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 /* data used while converting */
  81 typedef struct tagAcmPcmData {
  82     /* conversion routine, depending if rate conversion is required */
  83     union {
  84         void (*cvtKeepRate)(const unsigned char*, int, unsigned char*);
  85         void (*cvtChangeRate)(DWORD, const unsigned char*, LPDWORD,
  86                               DWORD, unsigned char*, LPDWORD);
  87     } cvt;
  88 } AcmPcmData;
  89
  90 /* table to list all supported formats... those are the basic ones. this
  91  * also helps given a unique index to each of the supported formats
  92  */
  93 static const struct {
  94     int         nChannels;
  95     int         nBits;
  96     int         rate;
  97 } PCM_Formats[] = {
  98     {1,  8,  8000}, {2,  8,  8000}, {1, 16,  8000}, {2, 16,  8000},
  99     {1,  8, 11025}, {2,  8, 11025}, {1, 16, 11025}, {2, 16, 11025},
 100     {1,  8, 22050}, {2,  8, 22050}, {1, 16, 22050}, {2, 16, 22050},
 101     {1,  8, 44100}, {2,  8, 44100}, {1, 16, 44100}, {2, 16, 44100},
 102     {1,  8, 48000}, {2,  8, 48000}, {1, 16, 48000}, {2, 16, 48000},
 103     {1,  8, 96000}, {2,  8, 96000}, {1, 16, 96000}, {2, 16, 96000}
 104 };
 105
 106 /***********************************************************************
 107  *           PCM_GetFormatIndex
 108  */
 109 static DWORD PCM_GetFormatIndex(LPWAVEFORMATEX wfx)
 110 {
 111     unsigned int i;
 112     TRACE("(%p)\n", wfx);
 113
 114     for (i = 0; i < NUM_PCM_FORMATS; i++) {
 115         if (wfx->nChannels == PCM_Formats[i].nChannels &&
 116             wfx->nSamplesPerSec == PCM_Formats[i].rate &&
 117             wfx->wBitsPerSample == PCM_Formats[i].nBits)
 118             return i;
 119     }
 120     return 0xFFFFFFFF;
 121 }
 122
 123 /* PCM Conversions:
 124  *
 125  * parameters:
 126  *      + 8 bit unsigned vs 16 bit signed
 127  *      + mono vs stereo (1 or 2 channels)
 128  *      + sampling rate (8.0, 11.025, 22.05, 44.1 kHz are defined, but algo
 129  *        shall work in all cases)
 130  *
 131  * mono => stereo: copy the same sample on Left & Right channels
 132  * stereo => mono: use the sum of Left & Right channels
 133  */
 134
 135 /***********************************************************************
 136  *           C816
 137  *
 138  * Converts a 8 bit sample to a 16 bit one
 139  */
 140 static inline short C816(unsigned char b)
 141 {
 142     return (b - 128) << 8;
 143 }
 144
 145 /***********************************************************************
 146  *           C168
 147  *
 148  * Converts a 16 bit sample to a 8 bit one (data loss !!)
 149  */
 150 static inline unsigned char C168(short s)
 151 {
 152     return HIBYTE(s) ^ (unsigned char)0x80;
 153 }
 154
 155 /***********************************************************************
 156  *           R16
 157  *
 158  * Read a 16 bit sample (correctly handles endianess)
 159  */
 160 static inline short  R16(const unsigned char* src)
 161 {
 162     return (short)((unsigned short)src[0] | ((unsigned short)src[1] << 8));
 163 }
 164
 165 /***********************************************************************
 166  *           W16
 167  *
 168  * Write a 16 bit sample (correctly handles endianess)
 169  */
 170 static inline void  W16(unsigned char* dst, short s)
 171 {
 172     dst[0] = LOBYTE(s);
 173     dst[1] = HIBYTE(s);
 174 }
 175
 176 /***********************************************************************
 177  *           M16
 178  *
 179  * Convert the (l,r) 16 bit stereo sample into a 16 bit mono
 180  * (takes the sum of the two values)
 181  */
 182 static inline short M16(short l, short r)
 183 {
 184     int sum = l + r;
 185
 186     /* clip sum to saturation */
 187     if (sum > 32767)
 188         sum = 32767;
 189     else if (sum < -32768)
 190         sum = -32768;
 191
 192     return sum;
 193 }
 194
 195 /***********************************************************************
 196  *           M8
 197  *
 198  * Convert the (l,r) 8 bit stereo sample into a 8 bit mono
 199  * (takes the sum of the two values)
 200  */
 201 static inline unsigned char M8(unsigned char a, unsigned char b)
 202 {
 203     int l = a - 128;
 204     int r = b - 128;
 205     int sum = (l + r) + 128;
 206
 207     /* clip sum to saturation */
 208     if (sum > 0xff)
 209         sum = 0xff;
 210     else if (sum < 0)
 211         sum = 0;
 212
 213     return sum;
 214 }
 215
 216 /* the conversion routines without rate conversion are labelled cvt<X><Y><N><M>K
