327 lines
8.9 KiB
C
327 lines
8.9 KiB
C
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/*----------------------------------------------------------------------+
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| drvproc.c - driver procedure |
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| Copyright (c) 1993 Microsoft Corporation. |
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| All Rights Reserved. |
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+----------------------------------------------------------------------*/
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#include <windows.h>
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#include "msyuv.h"
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HMODULE ghModule; // Our DLL module handle
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/***************************************************************************
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* DriverProc - The entry point for an installable driver.
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*
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* PARAMETERS
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* dwDriverId: For most messages, <dwDriverId> is the DWORD
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* value that the driver returns in response to a <DRV_OPEN> message.
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* Each time that the driver is opened, through the <DrvOpen> API,
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* the driver receives a <DRV_OPEN> message and can return an
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* arbitrary, non-zero value. The installable driver interface
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* saves this value and returns a unique driver handle to the
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* application. Whenever the application sends a message to the
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* driver using the driver handle, the interface routes the message
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* to this entry point and passes the corresponding <dwDriverId>.
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* This mechanism allows the driver to use the same or different
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* identifiers for multiple opens but ensures that driver handles
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* are unique at the application interface layer.
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*
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* The following messages are not related to a particular open
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* instance of the driver. For these messages, the dwDriverId
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* will always be zero.
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*
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* DRV_LOAD, DRV_FREE, DRV_ENABLE, DRV_DISABLE, DRV_OPEN
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*
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* hDriver: This is the handle returned to the application by the
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* driver interface.
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*
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* uiMessage: The requested action to be performed. Message
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* values below <DRV_RESERVED> are used for globally defined messages.
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* Message values from <DRV_RESERVED> to <DRV_USER> are used for
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* defined driver protocols. Messages above <DRV_USER> are used
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* for driver specific messages.
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*
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* lParam1: Data for this message. Defined separately for
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* each message
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*
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* lParam2: Data for this message. Defined separately for
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* each message
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*
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* RETURNS
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* Defined separately for each message.
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*
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***************************************************************************/
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LRESULT DriverProc(PINSTINFO pi, HDRVR hDriver, UINT uiMessage, LPARAM lParam1, LPARAM lParam2)
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{
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switch (uiMessage)
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{
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case DRV_LOAD:
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#ifdef _WIN32
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if (ghModule) {
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// AVI explicitly loads us as well, but does not pass the
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// correct (as known by WINMM) driver handle.
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} else {
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ghModule = (HANDLE) GetDriverModuleHandle(hDriver);
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}
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#endif
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return (LRESULT) 1L;
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case DRV_FREE:
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return (LRESULT)1L;
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case DRV_OPEN:
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// if being opened with no open struct, then return a non-zero
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// value without actually opening
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if (lParam2 == 0L)
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return 0xFFFF0000;
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return (LRESULT)(DWORD_PTR) Open((ICOPEN FAR *) lParam2);
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case DRV_CLOSE:
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#ifdef _WIN32
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if (pi != (PINSTINFO)(ULONG_PTR)0xFFFF0000)
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#else
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if (pi)
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#endif
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Close(pi);
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return (LRESULT)1L;
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/*********************************************************************
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state messages
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*********************************************************************/
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case DRV_QUERYCONFIGURE: // configuration from drivers applet
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return (LRESULT)0L;
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case DRV_CONFIGURE:
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return DRV_OK;
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case ICM_CONFIGURE:
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//
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// return ICERR_OK if you will do a configure box, error otherwise
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//
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if (lParam1 == -1)
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return QueryConfigure(pi) ? ICERR_OK : ICERR_UNSUPPORTED;
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else
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return Configure(pi, (HWND)lParam1);
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case ICM_ABOUT:
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//
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// return ICERR_OK if you will do a about box, error otherwise
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//
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if (lParam1 == -1)
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return QueryAbout(pi) ? ICERR_OK : ICERR_UNSUPPORTED;
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else
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return About(pi, (HWND)lParam1);
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case ICM_GETSTATE:
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return GetState(pi, (LPVOID)lParam1, (DWORD)lParam2);
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case ICM_SETSTATE:
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return SetState(pi, (LPVOID)lParam1, (DWORD)lParam2);
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case ICM_GETINFO:
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return GetInfo(pi, (ICINFO FAR *)lParam1, (DWORD)lParam2);
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case ICM_GETDEFAULTQUALITY:
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if (lParam1)
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{
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*((LPDWORD)lParam1) = 7500;
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return ICERR_OK;
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}
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break;
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/*********************************************************************
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compression messages
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*********************************************************************/
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#ifdef ICM_COMPRESS_SUPPORTED
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case ICM_COMPRESS_QUERY:
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return CompressQuery(pi,
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(LPBITMAPINFOHEADER)lParam1,
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(LPBITMAPINFOHEADER)lParam2);
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case ICM_COMPRESS_BEGIN:
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return CompressBegin(pi,
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(LPBITMAPINFOHEADER)lParam1,
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(LPBITMAPINFOHEADER)lParam2);
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case ICM_COMPRESS_GET_FORMAT:
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return CompressGetFormat(pi,
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(LPBITMAPINFOHEADER)lParam1,
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(LPBITMAPINFOHEADER)lParam2);
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case ICM_COMPRESS_GET_SIZE:
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return CompressGetSize(pi,
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(LPBITMAPINFOHEADER)lParam1,
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(LPBITMAPINFOHEADER)lParam2);
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case ICM_COMPRESS:
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return Compress(pi,
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(ICCOMPRESS FAR *)lParam1, (DWORD)lParam2);
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case ICM_COMPRESS_END:
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return CompressEnd(pi);
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#endif // ICM_DRAW_SUPPORTED
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/*********************************************************************
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decompress messages
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*********************************************************************/
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case ICM_DECOMPRESS_QUERY:
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return DecompressQuery(pi,
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(LPBITMAPINFOHEADER)lParam1,
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(LPBITMAPINFOHEADER)lParam2);
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case ICM_DECOMPRESS_BEGIN:
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return DecompressBegin(pi,
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(LPBITMAPINFOHEADER)lParam1,
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(LPBITMAPINFOHEADER)lParam2);
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case ICM_DECOMPRESS_GET_FORMAT:
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return DecompressGetFormat(pi,
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(LPBITMAPINFOHEADER)lParam1,
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(LPBITMAPINFOHEADER)lParam2);
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case ICM_DECOMPRESS_GET_PALETTE:
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return DecompressGetPalette(pi,
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(LPBITMAPINFOHEADER)lParam1,
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(LPBITMAPINFOHEADER)lParam2);
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case ICM_DECOMPRESS:
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return Decompress(pi,
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(ICDECOMPRESS FAR *)lParam1, (DWORD)lParam2);
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case ICM_DECOMPRESS_END:
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return DecompressEnd(pi);
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/*********************************************************************
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draw messages
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*********************************************************************/
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#ifdef ICM_DRAW_SUPPORTED
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case ICM_DRAW_BEGIN:
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/*
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* sent when a sequence of draw calls are about to start -
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* enable hardware.
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*/
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return DrawBegin(pi,(ICDRAWBEGIN FAR *)lParam1, (DWORD)lParam2);
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case ICM_DRAW:
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/*
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* frame ready for decompress. Since we don't have any pre-buffering,
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* it is ok to render the frame at this time too. If we had
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* pre-buffer, we would queue now, and start clocking frames out
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* on the draw-start message.
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*/
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return Draw(pi,(ICDRAW FAR *)lParam1, (DWORD)lParam2);
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case ICM_DRAW_END:
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/*
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* this message is sent when the sequence of draw calls has finished -
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* note that the final frame should remain rendered!! - so we can't
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* disable the hardware yet.
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*/
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//return DrawEnd(pi);
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return((DWORD) ICERR_OK);
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case ICM_DRAW_WINDOW:
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/*
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* the window has changed position or z-ordering. re-sync the
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* hardware rendering.
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*/
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return(DrawWindow(pi, (PRECT)lParam1));
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case ICM_DRAW_QUERY:
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/*
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* can we draw this format ? (lParam2 may (should?) be null)
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*/
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return DrawQuery(pi,
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(LPBITMAPINFOHEADER)lParam1,
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(LPBITMAPINFOHEADER)lParam2);
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case ICM_DRAW_START:
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case ICM_DRAW_STOP:
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/*
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* only relevant if you have pre-buffering.
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*/
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return( (DWORD) ICERR_OK);
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#endif // ICM_DRAW_SUPPORTED
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/*********************************************************************
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standard driver messages
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*********************************************************************/
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case DRV_DISABLE:
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case DRV_ENABLE:
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return (LRESULT)1L;
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case DRV_INSTALL:
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case DRV_REMOVE:
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return (LRESULT)DRV_OK;
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}
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if (uiMessage < DRV_USER)
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return DefDriverProc((UINT_PTR)pi, hDriver, uiMessage,lParam1,lParam2);
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else
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return ICERR_UNSUPPORTED;
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}
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#ifdef _WIN32
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#if 0 // done on DRV_LOAD
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BOOL DllInstanceInit(PVOID hModule, ULONG Reason, PCONTEXT pContext)
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{
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if (Reason == DLL_PROCESS_ATTACH) {
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ghModule = (HANDLE) hModule;
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DisableThreadLibraryCalls(hModule);
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}
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return TRUE;
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}
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#endif
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#else
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/****************************************************************************
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* LibMain - Library initialization code.
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*
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* PARAMETERS
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* hModule: Our module handle.
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*
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* wHeapSize: The heap size from the .def file.
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*
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* lpCmdLine: The command line.
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*
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* Returns 1 if the initialization was successful and 0 otherwise.
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***************************************************************************/
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int NEAR PASCAL LibMain(HMODULE hModule, WORD wHeapSize, LPSTR lpCmdLine)
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{
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ghModule = hModule;
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return 1;
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}
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#endif
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