dlls/winemp3.acm/mpegl3.c

   1 /*
   2  * MPEG Layer 3 handling
   3  *
   4  *      Copyright (C) 2002              Eric Pouech
   5  *      Copyright (C) 2009              CodeWeavers, Aric Stewart
   6  *
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  21  */
  22
  23 #include "config.h"
  24 #include "wine/port.h"
  25
  26 #include <assert.h>
  27 #include <stdarg.h>
  28 #include <string.h>
  29 #include "windef.h"
  30 #include "winbase.h"
  31 #include "wingdi.h"
  32 #include "winuser.h"
  33 #include "winnls.h"
  34 #include "mmsystem.h"
  35 #include "mmreg.h"
  36 #include "msacm.h"
  37 #include "msacmdrv.h"
  38
  39 #ifdef HAVE_MPG123_H
  40 #include <mpg123.h>
  41 #endif
  42
  43 #include "wine/debug.h"
  44
  45 WINE_DEFAULT_DEBUG_CHANNEL(mpeg3);
  46
  47 /***********************************************************************
  48  *           MPEG3_drvOpen
  49  */
  50 static LRESULT MPEG3_drvOpen(LPCSTR str)
  51 {
  52     mpg123_init();
  53     return 1;
  54 }
  55
  56 /***********************************************************************
  57  *           MPEG3_drvClose
  58  */
  59 static LRESULT MPEG3_drvClose(DWORD_PTR dwDevID)
  60 {
  61     mpg123_exit();
  62     return 1;
  63 }
  64
  65 typedef struct tagAcmMpeg3Data
  66 {
  67     void (*convert)(PACMDRVSTREAMINSTANCE adsi,
  68                     const unsigned char*, LPDWORD, unsigned char*, LPDWORD);
  69     mpg123_handle *mh;
  70 } AcmMpeg3Data;
  71
  72 /* table to list all supported formats... those are the basic ones. this
  73  * also helps given a unique index to each of the supported formats
  74  */
  75 typedef struct
  76 {
  77     int         nChannels;
  78     int         nBits;
  79     int         rate;
  80 } Format;
  81
  82 static const Format PCM_Formats[] =
  83 {
  84     {1,  8,  8000}, {2,  8,  8000}, {1, 16,  8000}, {2, 16,  8000},
  85     {1,  8, 11025}, {2,  8, 11025}, {1, 16, 11025}, {2, 16, 11025},
  86     {1,  8, 12000}, {2,  8, 12000}, {1, 16, 12000}, {2, 16, 12000},
  87     {1,  8, 16000}, {2,  8, 16000}, {1, 16, 16000}, {2, 16, 16000},
  88     {1,  8, 22050}, {2,  8, 22050}, {1, 16, 22050}, {2, 16, 22050},
  89     {1,  8, 24000}, {2,  8, 24000}, {1, 16, 24000}, {2, 16, 24000},
  90     {1,  8, 32000}, {2,  8, 32000}, {1, 16, 32000}, {2, 16, 32000},
  91     {1,  8, 44100}, {2,  8, 44100}, {1, 16, 44100}, {2, 16, 44100},
  92     {1,  8, 48000}, {2,  8, 48000}, {1, 16, 48000}, {2, 16, 48000}
  93 };
  94
  95 static const Format MPEG3_Formats[] =
  96 {
  97     {1,  0,  8000}, {2,  0,  8000},
  98     {1,  0, 11025}, {2,  0, 11025},
  99     {1,  0, 12000}, {2,  0, 12000},
 100     {1,  0, 16000}, {2,  0, 16000},
 101     {1,  0, 22050}, {2,  0, 22050},
 102     {1,  0, 24000}, {2,  0, 24000},
 103     {1,  0, 32000}, {2,  0, 32000},
 104     {1,  0, 44100}, {2,  0, 44100},
 105     {1,  0, 48000}, {2,  0, 48000}
 106 };
 107
 108 #define NUM_PCM_FORMATS         (sizeof(PCM_Formats) / sizeof(PCM_Formats[0]))
 109 #define NUM_MPEG3_FORMATS       (sizeof(MPEG3_Formats) / sizeof(MPEG3_Formats[0]))
 110
 111 /***********************************************************************
 112  *           MPEG3_GetFormatIndex
 113  */
 114 static  DWORD   MPEG3_GetFormatIndex(LPWAVEFORMATEX wfx)
 115 {
 116     int         i, hi;
 117     const Format *fmts;
 118
 119     switch (wfx->wFormatTag)
 120     {
 121     case WAVE_FORMAT_PCM:
 122         hi = NUM_PCM_FORMATS;
 123         fmts = PCM_Formats;
 124         break;
 125     case WAVE_FORMAT_MPEGLAYER3:
 126         hi = NUM_MPEG3_FORMATS;
