dll/win32/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 "wineacm.h"
  30
  31 #include <assert.h>
  32
  33 /***********************************************************************
  34  *           PCM_drvOpen
  35  */
  36 static  DWORD   PCM_drvOpen(LPCSTR str, PACMDRVOPENDESCW adod)
  37 {
  38     TRACE("(%p, %p)\n", str, adod);
  39
  40     return (adod == NULL) ||
  41         (adod->fccType == ACMDRIVERDETAILS_FCCTYPE_AUDIOCODEC &&
  42          adod->fccComp == ACMDRIVERDETAILS_FCCCOMP_UNDEFINED);
  43 }
  44
  45 /***********************************************************************
  46  *           PCM_drvClose
  47  */
  48 static  DWORD   PCM_drvClose(DWORD dwDevID)
  49 {
  50     TRACE("(%d)\n", dwDevID);
  51
  52     return 1;
  53 }
  54
  55 #define NUM_PCM_FORMATS (sizeof(PCM_Formats) / sizeof(PCM_Formats[0]))
  56 #define NUM_OF(a,b)     ((a)/(b))
  57
  58 /* flags for fdwDriver */
  59 #define PCM_RESAMPLE    1
  60
  61 typedef void (*PCM_CONVERT_KEEP_RATE)(const unsigned char*, int, unsigned char*);
  62
  63 typedef void (*PCM_CONVERT_CHANGE_RATE)(const DWORD, const unsigned char*, DWORD*, const DWORD, unsigned char*, DWORD*);
  64
  65 /* data used while converting */
  66 typedef struct tagAcmPcmData {
  67     /* conversion routine, depending if rate conversion is required */
  68     union {
  69         PCM_CONVERT_KEEP_RATE cvtKeepRate;
  70         PCM_CONVERT_CHANGE_RATE cvtChangeRate;
  71     } cvt;
  72 } AcmPcmData;
  73
  74 /* table to list all supported formats... those are the basic ones. this
  75  * also helps given a unique index to each of the supported formats
  76  */
  77 static const struct {
  78     int         nChannels;
  79     int         nBits;
  80     int         rate;
  81 } PCM_Formats[] = {
  82     {1,  8,  8000}, {2,  8,  8000}, {1, 16,  8000}, {2, 16,  8000}, {1, 24,  8000}, {2, 24,  8000},
  83     {1,  8, 11025}, {2,  8, 11025}, {1, 16, 11025}, {2, 16, 11025}, {1, 24, 11025}, {2, 24, 11025},
  84     {1,  8, 22050}, {2,  8, 22050}, {1, 16, 22050}, {2, 16, 22050}, {1, 24, 22050}, {2, 24, 22050},
  85     {1,  8, 44100}, {2,  8, 44100}, {1, 16, 44100}, {2, 16, 44100}, {1, 24, 44100}, {2, 24, 44100},
  86     {1,  8, 48000}, {2,  8, 48000}, {1, 16, 48000}, {2, 16, 48000}, {1, 24, 48000}, {2, 24, 48000},
  87     {1,  8, 96000}, {2,  8, 96000}, {1, 16, 96000}, {2, 16, 96000}, {1, 24, 96000}, {2, 24, 96000},
  88 };
  89
  90 /***********************************************************************
  91  *           PCM_GetFormatIndex
  92  */
  93 static DWORD PCM_GetFormatIndex(LPWAVEFORMATEX wfx)
  94 {
  95     unsigned int i;
  96     TRACE("(%p)\n", wfx);
  97
  98     for (i = 0; i < NUM_PCM_FORMATS; i++) {
  99         if (wfx->nChannels == PCM_Formats[i].nChannels &&
 100             wfx->nSamplesPerSec == PCM_Formats[i].rate &&
 101             wfx->wBitsPerSample == PCM_Formats[i].nBits)
 102             return i;
 103     }
 104     return 0xFFFFFFFF;
 105 }
 106
 107 /* PCM Conversions:
 108  *
 109  * parameters:
 110  *      + 8 bit unsigned vs 16 bit signed
 111  *      + mono vs stereo (1 or 2 channels)
 112  *      + sampling rate (8.0, 11.025, 22.05, 44.1 kHz are defined, but algo
 113  *        shall work in all cases)
 114  *
 115  * mono => stereo: copy the same sample on Left & Right channels
 116  * stereo => mono: use the sum of Left & Right channels
 117  */
 118
 119 /***********************************************************************
 120  *           C816
 121  *
 122  * Converts a 8 bit sample to a 16 bit one
 123  */
 124 static inline short C816(unsigned char b)
 125 {
 126     return (b - 128) << 8;
 127 }
 128
 129 /***********************************************************************
 130  *           C168
 131  *
 132  * Converts a 16 bit sample to a 8 bit one (data loss !!)
 133  */
 134 static inline unsigned char C168(short s)
 135 {
 136     return HIBYTE(s) ^ (unsigned char)0x80;
 137 }
 138
 139 /***********************************************************************
 140  *           C248
 141  *
 142  * Converts a 24 bit sample to a 8 bit one (data loss !!)
 143  */
 144 static inline unsigned char C248(int s)
 145 {
 146     return HIBYTE(HIWORD(s)) ^ (unsigned char)0x80;
 147 }
 148
 149 /***********************************************************************
 150  *           C2416
 151  *
 152  * Converts a 24 bit sample to a 16 bit one (data loss !!)
 153  */
 154 static inline short C2416(int s)
 155 {
 156     return HIWORD(s);
 157 }
 158
 159 /***********************************************************************
 160  *           R16
 161  *
 162  * Read a 16 bit sample (correctly handles endianness)
 163  */
 164 static inline short  R16(const unsigned char* src)
 165 {
 166     return (short)((unsigned short)src[0] | ((unsigned short)src[1] << 8));
 167 }
 168
 169 /***********************************************************************
 170  *           R24
 171  *
 172  * Read a 24 bit sample (correctly handles endianness)
 173  * Note, to support signed arithmetic, the values are shifted high in the int
 174  * and low 8 bytes are unused.
