dlls/winemp3.acm/mpegl3.c

   1 /*
   2  * MPEG Layer 3 handling
   3  *
   4  *      Copyright (C) 2002              Eric Pouech
   5  *
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21
  22 #include <assert.h>
  23 #include <stdarg.h>
  24 #include <string.h>
  25 #include "windef.h"
  26 #include "winbase.h"
  27 #include "wingdi.h"
  28 #include "winuser.h"
  29 #include "winnls.h"
  30 #include "mmsystem.h"
  31 #include "mmreg.h"
  32 #include "msacm.h"
  33 #include "msacmdrv.h"
  34 #include "mpg123.h"
  35 #include "mpglib.h"
  36
  37 #include "wine/debug.h"
  38
  39 WINE_DEFAULT_DEBUG_CHANNEL(mpeg3);
  40
  41 /***********************************************************************
  42  *           MPEG3_drvOpen
  43  */
  44 static LRESULT MPEG3_drvOpen(LPCSTR str)
  45 {
  46     return 1;
  47 }
  48
  49 /***********************************************************************
  50  *           MPEG3_drvClose
  51  */
  52 static LRESULT MPEG3_drvClose(DWORD_PTR dwDevID)
  53 {
  54     return 1;
  55 }
  56
  57 typedef struct tagAcmMpeg3Data
  58 {
  59     void (*convert)(PACMDRVSTREAMINSTANCE adsi,
  60                     const unsigned char*, LPDWORD, unsigned char*, LPDWORD);
  61     struct mpstr mp;
  62 } AcmMpeg3Data;
  63
  64 /* table to list all supported formats... those are the basic ones. this
  65  * also helps given a unique index to each of the supported formats
  66  */
  67 typedef struct
  68 {
  69     int         nChannels;
  70     int         nBits;
  71     int         rate;
  72 } Format;
  73
  74 static const Format PCM_Formats[] =
  75 {
  76     {1,  8,  8000}, {2,  8,  8000}, {1, 16,  8000}, {2, 16,  8000},
  77     {1,  8, 11025}, {2,  8, 11025}, {1, 16, 11025}, {2, 16, 11025},
  78     {1,  8, 22050}, {2,  8, 22050}, {1, 16, 22050}, {2, 16, 22050},
  79     {1,  8, 44100}, {2,  8, 44100}, {1, 16, 44100}, {2, 16, 44100},
  80 };
  81
  82 static const Format MPEG3_Formats[] =
  83 {
  84     {1,  0,  8000}, {2, 0,  8000},  {1,  0, 11025}, {2,  0, 11025},
  85     {1,  0, 22050}, {2, 0, 22050},  {1,  0, 44100}, {2,  0, 44100},
  86 };
  87
  88 #define NUM_PCM_FORMATS         (sizeof(PCM_Formats) / sizeof(PCM_Formats[0]))
  89 #define NUM_MPEG3_FORMATS       (sizeof(MPEG3_Formats) / sizeof(MPEG3_Formats[0]))
  90
  91 /***********************************************************************
  92  *           MPEG3_GetFormatIndex
  93  */
  94 static  DWORD   MPEG3_GetFormatIndex(LPWAVEFORMATEX wfx)
  95 {
  96     int         i, hi;
  97     const Format *fmts;
  98
  99     switch (wfx->wFormatTag)
 100     {
 101     case WAVE_FORMAT_PCM:
 102         hi = NUM_PCM_FORMATS;
 103         fmts = PCM_Formats;
 104         break;
 105     case WAVE_FORMAT_MPEGLAYER3:
 106         hi = NUM_MPEG3_FORMATS;
 107         fmts = MPEG3_Formats;
 108         break;
 109     default:
 110         return 0xFFFFFFFF;
 111     }
 112
 113     for (i = 0; i < hi; i++)
 114     {
 115         if (wfx->nChannels == fmts[i].nChannels &&
 116             wfx->nSamplesPerSec == fmts[i].rate &&
 117             wfx->wBitsPerSample == fmts[i].nBits)
 118             return i;
 119     }
 120
