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   1 /*
   2  * MS ADPCM 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 "wine/debug.h"
  35
  36 /* see http://www.pcisys.net/~melanson/codecs/adpcm.txt for the details */
  37
  38 WINE_DEFAULT_DEBUG_CHANNEL(adpcm);
  39
  40 /***********************************************************************
  41  *           ADPCM_drvOpen
  42  */
  43 static LRESULT ADPCM_drvOpen(LPCSTR str)
  44 {
  45     return 1;
  46 }
  47
  48 /***********************************************************************
  49  *           ADPCM_drvClose
  50  */
  51 static LRESULT ADPCM_drvClose(DWORD_PTR dwDevID)
  52 {
  53     return 1;
  54 }
  55
  56 typedef struct tagAcmAdpcmData
  57 {
  58     void (*convert)(const ACMDRVSTREAMINSTANCE *adsi,
  59                     const unsigned char*, LPDWORD, unsigned char*, LPDWORD);
  60 } AcmAdpcmData;
  61
  62 /* table to list all supported formats... those are the basic ones. this
  63  * also helps given a unique index to each of the supported formats
  64  */
  65 typedef struct
  66 {
  67     int         nChannels;
  68     int         nBits;
  69     int         rate;
  70 } Format;
  71
  72 static const Format PCM_Formats[] =
  73 {
  74     {1,  8,  8000}, {2,  8,  8000}, {1, 16,  8000}, {2, 16,  8000},
  75     {1,  8, 11025}, {2,  8, 11025}, {1, 16, 11025}, {2, 16, 11025},
  76     {1,  8, 22050}, {2,  8, 22050}, {1, 16, 22050}, {2, 16, 22050},
  77     {1,  8, 44100}, {2,  8, 44100}, {1, 16, 44100}, {2, 16, 44100},
  78 };
  79
  80 static const Format ADPCM_Formats[] =
  81 {
  82     {1,  4,  8000}, {2, 4,  8000},  {1,  4, 11025}, {2,  4, 11025},
  83     {1,  4, 22050}, {2, 4, 22050},  {1,  4, 44100}, {2,  4, 44100},
  84 };
  85
  86 #define NUM_PCM_FORMATS         (sizeof(PCM_Formats) / sizeof(PCM_Formats[0]))
  87 #define NUM_ADPCM_FORMATS       (sizeof(ADPCM_Formats) / sizeof(ADPCM_Formats[0]))
  88
  89 static int MS_Delta[] =
  90 {
  91     230, 230, 230, 230, 307, 409, 512, 614,
  92     768, 614, 512, 409, 307, 230, 230, 230
  93 };
  94
  95
  96 static ADPCMCOEFSET MSADPCM_CoeffSet[] =
  97 {
  98     {256, 0}, {512, -256}, {0, 0}, {192, 64}, {240, 0}, {460, -208}, {392, -232}
  99 };
 100
 101 /***********************************************************************
 102  *           ADPCM_GetFormatIndex
 103  */
 104 static  DWORD   ADPCM_GetFormatIndex(const WAVEFORMATEX* wfx)
 105 {
 106     int             i, hi;
 107     const Format*   fmts;
 108
 109     switch (wfx->wFormatTag)
 110     {
 111     case WAVE_FORMAT_PCM:
 112         hi = NUM_PCM_FORMATS;
 113         fmts = PCM_Formats;
 114         break;
 115     case WAVE_FORMAT_ADPCM:
 116         hi = NUM_ADPCM_FORMATS;
 117         fmts = ADPCM_Formats;
 118         break;
 119     default:
 120         return 0xFFFFFFFF;
 121     }
 122
 123     for (i = 0; i < hi; i++)
 124     {
 125         if (wfx->nChannels == fmts[i].nChannels &&
 126             wfx->nSamplesPerSec == fmts[i].rate &&
 127             wfx->wBitsPerSample == fmts[i].nBits)
 128             return i;
 129     }
 130
 131     switch (wfx->wFormatTag)
 132     {
 133     case WAVE_FORMAT_PCM:
 134         if(3 > wfx->nChannels &&
 135            wfx->nChannels > 0 &&
 136            wfx->nAvgBytesPerSec == 2 * wfx->nSamplesPerSec * wfx->nChannels &&
 137            wfx->nBlockAlign == 2 * wfx->nChannels &&
 138            wfx->wBitsPerSample == 16)
 139            return hi;
 140         break;
 141     case WAVE_FORMAT_ADPCM:
 142         if(3 > wfx->nChannels &&
 143            wfx->nChannels > 0 &&
 144            wfx->wBitsPerSample == 4 &&
 145            wfx->cbSize == 32)
 146            return hi;
 147         break;
 148     }
 149
 150     return 0xFFFFFFFF;
 151 }
 152
 153 static void     init_wfx_adpcm(ADPCMWAVEFORMAT* awfx)
 154 {
 155     register WAVEFORMATEX*      pwfx = &awfx->wfx;
