3 * Copyright 1998 Marcus Meissner
4 * Copyright 1998 Rob Riggs
5 * Copyright 2000-2002 TransGaming Technologies, Inc.
6 * Copyright 2007 Peter Dons Tychsen
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
25 #include <math.h> /* Insomnia - pow() function */
27 #define NONAMELESSSTRUCT
28 #define NONAMELESSUNION
34 #include "wine/debug.h"
37 #include "dsound_private.h"
39 WINE_DEFAULT_DEBUG_CHANNEL(dsound);
41 void DSOUND_RecalcVolPan(PDSVOLUMEPAN volpan)
44 TRACE("(%p)\n",volpan);
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 */
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);
57 TRACE("left = %x, right = %x\n", volpan->dwTotalLeftAmpFactor, volpan->dwTotalRightAmpFactor);
60 void DSOUND_AmpFactorToVolPan(PDSVOLUMEPAN volpan)
63 TRACE("(%p)\n",volpan);
65 TRACE("left=%x, right=%x\n",volpan->dwTotalLeftAmpFactor,volpan->dwTotalRightAmpFactor);
66 if (volpan->dwTotalLeftAmpFactor==0)
69 left=600 * log(((double)volpan->dwTotalLeftAmpFactor) / 0xffff) / log(2);
70 if (volpan->dwTotalRightAmpFactor==0)
73 right=600 * log(((double)volpan->dwTotalRightAmpFactor) / 0xffff) / log(2);
76 volpan->lVolume=right;
77 volpan->dwVolAmpFactor=volpan->dwTotalRightAmpFactor;
82 volpan->dwVolAmpFactor=volpan->dwTotalLeftAmpFactor;
84 if (volpan->lVolume < -10000)
85 volpan->lVolume=-10000;
86 volpan->lPan=right-left;
87 if (volpan->lPan < -10000)
90 TRACE("Vol=%d Pan=%d\n", volpan->lVolume, volpan->lPan);
93 void DSOUND_RecalcFormat(IDirectSoundBufferImpl *dsb)
97 /* calculate the 10ms write lead */
98 dsb->writelead = (dsb->freq / 100) * dsb->pwfx->nBlockAlign;
102 * Check for application callback requests for when the play position
103 * reaches certain points.
105 * The offsets that will be triggered will be those between the recorded
106 * "last played" position for the buffer (i.e. dsb->playpos) and "len" bytes
107 * beyond that position.
109 void DSOUND_CheckEvent(IDirectSoundBufferImpl *dsb, int len)
113 LPDSBPOSITIONNOTIFY event;
114 TRACE("(%p,%d)\n",dsb,len);
116 if (dsb->nrofnotifies == 0)
119 TRACE("(%p) buflen = %d, playpos = %d, len = %d\n",
120 dsb, dsb->buflen, dsb->playpos, len);
121 for (i = 0; i < dsb->nrofnotifies ; i++) {
122 event = dsb->notifies + i;
123 offset = event->dwOffset;
124 TRACE("checking %d, position %d, event = %p\n",
125 i, offset, event->hEventNotify);
126 /* DSBPN_OFFSETSTOP has to be the last element. So this is */
127 /* OK. [Inside DirectX, p274] */
129 /* This also means we can't sort the entries by offset, */
130 /* because DSBPN_OFFSETSTOP == -1 */
131 if (offset == DSBPN_OFFSETSTOP) {
132 if (dsb->state == STATE_STOPPED) {
133 SetEvent(event->hEventNotify);
134 TRACE("signalled event %p (%d)\n", event->hEventNotify, i);
139 if ((dsb->playpos + len) >= dsb->buflen) {
140 if ((offset < ((dsb->playpos + len) % dsb->buflen)) ||
141 (offset >= dsb->playpos)) {
142 TRACE("signalled event %p (%d)\n", event->hEventNotify, i);
143 SetEvent(event->hEventNotify);
146 if ((offset >= dsb->playpos) && (offset < (dsb->playpos + len))) {
147 TRACE("signalled event %p (%d)\n", event->hEventNotify, i);
148 SetEvent(event->hEventNotify);
154 /* WAV format info can be found at:
156 * http://www.cwi.nl/ftp/audio/AudioFormats.part2
157 * ftp://ftp.cwi.nl/pub/audio/RIFF-format
159 * Import points to remember:
160 * 8-bit WAV is unsigned
161 * 16-bit WAV is signed
163 /* Use the same formulas as pcmconverter.c */
164 static inline INT16 cvtU8toS16(BYTE b)
166 return (short)((b+(b << 8))-32768);
169 static inline BYTE cvtS16toU8(INT16 s)
171 return (s >> 8) ^ (unsigned char)0x80;
175 * Copy a single frame from the given input buffer to the given output buffer.