 175  */
 176 static inline int R24(const unsigned char* src)
 177 {
 178     return ((int)src[0] | (int)src[1] << 8 | (int)src[2] << 16) << 8;
 179 }
 180
 181 /***********************************************************************
 182  *           W16
 183  *
 184  * Write a 16 bit sample (correctly handles endianness)
 185  */
 186 static inline void  W16(unsigned char* dst, short s)
 187 {
 188     dst[0] = LOBYTE(s);
 189     dst[1] = HIBYTE(s);
 190 }
 191
 192 /***********************************************************************
 193  *           W24
 194  *
 195  * Write a 24 bit sample (correctly handles endianness)
 196  */
 197 static inline void  W24(unsigned char* dst, int s)
 198 {
 199     dst[0] = HIBYTE(LOWORD(s));
 200     dst[1] = LOBYTE(HIWORD(s));
 201     dst[2] = HIBYTE(HIWORD(s));
 202 }
 203
 204 /***********************************************************************
 205  *           M24
 206  *
 207  * Convert the (l,r) 24 bit stereo sample into a 24 bit mono
 208  * (takes the sum of the two values)
 209  */
 210 static inline int M24(int l, int r)
 211 {
 212     LONGLONG sum = l + r;
 213
 214     /* clip sum to saturation */
 215     if (sum > 0x7fffff00)
 216         sum = 0x7fffff00;
 217     else if (sum < -0x7fffff00)
 218         sum = -0x7fffff00;
 219
 220     return sum;
 221 }
 222
 223 /***********************************************************************
 224  *           M16
 225  *
 226  * Convert the (l,r) 16 bit stereo sample into a 16 bit mono
 227  * (takes the sum of the two values)
 228  */
 229 static inline short M16(short l, short r)
 230 {
 231     int sum = l + r;
 232
 233     /* clip sum to saturation */
 234     if (sum > 32767)
 235         sum = 32767;
 236     else if (sum < -32768)
 237         sum = -32768;
 238
 239     return sum;
 240 }
 241
 242 /***********************************************************************
 243  *           M8
 244  *
 245  * Convert the (l,r) 8 bit stereo sample into a 8 bit mono
 246  * (takes the sum of the two values)
 247  */
 248 static inline unsigned char M8(unsigned char a, unsigned char b)
 249 {
 250     int l = a - 128;
 251     int r = b - 128;
 252     int sum = (l + r) + 128;
 253
 254     /* clip sum to saturation */
 255     if (sum > 0xff)
 256         sum = 0xff;
 257     else if (sum < 0)
 258         sum = 0;
 259
 260     return sum;
 261 }
 262
 263 /* the conversion routines without rate conversion are labelled cvt<X><Y><N><M>K
 264  * where :
 265  * <X> is the (M)ono/(S)tereo configuration of  input channel
 266  * <Y> is the (M)ono/(S)tereo configuration of output channel
 267  * <N> is the number of bits of  input channel (8 or 16)
 268  * <M> is the number of bits of output channel (8 or 16)
 269  *
 270  * in the parameters, ns is always the number of samples, so the size of input
 271  * buffer (resp output buffer) is ns * (<X> == 'Mono' ? 1:2) * (<N> == 8 ? 1:2)
 272  */
 273
 274 static  void cvtMM88K(const unsigned char* src, int ns, unsigned char* dst)
 275 {
 276     TRACE("(%p, %d, %p)\n", src, ns, dst);
 277     memcpy(dst, src, ns);
 278 }
 279
 280 static  void cvtSS88K(const unsigned char* src, int ns, unsigned char* dst)
 281 {
 282     TRACE("(%p, %d, %p)\n", src, ns, dst);
 283     memcpy(dst, src, ns * 2);
 284 }
 285
 286 static  void cvtMM1616K(const unsigned char* src, int ns, unsigned char* dst)
 287 {
 288     TRACE("(%p, %d, %p)\n", src, ns, dst);
 289     memcpy(dst, src, ns * 2);
 290 }
 291
 292 static  void cvtSS1616K(const unsigned char* src, int ns, unsigned char* dst)
 293 {
 294     TRACE("(%p, %d, %p)\n", src, ns, dst);
 295     memcpy(dst, src, ns * 4);
 296 }
 297
 298 static  void cvtMS88K(const unsigned char* src, int ns, unsigned char* dst)
 299 {
 300     TRACE("(%p, %d, %p)\n", src, ns, dst);
 301
 302     while (ns--) {
 303         *dst++ = *src;
 304         *dst++ = *src++;
 305     }
 306 }
 307
 308 static  void cvtMS816K(const unsigned char* src, int ns, unsigned char* dst)
 309 {
 310     short       v;
 311     TRACE("(%p, %d, %p)\n", src, ns, dst);
 312
 313     while (ns--) {
 314         v = C816(*src++);
 315         W16(dst, v);            dst += 2;
 316         W16(dst, v);            dst += 2;
 317     }
 318 }
 319
 320 static  void cvtMS168K(const unsigned char* src, int ns, unsigned char* dst)
 321 {
 322     unsigned char v;
 323     TRACE("(%p, %d, %p)\n", src, ns, dst);
 324
 325     while (ns--) {
 326         v = C168(R16(src));     src += 2;
 327         *dst++ = v;
 328         *dst++ = v;
 329     }
 330 }
 331
 332 static  void cvtMS1616K(const unsigned char* src, int ns, unsigned char* dst)
 333 {
 334     short       v;
 335     TRACE("(%p, %d, %p)\n", src, ns, dst);
 336
 337     while (ns--) {
 338         v = R16(src);           src += 2;
 339         W16(dst, v);            dst += 2;
 340         W16(dst, v);            dst += 2;
 341     }
 342 }
 343
 344 static  void cvtSM88K(const unsigned char* src, int ns, unsigned char* dst)
 345 {
 346     TRACE("(%p, %d, %p)\n", src, ns, dst);
 347
 348     while (ns--) {
 349         *dst++ = M8(src[0], src[1]);
 350         src += 2;
 351     }
 352 }
 353
 354 static  void cvtSM816K(const unsigned char* src, int ns, unsigned char* dst)
 355 {
 356     short       v;
 357     TRACE("(%p, %d, %p)\n", src, ns, dst);
 358
 359     while (ns--) {
 360         v = M16(C816(src[0]), C816(src[1]));
 361         src += 2;
 362         W16(dst, v);            dst += 2;
 363     }
 364 }
 365
 366 static  void cvtSM168K(const unsigned char* src, int ns, unsigned char* dst)
 367 {
 368     TRACE("(%p, %d, %p)\n", src, ns, dst);
 369
 370     while (ns--) {
 371         *dst++ = C168(M16(R16(src), R16(src + 2)));
 372         src += 4;
 373     }
 374 }
 375
 376 static  void cvtSM1616K(const unsigned char* src, int ns, unsigned char* dst)
