//==========================================================================; // // THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY // KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE // IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR // PURPOSE. // // Copyright (c) 1992-1998 Microsoft Corporation // //--------------------------------------------------------------------------; // // config.c // // Description: // IMA ADPCM codec configuration init and dialog // // // The configuration parameters for this codec are: // // MaxRTEncodeSetting: // MaxRTDecodeSetting: // These determine the highest mono sample rate that // the codec will attempt to convert in real-time. // // PercentCPU: // This configuration parameter is not normally changed // by the user and is not presented in the config dialog. // This value affects the config dialog's 'Auto-Config' // calculation of MaxRTXxcodeSetting. // // These parameters may be set in the registry, using the imaadpcm subkey // (which corresponds to the alias name used for installation) under // the following key: // // HKEY_CURRENT_USER\Software\Microsoft\Multimedia // // // Note: The configuration dialog is only compiled into the code if the // IMAADPCM_USECONFIG symbol is defined. This is designed to make it // easy to remove the dialog box completely for certain platforms, // such as MIPS and Alpha under Windows NT. // //==========================================================================; #include #include #include #include #include #include #include "muldiv32.h" #include "codec.h" #include "imaadpcm.h" #include "debug.h" #ifdef WIN32 #include #else #define _tcstoul strtoul #define _tcsncpy _fstrncpy #endif #include #include #ifndef WIN32 #error Win16 support has been dropped from this codec! Compile for Win32. #endif #ifdef IMAADPCM_USECONFIG // // Strings required to access configuration information in the registry. // const TCHAR BCODE gszMaxRTEncodeSetting[] = TEXT("MaxRTEncodeSetting"); const TCHAR BCODE gszMaxRTDecodeSetting[] = TEXT("MaxRTDecodeSetting"); const TCHAR BCODE gszPercentCPU[] = TEXT("PercentCPU"); const TCHAR gszMultimediaKey[] = TEXT("Software\\Microsoft\\Multimedia\\"); //!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! // // Be careful changing the following! // //!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! // // Data required to access the dialog box help. // // Note that you must write your own help file for your codec, even if // the configuration dialog box looks identical. If you use the file // listed here, then the title will say "IMA ADPCM" or something. // // Note: the number HELPCONTEXT_IMAADPCM must be unique in the file // gszHelpFilename, and the number must defined in the [MAP] // section of the .hpj help project file. Then the .rtf file // will reference that number (using the keyword defined in // the .hpj file). Then when we call WinHelp with the number, // WinHelp will go to the right help entry. // const TCHAR BCODE gszHelpFilename[] = TEXT("audiocdc.hlp"); #define HELPCONTEXT_IMAADPCM 1001 #define IDH_AUDIOCDC_COMPRESSION 100 #define IDH_AUDIOCDC_DECOMPRESSION 200 #define IDH_AUDIOCDC_AUTOCONFIGURE 300 static int