 127         fmts = MPEG3_Formats;
 128         break;
 129     default:
 130         return 0xFFFFFFFF;
 131     }
 132
 133     for (i = 0; i < hi; i++)
 134     {
 135         if (wfx->nChannels == fmts[i].nChannels &&
 136             wfx->nSamplesPerSec == fmts[i].rate &&
 137             (wfx->wBitsPerSample == fmts[i].nBits || !fmts[i].nBits))
 138             return i;
 139     }
 140
 141     return 0xFFFFFFFF;
 142 }
 143
 144 static void mp3_horse(PACMDRVSTREAMINSTANCE adsi,
 145                       const unsigned char* src, LPDWORD nsrc,
 146                       unsigned char* dst, LPDWORD ndst)
 147 {
 148     AcmMpeg3Data*       amd = (AcmMpeg3Data*)adsi->dwDriver;
 149     int                 ret;
 150     size_t              size;
 151     DWORD               dpos = 0;
 152
 153
 154     if (*nsrc > 0)
 155     {
 156         ret = mpg123_feed(amd->mh, src, *nsrc);
 157         if (ret != MPG123_OK)
 158         {
 159             ERR("Error feeding data\n");
 160             *ndst = *nsrc = 0;
 161             return;
 162         }
 163     }
 164
 165     do {
 166         size = 0;
 167         ret = mpg123_read(amd->mh, dst + dpos, *ndst - dpos, &size);
 168         if (ret == MPG123_ERR)
 169         {
 170             FIXME("Error occurred during decoding!\n");
 171             *ndst = *nsrc = 0;
 172             return;
 173         }
 174
 175         if (ret == MPG123_NEW_FORMAT)
 176         {
 177             long rate;
 178             int channels, enc;
 179             mpg123_getformat(amd->mh, &rate, &channels, &enc);
 180             TRACE("New format: %li Hz, %i channels, encoding value %i\n", rate, channels, enc);
 181         }
 182         dpos += size;
 183         if (dpos > *ndst) break;
 184     } while (ret != MPG123_ERR && ret != MPG123_NEED_MORE);
 185     *ndst = dpos;
 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...", -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     mpg123_feedseek(aad->mh, 0, SEEK_SET, NULL);
 400     mpg123_close(aad->mh);
 401     mpg123_open_feed(aad->mh);
 402 }
 403
 404 /***********************************************************************
 405  *           MPEG3_StreamOpen
 406  *
 407  */
 408 static  LRESULT MPEG3_StreamOpen(PACMDRVSTREAMINSTANCE adsi)
 409 {
 410     AcmMpeg3Data*       aad;
 411     int err;
 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_PTR)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         aad->mh = mpg123_new(NULL,&err);
 441         mpg123_open_feed(aad->mh);
 442     }
 443     /* no encoding yet
 444     else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
 445              adsi->pwfxDst->wFormatTag == WAVE_FORMAT_MPEGLAYER3)
 446     */
 447     else goto theEnd;
 448     MPEG3_Reset(adsi, aad);
 449
 450     return MMSYSERR_NOERROR;
 451
 452  theEnd:
 453     HeapFree(GetProcessHeap(), 0, aad);
 454     adsi->dwDriver = 0L;
 455     return MMSYSERR_NOTSUPPORTED;
 456 }
 457
 458 /***********************************************************************
 459  *           MPEG3_StreamClose
 460  *
 461  */
 462 static  LRESULT MPEG3_StreamClose(PACMDRVSTREAMINSTANCE adsi)
 463 {
 464     mpg123_close(((AcmMpeg3Data*)adsi->dwDriver)->mh);
 465     mpg123_delete(((AcmMpeg3Data*)adsi->dwDriver)->mh);
 466     HeapFree(GetProcessHeap(), 0, (void*)adsi->dwDriver);
 467     return MMSYSERR_NOERROR;
 468 }
 469
 470 /***********************************************************************
 471  *           MPEG3_StreamSize
 472  *
 473  */
 474 static  LRESULT MPEG3_StreamSize(PACMDRVSTREAMINSTANCE adsi, PACMDRVSTREAMSIZE adss)