 377 {
 378     TRACE("(%p, %d, %p)\n", src, ns, dst);
 379
 380     while (ns--) {
 381         W16(dst, M16(R16(src),R16(src+2)));     dst += 2;
 382         src += 4;
 383     }
 384 }
 385
 386 static  void cvtMM816K(const unsigned char* src, int ns, unsigned char* dst)
 387 {
 388     TRACE("(%p, %d, %p)\n", src, ns, dst);
 389
 390     while (ns--) {
 391         W16(dst, C816(*src++));         dst += 2;
 392     }
 393 }
 394
 395 static  void cvtSS816K(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, C816(*src++)); dst += 2;
 401         W16(dst, C816(*src++)); dst += 2;
 402     }
 403 }
 404
 405 static  void cvtMM168K(const unsigned char* src, int ns, unsigned char* dst)
 406 {
 407     TRACE("(%p, %d, %p)\n", src, ns, dst);
 408
 409     while (ns--) {
 410         *dst++ = C168(R16(src));        src += 2;
 411     }
 412 }
 413
 414 static  void cvtSS168K(const unsigned char* src, int ns, unsigned char* dst)
 415 {
 416     TRACE("(%p, %d, %p)\n", src, ns, dst);
 417
 418     while (ns--) {
 419         *dst++ = C168(R16(src));        src += 2;
 420         *dst++ = C168(R16(src));        src += 2;
 421     }
 422 }
 423
 424 static  void cvtMS248K(const unsigned char* src, int ns, unsigned char* dst)
 425 {
 426     unsigned char v;
 427     TRACE("(%p, %d, %p)\n", src, ns, dst);
 428
 429     while (ns--) {
 430         v = C248(R24(src));     src += 3;
 431         *dst++ = v;
 432         *dst++ = v;
 433     }
 434 }
 435
 436 static  void cvtSM248K(const unsigned char* src, int ns, unsigned char* dst)
 437 {
 438     TRACE("(%p, %d, %p)\n", src, ns, dst);
 439
 440     while (ns--) {
 441         *dst++ = C248(M24(R24(src), R24(src + 3)));
 442         src += 6;
 443     }
 444 }
 445
 446 static  void cvtMM248K(const unsigned char* src, int ns, unsigned char* dst)
 447 {
 448     TRACE("(%p, %d, %p)\n", src, ns, dst);
 449
 450     while (ns--) {
 451         *dst++ = C248(R24(src));        src += 3;
 452     }
 453 }
 454
 455 static  void cvtSS248K(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(R24(src));        src += 3;
 461         *dst++ = C248(R24(src));        src += 3;
 462     }
 463 }
 464
 465 static  void cvtMS2416K(const unsigned char* src, int ns, unsigned char* dst)
 466 {
 467     short v;
 468     TRACE("(%p, %d, %p)\n", src, ns, dst);
 469
 470     while (ns--) {
 471         v = C2416(R24(src));    src += 3;
 472         W16(dst, v);    dst += 2;
 473         W16(dst, v);    dst += 2;
 474     }
 475 }
 476
 477 static  void cvtSM2416K(const unsigned char* src, int ns, unsigned char* dst)
 478 {
 479     TRACE("(%p, %d, %p)\n", src, ns, dst);
 480
 481     while (ns--) {
 482         W16(dst, C2416(M24(R24(src), R24(src + 3))));
 483         dst += 2;
 484         src += 6;
 485     }
 486 }
 487
 488 static  void cvtMM2416K(const unsigned char* src, int ns, unsigned char* dst)
 489 {
 490     TRACE("(%p, %d, %p)\n", src, ns, dst);
 491
 492     while (ns--) {
 493         W16(dst, C2416(R24(src)));      dst += 2; src += 3;
 494     }
 495 }
 496
 497 static  void cvtSS2416K(const unsigned char* src, int ns, unsigned char* dst)
 498 {
 499     TRACE("(%p, %d, %p)\n", src, ns, dst);
 500
 501     while (ns--) {
 502         W16(dst, C2416(R24(src)));      dst += 2; src += 3;
 503         W16(dst, C2416(R24(src)));      dst += 2; src += 3;
 504     }
 505 }
 506
 507
 508 static const PCM_CONVERT_KEEP_RATE PCM_ConvertKeepRate[] = {
 509     cvtSS88K,   cvtSM88K,   cvtMS88K,   cvtMM88K,
 510     cvtSS816K,  cvtSM816K,  cvtMS816K,  cvtMM816K,
 511     NULL, NULL, NULL, NULL, /* TODO: 8->24 */
 512     cvtSS168K,  cvtSM168K,  cvtMS168K,  cvtMM168K,
 513     cvtSS1616K, cvtSM1616K, cvtMS1616K, cvtMM1616K,
 514     NULL, NULL, NULL, NULL, /* TODO: 16->24 */
 515     cvtSS248K, cvtSM248K, cvtMS248K, cvtMM248K,
 516     cvtSS2416K, cvtSM2416K, cvtMS2416K, cvtMM2416K,
 517     NULL, NULL, NULL, NULL, /* TODO: 24->24 */
 518 };
 519
 520 /* the conversion routines with rate conversion are labelled cvt<X><Y><N><M>C
 521  * where :
 522  * <X> is the (M)ono/(S)tereo configuration of  input channel
 523  * <Y> is the (M)ono/(S)tereo configuration of output channel
 524  * <N> is the number of bits of  input channel (8 or 16)
 525  * <M> is the number of bits of output channel (8 or 16)
 526  *
 527  */
 528
 529 static void cvtSS88C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
 530                      const DWORD dstRate, unsigned char *dst, DWORD *ndst)
 531 {
 532     DWORD error = srcRate / 2;
 533     DWORD maxSrc = *nsrc, maxDst = *ndst;
 534     *ndst = 0;
 535     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
 536         error += dstRate;
 537         while (error > srcRate) {
 538             if (*ndst == maxDst)
 539                 return;
 540             (*ndst)++;
 541             error -= srcRate;
 542
 543             *dst++ = src[0];
 544             *dst++ = src[1];
 545         }
 546         src += 2;
 547     }
 548 }
 549
 550 static void cvtSM88C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
 551                      const DWORD dstRate, unsigned char *dst, DWORD *ndst)
 552 {
 553     DWORD error = srcRate / 2;
 554     DWORD maxSrc = *nsrc, maxDst = *ndst;
 555     *ndst = 0;
 556     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
 557         error += dstRate;
 558         while (error > srcRate) {
 559             if (*ndst == maxDst)
 560                 return;
 561             (*ndst)++;
 562             error -= srcRate;
 563
 564             *dst++ = M8(src[0], src[1]);
 565         }
 566         src += 2;
 567     }
 568 }
 569
 570 static void cvtMS88C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
 571                      const DWORD dstRate, unsigned char *dst, DWORD *ndst)
 572 {
 573     DWORD error = srcRate / 2;
 574     DWORD maxSrc = *nsrc, maxDst = *ndst;
