dlls/dsound/mixer.c

   1 /*                      DirectSound
   2  *
   3  * Copyright 1998 Marcus Meissner
   4  * Copyright 1998 Rob Riggs
   5  * Copyright 2000-2002 TransGaming Technologies, Inc.
   6  * Copyright 2007 Peter Dons Tychsen
   7  * Copyright 2007 Maarten Lankhorst
   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
  24 #include <assert.h>
  25 #include <stdarg.h>
  26 #include <math.h>       /* Insomnia - pow() function */
  27
  28 #define NONAMELESSSTRUCT
  29 #define NONAMELESSUNION
  30 #include "windef.h"
  31 #include "winbase.h"
  32 #include "mmsystem.h"
  33 #include "winternl.h"
  34 #include "wine/debug.h"
  35 #include "dsound.h"
  36 #include "dsdriver.h"
  37 #include "dsound_private.h"
  38
  39 WINE_DEFAULT_DEBUG_CHANNEL(dsound);
  40
  41 void DSOUND_RecalcVolPan(PDSVOLUMEPAN volpan)
  42 {
  43         double temp;
  44         TRACE("(%p)\n",volpan);
  45
  46         TRACE("Vol=%d Pan=%d\n", volpan->lVolume, volpan->lPan);
  47         /* the AmpFactors are expressed in 16.16 fixed point */
  48         volpan->dwVolAmpFactor = (ULONG) (pow(2.0, volpan->lVolume / 600.0) * 0xffff);
  49         /* FIXME: dwPan{Left|Right}AmpFactor */
  50
  51         /* FIXME: use calculated vol and pan ampfactors */
  52         temp = (double) (volpan->lVolume - (volpan->lPan > 0 ? volpan->lPan : 0));
  53         volpan->dwTotalLeftAmpFactor = (ULONG) (pow(2.0, temp / 600.0) * 0xffff);
  54         temp = (double) (volpan->lVolume + (volpan->lPan < 0 ? volpan->lPan : 0));
  55         volpan->dwTotalRightAmpFactor = (ULONG) (pow(2.0, temp / 600.0) * 0xffff);
  56
  57         TRACE("left = %x, right = %x\n", volpan->dwTotalLeftAmpFactor, volpan->dwTotalRightAmpFactor);
  58 }
  59
  60 void DSOUND_AmpFactorToVolPan(PDSVOLUMEPAN volpan)
  61 {
  62     double left,right;
  63     TRACE("(%p)\n",volpan);
  64
  65     TRACE("left=%x, right=%x\n",volpan->dwTotalLeftAmpFactor,volpan->dwTotalRightAmpFactor);
  66     if (volpan->dwTotalLeftAmpFactor==0)
  67         left=-10000;
  68     else
  69         left=600 * log(((double)volpan->dwTotalLeftAmpFactor) / 0xffff) / log(2);
  70     if (volpan->dwTotalRightAmpFactor==0)
  71         right=-10000;
  72     else
  73         right=600 * log(((double)volpan->dwTotalRightAmpFactor) / 0xffff) / log(2);
  74     if (left<right)
  75     {
  76         volpan->lVolume=right;
  77         volpan->dwVolAmpFactor=volpan->dwTotalRightAmpFactor;
  78     }
  79     else
  80     {
  81         volpan->lVolume=left;
  82         volpan->dwVolAmpFactor=volpan->dwTotalLeftAmpFactor;
  83     }
  84     if (volpan->lVolume < -10000)
  85         volpan->lVolume=-10000;
  86     volpan->lPan=right-left;
  87     if (volpan->lPan < -10000)
  88         volpan->lPan=-10000;
  89
  90     TRACE("Vol=%d Pan=%d\n", volpan->lVolume, volpan->lPan);
  91 }
  92
  93 /** Convert a primary buffer position to a pointer position for device->mix_buffer
  94  * device: DirectSoundDevice for which to calculate
  95  * pos: Primary buffer position to converts
  96  * Returns: Offset for mix_buffer
  97  */
  98 DWORD DSOUND_bufpos_to_mixpos(const DirectSoundDevice* device, DWORD pos)
  99 {
 100     DWORD ret = pos * 32 / device->pwfx->wBitsPerSample;
 101     if (device->pwfx->wBitsPerSample == 32)
 102         ret *= 2;
 103     return ret;
 104 }
 105
 106 /* NOTE: Not all secpos have to always be mapped to a bufpos, other way around is always the case
 107  * DWORD64 is used here because a single DWORD wouldn't be big enough to fit the freqAcc for big buffers
 108  */
 109 /** This function converts a 'native' sample pointer to a resampled pointer that fits for primary
 110  * secmixpos is used to decide which freqAcc is needed
 111  * overshot tells what the 'actual' secpos is now (optional)
 112  */
 113 DWORD DSOUND_secpos_to_bufpos(const IDirectSoundBufferImpl *dsb, DWORD secpos, DWORD secmixpos, DWORD* overshot)
 114 {
 115         DWORD64 framelen = secpos / dsb->pwfx->nBlockAlign;
 116         DWORD64 freqAdjust = dsb->freqAdjust;
 117         DWORD64 acc, freqAcc;
 118
 119         if (secpos < secmixpos)
 120                 freqAcc = dsb->freqAccNext;
 121         else freqAcc = dsb->freqAcc;
 122         acc = (framelen << DSOUND_FREQSHIFT) + (freqAdjust - 1 - freqAcc);
 123         acc /= freqAdjust;
 124         if (overshot)
 125         {
 126                 DWORD64 oshot = acc * freqAdjust + freqAcc;
 127                 assert(oshot >= framelen << DSOUND_FREQSHIFT);
 128                 oshot -= framelen << DSOUND_FREQSHIFT;
 129                 *overshot = (DWORD)oshot;
 130                 assert(*overshot < dsb->freqAdjust);
 131         }
 132         return (DWORD)acc * dsb->device->pwfx->nBlockAlign;
 133 }
 134
 135 /** Convert a resampled pointer that fits for primary to a 'native' sample pointer
 136  * freqAccNext is used here rather than freqAcc: In case the app wants to fill up to
 137  * the play position it won't overwrite it
 138  */
 139 static DWORD DSOUND_bufpos_to_secpos(const IDirectSoundBufferImpl *dsb, DWORD bufpos)
 140 {
 141         DWORD oAdv = dsb->device->pwfx->nBlockAlign, iAdv = dsb->pwfx->nBlockAlign, pos;
 142         DWORD64 framelen;
 143         DWORD64 acc;
 144
 145         framelen = bufpos/oAdv;
 146         acc = framelen * (DWORD64)dsb->freqAdjust + (DWORD64)dsb->freqAccNext;
 147         acc = acc >> DSOUND_FREQSHIFT;
 148         pos = (DWORD)acc * iAdv;
 149         if (pos >= dsb->buflen)
 150                 /* Because of differences between freqAcc and freqAccNext, this might happen */
 151                 pos = dsb->buflen - iAdv;
 152         TRACE("Converted %d/%d to %d/%d\n", bufpos, dsb->tmp_buffer_len, pos, dsb->buflen);
 153         return pos;
 154 }
 155
 156 /**
 157  * Move freqAccNext to freqAcc, and find new values for buffer length and freqAccNext
 158  */
 159 static void DSOUND_RecalcFreqAcc(IDirectSoundBufferImpl *dsb)
 160 {
 161         if (!dsb->freqneeded) return;
 162         dsb->freqAcc = dsb->freqAccNext;
 163         dsb->tmp_buffer_len = DSOUND_secpos_to_bufpos(dsb, dsb->buflen, 0, &dsb->freqAccNext);
 164         TRACE("New freqadjust: %04x, new buflen: %d\n", dsb->freqAccNext, dsb->tmp_buffer_len);
 165 }
 166
 167 /**
 168  * Recalculate the size for temporary buffer, and new writelead
 169  * Should be called when one of the following things occur:
 170  * - Primary buffer format is changed
 171  * - This buffer format (frequency) is changed
 172  *
 173  * After this, DSOUND_MixToTemporary(dsb, 0, dsb->buflen) should
 174  * be called to refill the temporary buffer with data.