176 * Translate 8 <-> 16 bits and mono <-> stereo
178 static inline void cp_fields(const IDirectSoundBufferImpl *dsb, const BYTE *ibuf, BYTE *obuf )
180 DirectSoundDevice * device = dsb->device;
183 if (dsb->pwfx->wBitsPerSample == 8) {
184 if (device->pwfx->wBitsPerSample == 8 &&
185 device->pwfx->nChannels == dsb->pwfx->nChannels) {
186 /* avoid needless 8->16->8 conversion */
188 if (dsb->pwfx->nChannels==2)
192 fl = cvtU8toS16(*ibuf);
193 fr = (dsb->pwfx->nChannels==2 ? cvtU8toS16(*(ibuf + 1)) : fl);
195 fl = *((const INT16 *)ibuf);
196 fr = (dsb->pwfx->nChannels==2 ? *(((const INT16 *)ibuf) + 1) : fl);
199 if (device->pwfx->nChannels == 2) {
200 if (device->pwfx->wBitsPerSample == 8) {
201 *obuf = cvtS16toU8(fl);
202 *(obuf + 1) = cvtS16toU8(fr);
205 if (device->pwfx->wBitsPerSample == 16) {
206 *((INT16 *)obuf) = fl;
207 *(((INT16 *)obuf) + 1) = fr;
211 if (device->pwfx->nChannels == 1) {
213 if (device->pwfx->wBitsPerSample == 8) {
214 *obuf = cvtS16toU8(fl);
217 if (device->pwfx->wBitsPerSample == 16) {
218 *((INT16 *)obuf) = fl;
225 * Mix at most the given amount of data into the given device buffer from the
226 * given secondary buffer, starting from the dsb's first currently unmixed
227 * frame (buf_mixpos), translating frequency (pitch), stereo/mono and
228 * bits-per-sample. The secondary buffer sample is looped if it is not
229 * long enough and it is a looping buffer.
230 * (Doesn't perform any mixing - this is a straight copy operation).
232 * Now with PerfectPitch (tm) technology
234 * dsb = the secondary buffer
235 * buf = the device buffer
236 * len = number of bytes to store in the device buffer
238 * Returns: the number of bytes read from the secondary buffer
239 * (ie. len, adjusted for frequency, number of channels and sample size,
240 * and limited by buffer length for non-looping buffers)
242 static INT DSOUND_MixerNorm(IDirectSoundBufferImpl *dsb, BYTE *buf, INT len)
244 INT i, size, ipos, ilen;
246 INT iAdvance = dsb->pwfx->nBlockAlign;
247 INT oAdvance = dsb->device->pwfx->nBlockAlign;
249 ibp = dsb->buffer->memory + dsb->buf_mixpos;
252 TRACE("(%p, %p, %p), buf_mixpos=%d\n", dsb, ibp, obp, dsb->buf_mixpos);
253 /* Check for the best case */
254 if ((dsb->freq == dsb->device->pwfx->nSamplesPerSec) &&
255 (dsb->pwfx->wBitsPerSample == dsb->device->pwfx->wBitsPerSample) &&
256 (dsb->pwfx->nChannels == dsb->device->pwfx->nChannels)) {
257 INT bytesleft = dsb->buflen - dsb->buf_mixpos;
258 TRACE("(%p) Best case\n", dsb);
259 if (len <= bytesleft )
260 CopyMemory(obp, ibp, len);
262 CopyMemory(obp, ibp, bytesleft);
263 CopyMemory(obp + bytesleft, dsb->buffer->memory, len - bytesleft);
268 /* Check for same sample rate */
269 if (dsb->freq == dsb->device->pwfx->nSamplesPerSec) {
270 TRACE("(%p) Same sample rate %d = primary %d\n", dsb,
271 dsb->freq, dsb->device->pwfx->nSamplesPerSec);
273 for (i = 0; i < len; i += oAdvance) {
274 cp_fields(dsb, ibp, obp );
278 if (ibp >= (BYTE *)(dsb->buffer->memory + dsb->buflen))
279 ibp = dsb->buffer->memory; /* wrap */
284 /* Mix in different sample rates */
286 /* New PerfectPitch(tm) Technology (c) 1998 Rob Riggs */
287 /* Patent Pending :-] */
