git.oblomov.eu Git - wine/blob - 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     /* Skip leading ID v3 header */
 149     if (amd->mp.fsizeold == -1 && !strncmp("ID3", (char*)src, 3))
 150     {
 151         UINT length = 10;
 152         const char *header = (char *)src;
 153
 154         TRACE("Found ID3 v2.%d.%d\n", header[3], header[4]);
 155         length += (header[6] & 0x7F) << 21;
 156         length += (header[7] & 0x7F) << 14;
 157         length += (header[8] & 0x7F) << 7;
 158         length += (header[9] & 0x7F);
 159         TRACE("Length: %u\n", length);
 160         *nsrc = length;
 161         *ndst = 0;
 162         return;
 163     }
 164
 165     buffered_before = get_num_buffered_bytes(&amd->mp);
 166     ret = decodeMP3(&amd->mp, src, *nsrc, dst, *ndst, &size);
 167     buffered_during = get_num_buffered_bytes(&amd->mp);
 168     if (ret != MP3_OK)
 169     {
 170         if (ret == MP3_ERR)
 171             FIXME("Error occured during decoding!\n");
 172         *ndst = *nsrc = 0;
 173         return;
 174     }
 175     do {
 176         dpos += size;
 177         if (*ndst - dpos < 4608) break;
 178         ret = decodeMP3(&amd->mp, NULL, 0,
 179                         dst + dpos, *ndst - dpos, &size);
 180     } while (ret == MP3_OK);
 181     *ndst = dpos;
 182
 183     buffered_after = get_num_buffered_bytes(&amd->mp);
 184     TRACE("before %d put %d during %d after %d\n", buffered_before, *nsrc, buffered_during, buffered_after);
 185
 186     *nsrc -= buffered_after;
 187     ClearMP3Buffer(&amd->mp);
 188 }
 189
 190 /***********************************************************************
 191  *           MPEG3_DriverDetails
 192  *
 193  */
 194 static  LRESULT MPEG3_DriverDetails(PACMDRIVERDETAILSW add)
 195 {
 196     add->fccType = ACMDRIVERDETAILS_FCCTYPE_AUDIOCODEC;
 197     add->fccComp = ACMDRIVERDETAILS_FCCCOMP_UNDEFINED;
 198     add->wMid = 0xFF;
 199     add->wPid = 0x00;
 200     add->vdwACM = 0x01000000;
 201     add->vdwDriver = 0x01000000;
 202     add->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CODEC;
 203     add->cFormatTags = 2; /* PCM, MPEG3 */
 204     add->cFilterTags = 0;
 205     add->hicon = NULL;
 206     MultiByteToWideChar( CP_ACP, 0, "WINE-MPEG3", -1,
 207                          add->szShortName, sizeof(add->szShortName)/sizeof(WCHAR) );
 208     MultiByteToWideChar( CP_ACP, 0, "Wine MPEG3 decoder", -1,
 209                          add->szLongName, sizeof(add->szLongName)/sizeof(WCHAR) );
 210     MultiByteToWideChar( CP_ACP, 0, "Brought to you by the Wine team (based on mpglib by Michael Hipp)...", -1,
 211                          add->szCopyright, sizeof(add->szCopyright)/sizeof(WCHAR) );
 212     MultiByteToWideChar( CP_ACP, 0, "Refer to LICENSE file", -1,
 213                          add->szLicensing, sizeof(add->szLicensing)/sizeof(WCHAR) );
 214     add->szFeatures[0] = 0;
 215
 216     return MMSYSERR_NOERROR;
 217 }
 218
 219 /***********************************************************************
 220  *           MPEG3_FormatTagDetails
 221  *
 222  */
 223 static  LRESULT MPEG3_FormatTagDetails(PACMFORMATTAGDETAILSW aftd, DWORD dwQuery)
 224 {
