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     *nsrc -= buffered_after;
 168     ClearMP3Buffer(&amd->mp);
 169 }
 170
 171 /***********************************************************************
 172  *           MPEG3_DriverDetails
 173  *
 174  */
 175 static  LRESULT MPEG3_DriverDetails(PACMDRIVERDETAILSW add)
 176 {
 177     add->fccType = ACMDRIVERDETAILS_FCCTYPE_AUDIOCODEC;
 178     add->fccComp = ACMDRIVERDETAILS_FCCCOMP_UNDEFINED;
 179     add->wMid = 0xFF;
 180     add->wPid = 0x00;
 181     add->vdwACM = 0x01000000;
 182     add->vdwDriver = 0x01000000;
 183     add->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CODEC;
 184     add->cFormatTags = 2; /* PCM, MPEG3 */
 185     add->cFilterTags = 0;
 186     add->hicon = NULL;
 187     MultiByteToWideChar( CP_ACP, 0, "WINE-MPEG3", -1,
 188                          add->szShortName, sizeof(add->szShortName)/sizeof(WCHAR) );
 189     MultiByteToWideChar( CP_ACP, 0, "Wine MPEG3 decoder", -1,
 190                          add->szLongName, sizeof(add->szLongName)/sizeof(WCHAR) );
 191     MultiByteToWideChar( CP_ACP, 0, "Brought to you by the Wine team (based on mpglib by Michael Hipp)...", -1,
 192                          add->szCopyright, sizeof(add->szCopyright)/sizeof(WCHAR) );
 193     MultiByteToWideChar( CP_ACP, 0, "Refer to LICENSE file", -1,
 194                          add->szLicensing, sizeof(add->szLicensing)/sizeof(WCHAR) );
 195     add->szFeatures[0] = 0;
 196
 197     return MMSYSERR_NOERROR;
 198 }
 199
 200 /***********************************************************************
 201  *           MPEG3_FormatTagDetails
 202  *
 203  */
 204 static  LRESULT MPEG3_FormatTagDetails(PACMFORMATTAGDETAILSW aftd, DWORD dwQuery)
 205 {
 206     static const WCHAR szPcm[]={'P','C','M',0};
 207     static const WCHAR szMpeg3[]={'M','P','e','g','3',0};
 208
 209     switch (dwQuery)
 210     {
 211     case ACM_FORMATTAGDETAILSF_INDEX:
 212         if (aftd->dwFormatTagIndex >= 2) return ACMERR_NOTPOSSIBLE;
 213         break;
 214     case ACM_FORMATTAGDETAILSF_LARGESTSIZE:
 215         if (aftd->dwFormatTag == WAVE_FORMAT_UNKNOWN)
 216         {
 217             aftd->dwFormatTagIndex = 1; /* WAVE_FORMAT_MPEGLAYER3 is bigger than PCM */
 218             break;
 219         }
 220         /* fall thru */
 221     case ACM_FORMATTAGDETAILSF_FORMATTAG:
 222         switch (aftd->dwFormatTag)
 223         {
 224         case WAVE_FORMAT_PCM:           aftd->dwFormatTagIndex = 0; break;
 225         case WAVE_FORMAT_MPEGLAYER3:    aftd->dwFormatTagIndex = 1; break;
 226         default:                        return ACMERR_NOTPOSSIBLE;
 227         }
 228         break;
 229     default:
 230         WARN("Unsupported query %08x\n", dwQuery);
 231         return MMSYSERR_NOTSUPPORTED;
 232     }
 233
 234     aftd->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CODEC;
 235     switch (aftd->dwFormatTagIndex)
 236     {
 237     case 0:
 238         aftd->dwFormatTag = WAVE_FORMAT_PCM;
 239         aftd->cbFormatSize = sizeof(PCMWAVEFORMAT);
 240         aftd->cStandardFormats = NUM_PCM_FORMATS;
 241         lstrcpyW(aftd->szFormatTag, szPcm);
 242         break;
 243     case 1:
 244         aftd->dwFormatTag = WAVE_FORMAT_MPEGLAYER3;
 245         aftd->cbFormatSize = sizeof(MPEGLAYER3WAVEFORMAT);
 246         aftd->cStandardFormats = NUM_MPEG3_FORMATS;
 247         lstrcpyW(aftd->szFormatTag, szMpeg3);
 248         break;
 249     }
 250     return MMSYSERR_NOERROR;
 251 }
 252
