dlls/msacm/winemp3/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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  */
  21
  22 #include <assert.h>
  23 #include <string.h>
  24 #include "winnls.h"
  25 #include "winbase.h"
  26 #include "wingdi.h"
  27 #include "winuser.h"
  28 #include "msacm.h"
  29 #include "mmreg.h"
  30 #include "../msacmdrv.h"
  31 #include "mpg123.h"
  32 #include "mpglib.h"
  33
  34 #include "wine/debug.h"
  35
  36 WINE_DEFAULT_DEBUG_CHANNEL(mpeg3);
  37
  38 /***********************************************************************
  39  *           MPEG3_drvOpen
  40  */
  41 static  DWORD   MPEG3_drvOpen(LPCSTR str)
  42 {
  43     return 1;
  44 }
  45
  46 /***********************************************************************
  47  *           MPEG3_drvClose
  48  */
  49 static  DWORD   MPEG3_drvClose(DWORD dwDevID)
  50 {
  51     return 1;
  52 }
  53
  54 typedef struct tagAcmMpeg3Data
  55 {
  56     void (*convert)(PACMDRVSTREAMINSTANCE adsi,
  57                     const unsigned char*, LPDWORD, unsigned char*, LPDWORD);
  58     struct mpstr mp;
  59 } AcmMpeg3Data;
  60
  61 /* table to list all supported formats... those are the basic ones. this
  62  * also helps given a unique index to each of the supported formats
  63  */
  64 typedef struct
  65 {
  66     int         nChannels;
  67     int         nBits;
  68     int         rate;
  69 } Format;
  70
  71 static Format PCM_Formats[] =
  72 {
  73     {1,  8,  8000}, {2,  8,  8000}, {1, 16,  8000}, {2, 16,  8000},
  74     {1,  8, 11025}, {2,  8, 11025}, {1, 16, 11025}, {2, 16, 11025},
  75     {1,  8, 22050}, {2,  8, 22050}, {1, 16, 22050}, {2, 16, 22050},
  76     {1,  8, 44100}, {2,  8, 44100}, {1, 16, 44100}, {2, 16, 44100},
  77 };
  78
  79 static Format MPEG3_Formats[] =
  80 {
  81     {1,  0,  8000}, {2, 0,  8000},  {1,  0, 11025}, {2,  0, 11025},
  82     {1,  0, 22050}, {2, 0, 22050},  {1,  0, 44100}, {2,  0, 44100},
  83 };
  84
  85 #define NUM_PCM_FORMATS         (sizeof(PCM_Formats) / sizeof(PCM_Formats[0]))
  86 #define NUM_MPEG3_FORMATS       (sizeof(MPEG3_Formats) / sizeof(MPEG3_Formats[0]))
  87
  88 /***********************************************************************
  89  *           MPEG3_GetFormatIndex
  90  */
  91 static  DWORD   MPEG3_GetFormatIndex(LPWAVEFORMATEX wfx)
  92 {
  93     int         i, hi;
  94     Format*     fmts;
  95
  96     switch (wfx->wFormatTag)
  97     {
  98     case WAVE_FORMAT_PCM:
  99         hi = NUM_PCM_FORMATS;
 100         fmts = PCM_Formats;
 101         break;
 102     case WAVE_FORMAT_MPEGLAYER3:
 103         hi = NUM_MPEG3_FORMATS;
 104         fmts = MPEG3_Formats;
 105         break;
 106     default:
 107         return 0xFFFFFFFF;
 108     }
 109
 110     for (i = 0; i < hi; i++)
 111     {
 112         if (wfx->nChannels == fmts[i].nChannels &&
 113             wfx->nSamplesPerSec == fmts[i].rate &&
 114             wfx->wBitsPerSample == fmts[i].nBits)
 115             return i;
 116     }
 117
 118     return 0xFFFFFFFF;
 119 }
 120
 121 /***********************************************************************
 122  *           R16
 123  *
 124  * Read a 16 bit sample (correctly handles endianess)
 125  */
 126 static inline short  R16(const unsigned char* src)
 127 {
 128     return (short)((unsigned short)src[0] | ((unsigned short)src[1] << 8));
 129 }
 130
 131 /***********************************************************************
 132  *           W16
 133  *
 134  * Write a 16 bit sample (correctly handles endianess)
 135  */
 136 static inline void  W16(unsigned char* dst, short s)
 137 {
 138     dst[0] = LOBYTE(s);
 139     dst[1] = HIBYTE(s);