 225     static const WCHAR szPcm[]={'P','C','M',0};
 226     static const WCHAR szMpeg3[]={'M','P','e','g','3',0};
 227
 228     switch (dwQuery)
 229     {
 230     case ACM_FORMATTAGDETAILSF_INDEX:
 231         if (aftd->dwFormatTagIndex >= 2) return ACMERR_NOTPOSSIBLE;
 232         break;
 233     case ACM_FORMATTAGDETAILSF_LARGESTSIZE:
 234         if (aftd->dwFormatTag == WAVE_FORMAT_UNKNOWN)
 235         {
 236             aftd->dwFormatTagIndex = 1; /* WAVE_FORMAT_MPEGLAYER3 is bigger than PCM */
 237             break;
 238         }
 239         /* fall thru */
 240     case ACM_FORMATTAGDETAILSF_FORMATTAG:
 241         switch (aftd->dwFormatTag)
 242         {
 243         case WAVE_FORMAT_PCM:           aftd->dwFormatTagIndex = 0; break;
 244         case WAVE_FORMAT_MPEGLAYER3:    aftd->dwFormatTagIndex = 1; break;
 245         default:                        return ACMERR_NOTPOSSIBLE;
 246         }
 247         break;
 248     default:
 249         WARN("Unsupported query %08x\n", dwQuery);
 250         return MMSYSERR_NOTSUPPORTED;
 251     }
 252
 253     aftd->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CODEC;
 254     switch (aftd->dwFormatTagIndex)
 255     {
 256     case 0:
 257         aftd->dwFormatTag = WAVE_FORMAT_PCM;
 258         aftd->cbFormatSize = sizeof(PCMWAVEFORMAT);
 259         aftd->cStandardFormats = NUM_PCM_FORMATS;
 260         lstrcpyW(aftd->szFormatTag, szPcm);
 261         break;
 262     case 1:
 263         aftd->dwFormatTag = WAVE_FORMAT_MPEGLAYER3;
 264         aftd->cbFormatSize = sizeof(MPEGLAYER3WAVEFORMAT);
 265         aftd->cStandardFormats = NUM_MPEG3_FORMATS;
 266         lstrcpyW(aftd->szFormatTag, szMpeg3);
 267         break;
 268     }
 269     return MMSYSERR_NOERROR;
 270 }
 271
 272 static void fill_in_wfx(unsigned cbwfx, WAVEFORMATEX* wfx, unsigned bit_rate)
 273 {
 274     MPEGLAYER3WAVEFORMAT*   mp3wfx = (MPEGLAYER3WAVEFORMAT*)wfx;
 275
 276     wfx->nAvgBytesPerSec = bit_rate / 8;
 277     if (cbwfx >= sizeof(WAVEFORMATEX))
 278         wfx->cbSize = sizeof(MPEGLAYER3WAVEFORMAT) - sizeof(WAVEFORMATEX);
 279     if (cbwfx >= sizeof(MPEGLAYER3WAVEFORMAT))
 280     {
 281         mp3wfx->wID = MPEGLAYER3_ID_MPEG;
 282         mp3wfx->fdwFlags = MPEGLAYER3_FLAG_PADDING_OFF;
 283         mp3wfx->nBlockSize = (bit_rate * 144) / wfx->nSamplesPerSec;
 284         mp3wfx->nFramesPerBlock = 1;
 285         mp3wfx->nCodecDelay = 0x0571;
 286     }
 287 }
 288
 289 /***********************************************************************
 290  *           MPEG3_FormatDetails
 291  *
 292  */
 293 static  LRESULT MPEG3_FormatDetails(PACMFORMATDETAILSW afd, DWORD dwQuery)
 294 {
 295     switch (dwQuery)
 296     {
 297     case ACM_FORMATDETAILSF_FORMAT:
 298         if (MPEG3_GetFormatIndex(afd->pwfx) == 0xFFFFFFFF) return ACMERR_NOTPOSSIBLE;
 299         break;
 300     case ACM_FORMATDETAILSF_INDEX:
 301         afd->pwfx->wFormatTag = afd->dwFormatTag;
 302         switch (afd->dwFormatTag)
 303         {
 304         case WAVE_FORMAT_PCM:
 305             if (afd->dwFormatIndex >= NUM_PCM_FORMATS) return ACMERR_NOTPOSSIBLE;
 306             afd->pwfx->nChannels = PCM_Formats[afd->dwFormatIndex].nChannels;
