1394camera_project.zip_project

/*++ Copyright (c) 1998 Microsoft Corporation Module Name: 1394main.c Abstract Authors: Peter Binder (pbinder) 4/22/98 Christopher Baker (cbaker) 10/01 Revision History: Date Who What -------- --------- ------------------------------------------------------------ 4/22/98 pbinder moved from 1394api.c 10/11/01 cbaker stripped out the automagic stuff that was causing problems, modified GetDeviceList 10/20/01 cbaker added [Get/Reset\CmdrState to assist in recovery from program crashes 10/24/01 cbaker added ReadRegister/WriteRegister Get[Model/Vendor]Name 10/29/01 cbaker added WriteRegisterUL --*/ #define _1394MAIN_C #define INITGUID #include "pch.h" #undef _1394MAIN_C /* * DllMain * * Dll Entry Function * * Under 1394diag, this function did a bunch of things with shared memory and process management * * Now, it does nothing interesting at all */ HINSTANCE g_hInstDLL; BOOL WINAPI DllMain( HINSTANCE hInstance, ULONG ulReason, LPVOID pvReserved ) { HKEY myKey = NULL; DWORD dwDisp,dwRet,dwTraceLevel = DLL_TRACE_WARNING,dwType,dwSize = sizeof(DWORD); g_hInstDLL = hInstance; // now that we don't start the extra process nor muck around with shared // memory and device change signals and bus resets, DllMain is really simple if(ulReason == DLL_PROCESS_ATTACH) { // load the tracelevel from the registry DllTrace(DLL_TRACE_ALWAYS,"DllMain: DLL_PROCESS_ATTACH to 1394Camera.dll version 6.00.00.0000\n"); dwRet = RegCreateKeyEx(HKEY_LOCAL_MACHINE,"Software\\CMU\\1394Camera",0,NULL,REG_OPTION_NON_VOLATILE,KEY_ALL_ACCESS,NULL,&myKey,&dwDisp); if(dwRet != ERROR_SUCCESS) { DllTrace(DLL_TRACE_ERROR,"DllMain: Failed to open the key (%d)\n",dwRet); myKey = NULL; } else { if(dwDisp == REG_CREATED_NEW_KEY) { DllTrace(DLL_TRACE_CHECK,"DllMain: New key was created, setting TraceLevel to DLL_TRACE_WARNING\n"); dwTraceLevel = DLL_TRACE_WARNING; dwRet = RegSetValueEx(myKey,"DllTraceLevel",0,REG_DWORD,(LPBYTE)&dwTraceLevel,dwSize); if(dwRet != ERROR_SUCCESS) DllTrace(DLL_TRACE_ERROR,"DllMain: error setting TraceLevel registry key (%d)\n",dwRet); } else { DllTrace(DLL_TRACE_CHECK,"DllMain: Old Key was opened, getting TraceLevel\n"); dwRet = RegQueryValueEx(myKey,"DllTraceLevel",NULL,&dwType,(LPBYTE)&dwTraceLevel,&dwSize); if(dwRet != ERROR_SUCCESS) { DllTrace(DLL_TRACE_ERROR,"DllMain: error getting TraceLevel registry key (%d)\n",dwRet); // default to TRACE_WARNING (that is, errors and warnings only dwTraceLevel = DLL_TRACE_WARNING; } else { DllTrace(DLL_TRACE_CHECK,"DllMain: Read Tracelevel as %d\n",dwTraceLevel); } } RegCloseKey(myKey); } SetDllTraceLevel(dwTraceLevel); } return TRUE; } /* * GetCmdrState * * Currently just a stub that doesn't do anything noteworthy * May eventually be used to report statistics, or more */ DWORD CAMAPI GetCmdrState( PSTR szDeviceName) { DWORD state; HANDLE hDevice = OpenDevice(szDeviceName,FALSE); if(hDevice != INVALID_HANDLE_VALUE) { if(DeviceIoControl(hDevice,IOCTL_GET_CMDR_STATE,NULL,0,&state,sizeof(DWORD),NULL,NULL)) { return state; } } return -1; } /* * SetCmdrTraceLevel * * This is another stub in case I ever decide to * reorganize the trace output from the driver. */ DWORD CAMAPI SetCmdrTraceLevel( PSTR szDeviceName, DWORD nlevel) { DWORD level = nlevel; HANDLE hDevice = OpenDevice(szDeviceName,FALSE); if(hDevice != INVALID_HANDLE_VALUE) { if(DeviceIoControl(hDevice,IOCTL_GET_CMDR_STATE,&level,sizeof(DWORD),NULL,0,NULL,NULL)) { return 0; } } return -1; } /* * GetDeviceList * * Checks the GUID_1394CAMERA interface for all 1394 Digital cameras in the system * and returns their device names in DeviceData * * args: * DeviceData: a pointer to an externally allocated DEVICE_DATA structure; * * returns: * the number of cameras discovered, or * -1 on error */ DWORD CAMAPI GetDeviceList( PDEVICE_DATA DeviceData ) { HDEVINFO hDevInfo; ULONG i = 0; SP_DEVICE_INTERFACE_DATA deviceInterfaceData; PSP_DEVICE_INTERFACE_DETAIL_DATA DeviceInterfaceDetailData; ULONG requiredSize; GUID t1394CmdrGUID; ULONG dwError; HWND hWnd = NULL; BOOL bReturn; DllTrace(DLL_TRACE_ENTER, "Enter GetDeviceList(0x%08x)\r\n",DeviceData); /******************************/ /* for this to work, you MUST */ /* define INITGUID before */ /* including pch.h */ /* otherwise you get an */ /* unresolved external symbol */ /* for t1394CmdrGUID */ /******************************/ t1394CmdrGUID = GUID_1394CMDR; memset(DeviceData,0,sizeof(DEVICE_DATA)); // get a handle to 1394 test class using guid. hDevInfo = SetupDiGetClassDevs( &t1394CmdrGUID, NULL, NULL, (DIGCF_PRESENT | DIGCF_INTERFACEDEVICE) ); if (!hDevInfo) { dwError = GetLastError(); DllTrace(DLL_TRACE_ERROR, "GetDeviceList: SetupDiGetClassDevs failed = 0x%x\r\n", dwError); return -1; } // here we're going to loop and find all of the // 1394 camera interfaces available. while (TRUE) { DllTrace(DLL_TRACE_VERBOSE,"GetDeviceList: Enumerating Device %d\r\n",i); deviceInterfaceData.cbSize = sizeof(SP_DEVICE_INTERFACE_DATA); if (!SetupDiEnumDeviceInterfaces(hDevInfo, NULL, &t1394CmdrGUID, i, &deviceInterfaceData)) { dwError = GetLastError(); if(dwError != ERROR_NO_MORE_ITEMS) { DllTrace(DLL_TRACE_ERROR,"GetDeviceList: SetupDiEnumDeviceInterfaces failed -> 0x%x\r\n", dwError); return -1; } else { DllTrace(DLL_TRACE_CHECK,"GetDeviceList: No More Items\r\n"); break; } } // figure out the size... bReturn = SetupDiGetDeviceInterfaceDetail( hDevInfo, &deviceInterfaceData, NULL, 0, &requiredSize, NULL ); if (!bReturn) { dwError = GetLastError(); if(dwError != ERROR_INSUFFICIENT_BUFFER) { DllTrace(DLL_TRACE_ERROR, "GetDeviceList: SetupDiGetDeviceInterfaceDetail Failed (1) -> 0x%x\r\n", dwError); SetupDiDestroyDeviceInfoList(hDevInfo); return -1; } } else { DllTrace(DLL_TRACE_ERROR,"GetDeviceList: I really shouldn't be here (%s:%d)\r\n",__FILE__,__LINE__); SetupDiDestroyDeviceInfoList(hDevInfo); return -1; } DeviceInterfaceDetailData = LocalAlloc(LPTR, requiredSize); if(DeviceInterfaceDetailData == NULL) { DllTrace(DLL_TRACE_ERROR,"GetDeviceList: LocalAlloc Failed\r\n"); SetupDiDestroyDeviceInfoList(hDevInfo); return -1; } memset(DeviceInterfaceDetailData,0,requiredSize); DeviceInterfaceDetailData->cbSize = sizeof(SP_DEVICE_INTERFACE_DETAIL_DATA); bReturn = SetupDiGetDeviceInterfaceDetail( hDevInfo, &deviceInterfaceData, DeviceInterfaceDetailData, requiredSize, NULL, NULL ); if (!bReturn) { dwError = GetLastError(); DllTrace(DLL_TRACE_ERROR, "GetDeviceList: SetupDiGetDeviceInterfaceDetail Failed (2) -> 0x%x\r\n", dwError); SetupDiDestroyDeviceInfoList(hDevInfo); LocalFree(DeviceInterfaceDetailData); return -1; } else { // we have a device, let's put it in the list. DeviceData->numDevices++; strcp