289 /* Patent enhancements (c) 2000 Ove KÃ¥ven,
290 * TransGaming Technologies Inc. */
292 /* FIXME("(%p) Adjusting frequency: %ld -> %ld (need optimization)\n",
293 dsb, dsb->freq, dsb->device->pwfx->nSamplesPerSec); */
295 size = len / oAdvance;
297 ipos = dsb->buf_mixpos;
298 for (i = 0; i < size; i++) {
299 cp_fields(dsb, (dsb->buffer->memory + ipos), obp);
301 dsb->freqAcc += dsb->freqAdjust;
302 if (dsb->freqAcc >= (1<<DSOUND_FREQSHIFT)) {
303 ULONG adv = (dsb->freqAcc>>DSOUND_FREQSHIFT) * iAdvance;
304 dsb->freqAcc &= (1<<DSOUND_FREQSHIFT)-1;
305 ipos += adv; ilen += adv;
312 static void DSOUND_MixerVol(IDirectSoundBufferImpl *dsb, BYTE *buf, INT len)
316 INT16 *bps = (INT16 *) buf;
318 TRACE("(%p,%p,%d)\n",dsb,buf,len);
319 TRACE("left = %x, right = %x\n", dsb->volpan.dwTotalLeftAmpFactor,
320 dsb->volpan.dwTotalRightAmpFactor);
322 if ((!(dsb->dsbd.dwFlags & DSBCAPS_CTRLPAN) || (dsb->volpan.lPan == 0)) &&
323 (!(dsb->dsbd.dwFlags & DSBCAPS_CTRLVOLUME) || (dsb->volpan.lVolume == 0)) &&
324 !(dsb->dsbd.dwFlags & DSBCAPS_CTRL3D))
325 return; /* Nothing to do */
327 /* If we end up with some bozo coder using panning or 3D sound */
328 /* with a mono primary buffer, it could sound very weird using */
329 /* this method. Oh well, tough patooties. */
331 switch (dsb->device->pwfx->wBitsPerSample) {
333 /* 8-bit WAV is unsigned, but we need to operate */
334 /* on signed data for this to work properly */
335 switch (dsb->device->pwfx->nChannels) {
337 for (i = 0; i < len; i++) {
338 INT val = *bpc - 128;
339 val = (val * dsb->volpan.dwTotalLeftAmpFactor) >> 16;
345 for (i = 0; i < len; i+=2) {
346 INT val = *bpc - 128;
347 val = (val * dsb->volpan.dwTotalLeftAmpFactor) >> 16;
350 val = (val * dsb->volpan.dwTotalRightAmpFactor) >> 16;
356 FIXME("doesn't support %d channels\n", dsb->device->pwfx->nChannels);
361 /* 16-bit WAV is signed -- much better */
362 switch (dsb->device->pwfx->nChannels) {
364 for (i = 0; i < len; i += 2) {
365 *bps = (*bps * dsb->volpan.dwTotalLeftAmpFactor) >> 16;
370 for (i = 0; i < len; i += 4) {
371 *bps = (*bps * dsb->volpan.dwTotalLeftAmpFactor) >> 16;
373 *bps = (*bps * dsb->volpan.dwTotalRightAmpFactor) >> 16;
378 FIXME("doesn't support %d channels\n", dsb->device->pwfx->nChannels);
383 FIXME("doesn't support %d bit samples\n", dsb->device->pwfx->wBitsPerSample);
389 * Make sure the device's tmp_buffer is at least the given size. Return a
392 static LPBYTE DSOUND_tmpbuffer(DirectSoundDevice *device, DWORD len)
394 TRACE("(%p,%d)\n", device, len);
396 if (len > device->tmp_buffer_len) {
397 if (device->tmp_buffer)
398 device->tmp_buffer = HeapReAlloc(GetProcessHeap(), 0, device->tmp_buffer, len);
400 device->tmp_buffer = HeapAlloc(GetProcessHeap(), 0, len);
402 device->tmp_buffer_len = len;
405 return device->tmp_buffer;
409 * Mix (at most) the given number of bytes into the given position of the
410 * device buffer, from the secondary buffer "dsb" (starting at the current
411 * mix position for that buffer).
413 * Returns the number of bytes actually mixed into the device buffer. This
414 * will match fraglen unless the end of the secondary buffer is reached
415 * (and it is not looping).
