base/applications/sndvol32/sndvol32.c

   1 /*
   2  * ReactOS Sound Volume Control
   3  * Copyright (C) 2004-2005 Thomas Weidenmueller
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2.1 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  18  */
  19 /*
  20  * COPYRIGHT:   See COPYING in the top level directory
  21  * PROJECT:     ReactOS Sound Volume Control
  22  * FILE:        base/applications/sndvol32/sndvol32.c
  23  * PROGRAMMERS: Thomas Weidenmueller <w3seek@reactos.com>
  24  */
  25
  26 #include "sndvol32.h"
  27
  28 #include <shellapi.h>
  29
  30 HINSTANCE hAppInstance;
  31 ATOM MainWindowClass;
  32 HWND hMainWnd;
  33 HANDLE hAppHeap;
  34 LPTSTR lpAppTitle;
  35 PREFERENCES_CONTEXT Preferences;
  36
  37 #define GetDialogData(hwndDlg, type) \
  38     ( P##type )GetWindowLongPtr((hwndDlg), DWLP_USER)
  39 #define GetWindowData(hwnd, type) \
  40     ( P##type )GetWindowLongPtr((hwnd), GWL_USERDATA)
  41
  42 /******************************************************************************/
  43
  44
  45
  46 typedef struct _PREFERENCES_FILL_DEVICES
  47 {
  48     PPREFERENCES_CONTEXT PrefContext;
  49     HWND hComboBox;
  50     UINT Selected;
  51 } PREFERENCES_FILL_DEVICES, *PPREFERENCES_FILL_DEVICES;
  52
  53 static BOOL CALLBACK
  54 FillDeviceComboBox(PSND_MIXER Mixer,
  55                    UINT Id,
  56                    LPCTSTR ProductName,
  57                    PVOID Context)
  58 {
  59     LRESULT lres;
  60     PPREFERENCES_FILL_DEVICES FillContext = (PPREFERENCES_FILL_DEVICES)Context;
  61
  62     UNREFERENCED_PARAMETER(Mixer);
  63
  64     lres = SendMessage(FillContext->hComboBox,
  65                        CB_ADDSTRING,
  66                        0,
  67                        (LPARAM)ProductName);
  68     if (lres != CB_ERR)
  69     {
  70         /* save the index so we don't screw stuff when the combobox is sorted... */
  71         SendMessage(FillContext->hComboBox,
  72                     CB_SETITEMDATA,
  73                     (WPARAM)lres,
  74                     Id);
  75
  76         if (Id == FillContext->Selected)
  77         {
  78             SendMessage(FillContext->hComboBox,
  79                         CB_SETCURSEL,
  80                         (WPARAM)lres,
  81                         0);
  82         }
  83     }
  84
  85     return TRUE;
  86 }
  87
  88 static BOOL CALLBACK
  89 PrefDlgAddLine(PSND_MIXER Mixer,
  90                LPMIXERLINE Line,
  91                UINT DisplayControls,
  92                PVOID Context)
  93 {
  94     PPREFERENCES_CONTEXT PrefContext = (PPREFERENCES_CONTEXT)Context;
  95
  96     UNREFERENCED_PARAMETER(Mixer);
  97     UNREFERENCED_PARAMETER(DisplayControls);
  98
  99     switch (Line->dwComponentType)
 100     {
 101         case MIXERLINE_COMPONENTTYPE_DST_SPEAKERS:
 102             if (PrefContext->PlaybackID == (DWORD)-1)
 103             {
 104                 PrefContext->PlaybackID = Line->dwLineID;
 105
 106                 if (PrefContext->SelectedLine == (DWORD)-1)
 107                 {
 108                     PrefContext->SelectedLine = Line->dwLineID;
 109                 }
 110             }
 111             else
 112                 goto AddToOthersLines;
 113
 114             break;
 115
 116         case MIXERLINE_COMPONENTTYPE_DST_WAVEIN:
 117             if (PrefContext->RecordingID == (DWORD)-1)
 118             {
 119                 PrefContext->RecordingID = Line->dwLineID;
 120
 121                 if (PrefContext->SelectedLine == (DWORD)-1)
 122                 {
 123                     PrefContext->SelectedLine = Line->dwLineID;
 124                 }
 125             }
 126             else
 127                 goto AddToOthersLines;
 128
 129             break;
 130
 131         default:
 132         {
 133             LRESULT lres;
 134             HWND hwndCbOthers;
 135
 136             if (PrefContext->SelectedLine == (DWORD)-1)
 137             {
 138                 PrefContext->SelectedLine = Line->dwLineID;
 139             }
 140
 141 AddToOthersLines:
 142             hwndCbOthers = GetDlgItem(PrefContext->hwndDlg,
 143                                       IDC_LINE);
 144
 145             lres = SendMessage(hwndCbOthers,
 146                                CB_ADDSTRING,
 147                                0,
 148                                (LPARAM)Line->szName);
 149             if (lres != CB_ERR)
 150             {
 151                 SendMessage(hwndCbOthers,
 152                             CB_SETITEMDATA,
 153                             (WPARAM)lres,
 154                             Line->dwLineID);
 155
 156                 PrefContext->OtherLines++;
 157             }
 158             break;
 159         }
 160     }
 161
 162     return TRUE;
 163 }
 164
 165 static BOOL CALLBACK
 166 PrefDlgAddConnection(PSND_MIXER Mixer,
 167                      DWORD LineID,
 168                      LPMIXERLINE Line,
 169                      PVOID Context)
 170 {
 171     PPREFERENCES_CONTEXT PrefContext = (PPREFERENCES_CONTEXT)Context;
 172     HWND hwndControls;
 173     LVITEM lvi;
 174     UINT i;
 175
 176     UNREFERENCED_PARAMETER(Mixer);
 177     UNREFERENCED_PARAMETER(LineID);
 178
 179     if (Line->cControls != 0)
 180     {