 156
 157     /* we assume wFormatTag, nChannels, nSamplesPerSec and wBitsPerSample
 158      * have been initialized... */
 159
 160     if (pwfx->wFormatTag != WAVE_FORMAT_ADPCM) {FIXME("wrong FT\n"); return;}
 161     if (ADPCM_GetFormatIndex(pwfx) == 0xFFFFFFFF) {FIXME("wrong fmt\n"); return;}
 162
 163     switch (pwfx->nSamplesPerSec)
 164     {
 165     case  8000: pwfx->nBlockAlign = 256 * pwfx->nChannels;   break;
 166     case 11025: pwfx->nBlockAlign = 256 * pwfx->nChannels;   break;
 167     case 22050: pwfx->nBlockAlign = 512 * pwfx->nChannels;   break;
 168     case 44100: pwfx->nBlockAlign = 1024 * pwfx->nChannels;  break;
 169     default:                               break;
 170     }
 171     pwfx->cbSize = 2 * sizeof(WORD) + 7 * sizeof(ADPCMCOEFSET);
 172     /* 7 is the size of the block head (which contains two samples) */
 173
 174     awfx->wSamplesPerBlock = pwfx->nBlockAlign * 2 / pwfx->nChannels - 12;
 175     pwfx->nAvgBytesPerSec = (pwfx->nSamplesPerSec * pwfx->nBlockAlign) / awfx->wSamplesPerBlock;
 176     awfx->wNumCoef = 7;
 177     memcpy(awfx->aCoef, MSADPCM_CoeffSet, 7 * sizeof(ADPCMCOEFSET));
 178 }
 179
 180 /***********************************************************************
 181  *           R16
 182  *
 183  * Read a 16 bit sample (correctly handles endianess)
 184  */
 185 static inline short  R16(const unsigned char* src)
 186 {
 187     return (short)((unsigned short)src[0] | ((unsigned short)src[1] << 8));
 188 }
 189
 190 /***********************************************************************
 191  *           W16
 192  *
 193  * Write a 16 bit sample (correctly handles endianess)
 194  */
 195 static inline void  W16(unsigned char* dst, short s)
 196 {
 197     dst[0] = LOBYTE(s);
 198     dst[1] = HIBYTE(s);
 199 }
 200
 201 static inline void clamp_sample(int* sample)
 202 {
 203     if (*sample < -32768) *sample = -32768;
 204     if (*sample >  32767) *sample =  32767;
 205 }
 206
 207 static inline void process_nibble(unsigned nibble, int* idelta,
 208                                   int* sample1, int* sample2,
 209                                   const ADPCMCOEFSET* coeff)
 210 {
 211     int sample;
 212     int snibble;
 213
 214     /* nibble is in fact a signed 4 bit integer => propagate sign if needed */
 215     snibble = (nibble & 0x08) ? (nibble - 16) : nibble;
 216     sample = ((*sample1 * coeff->iCoef1) + (*sample2 * coeff->iCoef2)) / 256 +
 217         snibble * *idelta;
 218     clamp_sample(&sample);
 219
 220     *sample2 = *sample1;
 221     *sample1 = sample;
 222     *idelta = ((MS_Delta[nibble] * *idelta) / 256);
 223     if (*idelta < 16) *idelta = 16;
 224 }
 225
 226 static  void cvtSSms16K(const ACMDRVSTREAMINSTANCE *adsi,
 227                         const unsigned char* src, LPDWORD nsrc,
 228                         unsigned char* dst, LPDWORD ndst)
 229 {
 230     int                 ideltaL, ideltaR;
 231     int                 sample1L, sample2L;
 232     int                 sample1R, sample2R;
 233     ADPCMCOEFSET        coeffL, coeffR;
 234     int                 nsamp;
 235     int                 nsamp_blk = ((ADPCMWAVEFORMAT*)adsi->pwfxSrc)->wSamplesPerBlock;
 236     DWORD               nblock = min(*nsrc / adsi->pwfxSrc->nBlockAlign,
 237                                      *ndst / (nsamp_blk * 2 * 2));
 238
 239     *nsrc = nblock * adsi->pwfxSrc->nBlockAlign;
 240     *ndst = nblock * nsamp_blk * 2 * 2;
 241
 242     nsamp_blk -= 2; /* see below for samples from block head */
 243     for (; nblock > 0; nblock--)
 244     {
 245         const unsigned char*    in_src = src;
 246
 247         assert(*src <= 6);
 248         coeffL = MSADPCM_CoeffSet[*src++];
 249         assert(*src <= 6);
 250         coeffR = MSADPCM_CoeffSet[*src++];
 251
 252         ideltaL  = R16(src);    src += 2;