aKeyWordIds[] = { IDC_COMBO_MAXRTENCODE, IDH_AUDIOCDC_COMPRESSION, IDC_STATIC_COMPRESS, IDH_AUDIOCDC_COMPRESSION, IDC_COMBO_MAXRTDECODE, IDH_AUDIOCDC_DECOMPRESSION, IDC_STATIC_DECOMPRESS, IDH_AUDIOCDC_DECOMPRESSION, IDC_BTN_AUTOCONFIG, IDH_AUDIOCDC_AUTOCONFIGURE, 0, 0 }; //==========================================================================; // // // // //==========================================================================; //--------------------------------------------------------------------------; // // VOID configWriteConfiguration // // Description: // // This routine writes the configuration data in PDI to the registry. // This consists of the max real-time Encode and Decode settings. // // Arguments: // PDRIVERINSTANCE pdi // // Return (VOID): None. // //--------------------------------------------------------------------------; VOID configWriteConfiguration ( PDRIVERINSTANCE pdi ) { DWORD dw; if( NULL != pdi->hkey ) { dw = (DWORD)pdi->nConfigMaxRTEncodeSetting; (void)RegSetValueEx( pdi->hkey, (LPTSTR)gszMaxRTEncodeSetting, 0, REG_DWORD, (LPBYTE)&dw, sizeof(DWORD) ); dw = (DWORD)pdi->nConfigMaxRTDecodeSetting; (void)RegSetValueEx( pdi->hkey, (LPTSTR)gszMaxRTDecodeSetting, 0, REG_DWORD, (LPBYTE)&dw, sizeof(DWORD) ); } } //--------------------------------------------------------------------------; // // DWORD dwReadRegistryDefault // // Description: // // This routine reads a given value from the registry, and returns a // default value if the read is not successful. // // Arguments: // HKEY hkey: Registry key to read from. // LPTSTR lpszEntry: // DWORD dwDefault: // // Return (DWORD): // //--------------------------------------------------------------------------; INLINE DWORD dwReadRegistryDefault ( HKEY hkey, LPTSTR lpszEntry, DWORD dwDefault ) { DWORD dwType = (DWORD)~REG_DWORD; // Init to anything but REG_DWORD. DWORD cbSize = sizeof(DWORD); DWORD dwRet; LONG lError; ASSERT( NULL != hkey ); ASSERT( NULL != lpszEntry ); lError = RegQueryValueEx( hkey, lpszEntry, NULL, &dwType, (LPBYTE)&dwRet, &cbSize ); if( ERROR_SUCCESS != lError || REG_DWORD != dwType ) dwRet = dwDefault; return dwRet; } //--------------------------------------------------------------------------; // // VOID configSetDefaults // // Description: // // This routine sets the configuration parameters to their default // values. // // Arguments: // PDRIVERINSTANCE pdi: // //--------------------------------------------------------------------------; VOID configSetDefaults ( PDRIVERINSTANCE pdi ) { pdi->nConfigMaxRTEncodeSetting = IMAADPCM_CONFIG_DEFAULT_MAXRTENCODESETTING; pdi->nConfigMaxRTDecodeSetting = IMAADPCM_CONFIG_DEFAULT_MAXRTDECODESETTING; pdi->nConfigPercentCPU = IMAADPCM_CONFIG_DEFAULT_PERCENTCPU; } //--------------------------------------------------------------------------; // // UINT configAutoConfig // // Description: // // We will determine how much time it takes to encode and then decode // 2 seconds of data and use this to guess at the max sample // rate we can convert in real-time. // // The max is computed with essentially 100% of the CPU. Practically, // we won't have 100% of the CPU available. So we take a percentage // of the computed max and use that as the max in the config dialog. // // The percentage that we use can be set in the ini file imaadpcm // section by