 140 }
 141
 142 static void mp3_horse(PACMDRVSTREAMINSTANCE adsi,
 143                       const unsigned char* src, LPDWORD nsrc,
 144                       unsigned char* dst, LPDWORD ndst)
 145 {
 146     AcmMpeg3Data*       amd = (AcmMpeg3Data*)adsi->dwDriver;
 147     int                 size, ret;
 148     DWORD               dpos = 0;
 149
 150     ret = decodeMP3(&amd->mp, (unsigned char*)src, *nsrc, dst, *ndst, &size);
 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
 165 /***********************************************************************
 166  *           MPEG3_DriverDetails
 167  *
 168  */
 169 static  LRESULT MPEG3_DriverDetails(PACMDRIVERDETAILSW add)
 170 {
 171     add->fccType = ACMDRIVERDETAILS_FCCTYPE_AUDIOCODEC;
 172     add->fccComp = ACMDRIVERDETAILS_FCCCOMP_UNDEFINED;
 173     add->wMid = 0xFF;
 174     add->wPid = 0x00;
 175     add->vdwACM = 0x01000000;
 176     add->vdwDriver = 0x01000000;
 177     add->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CODEC;
 178     add->cFormatTags = 2; /* PCM, MPEG3 */
 179     add->cFilterTags = 0;
 180     add->hicon = NULL;
 181     MultiByteToWideChar( CP_ACP, 0, "WINE-MPEG3", -1,
 182                          add->szShortName, sizeof(add->szShortName)/sizeof(WCHAR) );
 183     MultiByteToWideChar( CP_ACP, 0, "Wine MPEG3 decoder", -1,
 184                          add->szLongName, sizeof(add->szLongName)/sizeof(WCHAR) );
 185     MultiByteToWideChar( CP_ACP, 0, "Brought to you by the Wine team (based on mpglib by Michael Hipp)...", -1,
 186                          add->szCopyright, sizeof(add->szCopyright)/sizeof(WCHAR) );
 187     MultiByteToWideChar( CP_ACP, 0, "Refer to LICENSE file", -1,
 188                          add->szLicensing, sizeof(add->szLicensing)/sizeof(WCHAR) );
 189     add->szFeatures[0] = 0;
 190
 191     return MMSYSERR_NOERROR;
 192 }
 193
 194 /***********************************************************************
 195  *           MPEG3_FormatTagDetails
 196  *
 197  */
 198 static  LRESULT MPEG3_FormatTagDetails(PACMFORMATTAGDETAILSW aftd, DWORD dwQuery)
 199 {
 200     static WCHAR szPcm[]={'P','C','M',0};
 201     static WCHAR szMpeg3[]={'M','P','e','g','3',0};
 202
 203     switch (dwQuery)
 204     {
 205     case ACM_FORMATTAGDETAILSF_INDEX:
 206         if (aftd->dwFormatTagIndex >= 2) return ACMERR_NOTPOSSIBLE;
 207         break;
 208     case ACM_FORMATTAGDETAILSF_LARGESTSIZE:
 209         if (aftd->dwFormatTag == WAVE_FORMAT_UNKNOWN)
 210         {
 211             aftd->dwFormatTagIndex = 1; /* WAVE_FORMAT_MPEGLAYER3 is bigger than PCM */
 212             break;
 213         }
 214         /* fall thru */
 215     case ACM_FORMATTAGDETAILSF_FORMATTAG:
 216         switch (aftd->dwFormatTag)
 217         {
 218         case WAVE_FORMAT_PCM:           aftd->dwFormatTagIndex = 0; break;
 219         case WAVE_FORMAT_MPEGLAYER3:    aftd->dwFormatTagIndex = 1; break;
 220         default:                        return ACMERR_NOTPOSSIBLE;
 221         }
 222         break;
 223     default:
 224         WARN("Unsupported query %08lx\n", dwQuery);
 225         return MMSYSERR_NOTSUPPORTED;
 226     }
 227
 228     aftd->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CODEC;
 229     switch (aftd->dwFormatTagIndex)
 230     {
 231     case 0:
 232         aftd->dwFormatTag = WAVE_FORMAT_PCM;
 233         aftd->cbFormatSize = sizeof(PCMWAVEFORMAT);
 234         aftd->cStandardFormats = NUM_PCM_FORMATS;
 235         lstrcpyW(aftd->szFormatTag, szPcm);
 236         break;
 237     case 1:
 238         aftd->dwFormatTag = WAVE_FORMAT_MPEGLAYER3;
 239         aftd->cbFormatSize = sizeof(MPEGLAYER3WAVEFORMAT);