 253         ideltaR  = R16(src);    src += 2;
 254         sample1L = R16(src);    src += 2;
 255         sample1R = R16(src);    src += 2;
 256         sample2L = R16(src);    src += 2;
 257         sample2R = R16(src);    src += 2;
 258
 259         /* store samples from block head */
 260         W16(dst, sample2L);      dst += 2;
 261         W16(dst, sample2R);      dst += 2;
 262         W16(dst, sample1L);      dst += 2;
 263         W16(dst, sample1R);      dst += 2;
 264
 265         for (nsamp = nsamp_blk; nsamp > 0; nsamp--)
 266         {
 267             process_nibble(*src >> 4, &ideltaL, &sample1L, &sample2L, &coeffL);
 268             W16(dst, sample1L); dst += 2;
 269             process_nibble(*src++ & 0x0F, &ideltaR, &sample1R, &sample2R, &coeffR);
 270             W16(dst, sample1R); dst += 2;
 271         }
 272         src = in_src + adsi->pwfxSrc->nBlockAlign;
 273     }
 274 }
 275
 276 static  void cvtMMms16K(const ACMDRVSTREAMINSTANCE *adsi,
 277                         const unsigned char* src, LPDWORD nsrc,
 278                         unsigned char* dst, LPDWORD ndst)
 279 {
 280     int                 idelta;
 281     int                 sample1, sample2;
 282     ADPCMCOEFSET        coeff;
 283     int                 nsamp;
 284     int                 nsamp_blk = ((ADPCMWAVEFORMAT*)adsi->pwfxSrc)->wSamplesPerBlock;
 285     DWORD               nblock = min(*nsrc / adsi->pwfxSrc->nBlockAlign,
 286                                      *ndst / (nsamp_blk * 2));
 287
 288     *nsrc = nblock * adsi->pwfxSrc->nBlockAlign;
 289     *ndst = nblock * nsamp_blk * 2;
 290
 291     nsamp_blk -= 2; /* see below for samples from block head */
 292     for (; nblock > 0; nblock--)
 293     {
 294         const unsigned char*    in_src = src;
 295
 296         assert(*src <= 6);
 297         coeff = MSADPCM_CoeffSet[*src++];
 298
 299         idelta =  R16(src);     src += 2;
 300         sample1 = R16(src);     src += 2;
 301         sample2 = R16(src);     src += 2;
 302
 303         /* store samples from block head */
 304         W16(dst, sample2);      dst += 2;
 305         W16(dst, sample1);      dst += 2;
 306
 307         for (nsamp = nsamp_blk; nsamp > 0; nsamp -= 2)
 308         {
 309             process_nibble(*src >> 4, &idelta, &sample1, &sample2, &coeff);
 310             W16(dst, sample1); dst += 2;
 311             process_nibble(*src++ & 0x0F, &idelta, &sample1, &sample2, &coeff);
 312             W16(dst, sample1); dst += 2;
 313         }
 314         src = in_src + adsi->pwfxSrc->nBlockAlign;
 315     }
 316 }
 317
 318 #if 0
 319 static  void cvtSS16msK(PACMDRVSTREAMINSTANCE adsi,
 320                         const unsigned char* src, LPDWORD nsrc,
 321                         unsigned char* dst, LPDWORD ndst)
 322 {
 323 }
 324
 325 static  void cvtMM16msK(PACMDRVSTREAMINSTANCE adsi,
 326                         const unsigned char* src, LPDWORD nsrc,
 327                         unsigned char* dst, LPDWORD ndst)
 328 {
 329 }
 330 #endif
 331
 332 /***********************************************************************
 333  *           ADPCM_DriverDetails
 334  *
 335  */
 336 static  LRESULT ADPCM_DriverDetails(PACMDRIVERDETAILSW add)
 337 {
 338     add->fccType = ACMDRIVERDETAILS_FCCTYPE_AUDIOCODEC;
 339     add->fccComp = ACMDRIVERDETAILS_FCCCOMP_UNDEFINED;
 340     add->wMid = 0xFF;
 341     add->wPid = 0x00;
 342     add->vdwACM = 0x01000000;
 343     add->vdwDriver = 0x01000000;
 344     add->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CODEC;
 345     add->cFormatTags = 2; /* PCM, MS ADPCM */
 346     add->cFilterTags = 0;
 347     add->hicon = NULL;
 348     MultiByteToWideChar( CP_ACP, 0, "MS-ADPCM", -1,
 349                          add->szShortName, sizeof(add->szShortName)/sizeof(WCHAR) );
 350     MultiByteToWideChar( CP_ACP, 0, "Wine MS ADPCM converter", -1,