 575     *ndst = 0;
 576     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
 577         error += dstRate;
 578         while (error > srcRate) {
 579             if (*ndst == maxDst)
 580                 return;
 581             (*ndst)++;
 582             error -= srcRate;
 583
 584             *dst++ = src[0];
 585             *dst++ = src[0];
 586         }
 587         src += 1;
 588     }
 589 }
 590
 591 static void cvtMM88C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
 592                      const DWORD dstRate, unsigned char *dst, DWORD *ndst)
 593 {
 594     DWORD error = srcRate / 2;
 595     DWORD maxSrc = *nsrc, maxDst = *ndst;
 596     *ndst = 0;
 597     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
 598         error += dstRate;
 599         while (error > srcRate) {
 600             if (*ndst == maxDst)
 601                 return;
 602             (*ndst)++;
 603             error -= srcRate;
 604
 605             *dst++ = src[0];
 606         }
 607         src += 1;
 608     }
 609 }
 610
 611 static void cvtSS816C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
 612                       const DWORD dstRate, unsigned char *dst, DWORD *ndst)
 613 {
 614     DWORD error = srcRate / 2;
 615     DWORD maxSrc = *nsrc, maxDst = *ndst;
 616     *ndst = 0;
 617     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
 618         error += dstRate;
 619         while (error > srcRate) {
 620             if (*ndst == maxDst)
 621                 return;
 622             (*ndst)++;
 623             error -= srcRate;
 624
 625             W16(dst, C816(src[0])); dst += 2;
 626             W16(dst, C816(src[1])); dst += 2;
 627         }
 628         src += 2;
 629     }
 630 }
 631
 632 static void cvtSM816C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
 633                       const DWORD dstRate, unsigned char *dst, DWORD *ndst)
 634 {
 635     DWORD error = srcRate / 2;
 636     DWORD maxSrc = *nsrc, maxDst = *ndst;
 637     *ndst = 0;
 638     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
 639         error += dstRate;
 640         while (error > srcRate) {
 641             if (*ndst == maxDst)
 642                 return;
 643             (*ndst)++;
 644             error -= srcRate;
 645
 646             W16(dst, M16(C816(src[0]), C816(src[1]))); dst += 2;
 647         }
 648         src += 2;
 649     }
 650 }
 651
 652 static void cvtMS816C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
 653                       const DWORD dstRate, unsigned char *dst, DWORD *ndst)
 654 {
 655     DWORD error = srcRate / 2;
 656     DWORD maxSrc = *nsrc, maxDst = *ndst;
 657     *ndst = 0;
 658     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
 659         error += dstRate;
 660         while (error > srcRate) {
 661             if (*ndst == maxDst)
 662                 return;
 663             (*ndst)++;
 664             error -= srcRate;
 665
 666             W16(dst, C816(src[0])); dst += 2;
 667             W16(dst, C816(src[0])); dst += 2;
 668         }
 669         src += 1;
 670     }
 671 }
 672
 673 static void cvtMM816C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
 674                       const DWORD dstRate, unsigned char *dst, DWORD *ndst)
 675 {
 676     DWORD error = srcRate / 2;
 677     DWORD maxSrc = *nsrc, maxDst = *ndst;
 678     *ndst = 0;
 679     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
 680         error += dstRate;
 681         while (error > srcRate) {
 682             if (*ndst == maxDst)
 683                 return;
 684             (*ndst)++;
 685             error -= srcRate;
 686
 687             W16(dst, C816(src[0])); dst += 2;
 688         }
 689         src += 1;
 690     }
 691 }
 692
 693 static void cvtSS168C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
 694                       const DWORD dstRate, unsigned char *dst, DWORD *ndst)
 695 {
 696     DWORD error = srcRate / 2;
 697     DWORD maxSrc = *nsrc, maxDst = *ndst;
 698     *ndst = 0;
 699     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
 700         error += dstRate;
 701         while (error > srcRate) {
 702             if (*ndst == maxDst)
 703                 return;
 704             (*ndst)++;
 705             error -= srcRate;
 706
 707             *dst++ = C168(R16(src));
 708             *dst++ = C168(R16(src + 2));
 709         }
 710         src += 4;
 711     }
 712 }
 713
 714 static void cvtSM168C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
 715                       const DWORD dstRate, unsigned char *dst, DWORD *ndst)
 716 {
 717     DWORD error = srcRate / 2;
 718     DWORD maxSrc = *nsrc, maxDst = *ndst;
 719     *ndst = 0;
 720     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
 721         error += dstRate;
 722         while (error > srcRate) {
 723             if (*ndst == maxDst)
 724                 return;
 725             (*ndst)++;
 726             error -= srcRate;
 727
 728             *dst++ = C168(M16(R16(src), R16(src + 2)));
 729         }
 730         src += 4;
 731     }
 732 }
 733
 734 static void cvtMS168C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
 735                       const DWORD dstRate, unsigned char *dst, DWORD *ndst)
 736 {
 737     DWORD error = srcRate / 2;
 738     DWORD maxSrc = *nsrc, maxDst = *ndst;
 739     *ndst = 0;
 740     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
 741         error += dstRate;
 742         while (error > srcRate) {
 743             if (*ndst == maxDst)
 744                 return;
 745             (*ndst)++;
 746             error -= srcRate;
 747
 748             *dst++ = C168(R16(src));
 749             *dst++ = C168(R16(src));
 750         }
 751         src += 2;
 752     }
 753 }
 754
 755 static void cvtMM168C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