 121     return 0xFFFFFFFF;
 122 }
 123
 124 static DWORD get_num_buffered_bytes(struct mpstr *mp)
 125 {
 126     DWORD numBuff = 0;
 127     struct buf * p = mp->tail;
 128     while (p) {
 129         numBuff += p->size - p->pos;
 130         p = p->next;
 131     }
 132     return numBuff;
 133 }
 134
 135 static void mp3_horse(PACMDRVSTREAMINSTANCE adsi,
 136                       const unsigned char* src, LPDWORD nsrc,
 137                       unsigned char* dst, LPDWORD ndst)
 138 {
 139     AcmMpeg3Data*       amd = (AcmMpeg3Data*)adsi->dwDriver;
 140     int                 size, ret;
 141     DWORD               dpos = 0;
 142     DWORD               buffered_before;
 143     DWORD               buffered_during;
 144     DWORD               buffered_after;
 145
 146     buffered_before = get_num_buffered_bytes(&amd->mp);
 147     ret = decodeMP3(&amd->mp, src, *nsrc, dst, *ndst, &size);
 148     buffered_during = get_num_buffered_bytes(&amd->mp);
 149     if (ret != MP3_OK)
 150     {
 151         *ndst = *nsrc = 0;
 152         return;
 153     }
 154     do {
 155         dpos += size;
 156         if (*ndst - dpos < 4608) break;
 157         ret = decodeMP3(&amd->mp, NULL, 0,
 158                         dst + dpos, *ndst - dpos, &size);
 159     } while (ret == MP3_OK);
 160     *ndst = dpos;
 161
 162     buffered_after = get_num_buffered_bytes(&amd->mp);
 163     TRACE("before %d put %d during %d after %d\n", buffered_before, *nsrc, buffered_during, buffered_after);
 164 }
 165
 166 /***********************************************************************
 167  *           MPEG3_DriverDetails
 168  *
 169  */
 170 static  LRESULT MPEG3_DriverDetails(PACMDRIVERDETAILSW add)
 171 {
 172     add->fccType = ACMDRIVERDETAILS_FCCTYPE_AUDIOCODEC;
 173     add->fccComp = ACMDRIVERDETAILS_FCCCOMP_UNDEFINED;
 174     add->wMid = 0xFF;
 175     add->wPid = 0x00;
 176     add->vdwACM = 0x01000000;
 177     add->vdwDriver = 0x01000000;
 178     add->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CODEC;
 179     add->cFormatTags = 2; /* PCM, MPEG3 */
 180     add->cFilterTags = 0;
 181     add->hicon = NULL;
 182     MultiByteToWideChar( CP_ACP, 0, "WINE-MPEG3", -1,
 183                          add->szShortName, sizeof(add->szShortName)/sizeof(WCHAR) );
 184     MultiByteToWideChar( CP_ACP, 0, "Wine MPEG3 decoder", -1,
 185                          add->szLongName, sizeof(add->szLongName)/sizeof(WCHAR) );
 186     MultiByteToWideChar( CP_ACP, 0, "Brought to you by the Wine team (based on mpglib by Michael Hipp)...", -1,
 187                          add->szCopyright, sizeof(add->szCopyright)/sizeof(WCHAR) );
 188     MultiByteToWideChar( CP_ACP, 0, "Refer to LICENSE file", -1,
 189                          add->szLicensing, sizeof(add->szLicensing)/sizeof(WCHAR) );
 190     add->szFeatures[0] = 0;
 191
 192     return MMSYSERR_NOERROR;
 193 }
 194
 195 /***********************************************************************
 196  *           MPEG3_FormatTagDetails
 197  *
 198  */
 199 static  LRESULT MPEG3_FormatTagDetails(PACMFORMATTAGDETAILSW aftd, DWORD dwQuery)
 200 {
 201     static const WCHAR szPcm[]={'P','C','M',0};