 240         aftd->cStandardFormats = NUM_MPEG3_FORMATS;
 241         lstrcpyW(aftd->szFormatTag, szMpeg3);
 242         break;
 243     }
 244     return MMSYSERR_NOERROR;
 245 }
 246
 247 static void fill_in_wfx(unsigned cbwfx, WAVEFORMATEX* wfx, unsigned bit_rate)
 248 {
 249     MPEGLAYER3WAVEFORMAT*   mp3wfx = (MPEGLAYER3WAVEFORMAT*)wfx;
 250
 251     wfx->nAvgBytesPerSec = bit_rate / 8;
 252     if (cbwfx >= sizeof(WAVEFORMATEX))
 253         wfx->cbSize = sizeof(MPEGLAYER3WAVEFORMAT) - sizeof(WAVEFORMATEX);
 254     if (cbwfx >= sizeof(MPEGLAYER3WAVEFORMAT))
 255     {
 256         mp3wfx->wID = MPEGLAYER3_ID_MPEG;
 257         mp3wfx->fdwFlags = MPEGLAYER3_FLAG_PADDING_OFF;
 258         mp3wfx->nBlockSize = (bit_rate * 144) / wfx->nSamplesPerSec;
 259         mp3wfx->nFramesPerBlock = 1;
 260         mp3wfx->nCodecDelay = 0x0571;
 261     }
 262 }
 263
 264 /***********************************************************************
 265  *           MPEG3_FormatDetails
 266  *
 267  */
 268 static  LRESULT MPEG3_FormatDetails(PACMFORMATDETAILSW afd, DWORD dwQuery)
 269 {
 270     switch (dwQuery)
 271     {
 272     case ACM_FORMATDETAILSF_FORMAT:
 273         if (MPEG3_GetFormatIndex(afd->pwfx) == 0xFFFFFFFF) return ACMERR_NOTPOSSIBLE;
 274         break;
 275     case ACM_FORMATDETAILSF_INDEX:
 276         afd->pwfx->wFormatTag = afd->dwFormatTag;
 277         switch (afd->dwFormatTag)
 278         {
 279         case WAVE_FORMAT_PCM:
 280             if (afd->dwFormatIndex >= NUM_PCM_FORMATS) return ACMERR_NOTPOSSIBLE;
 281             afd->pwfx->nChannels = PCM_Formats[afd->dwFormatIndex].nChannels;
 282             afd->pwfx->nSamplesPerSec = PCM_Formats[afd->dwFormatIndex].rate;
 283             afd->pwfx->wBitsPerSample = PCM_Formats[afd->dwFormatIndex].nBits;
 284             /* native MSACM uses a PCMWAVEFORMAT structure, so cbSize is not accessible
 285              * afd->pwfx->cbSize = 0;
 286              */
 287             afd->pwfx->nBlockAlign =
 288                 (afd->pwfx->nChannels * afd->pwfx->wBitsPerSample) / 8;
 289             afd->pwfx->nAvgBytesPerSec =
 290                 afd->pwfx->nSamplesPerSec * afd->pwfx->nBlockAlign;
 291             break;
 292         case WAVE_FORMAT_MPEGLAYER3:
 293             if (afd->dwFormatIndex >= NUM_MPEG3_FORMATS) return ACMERR_NOTPOSSIBLE;
 294             afd->pwfx->nChannels = MPEG3_Formats[afd->dwFormatIndex].nChannels;
 295             afd->pwfx->nSamplesPerSec = MPEG3_Formats[afd->dwFormatIndex].rate;
 296             afd->pwfx->wBitsPerSample = MPEG3_Formats[afd->dwFormatIndex].nBits;
 297             afd->pwfx->nBlockAlign = 1;
 298             fill_in_wfx(afd->cbwfx, afd->pwfx, 192000);
 299             break;
 300         default:
 301             WARN("Unsupported tag %08lx\n", afd->dwFormatTag);
 302             return MMSYSERR_INVALPARAM;
 303         }
 304         break;
 305     default:
 306         WARN("Unsupported query %08lx\n", dwQuery);
 307         return MMSYSERR_NOTSUPPORTED;
 308     }
 309     afd->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CODEC;
 310     afd->szFormat[0] = 0; /* let MSACM format this for us... */
 311
 312     return MMSYSERR_NOERROR;
 313 }
 314
 315 /***********************************************************************
 316  *           MPEG3_FormatSuggest
 317  *
 318  */
 319 static  LRESULT MPEG3_FormatSuggest(PACMDRVFORMATSUGGEST adfs)
 320 {
 321     /* some tests ... */
 322     if (adfs->cbwfxSrc < sizeof(PCMWAVEFORMAT) ||
 323         adfs->cbwfxDst < sizeof(PCMWAVEFORMAT) ||
 324         MPEG3_GetFormatIndex(adfs->pwfxSrc) == 0xFFFFFFFF) return ACMERR_NOTPOSSIBLE;