 181         hwndControls = GetDlgItem(PrefContext->hwndDlg,
 182                                   IDC_CONTROLS);
 183
 184         lvi.mask = LVIF_TEXT | LVIF_PARAM;
 185         lvi.iItem = PrefContext->tmp++;
 186         lvi.iSubItem = 0;
 187         lvi.pszText = Line->szName;
 188         lvi.lParam = (LPARAM)Line->dwSource;
 189
 190         i = SendMessage(hwndControls,
 191                         LVM_INSERTITEM,
 192                         0,
 193                         (LPARAM)&lvi);
 194         if (i != (UINT)-1)
 195         {
 196             TCHAR LineName[MIXER_LONG_NAME_CHARS];
 197             DWORD Flags;
 198             BOOL SelLine = FALSE;
 199
 200             if (SndMixerGetLineName(PrefContext->Mixer,
 201                                     PrefContext->SelectedLine,
 202                                     LineName,
 203                                     MIXER_LONG_NAME_CHARS,
 204                                     TRUE) == -1)
 205             {
 206                 LineName[0] = TEXT('\0');
 207             }
 208
 209             if (ReadLineConfig(PrefContext->DeviceName,
 210                                LineName,
 211                                Line->szName,
 212                                &Flags))
 213             {
 214                 if (Flags != 0x4)
 215                 {
 216                     SelLine = TRUE;
 217                 }
 218             }
 219
 220             ListView_SetCheckState(hwndControls,
 221                                    i,
 222                                    SelLine);
 223         }
 224     }
 225
 226     return TRUE;
 227 }
 228
 229 static VOID
 230 UpdatePrefDlgControls(PPREFERENCES_CONTEXT Context,
 231                       DWORD LineID)
 232 {
 233     INT OldID, MixerID = 0;
 234     INT DeviceCbIndex;
 235
 236     /* select the mixer */
 237     DeviceCbIndex = SendDlgItemMessage(Context->hwndDlg,
 238                                        IDC_MIXERDEVICE,
 239                                        CB_GETCURSEL,
 240                                        0,
 241                                        0);
 242     if (DeviceCbIndex != CB_ERR)
 243     {
 244         MixerID = SendDlgItemMessage(Context->hwndDlg,
 245                                      IDC_MIXERDEVICE,
 246                                      CB_GETITEMDATA,
 247                                      DeviceCbIndex,
 248                                      0);
 249         if (MixerID == CB_ERR)
 250         {
 251             MixerID = 0;
 252         }
 253     }
 254
 255     OldID = Context->Selected;
 256     if (MixerID != OldID &&
 257         SndMixerSelect(Context->Mixer,
 258                        MixerID))
 259     {
 260         Context->Selected = SndMixerGetSelection(Context->Mixer);
 261
 262         /* update the controls */
 263         Context->PlaybackID = (DWORD)-1;
 264         Context->RecordingID = (DWORD)-1;
 265         Context->OtherLines = 0;
 266         Context->SelectedLine = (DWORD)-1;
 267
 268         SndMixerGetProductName(Context->Mixer,
 269                                Context->DeviceName,
 270                                sizeof(Context->DeviceName) / sizeof(Context->DeviceName[0]));
 271
 272         if (SndMixerEnumLines(Context->Mixer,
 273                               PrefDlgAddLine,
 274                               Context))
 275         {
 276             UINT SelBox = 0;
 277
 278             /* enable/disable controls and make default selection */
 279             EnableWindow(GetDlgItem(Context->hwndDlg,
 280                                     IDC_PLAYBACK),
 281                          Context->PlaybackID != (DWORD)-1);
 282             CheckDlgButton(Context->hwndDlg,
 283                            IDC_PLAYBACK,
 284                            (Context->PlaybackID != (DWORD)-1 && SelBox++ == 0) ?
 285                                BST_CHECKED : BST_UNCHECKED);
 286
 287             EnableWindow(GetDlgItem(Context->hwndDlg,
 288                                     IDC_RECORDING),
 289                          Context->RecordingID != (DWORD)-1);
 290             CheckDlgButton(Context->hwndDlg,
 291                            IDC_RECORDING,
 292                            (Context->RecordingID != (DWORD)-1 && SelBox++ == 0) ?
 293                                BST_CHECKED : BST_UNCHECKED);
 294
 295             if (Context->OtherLines != 0)
 296             {
 297                 /* select the first item in the other lines combo box by default */
 298                 SendDlgItemMessage(Context->hwndDlg,
 299                                    IDC_LINE,
 300                                    CB_SETCURSEL,
 301                                    0,
 302                                    0);
 303             }
 304             EnableWindow(GetDlgItem(Context->hwndDlg,
 305                                     IDC_LINE),
 306                          FALSE);
 307             EnableWindow(GetDlgItem(Context->hwndDlg,
 308                                     IDC_OTHER),
 309                          Context->OtherLines != 0);
 310             CheckDlgButton(Context->hwndDlg,
 311                            IDC_LINE,
 312                            (Context->OtherLines != 0 && SelBox++ == 0) ?
