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, 12000}, {2,  8, 12000}, {1, 16, 12000}, {2, 16, 12000},
  79     {1,  8, 16000}, {2,  8, 16000}, {1, 16, 16000}, {2, 16, 16000},
  80     {1,  8, 22050}, {2,  8, 22050}, {1, 16, 22050}, {2, 16, 22050},
  81     {1,  8, 24000}, {2,  8, 24000}, {1, 16, 24000}, {2, 16, 24000},
  82     {1,  8, 32000}, {2,  8, 32000}, {1, 16, 32000}, {2, 16, 32000},
  83     {1,  8, 44100}, {2,  8, 44100}, {1, 16, 44100}, {2, 16, 44100},
  84     {1,  8, 48000}, {2,  8, 48000}, {1, 16, 48000}, {2, 16, 48000}
  85 };
  86
  87 static const Format MPEG3_Formats[] =
  88 {
  89     {1,  0,  8000}, {2,  0,  8000},
  90     {1,  0, 11025}, {2,  0, 11025},
  91     {1,  0, 12000}, {2,  0, 12000},
  92     {1,  0, 16000}, {2,  0, 16000},
  93     {1,  0, 22050}, {2,  0, 22050},
  94     {1,  0, 24000}, {2,  0, 24000},
  95     {1,  0, 32000}, {2,  0, 32000},
  96     {1,  0, 44100}, {2,  0, 44100},
  97     {1,  0, 48000}, {2,  0, 48000}
  98 };
  99
 100 #define NUM_PCM_FORMATS         (sizeof(PCM_Formats) / sizeof(PCM_Formats[0]))
 101 #define NUM_MPEG3_FORMATS       (sizeof(MPEG3_Formats) / sizeof(MPEG3_Formats[0]))
 102
 103 /***********************************************************************
 104  *           MPEG3_GetFormatIndex
 105  */
 106 static  DWORD   MPEG3_GetFormatIndex(LPWAVEFORMATEX wfx)
 107 {
 108     int         i, hi;
 109     const Format *fmts;
 110
 111     switch (wfx->wFormatTag)
 112     {
 113     case WAVE_FORMAT_PCM:
 114         hi = NUM_PCM_FORMATS;
 115         fmts = PCM_Formats;
 116         break;
 117     case WAVE_FORMAT_MPEGLAYER3:
 118         hi = NUM_MPEG3_FORMATS;
 119         fmts = MPEG3_Formats;
 120         break;
 121     default:
 122         return 0xFFFFFFFF;
 123     }
 124
 125     for (i = 0; i < hi; i++)
 126     {
 127         if (wfx->nChannels == fmts[i].nChannels &&
 128             wfx->nSamplesPerSec == fmts[i].rate &&
 129             (wfx->wBitsPerSample == fmts[i].nBits || !fmts[i].nBits))
 130             return i;
 131     }
 132
 133     return 0xFFFFFFFF;
 134 }
 135
 136 static DWORD get_num_buffered_bytes(struct mpstr *mp)
 137 {
 138     DWORD numBuff = 0;
 139     struct buf * p = mp->tail;
 140     while (p) {
 141         numBuff += p->size - p->pos;
 142         p = p->next;
 143     }
 144     return numBuff;
 145 }
 146
 147 static void mp3_horse(PACMDRVSTREAMINSTANCE adsi,
 148                       const unsigned char* src, LPDWORD nsrc,
 149                       unsigned char* dst, LPDWORD ndst)
 150 {
 151     AcmMpeg3Data*       amd = (AcmMpeg3Data*)adsi->dwDriver;
 152     int                 size, ret;
 153     DWORD               dpos = 0;
 154     DWORD               buffered_before;
 155     DWORD               buffered_during;
 156     DWORD               buffered_after;
 157
 158     /* Skip leading ID v3 header */
 159     if (amd->mp.fsizeold == -1 && !strncmp("ID3", (char*)src, 3))
 160     {
 161         UINT length = 10;
 162         const char *header = (char *)src;
 163
 164         TRACE("Found ID3 v2.%d.%d\n", header[3], header[4]);
 165         length += (header[6] & 0x7F) << 21;
 166         length += (header[7] & 0x7F) << 14;
 167         length += (header[8] & 0x7F) << 7;
 168         length += (header[9] & 0x7F);