 217  * where :
 218  * <X> is the (M)ono/(S)tereo configuration of  input channel
 219  * <Y> is the (M)ono/(S)tereo configuration of output channel
 220  * <N> is the number of bits of  input channel (8 or 16)
 221  * <M> is the number of bits of output channel (8 or 16)
 222  *
 223  * in the parameters, ns is always the number of samples, so the size of input
 224  * buffer (resp output buffer) is ns * (<X> == 'Mono' ? 1:2) * (<N> == 8 ? 1:2)
 225  */
 226
 227 static  void cvtMM88K(const unsigned char* src, int ns, unsigned char* dst)
 228 {
 229     TRACE("(%p, %d, %p)\n", src, ns, dst);
 230     memcpy(dst, src, ns);
 231 }
 232
 233 static  void cvtSS88K(const unsigned char* src, int ns, unsigned char* dst)
 234 {
 235     TRACE("(%p, %d, %p)\n", src, ns, dst);
 236     memcpy(dst, src, ns * 2);
 237 }
 238
 239 static  void cvtMM1616K(const unsigned char* src, int ns, unsigned char* dst)
 240 {
 241     TRACE("(%p, %d, %p)\n", src, ns, dst);
 242     memcpy(dst, src, ns * 2);
 243 }
 244
 245 static  void cvtSS1616K(const unsigned char* src, int ns, unsigned char* dst)
 246 {
 247     TRACE("(%p, %d, %p)\n", src, ns, dst);
 248     memcpy(dst, src, ns * 4);
 249 }
 250
 251 static  void cvtMS88K(const unsigned char* src, int ns, unsigned char* dst)
 252 {
 253     TRACE("(%p, %d, %p)\n", src, ns, dst);
 254
 255     while (ns--) {
 256         *dst++ = *src;
 257         *dst++ = *src++;
 258     }
 259 }
 260
 261 static  void cvtMS816K(const unsigned char* src, int ns, unsigned char* dst)
 262 {
 263     short       v;
 264     TRACE("(%p, %d, %p)\n", src, ns, dst);
 265
 266     while (ns--) {
 267         v = C816(*src++);
 268         W16(dst, v);            dst += 2;
 269         W16(dst, v);            dst += 2;
 270     }
 271 }
 272
 273 static  void cvtMS168K(const unsigned char* src, int ns, unsigned char* dst)
 274 {
 275     unsigned char v;
 276     TRACE("(%p, %d, %p)\n", src, ns, dst);
 277
 278     while (ns--) {
 279         v = C168(R16(src));     src += 2;
 280         *dst++ = v;
 281         *dst++ = v;
 282     }
 283 }
 284
 285 static  void cvtMS1616K(const unsigned char* src, int ns, unsigned char* dst)
 286 {
 287     short       v;
 288     TRACE("(%p, %d, %p)\n", src, ns, dst);
 289
 290     while (ns--) {
 291         v = R16(src);           src += 2;
 292         W16(dst, v);            dst += 2;
 293         W16(dst, v);            dst += 2;
 294     }
 295 }
 296
 297 static  void cvtSM88K(const unsigned char* src, int ns, unsigned char* dst)
 298 {
 299     TRACE("(%p, %d, %p)\n", src, ns, dst);
 300
 301     while (ns--) {
 302         *dst++ = M8(src[0], src[1]);
 303         src += 2;
 304     }
 305 }
 306
 307 static  void cvtSM816K(const unsigned char* src, int ns, unsigned char* dst)
 308 {
 309     short       v;
 310     TRACE("(%p, %d, %p)\n", src, ns, dst);
 311
 312     while (ns--) {
 313         v = M16(C816(src[0]), C816(src[1]));
 314         src += 2;
 315         W16(dst, v);            dst += 2;
 316     }
 317 }
 318
 319 static  void cvtSM168K(const unsigned char* src, int ns, unsigned char* dst)
 320 {
 321     TRACE("(%p, %d, %p)\n", src, ns, dst);
 322
 323     while (ns--) {
 324         *dst++ = C168(M16(R16(src), R16(src + 2)));
 325         src += 4;
 326     }
 327 }
 328
 329 static  void cvtSM1616K(const unsigned char* src, int ns, unsigned char* dst)
 330 {
 331     TRACE("(%p, %d, %p)\n", src, ns, dst);
 332
 333     while (ns--) {
 334         W16(dst, M16(R16(src),R16(src+2)));     dst += 2;
 335         src += 4;
 336     }
 337 }
 338
 339 static  void cvtMM816K(const unsigned char* src, int ns, unsigned char* dst)
 340 {
 341     TRACE("(%p, %d, %p)\n", src, ns, dst);
 342
 343     while (ns--) {
 344         W16(dst, C816(*src++));         dst += 2;
 345     }
 346 }
 347
 348 static  void cvtSS816K(const unsigned char* src, int ns, unsigned char* dst)
 349 {
 350     TRACE("(%p, %d, %p)\n", src, ns, dst);
 351
 352     while (ns--) {
 353         W16(dst, C816(*src++)); dst += 2;
 354         W16(dst, C816(*src++)); dst += 2;
 355     }
 356 }
 357
 358 static  void cvtMM168K(const unsigned char* src, int ns, unsigned char* dst)
 359 {
 360     TRACE("(%p, %d, %p)\n", src, ns, dst);
 361
 362     while (ns--) {
 363         *dst++ = C168(R16(src));        src += 2;
 364     }
 365 }
 366
 367 static  void cvtSS168K(const unsigned char* src, int ns, unsigned char* dst)
 368 {
 369     TRACE("(%p, %d, %p)\n", src, ns, dst);
 370
 371     while (ns--) {