 313                                BST_CHECKED : BST_UNCHECKED);
 314
 315             /* disable the OK button if the device doesn't have any lines */
 316             EnableWindow(GetDlgItem(Context->hwndDlg,
 317                                     IDOK),
 318                          Context->PlaybackID != (DWORD)-1 ||
 319                          Context->RecordingID != (DWORD)-1 ||
 320                          Context->OtherLines != 0);
 321
 322             LineID = Context->SelectedLine;
 323         }
 324     }
 325
 326     /* update the line sources list */
 327     if ((MixerID != OldID && Context->SelectedLine != (DWORD)-1) ||
 328         (Context->SelectedLine != LineID && LineID != (DWORD)-1))
 329     {
 330         Context->SelectedLine = LineID;
 331
 332         (void)ListView_DeleteAllItems(GetDlgItem(Context->hwndDlg,
 333                                       IDC_CONTROLS));
 334
 335         Context->tmp = 0;
 336         SndMixerEnumConnections(Context->Mixer,
 337                                 LineID,
 338                                 PrefDlgAddConnection,
 339                                 Context);
 340     }
 341 }
 342
 343 static
 344 VOID
 345 WriteLineSettings(PPREFERENCES_CONTEXT Context, HWND hwndDlg)
 346 {
 347     HWND hwndControls;
 348     INT Count, Index;
 349     WCHAR LineName[MIXER_LONG_NAME_CHARS];
 350     WCHAR DestinationName[MIXER_LONG_NAME_CHARS];
 351     DWORD Flags;
 352     PSNDVOL_REG_LINESTATE LineStates;
 353
 354     /* get list view */
 355     hwndControls = GetDlgItem(hwndDlg, IDC_CONTROLS);
 356
 357     /* get list item count */
 358     Count = ListView_GetItemCount(hwndControls);
 359
 360     /* sanity check */
 361     assert(Count);
 362
 363     if (SndMixerGetLineName(Context->Mixer, Context->SelectedLine, DestinationName, MIXER_LONG_NAME_CHARS, TRUE) == -1)
 364     {
 365         /* failed to get destination line name */
 366         return;
 367     }
 368
 369     /* allocate line states array */
 370     LineStates = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(SNDVOL_REG_LINESTATE) * Count);
 371     if (LineStates == NULL)
 372     {
 373         /* failed to allocate line states array */
 374         return;
 375     }
 376
 377
 378     for(Index = 0; Index < Count; Index++)
 379     {
 380         /* set to empty */
 381         LineName[0] = L'\0';
 382
 383         /* get item text */
 384         ListView_GetItemText(hwndControls, Index, 0, LineName, MIXER_LONG_NAME_CHARS);
 385
 386         /* make sure it is null terminated */
 387         LineName[MIXER_LONG_NAME_CHARS-1] = L'\0';
 388
 389         /* get check state */
 390         Flags = (ListView_GetCheckState(hwndControls, Index) == 0 ? 0x4 : 0);
 391
 392         /* copy line name */
 393         wcscpy(LineStates[Index].LineName, LineName);
 394
 395         /* store flags */
 396         LineStates[Index].Flags = Flags;
 397     }
 398
 399     /* now write the line config */
 400     WriteLineConfig(Context->DeviceName, DestinationName, LineStates, sizeof(SNDVOL_REG_LINESTATE) * Count);
 401
 402     /* free line states */
 403     HeapFree(GetProcessHeap(), 0, LineStates);
 404 }
 405
 406 static INT_PTR CALLBACK
 407 DlgPreferencesProc(HWND hwndDlg,
 408                    UINT uMsg,
 409                    WPARAM wParam,
 410                    LPARAM lParam)
 411 {
 412     PPREFERENCES_CONTEXT Context;
 413
 414     switch (uMsg)
 415     {
 416         case WM_COMMAND:
 417         {
 418             Context = GetDialogData(hwndDlg,
 419                                     PREFERENCES_CONTEXT);
 420             switch (LOWORD(wParam))
 421             {
 422                 case IDC_MIXERDEVICE:
 423                 {
 424                     if (HIWORD(wParam) == CBN_SELCHANGE)
 425                     {
 426                         UpdatePrefDlgControls(Context,
 427                                               (DWORD)-1);
 428                     }
 429                     break;
 430                 }
 431
 432                 case IDC_LINE:
 433                 {
 434                     if (HIWORD(wParam) == CBN_SELCHANGE)
 435                     {
 436                         INT LineID;
 437                         INT Index;
 438
 439                         Index = SendDlgItemMessage(hwndDlg,
 440                                                    IDC_LINE,
 441                                                    CB_GETCURSEL,
 442                                                    0,
 443                                                    0);
 444                         if (Index != CB_ERR)
 445                         {
 446                             LineID = SendDlgItemMessage(hwndDlg,
 447                                                         IDC_LINE,
 448                                                         CB_GETITEMDATA,
 449                                                         Index,
 450                                                         0);
 451                             if (LineID != CB_ERR)
 452                             {
 453                                 UpdatePrefDlgControls(Context,
 454                                                       LineID);
 455                             }
 456                         }
 457                     }
 458                     break;
 459                 }
 460
 461                 case IDC_PLAYBACK:
 462                 {
 463                     UpdatePrefDlgControls(Context,
 464                                           Context->PlaybackID);
 465                     EnableWindow(GetDlgItem(hwndDlg,
 466                                             IDC_LINE),
 467                                  FALSE);
 468                     break;
 469                 }
 470
 471                 case IDC_RECORDING:
 472                 {
 473                     UpdatePrefDlgControls(Context,
 474                                           Context->RecordingID);
 475                     EnableWindow(GetDlgItem(hwndDlg,
 476                                             IDC_LINE),
 477                                  FALSE);
 478                     break;
 479                 }
 480
 481                 case IDC_OTHER:
 482                 {
 483                     INT LineCbIndex;
 484                     INT LineID;
 485
 486                     EnableWindow(GetDlgItem(hwndDlg,
 487                                             IDC_LINE),
 488                                  TRUE);
 489
 490                     LineCbIndex = SendDlgItemMessage(hwndDlg,
 491                                                      IDC_LINE,
 492                                                      CB_GETCURSEL,
 493                                                      0,
 494                                                      0);
 495                     if (LineCbIndex != CB_ERR)
 496                     {
 497                         LineID = SendDlgItemMessage(hwndDlg,
 498                                                     IDC_LINE,