 351                          add->szLongName, sizeof(add->szLongName)/sizeof(WCHAR) );
 352     MultiByteToWideChar( CP_ACP, 0, "Brought to you by the Wine team...", -1,
 353                          add->szCopyright, sizeof(add->szCopyright)/sizeof(WCHAR) );
 354     MultiByteToWideChar( CP_ACP, 0, "Refer to LICENSE file", -1,
 355                          add->szLicensing, sizeof(add->szLicensing)/sizeof(WCHAR) );
 356     add->szFeatures[0] = 0;
 357
 358     return MMSYSERR_NOERROR;
 359 }
 360
 361 /***********************************************************************
 362  *           ADPCM_FormatTagDetails
 363  *
 364  */
 365 static  LRESULT ADPCM_FormatTagDetails(PACMFORMATTAGDETAILSW aftd, DWORD dwQuery)
 366 {
 367     static const WCHAR szPcm[]={'P','C','M',0};
 368     static const WCHAR szMsAdPcm[]={'M','i','c','r','o','s','o','f','t',' ','A','D','P','C','M',0};
 369
 370     switch (dwQuery)
 371     {
 372     case ACM_FORMATTAGDETAILSF_INDEX:
 373         if (aftd->dwFormatTagIndex >= 2) return ACMERR_NOTPOSSIBLE;
 374         break;
 375     case ACM_FORMATTAGDETAILSF_LARGESTSIZE:
 376         if (aftd->dwFormatTag == WAVE_FORMAT_UNKNOWN)
 377         {
 378             aftd->dwFormatTagIndex = 1; /* WAVE_FORMAT_ADPCM is bigger than PCM */
 379             break;
 380         }
 381         /* fall thru */
 382     case ACM_FORMATTAGDETAILSF_FORMATTAG:
 383         switch (aftd->dwFormatTag)
 384         {
 385         case WAVE_FORMAT_PCM:   aftd->dwFormatTagIndex = 0; break;
 386         case WAVE_FORMAT_ADPCM: aftd->dwFormatTagIndex = 1; break;
 387         default:                return ACMERR_NOTPOSSIBLE;
 388         }
 389         break;
 390     default:
 391         WARN("Unsupported query %08x\n", dwQuery);
 392         return MMSYSERR_NOTSUPPORTED;
 393     }
 394
 395     aftd->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CODEC;
 396     switch (aftd->dwFormatTagIndex)
 397     {
 398     case 0:
 399         aftd->dwFormatTag = WAVE_FORMAT_PCM;
 400         aftd->cbFormatSize = sizeof(PCMWAVEFORMAT);
 401         aftd->cStandardFormats = NUM_PCM_FORMATS;
 402         lstrcpyW(aftd->szFormatTag, szPcm);
 403         break;
 404     case 1:
 405         aftd->dwFormatTag = WAVE_FORMAT_ADPCM;
 406         aftd->cbFormatSize = sizeof(ADPCMWAVEFORMAT) + (7 - 1) * sizeof(ADPCMCOEFSET);
 407         aftd->cStandardFormats = NUM_ADPCM_FORMATS;
 408         lstrcpyW(aftd->szFormatTag, szMsAdPcm);
 409         break;
 410     }
 411     return MMSYSERR_NOERROR;
 412 }
 413
 414 /***********************************************************************
 415  *           ADPCM_FormatDetails
 416  *
 417  */
 418 static  LRESULT ADPCM_FormatDetails(PACMFORMATDETAILSW afd, DWORD dwQuery)
 419 {
 420     switch (dwQuery)
 421     {
 422     case ACM_FORMATDETAILSF_FORMAT:
 423         if (ADPCM_GetFormatIndex(afd->pwfx) == 0xFFFFFFFF) return ACMERR_NOTPOSSIBLE;
 424         break;
 425     case ACM_FORMATDETAILSF_INDEX:
 426         afd->pwfx->wFormatTag = afd->dwFormatTag;
 427         switch (afd->dwFormatTag)
 428         {
 429         case WAVE_FORMAT_PCM:
 430             if (afd->dwFormatIndex >= NUM_PCM_FORMATS) return ACMERR_NOTPOSSIBLE;
 431             afd->pwfx->nChannels = PCM_Formats[afd->dwFormatIndex].nChannels;
 432             afd->pwfx->nSamplesPerSec = PCM_Formats[afd->dwFormatIndex].rate;
 433             afd->pwfx->wBitsPerSample = PCM_Formats[afd->dwFormatIndex].nBits;
 434             /* native MSACM uses a PCMWAVEFORMAT structure, so cbSize is not accessible
 435              * afd->pwfx->cbSize = 0;
 436              */
 437             afd->pwfx->nBlockAlign =
 438                 (afd->pwfx->nChannels * afd->pwfx->wBitsPerSample) / 8;
 439             afd->pwfx->nAvgBytesPerSec =
 440                 afd->pwfx->nSamplesPerSec * afd->pwfx->nBlockAlign;
 441             break;