 175  */
 176 void DSOUND_RecalcFormat(IDirectSoundBufferImpl *dsb)
 177 {
 178         BOOL needremix = TRUE, needresample = (dsb->freq != dsb->device->pwfx->nSamplesPerSec);
 179         DWORD bAlign = dsb->pwfx->nBlockAlign, pAlign = dsb->device->pwfx->nBlockAlign;
 180
 181         TRACE("(%p)\n",dsb);
 182
 183         /* calculate the 10ms write lead */
 184         dsb->writelead = (dsb->freq / 100) * dsb->pwfx->nBlockAlign;
 185
 186         if ((dsb->pwfx->wBitsPerSample == dsb->device->pwfx->wBitsPerSample) &&
 187             (dsb->pwfx->nChannels == dsb->device->pwfx->nChannels) && !needresample)
 188                 needremix = FALSE;
 189         HeapFree(GetProcessHeap(), 0, dsb->tmp_buffer);
 190         dsb->tmp_buffer = NULL;
 191         dsb->max_buffer_len = dsb->freqAcc = dsb->freqAccNext = 0;
 192         dsb->freqneeded = needresample;
 193
 194         dsb->convert = convertbpp[dsb->pwfx->wBitsPerSample/8 - 1][dsb->device->pwfx->wBitsPerSample/8 - 1];
 195
 196         dsb->resampleinmixer = FALSE;
 197
 198         if (needremix)
 199         {
 200                 if (needresample)
 201                         DSOUND_RecalcFreqAcc(dsb);
 202                 else
 203                         dsb->tmp_buffer_len = dsb->buflen / bAlign * pAlign;
 204                 dsb->max_buffer_len = dsb->tmp_buffer_len;
 205                 if ((dsb->max_buffer_len <= dsb->device->buflen || dsb->max_buffer_len < ds_snd_shadow_maxsize * 1024 * 1024) && ds_snd_shadow_maxsize >= 0)
 206                         dsb->tmp_buffer = HeapAlloc(GetProcessHeap(), 0, dsb->max_buffer_len);
 207                 if (dsb->tmp_buffer)
 208                         FillMemory(dsb->tmp_buffer, dsb->tmp_buffer_len, dsb->device->pwfx->wBitsPerSample == 8 ? 128 : 0);
 209                 else
 210                         dsb->resampleinmixer = TRUE;
 211         }
 212         else dsb->max_buffer_len = dsb->tmp_buffer_len = dsb->buflen;
 213         dsb->buf_mixpos = DSOUND_secpos_to_bufpos(dsb, dsb->sec_mixpos, 0, NULL);
 214 }
 215
 216 /**
 217  * Check for application callback requests for when the play position
 218  * reaches certain points.
 219  *
 220  * The offsets that will be triggered will be those between the recorded
 221  * "last played" position for the buffer (i.e. dsb->playpos) and "len" bytes
 222  * beyond that position.
 223  */
 224 void DSOUND_CheckEvent(const IDirectSoundBufferImpl *dsb, DWORD playpos, int len)
 225 {
 226         int                     i;
 227         DWORD                   offset;
 228         LPDSBPOSITIONNOTIFY     event;
 229         TRACE("(%p,%d)\n",dsb,len);
 230
 231         if (dsb->nrofnotifies == 0)
 232                 return;
 233
 234         TRACE("(%p) buflen = %d, playpos = %d, len = %d\n",
 235                 dsb, dsb->buflen, playpos, len);
 236         for (i = 0; i < dsb->nrofnotifies ; i++) {
 237                 event = dsb->notifies + i;
 238                 offset = event->dwOffset;
 239                 TRACE("checking %d, position %d, event = %p\n",
 240                         i, offset, event->hEventNotify);
 241                 /* DSBPN_OFFSETSTOP has to be the last element. So this is */
 242                 /* OK. [Inside DirectX, p274] */
 243                 /* Windows does not seem to enforce this, and some apps rely */
 244                 /* on that, so we can't stop there. */
 245                 /*  */
 246                 /* This also means we can't sort the entries by offset, */
 247                 /* because DSBPN_OFFSETSTOP == -1 */
 248                 if (offset == DSBPN_OFFSETSTOP) {
 249                         if (dsb->state == STATE_STOPPED) {
 250                                 SetEvent(event->hEventNotify);
 251                                 TRACE("signalled event %p (%d)\n", event->hEventNotify, i);
 252                         }
 253                         continue;
 254                 }
 255                 if ((playpos + len) >= dsb->buflen) {
 256                         if ((offset < ((playpos + len) % dsb->buflen)) ||
 257                             (offset >= playpos)) {
 258                                 TRACE("signalled event %p (%d)\n", event->hEventNotify, i);
 259                                 SetEvent(event->hEventNotify);
 260                         }
 261                 } else {
 262                         if ((offset >= playpos) && (offset < (playpos + len))) {
 263                                 TRACE("signalled event %p (%d)\n", event->hEventNotify, i);
 264                                 SetEvent(event->hEventNotify);
 265                         }
 266                 }
 267         }
 268 }
 269
 270 /**
 271  * Copy a single frame from the given input buffer to the given output buffer.
