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     {1,  8, 48000}, {2,  8, 48000}, {1, 16, 48000}, {2, 16, 48000},
  81 };
  82
  83 static const Format MPEG3_Formats[] =
  84 {
  85     {1,  0,  8000}, {2, 0,  8000},  {1,  0, 11025}, {2,  0, 11025},
  86     {1,  0, 22050}, {2, 0, 22050},  {1,  0, 44100}, {2,  0, 44100},
  87     {1,  0, 48000}, {2, 0, 48000},
  88 };
  89
  90 #define NUM_PCM_FORMATS         (sizeof(PCM_Formats) / sizeof(PCM_Formats[0]))
  91 #define NUM_MPEG3_FORMATS       (sizeof(MPEG3_Formats) / sizeof(MPEG3_Formats[0]))
  92
  93 /***********************************************************************
  94  *           MPEG3_GetFormatIndex
  95  */
  96 static  DWORD   MPEG3_GetFormatIndex(LPWAVEFORMATEX wfx)
  97 {
  98     int         i, hi;
  99     const Format *fmts;
 100
 101     switch (wfx->wFormatTag)
 102     {
 103     case WAVE_FORMAT_PCM:
 104         hi = NUM_PCM_FORMATS;
 105         fmts = PCM_Formats;
 106         break;
 107     case WAVE_FORMAT_MPEGLAYER3:
 108         hi = NUM_MPEG3_FORMATS;
 109         fmts = MPEG3_Formats;
 110         break;
 111     default:
 112         return 0xFFFFFFFF;
 113     }
 114
 115     for (i = 0; i < hi; i++)
 116     {
 117         if (wfx->nChannels == fmts[i].nChannels &&
 118             wfx->nSamplesPerSec == fmts[i].rate &&
 119             wfx->wBitsPerSample == fmts[i].nBits)
 120             return i;
 121     }
 122
 123     return 0xFFFFFFFF;
 124 }
 125
 126 static DWORD get_num_buffered_bytes(struct mpstr *mp)
 127 {
 128     DWORD numBuff = 0;
 129     struct buf * p = mp->tail;
 130     while (p) {
 131         numBuff += p->size - p->pos;
 132         p = p->next;
 133     }
 134     return numBuff;
 135 }
 136
 137 static void mp3_horse(PACMDRVSTREAMINSTANCE adsi,
 138                       const unsigned char* src, LPDWORD nsrc,
 139                       unsigned char* dst, LPDWORD ndst)
 140 {
 141     AcmMpeg3Data*       amd = (AcmMpeg3Data*)adsi->dwDriver;
 142     int                 size, ret;
 143     DWORD               dpos = 0;
 144     DWORD               buffered_before;
 145     DWORD               buffered_during;
 146     DWORD               buffered_after;
 147
 148     buffered_before = get_num_buffered_bytes(&amd->mp);
 149     ret = decodeMP3(&amd->mp, src, *nsrc, dst, *ndst, &size);
 150     buffered_during = get_num_buffered_bytes(&amd->mp);
 151     if (ret != MP3_OK)
 152     {
 153         *ndst = *nsrc = 0;
 154         return;
 155     }
 156     do {
 157         dpos += size;
 158         if (*ndst - dpos < 4608) break;
 159         ret = decodeMP3(&amd->mp, NULL, 0,
 160                         dst + dpos, *ndst - dpos, &size);
 161     } while (ret == MP3_OK);
 162     *ndst = dpos;
 163
 164     buffered_after = get_num_buffered_bytes(&amd->mp);
 165     TRACE("before %d put %d during %d after %d\n", buffered_before, *nsrc, buffered_during, buffered_after);
 166 }
 167
 168 /***********************************************************************
 169  *           MPEG3_DriverDetails
 170  *
 171  */
 172 static  LRESULT MPEG3_DriverDetails(PACMDRIVERDETAILSW add)
 173 {
 174     add->fccType = ACMDRIVERDETAILS_FCCTYPE_AUDIOCODEC;
 175     add->fccComp = ACMDRIVERDETAILS_FCCCOMP_UNDEFINED;
 176     add->wMid = 0xFF;
 177     add->wPid = 0x00;
 178     add->vdwACM = 0x01000000;
 179     add->vdwDriver = 0x01000000;