 202     static const WCHAR szMpeg3[]={'M','P','e','g','3',0};
 203
 204     switch (dwQuery)
 205     {
 206     case ACM_FORMATTAGDETAILSF_INDEX:
 207         if (aftd->dwFormatTagIndex >= 2) return ACMERR_NOTPOSSIBLE;
 208         break;
 209     case ACM_FORMATTAGDETAILSF_LARGESTSIZE:
 210         if (aftd->dwFormatTag == WAVE_FORMAT_UNKNOWN)
 211         {
 212             aftd->dwFormatTagIndex = 1; /* WAVE_FORMAT_MPEGLAYER3 is bigger than PCM */
 213             break;
 214         }
 215         /* fall thru */
 216     case ACM_FORMATTAGDETAILSF_FORMATTAG:
 217         switch (aftd->dwFormatTag)
 218         {
 219         case WAVE_FORMAT_PCM:           aftd->dwFormatTagIndex = 0; break;
 220         case WAVE_FORMAT_MPEGLAYER3:    aftd->dwFormatTagIndex = 1; break;
 221         default:                        return ACMERR_NOTPOSSIBLE;
 222         }
 223         break;
 224     default:
 225         WARN("Unsupported query %08x\n", dwQuery);
 226         return MMSYSERR_NOTSUPPORTED;
 227     }
 228
 229     aftd->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CODEC;
 230     switch (aftd->dwFormatTagIndex)
 231     {
 232     case 0:
 233         aftd->dwFormatTag = WAVE_FORMAT_PCM;
 234         aftd->cbFormatSize = sizeof(PCMWAVEFORMAT);
 235         aftd->cStandardFormats = NUM_PCM_FORMATS;
 236         lstrcpyW(aftd->szFormatTag, szPcm);
 237         break;
 238     case 1:
 239         aftd->dwFormatTag = WAVE_FORMAT_MPEGLAYER3;
 240         aftd->cbFormatSize = sizeof(MPEGLAYER3WAVEFORMAT);
 241         aftd->cStandardFormats = NUM_MPEG3_FORMATS;
 242         lstrcpyW(aftd->szFormatTag, szMpeg3);
 243         break;
 244     }
 245     return MMSYSERR_NOERROR;
 246 }
 247
 248 static void fill_in_wfx(unsigned cbwfx, WAVEFORMATEX* wfx, unsigned bit_rate)
 249 {
 250     MPEGLAYER3WAVEFORMAT*   mp3wfx = (MPEGLAYER3WAVEFORMAT*)wfx;
 251
 252     wfx->nAvgBytesPerSec = bit_rate / 8;
 253     if (cbwfx >= sizeof(WAVEFORMATEX))
 254         wfx->cbSize = sizeof(MPEGLAYER3WAVEFORMAT) - sizeof(WAVEFORMATEX);
 255     if (cbwfx >= sizeof(MPEGLAYER3WAVEFORMAT))
 256     {
 257         mp3wfx->wID = MPEGLAYER3_ID_MPEG;
 258         mp3wfx->fdwFlags = MPEGLAYER3_FLAG_PADDING_OFF;
 259         mp3wfx->nBlockSize = (bit_rate * 144) / wfx->nSamplesPerSec;
 260         mp3wfx->nFramesPerBlock = 1;
 261         mp3wfx->nCodecDelay = 0x0571;
 262     }
 263 }
 264
 265 /***********************************************************************
 266  *           MPEG3_FormatDetails
 267  *
 268  */
 269 static  LRESULT MPEG3_FormatDetails(PACMFORMATDETAILSW afd, DWORD dwQuery)
 270 {
 271     switch (dwQuery)
 272     {
 273     case ACM_FORMATDETAILSF_FORMAT:
 274         if (MPEG3_GetFormatIndex(afd->pwfx) == 0xFFFFFFFF) return ACMERR_NOTPOSSIBLE;
 275         break;
 276     case ACM_FORMATDETAILSF_INDEX:
 277         afd->pwfx->wFormatTag = afd->dwFormatTag;
 278         switch (afd->dwFormatTag)
 279         {
 280         case WAVE_FORMAT_PCM:
 281             if (afd->dwFormatIndex >= NUM_PCM_FORMATS) return ACMERR_NOTPOSSIBLE;
 282             afd->pwfx->nChannels = PCM_Formats[afd->dwFormatIndex].nChannels;