 272  * Translate 8 <-> 16 bits and mono <-> stereo
 273  */
 274 static inline void cp_fields(const IDirectSoundBufferImpl *dsb, const BYTE *ibuf, BYTE *obuf,
 275         UINT istride, UINT ostride, UINT count, UINT freqAcc, UINT adj)
 276 {
 277     DirectSoundDevice *device = dsb->device;
 278     INT istep = dsb->pwfx->wBitsPerSample / 8, ostep = device->pwfx->wBitsPerSample / 8;
 279
 280     if (device->pwfx->nChannels == dsb->pwfx->nChannels ||
 281         (device->pwfx->nChannels == 2 && dsb->pwfx->nChannels == 6)) {
 282         dsb->convert(ibuf, obuf, istride, ostride, count, freqAcc, adj);
 283         if (device->pwfx->nChannels == 2)
 284             dsb->convert(ibuf + istep, obuf + ostep, istride, ostride, count, freqAcc, adj);
 285     }
 286
 287     if (device->pwfx->nChannels == 1 && dsb->pwfx->nChannels == 2)
 288     {
 289         dsb->convert(ibuf, obuf, istride, ostride, count, freqAcc, adj);
 290     }
 291
 292     if (device->pwfx->nChannels == 2 && dsb->pwfx->nChannels == 1)
 293     {
 294         dsb->convert(ibuf, obuf, istride, ostride, count, freqAcc, adj);
 295         dsb->convert(ibuf, obuf + ostep, istride, ostride, count, freqAcc, adj);
 296     }
 297 }
 298
 299 /**
 300  * Calculate the distance between two buffer offsets, taking wraparound
 301  * into account.
 302  */
 303 static inline DWORD DSOUND_BufPtrDiff(DWORD buflen, DWORD ptr1, DWORD ptr2)
 304 {
 305 /* If these asserts fail, the problem is not here, but in the underlying code */
 306         assert(ptr1 < buflen);
 307         assert(ptr2 < buflen);
 308         if (ptr1 >= ptr2) {
 309                 return ptr1 - ptr2;
 310         } else {
 311                 return buflen + ptr1 - ptr2;
 312         }
 313 }
 314 /**
 315  * Mix at most the given amount of data into the allocated temporary buffer
 316  * of the given secondary buffer, starting from the dsb's first currently
 317  * unsampled frame (writepos), translating frequency (pitch), stereo/mono
 318  * and bits-per-sample so that it is ideal for the primary buffer.
 319  * Doesn't perform any mixing - this is a straight copy/convert operation.
 320  *
 321  * dsb = the secondary buffer
 322  * writepos = Starting position of changed buffer
 323  * len = number of bytes to resample from writepos
 324  *
 325  * NOTE: writepos + len <= buflen. When called by mixer, MixOne makes sure of this.
 326  */
 327 void DSOUND_MixToTemporary(const IDirectSoundBufferImpl *dsb, DWORD writepos, DWORD len, BOOL inmixer)
 328 {
 329         INT     size;
 330         BYTE    *ibp, *obp, *obp_begin;
 331         INT     iAdvance = dsb->pwfx->nBlockAlign;
 332         INT     oAdvance = dsb->device->pwfx->nBlockAlign;
 333         DWORD freqAcc, target_writepos = 0, overshot, maxlen;
 334
 335         /* We resample only when needed */
 336         if ((dsb->tmp_buffer && inmixer) || (!dsb->tmp_buffer && !inmixer) || dsb->resampleinmixer != inmixer)
 337                 return;
 338
 339         assert(writepos + len <= dsb->buflen);
 340         if (inmixer && writepos + len < dsb->buflen)
 341                 len += dsb->pwfx->nBlockAlign;
 342
 343         maxlen = DSOUND_secpos_to_bufpos(dsb, len, 0, NULL);
 344
 345         ibp = dsb->buffer->memory + writepos;
 346         if (!inmixer)
 347                 obp_begin = dsb->tmp_buffer;
 348         else if (dsb->device->tmp_buffer_len < maxlen || !dsb->device->tmp_buffer)
 349         {
 350                 dsb->device->tmp_buffer_len = maxlen;
 351                 if (dsb->device->tmp_buffer)
 352                         dsb->device->tmp_buffer = HeapReAlloc(GetProcessHeap(), 0, dsb->device->tmp_buffer, maxlen);
 353                 else
 354                         dsb->device->tmp_buffer = HeapAlloc(GetProcessHeap(), 0, maxlen);
 355                 obp_begin = dsb->device->tmp_buffer;
 356         }
 357         else
 358                 obp_begin = dsb->device->tmp_buffer;
 359
 360         TRACE("(%p, %p)\n", dsb, ibp);
 361         size = len / iAdvance;
 362
 363         /* Check for same sample rate */
 364         if (dsb->freq == dsb->device->pwfx->nSamplesPerSec) {
 365                 TRACE("(%p) Same sample rate %d = primary %d\n", dsb,
 366                         dsb->freq, dsb->device->pwfx->nSamplesPerSec);
 367                 obp = obp_begin;
 368                 if (!inmixer)
 369                          obp += writepos/iAdvance*oAdvance;
 370
 371                 cp_fields(dsb, ibp, obp, iAdvance, oAdvance, size, 0, 1 << DSOUND_FREQSHIFT);
 372                 return;
 373         }
 374
 375         /* Mix in different sample rates */
 376         TRACE("(%p) Adjusting frequency: %d -> %d\n", dsb, dsb->freq, dsb->device->pwfx->nSamplesPerSec);
 377
 378         target_writepos = DSOUND_secpos_to_bufpos(dsb, writepos, dsb->sec_mixpos, &freqAcc);
 379         overshot = freqAcc >> DSOUND_FREQSHIFT;
 380         if (overshot)
 381         {
