deferwindowpos commit
[wine/wine64.git] / dlls / dsound / mixer.c
blob3bcbce02f7d294075d77d2215d62052247d17487
1 /* DirectSound
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
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.
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.
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
24 #include <assert.h>
25 #include <stdarg.h>
26 #include <math.h> /* Insomnia - pow() function */
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"
39 WINE_DEFAULT_DEBUG_CHANNEL(dsound);
41 void DSOUND_RecalcVolPan(PDSVOLUMEPAN volpan)
43 double temp;
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)
62 double left,right;
63 TRACE("(%p)\n",volpan);
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)
76 volpan->lVolume=right;
77 volpan->dwVolAmpFactor=volpan->dwTotalRightAmpFactor;
79 else
81 volpan->lVolume=left;
82 volpan->dwVolAmpFactor=volpan->dwTotalLeftAmpFactor;
84 if (volpan->lVolume < -10000)
85 volpan->lVolume=-10000;
86 volpan->lPan=right-left;
87 if (volpan->lPan < -10000)
88 volpan->lPan=-10000;
90 TRACE("Vol=%d Pan=%d\n", volpan->lVolume, volpan->lPan);
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
98 DWORD DSOUND_bufpos_to_mixpos(const DirectSoundDevice* device, DWORD pos)
100 DWORD ret = pos * 32 / device->pwfx->wBitsPerSample;
101 if (device->pwfx->wBitsPerSample == 32)
102 ret *= 2;
103 return ret;
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
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)
113 DWORD DSOUND_secpos_to_bufpos(const IDirectSoundBufferImpl *dsb, DWORD secpos, DWORD secmixpos, DWORD* overshot)
115 DWORD64 framelen = secpos / dsb->pwfx->nBlockAlign;
116 DWORD64 freqAdjust = dsb->freqAdjust;
117 DWORD64 acc, freqAcc;
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)
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);
132 return (DWORD)acc * dsb->device->pwfx->nBlockAlign;
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
139 static DWORD DSOUND_bufpos_to_secpos(const IDirectSoundBufferImpl *dsb, DWORD bufpos)
141 DWORD oAdv = dsb->device->pwfx->nBlockAlign, iAdv = dsb->pwfx->nBlockAlign, pos;
142 DWORD64 framelen;
143 DWORD64 acc;
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;
157 * Move freqAccNext to freqAcc, and find new values for buffer length and freqAccNext
159 static void DSOUND_RecalcFreqAcc(IDirectSoundBufferImpl *dsb)
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);
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
173 * After this, DSOUND_MixToTemporary(dsb, 0, dsb->buflen) should
174 * be called to refill the temporary buffer with data.
176 void DSOUND_RecalcFormat(IDirectSoundBufferImpl *dsb)
178 BOOL needremix = TRUE, needresample = (dsb->freq != dsb->device->pwfx->nSamplesPerSec);
179 DWORD bAlign = dsb->pwfx->nBlockAlign, pAlign = dsb->device->pwfx->nBlockAlign;
181 TRACE("(%p)\n",dsb);
183 /* calculate the 10ms write lead */
184 dsb->writelead = (dsb->freq / 100) * dsb->pwfx->nBlockAlign;
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;
194 dsb->convert = convertbpp[dsb->pwfx->wBitsPerSample/8 - 1][dsb->device->pwfx->wBitsPerSample/8 - 1];
196 dsb->resampleinmixer = FALSE;
198 if (needremix)
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;
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);
217 * Check for application callback requests for when the play position
218 * reaches certain points.
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.
224 void DSOUND_CheckEvent(const IDirectSoundBufferImpl *dsb, DWORD playpos, int len)
226 int i;
227 DWORD offset;
228 LPDSBPOSITIONNOTIFY event;
229 TRACE("(%p,%d)\n",dsb,len);
231 if (dsb->nrofnotifies == 0)
232 return;
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);
253 continue;
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);
261 } else {
262 if ((offset >= playpos) && (offset < (playpos + len))) {
263 TRACE("signalled event %p (%d)\n", event->hEventNotify, i);
264 SetEvent(event->hEventNotify);
271 * Copy a single frame from the given input buffer to the given output buffer.