 169         TRACE("Length: %u\n", length);
 170         *nsrc = length;
 171         *ndst = 0;
 172         return;
 173     }
 174
 175     buffered_before = get_num_buffered_bytes(&amd->mp);
 176     ret = decodeMP3(&amd->mp, src, *nsrc, dst, *ndst, &size);
 177     buffered_during = get_num_buffered_bytes(&amd->mp);
 178     if (ret != MP3_OK)
 179     {
 180         if (ret == MP3_ERR)
 181             FIXME("Error occurred during decoding!\n");
 182         *ndst = *nsrc = 0;
 183         return;
 184     }
 185     do {
 186         dpos += size;
 187         if (*ndst - dpos < 4608) break;
 188         ret = decodeMP3(&amd->mp, NULL, 0,
 189                         dst + dpos, *ndst - dpos, &size);
 190     } while (ret == MP3_OK);
 191     *ndst = dpos;
 192
 193     buffered_after = get_num_buffered_bytes(&amd->mp);
 194     TRACE("before %d put %d during %d after %d\n", buffered_before, *nsrc, buffered_during, buffered_after);
 195
 196     *nsrc -= buffered_after;
 197     ClearMP3Buffer(&amd->mp);
 198 }
 199
 200 /***********************************************************************
 201  *           MPEG3_DriverDetails
 202  *
 203  */
 204 static  LRESULT MPEG3_DriverDetails(PACMDRIVERDETAILSW add)
 205 {
 206     add->fccType = ACMDRIVERDETAILS_FCCTYPE_AUDIOCODEC;
 207     add->fccComp = ACMDRIVERDETAILS_FCCCOMP_UNDEFINED;
 208     add->wMid = 0xFF;
 209     add->wPid = 0x00;
 210     add->vdwACM = 0x01000000;
 211     add->vdwDriver = 0x01000000;
 212     add->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CODEC;
 213     add->cFormatTags = 2; /* PCM, MPEG3 */
 214     add->cFilterTags = 0;
 215     add->hicon = NULL;
 216     MultiByteToWideChar( CP_ACP, 0, "WINE-MPEG3", -1,
 217                          add->szShortName, sizeof(add->szShortName)/sizeof(WCHAR) );
 218     MultiByteToWideChar( CP_ACP, 0, "Wine MPEG3 decoder", -1,
 219                          add->szLongName, sizeof(add->szLongName)/sizeof(WCHAR) );
 220     MultiByteToWideChar( CP_ACP, 0, "Brought to you by the Wine team (based on mpglib by Michael Hipp)...", -1,
 221                          add->szCopyright, sizeof(add->szCopyright)/sizeof(WCHAR) );
 222     MultiByteToWideChar( CP_ACP, 0, "Refer to LICENSE file", -1,
 223                          add->szLicensing, sizeof(add->szLicensing)/sizeof(WCHAR) );
 224     add->szFeatures[0] = 0;
 225
 226     return MMSYSERR_NOERROR;
 227 }
 228
 229 /***********************************************************************
 230  *           MPEG3_FormatTagDetails
 231  *
 232  */
 233 static  LRESULT MPEG3_FormatTagDetails(PACMFORMATTAGDETAILSW aftd, DWORD dwQuery)
 234 {
 235     static const WCHAR szPcm[]={'P','C','M',0};
 236     static const WCHAR szMpeg3[]={'M','P','e','g','3',0};
 237
 238     switch (dwQuery)
 239     {
 240     case ACM_FORMATTAGDETAILSF_INDEX:
 241         if (aftd->dwFormatTagIndex >= 2) return ACMERR_NOTPOSSIBLE;
 242         break;
 243     case ACM_FORMATTAGDETAILSF_LARGESTSIZE:
 244         if (aftd->dwFormatTag == WAVE_FORMAT_UNKNOWN)
 245         {
 246             aftd->dwFormatTagIndex = 1; /* WAVE_FORMAT_MPEGLAYER3 is bigger than PCM */
 247             break;
 248         }
 249         /* fall thru */
 250     case ACM_FORMATTAGDETAILSF_FORMATTAG:
 251         switch (aftd->dwFormatTag)
 252         {
 253         case WAVE_FORMAT_PCM:           aftd->dwFormatTagIndex = 0; break;
 254         case WAVE_FORMAT_MPEGLAYER3:    aftd->dwFormatTagIndex = 1; break;
 255         default:                        return ACMERR_NOTPOSSIBLE;
 256         }
 257         break;
 258     default:
 259         WARN("Unsupported query %08x\n", dwQuery);
 260         return MMSYSERR_NOTSUPPORTED;
 261     }
 262
 263     aftd->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CODEC;
 264     switch (aftd->dwFormatTagIndex)
 265     {
 266     case 0:
 267         aftd->dwFormatTag = WAVE_FORMAT_PCM;
 268         aftd->cbFormatSize = sizeof(PCMWAVEFORMAT);
 269         aftd->cStandardFormats = NUM_PCM_FORMATS;
 270         lstrcpyW(aftd->szFormatTag, szPcm);
 271         break;
 272     case 1:
 273         aftd->dwFormatTag = WAVE_FORMAT_MPEGLAYER3;
 274         aftd->cbFormatSize = sizeof(MPEGLAYER3WAVEFORMAT);
 275         aftd->cStandardFormats = NUM_MPEG3_FORMATS;
 276         lstrcpyW(aftd->szFormatTag, szMpeg3);
 277         break;
 278     }
 279     return MMSYSERR_NOERROR;
 280 }
 281
 282 static void fill_in_wfx(unsigned cbwfx, WAVEFORMATEX* wfx, unsigned bit_rate)
 283 {
 284     MPEGLAYER3WAVEFORMAT*   mp3wfx = (MPEGLAYER3WAVEFORMAT*)wfx;
 285
 286     wfx->nAvgBytesPerSec = bit_rate / 8;
 287     if (cbwfx >= sizeof(WAVEFORMATEX))
 288         wfx->cbSize = sizeof(MPEGLAYER3WAVEFORMAT) - sizeof(WAVEFORMATEX);
 289     if (cbwfx >= sizeof(MPEGLAYER3WAVEFORMAT))
 290     {
 291         mp3wfx->wID = MPEGLAYER3_ID_MPEG;
 292         mp3wfx->fdwFlags = MPEGLAYER3_FLAG_PADDING_OFF;
 293         mp3wfx->nBlockSize = (bit_rate * 144) / wfx->nSamplesPerSec;
 294         mp3wfx->nFramesPerBlock = 1;
 295         mp3wfx->nCodecDelay = 0x0571;
 296     }
 297 }
 298
 299 /***********************************************************************
 300  *           MPEG3_FormatDetails
 301  *
 302  */
 303 static  LRESULT MPEG3_FormatDetails(PACMFORMATDETAILSW afd, DWORD dwQuery)
 304 {
 305     switch (dwQuery)
 306     {
 307     case ACM_FORMATDETAILSF_FORMAT:
 308         if (MPEG3_GetFormatIndex(afd->pwfx) == 0xFFFFFFFF) return ACMERR_NOTPOSSIBLE;
 309         break;
 310     case ACM_FORMATDETAILSF_INDEX:
 311         afd->pwfx->wFormatTag = afd->dwFormatTag;
 312         switch (afd->dwFormatTag)
 313         {
 314         case WAVE_FORMAT_PCM:
 315             if (afd->dwFormatIndex >= NUM_PCM_FORMATS) return ACMERR_NOTPOSSIBLE;
 316             afd->pwfx->nChannels = PCM_Formats[afd->dwFormatIndex].nChannels;
 317             afd->pwfx->nSamplesPerSec = PCM_Formats[afd->dwFormatIndex].rate;
 318             afd->pwfx->wBitsPerSample = PCM_Formats[afd->dwFormatIndex].nBits;
 319             /* native MSACM uses a PCMWAVEFORMAT structure, so cbSize is not accessible
 320              * afd->pwfx->cbSize = 0;
 321              */
 322             afd->pwfx->nBlockAlign =
 323                 (afd->pwfx->nChannels * afd->pwfx->wBitsPerSample) / 8;
 324             afd->pwfx->nAvgBytesPerSec =
 325                 afd->pwfx->nSamplesPerSec * afd->pwfx->nBlockAlign;
 326             break;
 327         case WAVE_FORMAT_MPEGLAYER3:
 328             if (afd->dwFormatIndex >= NUM_MPEG3_FORMATS) return ACMERR_NOTPOSSIBLE;