 442         case WAVE_FORMAT_ADPCM:
 443             if (afd->dwFormatIndex >= NUM_ADPCM_FORMATS) return ACMERR_NOTPOSSIBLE;
 444             if (afd->cbwfx < sizeof(ADPCMWAVEFORMAT) + (7 - 1) * sizeof(ADPCMCOEFSET))
 445                 return ACMERR_NOTPOSSIBLE;
 446             afd->pwfx->nChannels = ADPCM_Formats[afd->dwFormatIndex].nChannels;
 447             afd->pwfx->nSamplesPerSec = ADPCM_Formats[afd->dwFormatIndex].rate;
 448             afd->pwfx->wBitsPerSample = ADPCM_Formats[afd->dwFormatIndex].nBits;
 449             init_wfx_adpcm((ADPCMWAVEFORMAT*)afd->pwfx);
 450             break;
 451         default:
 452             WARN("Unsupported tag %08x\n", afd->dwFormatTag);
 453             return MMSYSERR_INVALPARAM;
 454         }
 455         break;
 456     default:
 457         WARN("Unsupported query %08x\n", dwQuery);
 458         return MMSYSERR_NOTSUPPORTED;
 459     }
 460     afd->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CODEC;
 461     afd->szFormat[0] = 0; /* let MSACM format this for us... */
 462
 463     return MMSYSERR_NOERROR;
 464 }
 465
 466 /***********************************************************************
 467  *           ADPCM_FormatSuggest
 468  *
 469  */
 470 static  LRESULT ADPCM_FormatSuggest(PACMDRVFORMATSUGGEST adfs)
 471 {
 472     /* some tests ... */
 473     if (adfs->cbwfxSrc < sizeof(PCMWAVEFORMAT) ||
 474         adfs->cbwfxDst < sizeof(PCMWAVEFORMAT) ||
 475         ADPCM_GetFormatIndex(adfs->pwfxSrc) == 0xFFFFFFFF) return ACMERR_NOTPOSSIBLE;
 476     /* FIXME: should do those tests against the real size (according to format tag */
 477
 478     /* If no suggestion for destination, then copy source value */
 479     if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_NCHANNELS))
 480         adfs->pwfxDst->nChannels = adfs->pwfxSrc->nChannels;
 481     if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_NSAMPLESPERSEC))
 482         adfs->pwfxDst->nSamplesPerSec = adfs->pwfxSrc->nSamplesPerSec;
 483
 484     if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_WBITSPERSAMPLE))
 485     {
 486         if (adfs->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM)
 487             adfs->pwfxDst->wBitsPerSample = 4;
 488         else
 489             adfs->pwfxDst->wBitsPerSample = 16;
 490     }
 491     if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_WFORMATTAG))
 492     {
 493         if (adfs->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM)
 494             adfs->pwfxDst->wFormatTag = WAVE_FORMAT_ADPCM;
 495         else
 496             adfs->pwfxDst->wFormatTag = WAVE_FORMAT_PCM;
 497     }
 498
 499     /* recompute other values */
 500     switch (adfs->pwfxDst->wFormatTag)
 501     {
 502     case WAVE_FORMAT_PCM:
 503         adfs->pwfxDst->nBlockAlign = (adfs->pwfxDst->nChannels * adfs->pwfxDst->wBitsPerSample) / 8;
 504         adfs->pwfxDst->nAvgBytesPerSec = adfs->pwfxDst->nSamplesPerSec * adfs->pwfxDst->nBlockAlign;
 505         /* check if result is ok */
 506         if (ADPCM_GetFormatIndex(adfs->pwfxDst) == 0xFFFFFFFF) return ACMERR_NOTPOSSIBLE;
 507         break;
 508     case WAVE_FORMAT_ADPCM:
 509         init_wfx_adpcm((ADPCMWAVEFORMAT*)adfs->pwfxDst);
 510         /* check if result is ok */
 511         if (ADPCM_GetFormatIndex(adfs->pwfxDst) == 0xFFFFFFFF) return ACMERR_NOTPOSSIBLE;
 512         break;
 513     default:
 514         FIXME("\n");
 515         break;
 516     }
 517
 518     return MMSYSERR_NOERROR;
 519 }
 520
 521 /***********************************************************************
 522  *           ADPCM_Reset
 523  *
 524  */
 525 static  void    ADPCM_Reset(PACMDRVSTREAMINSTANCE adsi, AcmAdpcmData* aad)
 526 {
 527 }
 528
 529 /***********************************************************************
 530  *           ADPCM_StreamOpen
 531  *
 532  */
 533 static  LRESULT ADPCM_StreamOpen(PACMDRVSTREAMINSTANCE adsi)