 180     add->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CODEC;
 181     add->cFormatTags = 2; /* PCM, MPEG3 */
 182     add->cFilterTags = 0;
 183     add->hicon = NULL;
 184     MultiByteToWideChar( CP_ACP, 0, "WINE-MPEG3", -1,
 185                          add->szShortName, sizeof(add->szShortName)/sizeof(WCHAR) );
 186     MultiByteToWideChar( CP_ACP, 0, "Wine MPEG3 decoder", -1,
 187                          add->szLongName, sizeof(add->szLongName)/sizeof(WCHAR) );
 188     MultiByteToWideChar( CP_ACP, 0, "Brought to you by the Wine team (based on mpglib by Michael Hipp)...", -1,
 189                          add->szCopyright, sizeof(add->szCopyright)/sizeof(WCHAR) );
 190     MultiByteToWideChar( CP_ACP, 0, "Refer to LICENSE file", -1,
 191                          add->szLicensing, sizeof(add->szLicensing)/sizeof(WCHAR) );
 192     add->szFeatures[0] = 0;
 193
 194     return MMSYSERR_NOERROR;
 195 }
 196
 197 /***********************************************************************
 198  *           MPEG3_FormatTagDetails
 199  *
 200  */
 201 static  LRESULT MPEG3_FormatTagDetails(PACMFORMATTAGDETAILSW aftd, DWORD dwQuery)
 202 {
 203     static const WCHAR szPcm[]={'P','C','M',0};
 204     static const WCHAR szMpeg3[]={'M','P','e','g','3',0};
 205
 206     switch (dwQuery)
 207     {
 208     case ACM_FORMATTAGDETAILSF_INDEX:
 209         if (aftd->dwFormatTagIndex >= 2) return ACMERR_NOTPOSSIBLE;
 210         break;
 211     case ACM_FORMATTAGDETAILSF_LARGESTSIZE:
 212         if (aftd->dwFormatTag == WAVE_FORMAT_UNKNOWN)
 213         {
 214             aftd->dwFormatTagIndex = 1; /* WAVE_FORMAT_MPEGLAYER3 is bigger than PCM */
 215             break;
 216         }
 217         /* fall thru */
 218     case ACM_FORMATTAGDETAILSF_FORMATTAG:
 219         switch (aftd->dwFormatTag)
 220         {
 221         case WAVE_FORMAT_PCM:           aftd->dwFormatTagIndex = 0; break;
 222         case WAVE_FORMAT_MPEGLAYER3:    aftd->dwFormatTagIndex = 1; break;
 223         default:                        return ACMERR_NOTPOSSIBLE;
 224         }
 225         break;
 226     default:
 227         WARN("Unsupported query %08x\n", dwQuery);
 228         return MMSYSERR_NOTSUPPORTED;
 229     }
 230
 231     aftd->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CODEC;
 232     switch (aftd->dwFormatTagIndex)
 233     {
 234     case 0:
 235         aftd->dwFormatTag = WAVE_FORMAT_PCM;
 236         aftd->cbFormatSize = sizeof(PCMWAVEFORMAT);
 237         aftd->cStandardFormats = NUM_PCM_FORMATS;
 238         lstrcpyW(aftd->szFormatTag, szPcm);
 239         break;
 240     case 1:
 241         aftd->dwFormatTag = WAVE_FORMAT_MPEGLAYER3;
 242         aftd->cbFormatSize = sizeof(MPEGLAYER3WAVEFORMAT);
 243         aftd->cStandardFormats = NUM_MPEG3_FORMATS;
 244         lstrcpyW(aftd->szFormatTag, szMpeg3);
 245         break;
 246     }
 247     return MMSYSERR_NOERROR;
 248 }
 249
 250 static void fill_in_wfx(unsigned cbwfx, WAVEFORMATEX* wfx, unsigned bit_rate)
 251 {
 252     MPEGLAYER3WAVEFORMAT*   mp3wfx = (MPEGLAYER3WAVEFORMAT*)wfx;
 253
 254     wfx->nAvgBytesPerSec = bit_rate / 8;
 255     if (cbwfx >= sizeof(WAVEFORMATEX))
 256         wfx->cbSize = sizeof(MPEGLAYER3WAVEFORMAT) - sizeof(WAVEFORMATEX);
 257     if (cbwfx >= sizeof(MPEGLAYER3WAVEFORMAT))
 258     {
 259         mp3wfx->wID = MPEGLAYER3_ID_MPEG;
 260         mp3wfx->fdwFlags = MPEGLAYER3_FLAG_PADDING_OFF;