 756                       const DWORD dstRate, unsigned char *dst, DWORD *ndst)
 757 {
 758     DWORD error = srcRate / 2;
 759     DWORD maxSrc = *nsrc, maxDst = *ndst;
 760     *ndst = 0;
 761     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
 762         error += dstRate;
 763         while (error > srcRate) {
 764             if (*ndst == maxDst)
 765                 return;
 766             (*ndst)++;
 767             error -= srcRate;
 768
 769             *dst++ = C168(R16(src));
 770         }
 771         src += 2;
 772     }
 773 }
 774
 775 static void cvtSS1616C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
 776                        const DWORD dstRate, unsigned char *dst, DWORD *ndst)
 777 {
 778     DWORD error = srcRate / 2;
 779     DWORD maxSrc = *nsrc, maxDst = *ndst;
 780     *ndst = 0;
 781     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
 782         error += dstRate;
 783         while (error > srcRate) {
 784             if (*ndst == maxDst)
 785                 return;
 786             (*ndst)++;
 787             error -= srcRate;
 788
 789             W16(dst, R16(src)); dst += 2;
 790             W16(dst, R16(src + 2)); dst += 2;
 791         }
 792         src += 4;
 793     }
 794 }
 795
 796 static void cvtSM1616C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
 797                        const DWORD dstRate, unsigned char *dst, DWORD *ndst)
 798 {
 799     DWORD error = srcRate / 2;
 800     DWORD maxSrc = *nsrc, maxDst = *ndst;
 801     *ndst = 0;
 802     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
 803         error += dstRate;
 804         while (error > srcRate) {
 805             if (*ndst == maxDst)
 806                 return;
 807             (*ndst)++;
 808             error -= srcRate;
 809
 810             W16(dst, M16(R16(src), R16(src + 2))); dst += 2;
 811         }
 812         src += 4;
 813     }
 814 }
 815
 816 static void cvtMS1616C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
 817                        const DWORD dstRate, unsigned char *dst, DWORD *ndst)
 818 {
 819     DWORD error = srcRate / 2;
 820     DWORD maxSrc = *nsrc, maxDst = *ndst;
 821     *ndst = 0;
 822     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
 823         error += dstRate;
 824         while (error > srcRate) {
 825             if (*ndst == maxDst)
 826                 return;
 827             (*ndst)++;
 828             error -= srcRate;
 829
 830             W16(dst, R16(src)); dst += 2;
 831             W16(dst, R16(src)); dst += 2;
 832         }
 833         src += 2;
 834     }
 835 }
 836
 837 static void cvtMM1616C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
 838                        const DWORD dstRate, unsigned char *dst, DWORD *ndst)
 839 {
 840     DWORD error = srcRate / 2;
 841     DWORD maxSrc = *nsrc, maxDst = *ndst;
 842     *ndst = 0;
 843     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
 844         error += dstRate;
 845         while (error > srcRate) {
 846             if (*ndst == maxDst)
 847                 return;
 848             (*ndst)++;
 849             error -= srcRate;
 850
 851             W16(dst, R16(src)); dst += 2;
 852         }
 853         src += 2;
 854     }
 855 }
 856
 857 static void cvtSS2424C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
 858                        const DWORD dstRate, unsigned char *dst, DWORD *ndst)
 859 {
 860     DWORD error = srcRate / 2;
 861     DWORD maxSrc = *nsrc, maxDst = *ndst;
 862     *ndst = 0;
 863     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
 864         error += dstRate;
 865         while (error > srcRate) {
 866             if (*ndst == maxDst)
 867                 return;
 868             (*ndst)++;
 869             error -= srcRate;
 870
 871             W24(dst, R24(src)); dst += 3;
 872             W24(dst, R24(src + 3)); dst += 3;
 873         }
 874         src += 6;
 875     }
 876 }
 877
 878 static void cvtSM2424C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
 879                        const DWORD dstRate, unsigned char *dst, DWORD *ndst)
 880 {
 881     DWORD error = srcRate / 2;
 882     DWORD maxSrc = *nsrc, maxDst = *ndst;
 883     *ndst = 0;
 884     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
 885         error += dstRate;
 886         while (error > srcRate) {
 887             if (*ndst == maxDst)
 888                 return;
 889             (*ndst)++;
 890             error -= srcRate;
 891
 892             W24(dst, M24(R24(src), R24(src + 3))); dst += 3;
 893         }
 894         src += 6;
 895     }
 896 }
 897
 898 static void cvtMS2424C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
 899                        const DWORD dstRate, unsigned char *dst, DWORD *ndst)
 900 {
 901     DWORD error = srcRate / 2;
 902     DWORD maxSrc = *nsrc, maxDst = *ndst;
 903     *ndst = 0;
 904     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
 905         error += dstRate;
 906         while (error > srcRate) {
 907             if (*ndst == maxDst)
 908                 return;
 909             (*ndst)++;
 910             error -= srcRate;
 911
 912             W24(dst, R24(src)); dst += 3;
 913             W24(dst, R24(src)); dst += 3;
 914         }
 915         src += 3;
 916     }
 917 }
 918
 919 static void cvtMM2424C(const DWORD srcRate, const unsigned char *src, DWORD *nsrc,
 920                        const DWORD dstRate, unsigned char *dst, DWORD *ndst)
 921 {
 922     DWORD error = srcRate / 2;
 923     DWORD maxSrc = *nsrc, maxDst = *ndst;
 924     *ndst = 0;
 925     for (*nsrc = 0; *nsrc < maxSrc; (*nsrc)++) {
 926         error += dstRate;
 927         while (error > srcRate) {
 928             if (*ndst == maxDst)
 929                 return;
 930             (*ndst)++;
 931             error -= srcRate;
 932