417 * dsb = the secondary buffer to mix from
418 * writepos = position (offset) in device buffer to write at
419 * fraglen = number of bytes to mix
421 static DWORD DSOUND_MixInBuffer(IDirectSoundBufferImpl *dsb, DWORD writepos, DWORD fraglen)
423 INT i, len, ilen, field, todo;
426 TRACE("(%p,%d,%d)\n",dsb,writepos,fraglen);
429 if (!(dsb->playflags & DSBPLAY_LOOPING)) {
430 /* This buffer is not looping, so make sure the requested
431 * length will not take us past the end of the buffer */
432 int secondary_remainder = dsb->buflen - dsb->buf_mixpos;
433 int adjusted_remainder = MulDiv(dsb->device->pwfx->nAvgBytesPerSec, secondary_remainder, dsb->nAvgBytesPerSec);
434 assert(adjusted_remainder >= 0);
435 /* The adjusted remainder must be at least one sample,
436 * otherwise we will never reach the end of the
437 * secondary buffer, as there will perpetually be a
438 * fractional remainder */
439 TRACE("secondary_remainder = %d, adjusted_remainder = %d, len = %d\n", secondary_remainder, adjusted_remainder, len);
440 if (adjusted_remainder < len) {
441 TRACE("clipping len to remainder of secondary buffer\n");
442 len = adjusted_remainder;
448 if (len % dsb->device->pwfx->nBlockAlign) {
449 INT nBlockAlign = dsb->device->pwfx->nBlockAlign;
450 ERR("length not a multiple of block size, len = %d, block size = %d\n", len, nBlockAlign);
451 len -= len % nBlockAlign; /* data alignment */
454 /* Create temp buffer to hold actual resulting data */
455 if ((buf = ibuf = DSOUND_tmpbuffer(dsb->device, len)) == NULL)
458 TRACE("MixInBuffer (%p) len = %d, dest = %d\n", dsb, len, writepos);
460 /* first, copy the data from the DirectSoundBuffer into the temporary
461 buffer, translating frequency/bits-per-sample/number-of-channels
462 to match the device settings */
463 ilen = DSOUND_MixerNorm(dsb, ibuf, len);
465 /* then apply the correct volume, if necessary */
466 if ((dsb->dsbd.dwFlags & DSBCAPS_CTRLPAN) ||
467 (dsb->dsbd.dwFlags & DSBCAPS_CTRLVOLUME) ||
468 (dsb->dsbd.dwFlags & DSBCAPS_CTRL3D))
469 DSOUND_MixerVol(dsb, ibuf, len);
471 /* Now mix the temporary buffer into the devices main buffer */
472 if (dsb->device->pwfx->wBitsPerSample == 8) {
473 BYTE *obuf = dsb->device->buffer + writepos;
475 if ((writepos + len) <= dsb->device->buflen)
478 todo = dsb->device->buflen - writepos;
480 for (i = 0; i < todo; i++) {
481 /* 8-bit WAV is unsigned */
482 field = (*ibuf++ - 128);
483 field += (*obuf - 128);
484 if (field > 127) field = 127;
485 else if (field < -128) field = -128;
486 *obuf++ = field + 128;
491 obuf = dsb->device->buffer;
493 for (i = 0; i < todo; i++) {
494 /* 8-bit WAV is unsigned */
495 field = (*ibuf++ - 128);
496 field += (*obuf - 128);
497 if (field > 127) field = 127;
498 else if (field < -128) field = -128;
499 *obuf++ = field + 128;
503 INT16 *ibufs, *obufs;
505 ibufs = (INT16 *) ibuf;
506 obufs = (INT16 *)(dsb->device->buffer + writepos);
508 if ((writepos + len) <= dsb->device->buflen)
511 todo = (dsb->device->buflen - writepos) / 2;
513 for (i = 0; i < todo; i++) {
514 /* 16-bit WAV is signed */
517 if (field > 32767) field = 32767;
518 else if (field < -32768) field = -32768;
522 if (todo < (len / 2)) {
523 todo = (len / 2) - todo;
524 obufs = (INT16 *)dsb->device->buffer;
526 for (i = 0; i < todo; i++) {
527 /* 16-bit WAV is signed */
530 if (field > 32767) field = 32767;
531 else if (field < -32768) field = -32768;
537 if (dsb->leadin && (dsb->startpos > dsb->buf_mixpos) && (dsb->startpos <= dsb->buf_mixpos + ilen)) {
538 /* HACK... leadin should be reset when the PLAY position reaches the startpos,
539 * not the MIX position... but if the sound buffer is bigger than our prebuffering