 372         *dst++ = C168(R16(src));        src += 2;
 373         *dst++ = C168(R16(src));        src += 2;
 374     }
 375 }
 376
 377
 378 typedef void (*PCM_CONVERT_KEEP_RATE)(const unsigned char*, int, unsigned char*);
 379
 380 static const PCM_CONVERT_KEEP_RATE PCM_ConvertKeepRate[16] = {
 381     cvtSS88K,   cvtSM88K,   cvtMS88K,   cvtMM88K,
 382     cvtSS816K,  cvtSM816K,  cvtMS816K,  cvtMM816K,
 383     cvtSS168K,  cvtSM168K,  cvtMS168K,  cvtMM168K,
 384     cvtSS1616K, cvtSM1616K, cvtMS1616K, cvtMM1616K,
 385 };
 386
 387 /* the conversion routines with rate conversion are labelled cvt<X><Y><N><M>C
 388  * where :
 389  * <X> is the (M)ono/(S)tereo configuration of  input channel
 390  * <Y> is the (M)ono/(S)tereo configuration of output channel
 391  * <N> is the number of bits of  input channel (8 or 16)
 392  * <M> is the number of bits of output channel (8 or 16)
 393  *
 394  */
 395 static  void cvtSS88C(DWORD srcRate, const unsigned char* src, LPDWORD nsrc,
 396                       DWORD dstRate, unsigned char* dst, LPDWORD ndst)
 397 {
 398     DWORD error = dstRate / 2;
 399     TRACE("(%d, %p, %p, %d, %p, %p)\n", srcRate, src, nsrc, dstRate, dst, ndst);
 400
 401     while ((*ndst)--) {
 402         *dst++ = *src;
 403         *dst++ = *src;
 404         error = error + srcRate;
 405         while (error > dstRate) {
 406             src += 2;
 407             (*nsrc)--;
 408             if (*nsrc == 0)
 409                 return;
 410             error = error - dstRate;
 411         }
 412     }
 413 }
 414
 415 static  void cvtSM88C(DWORD srcRate, const unsigned char* src, LPDWORD nsrc,
 416                       DWORD dstRate, unsigned char* dst, LPDWORD ndst)
 417 {
 418     DWORD error = dstRate / 2;
 419     TRACE("(%d, %p, %p, %d, %p, %p)\n", srcRate, src, nsrc, dstRate, dst, ndst);
 420
 421     while ((*ndst)--) {
 422         *dst++ = M8(src[0], src[1]);
 423         error = error + srcRate;
 424         while (error > dstRate) {
 425             src += 2;
 426             (*nsrc)--;
 427             if (*nsrc == 0)
 428                 return;
 429             error = error - dstRate;
 430         }
 431     }
 432 }
 433
 434 static  void cvtMS88C(DWORD srcRate, const unsigned char* src, LPDWORD nsrc,
 435                       DWORD dstRate, unsigned char* dst, LPDWORD ndst)
 436 {
 437     DWORD error = dstRate / 2;
 438     TRACE("(%d, %p, %p, %d, %p, %p)\n", srcRate, src, nsrc, dstRate, dst, ndst);
 439
 440     while ((*ndst)--) {
 441         *dst++ = *src;
 442         *dst++ = *src;
 443         error = error + srcRate;
 444         while (error > dstRate) {
 445             src++;
 446             (*nsrc)--;
 447             if (*nsrc == 0)
 448                 return;
 449             error = error - dstRate;
 450         }
 451     }
 452 }
 453
 454 static  void cvtMM88C(DWORD srcRate, const unsigned char* src, LPDWORD nsrc,
 455                       DWORD dstRate, unsigned char* dst, LPDWORD ndst)
 456 {
 457     DWORD error = dstRate / 2;
 458     TRACE("(%d, %p, %p, %d, %p, %p)\n", srcRate, src, nsrc, dstRate, dst, ndst);
 459
 460     while ((*ndst)--) {
 461         *dst++ = *src;
 462         error = error + srcRate;
 463         while (error > dstRate) {
 464             src++;
 465             (*nsrc)--;
 466             if (*nsrc==0)
 467                 return;
 468             error = error - dstRate;
 469         }
 470     }
 471 }
 472
 473 static  void cvtSS816C(DWORD srcRate, const unsigned char* src, LPDWORD nsrc,
 474                        DWORD dstRate, unsigned char* dst, LPDWORD ndst)
 475 {
 476     DWORD error = dstRate / 2;
 477     TRACE("(%d, %p, %p, %d, %p, %p)\n", srcRate, src, nsrc, dstRate, dst, ndst);
 478
 479     while ((*ndst)--) {
 480         W16(dst, C816(src[0])); dst += 2;
 481         W16(dst, C816(src[1])); dst += 2;
 482         error = error + srcRate;
 483         while (error > dstRate) {
 484             src += 2;
 485             (*nsrc)--;
 486             if (*nsrc==0)
 487                 return;
 488             error = error - dstRate;
 489         }
 490     }
 491 }
 492
 493 static  void cvtSM816C(DWORD srcRate, const unsigned char* src, LPDWORD nsrc,
 494                        DWORD dstRate, unsigned char* dst, LPDWORD ndst)
 495 {
 496     DWORD error = dstRate / 2;
 497     TRACE("(%d, %p, %p, %d, %p, %p)\n", srcRate, src, nsrc, dstRate, dst, ndst);
 498
 499     while ((*ndst)--) {
 500         W16(dst, M16(C816(src[0]), C816(src[1]))); dst += 2;