272 * Translate 8 <-> 16 bits and mono <-> stereo
274 static inline void cp_fields(const IDirectSoundBufferImpl *dsb, const BYTE *ibuf, BYTE *obuf )
276 DirectSoundDevice *device = dsb->device;
277 INT istep = dsb->pwfx->wBitsPerSample / 8, ostep = device->pwfx->wBitsPerSample / 8;
279 if (device->pwfx->nChannels == dsb->pwfx->nChannels) {
280 dsb->convert(ibuf, obuf);
281 if (device->pwfx->nChannels == 2)
282 dsb->convert(ibuf + istep, obuf + ostep);
285 if (device->pwfx->nChannels == 1 && dsb->pwfx->nChannels == 2)
287 dsb->convert(ibuf, obuf);
290 if (device->pwfx->nChannels == 2 && dsb->pwfx->nChannels == 1)
292 dsb->convert(ibuf, obuf);
293 dsb->convert(ibuf, obuf + ostep);
298 * Calculate the distance between two buffer offsets, taking wraparound
299 * into account.
301 static inline DWORD DSOUND_BufPtrDiff(DWORD buflen, DWORD ptr1, DWORD ptr2)
303 /* If these asserts fail, the problem is not here, but in the underlying code */
304 assert(ptr1 < buflen);
305 assert(ptr2 < buflen);
306 if (ptr1 >= ptr2) {
307 return ptr1 - ptr2;
308 } else {
309 return buflen + ptr1 - ptr2;
313 * Mix at most the given amount of data into the allocated temporary buffer
314 * of the given secondary buffer, starting from the dsb's first currently
315 * unsampled frame (writepos), translating frequency (pitch), stereo/mono
316 * and bits-per-sample so that it is ideal for the primary buffer.
317 * Doesn't perform any mixing - this is a straight copy/convert operation.
319 * dsb = the secondary buffer
320 * writepos = Starting position of changed buffer
321 * len = number of bytes to resample from writepos
323 * NOTE: writepos + len <= buflen. When called by mixer, MixOne makes sure of this.
325 void DSOUND_MixToTemporary(const IDirectSoundBufferImpl *dsb, DWORD writepos, DWORD len, BOOL inmixer)
327 DWORD i;
328 INT size;
329 BYTE *ibp, *obp, *obp_begin;
330 INT iAdvance = dsb->pwfx->nBlockAlign;
331 INT oAdvance = dsb->device->pwfx->nBlockAlign;
332 DWORD freqAcc, target_writepos = 0, overshot, maxlen;
334 /* We resample only when needed */
335 if ((dsb->tmp_buffer && inmixer) || (!dsb->tmp_buffer && !inmixer) || dsb->resampleinmixer != inmixer)
336 return;
338 assert(writepos + len <= dsb->buflen);
339 if (inmixer && writepos + len < dsb->buflen)
340 len += dsb->pwfx->nBlockAlign;
342 maxlen = DSOUND_secpos_to_bufpos(dsb, len, 0, NULL);
344 ibp = dsb->buffer->memory + writepos;
345 if (!inmixer)
346 obp_begin = dsb->tmp_buffer;
347 else if (dsb->device->tmp_buffer_len < maxlen || !dsb->device->tmp_buffer)
349 dsb->device->tmp_buffer_len = maxlen;
350 if (dsb->device->tmp_buffer)