 534 {
 535     AcmAdpcmData*       aad;
 536
 537     assert(!(adsi->fdwOpen & ACM_STREAMOPENF_ASYNC));
 538
 539     if (ADPCM_GetFormatIndex(adsi->pwfxSrc) == 0xFFFFFFFF ||
 540         ADPCM_GetFormatIndex(adsi->pwfxDst) == 0xFFFFFFFF)
 541         return ACMERR_NOTPOSSIBLE;
 542
 543     aad = HeapAlloc(GetProcessHeap(), 0, sizeof(AcmAdpcmData));
 544     if (aad == 0) return MMSYSERR_NOMEM;
 545
 546     adsi->dwDriver = (DWORD)aad;
 547
 548     if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
 549         adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
 550     {
 551         goto theEnd;
 552     }
 553     else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_ADPCM &&
 554              adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
 555     {
 556         /* resampling or mono <=> stereo not available
 557          * ADPCM algo only define 16 bit per sample output
 558          */
 559         if (adsi->pwfxSrc->nSamplesPerSec != adsi->pwfxDst->nSamplesPerSec ||
 560             adsi->pwfxSrc->nChannels != adsi->pwfxDst->nChannels ||
 561             adsi->pwfxDst->wBitsPerSample != 16)
 562             goto theEnd;
 563
 564 #if 0
 565         {
 566             unsigned int nspb = ((IMAADPCMWAVEFORMAT*)adsi->pwfxSrc)->wSamplesPerBlock;
 567             FIXME("spb=%u\n", nspb);
 568
 569             /* we check that in a block, after the header, samples are present on
 570              * 4-sample packet pattern
 571              * we also check that the block alignment is bigger than the expected size
 572              */
 573             if (((nspb - 1) & 3) != 0) goto theEnd;
 574             if ((((nspb - 1) / 2) + 4) * adsi->pwfxSrc->nChannels < adsi->pwfxSrc->nBlockAlign)
 575                 goto theEnd;
 576         }
 577 #endif
 578
 579         /* adpcm decoding... */
 580         if (adsi->pwfxDst->wBitsPerSample == 16 && adsi->pwfxDst->nChannels == 2)
 581             aad->convert = cvtSSms16K;
 582         if (adsi->pwfxDst->wBitsPerSample == 16 && adsi->pwfxDst->nChannels == 1)
 583             aad->convert = cvtMMms16K;
 584     }
 585     else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
 586              adsi->pwfxDst->wFormatTag == WAVE_FORMAT_ADPCM)
 587     {
 588         if (adsi->pwfxSrc->nSamplesPerSec != adsi->pwfxDst->nSamplesPerSec ||
 589             adsi->pwfxSrc->nChannels != adsi->pwfxDst->nChannels ||
 590             adsi->pwfxSrc->wBitsPerSample != 16)
 591             goto theEnd;
 592 #if 0
 593         nspb = ((IMAADPCMWAVEFORMAT*)adsi->pwfxDst)->wSamplesPerBlock;
 594         FIXME("spb=%u\n", nspb);
 595
 596         /* we check that in a block, after the header, samples are present on
 597          * 4-sample packet pattern
 598          * we also check that the block alignment is bigger than the expected size
 599          */
 600         if (((nspb - 1) & 3) != 0) goto theEnd;
 601         if ((((nspb - 1) / 2) + 4) * adsi->pwfxDst->nChannels < adsi->pwfxDst->nBlockAlign)
 602             goto theEnd;
 603 #endif
 604 #if 0
 605         /* adpcm coding... */
 606         if (adsi->pwfxSrc->wBitsPerSample == 16 && adsi->pwfxSrc->nChannels == 2)
 607             aad->convert = cvtSS16msK;
 608         if (adsi->pwfxSrc->wBitsPerSample == 16 && adsi->pwfxSrc->nChannels == 1)
 609             aad->convert = cvtMM16msK;
 610 #endif
 611         FIXME("We don't support encoding yet\n");
 612         goto theEnd;
 613     }
 614     else goto theEnd;
 615     ADPCM_Reset(adsi, aad);
 616
 617     return MMSYSERR_NOERROR;
 618
 619  theEnd:
 620     HeapFree(GetProcessHeap(), 0, aad);
 621     adsi->dwDriver = 0L;
 622     return MMSYSERR_NOTSUPPORTED;
 623 }
 624
 625 /***********************************************************************
 626  *           ADPCM_StreamClose
 627  *
 628  */