 933             W24(dst, R24(src)); dst += 3;
 934         }
 935         src += 3;
 936     }
 937 }
 938
 939 static const PCM_CONVERT_CHANGE_RATE PCM_ConvertChangeRate[] = {
 940     cvtSS88C,   cvtSM88C,   cvtMS88C,   cvtMM88C,
 941     cvtSS816C,  cvtSM816C,  cvtMS816C,  cvtMM816C,
 942     NULL, NULL, NULL, NULL, /* TODO: 8->24 */
 943     cvtSS168C,  cvtSM168C,  cvtMS168C,  cvtMM168C,
 944     cvtSS1616C, cvtSM1616C, cvtMS1616C, cvtMM1616C,
 945     NULL, NULL, NULL, NULL, /* TODO: 16->24 */
 946     NULL, NULL, NULL, NULL, /* TODO: 24->8 */
 947     NULL, NULL, NULL, NULL, /* TODO: 24->16 */
 948     cvtSS2424C, cvtSM2424C, cvtMS2424C, cvtMM2424C,
 949 };
 950
 951 /***********************************************************************
 952  *           PCM_DriverDetails
 953  *
 954  */
 955 static  LRESULT PCM_DriverDetails(PACMDRIVERDETAILSW add)
 956 {
 957     TRACE("(%p)\n", add);
 958
 959     add->fccType = ACMDRIVERDETAILS_FCCTYPE_AUDIOCODEC;
 960     add->fccComp = ACMDRIVERDETAILS_FCCCOMP_UNDEFINED;
 961     add->wMid = MM_MICROSOFT;
 962     add->wPid = MM_MSFT_ACM_PCM;
 963     add->vdwACM = 0x01000000;
 964     add->vdwDriver = 0x01000000;
 965     add->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CONVERTER;
 966     add->cFormatTags = 1;
 967     add->cFilterTags = 0;
 968     add->hicon = NULL;
 969     MultiByteToWideChar( CP_ACP, 0, "MS-PCM", -1,
 970                          add->szShortName, sizeof(add->szShortName)/sizeof(WCHAR) );
 971     MultiByteToWideChar( CP_ACP, 0, "Wine PCM converter", -1,
 972                          add->szLongName, sizeof(add->szLongName)/sizeof(WCHAR) );
 973     MultiByteToWideChar( CP_ACP, 0, "Brought to you by the Wine team...", -1,
 974                          add->szCopyright, sizeof(add->szCopyright)/sizeof(WCHAR) );
 975     MultiByteToWideChar( CP_ACP, 0, "Refer to LICENSE file", -1,
 976                          add->szLicensing, sizeof(add->szLicensing)/sizeof(WCHAR) );
 977     add->szFeatures[0] = 0;
 978
 979     return MMSYSERR_NOERROR;
 980 }
 981
 982 /***********************************************************************
 983  *           PCM_FormatTagDetails
 984  *
 985  */
 986 static  LRESULT PCM_FormatTagDetails(PACMFORMATTAGDETAILSW aftd, DWORD dwQuery)
 987 {
 988     TRACE("(%p, %08x)\n", aftd, dwQuery);
 989
 990     switch (dwQuery) {
 991     case ACM_FORMATTAGDETAILSF_INDEX:
 992         if (aftd->dwFormatTagIndex != 0) {
 993             WARN("not possible\n");
 994             return ACMERR_NOTPOSSIBLE;
 995         }
 996         break;
 997     case ACM_FORMATTAGDETAILSF_FORMATTAG:
 998         if (aftd->dwFormatTag != WAVE_FORMAT_PCM) {
 999             WARN("not possible\n");
1000             return ACMERR_NOTPOSSIBLE;
1001         }
1002         break;
1003     case ACM_FORMATTAGDETAILSF_LARGESTSIZE:
1004         if (aftd->dwFormatTag != WAVE_FORMAT_UNKNOWN &&
1005             aftd->dwFormatTag != WAVE_FORMAT_PCM) {
1006             WARN("not possible\n");
1007             return ACMERR_NOTPOSSIBLE;
1008         }
1009         break;
1010     default:
1011         WARN("Unsupported query %08x\n", dwQuery);
1012         return MMSYSERR_NOTSUPPORTED;
1013     }
1014
1015     aftd->dwFormatTagIndex = 0;
1016     aftd->dwFormatTag = WAVE_FORMAT_PCM;
1017     aftd->cbFormatSize = sizeof(PCMWAVEFORMAT);
1018     aftd->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CONVERTER;
1019     aftd->cStandardFormats = NUM_PCM_FORMATS;
1020     aftd->szFormatTag[0] = 0;
1021
1022     return MMSYSERR_NOERROR;
1023 }
1024
1025 /***********************************************************************
1026  *           PCM_FormatDetails
1027  *
1028  */
1029 static  LRESULT PCM_FormatDetails(PACMFORMATDETAILSW afd, DWORD dwQuery)
1030 {
1031     TRACE("(%p, %08x)\n", afd, dwQuery);
1032
1033     switch (dwQuery) {
1034     case ACM_FORMATDETAILSF_FORMAT:
1035         if (PCM_GetFormatIndex(afd->pwfx) == 0xFFFFFFFF) {
1036             WARN("not possible\n");
1037             return ACMERR_NOTPOSSIBLE;
1038         }
1039         break;
1040     case ACM_FORMATDETAILSF_INDEX:
1041         assert(afd->dwFormatIndex < NUM_PCM_FORMATS);
1042         afd->pwfx->wFormatTag = WAVE_FORMAT_PCM;
1043         afd->pwfx->nChannels = PCM_Formats[afd->dwFormatIndex].nChannels;
1044         afd->pwfx->nSamplesPerSec = PCM_Formats[afd->dwFormatIndex].rate;
1045         afd->pwfx->wBitsPerSample = PCM_Formats[afd->dwFormatIndex].nBits;
1046         /* native MSACM uses a PCMWAVEFORMAT structure, so cbSize is not
1047          * accessible afd->pwfx->cbSize = 0;
1048          */
1049         afd->pwfx->nBlockAlign =
1050             (afd->pwfx->nChannels * afd->pwfx->wBitsPerSample) / 8;
1051         afd->pwfx->nAvgBytesPerSec =
1052             afd->pwfx->nSamplesPerSec * afd->pwfx->nBlockAlign;
1053         break;
1054     default:
1055         WARN("Unsupported query %08x\n", dwQuery);
1056         return MMSYSERR_NOTSUPPORTED;
1057     }
1058
1059     afd->dwFormatTag = WAVE_FORMAT_PCM;
1060     afd->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CONVERTER;
1061     afd->szFormat[0] = 0; /* let MSACM format this for us... */
1062     afd->cbwfx = sizeof(PCMWAVEFORMAT);
1063
1064     return MMSYSERR_NOERROR;
1065 }
1066
1067 /***********************************************************************
1068  *           PCM_FormatSuggest
1069  *
1070  */
1071 static  LRESULT PCM_FormatSuggest(PACMDRVFORMATSUGGEST adfs)
1072 {
1073     TRACE("(%p)\n", adfs);
1074
1075     /* some tests ... */
1076     if (adfs->cbwfxSrc < sizeof(PCMWAVEFORMAT) ||
1077         adfs->cbwfxDst < sizeof(PCMWAVEFORMAT) ||
1078         PCM_GetFormatIndex(adfs->pwfxSrc) == 0xFFFFFFFF) {
1079             WARN("not possible\n");
1080             return ACMERR_NOTPOSSIBLE;
1081     }
1082
1083     /* is no suggestion for destination, then copy source value */