 253 static void fill_in_wfx(unsigned cbwfx, WAVEFORMATEX* wfx, unsigned bit_rate)
 254 {
 255     MPEGLAYER3WAVEFORMAT*   mp3wfx = (MPEGLAYER3WAVEFORMAT*)wfx;
 256
 257     wfx->nAvgBytesPerSec = bit_rate / 8;
 258     if (cbwfx >= sizeof(WAVEFORMATEX))
 259         wfx->cbSize = sizeof(MPEGLAYER3WAVEFORMAT) - sizeof(WAVEFORMATEX);
 260     if (cbwfx >= sizeof(MPEGLAYER3WAVEFORMAT))
 261     {
 262         mp3wfx->wID = MPEGLAYER3_ID_MPEG;
 263         mp3wfx->fdwFlags = MPEGLAYER3_FLAG_PADDING_OFF;
 264         mp3wfx->nBlockSize = (bit_rate * 144) / wfx->nSamplesPerSec;
 265         mp3wfx->nFramesPerBlock = 1;
 266         mp3wfx->nCodecDelay = 0x0571;
 267     }
 268 }
 269
 270 /***********************************************************************
 271  *           MPEG3_FormatDetails
 272  *
 273  */
 274 static  LRESULT MPEG3_FormatDetails(PACMFORMATDETAILSW afd, DWORD dwQuery)
 275 {
 276     switch (dwQuery)
 277     {
 278     case ACM_FORMATDETAILSF_FORMAT:
 279         if (MPEG3_GetFormatIndex(afd->pwfx) == 0xFFFFFFFF) return ACMERR_NOTPOSSIBLE;
 280         break;
 281     case ACM_FORMATDETAILSF_INDEX:
 282         afd->pwfx->wFormatTag = afd->dwFormatTag;
 283         switch (afd->dwFormatTag)
 284         {
 285         case WAVE_FORMAT_PCM:
 286             if (afd->dwFormatIndex >= NUM_PCM_FORMATS) return ACMERR_NOTPOSSIBLE;
 287             afd->pwfx->nChannels = PCM_Formats[afd->dwFormatIndex].nChannels;
 288             afd->pwfx->nSamplesPerSec = PCM_Formats[afd->dwFormatIndex].rate;
 289             afd->pwfx->wBitsPerSample = PCM_Formats[afd->dwFormatIndex].nBits;
 290             /* native MSACM uses a PCMWAVEFORMAT structure, so cbSize is not accessible
 291              * afd->pwfx->cbSize = 0;
 292              */
 293             afd->pwfx->nBlockAlign =
 294                 (afd->pwfx->nChannels * afd->pwfx->wBitsPerSample) / 8;
 295             afd->pwfx->nAvgBytesPerSec =
 296                 afd->pwfx->nSamplesPerSec * afd->pwfx->nBlockAlign;
 297             break;
 298         case WAVE_FORMAT_MPEGLAYER3:
 299             if (afd->dwFormatIndex >= NUM_MPEG3_FORMATS) return ACMERR_NOTPOSSIBLE;
 300             afd->pwfx->nChannels = MPEG3_Formats[afd->dwFormatIndex].nChannels;
 301             afd->pwfx->nSamplesPerSec = MPEG3_Formats[afd->dwFormatIndex].rate;
 302             afd->pwfx->wBitsPerSample = MPEG3_Formats[afd->dwFormatIndex].nBits;
 303             afd->pwfx->nBlockAlign = 1;
 304             fill_in_wfx(afd->cbwfx, afd->pwfx, 192000);
 305             break;
 306         default:
 307             WARN("Unsupported tag %08x\n", afd->dwFormatTag);
 308             return MMSYSERR_INVALPARAM;
 309         }
 310         break;
 311     default:
 312         WARN("Unsupported query %08x\n", dwQuery);
 313         return MMSYSERR_NOTSUPPORTED;
 314     }
 315     afd->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CODEC;
 316     afd->szFormat[0] = 0; /* let MSACM format this for us... */
 317
 318     return MMSYSERR_NOERROR;
 319 }
 320
 321 /***********************************************************************
 322  *           MPEG3_FormatSuggest
 323  *
 324  */
 325 static  LRESULT MPEG3_FormatSuggest(PACMDRVFORMATSUGGEST adfs)
 326 {
 327     /* some tests ... */
 328     if (adfs->cbwfxSrc < sizeof(PCMWAVEFORMAT) ||
 329         adfs->cbwfxDst < sizeof(PCMWAVEFORMAT) ||
 330         MPEG3_GetFormatIndex(adfs->pwfxSrc) == 0xFFFFFFFF) return ACMERR_NOTPOSSIBLE;
 331     /* FIXME: should do those tests against the real size (according to format tag */
 332