540 * (which must be the case for the streaming buffers that need this hack anyway)
541 * plus DS_HEL_MARGIN or equivalent, then this ought to work anyway. */
545 dsb->buf_mixpos += ilen;
547 if (dsb->buf_mixpos >= dsb->buflen) {
548 if (dsb->playflags & DSBPLAY_LOOPING) {
550 dsb->buf_mixpos %= dsb->buflen;
551 if (dsb->leadin && (dsb->startpos <= dsb->buf_mixpos))
552 dsb->leadin = FALSE; /* HACK: see above */
553 } else if (dsb->buf_mixpos > dsb->buflen) {
554 ERR("Mixpos (%u) past buflen (%u), capping...\n", dsb->buf_mixpos, dsb->buflen);
555 dsb->buf_mixpos = dsb->buflen;
563 * Calculate the distance between two buffer offsets, taking wraparound
566 static inline DWORD DSOUND_BufPtrDiff(DWORD buflen, DWORD ptr1, DWORD ptr2)
571 return buflen + ptr1 - ptr2;
576 * Mix some frames from the given secondary buffer "dsb" into the device
579 * dsb = the secondary buffer
580 * playpos = the current play position in the device buffer (primary buffer)
581 * writepos = the current safe-to-write position in the device buffer
582 * mixlen = the maximum number of bytes in the primary buffer to mix, from the
585 * Returns: the number of bytes beyond the writepos that were mixed.
587 static DWORD DSOUND_MixOne(IDirectSoundBufferImpl *dsb, DWORD playpos, DWORD writepos, DWORD mixlen)
589 /* The buffer's primary_mixpos may be before or after the the device
590 * buffer's mixpos, but both must be ahead of writepos. */
593 TRACE("(%p,%d,%d,%d)\n",dsb,playpos,writepos,mixlen);
594 TRACE("writepos=%d, buf_mixpos=%d, primary_mixpos=%d, mixlen=%d\n", writepos, dsb->buf_mixpos, dsb->primary_mixpos, mixlen);
595 TRACE("looping=%d, startpos=%d, leadin=%d, buflen=%d\n", dsb->playflags, dsb->startpos, dsb->leadin, dsb->buflen);
597 /* check for notification positions */
598 if (dsb->dsbd.dwFlags & DSBCAPS_CTRLPOSITIONNOTIFY &&
599 dsb->state != STATE_STARTING) {
600 DSOUND_CheckEvent(dsb, mixlen);
603 /* save write position for non-GETCURRENTPOSITION2... */
604 dsb->playpos = writepos;
606 /* calculate how much pre-buffering has already been done for this buffer */
607 primary_done = DSOUND_BufPtrDiff(dsb->device->buflen, dsb->primary_mixpos, writepos);
610 if(mixlen < primary_done)
612 /* Should *NEVER* happen */
613 ERR("Fatal error. Under/Overflow? primary_done=%d, mixpos=%d, primary_mixpos=%d, writepos=%d, playpos=%d\n", primary_done,dsb->buf_mixpos,dsb->primary_mixpos, writepos, playpos);
617 /* take into acount already mixed data */
618 mixlen = mixlen - primary_done;
620 TRACE("mixlen (primary) = %i\n", mixlen);
622 /* clip to valid length */
623 mixlen = (dsb->buflen < mixlen) ? dsb->buflen : mixlen;
625 TRACE("primary_done=%d, mixlen (buffer)=%d\n", primary_done, mixlen);
628 mixlen = DSOUND_MixInBuffer(dsb, dsb->primary_mixpos, mixlen);
630 /* increase mix position */
631 dsb->primary_mixpos += mixlen;
632 dsb->primary_mixpos %= dsb->device->buflen;
634 TRACE("new primary_mixpos=%d, mixed data len=%d, buffer left = %d\n",
635 dsb->primary_mixpos, mixlen, (dsb->buflen - dsb->buf_mixpos));
637 /* re-calculate the primary done */
638 primary_done = DSOUND_BufPtrDiff(dsb->device->buflen, dsb->primary_mixpos, writepos);
640 /* check if buffer should be considered complete */
641 if (((dsb->buflen - dsb->buf_mixpos) < dsb->writelead) &&
642 !(dsb->playflags & DSBPLAY_LOOPING)) {
644 TRACE("Buffer reached end. Stopped\n");
646 dsb->state = STATE_STOPPED;
650 DSOUND_CheckEvent(dsb, mixlen);
653 /* Report back the total prebuffered amount for this buffer */
658 * For a DirectSoundDevice, go through all the currently playing buffers and
659 * mix them in to the device buffer.
