dlls/msacm32/pcmconverter.c

   1 /* -*- tab-width: 8; c-basic-offset: 4 -*- */
   2
   3 /*
   4  *      MSACM32 library
   5  *
   6  *      Copyright 2000          Eric Pouech
   7  *      Copyright 2004          Robert Reif
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  22  *
  23  *      FIXME / TODO list
  24  *      + get rid of hack for PCM_DriverProc (msacm32.dll shouldn't export
  25  *        a DriverProc, but this would require implementing a generic
  26  *        embedded driver handling scheme in msacm32.dll which isn't done yet
  27  */
  28
  29 #include "config.h"
  30
  31 #include <assert.h>
  32 #include <stdarg.h>
  33 #include <string.h>
  34
  35 #include "windef.h"
  36 #include "winbase.h"
  37 #include "mmsystem.h"
  38 #define NOBITMAP
  39 #include "mmreg.h"
  40 #include "msacm.h"
  41 #include "wingdi.h"
  42 #include "winnls.h"
  43 #include "winuser.h"
  44
  45 #include "msacmdrv.h"
  46 #include "wineacm.h"
  47
  48 #include "wine/debug.h"
  49
  50 WINE_DEFAULT_DEBUG_CHANNEL(msacm);
  51
  52 /***********************************************************************
  53  *           PCM_drvOpen
  54  */
  55 static  DWORD   PCM_drvOpen(LPCSTR str, PACMDRVOPENDESCW adod)
  56 {
  57     TRACE("(%p, %p)\n", str, adod);
  58
  59     return (adod == NULL) ||
  60         (adod->fccType == ACMDRIVERDETAILS_FCCTYPE_AUDIOCODEC &&
  61          adod->fccComp == ACMDRIVERDETAILS_FCCCOMP_UNDEFINED);
  62 }
  63
  64 /***********************************************************************
  65  *           PCM_drvClose
  66  */
  67 static  DWORD   PCM_drvClose(DWORD dwDevID)
  68 {
  69     TRACE("(%d)\n", dwDevID);
  70
  71     return 1;
  72 }
  73
  74 #define NUM_PCM_FORMATS (sizeof(PCM_Formats) / sizeof(PCM_Formats[0]))
  75 #define NUM_OF(a,b)     ((a)/(b))
  76
  77 /* flags for fdwDriver */
  78 #define PCM_RESAMPLE    1
  79
  80 typedef void (*PCM_CONVERT_KEEP_RATE)(const unsigned char*, int, unsigned char*);
  81
  82 typedef void (*PCM_CONVERT_CHANGE_RATE)(const DWORD, const unsigned char*, DWORD*, const DWORD, unsigned char*, DWORD*);
  83
  84 /* data used while converting */
  85 typedef struct tagAcmPcmData {
  86     /* conversion routine, depending if rate conversion is required */
  87     union {
  88         PCM_CONVERT_KEEP_RATE cvtKeepRate;
  89         PCM_CONVERT_CHANGE_RATE cvtChangeRate;
  90     } cvt;
  91 } AcmPcmData;
  92
  93 /* table to list all supported formats... those are the basic ones. this
  94  * also helps given a unique index to each of the supported formats
  95  */
  96 static const struct {
  97     int         nChannels;
  98     int         nBits;
  99     int         rate;
 100 } PCM_Formats[] = {
 101     {1,  8,  8000}, {2,  8,  8000}, {1, 16,  8000}, {2, 16,  8000}, {1, 24,  8000}, {2, 24,  8000},
 102     {1,  8, 11025}, {2,  8, 11025}, {1, 16, 11025}, {2, 16, 11025}, {1, 24, 11025}, {2, 24, 11025},
 103     {1,  8, 22050}, {2,  8, 22050}, {1, 16, 22050}, {2, 16, 22050}, {1, 24, 22050}, {2, 24, 22050},
 104     {1,  8, 44100}, {2,  8, 44100}, {1, 16, 44100}, {2, 16, 44100}, {1, 24, 44100}, {2, 24, 44100},
 105     {1,  8, 48000}, {2,  8, 48000}, {1, 16, 48000}, {2, 16, 48000}, {1, 24, 48000}, {2, 24, 48000},
 106     {1,  8, 96000}, {2,  8, 96000}, {1, 16, 96000}, {2, 16, 96000}, {1, 24, 96000}, {2, 24, 96000},
 107 };
 108
 109 /***********************************************************************
 110  *           PCM_GetFormatIndex
 111  */
 112 static DWORD PCM_GetFormatIndex(LPWAVEFORMATEX wfx)
 113 {
 114     unsigned int i;
 115     TRACE("(%p)\n", wfx);
 116
 117     for (i = 0; i < NUM_PCM_FORMATS; i++) {
 118         if (wfx->nChannels == PCM_Formats[i].nChannels &&
 119             wfx->nSamplesPerSec == PCM_Formats[i].rate &&
 120             wfx->wBitsPerSample == PCM_Formats[i].nBits)
 121             return i;
 122     }
 123     return 0xFFFFFFFF;
 124 }
 125
 126 /* PCM Conversions:
 127  *
 128  * parameters:
 129  *      + 8 bit unsigned vs 16 bit signed
 130  *      + mono vs stereo (1 or 2 channels)
 131  *      + sampling rate (8.0, 11.025, 22.05, 44.1 kHz are defined, but algo
 132  *        shall work in all cases)
 133  *
 134  * mono => stereo: copy the same sample on Left & Right channels
 135  * stereo => mono: use the sum of Left & Right channels
 136  */
 137
 138 /***********************************************************************
 139  *           C816
 140  *
 141  * Converts a 8 bit sample to a 16 bit one
 142  */
 143 static inline short C816(unsigned char b)
 144 {
 145     return (b - 128) << 8;
 146 }
 147
 148 /***********************************************************************
 149  *           C168
 150  *
 151  * Converts a 16 bit sample to a 8 bit one (data loss !!)
 152  */
 153 static inline unsigned char C168(short s)
 154 {
 155     return HIBYTE(s) ^ (unsigned char)0x80;
 156 }
 157
 158 /***********************************************************************
 159  *           C248
 160  *
 161  * Converts a 24 bit sample to a 8 bit one (data loss !!)
 162  */
 163 static inline unsigned char C248(int s)
 164 {
 165     return HIBYTE(HIWORD(s)) ^ (unsigned char)0x80;
 166 }
 167
 168 /***********************************************************************
 169  *           C2416
 170  *
 171  * Converts a 24 bit sample to a 16 bit one (data loss !!)
 172  */
 173 static inline short C2416(int s)
 174 {
 175     return HIWORD(s);
 176 }
 177
 178 /***********************************************************************
 179  *           R16
 180  *
 181  * Read a 16 bit sample (correctly handles endianness)
 182  */
 183 static inline short  R16(const unsigned char* src)
 184 {
 185     return (short)((unsigned short)src[0] | ((unsigned short)src[1] << 8));
 186 }
 187
 188 /***********************************************************************
 189  *           R24
 190  *
 191  * Read a 24 bit sample (correctly handles endianness)
 192  * Note, to support signed arithmetic, the values are shifted high in the int
 193  * and low 8 bytes are unused.