 307             afd->pwfx->nSamplesPerSec = PCM_Formats[afd->dwFormatIndex].rate;
 308             afd->pwfx->wBitsPerSample = PCM_Formats[afd->dwFormatIndex].nBits;
 309             /* native MSACM uses a PCMWAVEFORMAT structure, so cbSize is not accessible
 310              * afd->pwfx->cbSize = 0;
 311              */
 312             afd->pwfx->nBlockAlign =
 313                 (afd->pwfx->nChannels * afd->pwfx->wBitsPerSample) / 8;
 314             afd->pwfx->nAvgBytesPerSec =
 315                 afd->pwfx->nSamplesPerSec * afd->pwfx->nBlockAlign;
 316             break;
 317         case WAVE_FORMAT_MPEGLAYER3:
 318             if (afd->dwFormatIndex >= NUM_MPEG3_FORMATS) return ACMERR_NOTPOSSIBLE;
 319             afd->pwfx->nChannels = MPEG3_Formats[afd->dwFormatIndex].nChannels;
 320             afd->pwfx->nSamplesPerSec = MPEG3_Formats[afd->dwFormatIndex].rate;
 321             afd->pwfx->wBitsPerSample = MPEG3_Formats[afd->dwFormatIndex].nBits;
 322             afd->pwfx->nBlockAlign = 1;
 323             fill_in_wfx(afd->cbwfx, afd->pwfx, 192000);
 324             break;
 325         default:
 326             WARN("Unsupported tag %08x\n", afd->dwFormatTag);
 327             return MMSYSERR_INVALPARAM;
 328         }
 329         break;
 330     default:
 331         WARN("Unsupported query %08x\n", dwQuery);
 332         return MMSYSERR_NOTSUPPORTED;
 333     }
 334     afd->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CODEC;
 335     afd->szFormat[0] = 0; /* let MSACM format this for us... */
 336
 337     return MMSYSERR_NOERROR;
 338 }
 339
 340 /***********************************************************************
 341  *           MPEG3_FormatSuggest
 342  *
 343  */
 344 static  LRESULT MPEG3_FormatSuggest(PACMDRVFORMATSUGGEST adfs)
 345 {
 346     /* some tests ... */
 347     if (adfs->cbwfxSrc < sizeof(PCMWAVEFORMAT) ||
 348         adfs->cbwfxDst < sizeof(PCMWAVEFORMAT) ||
 349         MPEG3_GetFormatIndex(adfs->pwfxSrc) == 0xFFFFFFFF) return ACMERR_NOTPOSSIBLE;
 350     /* FIXME: should do those tests against the real size (according to format tag */
 351
 352     /* If no suggestion for destination, then copy source value */
 353     if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_NCHANNELS))
 354         adfs->pwfxDst->nChannels = adfs->pwfxSrc->nChannels;
 355     if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_NSAMPLESPERSEC))
 356         adfs->pwfxDst->nSamplesPerSec = adfs->pwfxSrc->nSamplesPerSec;
 357
 358     if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_WBITSPERSAMPLE))
 359     {
 360         if (adfs->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM)
 361             adfs->pwfxDst->wBitsPerSample = 4;
 362         else
 363             adfs->pwfxDst->wBitsPerSample = 16;
 364     }
 365     if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_WFORMATTAG))
 366     {
 367         if (adfs->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM)
 368             adfs->pwfxDst->wFormatTag = WAVE_FORMAT_MPEGLAYER3;
 369         else
 370             adfs->pwfxDst->wFormatTag = WAVE_FORMAT_PCM;
 371     }
 372
 373     /* check if result is ok */