 382                 if (overshot >= size)
 383                         return;
 384                 size -= overshot;
 385                 writepos += overshot * iAdvance;
 386                 if (writepos >= dsb->buflen)
 387                         return;
 388                 ibp = dsb->buffer->memory + writepos;
 389                 freqAcc &= (1 << DSOUND_FREQSHIFT) - 1;
 390                 TRACE("Overshot: %d, freqAcc: %04x\n", overshot, freqAcc);
 391         }
 392
 393         if (!inmixer)
 394                 obp = obp_begin + target_writepos;
 395         else obp = obp_begin;
 396
 397         /* FIXME: Small problem here when we're overwriting buf_mixpos, it then STILL uses old freqAcc, not sure if it matters or not */
 398         cp_fields(dsb, ibp, obp, iAdvance, oAdvance, size, freqAcc, dsb->freqAdjust);
 399 }
 400
 401 /** Apply volume to the given soundbuffer from (primary) position writepos and length len
 402  * Returns: NULL if no volume needs to be applied
 403  * or else a memory handle that holds 'len' volume adjusted buffer */
 404 static LPBYTE DSOUND_MixerVol(const IDirectSoundBufferImpl *dsb, INT len)
 405 {
 406         INT     i;
 407         BYTE    *bpc;
 408         INT16   *bps, *mems;
 409         DWORD vLeft, vRight;
 410         INT nChannels = dsb->device->pwfx->nChannels;
 411         LPBYTE mem = (dsb->tmp_buffer ? dsb->tmp_buffer : dsb->buffer->memory) + dsb->buf_mixpos;
 412
 413         if (dsb->resampleinmixer)
 414                 mem = dsb->device->tmp_buffer;
 415
 416         TRACE("(%p,%d)\n",dsb,len);
 417         TRACE("left = %x, right = %x\n", dsb->volpan.dwTotalLeftAmpFactor,
 418                 dsb->volpan.dwTotalRightAmpFactor);
 419
 420         if ((!(dsb->dsbd.dwFlags & DSBCAPS_CTRLPAN) || (dsb->volpan.lPan == 0)) &&
 421             (!(dsb->dsbd.dwFlags & DSBCAPS_CTRLVOLUME) || (dsb->volpan.lVolume == 0)) &&
 422              !(dsb->dsbd.dwFlags & DSBCAPS_CTRL3D))
 423                 return NULL; /* Nothing to do */
 424
 425         if (nChannels != 1 && nChannels != 2)
 426         {
 427                 FIXME("There is no support for %d channels\n", nChannels);
 428                 return NULL;
 429         }
 430
 431         if (dsb->device->pwfx->wBitsPerSample != 8 && dsb->device->pwfx->wBitsPerSample != 16)
 432         {
 433                 FIXME("There is no support for %d bpp\n", dsb->device->pwfx->wBitsPerSample);
 434                 return NULL;
 435         }
 436
 437         if (dsb->device->tmp_buffer_len < len || !dsb->device->tmp_buffer)
 438         {
 439                 /* If we just resampled in DSOUND_MixToTemporary, we shouldn't need to resize here */
 440                 assert(!dsb->resampleinmixer);
 441                 dsb->device->tmp_buffer_len = len;
 442                 if (dsb->device->tmp_buffer)
 443                         dsb->device->tmp_buffer = HeapReAlloc(GetProcessHeap(), 0, dsb->device->tmp_buffer, len);
 444                 else
 445                         dsb->device->tmp_buffer = HeapAlloc(GetProcessHeap(), 0, len);
 446         }
 447
 448         bpc = dsb->device->tmp_buffer;
 449         bps = (INT16 *)bpc;
 450         mems = (INT16 *)mem;
 451         vLeft = dsb->volpan.dwTotalLeftAmpFactor;
 452         if (nChannels > 1)
 453                 vRight = dsb->volpan.dwTotalRightAmpFactor;
 454         else
 455                 vRight = vLeft;
 456
 457         switch (dsb->device->pwfx->wBitsPerSample) {
 458         case 8:
 459                 /* 8-bit WAV is unsigned, but we need to operate */
 460                 /* on signed data for this to work properly */
 461                 for (i = 0; i < len-1; i+=2) {
 462                         *(bpc++) = (((*(mem++) - 128) * vLeft) >> 16) + 128;
 463                         *(bpc++) = (((*(mem++) - 128) * vRight) >> 16) + 128;
 464                 }
 465                 if (len % 2 == 1 && nChannels == 1)
 466                         *(bpc++) = (((*(mem++) - 128) * vLeft) >> 16) + 128;
 467                 break;
 468         case 16:
 469                 /* 16-bit WAV is signed -- much better */
 470                 for (i = 0; i < len-3; i += 4) {
 471                         *(bps++) = (*(mems++) * vLeft) >> 16;
 472                         *(bps++) = (*(mems++) * vRight) >> 16;
 473                 }
 474                 if (len % 4 == 2 && nChannels == 1)
 475                         *(bps++) = ((INT)*(mems++) * vLeft) >> 16;
 476                 break;
 477         }
 478         return dsb->device->tmp_buffer;
 479 }
 480
 481 /**
 482  * Mix (at most) the given number of bytes into the given position of the
 483  * device buffer, from the secondary buffer "dsb" (starting at the current
 484  * mix position for that buffer).
 485  *
 486  * Returns the number of bytes actually mixed into the device buffer. This
 487  * will match fraglen unless the end of the secondary buffer is reached
 488  * (and it is not looping).