 333     /* If no suggestion for destination, then copy source value */
 334     if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_NCHANNELS))
 335         adfs->pwfxDst->nChannels = adfs->pwfxSrc->nChannels;
 336     if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_NSAMPLESPERSEC))
 337         adfs->pwfxDst->nSamplesPerSec = adfs->pwfxSrc->nSamplesPerSec;
 338
 339     if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_WBITSPERSAMPLE))
 340     {
 341         if (adfs->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM)
 342             adfs->pwfxDst->wBitsPerSample = 4;
 343         else
 344             adfs->pwfxDst->wBitsPerSample = 16;
 345     }
 346     if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_WFORMATTAG))
 347     {
 348         if (adfs->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM)
 349             adfs->pwfxDst->wFormatTag = WAVE_FORMAT_MPEGLAYER3;
 350         else
 351             adfs->pwfxDst->wFormatTag = WAVE_FORMAT_PCM;
 352     }
 353
 354     /* check if result is ok */
 355     if (MPEG3_GetFormatIndex(adfs->pwfxDst) == 0xFFFFFFFF) return ACMERR_NOTPOSSIBLE;
 356
 357     /* recompute other values */
 358     switch (adfs->pwfxDst->wFormatTag)
 359     {
 360     case WAVE_FORMAT_PCM:
 361         adfs->pwfxDst->nBlockAlign = (adfs->pwfxDst->nChannels * adfs->pwfxDst->wBitsPerSample) / 8;
 362         adfs->pwfxDst->nAvgBytesPerSec = adfs->pwfxDst->nSamplesPerSec * adfs->pwfxDst->nBlockAlign;
 363         break;
 364     case WAVE_FORMAT_MPEGLAYER3:
 365         adfs->pwfxDst->nBlockAlign = 1;
 366         fill_in_wfx(adfs->cbwfxDst, adfs->pwfxDst, 192000);
 367         break;
 368     default:
 369         FIXME("\n");
 370         break;
 371     }
 372
 373     return MMSYSERR_NOERROR;
 374 }
 375
 376 /***********************************************************************
 377  *           MPEG3_Reset
 378  *
 379  */
 380 static  void    MPEG3_Reset(PACMDRVSTREAMINSTANCE adsi, AcmMpeg3Data* aad)
 381 {
 382     ClearMP3Buffer(&aad->mp);
 383     InitMP3(&aad->mp);
 384 }
 385
 386 /***********************************************************************
 387  *           MPEG3_StreamOpen
 388  *
 389  */
 390 static  LRESULT MPEG3_StreamOpen(PACMDRVSTREAMINSTANCE adsi)
 391 {
 392     AcmMpeg3Data*       aad;
 393
 394     assert(!(adsi->fdwOpen & ACM_STREAMOPENF_ASYNC));
 395
 396     if (MPEG3_GetFormatIndex(adsi->pwfxSrc) == 0xFFFFFFFF ||
 397         MPEG3_GetFormatIndex(adsi->pwfxDst) == 0xFFFFFFFF)
 398         return ACMERR_NOTPOSSIBLE;
 399
 400     aad = HeapAlloc(GetProcessHeap(), 0, sizeof(AcmMpeg3Data));
 401     if (aad == 0) return MMSYSERR_NOMEM;
 402
 403     adsi->dwDriver = (DWORD)aad;
 404
 405     if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
 406         adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
 407     {
 408         goto theEnd;
 409     }
 410     else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_MPEGLAYER3 &&
 411              adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
 412     {
 413         /* resampling or mono <=> stereo not available
 414          * MPEG3 algo only define 16 bit per sample output
 415          */
 416         if (adsi->pwfxSrc->nSamplesPerSec != adsi->pwfxDst->nSamplesPerSec ||
 417             adsi->pwfxSrc->nChannels != adsi->pwfxDst->nChannels ||
 418             adsi->pwfxDst->wBitsPerSample != 16)
 419             goto theEnd;
 420         aad->convert = mp3_horse;
 421         InitMP3(&aad->mp);
 422     }
 423     /* no encoding yet