 283             afd->pwfx->nSamplesPerSec = PCM_Formats[afd->dwFormatIndex].rate;
 284             afd->pwfx->wBitsPerSample = PCM_Formats[afd->dwFormatIndex].nBits;
 285             /* native MSACM uses a PCMWAVEFORMAT structure, so cbSize is not accessible
 286              * afd->pwfx->cbSize = 0;
 287              */
 288             afd->pwfx->nBlockAlign =
 289                 (afd->pwfx->nChannels * afd->pwfx->wBitsPerSample) / 8;
 290             afd->pwfx->nAvgBytesPerSec =
 291                 afd->pwfx->nSamplesPerSec * afd->pwfx->nBlockAlign;
 292             break;
 293         case WAVE_FORMAT_MPEGLAYER3:
 294             if (afd->dwFormatIndex >= NUM_MPEG3_FORMATS) return ACMERR_NOTPOSSIBLE;
 295             afd->pwfx->nChannels = MPEG3_Formats[afd->dwFormatIndex].nChannels;
 296             afd->pwfx->nSamplesPerSec = MPEG3_Formats[afd->dwFormatIndex].rate;
 297             afd->pwfx->wBitsPerSample = MPEG3_Formats[afd->dwFormatIndex].nBits;
 298             afd->pwfx->nBlockAlign = 1;
 299             fill_in_wfx(afd->cbwfx, afd->pwfx, 192000);
 300             break;
 301         default:
 302             WARN("Unsupported tag %08x\n", afd->dwFormatTag);
 303             return MMSYSERR_INVALPARAM;
 304         }
 305         break;
 306     default:
 307         WARN("Unsupported query %08x\n", dwQuery);
 308         return MMSYSERR_NOTSUPPORTED;
 309     }
 310     afd->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CODEC;
 311     afd->szFormat[0] = 0; /* let MSACM format this for us... */
 312
 313     return MMSYSERR_NOERROR;
 314 }
 315
 316 /***********************************************************************
 317  *           MPEG3_FormatSuggest
 318  *
 319  */
 320 static  LRESULT MPEG3_FormatSuggest(PACMDRVFORMATSUGGEST adfs)
 321 {
 322     /* some tests ... */
 323     if (adfs->cbwfxSrc < sizeof(PCMWAVEFORMAT) ||
 324         adfs->cbwfxDst < sizeof(PCMWAVEFORMAT) ||
 325         MPEG3_GetFormatIndex(adfs->pwfxSrc) == 0xFFFFFFFF) return ACMERR_NOTPOSSIBLE;
 326     /* FIXME: should do those tests against the real size (according to format tag */
 327
 328     /* If no suggestion for destination, then copy source value */
 329     if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_NCHANNELS))
 330         adfs->pwfxDst->nChannels = adfs->pwfxSrc->nChannels;
 331     if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_NSAMPLESPERSEC))
 332         adfs->pwfxDst->nSamplesPerSec = adfs->pwfxSrc->nSamplesPerSec;
 333
 334     if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_WBITSPERSAMPLE))
 335     {
 336         if (adfs->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM)
 337             adfs->pwfxDst->wBitsPerSample = 4;
 338         else
 339             adfs->pwfxDst->wBitsPerSample = 16;
 340     }
 341     if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_WFORMATTAG))
 342     {
 343         if (adfs->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM)
 344             adfs->pwfxDst->wFormatTag = WAVE_FORMAT_MPEGLAYER3;
 345         else
 346             adfs->pwfxDst->wFormatTag = WAVE_FORMAT_PCM;
 347     }
 348
 349     /* check if result is ok */