 374     if (MPEG3_GetFormatIndex(adfs->pwfxDst) == 0xFFFFFFFF) return ACMERR_NOTPOSSIBLE;
 375
 376     /* recompute other values */
 377     switch (adfs->pwfxDst->wFormatTag)
 378     {
 379     case WAVE_FORMAT_PCM:
 380         adfs->pwfxDst->nBlockAlign = (adfs->pwfxDst->nChannels * adfs->pwfxDst->wBitsPerSample) / 8;
 381         adfs->pwfxDst->nAvgBytesPerSec = adfs->pwfxDst->nSamplesPerSec * adfs->pwfxDst->nBlockAlign;
 382         break;
 383     case WAVE_FORMAT_MPEGLAYER3:
 384         adfs->pwfxDst->nBlockAlign = 1;
 385         fill_in_wfx(adfs->cbwfxDst, adfs->pwfxDst, 192000);
 386         break;
 387     default:
 388         FIXME("\n");
 389         break;
 390     }
 391
 392     return MMSYSERR_NOERROR;
 393 }
 394
 395 /***********************************************************************
 396  *           MPEG3_Reset
 397  *
 398  */
 399 static void MPEG3_Reset(PACMDRVSTREAMINSTANCE adsi, AcmMpeg3Data* aad)
 400 {
 401     ClearMP3Buffer(&aad->mp);
 402     InitMP3(&aad->mp);
 403 }
 404
 405 /***********************************************************************
 406  *           MPEG3_StreamOpen
 407  *
 408  */
 409 static  LRESULT MPEG3_StreamOpen(PACMDRVSTREAMINSTANCE adsi)
 410 {
 411     AcmMpeg3Data*       aad;
 412
 413     assert(!(adsi->fdwOpen & ACM_STREAMOPENF_ASYNC));
 414
 415     if (MPEG3_GetFormatIndex(adsi->pwfxSrc) == 0xFFFFFFFF ||
 416         MPEG3_GetFormatIndex(adsi->pwfxDst) == 0xFFFFFFFF)
 417         return ACMERR_NOTPOSSIBLE;
 418
 419     aad = HeapAlloc(GetProcessHeap(), 0, sizeof(AcmMpeg3Data));
 420     if (aad == 0) return MMSYSERR_NOMEM;
 421
 422     adsi->dwDriver = (DWORD)aad;
 423
 424     if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
 425         adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
 426     {
 427         goto theEnd;
 428     }
 429     else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_MPEGLAYER3 &&
 430              adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
 431     {
 432         /* resampling or mono <=> stereo not available
 433          * MPEG3 algo only define 16 bit per sample output
 434          */
 435         if (adsi->pwfxSrc->nSamplesPerSec != adsi->pwfxDst->nSamplesPerSec ||
 436             adsi->pwfxSrc->nChannels != adsi->pwfxDst->nChannels ||
 437             adsi->pwfxDst->wBitsPerSample != 16)
 438             goto theEnd;
 439         aad->convert = mp3_horse;
 440         InitMP3(&aad->mp);
 441     }
 442     /* no encoding yet
 443     else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
 444              adsi->pwfxDst->wFormatTag == WAVE_FORMAT_MPEGLAYER3)
 445     */
 446     else goto theEnd;
 447     MPEG3_Reset(adsi, aad);
 448
 449     return MMSYSERR_NOERROR;
 450
 451  theEnd:
 452     HeapFree(GetProcessHeap(), 0, aad);
 453     adsi->dwDriver = 0L;
 454     return MMSYSERR_NOTSUPPORTED;
 455 }
 456
 457 /***********************************************************************
 458  *           MPEG3_StreamClose
 459  *
 460  */
 461 static  LRESULT MPEG3_StreamClose(PACMDRVSTREAMINSTANCE adsi)
 462 {
 463     ClearMP3Buffer(&((AcmMpeg3Data*)adsi->dwDriver)->mp);