 329             afd->pwfx->nChannels = MPEG3_Formats[afd->dwFormatIndex].nChannels;
 330             afd->pwfx->nSamplesPerSec = MPEG3_Formats[afd->dwFormatIndex].rate;
 331             afd->pwfx->wBitsPerSample = MPEG3_Formats[afd->dwFormatIndex].nBits;
 332             afd->pwfx->nBlockAlign = 1;
 333             fill_in_wfx(afd->cbwfx, afd->pwfx, 192000);
 334             break;
 335         default:
 336             WARN("Unsupported tag %08x\n", afd->dwFormatTag);
 337             return MMSYSERR_INVALPARAM;
 338         }
 339         break;
 340     default:
 341         WARN("Unsupported query %08x\n", dwQuery);
 342         return MMSYSERR_NOTSUPPORTED;
 343     }
 344     afd->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CODEC;
 345     afd->szFormat[0] = 0; /* let MSACM format this for us... */
 346
 347     return MMSYSERR_NOERROR;
 348 }
 349
 350 /***********************************************************************
 351  *           MPEG3_FormatSuggest
 352  *
 353  */
 354 static  LRESULT MPEG3_FormatSuggest(PACMDRVFORMATSUGGEST adfs)
 355 {
 356     /* some tests ... */
 357     if (adfs->cbwfxSrc < sizeof(PCMWAVEFORMAT) ||
 358         adfs->cbwfxDst < sizeof(PCMWAVEFORMAT) ||
 359         MPEG3_GetFormatIndex(adfs->pwfxSrc) == 0xFFFFFFFF) return ACMERR_NOTPOSSIBLE;
 360     /* FIXME: should do those tests against the real size (according to format tag */
 361
 362     /* If no suggestion for destination, then copy source value */
 363     if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_NCHANNELS))
 364         adfs->pwfxDst->nChannels = adfs->pwfxSrc->nChannels;
 365     if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_NSAMPLESPERSEC))
 366         adfs->pwfxDst->nSamplesPerSec = adfs->pwfxSrc->nSamplesPerSec;
 367
 368     if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_WBITSPERSAMPLE))
 369     {
 370         if (adfs->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM)
 371             adfs->pwfxDst->wBitsPerSample = 4;
 372         else
 373             adfs->pwfxDst->wBitsPerSample = 16;
 374     }
 375     if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_WFORMATTAG))
 376     {
 377         if (adfs->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM)
 378             adfs->pwfxDst->wFormatTag = WAVE_FORMAT_MPEGLAYER3;
 379         else
 380             adfs->pwfxDst->wFormatTag = WAVE_FORMAT_PCM;
 381     }
 382
 383     /* check if result is ok */
 384     if (MPEG3_GetFormatIndex(adfs->pwfxDst) == 0xFFFFFFFF) return ACMERR_NOTPOSSIBLE;
 385
 386     /* recompute other values */
 387     switch (adfs->pwfxDst->wFormatTag)
 388     {
 389     case WAVE_FORMAT_PCM:
 390         adfs->pwfxDst->nBlockAlign = (adfs->pwfxDst->nChannels * adfs->pwfxDst->wBitsPerSample) / 8;
 391         adfs->pwfxDst->nAvgBytesPerSec = adfs->pwfxDst->nSamplesPerSec * adfs->pwfxDst->nBlockAlign;
 392         break;
 393     case WAVE_FORMAT_MPEGLAYER3:
 394         adfs->pwfxDst->nBlockAlign = 1;
 395         fill_in_wfx(adfs->cbwfxDst, adfs->pwfxDst, 192000);
 396         break;
 397     default:
 398         FIXME("\n");
 399         break;
 400     }
 401
 402     return MMSYSERR_NOERROR;
 403 }
 404
 405 /***********************************************************************