 261         mp3wfx->nBlockSize = (bit_rate * 144) / wfx->nSamplesPerSec;
 262         mp3wfx->nFramesPerBlock = 1;
 263         mp3wfx->nCodecDelay = 0x0571;
 264     }
 265 }
 266
 267 /***********************************************************************
 268  *           MPEG3_FormatDetails
 269  *
 270  */
 271 static  LRESULT MPEG3_FormatDetails(PACMFORMATDETAILSW afd, DWORD dwQuery)
 272 {
 273     switch (dwQuery)
 274     {
 275     case ACM_FORMATDETAILSF_FORMAT:
 276         if (MPEG3_GetFormatIndex(afd->pwfx) == 0xFFFFFFFF) return ACMERR_NOTPOSSIBLE;
 277         break;
 278     case ACM_FORMATDETAILSF_INDEX:
 279         afd->pwfx->wFormatTag = afd->dwFormatTag;
 280         switch (afd->dwFormatTag)
 281         {
 282         case WAVE_FORMAT_PCM:
 283             if (afd->dwFormatIndex >= NUM_PCM_FORMATS) return ACMERR_NOTPOSSIBLE;
 284             afd->pwfx->nChannels = PCM_Formats[afd->dwFormatIndex].nChannels;
 285             afd->pwfx->nSamplesPerSec = PCM_Formats[afd->dwFormatIndex].rate;
 286             afd->pwfx->wBitsPerSample = PCM_Formats[afd->dwFormatIndex].nBits;
 287             /* native MSACM uses a PCMWAVEFORMAT structure, so cbSize is not accessible
 288              * afd->pwfx->cbSize = 0;
 289              */
 290             afd->pwfx->nBlockAlign =
 291                 (afd->pwfx->nChannels * afd->pwfx->wBitsPerSample) / 8;
 292             afd->pwfx->nAvgBytesPerSec =
 293                 afd->pwfx->nSamplesPerSec * afd->pwfx->nBlockAlign;
 294             break;
 295         case WAVE_FORMAT_MPEGLAYER3:
 296             if (afd->dwFormatIndex >= NUM_MPEG3_FORMATS) return ACMERR_NOTPOSSIBLE;
 297             afd->pwfx->nChannels = MPEG3_Formats[afd->dwFormatIndex].nChannels;
 298             afd->pwfx->nSamplesPerSec = MPEG3_Formats[afd->dwFormatIndex].rate;
 299             afd->pwfx->wBitsPerSample = MPEG3_Formats[afd->dwFormatIndex].nBits;
 300             afd->pwfx->nBlockAlign = 1;
 301             fill_in_wfx(afd->cbwfx, afd->pwfx, 192000);
 302             break;
 303         default:
 304             WARN("Unsupported tag %08x\n", afd->dwFormatTag);
 305             return MMSYSERR_INVALPARAM;
 306         }
 307         break;
 308     default:
 309         WARN("Unsupported query %08x\n", dwQuery);
 310         return MMSYSERR_NOTSUPPORTED;
 311     }
 312     afd->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CODEC;
 313     afd->szFormat[0] = 0; /* let MSACM format this for us... */
 314
 315     return MMSYSERR_NOERROR;
 316 }
 317
 318 /***********************************************************************
 319  *           MPEG3_FormatSuggest
 320  *
 321  */
 322 static  LRESULT MPEG3_FormatSuggest(PACMDRVFORMATSUGGEST adfs)
 323 {
 324     /* some tests ... */
 325     if (adfs->cbwfxSrc < sizeof(PCMWAVEFORMAT) ||
 326         adfs->cbwfxDst < sizeof(PCMWAVEFORMAT) ||
 327         MPEG3_GetFormatIndex(adfs->pwfxSrc) == 0xFFFFFFFF) return ACMERR_NOTPOSSIBLE;
 328     /* FIXME: should do those tests against the real size (according to format tag */
 329
 330     /* If no suggestion for destination, then copy source value */
 331     if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_NCHANNELS))
 332         adfs->pwfxDst->nChannels = adfs->pwfxSrc->nChannels;
 333     if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_NSAMPLESPERSEC))
 334         adfs->pwfxDst->nSamplesPerSec = adfs->pwfxSrc->nSamplesPerSec;