 350     if (MPEG3_GetFormatIndex(adfs->pwfxDst) == 0xFFFFFFFF) return ACMERR_NOTPOSSIBLE;
 351
 352     /* recompute other values */
 353     switch (adfs->pwfxDst->wFormatTag)
 354     {
 355     case WAVE_FORMAT_PCM:
 356         adfs->pwfxDst->nBlockAlign = (adfs->pwfxDst->nChannels * adfs->pwfxDst->wBitsPerSample) / 8;
 357         adfs->pwfxDst->nAvgBytesPerSec = adfs->pwfxDst->nSamplesPerSec * adfs->pwfxDst->nBlockAlign;
 358         break;
 359     case WAVE_FORMAT_MPEGLAYER3:
 360         adfs->pwfxDst->nBlockAlign = 1;
 361         fill_in_wfx(adfs->cbwfxDst, adfs->pwfxDst, 192000);
 362         break;
 363     default:
 364         FIXME("\n");
 365         break;
 366     }
 367
 368     return MMSYSERR_NOERROR;
 369 }
 370
 371 /***********************************************************************
 372  *           MPEG3_Reset
 373  *
 374  */
 375 static  void    MPEG3_Reset(PACMDRVSTREAMINSTANCE adsi, AcmMpeg3Data* aad)
 376 {
 377     ExitMP3(&aad->mp);
 378     InitMP3(&aad->mp);
 379 }
 380
 381 /***********************************************************************
 382  *           MPEG3_StreamOpen
 383  *
 384  */
 385 static  LRESULT MPEG3_StreamOpen(PACMDRVSTREAMINSTANCE adsi)
 386 {
 387     AcmMpeg3Data*       aad;
 388
 389     assert(!(adsi->fdwOpen & ACM_STREAMOPENF_ASYNC));
 390
 391     if (MPEG3_GetFormatIndex(adsi->pwfxSrc) == 0xFFFFFFFF ||
 392         MPEG3_GetFormatIndex(adsi->pwfxDst) == 0xFFFFFFFF)
 393         return ACMERR_NOTPOSSIBLE;
 394
 395     aad = HeapAlloc(GetProcessHeap(), 0, sizeof(AcmMpeg3Data));
 396     if (aad == 0) return MMSYSERR_NOMEM;
 397
 398     adsi->dwDriver = (DWORD)aad;
 399
 400     if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
 401         adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
 402     {
 403         goto theEnd;
 404     }
 405     else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_MPEGLAYER3 &&
 406              adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
 407     {
 408         /* resampling or mono <=> stereo not available
 409          * MPEG3 algo only define 16 bit per sample output
 410          */
 411         if (adsi->pwfxSrc->nSamplesPerSec != adsi->pwfxDst->nSamplesPerSec ||
 412             adsi->pwfxSrc->nChannels != adsi->pwfxDst->nChannels ||
 413             adsi->pwfxDst->wBitsPerSample != 16)
 414             goto theEnd;
 415         aad->convert = mp3_horse;
 416         InitMP3(&aad->mp);
 417     }
 418     /* no encoding yet
 419     else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
 420              adsi->pwfxDst->wFormatTag == WAVE_FORMAT_MPEGLAYER3)
 421     */
 422     else goto theEnd;
 423     MPEG3_Reset(adsi, aad);
 424
 425     return MMSYSERR_NOERROR;
 426
 427  theEnd:
 428     HeapFree(GetProcessHeap(), 0, aad);
 429     adsi->dwDriver = 0L;
 430     return MMSYSERR_NOTSUPPORTED;
 431 }
 432
 433 /***********************************************************************
 434  *           MPEG3_StreamClose
 435  *
 436  */
 437 static  LRESULT MPEG3_StreamClose(PACMDRVSTREAMINSTANCE adsi)
 438 {
 439     ExitMP3(&((AcmMpeg3Data*)adsi->dwDriver)->mp);
 440     HeapFree(GetProcessHeap(), 0, (void*)adsi->dwDriver);