 406  *           MPEG3_Reset
 407  *
 408  */
 409 static void MPEG3_Reset(PACMDRVSTREAMINSTANCE adsi, AcmMpeg3Data* aad)
 410 {
 411     ClearMP3Buffer(&aad->mp);
 412     InitMP3(&aad->mp);
 413 }
 414
 415 /***********************************************************************
 416  *           MPEG3_StreamOpen
 417  *
 418  */
 419 static  LRESULT MPEG3_StreamOpen(PACMDRVSTREAMINSTANCE adsi)
 420 {
 421     AcmMpeg3Data*       aad;
 422
 423     assert(!(adsi->fdwOpen & ACM_STREAMOPENF_ASYNC));
 424
 425     if (MPEG3_GetFormatIndex(adsi->pwfxSrc) == 0xFFFFFFFF ||
 426         MPEG3_GetFormatIndex(adsi->pwfxDst) == 0xFFFFFFFF)
 427         return ACMERR_NOTPOSSIBLE;
 428
 429     aad = HeapAlloc(GetProcessHeap(), 0, sizeof(AcmMpeg3Data));
 430     if (aad == 0) return MMSYSERR_NOMEM;
 431
 432     adsi->dwDriver = (DWORD_PTR)aad;
 433
 434     if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
 435         adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
 436     {
 437         goto theEnd;
 438     }
 439     else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_MPEGLAYER3 &&
 440              adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
 441     {
 442         /* resampling or mono <=> stereo not available
 443          * MPEG3 algo only define 16 bit per sample output
 444          */
 445         if (adsi->pwfxSrc->nSamplesPerSec != adsi->pwfxDst->nSamplesPerSec ||
 446             adsi->pwfxSrc->nChannels != adsi->pwfxDst->nChannels ||
 447             adsi->pwfxDst->wBitsPerSample != 16)
 448             goto theEnd;
 449         aad->convert = mp3_horse;
 450         InitMP3(&aad->mp);
 451     }
 452     /* no encoding yet
 453     else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
 454              adsi->pwfxDst->wFormatTag == WAVE_FORMAT_MPEGLAYER3)
 455     */
 456     else goto theEnd;
 457     MPEG3_Reset(adsi, aad);
 458
 459     return MMSYSERR_NOERROR;
 460
 461  theEnd:
 462     HeapFree(GetProcessHeap(), 0, aad);
 463     adsi->dwDriver = 0L;
 464     return MMSYSERR_NOTSUPPORTED;
 465 }
 466
 467 /***********************************************************************
 468  *           MPEG3_StreamClose
 469  *
 470  */
 471 static  LRESULT MPEG3_StreamClose(PACMDRVSTREAMINSTANCE adsi)
 472 {
 473     ClearMP3Buffer(&((AcmMpeg3Data*)adsi->dwDriver)->mp);
 474     HeapFree(GetProcessHeap(), 0, (void*)adsi->dwDriver);
 475     return MMSYSERR_NOERROR;
 476 }
 477
 478 /***********************************************************************
 479  *           MPEG3_StreamSize
 480  *
 481  */
 482 static  LRESULT MPEG3_StreamSize(PACMDRVSTREAMINSTANCE adsi, PACMDRVSTREAMSIZE adss)
 483 {
 484     DWORD nblocks;
 485
 486     switch (adss->fdwSize)
 487     {
 488     case ACM_STREAMSIZEF_DESTINATION:
 489         /* cbDstLength => cbSrcLength */
 490         if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
 491             adsi->pwfxDst->wFormatTag == WAVE_FORMAT_MPEGLAYER3)
 492         {
 493             nblocks = (adss->cbDstLength - 3000) / (DWORD)(adsi->pwfxDst->nAvgBytesPerSec * 1152 / adsi->pwfxDst->nSamplesPerSec + 0.5);
 494             if (nblocks == 0)
 495                 return ACMERR_NOTPOSSIBLE;