PercentCPU=xx. // // // Arguments: // HWND hwnd: // // Return (UINT): String identifier (IDS) of error message, or zero if // the call succeeded. // //--------------------------------------------------------------------------; UINT FNLOCAL configAutoConfig ( PDRIVERINSTANCE pdi, UINT *pnEncodeSetting, UINT *pnDecodeSetting ) { LPPCMWAVEFORMAT pwfPCM = NULL; LPIMAADPCMWAVEFORMAT pwfADPCM = NULL; LPACMDRVFORMATSUGGEST padfs = NULL; LPACMDRVSTREAMINSTANCE padsi = NULL; LPACMDRVSTREAMHEADER padsh = NULL; LPACMDRVSTREAMSIZE padss = NULL; PSTREAMINSTANCE psi = NULL; LPBYTE pBufPCM; LPBYTE pBufADPCM; DWORD cbPCM; DWORD cbADPCM; DWORD dwEncodeTime; DWORD dwDecodeTime; DWORD dwStartTime; DWORD dwMaxEncodeRate; DWORD dwMaxDecodeRate; UINT nConfig; UINT uIDS; HCURSOR hCursorSave; // // We divide by this! // ASSERT( 0 != pdi->nConfigPercentCPU ); uIDS = 0; // No errors yet - this is our "success" return. // // This function may take a while. Set hour glass cursor // hCursorSave = SetCursor(LoadCursor(NULL, IDC_WAIT)); // // Set up the input PCM wave format structure. // pwfPCM = (LPPCMWAVEFORMAT)GlobalAllocPtr( GPTR, sizeof(*pwfPCM) ); if( NULL == pwfPCM ) { uIDS = IDS_ERROR_NOMEM; goto errReturn; } pwfPCM->wf.wFormatTag = WAVE_FORMAT_PCM; // Mono 16-bit!!! pwfPCM->wf.nChannels = 1; pwfPCM->wf.nSamplesPerSec = 8000; pwfPCM->wf.nBlockAlign = 2; pwfPCM->wBitsPerSample = 16; pwfPCM->wf.nAvgBytesPerSec = pwfPCM->wf.nSamplesPerSec * pwfPCM->wf.nBlockAlign; // // Get this driver to suggest a format to convert to. Note: we may // want to constrain the suggestion partly, depending on the // capabilities of the codec. We should always choose the most // complex conversion if there are several possibilities. // padfs = (LPACMDRVFORMATSUGGEST)GlobalAllocPtr( GPTR, sizeof(*padfs) ); pwfADPCM = (LPIMAADPCMWAVEFORMAT)GlobalAllocPtr( GPTR, sizeof(*pwfADPCM) ); if( NULL == padfs || NULL == pwfADPCM ) { uIDS = IDS_ERROR_NOMEM; goto errReturn; } padfs->cbStruct = sizeof(*padfs); padfs->fdwSuggest = 0; // Default everything. padfs->pwfxSrc = (LPWAVEFORMATEX)pwfPCM; padfs->cbwfxSrc = sizeof(*pwfPCM); padfs->pwfxDst = (LPWAVEFORMATEX)pwfADPCM; padfs->cbwfxDst = sizeof(*pwfADPCM); (void)acmdFormatSuggest( pdi, padfs ); // This will always work, right? // // Set stream instance data. Note: we assume that the members that // we don't set here never actually get used. Make sure that this // is really true! // padsi = (LPACMDRVSTREAMINSTANCE)GlobalAllocPtr( GPTR, sizeof(*padsi) ); psi = (PSTREAMINSTANCE)LocalAlloc( LPTR, sizeof(*psi) ); if( NULL == padsi || NULL == psi ) { uIDS = IDS_ERROR_NOMEM; goto errReturn; } // Make sure that psi->fnConvert matches the PCM format in pwfPCM!!! psi->fnConvert = imaadpcmEncode4Bit_M16; psi->fdwConfig = pdi->fdwConfig; psi->nStepIndexL = 0; psi->nStepIndexR = 0; // Make sure that no other members of padsi are used!!! padsi->cbStruct = sizeof(*padsi); padsi->pwfxSrc = (LPWAVEFORMATEX)pwfPCM; padsi->pwfxDst = (LPWAVEFORMATEX)pwfADPCM; padsi->dwDriver = (DWORD_PTR)psi; // // Now, get the driver to tell us how much space is required for the // destination buffer. // cbPCM = IMAADPCM_CONFIGTESTTIME * pwfPCM->wf.nAvgBytesPerSec; padss = (LPACMDRVSTREAMSIZE)GlobalAllocPtr( GPTR, sizeof(*padss) ); if( NULL == padss ) { uIDS = IDS_ERROR_NOMEM; goto errReturn; } padss->cbStruct = sizeof(padss); padss->fdwSize = ACM_STREAMSIZEF_SOURCE; padss->cbSrcLength = cbPCM; (void)acmdStreamSize( padsi, padss ); // This will always work, right? // // Allocate source and destination buffers. Note that we specifically // don't zero-initialize them, so that we will get random PCM data in // the PCM buffer. // cbADPCM = padss->cbDstLength; pBufPCM = (LPBYTE)GlobalAllocPtr( GMEM_FIXED, (UINT)cbPCM ); pBufADPCM = (LPBYTE)GlobalAllocPtr( GMEM_FIXED, (UINT)cbADPCM ); if( NULL == pBufPCM || NULL == pBufADPCM ) { uIDS = IDS_ERROR_NOMEM; goto errReturn; } // // Now, tell the driver to convert our buffer and measure the time. // Note that we don't care what is in the source buffer, we only // care how long it takes. // padsh = (LPACMDRVSTREAMHEADER)GlobalAllocPtr( GPTR, sizeof(*padsh) ); if( NULL == padsh ) { uIDS = IDS_ERROR_NOMEM; goto errReturn; } // Make sure that no other members of padsh are used!!! padsh->cbStruct = sizeof(*padsh); padsh->pbSrc = pBufPCM; padsh->cbSrcLength = cbPCM; padsh->pbDst = pBufADPCM; padsh->cbDstLength = cbADPCM; padsh->fdwConvert = 0; // Should be 0 already, but... dwStartTime = timeGetTime(); (void)acmdStreamConvert( pdi, padsi, padsh ); // Won't fail?! dwEncodeTime = timeGetTime() - dwStartTime; // // Now, we have an encoded IMA ADPCM buffer. Tell the driver to // convert it back to PCM, measuring the time. First we reset the // size of the ADPCM buffer to correspond with the buffer returned // by the convert. Then we zero out our structure buffers and reset // them for the new conversion. Note: we assume that the PCM buffer // is already large enough to handle the conversion. // cbADPCM = padsh->cbDstLengthUsed; #ifdef WIN32 ZeroMemory( psi, sizeof(*psi) ); ZeroMemory( padsi, sizeof(*padsi) ); ZeroMemory( padsh, sizeof(*padsh) ); #else _fmemset( psi, 0, sizeof(*psi) ); _fmemset( padsi, 0, sizeof(*padsi) ); _fmemset( padsh, 0, sizeof(*padsh) ); #endif // Make sure that psi->fnConvert matches the format in pfwADPCM!!! psi->fnConvert = imaadpcmDecode4Bit_M16; psi->fdwConfig = pdi->fdwConfig; psi->nStepIndexL = 0; psi->nStepIndexR = 0; // Make sure that no other members of padsi are used!!! padsi->cbStruct = sizeof(*padsi); padsi->pwfxSrc = (LPWAVEFORMATEX)pwfADPCM; padsi->pwfxDst = (LPWAVEFORMATEX)pwfPCM; padsi->dwDriver = (DWORD_PTR)psi; // Make sure that no other members of padsh are used!!! padsh->cbStruct = sizeof(*padsh); padsh->pbSrc = pBufADPCM; padsh->cbSrcLength = cbADPCM; padsh->pbDst = pBufPCM; padsh->cbDstLength = cbPCM; padsh->fdwConvert = 0; // Should be 0 already, but... dwStartTime = timeGetTime(); (void)acmdStreamConvert( pdi, padsi, padsh ); // Won't fail?! dwDecodeTime = timeGetTime() - dwStartTime; // // Now, figure out the max encode and decode rates implied by the // times required by the conversions. // if( dwEncodeTime == 0 ) dwMaxEncodeRate = 0xFFFFFFFFL; else dwMaxEncodeRate = MulDiv32( pwfPCM->wf.nSamplesPerSec, 1000L * IMAADPCM_CONFIGTESTTIME, dwEncodeTime ) * pdi->nConfigPercentCPU / 100; if( dwDecodeTime == 0 ) dwMaxDecodeRate = 0xFFFFFFFFL; else dwMaxDecodeRate = MulDiv32( pwfPCM->wf.nSamplesPerSec, 1000L * IMAADPCM_CONFIGTESTTIME, dwDecodeTime ) * pdi->nConfigPercentCPU / 