 194  */
 195 static inline int R24(const unsigned char* src)
 196 {
 197     return ((int)src[0] | (int)src[1] << 8 | (int)src[2] << 16) << 8;
 198 }
 199
 200 /***********************************************************************
 201  *           W16
 202  *
 203  * Write a 16 bit sample (correctly handles endianness)
 204  */
 205 static inline void  W16(unsigned char* dst, short s)
 206 {
 207     dst[0] = LOBYTE(s);
 208     dst[1] = HIBYTE(s);
 209 }
 210
 211 /***********************************************************************
 212  *           W24
 213  *
 214  * Write a 24 bit sample (correctly handles endianness)
 215  */
 216 static inline void  W24(unsigned char* dst, int s)
 217 {
 218     dst[0] = HIBYTE(LOWORD(s));
 219     dst[1] = LOBYTE(HIWORD(s));
 220     dst[2] = HIBYTE(HIWORD(s));
 221 }
 222
 223 /***********************************************************************
 224  *           M24
 225  *
 226  * Convert the (l,r) 24 bit stereo sample into a 24 bit mono
 227  * (takes the sum of the two values)
 228  */
 229 static inline int M24(int l, int r)
 230 {
 231     LONGLONG sum = l + r;
 232
 233     /* clip sum to saturation */
 234     if (sum > 0x7fffff00)
 235         sum = 0x7fffff00;
 236     else if (sum < -0x7fffff00)
 237         sum = -0x7fffff00;
 238
 239     return sum;
 240 }
 241
 242 /***********************************************************************
 243  *           M16
 244  *
 245  * Convert the (l,r) 16 bit stereo sample into a 16 bit mono
 246  * (takes the sum of the two values)
 247  */
 248 static inline short M16(short l, short r)
 249 {
 250     int sum = l + r;
 251
 252     /* clip sum to saturation */
 253     if (sum > 32767)
 254         sum = 32767;
 255     else if (sum < -32768)
 256         sum = -32768;
 257
 258     return sum;
 259 }
 260
 261 /***********************************************************************
 262  *           M8
 263  *
 264  * Convert the (l,r) 8 bit stereo sample into a 8 bit mono
 265  * (takes the sum of the two values)
 266  */
 267 static inline unsigned char M8(unsigned char a, unsigned char b)
 268 {
 269     int l = a - 128;
 270     int r = b - 128;
 271     int sum = (l + r) + 128;
 272
 273     /* clip sum to saturation */
 274     if (sum > 0xff)
 275         sum = 0xff;
 276     else if (sum < 0)
 277         sum = 0;
 278
 279     return sum;
 280 }
 281
 282 /* the conversion routines without rate conversion are labelled cvt<X><Y><N><M>K
 283  * where :
 284  * <X> is the (M)ono/(S)tereo configuration of  input channel
 285  * <Y> is the (M)ono/(S)tereo configuration of output channel
 286  * <N> is the number of bits of  input channel (8 or 16)
 287  * <M> is the number of bits of output channel (8 or 16)
 288  *
 289  * in the parameters, ns is always the number of samples, so the size of input
 290  * buffer (resp output buffer) is ns * (<X> == 'Mono' ? 1:2) * (<N> == 8 ? 1:2)
 291  */
 292
 293 static  void cvtMM88K(const unsigned char* src, int ns, unsigned char* dst)
 294 {
 295     TRACE("(%p, %d, %p)\n", src, ns, dst);
 296     memcpy(dst, src, ns);
 297 }
 298
 299 static  void cvtSS88K(const unsigned char* src, int ns, unsigned char* dst)
 300 {
 301     TRACE("(%p, %d, %p)\n", src, ns, dst);
 302     memcpy(dst, src, ns * 2);
 303 }
 304
 305 static  void cvtMM1616K(const unsigned char* src, int ns, unsigned char* dst)
 306 {
 307     TRACE("(%p, %d, %p)\n", src, ns, dst);
 308     memcpy(dst, src, ns * 2);
 309 }
 310
 311 static  void cvtSS1616K(const unsigned char* src, int ns, unsigned char* dst)
 312 {
 313     TRACE("(%p, %d, %p)\n", src, ns, dst);
 314     memcpy(dst, src, ns * 4);
 315 }
 316
 317 static  void cvtMS88K(const unsigned char* src, int ns, unsigned char* dst)
 318 {
 319     TRACE("(%p, %d, %p)\n", src, ns, dst);
 320
 321     while (ns--) {
 322         *dst++ = *src;
 323         *dst++ = *src++;
 324     }
 325 }
 326
 327 static  void cvtMS816K(const unsigned char* src, int ns, unsigned char* dst)
 328 {
 329     short       v;
 330     TRACE("(%p, %d, %p)\n", src, ns, dst);
 331
 332     while (ns--) {
 333         v = C816(*src++);
 334         W16(dst, v);            dst += 2;
 335         W16(dst, v);            dst += 2;
 336     }
 337 }
 338
 339 static  void cvtMS168K(const unsigned char* src, int ns, unsigned char* dst)
 340 {
 341     unsigned char v;
 342     TRACE("(%p, %d, %p)\n", src, ns, dst);
 343
 344     while (ns--) {
 345         v = C168(R16(src));     src += 2;
 346         *dst++ = v;
 347         *dst++ = v;
 348     }
 349 }
 350
 351 static  void cvtMS1616K(const unsigned char* src, int ns, unsigned char* dst)
 352 {
 353     short       v;
 354     TRACE("(%p, %d, %p)\n", src, ns, dst);
 355
 356     while (ns--) {
 357         v = R16(src);           src += 2;
 358         W16(dst, v);            dst += 2;
 359         W16(dst, v);            dst += 2;
 360     }
 361 }
 362
 363 static  void cvtSM88K(const unsigned char* src, int ns, unsigned char* dst)
 364 {
 365     TRACE("(%p, %d, %p)\n", src, ns, dst);
 366
 367     while (ns--) {
 368         *dst++ = M8(src[0], src[1]);
 369         src += 2;
 370     }
 371 }
 372
 373 static  void cvtSM816K(const unsigned char* src, int ns, unsigned char* dst)
 374 {
 375     short       v;
 376     TRACE("(%p, %d, %p)\n", src, ns, dst);
 377
 378     while (ns--) {
 379         v = M16(C816(src[0]), C816(src[1]));
 380         src += 2;
 381         W16(dst, v);            dst += 2;
 382     }
 383 }
 384
 385 static  void cvtSM168K(const unsigned char* src, int ns, unsigned char* dst)
 386 {
 387     TRACE("(%p, %d, %p)\n", src, ns, dst);
 388
 389     while (ns--) {
 390         *dst++ = C168(M16(R16(src), R16(src + 2)));
 391         src += 4;
 392     }
 393 }
 394
 395 static  void cvtSM1616K(const unsigned char* src, int ns, unsigned char* dst)
 396 {
 397     TRACE("(%p, %d, %p)\n", src, ns, dst);
