271 lines
8.1 KiB
C
271 lines
8.1 KiB
C
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/******************************************************************************
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Copyright (C) Microsoft Corporation 1985-1991. All rights reserved.
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Title: drvproc.c - Multimedia Systems Media Control Interface
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driver for AVI.
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*****************************************************************************/
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#include <nt.h>
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#include <ntrtl.h>
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#include <nturtl.h> // for {struct _TEB} defintion
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#include "graphic.h"
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#include "cnfgdlg.h" // to get IDA_CONFIG
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#include "avitask.h" // to get mciaviTaskCleanup()
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#ifndef _WIN32 // Not used in 32 bit world
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void NEAR PASCAL AppExit(HTASK htask, BOOL fNormalExit);
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#endif
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#define CONFIG_ID 10000L // Use the hiword of dwDriverID to identify
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HANDLE ghModule;
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extern HWND ghwndConfig;
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extern const TCHAR szIni[];
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/* Link to DefDriverProc in MMSystem explicitly, so we don't get the
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** one in USER by mistake.
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*/
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#ifndef _WIN32
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extern DWORD FAR PASCAL mmDefDriverProc(DWORD, HANDLE, UINT, DWORD, DWORD);
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#else
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#define mmDefDriverProc DefDriverProc
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#endif
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#ifndef _WIN32
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BOOL FAR PASCAL LibMain (HANDLE hModule, int cbHeap, LPSTR lpchCmdLine)
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{
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ghModule = hModule;
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return TRUE;
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}
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#else
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#if 0
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// Get the module handle 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 = hModule; // All we need to save is our module handle...
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} else {
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if (Reason == DLL_PROCESS_DETACH) {
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}
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}
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return TRUE;
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}
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#endif
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#endif // WIN16
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/***************************************************************************
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*
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* @doc INTERNAL
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*
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* @api DWORD | DriverProc | The entry point for an installable driver.
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*
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* @parm DWORD | 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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*
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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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* @parm UINT | wMessage | 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 portocols. Messages above DRV_USER are used
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* for driver specific messages.
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*
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* @parm DWORD | dwParam1 | Data for this message. Defined separately for
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* each message
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*
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* @parm DWORD | dwParam2 | Data for this message. Defined separately for
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* each message
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*
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* @rdesc Defined separately for each message.
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*
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***************************************************************************/
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LRESULT FAR PASCAL _LOADDS DriverProc (DWORD_PTR dwDriverID, HANDLE hDriver, UINT wMessage,
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LPARAM dwParam1, LPARAM dwParam2)
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{
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DWORD_PTR dwRes = 0L;
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/*
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* critical sections are now per-device. This means they
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* cannot be held around the whole driver-proc, since until we open
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* the device, we don't have a critical section to hold.
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* The critical section is allocated in mciSpecial on opening. It is
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* also held in mciDriverEntry, in GraphicWndProc, and around
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* all worker thread draw functions.
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*/
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switch (wMessage)
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{
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// Standard, globally used messages.
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case DRV_LOAD:
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{
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struct _TEB *pteb;
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BOOL bWow64;
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#ifdef _WIN32
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if (ghModule) {
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Assert(!"Did not expect ghModule to be non-NULL");
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}
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ghModule = GetDriverModuleHandle(hDriver); // Remember
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// The WOW guys say that the proper method of detecting
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// whether we're talking to a 16-bit app is to test
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// NtCurrentTeb()->WOW32Reserved; if it's nonzero, it's 16-bit.
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// In the (unlikely) event that we can't test that, default
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// to using the old detection method.
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// On 64-bit systems WOW32Reserved is used for something else.
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//
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if (!IsWow64Process(GetCurrentProcess(), &bWow64)) {
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break;
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}
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if (!bWow64) {
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if ((pteb = NtCurrentTeb()) != NULL) {
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runningInWow = (pteb->WOW32Reserved != 0) ? TRUE : FALSE;
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} else {
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#define GET_MAPPING_MODULE_NAME TEXT("wow32.dll")
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runningInWow = (GetModuleHandle(GET_MAPPING_MODULE_NAME) != NULL);
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}
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}
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#endif
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if (GraphicInit()) // Initialize graphic mgmt.
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dwRes = 1L;
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else
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dwRes = 0L;
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break;
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}
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case DRV_FREE:
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GraphicFree();
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dwRes = 1L;
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DPF(("Returning from DRV_FREE\n"));
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Assert(npMCIList == NULL);
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ghModule = NULL;
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break;
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case DRV_OPEN:
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if (!dwParam2)
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dwRes = CONFIG_ID;
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else
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dwRes = GraphicDrvOpen((LPMCI_OPEN_DRIVER_PARMS)dwParam2);
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break;
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case DRV_CLOSE:
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/* If we have a configure dialog up, fail the close.
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** Otherwise, we'll be unloaded while we still have the
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** configuration window up.
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*/
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if (ghwndConfig)
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dwRes = 0L;
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else
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dwRes = 1L;
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break;
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case DRV_ENABLE:
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dwRes = 1L;
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break;
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case DRV_DISABLE:
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dwRes = 1L;
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break;
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case DRV_QUERYCONFIGURE:
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dwRes = 1L; /* Yes, we can be configured */
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break;
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case DRV_CONFIGURE:
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ConfigDialog((HWND)(UINT)dwParam1, NULL);
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dwRes = 1L;
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break;
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#ifndef _WIN32
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//
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// sent when a application is terminating
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//
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// lParam1:
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// DRVEA_ABNORMALEXIT
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// DRVEA_NORMALEXIT
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//
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case DRV_EXITAPPLICATION:
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AppExit(GetCurrentTask(), (BOOL)dwParam1 == DRVEA_NORMALEXIT);
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break;
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#endif
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default:
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if (!HIWORD(dwDriverID) &&
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wMessage >= DRV_MCI_FIRST &&
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wMessage <= DRV_MCI_LAST)
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dwRes = mciDriverEntry ((UINT) (UINT_PTR) dwDriverID,
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wMessage,
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(UINT) dwParam1,
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(LPMCI_GENERIC_PARMS)dwParam2);
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else
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dwRes = mmDefDriverProc(dwDriverID,
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hDriver,
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wMessage,
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dwParam1,
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dwParam2);
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break;
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}
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return dwRes;
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}
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#ifndef _WIN32
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/*****************************************************************************
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* @doc INTERNAL
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*
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* @func void | AppExit |
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* a application is exiting
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*
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****************************************************************************/
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void NEAR PASCAL AppExit(HTASK htask, BOOL fNormalExit)
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{
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//
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// walk the list of open MCIAVI instances and see if
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// the dying task is the background task and do cleanup.
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//
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NPMCIGRAPHIC npMCI;
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// Note: we do not have EnterList/LeaveList macros here as this is
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// explicitly NOT Win32 code.
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for (npMCI=npMCIList; npMCI; npMCI = npMCI->npMCINext) {
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if (npMCI->hTask == htask) {
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DPF(("Calling mciaviTaskCleanup()\n"));
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mciaviTaskCleanup(npMCI);
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return;
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}
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}
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}
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#endif
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