 496             adss->cbSrcLength = nblocks * 1152 * adsi->pwfxSrc->nBlockAlign;
 497         }
 498         else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_MPEGLAYER3 &&
 499                  adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
 500         {
 501             nblocks = adss->cbDstLength / (adsi->pwfxDst->nBlockAlign * 1152);
 502             if (nblocks == 0)
 503                 return ACMERR_NOTPOSSIBLE;
 504             adss->cbSrcLength = nblocks * (DWORD)(adsi->pwfxSrc->nAvgBytesPerSec * 1152 / adsi->pwfxSrc->nSamplesPerSec);
 505         }
 506         else
 507         {
 508             return MMSYSERR_NOTSUPPORTED;
 509         }
 510         break;
 511     case ACM_STREAMSIZEF_SOURCE:
 512         /* cbSrcLength => cbDstLength */
 513         if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
 514             adsi->pwfxDst->wFormatTag == WAVE_FORMAT_MPEGLAYER3)
 515         {
 516             nblocks = adss->cbSrcLength / (adsi->pwfxSrc->nBlockAlign * 1152);
 517             if (nblocks == 0)
 518                 return ACMERR_NOTPOSSIBLE;
 519             if (adss->cbSrcLength % (DWORD)(adsi->pwfxSrc->nBlockAlign * 1152))
 520                 /* Round block count up. */
 521                 nblocks++;
 522             adss->cbDstLength = 3000 + nblocks * (DWORD)(adsi->pwfxDst->nAvgBytesPerSec * 1152 / adsi->pwfxDst->nSamplesPerSec + 0.5);
 523         }
 524         else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_MPEGLAYER3 &&
 525                  adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
 526         {
 527             nblocks = adss->cbSrcLength / (DWORD)(adsi->pwfxSrc->nAvgBytesPerSec * 1152 / adsi->pwfxSrc->nSamplesPerSec);
 528             if (nblocks == 0)
 529                 return ACMERR_NOTPOSSIBLE;
 530             if (adss->cbSrcLength % (DWORD)(adsi->pwfxSrc->nAvgBytesPerSec * 1152 / adsi->pwfxSrc->nSamplesPerSec))
 531                 /* Round block count up. */
 532                 nblocks++;
 533             adss->cbDstLength = nblocks * 1152 * adsi->pwfxDst->nBlockAlign;
 534         }
 535         else
 536         {
 537             return MMSYSERR_NOTSUPPORTED;
 538         }
 539         break;
 540     default:
 541         WARN("Unsupported query %08x\n", adss->fdwSize);
 542         return MMSYSERR_NOTSUPPORTED;
 543     }
 544     return MMSYSERR_NOERROR;
 545 }
 546
 547 /***********************************************************************
 548  *           MPEG3_StreamConvert
 549  *
 550  */
 551 static LRESULT MPEG3_StreamConvert(PACMDRVSTREAMINSTANCE adsi, PACMDRVSTREAMHEADER adsh)
 552 {
 553     AcmMpeg3Data*       aad = (AcmMpeg3Data*)adsi->dwDriver;
 554     DWORD               nsrc = adsh->cbSrcLength;
 555     DWORD               ndst = adsh->cbDstLength;
 556
 557     if (adsh->fdwConvert &
 558         ~(ACM_STREAMCONVERTF_BLOCKALIGN|
 559           ACM_STREAMCONVERTF_END|
 560           ACM_STREAMCONVERTF_START))
 561     {
 562         FIXME("Unsupported fdwConvert (%08x), ignoring it\n", adsh->fdwConvert);
 563     }
 564     /* ACM_STREAMCONVERTF_BLOCKALIGN
 565      *  currently all conversions are block aligned, so do nothing for this flag
 566      * ACM_STREAMCONVERTF_END
 567      *  no pending data, so do nothing for this flag