 398
 399     while (ns--) {
 400         W16(dst, M16(R16(src),R16(src+2)));     dst += 2;
 401         src += 4;
 402     }
 403 }
 404
 405 static  void cvtMM816K(const unsigned char* src, int ns, unsigned char* dst)
 406 {
 407     TRACE("(%p, %d, %p)\n", src, ns, dst);
 408
 409     while (ns--) {
 410         W16(dst, C816(*src++));         dst += 2;
 411     }
 412 }
 413
 414 static  void cvtSS816K(const unsigned char* src, int ns, unsigned char* dst)
 415 {
 416     TRACE("(%p, %d, %p)\n", src, ns, dst);
 417
 418     while (ns--) {
 419         W16(dst, C816(*src++)); dst += 2;
 420         W16(dst, C816(*src++)); dst += 2;
 421     }
 422 }
 423
 424 static  void cvtMM168K(const unsigned char* src, int ns, unsigned char* dst)
 425 {
 426     TRACE("(%p, %d, %p)\n", src, ns, dst);
 427
 428     while (ns--) {
 429         *dst++ = C168(R16(src));        src += 2;
 430     }
 431 }
 432
 433 static  void cvtSS168K(const unsigned char* src, int ns, unsigned char* dst)
 434 {
 435     TRACE("(%p, %d, %p)\n", src, ns, dst);
 436
 437     while (ns--) {
 438         *dst++ = C168(R16(src));        src += 2;
 439         *dst++ = C168(R16(src));        src += 2;
 440     }
 441 }
 442
 443 static  void cvtMS248K(const unsigned char* src, int ns, unsigned char* dst)
 444 {
 445     unsigned char v;
 446     TRACE("(%p, %d, %p)\n", src, ns, dst);
 447
 448     while (ns--) {
 449         v = C248(R24(src));     src += 3;
 450         *dst++ = v;
 451         *dst++ = v;
 452     }
 453 }
 454
 455 static  void cvtSM248K(const unsigned char* src, int ns, unsigned char* dst)
 456 {
 457     TRACE("(%p, %d, %p)\n", src, ns, dst);
 458
 459     while (ns--) {
 460         *dst++ = C248(M24(R24(src), R24(src + 3)));
 461         src += 6;
 462     }
 463 }
 464
 465 static  void cvtMM248K(const unsigned char* src, int ns, unsigned char* dst)
 466 {
 467     TRACE("(%p, %d, %p)\n", src, ns, dst);
 468
 469     while (ns--) {
 470         *dst++ = C248(R24(src));        src += 3;
 471     }
 472 }
 473
 474 static  void cvtSS248K(const unsigned char* src, int ns, unsigned char* dst)
 475 {
 476     TRACE("(%p, %d, %p)\n", src, ns, dst);
 477
 478     while (ns--) {
 479         *dst++ = C248(R24(src));        src += 3;
 480         *dst++ = C248(R24(src));        src += 3;
 481     }
 482 }
 483
 484 static  void cvtMS2416K(const unsigned char* src, int ns, unsigned char* dst)
 485 {
 486     short v;
 487     TRACE("(%p, %d, %p)\n", src, ns, dst);
 488
 489     while (ns--) {
 490         v = C2416(R24(src));    src += 3;
 491         W16(dst, v);    dst += 2;
 492         W16(dst, v);    dst += 2;
 493     }
 494 }
 495
 496 static  void cvtSM2416K(const unsigned char* src, int ns, unsigned char* dst)
 497 {
 498     TRACE("(%p, %d, %p)\n", src, ns, dst);
 499
 500     while (ns--) {
 501         W16(dst, C2416(M24(R24(src), R24(src + 3))));
 502         dst += 2;
 503         src += 6;
 504     }
 505 }
 506
 507 static  void cvtMM2416K(const unsigned char* src, int ns, unsigned char* dst)
 508 {
 509     TRACE("(%p, %d, %p)\n", src, ns, dst);
 510
 511     while (ns--) {
 512         W16(dst, C2416(R24(src)));      dst += 2; src += 3;
 513     }
 514 }
 515
 516 static  void cvtSS2416K(const unsigned char* src, int ns, unsigned char* dst)
 517 {
 518     TRACE("(%p, %d, %p)\n", src, ns, dst);
 519
 520     while (ns--) {
 521         W16(dst, C2416(R24(src)));      dst += 2; src += 3;
 522         W16(dst, C2416(R24(src)));      dst += 2; src += 3;
 523     }
 524 }
 525
 526
 527 static const PCM_CONVERT_KEEP_RATE PCM_ConvertKeepRate[] = {
 528     cvtSS88K,   cvtSM88K,   cvtMS88K,   cvtMM88K,
 529     cvtSS816K,  cvtSM816K,  cvtMS816K,  cvtMM816K,
 530     NULL, NULL, NULL, NULL, /* TODO: 8->24 */
 531     cvtSS168K,  cvtSM168K,  cvtMS168K,  cvtMM168K,
 532     cvtSS1616K, cvtSM1616K, cvtMS1616K, cvtMM1616K,
 533     NULL, NULL, NULL, NULL, /* TODO: 16->24 */
 534     cvtSS248K, cvtSM248K, cvtMS248K, cvtMM248K,
 535     cvtSS2416K, cvtSM2416K, cvtMS2416K, cvtMM2416K,
 536     NULL, NULL, NULL, NULL, /* TODO: 24->24 */
 537 };
 538
 539 /* the conversion routines with rate conversion are labelled cvt<X><Y><N><M>C
 540  * where :
 541  * <X> is the (M)ono/(S)tereo configuration of  input channel
 542  * <Y> is the (M)ono/(S)tereo configuration of output channel
 543  * <N> is the number of bits of  input channel (8 or 16)
 544  * <M> is the number of bits of output channel (8 or 16)
 545  *
 546  */
 547
 548 static void cvtSS88C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
 549                      const DWORD dstRate, unsigned char *dst, DWORD *ndst)
 550 {
 551     DWORD error = srcRate / 2;
 552     DWORD maxSrc = *nsrc, maxDst = *ndst;
 553     *ndst = 0;
 554     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
 555         error += dstRate;
 556         while (error > srcRate) {
 557             if (*ndst == maxDst)
 558                 return;
 559             (*ndst)++;
 560             error -= srcRate;
 561
 562             *dst++ = src[0];
 563             *dst++ = src[1];
 564         }
 565         src += 2;
 566     }
 567 }
 568
 569 static void cvtSM88C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
 570                      const DWORD dstRate, unsigned char *dst, DWORD *ndst)
 571 {
 572     DWORD error = srcRate / 2;
 573     DWORD maxSrc = *nsrc, maxDst = *ndst;
 574     *ndst = 0;
 575     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
 576         error += dstRate;
 577         while (error > srcRate) {
 578             if (*ndst == maxDst)
 579                 return;
 580             (*ndst)++;
 581             error -= srcRate;
 582
 583             *dst++ = M8(src[0], src[1]);
 584         }
 585         src += 2;
 586     }
 587 }
 588
 589 static void cvtMS88C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