661 * playpos = the current play position in the primary buffer
662 * writepos = the current safe-to-write position in the primary buffer
663 * mixlen = the maximum amount to mix into the primary buffer
664 * (beyond the current writepos)
665 * recover = true if the sound device may have been reset and the write
666 * position in the device buffer changed
667 * all_stopped = reports back if all buffers have stopped
669 * Returns: the length beyond the writepos that was mixed to.
672 static DWORD DSOUND_MixToPrimary(const DirectSoundDevice *device, DWORD playpos, DWORD writepos,
673 DWORD mixlen, BOOL recover, BOOL *all_stopped)
677 IDirectSoundBufferImpl *dsb;
679 /* unless we find a running buffer, all have stopped */
682 TRACE("(%d,%d,%d,%d)\n", playpos, writepos, mixlen, recover);
683 for (i = 0; i < device->nrofbuffers; i++) {
684 dsb = device->buffers[i];
686 TRACE("MixToPrimary for %p, state=%d\n", dsb, dsb->state);
688 if (dsb->buflen && dsb->state && !dsb->hwbuf) {
689 TRACE("Checking %p, mixlen=%d\n", dsb, mixlen);
690 EnterCriticalSection(&(dsb->lock));
692 /* if buffer is stopping it is stopped now */
693 if (dsb->state == STATE_STOPPING) {
694 dsb->state = STATE_STOPPED;
695 DSOUND_CheckEvent(dsb, 0);
698 /* if recovering, reset the mix position */
699 if ((dsb->state == STATE_STARTING) || recover) {
700 dsb->primary_mixpos = writepos;
703 /* mix next buffer into the main buffer */
704 len = DSOUND_MixOne(dsb, playpos, writepos, mixlen);
706 /* if the buffer was starting, it must be playing now */
707 if (dsb->state == STATE_STARTING)
708 dsb->state = STATE_PLAYING;
710 /* check if min-len should be initialized */
711 if(minlen == 0) minlen = len;
713 /* record the minimum length mixed from all buffers */
714 /* we only want to return the length which *all* buffers have mixed */
715 if(len != 0) minlen = (len < minlen) ? len : minlen;
718 if(dsb->state != STATE_STOPPED){
719 *all_stopped = FALSE;
722 LeaveCriticalSection(&(dsb->lock));
726 TRACE("Mixed at least %d from all buffers\n", minlen);
732 * Add buffers to the emulated wave device system.
734 * device = The current dsound playback device
735 * force = If TRUE, the function will buffer up as many frags as possible,
736 * even though and will ignore the actual state of the primary buffer.
741 static void DSOUND_WaveQueue(DirectSoundDevice *device, BOOL force)
743 DWORD prebuf_frags, wave_writepos, wave_fragpos, i;
744 TRACE("(%p)\n", device);
746 /* calculate the current wave frag position */
747 wave_fragpos = (device->pwplay + device->pwqueue) % DS_HEL_FRAGS;
749 /* calculte the current wave write position */
750 wave_writepos = wave_fragpos * device->fraglen;
752 TRACE("wave_fragpos = %i, wave_writepos = %i, pwqueue = %i, ds_hel_queue= %i\n",
753 wave_fragpos, wave_writepos, device->pwqueue, ds_hel_queue);
756 /* check remaining prebuffered frags */
757 prebuf_frags = DSOUND_BufPtrDiff(device->buflen, device->mixpos, wave_writepos);
758 prebuf_frags = prebuf_frags / device->fraglen;
761 /* buffer the maximum amount of frags */
762 prebuf_frags = device->prebuf;
765 /* limit to the queue we have left */
766 if((prebuf_frags + device->pwqueue) > device->prebuf)
767 prebuf_frags = device->prebuf - device->pwqueue;
769 TRACE("prebuf_frags = %i\n", prebuf_frags);
772 device->pwqueue += prebuf_frags;
774 /* get out of CS when calling the wave system */
775 LeaveCriticalSection(&(device->mixlock));
778 /* queue up the new buffers */
779 for(i=0; i<prebuf_frags; i++){
780 TRACE("queueing wave buffer %i\n", wave_fragpos);
781 waveOutWrite(device->hwo, device->pwave[wave_fragpos], sizeof(WAVEHDR));
783 wave_fragpos %= DS_HEL_FRAGS;
787 EnterCriticalSection(&(device->mixlock));
789 TRACE("queue now = %i\n", device->pwqueue);
793 * Perform mixing for a Direct Sound device. That is, go through all the
794 * secondary buffers (the sound bites currently playing) and mix them in
795 * to the primary buffer (the device buffer).