 475 {
 476     DWORD nblocks;
 477
 478     switch (adss->fdwSize)
 479     {
 480     case ACM_STREAMSIZEF_DESTINATION:
 481         /* cbDstLength => cbSrcLength */
 482         if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
 483             adsi->pwfxDst->wFormatTag == WAVE_FORMAT_MPEGLAYER3)
 484         {
 485             nblocks = (adss->cbDstLength - 3000) / (DWORD)(adsi->pwfxDst->nAvgBytesPerSec * 1152 / adsi->pwfxDst->nSamplesPerSec + 0.5);
 486             if (nblocks == 0)
 487                 return ACMERR_NOTPOSSIBLE;
 488             adss->cbSrcLength = nblocks * 1152 * adsi->pwfxSrc->nBlockAlign;
 489         }
 490         else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_MPEGLAYER3 &&
 491                  adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
 492         {
 493             nblocks = adss->cbDstLength / (adsi->pwfxDst->nBlockAlign * 1152);
 494             if (nblocks == 0)
 495                 return ACMERR_NOTPOSSIBLE;
 496             adss->cbSrcLength = nblocks * (DWORD)(adsi->pwfxSrc->nAvgBytesPerSec * 1152 / adsi->pwfxSrc->nSamplesPerSec);
 497         }
 498         else
 499         {
 500             return MMSYSERR_NOTSUPPORTED;
 501         }
 502         break;
 503     case ACM_STREAMSIZEF_SOURCE:
 504         /* cbSrcLength => cbDstLength */
 505         if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
 506             adsi->pwfxDst->wFormatTag == WAVE_FORMAT_MPEGLAYER3)
 507         {
 508             nblocks = adss->cbSrcLength / (adsi->pwfxSrc->nBlockAlign * 1152);
 509             if (nblocks == 0)
 510                 return ACMERR_NOTPOSSIBLE;
 511             if (adss->cbSrcLength % (DWORD)(adsi->pwfxSrc->nBlockAlign * 1152))
 512                 /* Round block count up. */
 513                 nblocks++;
 514             adss->cbDstLength = 3000 + nblocks * (DWORD)(adsi->pwfxDst->nAvgBytesPerSec * 1152 / adsi->pwfxDst->nSamplesPerSec + 0.5);
 515         }
 516         else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_MPEGLAYER3 &&
 517                  adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
 518         {
 519             nblocks = adss->cbSrcLength / (DWORD)(adsi->pwfxSrc->nAvgBytesPerSec * 1152 / adsi->pwfxSrc->nSamplesPerSec);
 520             if (nblocks == 0)
 521                 return ACMERR_NOTPOSSIBLE;
 522             if (adss->cbSrcLength % (DWORD)(adsi->pwfxSrc->nAvgBytesPerSec * 1152 / adsi->pwfxSrc->nSamplesPerSec))
 523                 /* Round block count up. */
 524                 nblocks++;
 525             adss->cbDstLength = nblocks * 1152 * adsi->pwfxDst->nBlockAlign;
 526         }
 527         else
 528         {
 529             return MMSYSERR_NOTSUPPORTED;
 530         }
 531         break;
 532     default:
 533         WARN("Unsupported query %08x\n", adss->fdwSize);
 534         return MMSYSERR_NOTSUPPORTED;
 535     }
 536     return MMSYSERR_NOERROR;
 537 }
 538
 539 /***********************************************************************
 540  *           MPEG3_StreamConvert
 541  *
 542  */
 543 static LRESULT MPEG3_StreamConvert(PACMDRVSTREAMINSTANCE adsi, PACMDRVSTREAMHEADER adsh)
 544 {
 545     AcmMpeg3Data*       aad = (AcmMpeg3Data*)adsi->dwDriver;
 546     DWORD               nsrc = adsh->cbSrcLength;
 547     DWORD               ndst = adsh->cbDstLength;
 548
 549     if (adsh->fdwConvert &
 550         ~(ACM_STREAMCONVERTF_BLOCKALIGN|
 551           ACM_STREAMCONVERTF_END|
 552           ACM_STREAMCONVERTF_START))
 553     {