 590                      const DWORD dstRate, unsigned char *dst, DWORD *ndst)
 591 {
 592     DWORD error = srcRate / 2;
 593     DWORD maxSrc = *nsrc, maxDst = *ndst;
 594     *ndst = 0;
 595     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
 596         error += dstRate;
 597         while (error > srcRate) {
 598             if (*ndst == maxDst)
 599                 return;
 600             (*ndst)++;
 601             error -= srcRate;
 602
 603             *dst++ = src[0];
 604             *dst++ = src[0];
 605         }
 606         src += 1;
 607     }
 608 }
 609
 610 static void cvtMM88C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
 611                      const DWORD dstRate, unsigned char *dst, DWORD *ndst)
 612 {
 613     DWORD error = srcRate / 2;
 614     DWORD maxSrc = *nsrc, maxDst = *ndst;
 615     *ndst = 0;
 616     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
 617         error += dstRate;
 618         while (error > srcRate) {
 619             if (*ndst == maxDst)
 620                 return;
 621             (*ndst)++;
 622             error -= srcRate;
 623
 624             *dst++ = src[0];
 625         }
 626         src += 1;
 627     }
 628 }
 629
 630 static void cvtSS816C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
 631                       const DWORD dstRate, unsigned char *dst, DWORD *ndst)
 632 {
 633     DWORD error = srcRate / 2;
 634     DWORD maxSrc = *nsrc, maxDst = *ndst;
 635     *ndst = 0;
 636     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
 637         error += dstRate;
 638         while (error > srcRate) {
 639             if (*ndst == maxDst)
 640                 return;
 641             (*ndst)++;
 642             error -= srcRate;
 643
 644             W16(dst, C816(src[0])); dst += 2;
 645             W16(dst, C816(src[1])); dst += 2;
 646         }
 647         src += 2;
 648     }
 649 }
 650
 651 static void cvtSM816C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
 652                       const DWORD dstRate, unsigned char *dst, DWORD *ndst)
 653 {
 654     DWORD error = srcRate / 2;
 655     DWORD maxSrc = *nsrc, maxDst = *ndst;
 656     *ndst = 0;
 657     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
 658         error += dstRate;
 659         while (error > srcRate) {
 660             if (*ndst == maxDst)
 661                 return;
 662             (*ndst)++;
 663             error -= srcRate;
 664
 665             W16(dst, M16(C816(src[0]), C816(src[1]))); dst += 2;
 666         }
 667         src += 2;
 668     }
 669 }
 670
 671 static void cvtMS816C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
 672                       const DWORD dstRate, unsigned char *dst, DWORD *ndst)
 673 {
 674     DWORD error = srcRate / 2;
 675     DWORD maxSrc = *nsrc, maxDst = *ndst;
 676     *ndst = 0;
 677     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
 678         error += dstRate;
 679         while (error > srcRate) {
 680             if (*ndst == maxDst)
 681                 return;
 682             (*ndst)++;
 683             error -= srcRate;
 684
 685             W16(dst, C816(src[0])); dst += 2;
 686             W16(dst, C816(src[0])); dst += 2;
 687         }
 688         src += 1;
 689     }
 690 }
 691
 692 static void cvtMM816C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
 693                       const DWORD dstRate, unsigned char *dst, DWORD *ndst)
 694 {
 695     DWORD error = srcRate / 2;
 696     DWORD maxSrc = *nsrc, maxDst = *ndst;
 697     *ndst = 0;
 698     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
 699         error += dstRate;
 700         while (error > srcRate) {
 701             if (*ndst == maxDst)
 702                 return;
 703             (*ndst)++;
 704             error -= srcRate;
 705
 706             W16(dst, C816(src[0])); dst += 2;
 707         }
 708         src += 1;
 709     }
 710 }
 711
 712 static void cvtSS168C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
 713                       const DWORD dstRate, unsigned char *dst, DWORD *ndst)
 714 {
 715     DWORD error = srcRate / 2;
 716     DWORD maxSrc = *nsrc, maxDst = *ndst;
 717     *ndst = 0;
 718     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
 719         error += dstRate;
 720         while (error > srcRate) {
 721             if (*ndst == maxDst)
 722                 return;
 723             (*ndst)++;
 724             error -= srcRate;
 725
 726             *dst++ = C168(R16(src));
 727             *dst++ = C168(R16(src + 2));
 728         }
 729         src += 4;
 730     }
 731 }
 732
 733 static void cvtSM168C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
 734                       const DWORD dstRate, unsigned char *dst, DWORD *ndst)
 735 {
 736     DWORD error = srcRate / 2;
 737     DWORD maxSrc = *nsrc, maxDst = *ndst;
 738     *ndst = 0;
 739     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
 740         error += dstRate;
 741         while (error > srcRate) {
 742             if (*ndst == maxDst)
 743                 return;
 744             (*ndst)++;
 745             error -= srcRate;
 746
 747             *dst++ = C168(M16(R16(src), R16(src + 2)));
 748         }
 749         src += 4;
 750     }
 751 }
 752
 753 static void cvtMS168C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
 754                       const DWORD dstRate, unsigned char *dst, DWORD *ndst)
 755 {
 756     DWORD error = srcRate / 2;
 757     DWORD maxSrc = *nsrc, maxDst = *ndst;
 758     *ndst = 0;
 759     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
 760         error += dstRate;
 761         while (error > srcRate) {
 762             if (*ndst == maxDst)
 763                 return;
 764             (*ndst)++;
 765             error -= srcRate;
 766
 767             *dst++ = C168(R16(src));
 768             *dst++ = C168(R16(src));
 769         }