 501         error = error + srcRate;
 502         while (error > dstRate) {
 503             src += 2;
 504             (*nsrc)--;
 505             if (*nsrc==0)
 506                 return;
 507             error = error - dstRate;
 508         }
 509     }
 510 }
 511
 512 static  void cvtMS816C(DWORD srcRate, const unsigned char* src, LPDWORD nsrc,
 513                        DWORD dstRate, unsigned char* dst, LPDWORD ndst)
 514 {
 515     DWORD error = dstRate / 2;
 516     TRACE("(%d, %p, %p, %d, %p, %p)\n", srcRate, src, nsrc, dstRate, dst, ndst);
 517
 518     while ((*ndst)--) {
 519         W16(dst, C816(*src)); dst += 2;
 520         W16(dst, C816(*src)); dst += 2;
 521         error = error + srcRate;
 522         while (error > dstRate) {
 523             src++;
 524             (*nsrc)--;
 525             if (*nsrc==0)
 526                 return;
 527             error = error - dstRate;
 528         }
 529     }
 530 }
 531
 532 static  void cvtMM816C(DWORD srcRate, const unsigned char* src, LPDWORD nsrc,
 533                        DWORD dstRate, unsigned char* dst, LPDWORD ndst)
 534 {
 535     DWORD error = dstRate / 2;
 536     TRACE("(%d, %p, %p, %d, %p, %p)\n", srcRate, src, nsrc, dstRate, dst, ndst);
 537
 538     while ((*ndst)--) {
 539         W16(dst, C816(*src)); dst += 2;
 540         error = error + srcRate;
 541         while (error > dstRate) {
 542             src++;
 543             (*nsrc)--;
 544             if (*nsrc==0)
 545                 return;
 546             error = error - dstRate;
 547         }
 548     }
 549 }
 550
 551 static  void cvtSS168C(DWORD srcRate, const unsigned char* src, LPDWORD nsrc,
 552                        DWORD dstRate, unsigned char* dst, LPDWORD ndst)
 553 {
 554     DWORD error = dstRate / 2;
 555     TRACE("(%d, %p, %p, %d, %p, %p)\n", srcRate, src, nsrc, dstRate, dst, ndst);
 556
 557     while ((*ndst)--) {
 558         *dst++ = C168(R16(src));
 559         *dst++ = C168(R16(src + 2));
 560         error = error + srcRate;
 561         while (error > dstRate) {
 562             src += 4;
 563             (*nsrc)--;
 564             if (*nsrc==0)
 565                 return;
 566             error = error - dstRate;
 567         }
 568     }
 569 }
 570
 571 static  void cvtSM168C(DWORD srcRate, const unsigned char* src, LPDWORD nsrc,
 572                        DWORD dstRate, unsigned char* dst, LPDWORD ndst)
 573 {
 574     DWORD error = dstRate / 2;
 575     TRACE("(%d, %p, %p, %d, %p, %p)\n", srcRate, src, nsrc, dstRate, dst, ndst);
 576
 577     while ((*ndst)--) {
 578         *dst++ = C168(M16(R16(src), R16(src + 2)));
 579         error = error + srcRate;
 580         while (error > dstRate) {
 581             src += 4;
 582             (*nsrc)--;
 583             if (*nsrc==0)
 584                 return;
 585             error = error - dstRate;
 586         }
 587     }
 588 }
 589
 590 static  void cvtMS168C(DWORD srcRate, const unsigned char* src, LPDWORD nsrc,
 591                        DWORD dstRate, unsigned char* dst, LPDWORD ndst)
 592 {
 593     DWORD error = dstRate / 2;
 594     TRACE("(%d, %p, %p, %d, %p, %p)\n", srcRate, src, nsrc, dstRate, dst, ndst);
 595
 596     while ((*ndst)--) {
 597         *dst++ = C168(R16(src));
 598         *dst++ = C168(R16(src));
 599         error = error + srcRate;
 600         while (error > dstRate) {
 601             src += 2;
 602             (*nsrc)--;
 603             if (*nsrc==0)
 604                 return;
 605             error = error - dstRate;
 606         }
 607     }
 608 }
 609
 610 static  void cvtMM168C(DWORD srcRate, const unsigned char* src, LPDWORD nsrc,
 611                        DWORD dstRate, unsigned char* dst, LPDWORD ndst)
 612 {
 613     DWORD error = dstRate / 2;
 614     TRACE("(%d, %p, %p, %d, %p, %p)\n", srcRate, src, nsrc, dstRate, dst, ndst);
 615
 616     while ((*ndst)--) {
 617         *dst++ = C168(R16(src));
 618         error = error + srcRate;
 619         while (error > dstRate) {
 620             src += 2;
 621             (*nsrc)--;
 622             if (*nsrc == 0)
 623                 return;
 624             error = error - dstRate;
 625         }
 626     }
 627 }
 628
 629 static  void cvtSS1616C(DWORD srcRate, const unsigned char* src, LPDWORD nsrc,
 630                         DWORD dstRate, unsigned char* dst, LPDWORD ndst)
 631 {
 632     DWORD error = dstRate / 2;
 633     TRACE("(%d, %p, %p, %d, %p, %p)\n", srcRate, src, nsrc, dstRate, dst, ndst);
 634
 635     while ((*ndst)--) {