351 dsb->device->tmp_buffer = HeapReAlloc(GetProcessHeap(), 0, dsb->device->tmp_buffer, maxlen);
352 else
353 dsb->device->tmp_buffer = HeapAlloc(GetProcessHeap(), 0, maxlen);
354 obp_begin = dsb->device->tmp_buffer;
356 else
357 obp_begin = dsb->device->tmp_buffer;
359 TRACE("(%p, %p)\n", dsb, ibp);
361 /* Check for same sample rate */
362 if (dsb->freq == dsb->device->pwfx->nSamplesPerSec) {
363 TRACE("(%p) Same sample rate %d = primary %d\n", dsb,
364 dsb->freq, dsb->device->pwfx->nSamplesPerSec);
365 obp = obp_begin;
366 if (!inmixer)
367 obp += writepos/iAdvance*oAdvance;
369 for (i = 0; i < len; i += iAdvance) {
370 cp_fields(dsb, ibp, obp);
371 ibp += iAdvance;
372 obp += oAdvance;
374 return;
377 /* Mix in different sample rates */
378 TRACE("(%p) Adjusting frequency: %d -> %d\n", dsb, dsb->freq, dsb->device->pwfx->nSamplesPerSec);
379 size = len / iAdvance;
381 target_writepos = DSOUND_secpos_to_bufpos(dsb, writepos, dsb->sec_mixpos, &freqAcc);
382 overshot = freqAcc >> DSOUND_FREQSHIFT;
383 if (overshot)
385 if (overshot >= size)
386 return;
387 size -= overshot;
388 writepos += overshot * iAdvance;
389 if (writepos >= dsb->buflen)
390 return;
391 ibp = dsb->buffer->memory + writepos;
392 freqAcc &= (1 << DSOUND_FREQSHIFT) - 1;
393 TRACE("Overshot: %d, freqAcc: %04x\n", overshot, freqAcc);
396 if (!inmixer)
397 obp = obp_begin + target_writepos;
398 else obp = obp_begin;
400 /* FIXME: Small problem here when we're overwriting buf_mixpos, it then STILL uses old freqAcc, not sure if it matters or not */
401 while (size > 0) {
402 cp_fields(dsb, ibp, obp);
403 obp += oAdvance;
404 freqAcc += dsb->freqAdjust;
405 if (freqAcc >= (1<<DSOUND_FREQSHIFT)) {
406 ULONG adv = (freqAcc>>DSOUND_FREQSHIFT);
407 freqAcc &= (1<<DSOUND_FREQSHIFT)-1;
408 ibp += adv * iAdvance;
409 size -= adv;
414 /** Apply volume to the given soundbuffer from (primary) position writepos and length len
415 * Returns: NULL if no volume needs to be applied
416 * or else a memory handle that holds 'len' volume adjusted buffer */
417 static LPBYTE DSOUND_MixerVol(const IDirectSoundBufferImpl *dsb, INT len)
419 INT i;
420 BYTE *bpc;
421 INT16 *bps, *mems;
422 DWORD vLeft, vRight;
423 INT nChannels = dsb->device->pwfx->nChannels;
424 LPBYTE mem = (dsb->tmp_buffer ? dsb->tmp_buffer : dsb->buffer->memory) + dsb->buf_mixpos;
426 if (dsb->resampleinmixer)
427 mem = dsb->device->tmp_buffer;
429 TRACE("(%p,%d)\n",dsb,len);
430 TRACE("left = %x, right = %x\n", dsb->volpan.dwTotalLeftAmpFactor,
431 dsb->volpan.dwTotalRightAmpFactor);
433 if ((!(dsb->dsbd.dwFlags & DSBCAPS_CTRLPAN) || (dsb->volpan.lPan == 0)) &&