 325     /* FIXME: should do those tests against the real size (according to format tag */
 326
 327     /* If no suggestion for destination, then copy source value */
 328     if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_NCHANNELS))
 329         adfs->pwfxDst->nChannels = adfs->pwfxSrc->nChannels;
 330     if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_NSAMPLESPERSEC))
 331         adfs->pwfxDst->nSamplesPerSec = adfs->pwfxSrc->nSamplesPerSec;
 332
 333     if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_WBITSPERSAMPLE))
 334     {
 335         if (adfs->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM)
 336             adfs->pwfxDst->wBitsPerSample = 4;
 337         else
 338             adfs->pwfxDst->wBitsPerSample = 16;
 339     }
 340     if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_WFORMATTAG))
 341     {
 342         if (adfs->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM)
 343             adfs->pwfxDst->wFormatTag = WAVE_FORMAT_MPEGLAYER3;
 344         else
 345             adfs->pwfxDst->wFormatTag = WAVE_FORMAT_PCM;
 346     }
 347
 348     /* check if result is ok */
 349     if (MPEG3_GetFormatIndex(adfs->pwfxDst) == 0xFFFFFFFF) return ACMERR_NOTPOSSIBLE;
 350
 351     /* recompute other values */
 352     switch (adfs->pwfxDst->wFormatTag)
 353     {
 354     case WAVE_FORMAT_PCM:
 355         adfs->pwfxDst->nBlockAlign = (adfs->pwfxDst->nChannels * adfs->pwfxDst->wBitsPerSample) / 8;
 356         adfs->pwfxDst->nAvgBytesPerSec = adfs->pwfxDst->nSamplesPerSec * adfs->pwfxDst->nBlockAlign;
 357         break;
 358     case WAVE_FORMAT_MPEGLAYER3:
 359         adfs->pwfxDst->nBlockAlign = 1;
 360         fill_in_wfx(adfs->cbwfxDst, adfs->pwfxDst, 192000);
 361         break;
 362     default:
 363         FIXME("\n");
 364         break;
 365     }
 366
 367     return MMSYSERR_NOERROR;
 368 }
 369
 370 /***********************************************************************
 371  *           MPEG3_Reset
 372  *
 373  */
 374 static  void    MPEG3_Reset(PACMDRVSTREAMINSTANCE adsi, AcmMpeg3Data* aad)
 375 {
 376 }
 377
 378 /***********************************************************************
 379  *           MPEG3_StreamOpen
 380  *
 381  */
 382 static  LRESULT MPEG3_StreamOpen(PACMDRVSTREAMINSTANCE adsi)
 383 {
 384     AcmMpeg3Data*       aad;
 385
 386     assert(!(adsi->fdwOpen & ACM_STREAMOPENF_ASYNC));
 387
 388     if (MPEG3_GetFormatIndex(adsi->pwfxSrc) == 0xFFFFFFFF ||
 389         MPEG3_GetFormatIndex(adsi->pwfxDst) == 0xFFFFFFFF)
 390         return ACMERR_NOTPOSSIBLE;
 391
 392     aad = HeapAlloc(GetProcessHeap(), 0, sizeof(AcmMpeg3Data));
 393     if (aad == 0) return MMSYSERR_NOMEM;
 394
 395     adsi->dwDriver = (DWORD)aad;
 396
 397     if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
 398         adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
 399     {
 400         goto theEnd;
 401     }
 402     else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_MPEGLAYER3 &&
 403              adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
 404     {
 405         /* resampling or mono <=> stereo not available
 406          * MPEG3 algo only define 16 bit per sample output
 407          */
 408         if (adsi->pwfxSrc->nSamplesPerSec != adsi->pwfxDst->nSamplesPerSec ||
 409             adsi->pwfxSrc->nChannels != adsi->pwfxDst->nChannels ||
 410             adsi->pwfxDst->wBitsPerSample != 16)
 411             goto theEnd;
 412         aad->convert = mp3_horse;
 413         InitMP3(&aad->mp);
 414     }
 415     /* no encoding yet
 416     else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
 417              adsi->pwfxDst->wFormatTag == WAVE_FORMAT_MPEGLAYER3)