 464     HeapFree(GetProcessHeap(), 0, (void*)adsi->dwDriver);
 465     return MMSYSERR_NOERROR;
 466 }
 467
 468 /***********************************************************************
 469  *           MPEG3_StreamSize
 470  *
 471  */
 472 static  LRESULT MPEG3_StreamSize(PACMDRVSTREAMINSTANCE adsi, PACMDRVSTREAMSIZE adss)
 473 {
 474     switch (adss->fdwSize)
 475     {
 476     case ACM_STREAMSIZEF_DESTINATION:
 477         /* cbDstLength => cbSrcLength */
 478         if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
 479             adsi->pwfxDst->wFormatTag == WAVE_FORMAT_MPEGLAYER3)
 480         {
 481             /* don't take block overhead into account, doesn't matter too much */
 482             adss->cbSrcLength = adss->cbDstLength * 12;
 483         }
 484         else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_MPEGLAYER3 &&
 485                  adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
 486         {
 487             FIXME("misses the block header overhead\n");
 488             adss->cbSrcLength = 256 + adss->cbDstLength / 12;
 489         }
 490         else
 491         {
 492             return MMSYSERR_NOTSUPPORTED;
 493         }
 494         break;
 495     case ACM_STREAMSIZEF_SOURCE:
 496         /* cbSrcLength => cbDstLength */
 497         if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
 498             adsi->pwfxDst->wFormatTag == WAVE_FORMAT_MPEGLAYER3)
 499         {
 500             FIXME("misses the block header overhead\n");
 501             adss->cbDstLength = 256 + adss->cbSrcLength / 12;
 502         }
 503         else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_MPEGLAYER3 &&
 504                  adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
 505         {
 506             /* don't take block overhead into account, doesn't matter too much */
 507             adss->cbDstLength = adss->cbSrcLength * 12;
 508         }
 509         else
 510         {
 511             return MMSYSERR_NOTSUPPORTED;
 512         }
 513         break;
 514     default:
 515         WARN("Unsupported query %08x\n", adss->fdwSize);
 516         return MMSYSERR_NOTSUPPORTED;
 517     }
 518     return MMSYSERR_NOERROR;
 519 }
 520
 521 /***********************************************************************
 522  *           MPEG3_StreamConvert
 523  *
 524  */
 525 static LRESULT MPEG3_StreamConvert(PACMDRVSTREAMINSTANCE adsi, PACMDRVSTREAMHEADER adsh)
 526 {
 527     AcmMpeg3Data*       aad = (AcmMpeg3Data*)adsi->dwDriver;
 528     DWORD               nsrc = adsh->cbSrcLength;
 529     DWORD               ndst = adsh->cbDstLength;
 530
 531     if (adsh->fdwConvert &
 532         ~(ACM_STREAMCONVERTF_BLOCKALIGN|
 533           ACM_STREAMCONVERTF_END|
 534           ACM_STREAMCONVERTF_START))
 535     {
 536         FIXME("Unsupported fdwConvert (%08x), ignoring it\n", adsh->fdwConvert);
 537     }
 538     /* ACM_STREAMCONVERTF_BLOCKALIGN
 539      *  currently all conversions are block aligned, so do nothing for this flag
 540      * ACM_STREAMCONVERTF_END
 541      *  no pending data, so do nothing for this flag
 542      */
 543     if ((adsh->fdwConvert & ACM_STREAMCONVERTF_START))
 544     {