 636         W16(dst, R16(src)); dst += 2;
 637         W16(dst, R16(src)); dst += 2;
 638         error = error + srcRate;
 639         while (error > dstRate) {
 640             src += 4;
 641             (*nsrc)--;
 642             if (*nsrc == 0)
 643                 return;
 644             error = error - dstRate;
 645         }
 646     }
 647 }
 648
 649 static  void cvtSM1616C(DWORD srcRate, const unsigned char* src, LPDWORD nsrc,
 650                         DWORD dstRate, unsigned char* dst, LPDWORD ndst)
 651 {
 652     DWORD error = dstRate / 2;
 653     TRACE("(%d, %p, %p, %d, %p, %p)\n", srcRate, src, nsrc, dstRate, dst, ndst);
 654
 655     while ((*ndst)--) {
 656         W16(dst, M16(R16(src), R16(src + 2))); dst += 2;
 657         error = error + srcRate;
 658         while (error > dstRate) {
 659             src += 4;
 660             (*nsrc)--;
 661             if (*nsrc == 0)
 662                 return;
 663             error = error - dstRate;
 664         }
 665     }
 666 }
 667
 668 static  void cvtMS1616C(DWORD srcRate, const unsigned char* src, LPDWORD nsrc,
 669                         DWORD dstRate, unsigned char* dst, LPDWORD ndst)
 670 {
 671     DWORD error = dstRate / 2;
 672     TRACE("(%d, %p, %p, %d, %p, %p)\n", srcRate, src, nsrc, dstRate, dst, ndst);
 673
 674     while((*ndst)--) {
 675         W16(dst, R16(src)); dst += 2;
 676         W16(dst, R16(src)); dst += 2;
 677         error = error + srcRate;
 678         while (error > dstRate) {
 679             src += 2;
 680             (*nsrc)--;
 681             if (*nsrc == 0)
 682                 return;
 683             error = error - dstRate;
 684         }
 685     }
 686 }
 687
 688 static  void cvtMM1616C(DWORD srcRate, const unsigned char* src, LPDWORD nsrc,
 689                         DWORD dstRate, unsigned char* dst, LPDWORD ndst)
 690 {
 691     DWORD error = dstRate / 2;
 692     TRACE("(%d, %p, %p, %d, %p, %p)\n", srcRate, src, nsrc, dstRate, dst, ndst);
 693
 694     while ((*ndst)--) {
 695         W16(dst, R16(src)); dst += 2;
 696         error = error + srcRate;
 697         while (error > dstRate) {
 698             src += 2;
 699             (*nsrc)--;
 700             if (*nsrc == 0)
 701                 return;
 702             error = error - dstRate;
 703         }
 704     }
 705 }
 706
 707 typedef void (*PCM_CONVERT_CHANGE_RATE)(DWORD, const unsigned char*, LPDWORD, DWORD, unsigned char*, LPDWORD);
 708
 709 static const PCM_CONVERT_CHANGE_RATE PCM_ConvertChangeRate[16] = {
 710     cvtSS88C,   cvtSM88C,   cvtMS88C,   cvtMM88C,
 711     cvtSS816C,  cvtSM816C,  cvtMS816C,  cvtMM816C,
 712     cvtSS168C,  cvtSM168C,  cvtMS168C,  cvtMM168C,
 713     cvtSS1616C, cvtSM1616C, cvtMS1616C, cvtMM1616C,
 714 };
 715
 716 /***********************************************************************
 717  *           PCM_DriverDetails
 718  *
 719  */
 720 static  LRESULT PCM_DriverDetails(PACMDRIVERDETAILSW add)
 721 {
 722     TRACE("(%p)\n", add);
 723
 724     add->fccType = ACMDRIVERDETAILS_FCCTYPE_AUDIOCODEC;
 725     add->fccComp = ACMDRIVERDETAILS_FCCCOMP_UNDEFINED;
 726     add->wMid = 0xFF;
 727     add->wPid = 0x00;
 728     add->vdwACM = 0x01000000;
 729     add->vdwDriver = 0x01000000;
 730     add->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CONVERTER;
 731     add->cFormatTags = 1;
 732     add->cFilterTags = 0;
 733     add->hicon = NULL;
 734     MultiByteToWideChar( CP_ACP, 0, "WINE-PCM", -1,
 735                          add->szShortName, sizeof(add->szShortName)/sizeof(WCHAR) );
 736     MultiByteToWideChar( CP_ACP, 0, "Wine PCM converter", -1,
 737                          add->szLongName, sizeof(add->szLongName)/sizeof(WCHAR) );
 738     MultiByteToWideChar( CP_ACP, 0, "Brought to you by the Wine team...", -1,
 739                          add->szCopyright, sizeof(add->szCopyright)/sizeof(WCHAR) );
 740     MultiByteToWideChar( CP_ACP, 0, "Refer to LICENSE file", -1,
 741                          add->szLicensing, sizeof(add->szLicensing)/sizeof(WCHAR) );
 742     add->szFeatures[0] = 0;
 743
 744     return MMSYSERR_NOERROR;
 745 }
 746
 747 /***********************************************************************
 748  *           PCM_FormatTagDetails
 749  *
 750  */
 751 static  LRESULT PCM_FormatTagDetails(PACMFORMATTAGDETAILSW aftd, DWORD dwQuery)
 752 {
 753     TRACE("(%p, %08x)\n", aftd, dwQuery);
 754
 755     switch (dwQuery) {
 756     case ACM_FORMATTAGDETAILSF_INDEX:
 757         if (aftd->dwFormatTagIndex != 0) {