 770         src += 2;
 771     }
 772 }
 773
 774 static void cvtMM168C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
 775                       const DWORD dstRate, unsigned char *dst, DWORD *ndst)
 776 {
 777     DWORD error = srcRate / 2;
 778     DWORD maxSrc = *nsrc, maxDst = *ndst;
 779     *ndst = 0;
 780     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
 781         error += dstRate;
 782         while (error > srcRate) {
 783             if (*ndst == maxDst)
 784                 return;
 785             (*ndst)++;
 786             error -= srcRate;
 787
 788             *dst++ = C168(R16(src));
 789         }
 790         src += 2;
 791     }
 792 }
 793
 794 static void cvtSS1616C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
 795                        const DWORD dstRate, unsigned char *dst, DWORD *ndst)
 796 {
 797     DWORD error = srcRate / 2;
 798     DWORD maxSrc = *nsrc, maxDst = *ndst;
 799     *ndst = 0;
 800     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
 801         error += dstRate;
 802         while (error > srcRate) {
 803             if (*ndst == maxDst)
 804                 return;
 805             (*ndst)++;
 806             error -= srcRate;
 807
 808             W16(dst, R16(src)); dst += 2;
 809             W16(dst, R16(src + 2)); dst += 2;
 810         }
 811         src += 4;
 812     }
 813 }
 814
 815 static void cvtSM1616C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
 816                        const DWORD dstRate, unsigned char *dst, DWORD *ndst)
 817 {
 818     DWORD error = srcRate / 2;
 819     DWORD maxSrc = *nsrc, maxDst = *ndst;
 820     *ndst = 0;
 821     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
 822         error += dstRate;
 823         while (error > srcRate) {
 824             if (*ndst == maxDst)
 825                 return;
 826             (*ndst)++;
 827             error -= srcRate;
 828
 829             W16(dst, M16(R16(src), R16(src + 2))); dst += 2;
 830         }
 831         src += 4;
 832     }
 833 }
 834
 835 static void cvtMS1616C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
 836                        const DWORD dstRate, unsigned char *dst, DWORD *ndst)
 837 {
 838     DWORD error = srcRate / 2;
 839     DWORD maxSrc = *nsrc, maxDst = *ndst;
 840     *ndst = 0;
 841     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
 842         error += dstRate;
 843         while (error > srcRate) {
 844             if (*ndst == maxDst)
 845                 return;
 846             (*ndst)++;
 847             error -= srcRate;
 848
 849             W16(dst, R16(src)); dst += 2;
 850             W16(dst, R16(src)); dst += 2;
 851         }
 852         src += 2;
 853     }
 854 }
 855
 856 static void cvtMM1616C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
 857                        const DWORD dstRate, unsigned char *dst, DWORD *ndst)
 858 {
 859     DWORD error = srcRate / 2;
 860     DWORD maxSrc = *nsrc, maxDst = *ndst;
 861     *ndst = 0;
 862     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
 863         error += dstRate;
 864         while (error > srcRate) {
 865             if (*ndst == maxDst)
 866                 return;
 867             (*ndst)++;
 868             error -= srcRate;
 869
 870             W16(dst, R16(src)); dst += 2;
 871         }
 872         src += 2;
 873     }
 874 }
 875
 876 static void cvtSS2424C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
 877                        const DWORD dstRate, unsigned char *dst, DWORD *ndst)
 878 {
 879     DWORD error = srcRate / 2;
 880     DWORD maxSrc = *nsrc, maxDst = *ndst;
 881     *ndst = 0;
 882     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
 883         error += dstRate;
 884         while (error > srcRate) {
 885             if (*ndst == maxDst)
 886                 return;
 887             (*ndst)++;
 888             error -= srcRate;
 889
 890             W24(dst, R24(src)); dst += 3;
 891             W24(dst, R24(src + 3)); dst += 3;
 892         }
 893         src += 6;
 894     }
 895 }
 896
 897 static void cvtSM2424C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
 898                        const DWORD dstRate, unsigned char *dst, DWORD *ndst)
 899 {
 900     DWORD error = srcRate / 2;
 901     DWORD maxSrc = *nsrc, maxDst = *ndst;
 902     *ndst = 0;
 903     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
 904         error += dstRate;
 905         while (error > srcRate) {
 906             if (*ndst == maxDst)
 907                 return;
 908             (*ndst)++;
 909             error -= srcRate;
 910
 911             W24(dst, M24(R24(src), R24(src + 3))); dst += 3;
 912         }
 913         src += 6;
 914     }
 915 }
 916
 917 static void cvtMS2424C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
 918                        const DWORD dstRate, unsigned char *dst, DWORD *ndst)
 919 {
 920     DWORD error = srcRate / 2;
 921     DWORD maxSrc = *nsrc, maxDst = *ndst;
 922     *ndst = 0;
 923     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
 924         error += dstRate;
 925         while (error > srcRate) {
 926             if (*ndst == maxDst)
 927                 return;
 928             (*ndst)++;
 929             error -= srcRate;
 930
 931             W24(dst, R24(src)); dst += 3;
 932             W24(dst, R24(src)); dst += 3;
 933         }
 934         src += 3;
 935     }
 936 }
 937
 938 static void cvtMM2424C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
 939                        const DWORD dstRate, unsigned char *dst, DWORD *ndst)
 940 {
 941     DWORD error = srcRate / 2;
 942     DWORD maxSrc = *nsrc, maxDst = *ndst;
 943     *ndst = 0;
 944     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
 945         error += dstRate;
 946         while (error > srcRate) {
 947             if (*ndst == maxDst)