 499                                                     CB_GETITEMDATA,
 500                                                     LineCbIndex,
 501                                                     0);
 502                         if (LineID != CB_ERR)
 503                         {
 504                             UpdatePrefDlgControls(Context,
 505                                                   LineID);
 506                         }
 507                     }
 508                     break;
 509                 }
 510
 511                 case IDOK:
 512                 {
 513                     /* write line settings */
 514                     WriteLineSettings(Context, hwndDlg);
 515
 516                     /* fall through */
 517                 }
 518                 case IDCANCEL:
 519                 {
 520                     EndDialog(hwndDlg,
 521                               LOWORD(wParam));
 522                     break;
 523                 }
 524             }
 525             break;
 526         }
 527
 528         case WM_INITDIALOG:
 529         {
 530             PREFERENCES_FILL_DEVICES FillDevContext;
 531             LVCOLUMN lvc;
 532             RECT rcClient;
 533             HWND hwndControls;
 534
 535             SetWindowLongPtr(hwndDlg,
 536                              DWLP_USER,
 537                              (LONG_PTR)lParam);
 538             Context = (PPREFERENCES_CONTEXT)((LONG_PTR)lParam);
 539             Context->hwndDlg = hwndDlg;
 540             Context->Mixer = SndMixerCreate(hwndDlg, Context->MixerWindow->MixerId);
 541             Context->Selected = (UINT)-1;
 542
 543             FillDevContext.PrefContext = Context;
 544             FillDevContext.hComboBox = GetDlgItem(hwndDlg,
 545                                                   IDC_MIXERDEVICE);
 546             FillDevContext.Selected = SndMixerGetSelection(Context->Mixer);
 547             SndMixerEnumProducts(Context->Mixer,
 548                                  FillDeviceComboBox,
 549                                  &FillDevContext);
 550
 551             /* initialize the list view control */
 552             hwndControls = GetDlgItem(hwndDlg,
 553                                       IDC_CONTROLS);
 554             (void)ListView_SetExtendedListViewStyle(hwndControls,
 555                                                     LVS_EX_CHECKBOXES);
 556
 557             GetClientRect(hwndControls,
 558                           &rcClient);
 559             lvc.mask = LVCF_TEXT | LVCF_WIDTH;
 560             lvc.pszText = TEXT("");
 561             lvc.cx = rcClient.right;
 562             SendMessage(hwndControls,
 563                         LVM_INSERTCOLUMN,
 564                         0,
 565                         (LPARAM)&lvc);
 566
 567             /* update all controls */
 568             UpdatePrefDlgControls(Context,
 569                                   (DWORD)Context->SelectedLine);
 570             return TRUE;
 571         }
 572
 573         case WM_CLOSE:
 574         {
 575             EndDialog(hwndDlg,
 576                       IDCANCEL);
 577             break;
 578         }
 579
 580         case WM_SYSCOLORCHANGE:
 581         {
 582             HWND hwndControls;
 583
 584             /* Forward WM_SYSCOLORCHANGE */
 585             hwndControls = GetDlgItem(hwndDlg, IDC_CONTROLS);
 586             SendMessage(hwndControls, WM_SYSCOLORCHANGE, 0, 0);
 587             break;
 588         }
 589     }
 590
 591     return 0;
 592 }
 593
 594
 595 /******************************************************************************/
 596
 597 static VOID
 598 DeleteMixerWindowControls(PMIXER_WINDOW MixerWindow)
 599 {
 600     DWORD Index;
 601
 602     for(Index = 0; Index < MixerWindow->WindowCount; Index++)
 603     {
 604         /* destroys the window */
 605         DestroyWindow(MixerWindow->Window[Index]);
 606     }
 607
 608     /* free memory */
 609     HeapFree(GetProcessHeap(), 0, MixerWindow->Window);
 610
 611     /* set to null */
 612     MixerWindow->Window = NULL;
 613     MixerWindow->WindowCount = 0;
 614 }
 615
 616 static BOOL
 617 RebuildMixerWindowControls(PPREFERENCES_CONTEXT PrefContext)
 618 {
 619     /* delete existing mixer controls */
 620     DeleteMixerWindowControls(PrefContext->MixerWindow);
 621
 622     /* load new mixer controls */
 623     LoadDialogCtrls(PrefContext);
 624
 625     return TRUE;
 626 }
 627
 628 static
 629 BOOL
 630 CALLBACK
 631 SetVolumeCallback(PSND_MIXER Mixer, DWORD LineID, LPMIXERLINE Line, PVOID Ctx)
 632 {
 633     UINT ControlCount = 0, Index;
 634     LPMIXERCONTROL Control = NULL;
 635     MIXERCONTROLDETAILS_UNSIGNED uDetails;
 636     MIXERCONTROLDETAILS_BOOLEAN bDetails;
 637     PSET_VOLUME_CONTEXT Context = (PSET_VOLUME_CONTEXT)Ctx;
 638
 639     /* check if the line name is equal */
 640     if (wcsicmp(Line->szName, Context->LineName))
 641     {
 642         /* it is not */
 643         return TRUE;
 644     }
 645
 646     /* query controls */
 647     if (SndMixerQueryControls(Mixer, &ControlCount, Line, &Control) == FALSE)
 648     {
 649         /* failed to query for controls */
 650         return FALSE;
 651     }
 652
 653     /* now go through all controls and compare control ids */
 654     for (Index = 0; Index < ControlCount; Index++)
 655     {
 656         if (Context->bVertical)
 657         {
 658             if ((Control[Index].dwControlType & MIXERCONTROL_CT_CLASS_MASK) == MIXERCONTROL_CT_CLASS_FADER)
 659             {
 660                 DWORD Step = (Control[Index].Bounds.dwMaximum - Control[Index].Bounds.dwMinimum) / (VOLUME_MAX - VOLUME_MIN);
 661
 662                 /* set up details */
 663                 uDetails.dwValue = ((VOLUME_MAX - Context->SliderPos) * Step) + Control[Index].Bounds.dwMinimum;
 664
 665                 /* set volume */
 666                 SndMixerSetVolumeControlDetails(Preferences.MixerWindow->Mixer, Control[Index].dwControlID, 1, sizeof(MIXERCONTROLDETAILS_UNSIGNED), (LPVOID)&uDetails);
 667
 668                 /* done */
 669                 break;
 670             }
 671         }
 672         else if (Context->bSwitch)
 673         {
 674             if ((Control[Index].dwControlType & MIXERCONTROL_CT_CLASS_MASK) == MIXERCONTROL_CT_CLASS_SWITCH)
 675             {
 676                 /* set up details */
 677                 bDetails.fValue = Context->SliderPos;
 678
 679                 /* set volume */
 680                 SndMixerSetVolumeControlDetails(Preferences.MixerWindow->Mixer, Control[Index].dwControlID, 1, sizeof(MIXERCONTROLDETAILS_BOOLEAN), (LPVOID)&bDetails);
 681
 682                 /* done */
 683                 break;
 684             }
 685         }
 686         else
 687         {
 688             /* FIXME: implement left - right channel switch support */
 689             assert(0);
 690         }
 691     }
 692
 693     /* free controls */
 694     HeapFree(GetProcessHeap(), 0, Control);
 695
 696
 697     /* done */
 698     return TRUE;
 699 }
 700
 701 static
 702 BOOL
 703 CALLBACK