434 (!(dsb->dsbd.dwFlags & DSBCAPS_CTRLVOLUME) || (dsb->volpan.lVolume == 0)) &&
435 !(dsb->dsbd.dwFlags & DSBCAPS_CTRL3D))
436 return NULL; /* Nothing to do */
438 if (nChannels != 1 && nChannels != 2)
440 FIXME("There is no support for %d channels\n", nChannels);
441 return NULL;
444 if (dsb->device->pwfx->wBitsPerSample != 8 && dsb->device->pwfx->wBitsPerSample != 16)
446 FIXME("There is no support for %d bpp\n", dsb->device->pwfx->wBitsPerSample);
447 return NULL;
450 if (dsb->device->tmp_buffer_len < len || !dsb->device->tmp_buffer)
452 /* If we just resampled in DSOUND_MixToTemporary, we shouldn't need to resize here */
453 assert(!dsb->resampleinmixer);
454 dsb->device->tmp_buffer_len = len;
455 if (dsb->device->tmp_buffer)
456 dsb->device->tmp_buffer = HeapReAlloc(GetProcessHeap(), 0, dsb->device->tmp_buffer, len);
457 else
458 dsb->device->tmp_buffer = HeapAlloc(GetProcessHeap(), 0, len);
461 bpc = dsb->device->tmp_buffer;
462 bps = (INT16 *)bpc;
463 mems = (INT16 *)mem;
464 vLeft = dsb->volpan.dwTotalLeftAmpFactor;
465 if (nChannels > 1)
466 vRight = dsb->volpan.dwTotalRightAmpFactor;
467 else
468 vRight = vLeft;
470 switch (dsb->device->pwfx->wBitsPerSample) {
471 case 8:
472 /* 8-bit WAV is unsigned, but we need to operate */
473 /* on signed data for this to work properly */
474 for (i = 0; i < len-1; i+=2) {
475 *(bpc++) = (((*(mem++) - 128) * vLeft) >> 16) + 128;
476 *(bpc++) = (((*(mem++) - 128) * vRight) >> 16) + 128;
478 if (len % 2 == 1 && nChannels == 1)
479 *(bpc++) = (((*(mem++) - 128) * vLeft) >> 16) + 128;
480 break;
481 case 16:
482 /* 16-bit WAV is signed -- much better */
483 for (i = 0; i < len-3; i += 4) {
484 *(bps++) = (*(mems++) * vLeft) >> 16;
485 *(bps++) = (*(mems++) * vRight) >> 16;
487 if (len % 4 == 2 && nChannels == 1)
488 *(bps++) = ((INT)*(mems++) * vLeft) >> 16;
489 break;
491 return dsb->device->tmp_buffer;
495 * Mix (at most) the given number of bytes into the given position of the
496 * device buffer, from the secondary buffer "dsb" (starting at the current
497 * mix position for that buffer).
499 * Returns the number of bytes actually mixed into the device buffer. This
500 * will match fraglen unless the end of the secondary buffer is reached
501 * (and it is not looping).
503 * dsb = the secondary buffer to mix from
504 * writepos = position (offset) in device buffer to write at
505 * fraglen = number of bytes to mix
507 static DWORD DSOUND_MixInBuffer(IDirectSoundBufferImpl *dsb, DWORD writepos, DWORD fraglen)
509 INT len = fraglen, ilen;
510 BYTE *ibuf = (dsb->tmp_buffer ? dsb->tmp_buffer : dsb->buffer->memory) + dsb->buf_mixpos, *volbuf;