797 static void DSOUND_PerformMix(DirectSoundDevice *device)
800 TRACE("(%p)\n", device);
803 EnterCriticalSection(&(device->mixlock));
805 if (device->priolevel != DSSCL_WRITEPRIMARY) {
806 BOOL recover = FALSE, all_stopped = FALSE;
807 DWORD playpos, writepos, writelead, maxq, frag, prebuff_max, prebuff_left, size1, size2;
809 BOOL lock = (device->hwbuf && !(device->drvdesc.dwFlags & DSDDESC_DONTNEEDPRIMARYLOCK));
812 /* the sound of silence */
813 nfiller = device->pwfx->wBitsPerSample == 8 ? 128 : 0;
815 /* get the position in the primary buffer */
816 if (DSOUND_PrimaryGetPosition(device, &playpos, &writepos) != 0){
817 LeaveCriticalSection(&(device->mixlock));
821 TRACE("primary playpos=%d, writepos=%d, clrpos=%d, mixpos=%d, buflen=%d\n",
822 playpos,writepos,device->playpos,device->mixpos,device->buflen);
823 assert(device->playpos < device->buflen);
825 /* wipe out just-played sound data */
826 if (playpos < device->playpos) {
827 buf1 = device->buffer + device->playpos;
828 buf2 = device->buffer;
829 size1 = device->buflen - device->playpos;
832 IDsDriverBuffer_Lock(device->hwbuf, &buf1, &size1, &buf2, &size2, device->playpos, size1+size2, 0);
833 FillMemory(buf1, size1, nfiller);
834 if (playpos && (!buf2 || !size2))
835 FIXME("%d: (%d, %d)=>(%d, %d) There should be an additional buffer here!!\n", __LINE__, device->playpos, device->mixpos, playpos, writepos);
836 FillMemory(buf2, size2, nfiller);
838 IDsDriverBuffer_Unlock(device->hwbuf, buf1, size1, buf2, size2);
840 buf1 = device->buffer + device->playpos;
842 size1 = playpos - device->playpos;
845 IDsDriverBuffer_Lock(device->hwbuf, &buf1, &size1, &buf2, &size2, device->playpos, size1+size2, 0);
846 FillMemory(buf1, size1, nfiller);
849 FIXME("%d: There should be no additional buffer here!!\n", __LINE__);
850 FillMemory(buf2, size2, nfiller);
853 IDsDriverBuffer_Unlock(device->hwbuf, buf1, size1, buf2, size2);
855 device->playpos = playpos;
857 /* calc maximum prebuff */
858 prebuff_max = (device->prebuf * device->fraglen);
860 /* check how close we are to an underrun. It occurs when the writepos overtakes the mixpos */
861 prebuff_left = DSOUND_BufPtrDiff(device->buflen, device->mixpos, playpos);
863 writelead = DSOUND_BufPtrDiff(device->buflen, writepos, playpos);
865 /* find the maximum we can prebuffer from current write position */
866 maxq = prebuff_max - prebuff_left;
867 maxq = (writelead < prebuff_max) ? (prebuff_max - writelead) : 0;
869 TRACE("prebuff_left = %d, prebuff_max = %dx%d=%d, writelead=%d\n",
870 prebuff_left, device->prebuf, device->fraglen, prebuff_max, writelead);
872 /* check for underrun. underrun occurs when the write position passes the mix position */
873 if((prebuff_left > prebuff_max) || (device->state == STATE_STOPPED) || (device->state == STATE_STARTING)){
874 TRACE("Buffer starting or buffer underrun\n");
876 /* recover mixing for all buffers */
879 /* reset mix position to write position */
880 device->mixpos = writepos;
884 IDsDriverBuffer_Lock(device->hwbuf, &buf1, &size1, &buf2, &size2, device->mixpos, maxq, 0);
887 frag = DSOUND_MixToPrimary(device, playpos, writepos, maxq, recover, &all_stopped);
889 /* update the mix position, taking wrap-around into acount */
890 device->mixpos = writepos + frag;
891 device->mixpos %= device->buflen;
895 DWORD frag2 = (frag > size1 ? frag - size1 : 0);
899 FIXME("Buffering too much! (%d, %d, %d, %d)\n", maxq, frag, size2, frag2 - size2);