 545         MPEG3_Reset(adsi, aad);
 546     }
 547
 548     aad->convert(adsi, adsh->pbSrc, &nsrc, adsh->pbDst, &ndst);
 549     adsh->cbSrcLengthUsed = nsrc;
 550     adsh->cbDstLengthUsed = ndst;
 551
 552     return MMSYSERR_NOERROR;
 553 }
 554
 555 /**************************************************************************
 556  *                      MPEG3_DriverProc                        [exported]
 557  */
 558 LRESULT CALLBACK MPEG3_DriverProc(DWORD_PTR dwDevID, HDRVR hDriv, UINT wMsg,
 559                                          LPARAM dwParam1, LPARAM dwParam2)
 560 {
 561     TRACE("(%08lx %p %04x %08lx %08lx);\n",
 562           dwDevID, hDriv, wMsg, dwParam1, dwParam2);
 563
 564     switch (wMsg)
 565     {
 566     case DRV_LOAD:              return 1;
 567     case DRV_FREE:              return 1;
 568     case DRV_OPEN:              return MPEG3_drvOpen((LPSTR)dwParam1);
 569     case DRV_CLOSE:             return MPEG3_drvClose(dwDevID);
 570     case DRV_ENABLE:            return 1;
 571     case DRV_DISABLE:           return 1;
 572     case DRV_QUERYCONFIGURE:    return 1;
 573     case DRV_CONFIGURE:         MessageBoxA(0, "MPEG3 filter !", "Wine Driver", MB_OK); return 1;
 574     case DRV_INSTALL:           return DRVCNF_RESTART;
 575     case DRV_REMOVE:            return DRVCNF_RESTART;
 576
 577     case ACMDM_DRIVER_NOTIFY:
 578         /* no caching from other ACM drivers is done so far */
 579         return MMSYSERR_NOERROR;
 580
 581     case ACMDM_DRIVER_DETAILS:
 582         return MPEG3_DriverDetails((PACMDRIVERDETAILSW)dwParam1);
 583
 584     case ACMDM_FORMATTAG_DETAILS:
 585         return MPEG3_FormatTagDetails((PACMFORMATTAGDETAILSW)dwParam1, dwParam2);
 586
 587     case ACMDM_FORMAT_DETAILS:
 588         return MPEG3_FormatDetails((PACMFORMATDETAILSW)dwParam1, dwParam2);
 589
 590     case ACMDM_FORMAT_SUGGEST:
 591         return MPEG3_FormatSuggest((PACMDRVFORMATSUGGEST)dwParam1);
 592
 593     case ACMDM_STREAM_OPEN:
 594         return MPEG3_StreamOpen((PACMDRVSTREAMINSTANCE)dwParam1);
 595
 596     case ACMDM_STREAM_CLOSE:
 597         return MPEG3_StreamClose((PACMDRVSTREAMINSTANCE)dwParam1);
 598
 599     case ACMDM_STREAM_SIZE:
 600         return MPEG3_StreamSize((PACMDRVSTREAMINSTANCE)dwParam1, (PACMDRVSTREAMSIZE)dwParam2);
 601
 602     case ACMDM_STREAM_CONVERT:
 603         return MPEG3_StreamConvert((PACMDRVSTREAMINSTANCE)dwParam1, (PACMDRVSTREAMHEADER)dwParam2);
 604
 605     case ACMDM_HARDWARE_WAVE_CAPS_INPUT:
 606     case ACMDM_HARDWARE_WAVE_CAPS_OUTPUT:
 607         /* this converter is not a hardware driver */
 608     case ACMDM_FILTERTAG_DETAILS:
 609     case ACMDM_FILTER_DETAILS:
 610         /* this converter is not a filter */
 611     case ACMDM_STREAM_RESET:
 612         /* only needed for asynchronous driver... we aren't, so just say it */
 613         return MMSYSERR_NOTSUPPORTED;
 614     case ACMDM_STREAM_PREPARE:
 615     case ACMDM_STREAM_UNPREPARE:
 616         /* nothing special to do here... so don't do anything */
 617         return MMSYSERR_NOERROR;
 618
 619     default:
 620         return DefDriverProc(dwDevID, hDriv, wMsg, dwParam1, dwParam2);
 621     }
 622 }