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