src/lib/platform/windows/os-edid.cpp

   1 /*
   2  * This file is part of the libCEC(R) library.
   3  *
   4  * libCEC(R) is Copyright (C) 2011-2012 Pulse-Eight Limited.  All rights reserved.
   5  * libCEC(R) is an original work, containing original code.
   6  *
   7  * libCEC(R) is a trademark of Pulse-Eight Limited.
   8  *
   9  * This program is dual-licensed; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  22  *
  23  *
  24  * Alternatively, you can license this library under a commercial license,
  25  * please contact Pulse-Eight Licensing for more information.
  26  *
  27  * For more information contact:
  28  * Pulse-Eight Licensing       <license@pulse-eight.com>
  29  *     http://www.pulse-eight.com/
  30  *     http://www.pulse-eight.net/
  31  */
  32
  33 #include "../util/edid.h"
  34
  35 #include "windows.h"
  36 #include "setupapi.h"
  37 #include "initguid.h"
  38 #include "stdio.h"
  39
  40 using namespace PLATFORM;
  41
  42 static GUID MONITOR_GUID =  { 0x4D36E96E, 0xE325, 0x11CE, { 0xBF, 0xC1, 0x08, 0x00, 0x2B, 0xE1, 0x03, 0x18 } };
  43 #define PA_MAX_REGENTRIES_TO_CHECK 1024
  44
  45 uint16_t GetPhysicalAddressFromDevice(IN HDEVINFO hDevHandle, IN PSP_DEVINFO_DATA deviceInfoData)
  46 {
  47   uint16_t iPA(0);
  48
  49   HKEY hDevRegKey = SetupDiOpenDevRegKey(hDevHandle, deviceInfoData, DICS_FLAG_GLOBAL, 0, DIREG_DEV, KEY_ALL_ACCESS);
  50   if (hDevRegKey)
  51   {
  52     CHAR  regEntryName[128];
  53     DWORD regEntryNameLength(128);
  54     DWORD type;
  55     LONG  retVal(ERROR_SUCCESS);
  56
  57     for (LONG ptr = 0; iPA == 0 && retVal == ERROR_SUCCESS && ptr < PA_MAX_REGENTRIES_TO_CHECK; ptr++)
  58     {
  59       BYTE regEntryData[1024];
  60       DWORD regEntryDataSize = sizeof(regEntryData);
  61
  62       retVal = RegEnumValue(hDevRegKey, ptr, &regEntryName[0], &regEntryNameLength, NULL, &type, regEntryData, &regEntryDataSize);
  63
  64       if (retVal == ERROR_SUCCESS && !strcmp(regEntryName,"EDID"))
  65         iPA = CEDIDParser::GetPhysicalAddressFromEDID(regEntryData, regEntryDataSize);
  66     }
  67     RegCloseKey(hDevRegKey);
  68   }
  69
  70   return iPA;
  71 }
  72
  73 uint16_t CEDIDParser::GetPhysicalAddress(void)
  74 {
  75   HDEVINFO hDevHandle;
  76   uint16_t iPA(0);
  77   SP_DEVINFO_DATA deviceInfoData;
  78
  79   hDevHandle = SetupDiGetClassDevsEx(&MONITOR_GUID, NULL, NULL, DIGCF_PRESENT, NULL,  NULL, NULL);
  80   if (!hDevHandle)
  81     return iPA;
  82
  83   for (int i=0; ERROR_NO_MORE_ITEMS != GetLastError(); i++)
  84   {
  85     memset(&deviceInfoData, 0, sizeof(SP_DEVINFO_DATA));
  86     deviceInfoData.cbSize = sizeof(SP_DEVINFO_DATA);
  87
  88     if (SetupDiEnumDeviceInfo(hDevHandle,i, &deviceInfoData))
  89     {
  90       iPA = GetPhysicalAddressFromDevice(hDevHandle, &deviceInfoData);
  91     }
  92   }
  93
  94   return iPA;
  95 }