 758             WARN("not possible\n");
 759             return ACMERR_NOTPOSSIBLE;
 760         }
 761         break;
 762     case ACM_FORMATTAGDETAILSF_FORMATTAG:
 763         if (aftd->dwFormatTag != WAVE_FORMAT_PCM) {
 764             WARN("not possible\n");
 765             return ACMERR_NOTPOSSIBLE;
 766         }
 767         break;
 768     case ACM_FORMATTAGDETAILSF_LARGESTSIZE:
 769         if (aftd->dwFormatTag != WAVE_FORMAT_UNKNOWN &&
 770             aftd->dwFormatTag != WAVE_FORMAT_PCM) {
 771             WARN("not possible\n");
 772             return ACMERR_NOTPOSSIBLE;
 773         }
 774         break;
 775     default:
 776         WARN("Unsupported query %08x\n", dwQuery);
 777         return MMSYSERR_NOTSUPPORTED;
 778     }
 779
 780     aftd->dwFormatTagIndex = 0;
 781     aftd->dwFormatTag = WAVE_FORMAT_PCM;
 782     aftd->cbFormatSize = sizeof(PCMWAVEFORMAT);
 783     aftd->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CONVERTER;
 784     aftd->cStandardFormats = NUM_PCM_FORMATS;
 785     aftd->szFormatTag[0] = 0;
 786
 787     return MMSYSERR_NOERROR;
 788 }
 789
 790 /***********************************************************************
 791  *           PCM_FormatDetails
 792  *
 793  */
 794 static  LRESULT PCM_FormatDetails(PACMFORMATDETAILSW afd, DWORD dwQuery)
 795 {
 796     TRACE("(%p, %08x)\n", afd, dwQuery);
 797
 798     switch (dwQuery) {
 799     case ACM_FORMATDETAILSF_FORMAT:
 800         if (PCM_GetFormatIndex(afd->pwfx) == 0xFFFFFFFF) {
 801             WARN("not possible\n");
 802             return ACMERR_NOTPOSSIBLE;
 803         }
 804         break;
 805     case ACM_FORMATDETAILSF_INDEX:
 806         assert(afd->dwFormatIndex < NUM_PCM_FORMATS);
 807         afd->pwfx->wFormatTag = WAVE_FORMAT_PCM;
 808         afd->pwfx->nChannels = PCM_Formats[afd->dwFormatIndex].nChannels;
 809         afd->pwfx->nSamplesPerSec = PCM_Formats[afd->dwFormatIndex].rate;
 810         afd->pwfx->wBitsPerSample = PCM_Formats[afd->dwFormatIndex].nBits;
 811         /* native MSACM uses a PCMWAVEFORMAT structure, so cbSize is not
 812          * accessible afd->pwfx->cbSize = 0;
 813          */
 814         afd->pwfx->nBlockAlign =
 815             (afd->pwfx->nChannels * afd->pwfx->wBitsPerSample) / 8;
 816         afd->pwfx->nAvgBytesPerSec =
 817             afd->pwfx->nSamplesPerSec * afd->pwfx->nBlockAlign;
 818         break;
 819     default:
 820         WARN("Unsupported query %08x\n", dwQuery);
 821         return MMSYSERR_NOTSUPPORTED;
 822     }
 823
 824     afd->dwFormatTag = WAVE_FORMAT_PCM;
 825     afd->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CONVERTER;
 826     afd->szFormat[0] = 0; /* let MSACM format this for us... */
 827     afd->cbwfx = sizeof(PCMWAVEFORMAT);
 828
 829     return MMSYSERR_NOERROR;
 830 }
 831
 832 /***********************************************************************
 833  *           PCM_FormatSuggest
 834  *
 835  */
 836 static  LRESULT PCM_FormatSuggest(PACMDRVFORMATSUGGEST adfs)
 837 {
 838     TRACE("(%p)\n", adfs);
 839
 840     /* some tests ... */
 841     if (adfs->cbwfxSrc < sizeof(PCMWAVEFORMAT) ||
 842         adfs->cbwfxDst < sizeof(PCMWAVEFORMAT) ||
 843         PCM_GetFormatIndex(adfs->pwfxSrc) == 0xFFFFFFFF) {
 844             WARN("not possible\n");
 845             return ACMERR_NOTPOSSIBLE;
 846     }
 847
 848     /* is no suggestion for destination, then copy source value */
 849     if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_NCHANNELS)) {
 850         adfs->pwfxDst->nChannels = adfs->pwfxSrc->nChannels;
 851     }
 852     if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_NSAMPLESPERSEC)) {
 853         adfs->pwfxDst->nSamplesPerSec = adfs->pwfxSrc->nSamplesPerSec;
 854     }
 855     if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_WBITSPERSAMPLE)) {
 856         adfs->pwfxDst->wBitsPerSample = adfs->pwfxSrc->wBitsPerSample;
 857     }
 858     if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_WFORMATTAG)) {
 859         if (adfs->pwfxSrc->wFormatTag != WAVE_FORMAT_PCM) {
 860             WARN("not possible\n");
 861             return ACMERR_NOTPOSSIBLE;
 862         }
 863         adfs->pwfxDst->wFormatTag = adfs->pwfxSrc->wFormatTag;
 864     }
 865     /* check if result is ok */
 866     if (PCM_GetFormatIndex(adfs->pwfxDst) == 0xFFFFFFFF) {
 867         WARN("not possible\n");
 868         return ACMERR_NOTPOSSIBLE;
 869     }
 870
 871     /* recompute other values */