902 IDsDriverBuffer_Unlock(device->hwbuf, buf1, frag, buf2, frag2);
905 /* update prebuff left */
906 prebuff_left = DSOUND_BufPtrDiff(device->buflen, device->mixpos, playpos);
908 /* check if have a whole fragment */
909 if (prebuff_left >= device->fraglen){
911 /* update the wave queue if using wave system */
912 if(device->hwbuf == NULL){
913 DSOUND_WaveQueue(device,TRUE);
916 /* buffers are full. start playing if applicable */
917 if(device->state == STATE_STARTING){
918 TRACE("started primary buffer\n");
919 if(DSOUND_PrimaryPlay(device) != DS_OK){
920 WARN("DSOUND_PrimaryPlay failed\n");
923 /* we are playing now */
924 device->state = STATE_PLAYING;
928 /* buffers are full. start stopping if applicable */
929 if(device->state == STATE_STOPPED){
930 TRACE("restarting primary buffer");
931 if(DSOUND_PrimaryPlay(device) != DS_OK){
932 WARN("DSOUND_PrimaryPlay failed\n");
935 /* start stopping again. as soon as there is no more data, it will stop */
936 device->state = STATE_STOPPING;
941 /* if device was stopping, its for sure stopped when all buffers have stopped */
942 else if((all_stopped == TRUE) && (device->state == STATE_STOPPING)){
943 TRACE("All buffers have stopped. Stopping primary buffer\n");
944 device->state = STATE_STOPPED;
946 /* stop the primary buffer now */
947 DSOUND_PrimaryStop(device);
952 /* update the wave queue if using wave system */
953 if(device->hwbuf == NULL){
954 DSOUND_WaveQueue(device, TRUE);
957 /* in the DSSCL_WRITEPRIMARY mode, the app is totally in charge... */
958 if (device->state == STATE_STARTING) {
959 if (DSOUND_PrimaryPlay(device) != DS_OK)
960 WARN("DSOUND_PrimaryPlay failed\n");
962 device->state = STATE_PLAYING;
964 else if (device->state == STATE_STOPPING) {
965 if (DSOUND_PrimaryStop(device) != DS_OK)
966 WARN("DSOUND_PrimaryStop failed\n");
968 device->state = STATE_STOPPED;
972 LeaveCriticalSection(&(device->mixlock));
976 void CALLBACK DSOUND_timer(UINT timerID, UINT msg, DWORD_PTR dwUser,
977 DWORD_PTR dw1, DWORD_PTR dw2)
979 DirectSoundDevice * device = (DirectSoundDevice*)dwUser;
980 DWORD start_time = GetTickCount();
982 TRACE("(%d,%d,0x%lx,0x%lx,0x%lx)\n",timerID,msg,dwUser,dw1,dw2);
983 TRACE("entering at %d\n", start_time);
985 if (DSOUND_renderer[device->drvdesc.dnDevNode] != device) {
986 ERR("dsound died without killing us?\n");
987 timeKillEvent(timerID);
988 timeEndPeriod(DS_TIME_RES);
992 RtlAcquireResourceShared(&(device->buffer_list_lock), TRUE);
995 DSOUND_PerformMix(device);
997 RtlReleaseResource(&(device->buffer_list_lock));
999 end_time = GetTickCount();
1000 TRACE("completed processing at %d, duration = %d\n", end_time, end_time - start_time);
1003 void CALLBACK DSOUND_callback(HWAVEOUT hwo, UINT msg, DWORD dwUser, DWORD dw1, DWORD dw2)
1005 DirectSoundDevice * device = (DirectSoundDevice*)dwUser;
1006 TRACE("(%p,%x,%x,%x,%x)\n",hwo,msg,dwUser,dw1,dw2);
1007 TRACE("entering at %d, msg=%08x(%s)\n", GetTickCount(), msg,
1008 msg==MM_WOM_DONE ? "MM_WOM_DONE" : msg==MM_WOM_CLOSE ? "MM_WOM_CLOSE" :
1009 msg==MM_WOM_OPEN ? "MM_WOM_OPEN" : "UNKNOWN");
1011 /* check if packet completed from wave driver */
1012 if (msg == MM_WOM_DONE) {
1015 EnterCriticalSection(&(device->mixlock));
1017 TRACE("done playing primary pos=%d\n", device->pwplay * device->fraglen);
1019 /* update playpos */
1021 device->pwplay %= DS_HEL_FRAGS;
1024 if(device->pwqueue == 0){
1025 ERR("Wave queue corrupted!\n");
1031 LeaveCriticalSection(&(device->mixlock));
1034 TRACE("completed\n");