 948                 return;
 949             (*ndst)++;
 950             error -= srcRate;
 951
 952             W24(dst, R24(src)); dst += 3;
 953         }
 954         src += 3;
 955     }
 956 }
 957
 958 static const PCM_CONVERT_CHANGE_RATE PCM_ConvertChangeRate[] = {
 959     cvtSS88C,   cvtSM88C,   cvtMS88C,   cvtMM88C,
 960     cvtSS816C,  cvtSM816C,  cvtMS816C,  cvtMM816C,
 961     NULL, NULL, NULL, NULL, /* TODO: 8->24 */
 962     cvtSS168C,  cvtSM168C,  cvtMS168C,  cvtMM168C,
 963     cvtSS1616C, cvtSM1616C, cvtMS1616C, cvtMM1616C,
 964     NULL, NULL, NULL, NULL, /* TODO: 16->24 */
 965     NULL, NULL, NULL, NULL, /* TODO: 24->8 */
 966     NULL, NULL, NULL, NULL, /* TODO: 24->16 */
 967     cvtSS2424C, cvtSM2424C, cvtMS2424C, cvtMM2424C,
 968 };
 969
 970 /***********************************************************************
 971  *           PCM_DriverDetails
 972  *
 973  */
 974 static  LRESULT PCM_DriverDetails(PACMDRIVERDETAILSW add)
 975 {
 976     TRACE("(%p)\n", add);
 977
 978     add->fccType = ACMDRIVERDETAILS_FCCTYPE_AUDIOCODEC;
 979     add->fccComp = ACMDRIVERDETAILS_FCCCOMP_UNDEFINED;
 980     add->wMid = MM_MICROSOFT;
 981     add->wPid = MM_MSFT_ACM_PCM;
 982     add->vdwACM = 0x01000000;
 983     add->vdwDriver = 0x01000000;
 984     add->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CONVERTER;
 985     add->cFormatTags = 1;
 986     add->cFilterTags = 0;
 987     add->hicon = NULL;
 988     MultiByteToWideChar( CP_ACP, 0, "MS-PCM", -1,
 989                          add->szShortName, sizeof(add->szShortName)/sizeof(WCHAR) );
 990     MultiByteToWideChar( CP_ACP, 0, "Wine PCM converter", -1,
 991                          add->szLongName, sizeof(add->szLongName)/sizeof(WCHAR) );
 992     MultiByteToWideChar( CP_ACP, 0, "Brought to you by the Wine team...", -1,
 993                          add->szCopyright, sizeof(add->szCopyright)/sizeof(WCHAR) );
 994     MultiByteToWideChar( CP_ACP, 0, "Refer to LICENSE file", -1,
 995                          add->szLicensing, sizeof(add->szLicensing)/sizeof(WCHAR) );
 996     add->szFeatures[0] = 0;
 997
 998     return MMSYSERR_NOERROR;
 999 }
1000
1001 /***********************************************************************
1002  *           PCM_FormatTagDetails
1003  *
1004  */
1005 static  LRESULT PCM_FormatTagDetails(PACMFORMATTAGDETAILSW aftd, DWORD dwQuery)
1006 {
1007     TRACE("(%p, %08x)\n", aftd, dwQuery);
1008
1009     switch (dwQuery) {
1010     case ACM_FORMATTAGDETAILSF_INDEX:
1011         if (aftd->dwFormatTagIndex != 0) {
1012             WARN("not possible\n");
1013             return ACMERR_NOTPOSSIBLE;
1014         }
1015         break;
1016     case ACM_FORMATTAGDETAILSF_FORMATTAG:
1017         if (aftd->dwFormatTag != WAVE_FORMAT_PCM) {
1018             WARN("not possible\n");
1019             return ACMERR_NOTPOSSIBLE;
1020         }
1021         break;
1022     case ACM_FORMATTAGDETAILSF_LARGESTSIZE:
1023         if (aftd->dwFormatTag != WAVE_FORMAT_UNKNOWN &&
1024             aftd->dwFormatTag != WAVE_FORMAT_PCM) {
1025             WARN("not possible\n");
1026             return ACMERR_NOTPOSSIBLE;
1027         }
1028         break;
1029     default:
1030         WARN("Unsupported query %08x\n", dwQuery);
1031         return MMSYSERR_NOTSUPPORTED;
1032     }
1033
1034     aftd->dwFormatTagIndex = 0;
1035     aftd->dwFormatTag = WAVE_FORMAT_PCM;
1036     aftd->cbFormatSize = sizeof(PCMWAVEFORMAT);
1037     aftd->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CONVERTER;
1038     aftd->cStandardFormats = NUM_PCM_FORMATS;
1039     aftd->szFormatTag[0] = 0;
1040
1041     return MMSYSERR_NOERROR;
1042 }
1043
1044 /***********************************************************************
1045  *           PCM_FormatDetails
1046  *
1047  */
1048 static  LRESULT PCM_FormatDetails(PACMFORMATDETAILSW afd, DWORD dwQuery)
1049 {
1050     TRACE("(%p, %08x)\n", afd, dwQuery);
1051
1052     switch (dwQuery) {
1053     case ACM_FORMATDETAILSF_FORMAT:
1054         if (PCM_GetFormatIndex(afd->pwfx) == 0xFFFFFFFF) {
1055             WARN("not possible\n");
1056             return ACMERR_NOTPOSSIBLE;
1057         }
1058         break;
1059     case ACM_FORMATDETAILSF_INDEX:
1060         assert(afd->dwFormatIndex < NUM_PCM_FORMATS);
1061         afd->pwfx->wFormatTag = WAVE_FORMAT_PCM;
1062         afd->pwfx->nChannels = PCM_Formats[afd->dwFormatIndex].nChannels;
1063         afd->pwfx->nSamplesPerSec = PCM_Formats[afd->dwFormatIndex].rate;
1064         afd->pwfx->wBitsPerSample = PCM_Formats[afd->dwFormatIndex].nBits;
1065         /* native MSACM uses a PCMWAVEFORMAT structure, so cbSize is not
1066          * accessible afd->pwfx->cbSize = 0;
1067          */
1068         afd->pwfx->nBlockAlign =
1069             (afd->pwfx->nChannels * afd->pwfx->wBitsPerSample) / 8;
1070         afd->pwfx->nAvgBytesPerSec =
1071             afd->pwfx->nSamplesPerSec * afd->pwfx->nBlockAlign;
1072         break;
1073     default:
1074         WARN("Unsupported query %08x\n", dwQuery);
1075         return MMSYSERR_NOTSUPPORTED;
1076     }
1077
1078     afd->dwFormatTag = WAVE_FORMAT_PCM;
1079     afd->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CONVERTER;
1080     afd->szFormat[0] = 0; /* let MSACM format this for us... */
1081     afd->cbwfx = sizeof(PCMWAVEFORMAT);
1082
1083     return MMSYSERR_NOERROR;
1084 }
1085
1086 /***********************************************************************
1087  *           PCM_FormatSuggest
1088  *
1089  */
1090 static  LRESULT PCM_FormatSuggest(PACMDRVFORMATSUGGEST adfs)
1091 {
1092     TRACE("(%p)\n", adfs);
1093
1094     /* some tests ... */
1095     if (adfs->cbwfxSrc < sizeof(PCMWAVEFORMAT) ||
1096         adfs->cbwfxDst < sizeof(PCMWAVEFORMAT) ||
1097         PCM_GetFormatIndex(adfs->pwfxSrc) == 0xFFFFFFFF) {
1098             WARN("not possible\n");
1099             return ACMERR_NOTPOSSIBLE;