 335
 336     if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_WBITSPERSAMPLE))
 337     {
 338         if (adfs->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM)
 339             adfs->pwfxDst->wBitsPerSample = 4;
 340         else
 341             adfs->pwfxDst->wBitsPerSample = 16;
 342     }
 343     if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_WFORMATTAG))
 344     {
 345         if (adfs->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM)
 346             adfs->pwfxDst->wFormatTag = WAVE_FORMAT_MPEGLAYER3;
 347         else
 348             adfs->pwfxDst->wFormatTag = WAVE_FORMAT_PCM;
 349     }
 350
 351     /* check if result is ok */
 352     if (MPEG3_GetFormatIndex(adfs->pwfxDst) == 0xFFFFFFFF) return ACMERR_NOTPOSSIBLE;
 353
 354     /* recompute other values */
 355     switch (adfs->pwfxDst->wFormatTag)
 356     {
 357     case WAVE_FORMAT_PCM:
 358         adfs->pwfxDst->nBlockAlign = (adfs->pwfxDst->nChannels * adfs->pwfxDst->wBitsPerSample) / 8;
 359         adfs->pwfxDst->nAvgBytesPerSec = adfs->pwfxDst->nSamplesPerSec * adfs->pwfxDst->nBlockAlign;
 360         break;
 361     case WAVE_FORMAT_MPEGLAYER3:
 362         adfs->pwfxDst->nBlockAlign = 1;
 363         fill_in_wfx(adfs->cbwfxDst, adfs->pwfxDst, 192000);
 364         break;
 365     default:
 366         FIXME("\n");
 367         break;
 368     }
 369
 370     return MMSYSERR_NOERROR;
 371 }
 372
 373 /***********************************************************************
 374  *           MPEG3_Reset
 375  *
 376  */
 377 static  void    MPEG3_Reset(PACMDRVSTREAMINSTANCE adsi, AcmMpeg3Data* aad)
 378 {
 379     ExitMP3(&aad->mp);
 380     InitMP3(&aad->mp);
 381 }
 382
 383 /***********************************************************************
 384  *           MPEG3_StreamOpen
 385  *
 386  */
 387 static  LRESULT MPEG3_StreamOpen(PACMDRVSTREAMINSTANCE adsi)
 388 {
 389     AcmMpeg3Data*       aad;
 390
 391     assert(!(adsi->fdwOpen & ACM_STREAMOPENF_ASYNC));
 392
 393     if (MPEG3_GetFormatIndex(adsi->pwfxSrc) == 0xFFFFFFFF ||
 394         MPEG3_GetFormatIndex(adsi->pwfxDst) == 0xFFFFFFFF)
 395         return ACMERR_NOTPOSSIBLE;
 396
 397     aad = HeapAlloc(GetProcessHeap(), 0, sizeof(AcmMpeg3Data));
 398     if (aad == 0) return MMSYSERR_NOMEM;
 399
 400     adsi->dwDriver = (DWORD)aad;
 401
 402     if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
 403         adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
 404     {
 405         goto theEnd;
 406     }
 407     else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_MPEGLAYER3 &&
 408              adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
 409     {
 410         /* resampling or mono <=> stereo not available
 411          * MPEG3 algo only define 16 bit per sample output
 412          */
 413         if (adsi->pwfxSrc->nSamplesPerSec != adsi->pwfxDst->nSamplesPerSec ||
 414             adsi->pwfxSrc->nChannels != adsi->pwfxDst->nChannels ||
 415             adsi->pwfxDst->wBitsPerSample != 16)
 416             goto theEnd;
 417         aad->convert = mp3_horse;
 418         InitMP3(&aad->mp);
 419     }
 420     /* no encoding yet
 421     else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
 422              adsi->pwfxDst->wFormatTag == WAVE_FORMAT_MPEGLAYER3)
 423     */
 424     else goto theEnd;
 425     MPEG3_Reset(adsi, aad);
 426