 629 static  LRESULT ADPCM_StreamClose(PACMDRVSTREAMINSTANCE adsi)
 630 {
 631     HeapFree(GetProcessHeap(), 0, (void*)adsi->dwDriver);
 632     return MMSYSERR_NOERROR;
 633 }
 634
 635 /***********************************************************************
 636  *           ADPCM_StreamSize
 637  *
 638  */
 639 static  LRESULT ADPCM_StreamSize(const ACMDRVSTREAMINSTANCE *adsi, PACMDRVSTREAMSIZE adss)
 640 {
 641     DWORD nblocks;
 642     WORD wSamplesPerBlock;
 643     /* wSamplesPerBlock formula comes from MSDN ADPCMWAVEFORMAT page.*/
 644     switch (adss->fdwSize)
 645     {
 646     case ACM_STREAMSIZEF_DESTINATION:
 647         /* cbDstLength => cbSrcLength */
 648         if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
 649             adsi->pwfxDst->wFormatTag == WAVE_FORMAT_ADPCM)
 650         {
 651             wSamplesPerBlock = adsi->pwfxDst->nBlockAlign * 2 / adsi->pwfxDst->nChannels - 12;
 652             nblocks = adss->cbDstLength / adsi->pwfxDst->nBlockAlign;
 653             if (nblocks == 0)
 654                 return ACMERR_NOTPOSSIBLE;
 655             adss->cbSrcLength = nblocks * adsi->pwfxSrc->nBlockAlign * wSamplesPerBlock;
 656         }
 657         else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_ADPCM &&
 658                  adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
 659         {
 660             wSamplesPerBlock = adsi->pwfxSrc->nBlockAlign * 2 / adsi->pwfxSrc->nChannels - 12;
 661             nblocks = adss->cbDstLength / (adsi->pwfxDst->nBlockAlign * wSamplesPerBlock);
 662             if (nblocks == 0)
 663                 return ACMERR_NOTPOSSIBLE;
 664             adss->cbSrcLength = nblocks * adsi->pwfxSrc->nBlockAlign;
 665         }
 666         else
 667         {
 668             return MMSYSERR_NOTSUPPORTED;
 669         }
 670         break;
 671     case ACM_STREAMSIZEF_SOURCE:
 672         /* cbSrcLength => cbDstLength */
 673         if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
 674             adsi->pwfxDst->wFormatTag == WAVE_FORMAT_ADPCM)
 675         {
 676             wSamplesPerBlock = adsi->pwfxDst->nBlockAlign * 2 / adsi->pwfxDst->nChannels - 12;
 677             nblocks = adss->cbSrcLength / (adsi->pwfxSrc->nBlockAlign * wSamplesPerBlock);
 678             if (nblocks == 0)
 679                 return ACMERR_NOTPOSSIBLE;
 680             if (adss->cbSrcLength % (adsi->pwfxSrc->nBlockAlign * wSamplesPerBlock))
 681                 /* Round block count up. */
 682                 nblocks++;
 683             adss->cbDstLength = nblocks * adsi->pwfxDst->nBlockAlign;
 684         }
 685         else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_ADPCM &&
 686                  adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
 687         {
 688             wSamplesPerBlock = adsi->pwfxSrc->nBlockAlign * 2 / adsi->pwfxSrc->nChannels - 12;
 689             nblocks = adss->cbSrcLength / adsi->pwfxSrc->nBlockAlign;
 690             if (nblocks == 0)
 691                 return ACMERR_NOTPOSSIBLE;
 692             if (adss->cbSrcLength % adsi->pwfxSrc->nBlockAlign)
 693                 /* Round block count up. */
 694                 nblocks++;
 695             adss->cbDstLength = nblocks * adsi->pwfxDst->nBlockAlign * wSamplesPerBlock;
 696         }
 697         else
 698         {
 699             return MMSYSERR_NOTSUPPORTED;
 700         }
 701         break;
 702     default:
 703         WARN("Unsupported query %08x\n", adss->fdwSize);
 704         return MMSYSERR_NOTSUPPORTED;
 705     }
 706     return MMSYSERR_NOERROR;
 707 }
 708
 709 /***********************************************************************
 710  *           ADPCM_StreamConvert
 711  *
 712  */
 713 static LRESULT ADPCM_StreamConvert(PACMDRVSTREAMINSTANCE adsi, PACMDRVSTREAMHEADER adsh)
 714 {
 715     AcmAdpcmData*       aad = (AcmAdpcmData*)adsi->dwDriver;
