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             if TRACE_ON(mpeg3)
 178             {
 179                 long rate;
 180                 int channels, enc;
 181                 mpg123_getformat(amd->mh, &rate, &channels, &enc);
 182                 TRACE("New format: %li Hz, %i channels, encoding value %i\n", rate, channels, enc);
 183             }
 184         }
 185         dpos += size;
 186     } while (ret == MPG123_OK);
 187     *ndst = dpos;
 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...", -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     mpg123_feedseek(aad->mh, 0, SEEK_SET, NULL);
 402     mpg123_close(aad->mh);
 403     mpg123_open_feed(aad->mh);
 404 }
 405
 406 /***********************************************************************
 407  *           MPEG3_StreamOpen
 408  *
 409  */
 410 static  LRESULT MPEG3_StreamOpen(PACMDRVSTREAMINSTANCE adsi)
 411 {
 412     AcmMpeg3Data*       aad;
 413     int err;
 414
 415     assert(!(adsi->fdwOpen & ACM_STREAMOPENF_ASYNC));
 416
 417     if (MPEG3_GetFormatIndex(adsi->pwfxSrc) == 0xFFFFFFFF ||
 418         MPEG3_GetFormatIndex(adsi->pwfxDst) == 0xFFFFFFFF)
 419         return ACMERR_NOTPOSSIBLE;
 420
 421     aad = HeapAlloc(GetProcessHeap(), 0, sizeof(AcmMpeg3Data));
 422     if (aad == 0) return MMSYSERR_NOMEM;
 423
 424     adsi->dwDriver = (DWORD_PTR)aad;
 425
 426     if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
 427         adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
 428     {
 429         goto theEnd;
 430     }
 431     else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_MPEGLAYER3 &&
 432              adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
 433     {
 434         /* resampling or mono <=> stereo not available
 435          * MPEG3 algo only define 16 bit per sample output
 436          */
 437         if (adsi->pwfxSrc->nSamplesPerSec != adsi->pwfxDst->nSamplesPerSec ||
 438             adsi->pwfxSrc->nChannels != adsi->pwfxDst->nChannels ||
 439             adsi->pwfxDst->wBitsPerSample != 16)
 440             goto theEnd;
 441         aad->convert = mp3_horse;
 442         aad->mh = mpg123_new(NULL,&err);
 443         mpg123_open_feed(aad->mh);
 444     }
 445     /* no encoding yet
 446     else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
 447              adsi->pwfxDst->wFormatTag == WAVE_FORMAT_MPEGLAYER3)
 448     */
 449     else goto theEnd;
 450     MPEG3_Reset(adsi, aad);
 451
 452     return MMSYSERR_NOERROR;
 453
 454  theEnd:
 455     HeapFree(GetProcessHeap(), 0, aad);
 456     adsi->dwDriver = 0L;
 457     return MMSYSERR_NOTSUPPORTED;
 458 }
 459
 460 /***********************************************************************
 461  *           MPEG3_StreamClose
 462  *
 463  */
 464 static  LRESULT MPEG3_StreamClose(PACMDRVSTREAMINSTANCE adsi)
 465 {
 466     mpg123_close(((AcmMpeg3Data*)adsi->dwDriver)->mh);
 467     mpg123_delete(((AcmMpeg3Data*)adsi->dwDriver)->mh);
 468     HeapFree(GetProcessHeap(), 0, (void*)adsi->dwDriver);
 469     return MMSYSERR_NOERROR;
 470 }
 471
 472 /***********************************************************************
 473  *           MPEG3_StreamSize
 474  *
 475  */
 476 static  LRESULT MPEG3_StreamSize(PACMDRVSTREAMINSTANCE adsi, PACMDRVSTREAMSIZE adss)
 477 {
 478     DWORD nblocks;
 479
 480     switch (adss->fdwSize)
 481     {
 482     case ACM_STREAMSIZEF_DESTINATION:
 483         /* cbDstLength => cbSrcLength */