 441     return MMSYSERR_NOERROR;
 442 }
 443
 444 /***********************************************************************
 445  *           MPEG3_StreamSize
 446  *
 447  */
 448 static  LRESULT MPEG3_StreamSize(PACMDRVSTREAMINSTANCE adsi, PACMDRVSTREAMSIZE adss)
 449 {
 450     switch (adss->fdwSize)
 451     {
 452     case ACM_STREAMSIZEF_DESTINATION:
 453         /* cbDstLength => cbSrcLength */
 454         if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
 455             adsi->pwfxDst->wFormatTag == WAVE_FORMAT_MPEGLAYER3)
 456         {
 457             /* don't take block overhead into account, doesn't matter too much */
 458             adss->cbSrcLength = adss->cbDstLength * 12;
 459         }
 460         else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_MPEGLAYER3 &&
 461                  adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
 462         {
 463             FIXME("misses the block header overhead\n");
 464             adss->cbSrcLength = 256 + adss->cbDstLength / 12;
 465         }
 466         else
 467         {
 468             return MMSYSERR_NOTSUPPORTED;
 469         }
 470         break;
 471     case ACM_STREAMSIZEF_SOURCE:
 472         /* cbSrcLength => cbDstLength */
 473         if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
 474             adsi->pwfxDst->wFormatTag == WAVE_FORMAT_MPEGLAYER3)
 475         {
 476             FIXME("misses the block header overhead\n");
 477             adss->cbDstLength = 256 + adss->cbSrcLength / 12;
 478         }
 479         else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_MPEGLAYER3 &&
 480                  adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
 481         {
 482             /* don't take block overhead into account, doesn't matter too much */
 483             adss->cbDstLength = adss->cbSrcLength * 12;
 484         }
 485         else
 486         {
 487             return MMSYSERR_NOTSUPPORTED;
 488         }
 489         break;
 490     default:
 491         WARN("Unsupported query %08x\n", adss->fdwSize);
 492         return MMSYSERR_NOTSUPPORTED;
 493     }
 494     return MMSYSERR_NOERROR;
 495 }
 496
 497 /***********************************************************************
 498  *           MPEG3_StreamConvert
 499  *
 500  */
 501 static LRESULT MPEG3_StreamConvert(PACMDRVSTREAMINSTANCE adsi, PACMDRVSTREAMHEADER adsh)
 502 {
 503     AcmMpeg3Data*       aad = (AcmMpeg3Data*)adsi->dwDriver;
 504     DWORD               nsrc = adsh->cbSrcLength;
 505     DWORD               ndst = adsh->cbDstLength;
 506
 507     if (adsh->fdwConvert &
 508         ~(ACM_STREAMCONVERTF_BLOCKALIGN|
 509           ACM_STREAMCONVERTF_END|
 510           ACM_STREAMCONVERTF_START))
 511     {
 512         FIXME("Unsupported fdwConvert (%08x), ignoring it\n", adsh->fdwConvert);
 513     }
 514     /* ACM_STREAMCONVERTF_BLOCKALIGN
 515      *  currently all conversions are block aligned, so do nothing for this flag
 516      * ACM_STREAMCONVERTF_END
 517      *  no pending data, so do nothing for this flag
 518      */
 519     if ((adsh->fdwConvert & ACM_STREAMCONVERTF_START))
 520     {
 521         MPEG3_Reset(adsi, aad);
