
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* remaining are declared as 4 reserved dwords in orig struct
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* we use these fields for partial-frame requests
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*/
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DWORD dwWindowOffset; /* current window offset from
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* start of buffer
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*/
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DWORD dwWindowLength; /* length of current window */
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DWORD dwReserved[2]; /* not used */
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} CAPTUREBUFFER, * PCAPTUREBUFFER;
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/* --- drawing ------------------------------------------------------- */
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/*
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* used by sample hardware codec to write data back into frame buffer
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*/
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typedef struct _DRAWBUFFER {
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PUCHAR lpData; /* frame data to be drawn */
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ULONG ulWidth; /* width of frame in pixels */
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ULONG ulHeight; /* height of frame in pixels */
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ULONG Format; /* h/w specific data format code */
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RECT rcSource; /* write only this rect to the device */
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} DRAWBUFFER, *PDRAWBUFFER;
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#endif //_VCSTRUCT_
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