100; DPF(1,"dwEncodeTime=%d, dwMaxEncodeRate=%d", dwEncodeTime,dwMaxEncodeRate); DPF(1,"dwDecodeTime=%d, dwMaxDecodeRate=%d", dwDecodeTime,dwMaxDecodeRate); // // Now set the configuration based on these values. We scan the // gaRateListFormat[] array looking at the dwMonoRate to determine // the appropriate setting. // // Encode. // nConfig = 0; while( gaRateListFormat[nConfig].dwMonoRate < dwMaxEncodeRate && IMAADPCM_CONFIG_NUMSETTINGS > nConfig ) { nConfig++; } *pnEncodeSetting = nConfig - 1; // We went too far. // // Decode. // nConfig = 0; while( gaRateListFormat[nConfig].dwMonoRate < dwMaxDecodeRate && IMAADPCM_CONFIG_NUMSETTINGS > nConfig ) { nConfig++; } *pnDecodeSetting = nConfig - 1; // We went too far. // // Free structure allocations and exit. // // errReturn: if( NULL != pwfPCM ) GlobalFreePtr( pwfPCM ); if( NULL != pwfADPCM ) GlobalFreePtr( pwfADPCM ); if( NULL != padfs ) GlobalFreePtr( padfs ); if( NULL != padsi ) GlobalFreePtr( padsi ); if( NULL != padsh ) GlobalFreePtr( padsh ); if( NULL != padss ) GlobalFreePtr( padss ); if( NULL != psi ) LocalFree( (HLOCAL)psi ); SetCursor( hCursorSave ); return uIDS; } //==========================================================================; // // // // //==========================================================================; //--------------------------------------------------------------------------; // // INT_PTR acmdDlgProcConfigure // // Description: // This routine handles the configuration dialog box. // // Arguments: // HWND hwnd: // // UINT uMsg: // // WPARAM wParam: // // LPARAM lParam: // // Return (BOOL): // // // Note: In order to avoid using a static fHelpRunning flag which will // still be here after we exit, we allocate an fHelpRunning // variable in the DRIVERINSTANCE structure. This is purely to // avoid static variables (which force us to have a data segment // of 4K); the fHelpRunning is not used in any other procedures. // //--------------------------------------------------------------------------; INT_PTR FNWCALLBACK acmdDlgProcConfigure ( HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam ) { PDRIVERINSTANCE pdi; HWND hctrlEnc; HWND hctrlDec; UINT uCmdId; UINT u; int n; TCHAR szFormat[IMAADPCM_CONFIG_TEXTLEN]; TCHAR szOutput[IMAADPCM_CONFIG_TEXTLEN]; UINT nConfigMaxRTEncodeSetting; UINT nConfigMaxRTDecodeSetting; switch (uMsg) { case WM_INITDIALOG: pdi = (PDRIVERINSTANCE)(UINT_PTR)lParam; pdi->fHelpRunning = FALSE; // Used only in this procedure. #ifdef WIN4 // // This driver is marked Windows Subsystem version 3.5 in order // that it be compatible with Daytona - however, that means that // Chicago will think it is a Win 3.1 application and give it // Win 3.1 default colors. This makes the config dialog look // white, whereas the Chicago default uses 3DFACE. This code // (and the CTLCOLOR messages) sets the colors explicitly. // pdi->hbrDialog = CreateSolidBrush( GetSysColor(COLOR_3DFACE) ); #endif SetWindowLongPtr(hwnd, DWLP_USER, lParam); nConfigMaxRTEncodeSetting = pdi->nConfigMaxRTEncodeSetting; nConfigMaxRTDecodeSetting = pdi->nConfigMaxRTDecodeSetting; hctrlEnc = GetDlgItem(hwnd, IDC_COMBO_MAXRTENCODE); hctrlDec = GetDlgItem(hwnd, IDC_COMBO_MAXRTDECODE); for( u=0; uhinst, gaRateListFormat[u].idsFormat, szFormat, SIZEOF(szFormat) ); switch( gaRateListFormat[u].uFormatType ) { case CONFIG_RLF_NONUMBER: lstrcpy( szOutput, szFormat ); break; case CONFIG_RLF_MONOONLY: wsprintf( szOutput, szFormat, gaRateListFormat[u].dwMonoRate ); break; case CONFIG_RLF_STEREOONLY: wsprintf( szOutput, szFormat, gaRateListFormat[u].dwMonoRate / 2 ); break; case CONFIG_RLF_MONOSTEREO: wsprintf( szOutput, szFormat, gaRateListFormat[u].dwMonoRate, gaRateListFormat[u].dwMonoRate / 2 ); break; } ComboBox_AddString(hctrlEnc, szOutput); ComboBox_AddString(hctrlDec, szOutput); } ComboBox_SetCurSel( hctrlEnc, nConfigMaxRTEncodeSetting ); ComboBox_SetCurSel( hctrlDec, nConfigMaxRTDecodeSetting ); return (TRUE); case WM_DESTROY: pdi = (PDRIVERINSTANCE)GetWindowLongPtr(hwnd, DWLP_USER); if (pdi->fHelpRunning) { WinHelp(hwnd, gszHelpFilename, HELP_QUIT, 0L); } #ifdef WIN4 DeleteObject( pdi->hbrDialog ); #endif // // Let dialog box process this message // // return (FALSE); #ifdef WIN4 // // Handle CTLCOLOR messages to get the dialog boxes to the default // Chicago colors. See the INITDIALOG message, above. // case WM_CTLCOLORSTATIC: case WM_CTLCOLORDLG: case WM_CTLCOLORBTN: SetTextColor( (HDC)wParam, GetSysColor(COLOR_WINDOWTEXT) ); SetBkColor( (HDC)wParam, GetSysColor(COLOR_3DFACE) ); pdi = (PDRIVERINSTANCE)GetWindowLongPtr(hwnd, DWLP_USER); return (UINT_PTR)pdi->hbrDialog; #endif case WM_HELP: WinHelp(((LPHELPINFO)lParam)->hItemHandle, gszHelpFilename, HELP_WM_HELP, (ULONG_PTR)aKeyWordIds); return (TRUE); case WM_COMMAND: pdi = (PDRIVERINSTANCE)GetWindowLongPtr(hwnd, DWLP_USER); uCmdId = (UINT) wParam; switch (uCmdId) { case IDC_BTN_AUTOCONFIG: { UINT uErrorIDS; uErrorIDS = configAutoConfig( pdi, &nConfigMaxRTEncodeSetting, &nConfigMaxRTDecodeSetting ); if( 0==uErrorIDS ) { // // No error - set dialog box settings. // hctrlEnc = GetDlgItem( hwnd, IDC_COMBO_MAXRTENCODE ); ComboBox_SetCurSel( hctrlEnc, nConfigMaxRTEncodeSetting ); hctrlDec = GetDlgItem( hwnd, IDC_COMBO_MAXRTDECODE ); ComboBox_SetCurSel( hctrlDec, nConfigMaxRTDecodeSetting ); } else { // // Display error message. // TCHAR tstrErr[200]; TCHAR tstrErrTitle[200]; if (0 == LoadString(pdi->hinst, IDS_ERROR, tstrErrTitle, SIZEOF(tstrErrTitle))) break; if (0 == LoadString(pdi->hinst, uErrorIDS, tstrErr, SIZEOF(tstrErr))) break; MessageBox(hwnd, tstrErr, tstrErrTitle, MB_ICONEXCLAMATION | MB_OK); } } break; case IDOK: n = DRVCNF_CANCEL; // // RT Encode setting // hctrlEnc = GetDlgItem(hwnd, IDC_COMBO_MAXRTENCODE); nConfigMaxRTEncodeSetting = ComboBox_GetCurSel( hctrlEnc ); if (nConfigMaxRTEncodeSetting != pdi->nConfigMaxRTEncodeSetting) { pdi->nConfigMaxRTEncodeSetting = nConfigMaxRTEncodeSetting; n = DRVCNF_OK; } // // RT Decode setting // hctrlDec = GetDlgItem(hwnd, IDC_COMBO_MAXRTDECODE); nConfigMaxRTDecodeSetting = ComboBox_GetCurSel( hctrlDec ); if (nConfigMaxRTDecodeSetting != pdi->nConfigMaxRTDecodeSetting) { pdi->nConfigMaxRTDecodeSetting = nConfigMaxRTDecodeSetting; n = DRVCNF_OK; } // // If we changed something, write the data to the // registry. // if( DRVCNF_OK == n ) { configWriteConfiguration( pdi ); } EndDialog(hwnd, DRVCNF_OK); break; case IDCANCEL: EndDialog(hwnd, DRVCNF_CANCEL); break; case IDC_BTN_HELP: pdi->fHelpRunning = TRUE; WinHelp(hwnd, gszHelpFilename, HELP_CONTEXT, HELPCONTEXT_IMAADPCM); break; } return (TRUE); } return (FALSE); } // acmdDlgProcConfigure() //--------------------------------------------------------------------------; // // BOOL acmdDriverConfigInit // // Description: // This routine initializes the configuration parameters by reading them // from the registry. If there are no entries in the registry, this // codec auto-configures itself and writes the results to the registry. // If the auto-configure fails, or if we don't know our alias name, // then we set the configuration to default values. // // Arguments: // PDRIVERINSTANCE pdi: // // LPCTSTR pszAliasName: // // Return (BOOL): // // //--------------------------------------------------------------------------; BOOL FNGLOBAL acmdDriverConfigInit ( PDRIVERINSTANCE pdi, LPCTSTR pszAliasName ) { HKEY hkey; UINT nEncodeSetting; UINT nDecodeSetting; UINT uErrorIDS; // // If pszAliasName is NULL then just set all defaults // // if (NULL == pszAliasName) { DPF(2,"acmdDriverConfigInit: no alias name; using default settings."); configSetDefaults( pdi ); return (TRUE); } // // If we haven't got an open hkey, then open it. Note that this routine // may be called more than once; on the second time, we should not // re-open the key. // if( NULL == pdi->hkey ) { RegCreateKeyEx( IMAADPCM_CONFIG_DEFAULTKEY, gszMultimediaKey, 0, NULL, 0, KEY_CREATE_SUB_KEY, NULL, &hkey, NULL ); if( NULL != hkey ) { ASSERT( NULL != pszAliasName ); RegCreateKeyEx( hkey, pszAliasName, 0, NULL, 0, KEY_SET_VALUE | KEY_QUERY_VALUE | KEY_ENUMERATE_SUB_KEYS, NULL, &pdi->hkey, NULL ); RegCloseKey( hkey ); } } // // Read configuration data from registry. // if( NULL == pdi->hkey ) { configSetDefaults( pdi ); } else { pdi->nConfigMaxRTEncodeSetting = (UINT)dwReadRegistryDefault( pdi->hkey, (LPTSTR)gszMaxRTEncodeSetting, IMAADPCM_CONFIG_UNCONFIGURED ); pdi->nConfigMaxRTDecodeSetting = (UINT)dwReadRegistryDefault( pdi->hkey, (LPTSTR)gszMaxRTDecodeSetting, IMAADPCM_CONFIG_UNCONFIGURED ); pdi->nConfigPercentCPU = (UINT)dwReadRegistryDefault( pdi->hkey, (LPTSTR)gszPercentCPU, IMAADPCM_CONFIG_DEFAULT_PERCENTCPU ); // // Check that nConfigPercentCPU is a valid value. // if( pdi->nConfigPercentCPU <= 0 ) { pdi->nConfigPercentCPU = IMAADPCM_CONFIG_DEFAULT_PERCENTCPU; } } // // If either the encode or decode setting is out of range, then // we call the auto-configure routine and write out the results. // This should only happen the first time the codec is run. // if( IMAADPCM_CONFIG_NUMSETTINGS <= pdi->nConfigMaxRTEncodeSetting || IMAADPCM_CONFIG_NUMSETTINGS <= pdi->nConfigMaxRTDecodeSetting ) { DPF( 1, "acmdDriverConfigInit: performing initial auto-config." ); uErrorIDS = configAutoConfig( pdi, &nEncodeSetting, &nDecodeSetting ); if( 0 != uErrorIDS ) { // // Error in auto-config. Use defaults instead. // nEncodeSetting = IMAADPCM_CONFIG_DEFAULT_MAXRTENCODESETTING; nDecodeSetting = IMAADPCM_CONFIG_DEFAULT_MAXRTDECODESETTING; } pdi->nConfigMaxRTEncodeSetting = nEncodeSetting; pdi->nConfigMaxRTDecodeSetting = nDecodeSetting; // // Always write the results to the registry, even if we hit an // error, so we won't hit the automatic auto-config next // time we run. One failure is enough! // configWriteConfiguration( pdi ); } return (TRUE); } // acmdDriverConfigInit() #endif // IMAADPCM_USECONFIG