 424     else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
 425              adsi->pwfxDst->wFormatTag == WAVE_FORMAT_MPEGLAYER3)
 426     */
 427     else goto theEnd;
 428     MPEG3_Reset(adsi, aad);
 429
 430     return MMSYSERR_NOERROR;
 431
 432  theEnd:
 433     HeapFree(GetProcessHeap(), 0, aad);
 434     adsi->dwDriver = 0L;
 435     return MMSYSERR_NOTSUPPORTED;
 436 }
 437
 438 /***********************************************************************
 439  *           MPEG3_StreamClose
 440  *
 441  */
 442 static  LRESULT MPEG3_StreamClose(PACMDRVSTREAMINSTANCE adsi)
 443 {
 444     ClearMP3Buffer(&((AcmMpeg3Data*)adsi->dwDriver)->mp);
 445     HeapFree(GetProcessHeap(), 0, (void*)adsi->dwDriver);
 446     return MMSYSERR_NOERROR;
 447 }
 448
 449 /***********************************************************************
 450  *           MPEG3_StreamSize
 451  *
 452  */
 453 static  LRESULT MPEG3_StreamSize(PACMDRVSTREAMINSTANCE adsi, PACMDRVSTREAMSIZE adss)
 454 {
 455     switch (adss->fdwSize)
 456     {
 457     case ACM_STREAMSIZEF_DESTINATION:
 458         /* cbDstLength => cbSrcLength */
 459         if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
 460             adsi->pwfxDst->wFormatTag == WAVE_FORMAT_MPEGLAYER3)
 461         {
 462             /* don't take block overhead into account, doesn't matter too much */
 463             adss->cbSrcLength = adss->cbDstLength * 12;
 464         }
 465         else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_MPEGLAYER3 &&
 466                  adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
 467         {
 468             FIXME("misses the block header overhead\n");
 469             adss->cbSrcLength = 256 + adss->cbDstLength / 12;
 470         }
 471         else
 472         {
 473             return MMSYSERR_NOTSUPPORTED;
 474         }
 475         break;
 476     case ACM_STREAMSIZEF_SOURCE:
 477         /* cbSrcLength => cbDstLength */
 478         if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
 479             adsi->pwfxDst->wFormatTag == WAVE_FORMAT_MPEGLAYER3)
 480         {
 481             FIXME("misses the block header overhead\n");
 482             adss->cbDstLength = 256 + adss->cbSrcLength / 12;
 483         }
 484         else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_MPEGLAYER3 &&
 485                  adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
 486         {
 487             /* don't take block overhead into account, doesn't matter too much */
 488             adss->cbDstLength = adss->cbSrcLength * 12;
 489         }
 490         else
 491         {
 492             return MMSYSERR_NOTSUPPORTED;
 493         }
 494         break;
 495     default:
 496         WARN("Unsupported query %08x\n", adss->fdwSize);
 497         return MMSYSERR_NOTSUPPORTED;
 498     }
 499     return MMSYSERR_NOERROR;
 500 }
 501
 502 /***********************************************************************
 503  *           MPEG3_StreamConvert
 504  *
 505  */
 506 static LRESULT MPEG3_StreamConvert(PACMDRVSTREAMINSTANCE adsi, PACMDRVSTREAMHEADER adsh)
 507 {
 508     AcmMpeg3Data*       aad = (AcmMpeg3Data*)adsi->dwDriver;
 509     DWORD               nsrc = adsh->cbSrcLength;
 510     DWORD               ndst = adsh->cbDstLength;
 511
 512     if (adsh->fdwConvert &
 513         ~(ACM_STREAMCONVERTF_BLOCKALIGN|
 514           ACM_STREAMCONVERTF_END|
 515           ACM_STREAMCONVERTF_START))
 516     {
 517         FIXME("Unsupported fdwConvert (%08x), ignoring it\n", adsh->fdwConvert);