 716     DWORD               nsrc = adsh->cbSrcLength;
 717     DWORD               ndst = adsh->cbDstLength;
 718
 719     if (adsh->fdwConvert &
 720         ~(ACM_STREAMCONVERTF_BLOCKALIGN|
 721           ACM_STREAMCONVERTF_END|
 722           ACM_STREAMCONVERTF_START))
 723     {
 724         FIXME("Unsupported fdwConvert (%08x), ignoring it\n", adsh->fdwConvert);
 725     }
 726     /* ACM_STREAMCONVERTF_BLOCKALIGN
 727      *  currently all conversions are block aligned, so do nothing for this flag
 728      * ACM_STREAMCONVERTF_END
 729      *  no pending data, so do nothing for this flag
 730      */
 731     if ((adsh->fdwConvert & ACM_STREAMCONVERTF_START))
 732     {
 733         ADPCM_Reset(adsi, aad);
 734     }
 735
 736     aad->convert(adsi, adsh->pbSrc, &nsrc, adsh->pbDst, &ndst);
 737     adsh->cbSrcLengthUsed = nsrc;
 738     adsh->cbDstLengthUsed = ndst;
 739
 740     return MMSYSERR_NOERROR;
 741 }
 742
 743 /**************************************************************************
 744  *                      ADPCM_DriverProc                        [exported]
 745  */
 746 LRESULT CALLBACK ADPCM_DriverProc(DWORD_PTR dwDevID, HDRVR hDriv, UINT wMsg,
 747                                          LPARAM dwParam1, LPARAM dwParam2)
 748 {
 749     TRACE("(%08lx %p %04x %08lx %08lx);\n",
 750           dwDevID, hDriv, wMsg, dwParam1, dwParam2);
 751
 752     switch (wMsg)
 753     {
 754     case DRV_LOAD:              return 1;
 755     case DRV_FREE:              return 1;
 756     case DRV_OPEN:              return ADPCM_drvOpen((LPSTR)dwParam1);
 757     case DRV_CLOSE:             return ADPCM_drvClose(dwDevID);
 758     case DRV_ENABLE:            return 1;
 759     case DRV_DISABLE:           return 1;
 760     case DRV_QUERYCONFIGURE:    return 1;
 761     case DRV_CONFIGURE:         MessageBoxA(0, "MSACM MS ADPCM filter !", "Wine Driver", MB_OK); return 1;
 762     case DRV_INSTALL:           return DRVCNF_RESTART;
 763     case DRV_REMOVE:            return DRVCNF_RESTART;
 764
 765     case ACMDM_DRIVER_NOTIFY:
 766         /* no caching from other ACM drivers is done so far */
 767         return MMSYSERR_NOERROR;
 768
 769     case ACMDM_DRIVER_DETAILS:
 770         return ADPCM_DriverDetails((PACMDRIVERDETAILSW)dwParam1);
 771
 772     case ACMDM_FORMATTAG_DETAILS:
 773         return ADPCM_FormatTagDetails((PACMFORMATTAGDETAILSW)dwParam1, dwParam2);
 774
 775     case ACMDM_FORMAT_DETAILS:
 776         return ADPCM_FormatDetails((PACMFORMATDETAILSW)dwParam1, dwParam2);
 777
 778     case ACMDM_FORMAT_SUGGEST:
 779         return ADPCM_FormatSuggest((PACMDRVFORMATSUGGEST)dwParam1);
 780
 781     case ACMDM_STREAM_OPEN:
 782         return ADPCM_StreamOpen((PACMDRVSTREAMINSTANCE)dwParam1);
 783
 784     case ACMDM_STREAM_CLOSE:
 785         return ADPCM_StreamClose((PACMDRVSTREAMINSTANCE)dwParam1);
 786
 787     case ACMDM_STREAM_SIZE:
 788         return ADPCM_StreamSize((PACMDRVSTREAMINSTANCE)dwParam1, (PACMDRVSTREAMSIZE)dwParam2);
 789
 790     case ACMDM_STREAM_CONVERT:
 791         return ADPCM_StreamConvert((PACMDRVSTREAMINSTANCE)dwParam1, (PACMDRVSTREAMHEADER)dwParam2);
 792
 793     case ACMDM_HARDWARE_WAVE_CAPS_INPUT:
 794     case ACMDM_HARDWARE_WAVE_CAPS_OUTPUT:
 795         /* this converter is not a hardware driver */
 796     case ACMDM_FILTERTAG_DETAILS:
 797     case ACMDM_FILTER_DETAILS:
 798         /* this converter is not a filter */
 799     case ACMDM_STREAM_RESET:
 800         /* only needed for asynchronous driver... we aren't, so just say it */
 801         return MMSYSERR_NOTSUPPORTED;
 802     case ACMDM_STREAM_PREPARE:
 803     case ACMDM_STREAM_UNPREPARE:
 804         /* nothing special to do here... so don't do anything */
 805         return MMSYSERR_NOERROR;
 806
 807     default:
 808         return DefDriverProc(dwDevID, hDriv, wMsg, dwParam1, dwParam2);
 809     }
 810 }