 489  *
 490  * dsb  = the secondary buffer to mix from
 491  * writepos = position (offset) in device buffer to write at
 492  * fraglen = number of bytes to mix
 493  */
 494 static DWORD DSOUND_MixInBuffer(IDirectSoundBufferImpl *dsb, DWORD writepos, DWORD fraglen)
 495 {
 496         INT len = fraglen, ilen;
 497         BYTE *ibuf = (dsb->tmp_buffer ? dsb->tmp_buffer : dsb->buffer->memory) + dsb->buf_mixpos, *volbuf;
 498         DWORD oldpos, mixbufpos;
 499
 500         TRACE("buf_mixpos=%d/%d sec_mixpos=%d/%d\n", dsb->buf_mixpos, dsb->tmp_buffer_len, dsb->sec_mixpos, dsb->buflen);
 501         TRACE("(%p,%d,%d)\n",dsb,writepos,fraglen);
 502
 503         assert(dsb->buf_mixpos + len <= dsb->tmp_buffer_len);
 504
 505         if (len % dsb->device->pwfx->nBlockAlign) {
 506                 INT nBlockAlign = dsb->device->pwfx->nBlockAlign;
 507                 ERR("length not a multiple of block size, len = %d, block size = %d\n", len, nBlockAlign);
 508                 len -= len % nBlockAlign; /* data alignment */
 509         }
 510
 511         /* Resample buffer to temporary buffer specifically allocated for this purpose, if needed */
 512         DSOUND_MixToTemporary(dsb, dsb->sec_mixpos, DSOUND_bufpos_to_secpos(dsb, dsb->buf_mixpos+len) - dsb->sec_mixpos, TRUE);
 513         if (dsb->resampleinmixer)
 514                 ibuf = dsb->device->tmp_buffer;
 515
 516         /* Apply volume if needed */
 517         volbuf = DSOUND_MixerVol(dsb, len);
 518         if (volbuf)
 519                 ibuf = volbuf;
 520
 521         mixbufpos = DSOUND_bufpos_to_mixpos(dsb->device, writepos);
 522         /* Now mix the temporary buffer into the devices main buffer */
 523         if ((writepos + len) <= dsb->device->buflen)
 524                 dsb->device->mixfunction(ibuf, dsb->device->mix_buffer + mixbufpos, len);
 525         else
 526         {
 527                 DWORD todo = dsb->device->buflen - writepos;
 528                 dsb->device->mixfunction(ibuf, dsb->device->mix_buffer + mixbufpos, todo);
 529                 dsb->device->mixfunction(ibuf + todo, dsb->device->mix_buffer, len - todo);
 530         }
 531
 532         oldpos = dsb->sec_mixpos;
 533         dsb->buf_mixpos += len;
 534
 535         if (dsb->buf_mixpos >= dsb->tmp_buffer_len) {
 536                 if (dsb->buf_mixpos > dsb->tmp_buffer_len)
 537                         ERR("Mixpos (%u) past buflen (%u), capping...\n", dsb->buf_mixpos, dsb->tmp_buffer_len);
 538                 if (dsb->playflags & DSBPLAY_LOOPING) {
 539                         dsb->buf_mixpos -= dsb->tmp_buffer_len;
 540                 } else if (dsb->buf_mixpos >= dsb->tmp_buffer_len) {
 541                         dsb->buf_mixpos = dsb->sec_mixpos = 0;
 542                         dsb->state = STATE_STOPPED;
 543                 }
 544                 DSOUND_RecalcFreqAcc(dsb);
 545         }
 546
 547         dsb->sec_mixpos = DSOUND_bufpos_to_secpos(dsb, dsb->buf_mixpos);
 548         ilen = DSOUND_BufPtrDiff(dsb->buflen, dsb->sec_mixpos, oldpos);
 549         /* check for notification positions */
 550         if (dsb->dsbd.dwFlags & DSBCAPS_CTRLPOSITIONNOTIFY &&
 551             dsb->state != STATE_STARTING) {
 552                 DSOUND_CheckEvent(dsb, oldpos, ilen);
 553         }
 554
 555         /* increase mix position */
 556         dsb->primary_mixpos += len;
 557         if (dsb->primary_mixpos >= dsb->device->buflen)
 558                 dsb->primary_mixpos -= dsb->device->buflen;
 559         return len;
 560 }
 561
 562 /**
 563  * Mix some frames from the given secondary buffer "dsb" into the device
 564  * primary buffer.
 565  *
 566  * dsb = the secondary buffer
 567  * playpos = the current play position in the device buffer (primary buffer)
 568  * writepos = the current safe-to-write position in the device buffer
 569  * mixlen = the maximum number of bytes in the primary buffer to mix, from the
 570  *          current writepos.
 571  *
 572  * Returns: the number of bytes beyond the writepos that were mixed.
 573  */
 574 static DWORD DSOUND_MixOne(IDirectSoundBufferImpl *dsb, DWORD writepos, DWORD mixlen)
 575 {
 576         /* The buffer's primary_mixpos may be before or after the device
 577          * buffer's mixpos, but both must be ahead of writepos. */
 578         DWORD primary_done;
 579
 580         TRACE("(%p,%d,%d)\n",dsb,writepos,mixlen);
 581         TRACE("writepos=%d, buf_mixpos=%d, primary_mixpos=%d, mixlen=%d\n", writepos, dsb->buf_mixpos, dsb->primary_mixpos, mixlen);
 582         TRACE("looping=%d, leadin=%d, buflen=%d\n", dsb->playflags, dsb->leadin, dsb->tmp_buffer_len);
 583
 584         /* If leading in, only mix about 20 ms, and 'skip' mixing the rest, for more fluid pointer advancement */
 585         if (dsb->leadin && dsb->state == STATE_STARTING)
 586         {
 587                 if (mixlen > 2 * dsb->device->fraglen)
 588                 {
 589                         dsb->primary_mixpos += mixlen - 2 * dsb->device->fraglen;
 590                         dsb->primary_mixpos %= dsb->device->buflen;
 591                 }
 592         }
 593         dsb->leadin = FALSE;
 594
 595         /* calculate how much pre-buffering has already been done for this buffer */
 596         primary_done = DSOUND_BufPtrDiff(dsb->device->buflen, dsb->primary_mixpos, writepos);
 597
 598         /* sanity */
 599         if(mixlen < primary_done)
 600         {
 601                 /* Should *NEVER* happen */
 602                 ERR("Fatal error. Under/Overflow? primary_done=%d, mixpos=%d/%d (%d/%d), primary_mixpos=%d, writepos=%d, mixlen=%d\n", primary_done,dsb->buf_mixpos,dsb->tmp_buffer_len,dsb->sec_mixpos, dsb->buflen, dsb->primary_mixpos, writepos, mixlen);
 603                 dsb->primary_mixpos = writepos + mixlen;
 604                 dsb->primary_mixpos %= dsb->device->buflen;
 605                 return mixlen;
 606         }
 607
 608         /* take into account already mixed data */
 609         mixlen -= primary_done;
 610
 611         TRACE("primary_done=%d, mixlen (primary) = %i\n", primary_done, mixlen);
 612
 613         if (!mixlen)
 614                 return primary_done;
 615
 616         /* First try to mix to the end of the buffer if possible
 617          * Theoretically it would allow for better optimization
 618         */
 619         if (mixlen + dsb->buf_mixpos >= dsb->tmp_buffer_len)
 620         {
 621                 DWORD newmixed, mixfirst = dsb->tmp_buffer_len - dsb->buf_mixpos;
 622                 newmixed = DSOUND_MixInBuffer(dsb, dsb->primary_mixpos, mixfirst);
 623                 mixlen -= newmixed;
 624
 625                 if (dsb->playflags & DSBPLAY_LOOPING)
 626                         while (newmixed && mixlen)
 627                         {
 628                                 mixfirst = (dsb->tmp_buffer_len < mixlen ? dsb->tmp_buffer_len : mixlen);
 629                                 newmixed = DSOUND_MixInBuffer(dsb, dsb->primary_mixpos, mixfirst);
 630                                 mixlen -= newmixed;
 631                         }
 632         }
 633         else DSOUND_MixInBuffer(dsb, dsb->primary_mixpos, mixlen);
 634
 635         /* re-calculate the primary done */
 636         primary_done = DSOUND_BufPtrDiff(dsb->device->buflen, dsb->primary_mixpos, writepos);
 637
 638         TRACE("new primary_mixpos=%d, total mixed data=%d\n", dsb->primary_mixpos, primary_done);
 639
 640         /* Report back the total prebuffered amount for this buffer */
 641         return primary_done;
 642 }
 643
 644 /**
 645  * For a DirectSoundDevice, go through all the currently playing buffers and
 646  * mix them in to the device buffer.