 484         if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
 485             adsi->pwfxDst->wFormatTag == WAVE_FORMAT_MPEGLAYER3)
 486         {
 487             nblocks = (adss->cbDstLength - 3000) / (DWORD)(adsi->pwfxDst->nAvgBytesPerSec * 1152 / adsi->pwfxDst->nSamplesPerSec + 0.5);
 488             if (nblocks == 0)
 489                 return ACMERR_NOTPOSSIBLE;
 490             adss->cbSrcLength = nblocks * 1152 * adsi->pwfxSrc->nBlockAlign;
 491         }
 492         else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_MPEGLAYER3 &&
 493                  adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
 494         {
 495             nblocks = adss->cbDstLength / (adsi->pwfxDst->nBlockAlign * 1152);
 496             if (nblocks == 0)
 497                 return ACMERR_NOTPOSSIBLE;
 498             adss->cbSrcLength = nblocks * (DWORD)(adsi->pwfxSrc->nAvgBytesPerSec * 1152 / adsi->pwfxSrc->nSamplesPerSec);
 499         }
 500         else
 501         {
 502             return MMSYSERR_NOTSUPPORTED;
 503         }
 504         break;
 505     case ACM_STREAMSIZEF_SOURCE:
 506         /* cbSrcLength => cbDstLength */
 507         if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
 508             adsi->pwfxDst->wFormatTag == WAVE_FORMAT_MPEGLAYER3)
 509         {
 510             nblocks = adss->cbSrcLength / (adsi->pwfxSrc->nBlockAlign * 1152);
 511             if (nblocks == 0)
 512                 return ACMERR_NOTPOSSIBLE;
 513             if (adss->cbSrcLength % (DWORD)(adsi->pwfxSrc->nBlockAlign * 1152))
 514                 /* Round block count up. */
 515                 nblocks++;
 516             adss->cbDstLength = 3000 + nblocks * (DWORD)(adsi->pwfxDst->nAvgBytesPerSec * 1152 / adsi->pwfxDst->nSamplesPerSec + 0.5);
 517         }
 518         else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_MPEGLAYER3 &&
 519                  adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
 520         {
 521             nblocks = adss->cbSrcLength / (DWORD)(adsi->pwfxSrc->nAvgBytesPerSec * 1152 / adsi->pwfxSrc->nSamplesPerSec);
 522             if (nblocks == 0)
 523                 return ACMERR_NOTPOSSIBLE;
 524             if (adss->cbSrcLength % (DWORD)(adsi->pwfxSrc->nAvgBytesPerSec * 1152 / adsi->pwfxSrc->nSamplesPerSec))
 525                 /* Round block count up. */
 526                 nblocks++;
 527             adss->cbDstLength = nblocks * 1152 * adsi->pwfxDst->nBlockAlign;
 528         }
 529         else
 530         {
 531             return MMSYSERR_NOTSUPPORTED;
 532         }
 533         break;
 534     default:
 535         WARN("Unsupported query %08x\n", adss->fdwSize);
 536         return MMSYSERR_NOTSUPPORTED;
 537     }
 538     return MMSYSERR_NOERROR;
 539 }
 540
 541 /***********************************************************************
 542  *           MPEG3_StreamConvert
 543  *
 544  */
 545 static LRESULT MPEG3_StreamConvert(PACMDRVSTREAMINSTANCE adsi, PACMDRVSTREAMHEADER adsh)
 546 {
 547     AcmMpeg3Data*       aad = (AcmMpeg3Data*)adsi->dwDriver;
 548     DWORD               nsrc = adsh->cbSrcLength;
 549     DWORD               ndst = adsh->cbDstLength;
 550
 551     if (adsh->fdwConvert &
 552         ~(ACM_STREAMCONVERTF_BLOCKALIGN|
 553           ACM_STREAMCONVERTF_END|
 554           ACM_STREAMCONVERTF_START))
 555     {
 556         FIXME("Unsupported fdwConvert (%08x), ignoring it\n", adsh->fdwConvert);
 557     }
 558     /* ACM_STREAMCONVERTF_BLOCKALIGN