1084     if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_NCHANNELS)) {
1085         adfs->pwfxDst->nChannels = adfs->pwfxSrc->nChannels;
1086     }
1087     if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_NSAMPLESPERSEC)) {
1088         adfs->pwfxDst->nSamplesPerSec = adfs->pwfxSrc->nSamplesPerSec;
1089     }
1090     if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_WBITSPERSAMPLE)) {
1091         adfs->pwfxDst->wBitsPerSample = adfs->pwfxSrc->wBitsPerSample;
1092     }
1093     if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_WFORMATTAG)) {
1094         if (adfs->pwfxSrc->wFormatTag != WAVE_FORMAT_PCM) {
1095             WARN("source format 0x%x not supported\n", adfs->pwfxSrc->wFormatTag);
1096             return ACMERR_NOTPOSSIBLE;
1097         }
1098         adfs->pwfxDst->wFormatTag = adfs->pwfxSrc->wFormatTag;
1099     } else {
1100         if (adfs->pwfxDst->wFormatTag != WAVE_FORMAT_PCM) {
1101             WARN("destination format 0x%x not supported\n", adfs->pwfxDst->wFormatTag);
1102             return ACMERR_NOTPOSSIBLE;
1103         }
1104     }
1105     /* check if result is ok */
1106     if (PCM_GetFormatIndex(adfs->pwfxDst) == 0xFFFFFFFF) {
1107         WARN("not possible\n");
1108         return ACMERR_NOTPOSSIBLE;
1109     }
1110
1111     /* recompute other values */
1112     adfs->pwfxDst->nBlockAlign = (adfs->pwfxDst->nChannels * adfs->pwfxDst->wBitsPerSample) / 8;
1113     adfs->pwfxDst->nAvgBytesPerSec = adfs->pwfxDst->nSamplesPerSec * adfs->pwfxDst->nBlockAlign;
1114
1115     return MMSYSERR_NOERROR;
1116 }
1117
1118 /***********************************************************************
1119  *           PCM_StreamOpen
1120  *
1121  */
1122 static  LRESULT PCM_StreamOpen(PACMDRVSTREAMINSTANCE adsi)
1123 {
1124     AcmPcmData* apd;
1125     int idx;
1126     DWORD flags;
1127
1128     TRACE("(%p)\n", adsi);
1129
1130     assert(!(adsi->fdwOpen & ACM_STREAMOPENF_ASYNC));
1131
1132     switch(adsi->pwfxSrc->wBitsPerSample){
1133     case 8:
1134         idx = 0;
1135         break;
1136     case 16:
1137         idx = 12;
1138         break;
1139     case 24:
1140         if (adsi->pwfxSrc->nBlockAlign != 3 * adsi->pwfxSrc->nChannels) {
1141             FIXME("Source: 24-bit samples must be packed\n");
1142             return MMSYSERR_NOTSUPPORTED;
1143         }
1144         idx = 24;
1145         break;
1146     default:
1147         FIXME("Unsupported source bit depth: %u\n", adsi->pwfxSrc->wBitsPerSample);
1148         return MMSYSERR_NOTSUPPORTED;
1149     }
1150
1151     switch(adsi->pwfxDst->wBitsPerSample){
1152     case 8:
1153         break;
1154     case 16:
1155         idx += 4;
1156         break;
1157     case 24:
1158         if (adsi->pwfxDst->nBlockAlign != 3 * adsi->pwfxDst->nChannels) {
1159             FIXME("Destination: 24-bit samples must be packed\n");
1160             return MMSYSERR_NOTSUPPORTED;
1161         }
1162         idx += 8;
1163         break;
1164     default:
1165         FIXME("Unsupported destination bit depth: %u\n", adsi->pwfxDst->wBitsPerSample);
1166         return MMSYSERR_NOTSUPPORTED;
1167     }
1168
1169     if (adsi->pwfxSrc->nChannels      == 1)  idx += 2;
1170
1171     if (adsi->pwfxDst->nChannels      == 1)  idx += 1;
1172
1173     apd = HeapAlloc(GetProcessHeap(), 0, sizeof(AcmPcmData));
1174     if (!apd)
1175         return MMSYSERR_NOMEM;
1176
1177     if (adsi->pwfxSrc->nSamplesPerSec == adsi->pwfxDst->nSamplesPerSec) {
1178         flags = 0;
1179         apd->cvt.cvtKeepRate = PCM_ConvertKeepRate[idx];
1180     } else {
1181         flags = PCM_RESAMPLE;
1182         apd->cvt.cvtChangeRate = PCM_ConvertChangeRate[idx];
1183     }
1184
1185     if(!apd->cvt.cvtChangeRate && !apd->cvt.cvtKeepRate){
1186         FIXME("Unimplemented conversion from %u -> %u bps\n",
1187             adsi->pwfxSrc->wBitsPerSample,
1188             adsi->pwfxDst->wBitsPerSample);
1189         HeapFree(GetProcessHeap(), 0, apd);
1190         return MMSYSERR_NOTSUPPORTED;
1191     }
1192
1193     adsi->dwDriver = (DWORD_PTR)apd;
1194     adsi->fdwDriver = flags;
1195
1196     return MMSYSERR_NOERROR;
1197 }
1198
1199 /***********************************************************************
1200  *           PCM_StreamClose
1201  *
1202  */
1203 static  LRESULT PCM_StreamClose(PACMDRVSTREAMINSTANCE adsi)
1204 {
1205     TRACE("(%p)\n", adsi);
1206
1207     HeapFree(GetProcessHeap(), 0, (void*)adsi->dwDriver);
1208     return MMSYSERR_NOERROR;
1209 }
1210
1211 /***********************************************************************
1212  *           PCM_round
1213  *
1214  */
1215 static  inline DWORD    PCM_round(DWORD a, DWORD b, DWORD c)
1216 {
1217     assert(c);
1218     /* to be sure, always return an entire number of c... */
1219     return ((double)a * (double)b + (double)c - 1) / (double)c;
1220 }
1221
1222 /***********************************************************************
1223  *           PCM_StreamSize
1224  *
1225  */
1226 static  LRESULT PCM_StreamSize(PACMDRVSTREAMINSTANCE adsi, PACMDRVSTREAMSIZE adss)
1227 {
1228     DWORD       srcMask = ~(adsi->pwfxSrc->nBlockAlign - 1);
1229     DWORD       dstMask = ~(adsi->pwfxDst->nBlockAlign - 1);
1230
1231     TRACE("(%p, %p)\n", adsi, adss);
1232
1233     switch (adss->fdwSize) {
1234     case ACM_STREAMSIZEF_DESTINATION:
1235         /* cbDstLength => cbSrcLength */
1236         adss->cbSrcLength = PCM_round(adss->cbDstLength & dstMask,
1237                                       adsi->pwfxSrc->nAvgBytesPerSec,
1238                                       adsi->pwfxDst->nAvgBytesPerSec) & srcMask;
1239         break;
1240     case ACM_STREAMSIZEF_SOURCE:
1241         /* cbSrcLength => cbDstLength */
1242         adss->cbDstLength =  PCM_round(adss->cbSrcLength & srcMask,