511 DWORD oldpos, mixbufpos;
513 TRACE("buf_mixpos=%d/%d sec_mixpos=%d/%d\n", dsb->buf_mixpos, dsb->tmp_buffer_len, dsb->sec_mixpos, dsb->buflen);
514 TRACE("(%p,%d,%d)\n",dsb,writepos,fraglen);
516 assert(dsb->buf_mixpos + len <= dsb->tmp_buffer_len);
518 if (len % dsb->device->pwfx->nBlockAlign) {
519 INT nBlockAlign = dsb->device->pwfx->nBlockAlign;
520 ERR("length not a multiple of block size, len = %d, block size = %d\n", len, nBlockAlign);
521 len -= len % nBlockAlign; /* data alignment */
524 /* Resample buffer to temporary buffer specifically allocated for this purpose, if needed */
525 DSOUND_MixToTemporary(dsb, dsb->sec_mixpos, DSOUND_bufpos_to_secpos(dsb, dsb->buf_mixpos+len) - dsb->sec_mixpos, TRUE);
526 if (dsb->resampleinmixer)
527 ibuf = dsb->device->tmp_buffer;
529 /* Apply volume if needed */
530 volbuf = DSOUND_MixerVol(dsb, len);
531 if (volbuf)
532 ibuf = volbuf;
534 mixbufpos = DSOUND_bufpos_to_mixpos(dsb->device, writepos);
535 /* Now mix the temporary buffer into the devices main buffer */
536 if ((writepos + len) <= dsb->device->buflen)
537 dsb->device->mixfunction(ibuf, dsb->device->mix_buffer + mixbufpos, len);
538 else
540 DWORD todo = dsb->device->buflen - writepos;
541 dsb->device->mixfunction(ibuf, dsb->device->mix_buffer + mixbufpos, todo);
542 dsb->device->mixfunction(ibuf + todo, dsb->device->mix_buffer, len - todo);
545 oldpos = dsb->sec_mixpos;
546 dsb->buf_mixpos += len;
548 if (dsb->buf_mixpos >= dsb->tmp_buffer_len) {
549 if (dsb->buf_mixpos > dsb->tmp_buffer_len)
550 ERR("Mixpos (%u) past buflen (%u), capping...\n", dsb->buf_mixpos, dsb->tmp_buffer_len);
551 if (dsb->playflags & DSBPLAY_LOOPING) {
552 dsb->buf_mixpos -= dsb->tmp_buffer_len;
553 } else if (dsb->buf_mixpos >= dsb->tmp_buffer_len) {
554 dsb->buf_mixpos = dsb->sec_mixpos = 0;
555 dsb->state = STATE_STOPPED;
557 DSOUND_RecalcFreqAcc(dsb);
560 dsb->sec_mixpos = DSOUND_bufpos_to_secpos(dsb, dsb->buf_mixpos);
561 ilen = DSOUND_BufPtrDiff(dsb->buflen, dsb->sec_mixpos, oldpos);
562 /* check for notification positions */
563 if (dsb->dsbd.dwFlags & DSBCAPS_CTRLPOSITIONNOTIFY &&
564 dsb->state != STATE_STARTING) {
565 DSOUND_CheckEvent(dsb, oldpos, ilen);
568 /* increase mix position */
569 dsb->primary_mixpos += len;
570 if (dsb->primary_mixpos >= dsb->device->buflen)
571 dsb->primary_mixpos -= dsb->device->buflen;
572 return len;
576 * Mix some frames from the given secondary buffer "dsb" into the device
577 * primary buffer.
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
583 * current writepos.
585 * Returns: the number of bytes beyond the writepos that were mixed.