 559      *  currently all conversions are block aligned, so do nothing for this flag
 560      * ACM_STREAMCONVERTF_END
 561      *  no pending data, so do nothing for this flag
 562      */
 563     if ((adsh->fdwConvert & ACM_STREAMCONVERTF_START))
 564     {
 565         MPEG3_Reset(adsi, aad);
 566     }
 567
 568     aad->convert(adsi, adsh->pbSrc, &nsrc, adsh->pbDst, &ndst);
 569     adsh->cbSrcLengthUsed = nsrc;
 570     adsh->cbDstLengthUsed = ndst;
 571
 572     return MMSYSERR_NOERROR;
 573 }
 574
 575 /**************************************************************************
 576  *                      MPEG3_DriverProc                        [exported]
 577  */
 578 LRESULT CALLBACK MPEG3_DriverProc(DWORD_PTR dwDevID, HDRVR hDriv, UINT wMsg,
 579                                          LPARAM dwParam1, LPARAM dwParam2)
 580 {
 581     TRACE("(%08lx %p %04x %08lx %08lx);\n",
 582           dwDevID, hDriv, wMsg, dwParam1, dwParam2);
 583
 584     switch (wMsg)
 585     {
 586     case DRV_LOAD:              return 1;
 587     case DRV_FREE:              return 1;
 588     case DRV_OPEN:              return MPEG3_drvOpen((LPSTR)dwParam1);
 589     case DRV_CLOSE:             return MPEG3_drvClose(dwDevID);
 590     case DRV_ENABLE:            return 1;
 591     case DRV_DISABLE:           return 1;
 592     case DRV_QUERYCONFIGURE:    return 1;
 593     case DRV_CONFIGURE:         MessageBoxA(0, "MPEG3 filter !", "Wine Driver", MB_OK); return 1;
 594     case DRV_INSTALL:           return DRVCNF_RESTART;
 595     case DRV_REMOVE:            return DRVCNF_RESTART;
 596
 597     case ACMDM_DRIVER_NOTIFY:
 598         /* no caching from other ACM drivers is done so far */
 599         return MMSYSERR_NOERROR;
 600
 601     case ACMDM_DRIVER_DETAILS:
 602         return MPEG3_DriverDetails((PACMDRIVERDETAILSW)dwParam1);
 603
 604     case ACMDM_FORMATTAG_DETAILS:
 605         return MPEG3_FormatTagDetails((PACMFORMATTAGDETAILSW)dwParam1, dwParam2);
 606
 607     case ACMDM_FORMAT_DETAILS:
 608         return MPEG3_FormatDetails((PACMFORMATDETAILSW)dwParam1, dwParam2);
 609
 610     case ACMDM_FORMAT_SUGGEST:
 611         return MPEG3_FormatSuggest((PACMDRVFORMATSUGGEST)dwParam1);
 612
 613     case ACMDM_STREAM_OPEN:
 614         return MPEG3_StreamOpen((PACMDRVSTREAMINSTANCE)dwParam1);
 615
 616     case ACMDM_STREAM_CLOSE:
 617         return MPEG3_StreamClose((PACMDRVSTREAMINSTANCE)dwParam1);
 618
 619     case ACMDM_STREAM_SIZE:
 620         return MPEG3_StreamSize((PACMDRVSTREAMINSTANCE)dwParam1, (PACMDRVSTREAMSIZE)dwParam2);
 621
 622     case ACMDM_STREAM_CONVERT:
 623         return MPEG3_StreamConvert((PACMDRVSTREAMINSTANCE)dwParam1, (PACMDRVSTREAMHEADER)dwParam2);
 624
 625     case ACMDM_HARDWARE_WAVE_CAPS_INPUT:
 626     case ACMDM_HARDWARE_WAVE_CAPS_OUTPUT:
 627         /* this converter is not a hardware driver */
 628     case ACMDM_FILTERTAG_DETAILS:
 629     case ACMDM_FILTER_DETAILS:
 630         /* this converter is not a filter */
 631     case ACMDM_STREAM_RESET:
 632         /* only needed for asynchronous driver... we aren't, so just say it */
 633         return MMSYSERR_NOTSUPPORTED;
 634     case ACMDM_STREAM_PREPARE:
 635     case ACMDM_STREAM_UNPREPARE:
 636         /* nothing special to do here... so don't do anything */
 637         return MMSYSERR_NOERROR;
 638
 639     default:
 640         return DefDriverProc(dwDevID, hDriv, wMsg, dwParam1, dwParam2);
 641     }
 642 }