 522     }
 523
 524     aad->convert(adsi, adsh->pbSrc, &nsrc, adsh->pbDst, &ndst);
 525     adsh->cbSrcLengthUsed = nsrc;
 526     adsh->cbDstLengthUsed = ndst;
 527
 528     return MMSYSERR_NOERROR;
 529 }
 530
 531 /**************************************************************************
 532  *                      MPEG3_DriverProc                        [exported]
 533  */
 534 LRESULT CALLBACK MPEG3_DriverProc(DWORD_PTR dwDevID, HDRVR hDriv, UINT wMsg,
 535                                          LPARAM dwParam1, LPARAM dwParam2)
 536 {
 537     TRACE("(%08lx %p %04x %08lx %08lx);\n",
 538           dwDevID, hDriv, wMsg, dwParam1, dwParam2);
 539
 540     switch (wMsg)
 541     {
 542     case DRV_LOAD:              return 1;
 543     case DRV_FREE:              return 1;
 544     case DRV_OPEN:              return MPEG3_drvOpen((LPSTR)dwParam1);
 545     case DRV_CLOSE:             return MPEG3_drvClose(dwDevID);
 546     case DRV_ENABLE:            return 1;
 547     case DRV_DISABLE:           return 1;
 548     case DRV_QUERYCONFIGURE:    return 1;
 549     case DRV_CONFIGURE:         MessageBoxA(0, "MPEG3 filter !", "Wine Driver", MB_OK); return 1;
 550     case DRV_INSTALL:           return DRVCNF_RESTART;
 551     case DRV_REMOVE:            return DRVCNF_RESTART;
 552
 553     case ACMDM_DRIVER_NOTIFY:
 554         /* no caching from other ACM drivers is done so far */
 555         return MMSYSERR_NOERROR;
 556
 557     case ACMDM_DRIVER_DETAILS:
 558         return MPEG3_DriverDetails((PACMDRIVERDETAILSW)dwParam1);
 559
 560     case ACMDM_FORMATTAG_DETAILS:
 561         return MPEG3_FormatTagDetails((PACMFORMATTAGDETAILSW)dwParam1, dwParam2);
 562
 563     case ACMDM_FORMAT_DETAILS:
 564         return MPEG3_FormatDetails((PACMFORMATDETAILSW)dwParam1, dwParam2);
 565
 566     case ACMDM_FORMAT_SUGGEST:
 567         return MPEG3_FormatSuggest((PACMDRVFORMATSUGGEST)dwParam1);
 568
 569     case ACMDM_STREAM_OPEN:
 570         return MPEG3_StreamOpen((PACMDRVSTREAMINSTANCE)dwParam1);
 571
 572     case ACMDM_STREAM_CLOSE:
 573         return MPEG3_StreamClose((PACMDRVSTREAMINSTANCE)dwParam1);
 574
 575     case ACMDM_STREAM_SIZE:
 576         return MPEG3_StreamSize((PACMDRVSTREAMINSTANCE)dwParam1, (PACMDRVSTREAMSIZE)dwParam2);
 577
 578     case ACMDM_STREAM_CONVERT:
 579         return MPEG3_StreamConvert((PACMDRVSTREAMINSTANCE)dwParam1, (PACMDRVSTREAMHEADER)dwParam2);
 580
 581     case ACMDM_HARDWARE_WAVE_CAPS_INPUT:
 582     case ACMDM_HARDWARE_WAVE_CAPS_OUTPUT:
 583         /* this converter is not a hardware driver */
 584     case ACMDM_FILTERTAG_DETAILS:
 585     case ACMDM_FILTER_DETAILS:
 586         /* this converter is not a filter */
 587     case ACMDM_STREAM_RESET:
 588         /* only needed for asynchronous driver... we aren't, so just say it */
 589         return MMSYSERR_NOTSUPPORTED;
 590     case ACMDM_STREAM_PREPARE:
 591     case ACMDM_STREAM_UNPREPARE:
 592         /* nothing special to do here... so don't do anything */
 593         return MMSYSERR_NOERROR;
 594
 595     default:
 596         return DefDriverProc(dwDevID, hDriv, wMsg, dwParam1, dwParam2);
 597     }
 598 }