587 static DWORD DSOUND_MixOne(IDirectSoundBufferImpl *dsb, DWORD writepos, DWORD mixlen)
589 /* The buffer's primary_mixpos may be before or after the device
590 * buffer's mixpos, but both must be ahead of writepos. */
591 DWORD primary_done;
593 TRACE("(%p,%d,%d)\n",dsb,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, leadin=%d, buflen=%d\n", dsb->playflags, dsb->leadin, dsb->tmp_buffer_len);
597 /* If leading in, only mix about 20 ms, and 'skip' mixing the rest, for more fluid pointer advancement */
598 if (dsb->leadin && dsb->state == STATE_STARTING)
600 if (mixlen > 2 * dsb->device->fraglen)
602 dsb->primary_mixpos += mixlen - 2 * dsb->device->fraglen;
603 dsb->primary_mixpos %= dsb->device->buflen;
606 dsb->leadin = FALSE;
608 /* calculate how much pre-buffering has already been done for this buffer */
609 primary_done = DSOUND_BufPtrDiff(dsb->device->buflen, dsb->primary_mixpos, writepos);
611 /* sanity */
612 if(mixlen < primary_done)
614 /* Should *NEVER* happen */
615 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);
616 return 0;
619 /* take into account already mixed data */
620 mixlen -= primary_done;
622 TRACE("primary_done=%d, mixlen (primary) = %i\n", primary_done, mixlen);
624 if (!mixlen)
625 return primary_done;
627 /* First try to mix to the end of the buffer if possible
628 * Theoretically it would allow for better optimization
630 if (mixlen + dsb->buf_mixpos >= dsb->tmp_buffer_len)
632 DWORD newmixed, mixfirst = dsb->tmp_buffer_len - dsb->buf_mixpos;
633 newmixed = DSOUND_MixInBuffer(dsb, dsb->primary_mixpos, mixfirst);
634 mixlen -= newmixed;
636 if (dsb->playflags & DSBPLAY_LOOPING)
637 while (newmixed && mixlen)
639 mixfirst = (dsb->tmp_buffer_len < mixlen ? dsb->tmp_buffer_len : mixlen);
640 newmixed = DSOUND_MixInBuffer(dsb, dsb->primary_mixpos, mixfirst);
641 mixlen -= newmixed;
644 else DSOUND_MixInBuffer(dsb, dsb->primary_mixpos, mixlen);
646 /* re-calculate the primary done */
647 primary_done = DSOUND_BufPtrDiff(dsb->device->buflen, dsb->primary_mixpos, writepos);
649 TRACE("new primary_mixpos=%d, total mixed data=%d\n", dsb->primary_mixpos, primary_done);
651 /* Report back the total prebuffered amount for this buffer */
652 return primary_done;
656 * For a DirectSoundDevice, go through all the currently playing buffers and
657 * mix them in to the device buffer.
659 * writepos = the current safe-to-write position in the primary buffer
660 * mixlen = the maximum amount to mix into the primary buffer
661 * (beyond the current writepos)
662 * mustlock = Do we have to fight for lock because we otherwise risk an underrun?
663 * recover = true if the sound device may have been reset and the write
664 * position in the device buffer changed
665 * all_stopped = reports back if all buffers have stopped
667 * Returns: the length beyond the writepos that was mixed to.
670 static DWORD DSOUND_MixToPrimary(const DirectSoundDevice *device, DWORD writepos, DWORD mixlen, BOOL mustlock, BOOL recover, BOOL *all_stopped)
672 INT i, len;
673 DWORD minlen = 0;
674 IDirectSoundBufferImpl *dsb;
675 BOOL gotall = TRUE;
677 /* unless we find a running buffer, all have stopped */
678 *all_stopped = TRUE;
680 TRACE("(%d,%d,%d)\n", writepos, mixlen, recover);
681 for (i = 0; i < device->nrofbuffers; i++) {
682 dsb = device->buffers[i];
684 TRACE("MixToPrimary for %p, state=%d\n", dsb, dsb->state);
686 if (dsb->buflen && dsb->state && !dsb->hwbuf) {
687 TRACE("Checking %p, mixlen=%d\n", dsb, mixlen);
688 if (!RtlAcquireResourceShared(&dsb->lock, mustlock))
690 gotall = FALSE;
691 continue;
693 /* if buffer is stopping it is stopped now */
694 if (dsb->state == STATE_STOPPING) {
695 dsb->state = STATE_STOPPED;
696 DSOUND_CheckEvent(dsb, 0, 0);
697 } else if (dsb->state != STATE_STOPPED) {
699 /* if recovering, reset the mix position */
700 if ((dsb->state == STATE_STARTING) || recover) {
701 dsb->primary_mixpos = writepos;
704 /* if the buffer was starting, it must be playing now */
705 if (dsb->state == STATE_STARTING)
706 dsb->state = STATE_PLAYING;
708 /* mix next buffer into the main buffer */
709 len = DSOUND_MixOne(dsb, writepos, mixlen);
711 if (!minlen) 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 else if (len) minlen = (len < minlen) ? len : minlen;
717 *all_stopped = FALSE;
719 RtlReleaseResource(&dsb->lock);
723 TRACE("Mixed at least %d from all buffers\n", minlen);
724 if (!gotall) return 0;
725 return minlen;
729 * Add buffers to the emulated wave device system.