 704 MixerControlChangeCallback(PSND_MIXER Mixer, DWORD LineID, LPMIXERLINE Line, PVOID Context)
 705 {
 706     PMIXERCONTROLDETAILS_UNSIGNED pVolumeDetails = NULL;
 707     UINT ControlCount = 0, Index;
 708     LPMIXERCONTROL Control = NULL;
 709
 710     /* check if the line has controls */
 711     if (Line->cControls == 0)
 712     {
 713         /* no controls */
 714         return TRUE;
 715     }
 716
 717     /* query controls */
 718     if (SndMixerQueryControls(Mixer, &ControlCount, Line, &Control) == FALSE)
 719     {
 720         /* failed to query for controls */
 721         return FALSE;
 722     }
 723
 724     pVolumeDetails = HeapAlloc(GetProcessHeap(),
 725                                0,
 726                                Line->cChannels * sizeof(MIXERCONTROLDETAILS_UNSIGNED));
 727     if (pVolumeDetails == NULL)
 728         goto done;
 729
 730     /* now go through all controls and compare control ids */
 731     for (Index = 0; Index < ControlCount; Index++)
 732     {
 733         if (Control[Index].dwControlID == PtrToUlong(Context))
 734         {
 735             if ((Control[Index].dwControlType & MIXERCONTROL_CT_CLASS_MASK) == MIXERCONTROL_CT_CLASS_SWITCH)
 736             {
 737                 MIXERCONTROLDETAILS_BOOLEAN Details;
 738
 739                 /* get volume control details */
 740                 if (SndMixerGetVolumeControlDetails(Preferences.MixerWindow->Mixer, Control[Index].dwControlID, 1, sizeof(MIXERCONTROLDETAILS_BOOLEAN), (LPVOID)&Details) != -1)
 741                 {
 742                     /* update dialog control */
 743                     UpdateDialogLineSwitchControl(&Preferences, Line, Details.fValue);
 744                 }
 745             }
 746             else if ((Control[Index].dwControlType & MIXERCONTROL_CT_CLASS_MASK) == MIXERCONTROL_CT_CLASS_FADER)
 747             {
 748                 /* get volume control details */
 749                 if (SndMixerGetVolumeControlDetails(Preferences.MixerWindow->Mixer, Control[Index].dwControlID, Line->cChannels, sizeof(MIXERCONTROLDETAILS_UNSIGNED), (LPVOID)pVolumeDetails) != -1)
 750                 {
 751                     /* update dialog control */
 752                     DWORD volumePosition, volumeStep, maxVolume, i;
 753                     DWORD balancePosition, balanceStep;
 754
 755                     volumeStep = (Control[Index].Bounds.dwMaximum - Control[Index].Bounds.dwMinimum) / (VOLUME_MAX - VOLUME_MIN);
 756
 757                     maxVolume = 0;
 758                     for (i = 0; i < Line->cChannels; i++)
 759                     {
 760                         if (pVolumeDetails[i].dwValue > maxVolume)
 761                             maxVolume = pVolumeDetails[i].dwValue;
 762                     }
 763
 764                     volumePosition = (maxVolume - Control[Index].Bounds.dwMinimum) / volumeStep;
 765
 766                     if (Line->cChannels == 1)
 767                     {
 768                         balancePosition = BALANCE_CENTER;
 769                     }
 770                     else if (Line->cChannels == 2)
 771                     {
 772                         if (pVolumeDetails[0].dwValue == pVolumeDetails[1].dwValue)
 773                         {
 774                             balancePosition = BALANCE_CENTER;
 775                         }
 776                         else if (pVolumeDetails[0].dwValue == Control[Index].Bounds.dwMinimum)
 777                         {
 778                             balancePosition = BALANCE_RIGHT;
 779                         }
 780                         else if (pVolumeDetails[1].dwValue == Control[Index].Bounds.dwMinimum)
 781                         {
 782                             balancePosition = BALANCE_LEFT;
 783                         }
 784                         else
 785                         {
 786                             balanceStep = (maxVolume - Control[Index].Bounds.dwMinimum) / (BALANCE_STEPS / 2);
 787
 788                             if (pVolumeDetails[0].dwValue < pVolumeDetails[1].dwValue)
 789                             {
 790                                 balancePosition = (pVolumeDetails[0].dwValue - Control[Index].Bounds.dwMinimum) / balanceStep;
 791                                 balancePosition = BALANCE_RIGHT - balancePosition;
 792                             }
 793                             else if (pVolumeDetails[1].dwValue < pVolumeDetails[0].dwValue)
 794                             {
 795                                 balancePosition = (pVolumeDetails[1].dwValue - Control[Index].Bounds.dwMinimum) / balanceStep;
 796                                 balancePosition = BALANCE_LEFT + balancePosition;
 797                             }
 798                         }
 799                     }
 800
 801                     /* Update the volume control slider */
 802                     UpdateDialogLineSliderControl(&Preferences, Line, IDC_LINE_SLIDER_VERT, VOLUME_MAX - volumePosition);
 803
 804                     /* Update the balance control slider */
 805                     UpdateDialogLineSliderControl(&Preferences, Line, IDC_LINE_SLIDER_HORZ, balancePosition);
 806                 }
 807             }
 808             break;
 809         }
 810     }
 811
 812 done:
 813     /* Free the volume details */
 814     if (pVolumeDetails)
 815         HeapFree(GetProcessHeap(), 0, pVolumeDetails);
 816
 817     /* free controls */
 818     HeapFree(GetProcessHeap(), 0, Control);
 819
 820     /* done */
 821     return TRUE;
 822 }
 823
 824
 825 static LRESULT CALLBACK
 826 MainWindowProc(HWND hwnd,
 827                UINT uMsg,
 828                WPARAM wParam,
 829                LPARAM lParam)
 830 {
 831     PMIXER_WINDOW MixerWindow;
 832     DWORD CtrlID, LineOffset;
 833     LRESULT Result = 0;
 834     SET_VOLUME_CONTEXT Context;
 835
 836     switch (uMsg)
 837     {
 838         case WM_COMMAND:
 839         {
 840             MixerWindow = GetWindowData(hwnd,
 841                                         MIXER_WINDOW);
 842
 843             switch (LOWORD(wParam))
 844             {
 845                 case IDC_PROPERTIES:
 846                 {
 847                     PREFERENCES_CONTEXT Pref;
 848
 849                     Pref.MixerWindow = MixerWindow;
 850                     Pref.Mixer = NULL;
 851                     Pref.SelectedLine = Preferences.SelectedLine;
 852
 853                     if (DialogBoxParam(hAppInstance,
 854                                        MAKEINTRESOURCE(IDD_PREFERENCES),
 855                                        hwnd,
 856                                        DlgPreferencesProc,
 857                                        (LPARAM)&Pref) == IDOK)
 858                     {
 859                         /* update window */
 860                         TCHAR szProduct[MAXPNAMELEN];
 861
 862                         /* get mixer product name */
 863                         if (SndMixerGetProductName(Pref.Mixer,
 864                                                    szProduct,