 418     */
 419     else goto theEnd;
 420     MPEG3_Reset(adsi, aad);
 421
 422     return MMSYSERR_NOERROR;
 423
 424  theEnd:
 425     HeapFree(GetProcessHeap(), 0, aad);
 426     adsi->dwDriver = 0L;
 427     return MMSYSERR_NOTSUPPORTED;
 428 }
 429
 430 /***********************************************************************
 431  *           MPEG3_StreamClose
 432  *
 433  */
 434 static  LRESULT MPEG3_StreamClose(PACMDRVSTREAMINSTANCE adsi)
 435 {
 436     ExitMP3(&((AcmMpeg3Data*)adsi->dwDriver)->mp);
 437     HeapFree(GetProcessHeap(), 0, (void*)adsi->dwDriver);
 438     return MMSYSERR_NOERROR;
 439 }
 440
 441 /***********************************************************************
 442  *           MPEG3_round
 443  *
 444  */
 445 static  inline DWORD    MPEG3_round(DWORD a, DWORD b, DWORD c)
 446 {
 447     assert(a && b && c);
 448     /* to be sure, always return an entire number of c... */
 449     return ((double)a * (double)b + (double)c - 1) / (double)c;
 450 }
 451
 452 /***********************************************************************
 453  *           MPEG3_StreamSize
 454  *
 455  */
 456 static  LRESULT MPEG3_StreamSize(PACMDRVSTREAMINSTANCE adsi, PACMDRVSTREAMSIZE adss)
 457 {
 458     switch (adss->fdwSize)
 459     {
 460     case ACM_STREAMSIZEF_DESTINATION:
 461         /* cbDstLength => cbSrcLength */
 462         if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
 463             adsi->pwfxDst->wFormatTag == WAVE_FORMAT_MPEGLAYER3)
 464         {
 465             /* don't take block overhead into account, doesn't matter too much */
 466             adss->cbSrcLength = adss->cbDstLength * 4;
 467         }
 468         else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_MPEGLAYER3 &&
 469                  adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
 470         {
 471             FIXME("misses the block header overhead\n");
 472             adss->cbSrcLength = 256 + adss->cbDstLength / 4;
 473         }
 474         else
 475         {
 476             return MMSYSERR_NOTSUPPORTED;
 477         }
 478         break;
 479     case ACM_STREAMSIZEF_SOURCE:
 480         /* cbSrcLength => cbDstLength */
 481         if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
 482             adsi->pwfxDst->wFormatTag == WAVE_FORMAT_MPEGLAYER3)
 483         {
 484             FIXME("misses the block header overhead\n");
 485             adss->cbDstLength = 256 + adss->cbSrcLength / 4;
 486         }
 487         else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_MPEGLAYER3 &&
 488                  adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
 489         {
 490             /* don't take block overhead into account, doesn't matter too much */
 491             adss->cbDstLength = adss->cbSrcLength * 4;
 492         }
 493         else
 494         {
 495             return MMSYSERR_NOTSUPPORTED;
 496         }
 497         break;
 498     default:
 499         WARN("Unsupported query %08lx\n", adss->fdwSize);
 500         return MMSYSERR_NOTSUPPORTED;
 501     }
 502     return MMSYSERR_NOERROR;
 503 }
 504
 505 /***********************************************************************
 506  *           MPEG3_StreamConvert
 507  *
 508  */
 509 static LRESULT MPEG3_StreamConvert(PACMDRVSTREAMINSTANCE adsi, PACMDRVSTREAMHEADER adsh)
 510 {
 511     AcmMpeg3Data*       aad = (AcmMpeg3Data*)adsi->dwDriver;
 512     DWORD               nsrc = adsh->cbSrcLength;
 513     DWORD               ndst = adsh->cbDstLength;
 514
 515     if (adsh->fdwConvert &
 516         ~(ACM_STREAMCONVERTF_BLOCKALIGN|
 517           ACM_STREAMCONVERTF_END|