731 * device = The current dsound playback device
732 * force = If TRUE, the function will buffer up as many frags as possible,
733 * even though and will ignore the actual state of the primary buffer.
735 * Returns: None
738 static void DSOUND_WaveQueue(DirectSoundDevice *device, BOOL force)
740 DWORD prebuf_frags, wave_writepos, wave_fragpos, i;
741 TRACE("(%p)\n", device);
743 /* calculate the current wave frag position */
744 wave_fragpos = (device->pwplay + device->pwqueue) % device->helfrags;
746 /* calculate the current wave write position */
747 wave_writepos = wave_fragpos * device->fraglen;
749 TRACE("wave_fragpos = %i, wave_writepos = %i, pwqueue = %i, prebuf = %i\n",
750 wave_fragpos, wave_writepos, device->pwqueue, device->prebuf);
752 if (!force)
754 /* check remaining prebuffered frags */
755 prebuf_frags = device->mixpos / device->fraglen;
756 if (prebuf_frags == device->helfrags)
757 --prebuf_frags;
758 TRACE("wave_fragpos = %d, mixpos_frags = %d\n", wave_fragpos, prebuf_frags);
759 if (prebuf_frags < wave_fragpos)
760 prebuf_frags += device->helfrags;
761 prebuf_frags -= wave_fragpos;
762 TRACE("wanted prebuf_frags = %d\n", prebuf_frags);
764 else
765 /* buffer the maximum amount of frags */
766 prebuf_frags = device->prebuf;
768 /* limit to the queue we have left */
769 if ((prebuf_frags + device->pwqueue) > device->prebuf)
770 prebuf_frags = device->prebuf - device->pwqueue;
772 TRACE("prebuf_frags = %i\n", prebuf_frags);
774 /* adjust queue */
775 device->pwqueue += prebuf_frags;
777 /* get out of CS when calling the wave system */
778 LeaveCriticalSection(&(device->mixlock));
779 /* **** */
781 /* queue up the new buffers */
782 for(i=0; i<prebuf_frags; i++){
783 TRACE("queueing wave buffer %i\n", wave_fragpos);
784 waveOutWrite(device->hwo, &device->pwave[wave_fragpos], sizeof(WAVEHDR));
785 wave_fragpos++;
786 wave_fragpos %= device->helfrags;
789 /* **** */
790 EnterCriticalSection(&(device->mixlock));
792 TRACE("queue now = %i\n", device->pwqueue);
796 * Perform mixing for a Direct Sound device. That is, go through all the
797 * secondary buffers (the sound bites currently playing) and mix them in
798 * to the primary buffer (the device buffer).