1100     }
1101
1102     /* is no suggestion for destination, then copy source value */
1103     if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_NCHANNELS)) {
1104         adfs->pwfxDst->nChannels = adfs->pwfxSrc->nChannels;
1105     }
1106     if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_NSAMPLESPERSEC)) {
1107         adfs->pwfxDst->nSamplesPerSec = adfs->pwfxSrc->nSamplesPerSec;
1108     }
1109     if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_WBITSPERSAMPLE)) {
1110         adfs->pwfxDst->wBitsPerSample = adfs->pwfxSrc->wBitsPerSample;
1111     }
1112     if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_WFORMATTAG)) {
1113         if (adfs->pwfxSrc->wFormatTag != WAVE_FORMAT_PCM) {
1114             WARN("source format 0x%x not supported\n", adfs->pwfxSrc->wFormatTag);
1115             return ACMERR_NOTPOSSIBLE;
1116         }
1117         adfs->pwfxDst->wFormatTag = adfs->pwfxSrc->wFormatTag;
1118     } else {
1119         if (adfs->pwfxDst->wFormatTag != WAVE_FORMAT_PCM) {
1120             WARN("destination format 0x%x not supported\n", adfs->pwfxDst->wFormatTag);
1121             return ACMERR_NOTPOSSIBLE;
1122         }
1123     }
1124     /* check if result is ok */
1125     if (PCM_GetFormatIndex(adfs->pwfxDst) == 0xFFFFFFFF) {
1126         WARN("not possible\n");
1127         return ACMERR_NOTPOSSIBLE;
1128     }
1129
1130     /* recompute other values */
1131     adfs->pwfxDst->nBlockAlign = (adfs->pwfxDst->nChannels * adfs->pwfxDst->wBitsPerSample) / 8;
1132     adfs->pwfxDst->nAvgBytesPerSec = adfs->pwfxDst->nSamplesPerSec * adfs->pwfxDst->nBlockAlign;
1133
1134     return MMSYSERR_NOERROR;
1135 }
1136
1137 /***********************************************************************
1138  *           PCM_StreamOpen
1139  *
1140  */
1141 static  LRESULT PCM_StreamOpen(PACMDRVSTREAMINSTANCE adsi)
1142 {
1143     AcmPcmData* apd;
1144     int idx;
1145     DWORD flags;
1146
1147     TRACE("(%p)\n", adsi);
1148
1149     assert(!(adsi->fdwOpen & ACM_STREAMOPENF_ASYNC));
1150
1151     switch(adsi->pwfxSrc->wBitsPerSample){
1152     case 8:
1153         idx = 0;
1154         break;
1155     case 16:
1156         idx = 12;
1157         break;
1158     case 24:
1159         if (adsi->pwfxSrc->nBlockAlign != 3 * adsi->pwfxSrc->nChannels) {
1160             FIXME("Source: 24-bit samples must be packed\n");
1161             return MMSYSERR_NOTSUPPORTED;
1162         }
1163         idx = 24;
1164         break;
1165     default:
1166         FIXME("Unsupported source bit depth: %u\n", adsi->pwfxSrc->wBitsPerSample);
1167         return MMSYSERR_NOTSUPPORTED;
1168     }
1169
1170     switch(adsi->pwfxDst->wBitsPerSample){
1171     case 8:
1172         break;
1173     case 16:
1174         idx += 4;
1175         break;
1176     case 24:
1177         if (adsi->pwfxDst->nBlockAlign != 3 * adsi->pwfxDst->nChannels) {
1178             FIXME("Destination: 24-bit samples must be packed\n");
1179             return MMSYSERR_NOTSUPPORTED;
1180         }
1181         idx += 8;
1182         break;
1183     default:
1184         FIXME("Unsupported destination bit depth: %u\n", adsi->pwfxDst->wBitsPerSample);
1185         return MMSYSERR_NOTSUPPORTED;
1186     }
1187
1188     if (adsi->pwfxSrc->nChannels      == 1)  idx += 2;
1189
1190     if (adsi->pwfxDst->nChannels      == 1)  idx += 1;
1191
1192     apd = HeapAlloc(GetProcessHeap(), 0, sizeof(AcmPcmData));
1193     if (!apd)
1194         return MMSYSERR_NOMEM;
1195
1196     if (adsi->pwfxSrc->nSamplesPerSec == adsi->pwfxDst->nSamplesPerSec) {
1197         flags = 0;
1198         apd->cvt.cvtKeepRate = PCM_ConvertKeepRate[idx];
1199     } else {
1200         flags = PCM_RESAMPLE;
1201         apd->cvt.cvtChangeRate = PCM_ConvertChangeRate[idx];
1202     }
1203
1204     if(!apd->cvt.cvtChangeRate && !apd->cvt.cvtKeepRate){
1205         FIXME("Unimplemented conversion from %u -> %u bps\n",
1206             adsi->pwfxSrc->wBitsPerSample,
1207             adsi->pwfxDst->wBitsPerSample);
1208         HeapFree(GetProcessHeap(), 0, apd);
1209         return MMSYSERR_NOTSUPPORTED;
1210     }
1211
1212     adsi->dwDriver = (DWORD_PTR)apd;
1213     adsi->fdwDriver = flags;
1214
1215     return MMSYSERR_NOERROR;
1216 }
1217
1218 /***********************************************************************
1219  *           PCM_StreamClose
1220  *
1221  */
1222 static  LRESULT PCM_StreamClose(PACMDRVSTREAMINSTANCE adsi)
1223 {
1224     TRACE("(%p)\n", adsi);
1225
1226     HeapFree(GetProcessHeap(), 0, (void*)adsi->dwDriver);
1227     return MMSYSERR_NOERROR;
1228 }
1229
1230 /***********************************************************************
1231  *           PCM_round
1232  *
1233  */
1234 static  inline DWORD    PCM_round(DWORD a, DWORD b, DWORD c)
1235 {
1236     assert(c);
1237     /* to be sure, always return an entire number of c... */
1238     return ((double)a * (double)b + (double)c - 1) / (double)c;
1239 }
1240
1241 /***********************************************************************
1242  *           PCM_StreamSize
1243  *
1244  */
1245 static  LRESULT PCM_StreamSize(PACMDRVSTREAMINSTANCE adsi, PACMDRVSTREAMSIZE adss)
1246 {
1247     DWORD       srcMask = ~(adsi->pwfxSrc->nBlockAlign - 1);
1248     DWORD       dstMask = ~(adsi->pwfxDst->nBlockAlign - 1);
1249
1250     TRACE("(%p, %p)\n", adsi, adss);
1251
1252     switch (adss->fdwSize) {
1253     case ACM_STREAMSIZEF_DESTINATION:
1254         /* cbDstLength => cbSrcLength */
1255         adss->cbSrcLength = PCM_round(adss->cbDstLength & dstMask,
1256                                       adsi->pwfxSrc->nAvgBytesPerSec,
1257                                       adsi->pwfxDst->nAvgBytesPerSec) & srcMask;
1258         break;
1259     case ACM_STREAMSIZEF_SOURCE:
1260         /* cbSrcLength => cbDstLength */
1261         adss->cbDstLength =  PCM_round(adss->cbSrcLength & srcMask,