 518           ACM_STREAMCONVERTF_START))
 519     {
 520         FIXME("Unsupported fdwConvert (%08lx), ignoring it\n", adsh->fdwConvert);
 521     }
 522     /* ACM_STREAMCONVERTF_BLOCKALIGN
 523      *  currently all conversions are block aligned, so do nothing for this flag
 524      * ACM_STREAMCONVERTF_END
 525      *  no pending data, so do nothing for this flag
 526      */
 527     if ((adsh->fdwConvert & ACM_STREAMCONVERTF_START))
 528     {
 529         MPEG3_Reset(adsi, aad);
 530     }
 531
 532     aad->convert(adsi, adsh->pbSrc, &nsrc, adsh->pbDst, &ndst);
 533     adsh->cbSrcLengthUsed = nsrc;
 534     adsh->cbDstLengthUsed = ndst;
 535
 536     return MMSYSERR_NOERROR;
 537 }
 538
 539 /**************************************************************************
 540  *                      MPEG3_DriverProc                        [exported]
 541  */
 542 LRESULT CALLBACK        MPEG3_DriverProc(DWORD dwDevID, HDRVR hDriv, UINT wMsg,
 543                                          LPARAM dwParam1, LPARAM dwParam2)
 544 {
 545     TRACE("(%08lx %08lx %04x %08lx %08lx);\n",
 546           dwDevID, (DWORD)hDriv, wMsg, dwParam1, dwParam2);
 547
 548     switch (wMsg)
 549     {
 550     case DRV_LOAD:              return 1;
 551     case DRV_FREE:              return 1;
 552     case DRV_OPEN:              return MPEG3_drvOpen((LPSTR)dwParam1);
 553     case DRV_CLOSE:             return MPEG3_drvClose(dwDevID);
 554     case DRV_ENABLE:            return 1;
 555     case DRV_DISABLE:           return 1;
 556     case DRV_QUERYCONFIGURE:    return 1;
 557     case DRV_CONFIGURE:         MessageBoxA(0, "MPEG3 filter !", "Wine Driver", MB_OK); return 1;
 558     case DRV_INSTALL:           return DRVCNF_RESTART;
 559     case DRV_REMOVE:            return DRVCNF_RESTART;
 560
 561     case ACMDM_DRIVER_NOTIFY:
 562         /* no caching from other ACM drivers is done so far */
 563         return MMSYSERR_NOERROR;
 564
 565     case ACMDM_DRIVER_DETAILS:
 566         return MPEG3_DriverDetails((PACMDRIVERDETAILSW)dwParam1);
 567
 568     case ACMDM_FORMATTAG_DETAILS:
 569         return MPEG3_FormatTagDetails((PACMFORMATTAGDETAILSW)dwParam1, dwParam2);
 570
 571     case ACMDM_FORMAT_DETAILS:
 572         return MPEG3_FormatDetails((PACMFORMATDETAILSW)dwParam1, dwParam2);
 573
 574     case ACMDM_FORMAT_SUGGEST:
 575         return MPEG3_FormatSuggest((PACMDRVFORMATSUGGEST)dwParam1);
 576
 577     case ACMDM_STREAM_OPEN:
 578         return MPEG3_StreamOpen((PACMDRVSTREAMINSTANCE)dwParam1);
 579
 580     case ACMDM_STREAM_CLOSE:
 581         return MPEG3_StreamClose((PACMDRVSTREAMINSTANCE)dwParam1);
 582
 583     case ACMDM_STREAM_SIZE:
 584         return MPEG3_StreamSize((PACMDRVSTREAMINSTANCE)dwParam1, (PACMDRVSTREAMSIZE)dwParam2);
 585
 586     case ACMDM_STREAM_CONVERT:
 587         return MPEG3_StreamConvert((PACMDRVSTREAMINSTANCE)dwParam1, (PACMDRVSTREAMHEADER)dwParam2);
 588
 589     case ACMDM_HARDWARE_WAVE_CAPS_INPUT:
 590     case ACMDM_HARDWARE_WAVE_CAPS_OUTPUT:
 591         /* this converter is not a hardware driver */
 592     case ACMDM_FILTERTAG_DETAILS:
 593     case ACMDM_FILTER_DETAILS:
 594         /* this converter is not a filter */
 595     case ACMDM_STREAM_RESET:
 596         /* only needed for asynchronous driver... we aren't, so just say it */
 597         return MMSYSERR_NOTSUPPORTED;
 598     case ACMDM_STREAM_PREPARE:
 599     case ACMDM_STREAM_UNPREPARE:
 600         /* nothing special to do here... so don't do anything */
 601         return MMSYSERR_NOERROR;
 602
 603     default:
 604         return DefDriverProc(dwDevID, hDriv, wMsg, dwParam1, dwParam2);
 605     }
 606     return 0;
 607 }