 427     return MMSYSERR_NOERROR;
 428
 429  theEnd:
 430     HeapFree(GetProcessHeap(), 0, aad);
 431     adsi->dwDriver = 0L;
 432     return MMSYSERR_NOTSUPPORTED;
 433 }
 434
 435 /***********************************************************************
 436  *           MPEG3_StreamClose
 437  *
 438  */
 439 static  LRESULT MPEG3_StreamClose(PACMDRVSTREAMINSTANCE adsi)
 440 {
 441     ExitMP3(&((AcmMpeg3Data*)adsi->dwDriver)->mp);
 442     HeapFree(GetProcessHeap(), 0, (void*)adsi->dwDriver);
 443     return MMSYSERR_NOERROR;
 444 }
 445
 446 /***********************************************************************
 447  *           MPEG3_StreamSize
 448  *
 449  */
 450 static  LRESULT MPEG3_StreamSize(PACMDRVSTREAMINSTANCE adsi, PACMDRVSTREAMSIZE adss)
 451 {
 452     switch (adss->fdwSize)
 453     {
 454     case ACM_STREAMSIZEF_DESTINATION:
 455         /* cbDstLength => cbSrcLength */
 456         if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
 457             adsi->pwfxDst->wFormatTag == WAVE_FORMAT_MPEGLAYER3)
 458         {
 459             /* don't take block overhead into account, doesn't matter too much */
 460             adss->cbSrcLength = adss->cbDstLength * 12;
 461         }
 462         else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_MPEGLAYER3 &&
 463                  adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
 464         {
 465             FIXME("misses the block header overhead\n");
 466             adss->cbSrcLength = 256 + adss->cbDstLength / 12;
 467         }
 468         else
 469         {
 470             return MMSYSERR_NOTSUPPORTED;
 471         }
 472         break;
 473     case ACM_STREAMSIZEF_SOURCE:
 474         /* cbSrcLength => cbDstLength */
 475         if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
 476             adsi->pwfxDst->wFormatTag == WAVE_FORMAT_MPEGLAYER3)
 477         {
 478             FIXME("misses the block header overhead\n");
 479             adss->cbDstLength = 256 + adss->cbSrcLength / 12;
 480         }
 481         else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_MPEGLAYER3 &&
 482                  adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
 483         {
 484             /* don't take block overhead into account, doesn't matter too much */
 485             adss->cbDstLength = adss->cbSrcLength * 12;
 486         }
 487         else
 488         {
 489             return MMSYSERR_NOTSUPPORTED;
 490         }
 491         break;
 492     default:
 493         WARN("Unsupported query %08x\n", adss->fdwSize);
 494         return MMSYSERR_NOTSUPPORTED;
 495     }
 496     return MMSYSERR_NOERROR;
 497 }
 498
 499 /***********************************************************************
 500  *           MPEG3_StreamConvert
 501  *
 502  */
 503 static LRESULT MPEG3_StreamConvert(PACMDRVSTREAMINSTANCE adsi, PACMDRVSTREAMHEADER adsh)
 504 {
 505     AcmMpeg3Data*       aad = (AcmMpeg3Data*)adsi->dwDriver;
 506     DWORD               nsrc = adsh->cbSrcLength;
 507     DWORD               ndst = adsh->cbDstLength;
 508
 509     if (adsh->fdwConvert &
 510         ~(ACM_STREAMCONVERTF_BLOCKALIGN|
 511           ACM_STREAMCONVERTF_END|
 512           ACM_STREAMCONVERTF_START))
 513     {
 514         FIXME("Unsupported fdwConvert (%08x), ignoring it\n", adsh->fdwConvert);
 515     }
 516     /* ACM_STREAMCONVERTF_BLOCKALIGN