 647  *
 648  * writepos = the current safe-to-write position in the primary buffer
 649  * mixlen = the maximum amount to mix into the primary buffer
 650  *          (beyond the current writepos)
 651  * mustlock = Do we have to fight for lock because we otherwise risk an underrun?
 652  * recover = true if the sound device may have been reset and the write
 653  *           position in the device buffer changed
 654  * all_stopped = reports back if all buffers have stopped
 655  *
 656  * Returns:  the length beyond the writepos that was mixed to.
 657  */
 658
 659 static DWORD DSOUND_MixToPrimary(const DirectSoundDevice *device, DWORD writepos, DWORD mixlen, BOOL mustlock, BOOL recover, BOOL *all_stopped)
 660 {
 661         INT i, len;
 662         DWORD minlen = 0;
 663         IDirectSoundBufferImpl  *dsb;
 664         BOOL gotall = TRUE;
 665
 666         /* unless we find a running buffer, all have stopped */
 667         *all_stopped = TRUE;
 668
 669         TRACE("(%d,%d,%d)\n", writepos, mixlen, recover);
 670         for (i = 0; i < device->nrofbuffers; i++) {
 671                 dsb = device->buffers[i];
 672
 673                 TRACE("MixToPrimary for %p, state=%d\n", dsb, dsb->state);
 674
 675                 if (dsb->buflen && dsb->state && !dsb->hwbuf) {
 676                         TRACE("Checking %p, mixlen=%d\n", dsb, mixlen);
 677                         if (!RtlAcquireResourceShared(&dsb->lock, mustlock))
 678                         {
 679                                 gotall = FALSE;
 680                                 continue;
 681                         }
 682                         /* if buffer is stopping it is stopped now */
 683                         if (dsb->state == STATE_STOPPING) {
 684                                 dsb->state = STATE_STOPPED;
 685                                 DSOUND_CheckEvent(dsb, 0, 0);
 686                         } else if (dsb->state != STATE_STOPPED) {
 687
 688                                 /* if recovering, reset the mix position */
 689                                 if ((dsb->state == STATE_STARTING) || recover) {
 690                                         dsb->primary_mixpos = writepos;
 691                                 }
 692
 693                                 /* if the buffer was starting, it must be playing now */
 694                                 if (dsb->state == STATE_STARTING)
 695                                         dsb->state = STATE_PLAYING;
 696
 697                                 /* mix next buffer into the main buffer */
 698                                 len = DSOUND_MixOne(dsb, writepos, mixlen);
 699
 700                                 if (!minlen) minlen = len;
 701
 702                                 /* record the minimum length mixed from all buffers */
 703                                 /* we only want to return the length which *all* buffers have mixed */
 704                                 else if (len) minlen = (len < minlen) ? len : minlen;
 705
 706                                 *all_stopped = FALSE;
 707                         }
 708                         RtlReleaseResource(&dsb->lock);
 709                 }
 710         }
 711
 712         TRACE("Mixed at least %d from all buffers\n", minlen);
 713         if (!gotall) return 0;
 714         return minlen;
 715 }
 716
 717 /**
 718  * Add buffers to the emulated wave device system.
 719  *
 720  * device = The current dsound playback device
 721  * force = If TRUE, the function will buffer up as many frags as possible,
 722  *         even though and will ignore the actual state of the primary buffer.
 723  *
 724  * Returns:  None
 725  */
 726
 727 static void DSOUND_WaveQueue(DirectSoundDevice *device, BOOL force)
 728 {
 729         DWORD prebuf_frags, wave_writepos, wave_fragpos, i;
 730         TRACE("(%p)\n", device);
 731
 732         /* calculate the current wave frag position */
 733         wave_fragpos = (device->pwplay + device->pwqueue) % device->helfrags;
 734
 735         /* calculate the current wave write position */
 736         wave_writepos = wave_fragpos * device->fraglen;
 737
 738         TRACE("wave_fragpos = %i, wave_writepos = %i, pwqueue = %i, prebuf = %i\n",
 739                 wave_fragpos, wave_writepos, device->pwqueue, device->prebuf);
 740
 741         if (!force)
 742         {
 743                 /* check remaining prebuffered frags */
 744                 prebuf_frags = device->mixpos / device->fraglen;
 745                 if (prebuf_frags == device->helfrags)
 746                         --prebuf_frags;
 747                 TRACE("wave_fragpos = %d, mixpos_frags = %d\n", wave_fragpos, prebuf_frags);
 748                 if (prebuf_frags < wave_fragpos)
 749                         prebuf_frags += device->helfrags;
 750                 prebuf_frags -= wave_fragpos;
 751                 TRACE("wanted prebuf_frags = %d\n", prebuf_frags);
 752         }
 753         else
 754                 /* buffer the maximum amount of frags */
 755                 prebuf_frags = device->prebuf;
 756
 757         /* limit to the queue we have left */
 758         if ((prebuf_frags + device->pwqueue) > device->prebuf)
 759                 prebuf_frags = device->prebuf - device->pwqueue;
 760
 761         TRACE("prebuf_frags = %i\n", prebuf_frags);
 762
 763         /* adjust queue */
 764         device->pwqueue += prebuf_frags;
 765
 766         /* get out of CS when calling the wave system */
 767         LeaveCriticalSection(&(device->mixlock));
 768         /* **** */
 769
 770         /* queue up the new buffers */
 771         for(i=0; i<prebuf_frags; i++){
 772                 TRACE("queueing wave buffer %i\n", wave_fragpos);
 773                 waveOutWrite(device->hwo, &device->pwave[wave_fragpos], sizeof(WAVEHDR));
 774                 wave_fragpos++;
 775                 wave_fragpos %= device->helfrags;
 776         }
 777
 778         /* **** */
 779         EnterCriticalSection(&(device->mixlock));
 780
 781         TRACE("queue now = %i\n", device->pwqueue);
 782 }
 783
 784 /**
 785  * Perform mixing for a Direct Sound device. That is, go through all the
 786  * secondary buffers (the sound bites currently playing) and mix them in
 787  * to the primary buffer (the device buffer).