 865                                                    sizeof(szProduct) / sizeof(szProduct[0])) == -1)
 866                         {
 867                             /* failed to get name */
 868                             szProduct[0] = L'\0';
 869                         }
 870                         else
 871                         {
 872                             /* copy product */
 873                             wcscpy(Preferences.DeviceName, szProduct);
 874                         }
 875
 876                         /* destroy old status bar */
 877                         if (MixerWindow->Mode == NORMAL_MODE)
 878                             DestroyWindow(MixerWindow->hStatusBar);
 879
 880                         /* update details */
 881                         Preferences.SelectedLine = Pref.SelectedLine;
 882
 883                         /* destroy old mixer */
 884                         SndMixerDestroy(Preferences.MixerWindow->Mixer);
 885
 886                         /* use new selected mixer */
 887                         Preferences.MixerWindow->Mixer = Pref.Mixer;
 888
 889                         /* rebuild dialog controls */
 890                         RebuildMixerWindowControls(&Preferences);
 891
 892                         /* create status window */
 893                         if (MixerWindow->Mode == NORMAL_MODE)
 894                         {
 895                             MixerWindow->hStatusBar = CreateStatusWindow(WS_VISIBLE | WS_CHILD | WS_CLIPSIBLINGS,
 896                                                                          NULL,
 897                                                                          hwnd,
 898                                                                          0);
 899                             if (MixerWindow->hStatusBar)
 900                             {
 901                                 /* Set status bar */
 902                                 SendMessage(MixerWindow->hStatusBar,
 903                                     WM_SETTEXT,
 904                                     0,
 905                                     (LPARAM)szProduct);
 906                             }
 907                         }
 908                     }
 909                     break;
 910                 }
 911
 912                 case IDC_EXIT:
 913                 {
 914                     PostQuitMessage(0);
 915                     break;
 916                 }
 917
 918                 case IDC_ABOUT:
 919                 {
 920                     HICON hAppIcon = (HICON)GetClassLongPtrW(hwnd,
 921                                                              GCLP_HICON);
 922                     ShellAbout(hwnd,
 923                                lpAppTitle,
 924                                NULL,
 925                                hAppIcon);
 926                     break;
 927                 }
 928
 929                 default:
 930                 {
 931                     /* get button id */
 932                     CtrlID = LOWORD(wParam);
 933
 934                     /* check if the message is from the line switch */
 935                     if (HIWORD(wParam) == BN_CLICKED && (CtrlID % IDC_LINE_SWITCH == 0))
 936                     {
 937                         /* compute line offset */
 938                         LineOffset = CtrlID / IDC_LINE_SWITCH;
 939
 940                         /* compute window id of line name static control */
 941                         CtrlID = LineOffset * IDC_LINE_NAME;
 942
 943                         /* get line name */
 944                         if (GetDlgItemTextW(hwnd, CtrlID, Context.LineName, MIXER_LONG_NAME_CHARS) != 0)
 945                         {
 946                             /* setup context */
 947                             Context.SliderPos = SendMessage((HWND)lParam, BM_GETCHECK, 0, 0);
 948                             Context.bVertical = FALSE;
 949                             Context.bSwitch = TRUE;
 950
 951                             /* set volume */
 952                             SndMixerEnumConnections(Preferences.MixerWindow->Mixer, Preferences.SelectedLine, SetVolumeCallback, (LPVOID)&Context);
 953                         }
 954                     }
 955                 }
 956
 957             }
 958             break;
 959         }
 960
 961         case MM_MIXM_LINE_CHANGE:
 962         {
 963             DPRINT("MM_MIXM_LINE_CHANGE\n");
 964             break;
 965         }
 966
 967         case MM_MIXM_CONTROL_CHANGE:
 968         {
 969             DPRINT("MM_MIXM_CONTROL_CHANGE\n");
 970
 971             /* get mixer window */
 972             MixerWindow = GetWindowData(hwnd,
 973                                         MIXER_WINDOW);
 974
 975             /* sanity checks */
 976             assert(MixerWindow);
 977             assert(MixerWindow->Mixer->hmx == (HMIXER)wParam);
 978
 979             SndMixerEnumConnections(MixerWindow->Mixer, Preferences.SelectedLine, MixerControlChangeCallback, (PVOID)lParam);
 980             break;
 981         }
 982
 983         case WM_VSCROLL:
 984             switch (LOWORD(wParam))
 985             {
 986                 case TB_THUMBTRACK:
 987                     /* get dialog item ctrl */
 988                     CtrlID = GetDlgCtrlID((HWND)lParam);
 989
 990                     /* get line index */
 991                     LineOffset = CtrlID / IDC_LINE_SLIDER_VERT;
 992
 993                     /* compute window id of line name static control */
 994                     CtrlID = LineOffset * IDC_LINE_NAME;
 995
 996                     /* get line name */
 997                     if (GetDlgItemTextW(hwnd, CtrlID, Context.LineName, MIXER_LONG_NAME_CHARS) != 0)
 998                     {
 999                         /* setup context */
1000                         Context.SliderPos = HIWORD(wParam);
1001                         Context.bVertical = TRUE;
1002                         Context.bSwitch = FALSE;
1003
1004                         /* set volume */
1005                         SndMixerEnumConnections(Preferences.MixerWindow->Mixer, Preferences.SelectedLine, SetVolumeCallback, (LPVOID)&Context);
1006                     }
1007                     break;
1008
1009                 case TB_ENDTRACK:
1010                     MixerWindow = GetWindowData(hwnd,
1011                                                 MIXER_WINDOW);
1012
1013                     /* get dialog item ctrl */
1014                     CtrlID = GetDlgCtrlID((HWND)lParam);
1015
1016                     /* get line index */
1017                     LineOffset = CtrlID / IDC_LINE_SLIDER_VERT;
1018
1019                     if (LineOffset == 1 && MixerWindow->Mixer->MixerId == 0)
1020                         PlaySound((LPCTSTR)SND_ALIAS_SYSTEMDEFAULT, NULL, SND_ASYNC | SND_ALIAS_ID);
1021                     break;
1022
1023                 default:
1024                     break;
1025             }
1026             break;
1027
1028         case WM_HSCROLL:
1029             switch (LOWORD(wParam))