 517      *  currently all conversions are block aligned, so do nothing for this flag
 518      * ACM_STREAMCONVERTF_END
 519      *  no pending data, so do nothing for this flag
 520      */
 521     if ((adsh->fdwConvert & ACM_STREAMCONVERTF_START))
 522     {
 523         MPEG3_Reset(adsi, aad);
 524     }
 525
 526     aad->convert(adsi, adsh->pbSrc, &nsrc, adsh->pbDst, &ndst);
 527     adsh->cbSrcLengthUsed = nsrc;
 528     adsh->cbDstLengthUsed = ndst;
 529
 530     return MMSYSERR_NOERROR;
 531 }
 532
 533 /**************************************************************************
 534  *                      MPEG3_DriverProc                        [exported]
 535  */
 536 LRESULT CALLBACK MPEG3_DriverProc(DWORD_PTR dwDevID, HDRVR hDriv, UINT wMsg,
 537                                          LPARAM dwParam1, LPARAM dwParam2)
 538 {
 539     TRACE("(%08lx %p %04x %08lx %08lx);\n",
 540           dwDevID, hDriv, wMsg, dwParam1, dwParam2);
 541
 542     switch (wMsg)
 543     {
 544     case DRV_LOAD:              return 1;
 545     case DRV_FREE:              return 1;
 546     case DRV_OPEN:              return MPEG3_drvOpen((LPSTR)dwParam1);
 547     case DRV_CLOSE:             return MPEG3_drvClose(dwDevID);
 548     case DRV_ENABLE:            return 1;
 549     case DRV_DISABLE:           return 1;
 550     case DRV_QUERYCONFIGURE:    return 1;
 551     case DRV_CONFIGURE:         MessageBoxA(0, "MPEG3 filter !", "Wine Driver", MB_OK); return 1;
 552     case DRV_INSTALL:           return DRVCNF_RESTART;
 553     case DRV_REMOVE:            return DRVCNF_RESTART;
 554
 555     case ACMDM_DRIVER_NOTIFY:
 556         /* no caching from other ACM drivers is done so far */
 557         return MMSYSERR_NOERROR;
 558
 559     case ACMDM_DRIVER_DETAILS:
 560         return MPEG3_DriverDetails((PACMDRIVERDETAILSW)dwParam1);
 561
 562     case ACMDM_FORMATTAG_DETAILS:
 563         return MPEG3_FormatTagDetails((PACMFORMATTAGDETAILSW)dwParam1, dwParam2);
 564
 565     case ACMDM_FORMAT_DETAILS:
 566         return MPEG3_FormatDetails((PACMFORMATDETAILSW)dwParam1, dwParam2);
 567
 568     case ACMDM_FORMAT_SUGGEST:
 569         return MPEG3_FormatSuggest((PACMDRVFORMATSUGGEST)dwParam1);
 570
 571     case ACMDM_STREAM_OPEN:
 572         return MPEG3_StreamOpen((PACMDRVSTREAMINSTANCE)dwParam1);
 573
 574     case ACMDM_STREAM_CLOSE:
 575         return MPEG3_StreamClose((PACMDRVSTREAMINSTANCE)dwParam1);
 576
 577     case ACMDM_STREAM_SIZE:
 578         return MPEG3_StreamSize((PACMDRVSTREAMINSTANCE)dwParam1, (PACMDRVSTREAMSIZE)dwParam2);
 579
 580     case ACMDM_STREAM_CONVERT:
 581         return MPEG3_StreamConvert((PACMDRVSTREAMINSTANCE)dwParam1, (PACMDRVSTREAMHEADER)dwParam2);
 582
 583     case ACMDM_HARDWARE_WAVE_CAPS_INPUT:
 584     case ACMDM_HARDWARE_WAVE_CAPS_OUTPUT:
 585         /* this converter is not a hardware driver */
 586     case ACMDM_FILTERTAG_DETAILS:
 587     case ACMDM_FILTER_DETAILS:
 588         /* this converter is not a filter */
 589     case ACMDM_STREAM_RESET:
 590         /* only needed for asynchronous driver... we aren't, so just say it */
 591         return MMSYSERR_NOTSUPPORTED;
 592     case ACMDM_STREAM_PREPARE:
 593     case ACMDM_STREAM_UNPREPARE:
 594         /* nothing special to do here... so don't do anything */
 595         return MMSYSERR_NOERROR;
 596
 597     default:
 598         return DefDriverProc(dwDevID, hDriv, wMsg, dwParam1, dwParam2);
 599     }
 600 }