 872     adfs->pwfxDst->nBlockAlign = (adfs->pwfxDst->nChannels * adfs->pwfxDst->wBitsPerSample) / 8;
 873     adfs->pwfxDst->nAvgBytesPerSec = adfs->pwfxDst->nSamplesPerSec * adfs->pwfxDst->nBlockAlign;
 874
 875     return MMSYSERR_NOERROR;
 876 }
 877
 878 /***********************************************************************
 879  *           PCM_StreamOpen
 880  *
 881  */
 882 static  LRESULT PCM_StreamOpen(PACMDRVSTREAMINSTANCE adsi)
 883 {
 884     AcmPcmData* apd;
 885     int         idx = 0;
 886
 887     TRACE("(%p)\n", adsi);
 888
 889     assert(!(adsi->fdwOpen & ACM_STREAMOPENF_ASYNC));
 890
 891     apd = HeapAlloc(GetProcessHeap(), 0, sizeof(AcmPcmData));
 892     if (apd == 0) {
 893         WARN("no memory\n");
 894         return MMSYSERR_NOMEM;
 895     }
 896
 897     adsi->dwDriver = (DWORD_PTR)apd;
 898     adsi->fdwDriver = 0;
 899
 900     if (adsi->pwfxSrc->wBitsPerSample == 16) idx += 8;
 901     if (adsi->pwfxDst->wBitsPerSample == 16) idx += 4;
 902     if (adsi->pwfxSrc->nChannels      == 1)  idx += 2;
 903     if (adsi->pwfxDst->nChannels      == 1)  idx += 1;
 904
 905     if (adsi->pwfxSrc->nSamplesPerSec == adsi->pwfxDst->nSamplesPerSec) {
 906         apd->cvt.cvtKeepRate = PCM_ConvertKeepRate[idx];
 907     } else {
 908         adsi->fdwDriver |= PCM_RESAMPLE;
 909         apd->cvt.cvtChangeRate = PCM_ConvertChangeRate[idx];
 910     }
 911
 912     return MMSYSERR_NOERROR;
 913 }
 914
 915 /***********************************************************************
 916  *           PCM_StreamClose
 917  *
 918  */
 919 static  LRESULT PCM_StreamClose(PACMDRVSTREAMINSTANCE adsi)
 920 {
 921     TRACE("(%p)\n", adsi);
 922
 923     HeapFree(GetProcessHeap(), 0, (void*)adsi->dwDriver);
 924     return MMSYSERR_NOERROR;
 925 }
 926
 927 /***********************************************************************
 928  *           PCM_round
 929  *
 930  */
 931 static  inline DWORD    PCM_round(DWORD a, DWORD b, DWORD c)
 932 {
 933     assert(c);
 934     /* to be sure, always return an entire number of c... */
 935     return ((double)a * (double)b + (double)c - 1) / (double)c;
 936 }
 937
 938 /***********************************************************************
 939  *           PCM_StreamSize
 940  *
 941  */
 942 static  LRESULT PCM_StreamSize(PACMDRVSTREAMINSTANCE adsi, PACMDRVSTREAMSIZE adss)
 943 {
 944     DWORD       srcMask = ~(adsi->pwfxSrc->nBlockAlign - 1);
 945     DWORD       dstMask = ~(adsi->pwfxDst->nBlockAlign - 1);
 946
 947     TRACE("(%p, %p)\n", adsi, adss);
 948
 949     switch (adss->fdwSize) {
 950     case ACM_STREAMSIZEF_DESTINATION:
 951         /* cbDstLength => cbSrcLength */
 952         adss->cbSrcLength = PCM_round(adss->cbDstLength & dstMask,
 953                                       adsi->pwfxSrc->nAvgBytesPerSec,
 954                                       adsi->pwfxDst->nAvgBytesPerSec) & srcMask;
 955         break;
 956     case ACM_STREAMSIZEF_SOURCE:
 957         /* cbSrcLength => cbDstLength */
 958         adss->cbDstLength =  PCM_round(adss->cbSrcLength & srcMask,
 959                                        adsi->pwfxDst->nAvgBytesPerSec,
 960                                        adsi->pwfxSrc->nAvgBytesPerSec) & dstMask;
 961         break;
 962     default:
 963         WARN("Unsupported query %08x\n", adss->fdwSize);
 964         return MMSYSERR_NOTSUPPORTED;
 965     }
 966     return MMSYSERR_NOERROR;
 967 }
 968
 969 /***********************************************************************
 970  *           PCM_StreamConvert
 971  *
 972  */
 973 static LRESULT PCM_StreamConvert(PACMDRVSTREAMINSTANCE adsi, PACMDRVSTREAMHEADER adsh)
 974 {
 975     AcmPcmData* apd = (AcmPcmData*)adsi->dwDriver;
 976     DWORD       nsrc = NUM_OF(adsh->cbSrcLength, adsi->pwfxSrc->nBlockAlign);
 977     DWORD       ndst = NUM_OF(adsh->cbDstLength, adsi->pwfxDst->nBlockAlign);
 978
 979     TRACE("(%p, %p)\n", adsi, adsh);
 980
 981     TRACE("nsrc=%d,adsh->cbSrcLength=%d\n", nsrc, adsh->cbSrcLength);
 982     TRACE("ndst=%d,adsh->cbDstLength=%d\n", ndst, adsh->cbDstLength);
 983     TRACE("src [wFormatTag=%u, nChannels=%u, nSamplesPerSec=%u, nAvgBytesPerSec=%u, nBlockAlign=%u, wBitsPerSample=%u, cbSize=%u]\n",
 984           adsi->pwfxSrc->wFormatTag, adsi->pwfxSrc->nChannels, adsi->pwfxSrc->nSamplesPerSec, adsi->pwfxSrc->nAvgBytesPerSec,
 985           adsi->pwfxSrc->nBlockAlign, adsi->pwfxSrc->wBitsPerSample, adsi->pwfxSrc->cbSize);
 986     TRACE("dst [wFormatTag=%u, nChannels=%u, nSamplesPerSec=%u, nAvgBytesPerSec=%u, nBlockAlign=%u, wBitsPerSample=%u, cbSize=%u]\n",