 788  */
 789 static void DSOUND_PerformMix(DirectSoundDevice *device)
 790 {
 791         TRACE("(%p)\n", device);
 792
 793         /* **** */
 794         EnterCriticalSection(&(device->mixlock));
 795
 796         if (device->priolevel != DSSCL_WRITEPRIMARY) {
 797                 BOOL recover = FALSE, all_stopped = FALSE;
 798                 DWORD playpos, writepos, writelead, maxq, frag, prebuff_max, prebuff_left, size1, size2, mixplaypos, mixplaypos2;
 799                 LPVOID buf1, buf2;
 800                 BOOL lock = (device->hwbuf && !(device->drvdesc.dwFlags & DSDDESC_DONTNEEDPRIMARYLOCK));
 801                 BOOL mustlock = FALSE;
 802                 int nfiller;
 803
 804                 /* the sound of silence */
 805                 nfiller = device->pwfx->wBitsPerSample == 8 ? 128 : 0;
 806
 807                 /* get the position in the primary buffer */
 808                 if (DSOUND_PrimaryGetPosition(device, &playpos, &writepos) != 0){
 809                         LeaveCriticalSection(&(device->mixlock));
 810                         return;
 811                 }
 812
 813                 TRACE("primary playpos=%d, writepos=%d, clrpos=%d, mixpos=%d, buflen=%d\n",
 814                       playpos,writepos,device->playpos,device->mixpos,device->buflen);
 815                 assert(device->playpos < device->buflen);
 816
 817                 mixplaypos = DSOUND_bufpos_to_mixpos(device, device->playpos);
 818                 mixplaypos2 = DSOUND_bufpos_to_mixpos(device, playpos);
 819
 820                 /* calc maximum prebuff */
 821                 prebuff_max = (device->prebuf * device->fraglen);
 822                 if (!device->hwbuf && playpos + prebuff_max >= device->helfrags * device->fraglen)
 823                         prebuff_max += device->buflen - device->helfrags * device->fraglen;
 824
 825                 /* check how close we are to an underrun. It occurs when the writepos overtakes the mixpos */
 826                 prebuff_left = DSOUND_BufPtrDiff(device->buflen, device->mixpos, playpos);
 827                 writelead = DSOUND_BufPtrDiff(device->buflen, writepos, playpos);
 828
 829                 /* check for underrun. underrun occurs when the write position passes the mix position
 830                  * also wipe out just-played sound data */
 831                 if((prebuff_left > prebuff_max) || (device->state == STATE_STOPPED) || (device->state == STATE_STARTING)){
 832                         if (device->state == STATE_STOPPING || device->state == STATE_PLAYING)
 833                                 WARN("Probable buffer underrun\n");
 834                         else TRACE("Buffer starting or buffer underrun\n");
 835
 836                         /* recover mixing for all buffers */
 837                         recover = TRUE;
 838
 839                         /* reset mix position to write position */
 840                         device->mixpos = writepos;
 841
 842                         ZeroMemory(device->mix_buffer, device->mix_buffer_len);
 843                         ZeroMemory(device->buffer, device->buflen);
 844                 } else if (playpos < device->playpos) {
 845                         buf1 = device->buffer + device->playpos;
 846                         buf2 = device->buffer;
 847                         size1 = device->buflen - device->playpos;
 848                         size2 = playpos;
 849                         FillMemory(device->mix_buffer + mixplaypos, device->mix_buffer_len - mixplaypos, 0);
 850                         FillMemory(device->mix_buffer, mixplaypos2, 0);
 851                         if (lock)
 852                                 IDsDriverBuffer_Lock(device->hwbuf, &buf1, &size1, &buf2, &size2, device->playpos, size1+size2, 0);
 853                         FillMemory(buf1, size1, nfiller);
 854                         if (playpos && (!buf2 || !size2))
 855                                 FIXME("%d: (%d, %d)=>(%d, %d) There should be an additional buffer here!!\n", __LINE__, device->playpos, device->mixpos, playpos, writepos);
 856                         FillMemory(buf2, size2, nfiller);
 857                         if (lock)
 858                                 IDsDriverBuffer_Unlock(device->hwbuf, buf1, size1, buf2, size2);
 859                 } else {
 860                         buf1 = device->buffer + device->playpos;
 861                         buf2 = NULL;
 862                         size1 = playpos - device->playpos;
 863                         size2 = 0;
 864                         FillMemory(device->mix_buffer + mixplaypos, mixplaypos2 - mixplaypos, 0);
 865                         if (lock)
 866                                 IDsDriverBuffer_Lock(device->hwbuf, &buf1, &size1, &buf2, &size2, device->playpos, size1+size2, 0);
 867                         FillMemory(buf1, size1, nfiller);
 868                         if (buf2 && size2)
 869                         {
 870                                 FIXME("%d: There should be no additional buffer here!!\n", __LINE__);
 871                                 FillMemory(buf2, size2, nfiller);
 872                         }
 873                         if (lock)
 874                                 IDsDriverBuffer_Unlock(device->hwbuf, buf1, size1, buf2, size2);
 875                 }
 876                 device->playpos = playpos;
 877
 878                 /* find the maximum we can prebuffer from current write position */
 879                 maxq = (writelead < prebuff_max) ? (prebuff_max - writelead) : 0;
 880
 881                 TRACE("prebuff_left = %d, prebuff_max = %dx%d=%d, writelead=%d\n",
 882                         prebuff_left, device->prebuf, device->fraglen, prebuff_max, writelead);
 883
 884                 /* Do we risk an 'underrun' if we don't advance pointer? */
 885                 if (writelead/device->fraglen <= ds_snd_queue_min || recover)
 886                         mustlock = TRUE;
 887
 888                 if (lock)
 889                         IDsDriverBuffer_Lock(device->hwbuf, &buf1, &size1, &buf2, &size2, writepos, maxq, 0);
 890
 891                 /* do the mixing */
 892                 frag = DSOUND_MixToPrimary(device, writepos, maxq, mustlock, recover, &all_stopped);
 893
 894                 if (frag + writepos > device->buflen)
 895                 {
 896                         DWORD todo = device->buflen - writepos;
 897                         device->normfunction(device->mix_buffer + DSOUND_bufpos_to_mixpos(device, writepos), device->buffer + writepos, todo);
 898                         device->normfunction(device->mix_buffer, device->buffer, frag - todo);
 899                 }
 900                 else
 901                         device->normfunction(device->mix_buffer + DSOUND_bufpos_to_mixpos(device, writepos), device->buffer + writepos, frag);
 902