1030             {
1031                 case TB_THUMBTRACK:
1032                     /* FIXME */
1033                     break;
1034
1035                 case TB_ENDTRACK:
1036                     MixerWindow = GetWindowData(hwnd,
1037                                                 MIXER_WINDOW);
1038
1039                     /* get dialog item ctrl */
1040                     CtrlID = GetDlgCtrlID((HWND)lParam);
1041
1042                     /* get line index */
1043                     LineOffset = CtrlID / IDC_LINE_SLIDER_HORZ;
1044
1045                     if (LineOffset == 1 && MixerWindow->Mixer->MixerId == 0)
1046                         PlaySound((LPCTSTR)SND_ALIAS_SYSTEMDEFAULT, NULL, SND_ASYNC | SND_ALIAS_ID);
1047                     break;
1048
1049                 default:
1050                     break;
1051             }
1052             break;
1053
1054
1055         case WM_CREATE:
1056         {
1057             MixerWindow = ((LPCREATESTRUCT)lParam)->lpCreateParams;
1058             SetWindowLongPtr(hwnd,
1059                              GWL_USERDATA,
1060                              (LONG_PTR)MixerWindow);
1061             MixerWindow->hWnd = hwnd;
1062             MixerWindow->Mixer = SndMixerCreate(MixerWindow->hWnd, MixerWindow->MixerId);
1063             if (MixerWindow->Mixer != NULL)
1064             {
1065                 TCHAR szProduct[MAXPNAMELEN];
1066
1067                 /* get mixer product name */
1068                 if (SndMixerGetProductName(MixerWindow->Mixer,
1069                                            szProduct,
1070                                            sizeof(szProduct) / sizeof(szProduct[0])) == -1)
1071                 {
1072                     /* failed to get name */
1073                     szProduct[0] = L'\0';
1074                 }
1075
1076
1077                 /* initialize preferences */
1078                 ZeroMemory(&Preferences, sizeof(Preferences));
1079
1080                 /* store mixer */
1081                 Preferences.Mixer = MixerWindow->Mixer;
1082
1083                 /* store mixer window */
1084                 Preferences.MixerWindow = MixerWindow;
1085
1086                 /* first destination line id */
1087                 Preferences.SelectedLine = 0xFFFF0000;
1088
1089                 /* copy product */
1090                 wcscpy(Preferences.DeviceName, szProduct);
1091
1092                 if (!RebuildMixerWindowControls(&Preferences))
1093                 {
1094                     DPRINT("Rebuilding mixer window controls failed!\n");
1095                     SndMixerDestroy(MixerWindow->Mixer);
1096                     MixerWindow->Mixer = NULL;
1097                     Result = -1;
1098                 }
1099
1100                 /* create status window */
1101                 if (MixerWindow->Mode == NORMAL_MODE)
1102                 {
1103                     MixerWindow->hStatusBar = CreateStatusWindow(WS_VISIBLE | WS_CHILD | WS_CLIPSIBLINGS,
1104                                                                  NULL,
1105                                                                  hwnd,
1106                                                                  0);
1107                     if (MixerWindow->hStatusBar)
1108                     {
1109                         SendMessage(MixerWindow->hStatusBar,
1110                                     WM_SETTEXT,
1111                                     0,
1112                                    (LPARAM)szProduct);
1113                     }
1114                 }
1115
1116                 /* Disable the 'Advanced Controls' menu item */
1117                 EnableMenuItem(GetMenu(hwnd), IDC_ADVANCED_CONTROLS, MF_BYCOMMAND | MF_GRAYED);
1118             }
1119             break;
1120         }
1121
1122         case WM_DESTROY:
1123         {
1124             MixerWindow = GetWindowData(hwnd,
1125                                         MIXER_WINDOW);
1126             if (MixerWindow != NULL)
1127             {
1128                 if (MixerWindow->Mixer != NULL)
1129                 {
1130                     SndMixerDestroy(MixerWindow->Mixer);
1131                 }
1132                 if (MixerWindow->hFont)
1133                     DeleteObject(MixerWindow->hFont);
1134                 HeapFree(hAppHeap, 0, MixerWindow);
1135             }
1136             break;
1137         }
1138
1139         case WM_CLOSE:
1140         {
1141             PostQuitMessage(0);
1142             break;
1143         }
1144
1145         default:
1146         {
1147             Result = DefWindowProc(hwnd,
1148                                    uMsg,
1149                                    wParam,
1150                                    lParam);
1151             break;
1152         }
1153     }
1154
1155     return Result;
1156 }
1157
1158 static BOOL
1159 RegisterApplicationClasses(VOID)
1160 {
1161     WNDCLASSEX wc;
1162
1163     wc.cbSize = sizeof(WNDCLASSEX);
1164     wc.style = CS_HREDRAW | CS_VREDRAW;
1165     wc.lpfnWndProc = MainWindowProc;
1166     wc.cbClsExtra = 0;
1167     wc.cbWndExtra = sizeof(PMIXER_WINDOW);
1168     wc.hInstance = hAppInstance;
1169     wc.hIcon = LoadIcon(hAppInstance,
1170                         MAKEINTRESOURCE(IDI_MAINAPP));
1171     wc.hCursor = LoadCursor(NULL,
1172                             IDC_ARROW);
1173     wc.hbrBackground = (HBRUSH)(COLOR_BTNFACE + 1);
1174     wc.lpszMenuName = NULL;
1175     wc.lpszClassName = SZ_APP_CLASS;
1176     wc.hIconSm = NULL;
1177     MainWindowClass = RegisterClassEx(&wc);
1178
1179     return MainWindowClass != 0;
1180 }
1181
1182 static VOID
1183 UnregisterApplicationClasses(VOID)
1184 {
1185     UnregisterClass(SZ_APP_CLASS,
1186                     hAppInstance);
1187 }
1188
1189 static HWND
1190 CreateApplicationWindow(
1191     WINDOW_MODE WindowMode,
1192     UINT MixerId)
1193 {
1194     HWND hWnd;
1195
1196     PMIXER_WINDOW MixerWindow = HeapAlloc(hAppHeap,
1197                                           HEAP_ZERO_MEMORY,
1198                                           sizeof(MIXER_WINDOW));
1199     if (MixerWindow == NULL)
1200     {
1201         return NULL;
1202     }
1203
1204     MixerWindow->Mode = WindowMode;
1205     MixerWindow->MixerId = MixerId;
1206
1207     if (mixerGetNumDevs() > 0)
1208     {
1209         hWnd = CreateWindowEx(WS_EX_WINDOWEDGE | WS_EX_CONTROLPARENT,
1210                               SZ_APP_CLASS,
1211                               lpAppTitle,
1212                               WS_DLGFRAME | WS_CAPTION | WS_MINIMIZEBOX | WS_SYSMENU | WS_CLIPCHILDREN | WS_CLIPSIBLINGS | WS_VISIBLE,
1213                               0, 0, 300, 315,
1214                               NULL,
1215                               LoadMenu(hAppInstance,
1216                                        MAKEINTRESOURCE(IDM_MAINMENU)),
1217                               hAppInstance,
1218                               MixerWindow);
1219     }
1220     else
1221     {
1222         LPTSTR lpErrMessage;
1223
1224         /*
1225          * no mixer devices are available!