1243                                        adsi->pwfxDst->nAvgBytesPerSec,
1244                                        adsi->pwfxSrc->nAvgBytesPerSec) & dstMask;
1245         break;
1246     default:
1247         WARN("Unsupported query %08x\n", adss->fdwSize);
1248         return MMSYSERR_NOTSUPPORTED;
1249     }
1250     return MMSYSERR_NOERROR;
1251 }
1252
1253 /***********************************************************************
1254  *           PCM_StreamConvert
1255  *
1256  */
1257 static LRESULT PCM_StreamConvert(PACMDRVSTREAMINSTANCE adsi, PACMDRVSTREAMHEADER adsh)
1258 {
1259     AcmPcmData* apd = (AcmPcmData*)adsi->dwDriver;
1260     DWORD       nsrc = NUM_OF(adsh->cbSrcLength, adsi->pwfxSrc->nBlockAlign);
1261     DWORD       ndst = NUM_OF(adsh->cbDstLength, adsi->pwfxDst->nBlockAlign);
1262
1263     TRACE("(%p, %p)\n", adsi, adsh);
1264
1265     TRACE("nsrc=%d,adsh->cbSrcLength=%d\n", nsrc, adsh->cbSrcLength);
1266     TRACE("ndst=%d,adsh->cbDstLength=%d\n", ndst, adsh->cbDstLength);
1267     TRACE("src [wFormatTag=%u, nChannels=%u, nSamplesPerSec=%u, nAvgBytesPerSec=%u, nBlockAlign=%u, wBitsPerSample=%u, cbSize=%u]\n",
1268           adsi->pwfxSrc->wFormatTag, adsi->pwfxSrc->nChannels, adsi->pwfxSrc->nSamplesPerSec, adsi->pwfxSrc->nAvgBytesPerSec,
1269           adsi->pwfxSrc->nBlockAlign, adsi->pwfxSrc->wBitsPerSample, adsi->pwfxSrc->cbSize);
1270     TRACE("dst [wFormatTag=%u, nChannels=%u, nSamplesPerSec=%u, nAvgBytesPerSec=%u, nBlockAlign=%u, wBitsPerSample=%u, cbSize=%u]\n",
1271           adsi->pwfxDst->wFormatTag, adsi->pwfxDst->nChannels, adsi->pwfxDst->nSamplesPerSec, adsi->pwfxDst->nAvgBytesPerSec,
1272           adsi->pwfxDst->nBlockAlign, adsi->pwfxDst->wBitsPerSample, adsi->pwfxDst->cbSize);
1273
1274     if (adsh->fdwConvert &
1275         ~(ACM_STREAMCONVERTF_BLOCKALIGN|
1276           ACM_STREAMCONVERTF_END|
1277           ACM_STREAMCONVERTF_START)) {
1278         FIXME("Unsupported fdwConvert (%08x), ignoring it\n", adsh->fdwConvert);
1279     }
1280     /* ACM_STREAMCONVERTF_BLOCKALIGN
1281      *  currently all conversions are block aligned, so do nothing for this flag
1282      * ACM_STREAMCONVERTF_END
1283      *  no pending data, so do nothing for this flag
1284      */
1285     if ((adsh->fdwConvert & ACM_STREAMCONVERTF_START) &&
1286         (adsi->fdwDriver & PCM_RESAMPLE)) {
1287     }
1288
1289     /* do the job */
1290     if (adsi->fdwDriver & PCM_RESAMPLE) {
1291         apd->cvt.cvtChangeRate(adsi->pwfxSrc->nSamplesPerSec, adsh->pbSrc, &nsrc,
1292                                adsi->pwfxDst->nSamplesPerSec, adsh->pbDst, &ndst);
1293     } else {
1294         if (nsrc < ndst) ndst = nsrc; else nsrc = ndst;
1295
1296         /* nsrc is now equal to ndst */
1297         apd->cvt.cvtKeepRate(adsh->pbSrc, nsrc, adsh->pbDst);
1298     }
1299
1300     adsh->cbSrcLengthUsed = nsrc * adsi->pwfxSrc->nBlockAlign;
1301     adsh->cbDstLengthUsed = ndst * adsi->pwfxDst->nBlockAlign;
1302
1303     return MMSYSERR_NOERROR;
1304 }
1305
1306 /**************************************************************************
1307  *                      DriverProc (MSACM32.@)
1308  */
1309 LRESULT CALLBACK PCM_DriverProc(DWORD_PTR dwDevID, HDRVR hDriv, UINT wMsg,
1310                                        LPARAM dwParam1, LPARAM dwParam2)
1311 {
1312     TRACE("(%08lx %p %u %08lx %08lx);\n",
1313           dwDevID, hDriv, wMsg, dwParam1, dwParam2);
1314
1315     switch (wMsg) {
1316     case DRV_LOAD:              return 1;
1317     case DRV_FREE:              return 1;
1318     case DRV_OPEN:              return PCM_drvOpen((LPSTR)dwParam1, (PACMDRVOPENDESCW)dwParam2);
1319     case DRV_CLOSE:             return PCM_drvClose(dwDevID);
1320     case DRV_ENABLE:            return 1;
1321     case DRV_DISABLE:           return 1;
1322     case DRV_QUERYCONFIGURE:    return 1;
1323     case DRV_CONFIGURE:         MessageBoxA(0, "MSACM PCM filter !", "Wine Driver", MB_OK); return 1;
1324     case DRV_INSTALL:           return DRVCNF_RESTART;
1325     case DRV_REMOVE:            return DRVCNF_RESTART;
1326
1327     case ACMDM_DRIVER_NOTIFY:
1328         /* no caching from other ACM drivers is done so far */
1329         return MMSYSERR_NOERROR;
1330
1331     case ACMDM_DRIVER_DETAILS:
1332         return PCM_DriverDetails((PACMDRIVERDETAILSW)dwParam1);
1333
1334     case ACMDM_FORMATTAG_DETAILS:
1335         return PCM_FormatTagDetails((PACMFORMATTAGDETAILSW)dwParam1, dwParam2);
1336
1337     case ACMDM_FORMAT_DETAILS:
1338         return PCM_FormatDetails((PACMFORMATDETAILSW)dwParam1, dwParam2);
1339
1340     case ACMDM_FORMAT_SUGGEST:
1341         return PCM_FormatSuggest((PACMDRVFORMATSUGGEST)dwParam1);
1342
1343     case ACMDM_STREAM_OPEN:
1344         return PCM_StreamOpen((PACMDRVSTREAMINSTANCE)dwParam1);
1345
1346     case ACMDM_STREAM_CLOSE:
1347         return PCM_StreamClose((PACMDRVSTREAMINSTANCE)dwParam1);
1348
1349     case ACMDM_STREAM_SIZE:
1350         return PCM_StreamSize((PACMDRVSTREAMINSTANCE)dwParam1, (PACMDRVSTREAMSIZE)dwParam2);
1351
1352     case ACMDM_STREAM_CONVERT:
1353         return PCM_StreamConvert((PACMDRVSTREAMINSTANCE)dwParam1, (PACMDRVSTREAMHEADER)dwParam2);
1354
1355     case ACMDM_HARDWARE_WAVE_CAPS_INPUT:
1356     case ACMDM_HARDWARE_WAVE_CAPS_OUTPUT:
1357         /* this converter is not a hardware driver */
1358     case ACMDM_FILTERTAG_DETAILS:
1359     case ACMDM_FILTER_DETAILS:
1360         /* this converter is not a filter */
1361     case ACMDM_STREAM_RESET:
1362         /* only needed for asynchronous driver... we aren't, so just say it */
1363     case ACMDM_STREAM_PREPARE:
1364     case ACMDM_STREAM_UNPREPARE:
1365         /* nothing special to do here... so don't do anything */
1366         return MMSYSERR_NOTSUPPORTED;
1367
1368     default:
1369         return DefDriverProc(dwDevID, hDriv, wMsg, dwParam1, dwParam2);
1370     }
1371 }