 568      */
 569     if ((adsh->fdwConvert & ACM_STREAMCONVERTF_START))
 570     {
 571         MPEG3_Reset(adsi, aad);
 572     }
 573
 574     aad->convert(adsi, adsh->pbSrc, &nsrc, adsh->pbDst, &ndst);
 575     adsh->cbSrcLengthUsed = nsrc;
 576     adsh->cbDstLengthUsed = ndst;
 577
 578     return MMSYSERR_NOERROR;
 579 }
 580
 581 /**************************************************************************
 582  *                      MPEG3_DriverProc                        [exported]
 583  */
 584 LRESULT CALLBACK MPEG3_DriverProc(DWORD_PTR dwDevID, HDRVR hDriv, UINT wMsg,
 585                                          LPARAM dwParam1, LPARAM dwParam2)
 586 {
 587     TRACE("(%08lx %p %04x %08lx %08lx);\n",
 588           dwDevID, hDriv, wMsg, dwParam1, dwParam2);
 589
 590     switch (wMsg)
 591     {
 592     case DRV_LOAD:              return 1;
 593     case DRV_FREE:              return 1;
 594     case DRV_OPEN:              return MPEG3_drvOpen((LPSTR)dwParam1);
 595     case DRV_CLOSE:             return MPEG3_drvClose(dwDevID);
 596     case DRV_ENABLE:            return 1;
 597     case DRV_DISABLE:           return 1;
 598     case DRV_QUERYCONFIGURE:    return 1;
 599     case DRV_CONFIGURE:         MessageBoxA(0, "MPEG3 filter !", "Wine Driver", MB_OK); return 1;
 600     case DRV_INSTALL:           return DRVCNF_RESTART;
 601     case DRV_REMOVE:            return DRVCNF_RESTART;
 602
 603     case ACMDM_DRIVER_NOTIFY:
 604         /* no caching from other ACM drivers is done so far */
 605         return MMSYSERR_NOERROR;
 606
 607     case ACMDM_DRIVER_DETAILS:
 608         return MPEG3_DriverDetails((PACMDRIVERDETAILSW)dwParam1);
 609
 610     case ACMDM_FORMATTAG_DETAILS:
 611         return MPEG3_FormatTagDetails((PACMFORMATTAGDETAILSW)dwParam1, dwParam2);
 612
 613     case ACMDM_FORMAT_DETAILS:
 614         return MPEG3_FormatDetails((PACMFORMATDETAILSW)dwParam1, dwParam2);
 615
 616     case ACMDM_FORMAT_SUGGEST:
 617         return MPEG3_FormatSuggest((PACMDRVFORMATSUGGEST)dwParam1);
 618
 619     case ACMDM_STREAM_OPEN:
 620         return MPEG3_StreamOpen((PACMDRVSTREAMINSTANCE)dwParam1);
 621
 622     case ACMDM_STREAM_CLOSE:
 623         return MPEG3_StreamClose((PACMDRVSTREAMINSTANCE)dwParam1);
 624
 625     case ACMDM_STREAM_SIZE:
 626         return MPEG3_StreamSize((PACMDRVSTREAMINSTANCE)dwParam1, (PACMDRVSTREAMSIZE)dwParam2);
 627
 628     case ACMDM_STREAM_CONVERT:
 629         return MPEG3_StreamConvert((PACMDRVSTREAMINSTANCE)dwParam1, (PACMDRVSTREAMHEADER)dwParam2);
 630
 631     case ACMDM_HARDWARE_WAVE_CAPS_INPUT:
 632     case ACMDM_HARDWARE_WAVE_CAPS_OUTPUT:
 633         /* this converter is not a hardware driver */
 634     case ACMDM_FILTERTAG_DETAILS:
 635     case ACMDM_FILTER_DETAILS:
 636         /* this converter is not a filter */
 637     case ACMDM_STREAM_RESET:
 638         /* only needed for asynchronous driver... we aren't, so just say it */
 639         return MMSYSERR_NOTSUPPORTED;
 640     case ACMDM_STREAM_PREPARE:
 641     case ACMDM_STREAM_UNPREPARE:
 642         /* nothing special to do here... so don't do anything */
 643         return MMSYSERR_NOERROR;
 644
 645     default:
 646         return DefDriverProc(dwDevID, hDriv, wMsg, dwParam1, dwParam2);
 647     }
 648 }