 554         FIXME("Unsupported fdwConvert (%08x), ignoring it\n", adsh->fdwConvert);
 555     }
 556     /* ACM_STREAMCONVERTF_BLOCKALIGN
 557      *  currently all conversions are block aligned, so do nothing for this flag
 558      * ACM_STREAMCONVERTF_END
 559      *  no pending data, so do nothing for this flag
 560      */
 561     if ((adsh->fdwConvert & ACM_STREAMCONVERTF_START))
 562     {
 563         MPEG3_Reset(adsi, aad);
 564     }
 565
 566     aad->convert(adsi, adsh->pbSrc, &nsrc, adsh->pbDst, &ndst);
 567     adsh->cbSrcLengthUsed = nsrc;
 568     adsh->cbDstLengthUsed = ndst;
 569
 570     return MMSYSERR_NOERROR;
 571 }
 572
 573 /**************************************************************************
 574  *                      MPEG3_DriverProc                        [exported]
 575  */
 576 LRESULT CALLBACK MPEG3_DriverProc(DWORD_PTR dwDevID, HDRVR hDriv, UINT wMsg,
 577                                          LPARAM dwParam1, LPARAM dwParam2)
 578 {
 579     TRACE("(%08lx %p %04x %08lx %08lx);\n",
 580           dwDevID, hDriv, wMsg, dwParam1, dwParam2);
 581
 582     switch (wMsg)
 583     {
 584     case DRV_LOAD:              return 1;
 585     case DRV_FREE:              return 1;
 586     case DRV_OPEN:              return MPEG3_drvOpen((LPSTR)dwParam1);
 587     case DRV_CLOSE:             return MPEG3_drvClose(dwDevID);
 588     case DRV_ENABLE:            return 1;
 589     case DRV_DISABLE:           return 1;
 590     case DRV_QUERYCONFIGURE:    return 1;
 591     case DRV_CONFIGURE:         MessageBoxA(0, "MPEG3 filter !", "Wine Driver", MB_OK); return 1;
 592     case DRV_INSTALL:           return DRVCNF_RESTART;
 593     case DRV_REMOVE:            return DRVCNF_RESTART;
 594
 595     case ACMDM_DRIVER_NOTIFY:
 596         /* no caching from other ACM drivers is done so far */
 597         return MMSYSERR_NOERROR;
 598
 599     case ACMDM_DRIVER_DETAILS:
 600         return MPEG3_DriverDetails((PACMDRIVERDETAILSW)dwParam1);
 601
 602     case ACMDM_FORMATTAG_DETAILS:
 603         return MPEG3_FormatTagDetails((PACMFORMATTAGDETAILSW)dwParam1, dwParam2);
 604
 605     case ACMDM_FORMAT_DETAILS:
 606         return MPEG3_FormatDetails((PACMFORMATDETAILSW)dwParam1, dwParam2);
 607
 608     case ACMDM_FORMAT_SUGGEST:
 609         return MPEG3_FormatSuggest((PACMDRVFORMATSUGGEST)dwParam1);
 610
 611     case ACMDM_STREAM_OPEN:
 612         return MPEG3_StreamOpen((PACMDRVSTREAMINSTANCE)dwParam1);
 613
 614     case ACMDM_STREAM_CLOSE:
 615         return MPEG3_StreamClose((PACMDRVSTREAMINSTANCE)dwParam1);
 616
 617     case ACMDM_STREAM_SIZE:
 618         return MPEG3_StreamSize((PACMDRVSTREAMINSTANCE)dwParam1, (PACMDRVSTREAMSIZE)dwParam2);
 619
 620     case ACMDM_STREAM_CONVERT:
 621         return MPEG3_StreamConvert((PACMDRVSTREAMINSTANCE)dwParam1, (PACMDRVSTREAMHEADER)dwParam2);
 622
 623     case ACMDM_HARDWARE_WAVE_CAPS_INPUT:
 624     case ACMDM_HARDWARE_WAVE_CAPS_OUTPUT:
 625         /* this converter is not a hardware driver */
 626     case ACMDM_FILTERTAG_DETAILS:
 627     case ACMDM_FILTER_DETAILS:
 628         /* this converter is not a filter */
 629     case ACMDM_STREAM_RESET:
 630         /* only needed for asynchronous driver... we aren't, so just say it */
 631         return MMSYSERR_NOTSUPPORTED;
 632     case ACMDM_STREAM_PREPARE:
 633     case ACMDM_STREAM_UNPREPARE:
 634         /* nothing special to do here... so don't do anything */
 635         return MMSYSERR_NOERROR;
 636
 637     default:
 638         return DefDriverProc(dwDevID, hDriv, wMsg, dwParam1, dwParam2);
 639     }
 640 }