1226          */
1227
1228         hWnd = NULL;
1229         if (AllocAndLoadString(&lpErrMessage,
1230                                hAppInstance,
1231                                IDS_NOMIXERDEVICES))
1232         {
1233             MessageBox(NULL,
1234                        lpErrMessage,
1235                        lpAppTitle,
1236                        MB_ICONINFORMATION);
1237             LocalFree(lpErrMessage);
1238         }
1239     }
1240
1241     if (hWnd == NULL)
1242     {
1243         HeapFree(hAppHeap,
1244                  0,
1245                  MixerWindow);
1246     }
1247
1248     return hWnd;
1249 }
1250
1251 static
1252 BOOL
1253 HandleCommandLine(LPTSTR cmdline,
1254                   PWINDOW_MODE pMode,
1255                   PUINT pMixerId)
1256 {
1257     TCHAR option;
1258
1259     *pMixerId = 0;
1260     *pMode = SMALL_MODE;
1261
1262     while (*cmdline == _T(' ') || *cmdline == _T('-') || *cmdline == _T('/'))
1263     {
1264         if (*cmdline++ == _T(' '))
1265             continue;
1266
1267         option = *cmdline;
1268         if (option)
1269             cmdline++;
1270         while (*cmdline == _T(' '))
1271             cmdline++;
1272
1273         switch (option)
1274         {
1275             case 'd': /* Device */
1276             case 'D':
1277                 break;
1278
1279             case 'n': /* Normal size */
1280             case 'N':
1281                 *pMode = NORMAL_MODE;
1282                 break;
1283
1284             case 's': /* Small size */
1285             case 'S':
1286                 *pMode = SMALL_MODE;
1287                 break;
1288
1289             case 't': /* Tray size */
1290             case 'T':
1291                 *pMode = TRAY_MODE;
1292                 break;
1293
1294             case 'p': /* Play mode */
1295             case 'P':
1296                 *pMixerId = 0;
1297                 break;
1298
1299             case 'r': /* Record mode */
1300             case 'R':
1301                 *pMixerId = 1;
1302                 break;
1303
1304             default:
1305                 return FALSE;
1306         }
1307     }
1308
1309     return TRUE;
1310 }
1311
1312 int WINAPI
1313 _tWinMain(HINSTANCE hInstance,
1314           HINSTANCE hPrevInstance,
1315           LPTSTR lpszCmdLine,
1316           int nCmdShow)
1317 {
1318     MSG Msg;
1319     int Ret = 1;
1320     INITCOMMONCONTROLSEX Controls;
1321     WINDOW_MODE WindowMode = SMALL_MODE;
1322     UINT MixerId = 0;
1323
1324     UNREFERENCED_PARAMETER(hPrevInstance);
1325     UNREFERENCED_PARAMETER(nCmdShow);
1326
1327     hAppInstance = hInstance;
1328     hAppHeap = GetProcessHeap();
1329
1330     HandleCommandLine(lpszCmdLine, &WindowMode, &MixerId);
1331
1332     if (InitAppConfig())
1333     {
1334         /* load the application title */
1335         if (!AllocAndLoadString(&lpAppTitle,
1336                                 hAppInstance,
1337                                 IDS_SNDVOL32))
1338         {
1339             lpAppTitle = NULL;
1340         }
1341
1342         Controls.dwSize = sizeof(INITCOMMONCONTROLSEX);
1343         Controls.dwICC = ICC_BAR_CLASSES | ICC_STANDARD_CLASSES;
1344
1345         InitCommonControlsEx(&Controls);
1346
1347         if (WindowMode == TRAY_MODE)
1348         {
1349             DialogBoxParam(hAppInstance,
1350                            MAKEINTRESOURCE(IDD_TRAY_MASTER),
1351                            NULL,
1352                            TrayDlgProc,
1353                            0);
1354         }
1355         else
1356         {
1357             if (RegisterApplicationClasses())
1358             {
1359                 hMainWnd = CreateApplicationWindow(WindowMode, MixerId);
1360                 if (hMainWnd != NULL)
1361                 {
1362                     BOOL bRet;
1363                     while ((bRet =GetMessage(&Msg,
1364                                              NULL,
1365                                              0,
1366                                              0)) != 0)
1367                     {
1368                         if (bRet != -1)
1369                         {
1370                             TranslateMessage(&Msg);
1371                             DispatchMessage(&Msg);
1372                         }
1373                     }
1374
1375                     DestroyWindow(hMainWnd);
1376                     Ret = 0;
1377                 }
1378                 else
1379                 {
1380                     DPRINT("Failed to create application window (LastError: %d)!\n", GetLastError());
1381                 }
1382
1383                 UnregisterApplicationClasses();
1384             }
1385             else
1386             {
1387                 DPRINT("Failed to register application classes (LastError: %d)!\n", GetLastError());
1388             }
1389         }
1390
1391         if (lpAppTitle != NULL)
1392         {
1393             LocalFree(lpAppTitle);
1394         }
1395
1396         CloseAppConfig();
1397     }
1398     else
1399     {
1400         DPRINT("Unable to open the Volume Control registry key!\n");
1401     }
1402
1403     return Ret;
1404 }