1262                                        adsi->pwfxDst->nAvgBytesPerSec,
1263                                        adsi->pwfxSrc->nAvgBytesPerSec) & dstMask;
1264         break;
1265     default:
1266         WARN("Unsupported query %08x\n", adss->fdwSize);
1267         return MMSYSERR_NOTSUPPORTED;
1268     }
1269     return MMSYSERR_NOERROR;
1270 }
1271
1272 /***********************************************************************
1273  *           PCM_StreamConvert
1274  *
1275  */
1276 static LRESULT PCM_StreamConvert(PACMDRVSTREAMINSTANCE adsi, PACMDRVSTREAMHEADER adsh)
1277 {
1278     AcmPcmData* apd = (AcmPcmData*)adsi->dwDriver;
1279     DWORD       nsrc = NUM_OF(adsh->cbSrcLength, adsi->pwfxSrc->nBlockAlign);
1280     DWORD       ndst = NUM_OF(adsh->cbDstLength, adsi->pwfxDst->nBlockAlign);
1281
1282     TRACE("(%p, %p)\n", adsi, adsh);
1283
1284     TRACE("nsrc=%d,adsh->cbSrcLength=%d\n", nsrc, adsh->cbSrcLength);
1285     TRACE("ndst=%d,adsh->cbDstLength=%d\n", ndst, adsh->cbDstLength);
1286     TRACE("src [wFormatTag=%u, nChannels=%u, nSamplesPerSec=%u, nAvgBytesPerSec=%u, nBlockAlign=%u, wBitsPerSample=%u, cbSize=%u]\n",
1287           adsi->pwfxSrc->wFormatTag, adsi->pwfxSrc->nChannels, adsi->pwfxSrc->nSamplesPerSec, adsi->pwfxSrc->nAvgBytesPerSec,
1288           adsi->pwfxSrc->nBlockAlign, adsi->pwfxSrc->wBitsPerSample, adsi->pwfxSrc->cbSize);
1289     TRACE("dst [wFormatTag=%u, nChannels=%u, nSamplesPerSec=%u, nAvgBytesPerSec=%u, nBlockAlign=%u, wBitsPerSample=%u, cbSize=%u]\n",
1290           adsi->pwfxDst->wFormatTag, adsi->pwfxDst->nChannels, adsi->pwfxDst->nSamplesPerSec, adsi->pwfxDst->nAvgBytesPerSec,
1291           adsi->pwfxDst->nBlockAlign, adsi->pwfxDst->wBitsPerSample, adsi->pwfxDst->cbSize);
1292
1293     if (adsh->fdwConvert &
1294         ~(ACM_STREAMCONVERTF_BLOCKALIGN|
1295           ACM_STREAMCONVERTF_END|
1296           ACM_STREAMCONVERTF_START)) {
1297         FIXME("Unsupported fdwConvert (%08x), ignoring it\n", adsh->fdwConvert);
1298     }
1299     /* ACM_STREAMCONVERTF_BLOCKALIGN
1300      *  currently all conversions are block aligned, so do nothing for this flag
1301      * ACM_STREAMCONVERTF_END
1302      *  no pending data, so do nothing for this flag
1303      */
1304     if ((adsh->fdwConvert & ACM_STREAMCONVERTF_START) &&
1305         (adsi->fdwDriver & PCM_RESAMPLE)) {
1306     }
1307
1308     /* do the job */
1309     if (adsi->fdwDriver & PCM_RESAMPLE) {
1310         apd->cvt.cvtChangeRate(adsi->pwfxSrc->nSamplesPerSec, adsh->pbSrc, &nsrc,
1311                                adsi->pwfxDst->nSamplesPerSec, adsh->pbDst, &ndst);
1312     } else {
1313         if (nsrc < ndst) ndst = nsrc; else nsrc = ndst;
1314
1315         /* nsrc is now equal to ndst */
1316         apd->cvt.cvtKeepRate(adsh->pbSrc, nsrc, adsh->pbDst);
1317     }
1318
1319     adsh->cbSrcLengthUsed = nsrc * adsi->pwfxSrc->nBlockAlign;
1320     adsh->cbDstLengthUsed = ndst * adsi->pwfxDst->nBlockAlign;
1321
1322     return MMSYSERR_NOERROR;
1323 }
1324
1325 /**************************************************************************
1326  *                      DriverProc (MSACM32.@)
1327  */
1328 LRESULT CALLBACK PCM_DriverProc(DWORD_PTR dwDevID, HDRVR hDriv, UINT wMsg,
1329                                        LPARAM dwParam1, LPARAM dwParam2)
1330 {
1331     TRACE("(%08lx %p %u %08lx %08lx);\n",
1332           dwDevID, hDriv, wMsg, dwParam1, dwParam2);
1333
1334     switch (wMsg) {
1335     case DRV_LOAD:              return 1;
1336     case DRV_FREE:              return 1;
1337     case DRV_OPEN:              return PCM_drvOpen((LPSTR)dwParam1, (PACMDRVOPENDESCW)dwParam2);
1338     case DRV_CLOSE:             return PCM_drvClose(dwDevID);
1339     case DRV_ENABLE:            return 1;
1340     case DRV_DISABLE:           return 1;
1341     case DRV_QUERYCONFIGURE:    return 1;
1342     case DRV_CONFIGURE:         MessageBoxA(0, "MSACM PCM filter !", "Wine Driver", MB_OK); return 1;
1343     case DRV_INSTALL:           return DRVCNF_RESTART;
1344     case DRV_REMOVE:            return DRVCNF_RESTART;
1345
1346     case ACMDM_DRIVER_NOTIFY:
1347         /* no caching from other ACM drivers is done so far */
1348         return MMSYSERR_NOERROR;
1349
1350     case ACMDM_DRIVER_DETAILS:
1351         return PCM_DriverDetails((PACMDRIVERDETAILSW)dwParam1);
1352
1353     case ACMDM_FORMATTAG_DETAILS:
1354         return PCM_FormatTagDetails((PACMFORMATTAGDETAILSW)dwParam1, dwParam2);
1355
1356     case ACMDM_FORMAT_DETAILS:
1357         return PCM_FormatDetails((PACMFORMATDETAILSW)dwParam1, dwParam2);
1358
1359     case ACMDM_FORMAT_SUGGEST:
1360         return PCM_FormatSuggest((PACMDRVFORMATSUGGEST)dwParam1);
1361
1362     case ACMDM_STREAM_OPEN:
1363         return PCM_StreamOpen((PACMDRVSTREAMINSTANCE)dwParam1);
1364
1365     case ACMDM_STREAM_CLOSE:
1366         return PCM_StreamClose((PACMDRVSTREAMINSTANCE)dwParam1);
1367
1368     case ACMDM_STREAM_SIZE:
1369         return PCM_StreamSize((PACMDRVSTREAMINSTANCE)dwParam1, (PACMDRVSTREAMSIZE)dwParam2);
1370
1371     case ACMDM_STREAM_CONVERT:
1372         return PCM_StreamConvert((PACMDRVSTREAMINSTANCE)dwParam1, (PACMDRVSTREAMHEADER)dwParam2);
1373
1374     case ACMDM_HARDWARE_WAVE_CAPS_INPUT:
1375     case ACMDM_HARDWARE_WAVE_CAPS_OUTPUT:
1376         /* this converter is not a hardware driver */
1377     case ACMDM_FILTERTAG_DETAILS:
1378     case ACMDM_FILTER_DETAILS:
1379         /* this converter is not a filter */
1380     case ACMDM_STREAM_RESET:
1381         /* only needed for asynchronous driver... we aren't, so just say it */
1382     case ACMDM_STREAM_PREPARE:
1383     case ACMDM_STREAM_UNPREPARE:
1384         /* nothing special to do here... so don't do anything */
1385         return MMSYSERR_NOTSUPPORTED;
1386
1387     default:
1388         return DefDriverProc(dwDevID, hDriv, wMsg, dwParam1, dwParam2);
1389     }
1390 }