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windows-nt/Source/XPSP1/NT/multimedia/media/msacm/imaadpcm/config.c

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2020-09-26 03:20:57 -05:00
//==========================================================================;
//
// 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 <windows.h>
#include <windowsx.h>
#include <mmsystem.h>
#include <mmreg.h>
#include <msacm.h>
#include <msacmdrv.h>
#include "muldiv32.h"
#include "codec.h"
#include "imaadpcm.h"
#include "debug.h"
#ifdef WIN32
#include <tchar.h>
#else
#define _tcstoul strtoul
#define _tcsncpy _fstrncpy
#endif
#include <string.h>
#include <stdlib.h>
#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; u<IMAADPCM_CONFIG_NUMSETTINGS; u++ )
{
LoadString( pdi->hinst, 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
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