 903                 /* update the mix position, taking wrap-around into account */
 904                 device->mixpos = writepos + frag;
 905                 device->mixpos %= device->buflen;
 906
 907                 if (lock)
 908                 {
 909                         DWORD frag2 = (frag > size1 ? frag - size1 : 0);
 910                         frag -= frag2;
 911                         if (frag2 > size2)
 912                         {
 913                                 FIXME("Buffering too much! (%d, %d, %d, %d)\n", maxq, frag, size2, frag2 - size2);
 914                                 frag2 = size2;
 915                         }
 916                         IDsDriverBuffer_Unlock(device->hwbuf, buf1, frag, buf2, frag2);
 917                 }
 918
 919                 /* update prebuff left */
 920                 prebuff_left = DSOUND_BufPtrDiff(device->buflen, device->mixpos, playpos);
 921
 922                 /* check if have a whole fragment */
 923                 if (prebuff_left >= device->fraglen){
 924
 925                         /* update the wave queue if using wave system */
 926                         if (!device->hwbuf)
 927                                 DSOUND_WaveQueue(device, FALSE);
 928
 929                         /* buffers are full. start playing if applicable */
 930                         if(device->state == STATE_STARTING){
 931                                 TRACE("started primary buffer\n");
 932                                 if(DSOUND_PrimaryPlay(device) != DS_OK){
 933                                         WARN("DSOUND_PrimaryPlay failed\n");
 934                                 }
 935                                 else{
 936                                         /* we are playing now */
 937                                         device->state = STATE_PLAYING;
 938                                 }
 939                         }
 940
 941                         /* buffers are full. start stopping if applicable */
 942                         if(device->state == STATE_STOPPED){
 943                                 TRACE("restarting primary buffer\n");
 944                                 if(DSOUND_PrimaryPlay(device) != DS_OK){
 945                                         WARN("DSOUND_PrimaryPlay failed\n");
 946                                 }
 947                                 else{
 948                                         /* start stopping again. as soon as there is no more data, it will stop */
 949                                         device->state = STATE_STOPPING;
 950                                 }
 951                         }
 952                 }
 953
 954                 /* if device was stopping, its for sure stopped when all buffers have stopped */
 955                 else if((all_stopped == TRUE) && (device->state == STATE_STOPPING)){
 956                         TRACE("All buffers have stopped. Stopping primary buffer\n");
 957                         device->state = STATE_STOPPED;
 958
 959                         /* stop the primary buffer now */
 960                         DSOUND_PrimaryStop(device);
 961                 }
 962
 963         } else {
 964
 965                 /* update the wave queue if using wave system */
 966                 if (!device->hwbuf)
 967                         DSOUND_WaveQueue(device, TRUE);
 968                 else
 969                         /* Keep alsa happy, which needs GetPosition called once every 10 ms */
 970                         IDsDriverBuffer_GetPosition(device->hwbuf, NULL, NULL);
 971
 972                 /* in the DSSCL_WRITEPRIMARY mode, the app is totally in charge... */
 973                 if (device->state == STATE_STARTING) {
 974                         if (DSOUND_PrimaryPlay(device) != DS_OK)
 975                                 WARN("DSOUND_PrimaryPlay failed\n");
 976                         else
 977                                 device->state = STATE_PLAYING;
 978                 }
 979                 else if (device->state == STATE_STOPPING) {
 980                         if (DSOUND_PrimaryStop(device) != DS_OK)
 981                                 WARN("DSOUND_PrimaryStop failed\n");
 982                         else
 983                                 device->state = STATE_STOPPED;
 984                 }
 985         }
 986
 987         LeaveCriticalSection(&(device->mixlock));
 988         /* **** */
 989 }
 990
 991 void CALLBACK DSOUND_timer(UINT timerID, UINT msg, DWORD_PTR dwUser,
 992                            DWORD_PTR dw1, DWORD_PTR dw2)
 993 {
 994         DirectSoundDevice * device = (DirectSoundDevice*)dwUser;
 995         DWORD start_time =  GetTickCount();
 996         DWORD end_time;
 997         TRACE("(%d,%d,0x%lx,0x%lx,0x%lx)\n",timerID,msg,dwUser,dw1,dw2);
 998         TRACE("entering at %d\n", start_time);
 999
1000         if (DSOUND_renderer[device->drvdesc.dnDevNode] != device) {
1001                 ERR("dsound died without killing us?\n");
1002                 timeKillEvent(timerID);
1003                 timeEndPeriod(DS_TIME_RES);
1004                 return;
1005         }
1006
1007         RtlAcquireResourceShared(&(device->buffer_list_lock), TRUE);
1008
1009         if (device->ref)
1010                 DSOUND_PerformMix(device);
1011
1012         RtlReleaseResource(&(device->buffer_list_lock));
1013
1014         end_time = GetTickCount();
1015         TRACE("completed processing at %d, duration = %d\n", end_time, end_time - start_time);
1016 }
1017
1018 void CALLBACK DSOUND_callback(HWAVEOUT hwo, UINT msg, DWORD_PTR dwUser, DWORD_PTR dw1, DWORD_PTR dw2)
1019 {
1020         DirectSoundDevice * device = (DirectSoundDevice*)dwUser;
1021         TRACE("(%p,%x,%lx,%lx,%lx)\n",hwo,msg,dwUser,dw1,dw2);
1022         TRACE("entering at %d, msg=%08x(%s)\n", GetTickCount(), msg,
1023                 msg==MM_WOM_DONE ? "MM_WOM_DONE" : msg==MM_WOM_CLOSE ? "MM_WOM_CLOSE" :
1024                 msg==MM_WOM_OPEN ? "MM_WOM_OPEN" : "UNKNOWN");
1025
1026         /* check if packet completed from wave driver */
1027         if (msg == MM_WOM_DONE) {
1028
1029                 /* **** */
1030                 EnterCriticalSection(&(device->mixlock));
1031
1032                 TRACE("done playing primary pos=%d\n", device->pwplay * device->fraglen);
1033
1034                 /* update playpos */
1035                 device->pwplay++;
1036                 device->pwplay %= device->helfrags;
1037
1038                 /* sanity */
1039                 if(device->pwqueue == 0){
1040                         ERR("Wave queue corrupted!\n");
1041                 }
1042
1043                 /* update queue */
1044                 device->pwqueue--;
1045
1046                 LeaveCriticalSection(&(device->mixlock));
1047                 /* **** */
1048         }
1049         TRACE("completed\n");
1050 }