 987           adsi->pwfxDst->wFormatTag, adsi->pwfxDst->nChannels, adsi->pwfxDst->nSamplesPerSec, adsi->pwfxDst->nAvgBytesPerSec,
 988           adsi->pwfxDst->nBlockAlign, adsi->pwfxDst->wBitsPerSample, adsi->pwfxDst->cbSize);
 989
 990     if (adsh->fdwConvert &
 991         ~(ACM_STREAMCONVERTF_BLOCKALIGN|
 992           ACM_STREAMCONVERTF_END|
 993           ACM_STREAMCONVERTF_START)) {
 994         FIXME("Unsupported fdwConvert (%08x), ignoring it\n", adsh->fdwConvert);
 995     }
 996     /* ACM_STREAMCONVERTF_BLOCKALIGN
 997      *  currently all conversions are block aligned, so do nothing for this flag
 998      * ACM_STREAMCONVERTF_END
 999      *  no pending data, so do nothing for this flag
1000      */
1001     if ((adsh->fdwConvert & ACM_STREAMCONVERTF_START) &&
1002         (adsi->fdwDriver & PCM_RESAMPLE)) {
1003     }
1004
1005     /* do the job */
1006     if (adsi->fdwDriver & PCM_RESAMPLE) {
1007         DWORD   nsrc2 = nsrc;
1008         DWORD   ndst2 = ndst;
1009         apd->cvt.cvtChangeRate(adsi->pwfxSrc->nSamplesPerSec, adsh->pbSrc, &nsrc2,
1010                                adsi->pwfxDst->nSamplesPerSec, adsh->pbDst, &ndst2);
1011         nsrc -= nsrc2;
1012         ndst -= ndst2;
1013     } else {
1014         if (nsrc < ndst) ndst = nsrc; else nsrc = ndst;
1015
1016         /* nsrc is now equal to ndst */
1017         apd->cvt.cvtKeepRate(adsh->pbSrc, nsrc, adsh->pbDst);
1018     }
1019
1020     adsh->cbSrcLengthUsed = nsrc * adsi->pwfxSrc->nBlockAlign;
1021     adsh->cbDstLengthUsed = ndst * adsi->pwfxDst->nBlockAlign;
1022
1023     return MMSYSERR_NOERROR;
1024 }
1025
1026 /**************************************************************************
1027  *                      DriverProc (MSACM32.@)
1028  */
1029 LRESULT CALLBACK PCM_DriverProc(DWORD_PTR dwDevID, HDRVR hDriv, UINT wMsg,
1030                                        LPARAM dwParam1, LPARAM dwParam2)
1031 {
1032     TRACE("(%08lx %p %u %08lx %08lx);\n",
1033           dwDevID, hDriv, wMsg, dwParam1, dwParam2);
1034
1035     switch (wMsg) {
1036     case DRV_LOAD:              return 1;
1037     case DRV_FREE:              return 1;
1038     case DRV_OPEN:              return PCM_drvOpen((LPSTR)dwParam1, (PACMDRVOPENDESCW)dwParam2);
1039     case DRV_CLOSE:             return PCM_drvClose(dwDevID);
1040     case DRV_ENABLE:            return 1;
1041     case DRV_DISABLE:           return 1;
1042     case DRV_QUERYCONFIGURE:    return 1;
1043     case DRV_CONFIGURE:         MessageBoxA(0, "MSACM PCM filter !", "Wine Driver", MB_OK); return 1;
1044     case DRV_INSTALL:           return DRVCNF_RESTART;
1045     case DRV_REMOVE:            return DRVCNF_RESTART;
1046
1047     case ACMDM_DRIVER_NOTIFY:
1048         /* no caching from other ACM drivers is done so far */
1049         return MMSYSERR_NOERROR;
1050
1051     case ACMDM_DRIVER_DETAILS:
1052         return PCM_DriverDetails((PACMDRIVERDETAILSW)dwParam1);
1053
1054     case ACMDM_FORMATTAG_DETAILS:
1055         return PCM_FormatTagDetails((PACMFORMATTAGDETAILSW)dwParam1, dwParam2);
1056
1057     case ACMDM_FORMAT_DETAILS:
1058         return PCM_FormatDetails((PACMFORMATDETAILSW)dwParam1, dwParam2);
1059
1060     case ACMDM_FORMAT_SUGGEST:
1061         return PCM_FormatSuggest((PACMDRVFORMATSUGGEST)dwParam1);
1062
1063     case ACMDM_STREAM_OPEN:
1064         return PCM_StreamOpen((PACMDRVSTREAMINSTANCE)dwParam1);
1065
1066     case ACMDM_STREAM_CLOSE:
1067         return PCM_StreamClose((PACMDRVSTREAMINSTANCE)dwParam1);
1068
1069     case ACMDM_STREAM_SIZE:
1070         return PCM_StreamSize((PACMDRVSTREAMINSTANCE)dwParam1, (PACMDRVSTREAMSIZE)dwParam2);
1071
1072     case ACMDM_STREAM_CONVERT:
1073         return PCM_StreamConvert((PACMDRVSTREAMINSTANCE)dwParam1, (PACMDRVSTREAMHEADER)dwParam2);
1074
1075     case ACMDM_HARDWARE_WAVE_CAPS_INPUT:
1076     case ACMDM_HARDWARE_WAVE_CAPS_OUTPUT:
1077         /* this converter is not a hardware driver */
1078     case ACMDM_FILTERTAG_DETAILS:
1079     case ACMDM_FILTER_DETAILS:
1080         /* this converter is not a filter */
1081     case ACMDM_STREAM_RESET:
1082         /* only needed for asynchronous driver... we aren't, so just say it */
1083     case ACMDM_STREAM_PREPARE:
1084     case ACMDM_STREAM_UNPREPARE:
1085         /* nothing special to do here... so don't do anything */
1086         return MMSYSERR_NOTSUPPORTED;
1087
1088     default:
1089         return DefDriverProc(dwDevID, hDriv, wMsg, dwParam1, dwParam2);
1090     }
1091 }