 518     }
 519     /* ACM_STREAMCONVERTF_BLOCKALIGN
 520      *  currently all conversions are block aligned, so do nothing for this flag
 521      * ACM_STREAMCONVERTF_END
 522      *  no pending data, so do nothing for this flag
 523      */
 524     if ((adsh->fdwConvert & ACM_STREAMCONVERTF_START))
 525     {
 526         MPEG3_Reset(adsi, aad);
 527     }
 528
 529     aad->convert(adsi, adsh->pbSrc, &nsrc, adsh->pbDst, &ndst);
 530     adsh->cbSrcLengthUsed = nsrc;
 531     adsh->cbDstLengthUsed = ndst;
 532
 533     return MMSYSERR_NOERROR;
 534 }
 535
 536 /**************************************************************************
 537  *                      MPEG3_DriverProc                        [exported]
 538  */
 539 LRESULT CALLBACK MPEG3_DriverProc(DWORD_PTR dwDevID, HDRVR hDriv, UINT wMsg,
 540                                          LPARAM dwParam1, LPARAM dwParam2)
 541 {
 542     TRACE("(%08lx %p %04x %08lx %08lx);\n",
 543           dwDevID, hDriv, wMsg, dwParam1, dwParam2);
 544
 545     switch (wMsg)
 546     {
 547     case DRV_LOAD:              return 1;
 548     case DRV_FREE:              return 1;
 549     case DRV_OPEN:              return MPEG3_drvOpen((LPSTR)dwParam1);
 550     case DRV_CLOSE:             return MPEG3_drvClose(dwDevID);
 551     case DRV_ENABLE:            return 1;
 552     case DRV_DISABLE:           return 1;
 553     case DRV_QUERYCONFIGURE:    return 1;
 554     case DRV_CONFIGURE:         MessageBoxA(0, "MPEG3 filter !", "Wine Driver", MB_OK); return 1;
 555     case DRV_INSTALL:           return DRVCNF_RESTART;
 556     case DRV_REMOVE:            return DRVCNF_RESTART;
 557
 558     case ACMDM_DRIVER_NOTIFY:
 559         /* no caching from other ACM drivers is done so far */
 560         return MMSYSERR_NOERROR;
 561
 562     case ACMDM_DRIVER_DETAILS:
 563         return MPEG3_DriverDetails((PACMDRIVERDETAILSW)dwParam1);
 564
 565     case ACMDM_FORMATTAG_DETAILS:
 566         return MPEG3_FormatTagDetails((PACMFORMATTAGDETAILSW)dwParam1, dwParam2);
 567
 568     case ACMDM_FORMAT_DETAILS:
 569         return MPEG3_FormatDetails((PACMFORMATDETAILSW)dwParam1, dwParam2);
 570
 571     case ACMDM_FORMAT_SUGGEST:
 572         return MPEG3_FormatSuggest((PACMDRVFORMATSUGGEST)dwParam1);
 573
 574     case ACMDM_STREAM_OPEN:
 575         return MPEG3_StreamOpen((PACMDRVSTREAMINSTANCE)dwParam1);
 576
 577     case ACMDM_STREAM_CLOSE:
 578         return MPEG3_StreamClose((PACMDRVSTREAMINSTANCE)dwParam1);
 579
 580     case ACMDM_STREAM_SIZE:
 581         return MPEG3_StreamSize((PACMDRVSTREAMINSTANCE)dwParam1, (PACMDRVSTREAMSIZE)dwParam2);
 582
 583     case ACMDM_STREAM_CONVERT:
 584         return MPEG3_StreamConvert((PACMDRVSTREAMINSTANCE)dwParam1, (PACMDRVSTREAMHEADER)dwParam2);
 585
 586     case ACMDM_HARDWARE_WAVE_CAPS_INPUT:
 587     case ACMDM_HARDWARE_WAVE_CAPS_OUTPUT:
 588         /* this converter is not a hardware driver */
 589     case ACMDM_FILTERTAG_DETAILS:
 590     case ACMDM_FILTER_DETAILS:
 591         /* this converter is not a filter */
 592     case ACMDM_STREAM_RESET:
 593         /* only needed for asynchronous driver... we aren't, so just say it */
 594         return MMSYSERR_NOTSUPPORTED;
 595     case ACMDM_STREAM_PREPARE:
 596     case ACMDM_STREAM_UNPREPARE:
 597         /* nothing special to do here... so don't do anything */
 598         return MMSYSERR_NOERROR;
 599
 600     default:
 601         return DefDriverProc(dwDevID, hDriv, wMsg, dwParam1, dwParam2);
 602     }
 603 }