800 static void DSOUND_PerformMix(DirectSoundDevice *device)
802 TRACE("(%p)\n", device);
804 /* **** */
805 EnterCriticalSection(&(device->mixlock));
807 if (device->priolevel != DSSCL_WRITEPRIMARY) {
808 BOOL recover = FALSE, all_stopped = FALSE;
809 DWORD playpos, writepos, writelead, maxq, frag, prebuff_max, prebuff_left, size1, size2, mixplaypos, mixplaypos2;
810 LPVOID buf1, buf2;
811 BOOL lock = (device->hwbuf && !(device->drvdesc.dwFlags & DSDDESC_DONTNEEDPRIMARYLOCK));
812 BOOL mustlock = FALSE;
813 int nfiller;
815 /* the sound of silence */
816 nfiller = device->pwfx->wBitsPerSample == 8 ? 128 : 0;
818 /* get the position in the primary buffer */
819 if (DSOUND_PrimaryGetPosition(device, &playpos, &writepos) != 0){
820 LeaveCriticalSection(&(device->mixlock));
821 return;
824 TRACE("primary playpos=%d, writepos=%d, clrpos=%d, mixpos=%d, buflen=%d\n",
825 playpos,writepos,device->playpos,device->mixpos,device->buflen);
826 assert(device->playpos < device->buflen);
828 mixplaypos = DSOUND_bufpos_to_mixpos(device, device->playpos);
829 mixplaypos2 = DSOUND_bufpos_to_mixpos(device, playpos);
831 /* calc maximum prebuff */
832 prebuff_max = (device->prebuf * device->fraglen);
833 if (!device->hwbuf && playpos + prebuff_max >= device->helfrags * device->fraglen)
834 prebuff_max += device->buflen - device->helfrags * device->fraglen;
836 /* check how close we are to an underrun. It occurs when the writepos overtakes the mixpos */
837 prebuff_left = DSOUND_BufPtrDiff(device->buflen, device->mixpos, playpos);
838 writelead = DSOUND_BufPtrDiff(device->buflen, writepos, playpos);
840 /* check for underrun. underrun occurs when the write position passes the mix position
841 * also wipe out just-played sound data */
842 if((prebuff_left > prebuff_max) || (device->state == STATE_STOPPED) || (device->state == STATE_STARTING)){
843 if (device->state == STATE_STOPPING || device->state == STATE_PLAYING)
844 WARN("Probable buffer underrun\n");
845 else TRACE("Buffer starting or buffer underrun\n");
847 /* recover mixing for all buffers */
848 recover = TRUE;
850 /* reset mix position to write position */
851 device->mixpos = writepos;
853 ZeroMemory(device->mix_buffer, device->mix_buffer_len);
854 ZeroMemory(device->buffer, device->buflen);
855 } else if (playpos < device->playpos) {
856 buf1 = device->buffer + device->playpos;
857 buf2 = device->buffer;
858 size1 = device->buflen - device->playpos;
859 size2 = playpos;
860 FillMemory(device->mix_buffer + mixplaypos, device->mix_buffer_len - mixplaypos, 0);
861 FillMemory(device->mix_buffer, mixplaypos2, 0);
862 if (lock)
863 IDsDriverBuffer_Lock(device->hwbuf, &buf1, &size1, &buf2, &size2, device->playpos, size1+size2, 0);
864 FillMemory(buf1, size1, nfiller);
865 if (playpos && (!buf2 || !size2))
866 FIXME("%d: (%d, %d)=>(%d, %d) There should be an additional buffer here!!\n", __LINE__, device->playpos, device->mixpos, playpos, writepos);
867 FillMemory(buf2, size2, nfiller);
868 if (lock)
869 IDsDriverBuffer_Unlock(device->hwbuf, buf1, size1, buf2, size2);
870 } else {
871 buf1 = device->buffer + device->playpos;
872 buf2 = NULL;
873 size1 = playpos - device->playpos;
874 size2 = 0;
875 FillMemory(device->mix_buffer + mixplaypos, mixplaypos2 - mixplaypos, 0);
876 if (lock)
877 IDsDriverBuffer_Lock(device->hwbuf, &buf1, &size1, &buf2, &size2, device->playpos, size1+size2, 0);
878 FillMemory(buf1, size1, nfiller);
879 if (buf2 && size2)
881 FIXME("%d: There should be no additional buffer here!!\n", __LINE__);
882 FillMemory(buf2, size2, nfiller);
884 if (lock)
885 IDsDriverBuffer_Unlock(device->hwbuf, buf1, size1, buf2, size2);
887 device->playpos = playpos;
889 /* find the maximum we can prebuffer from current write position */
890 maxq = (writelead < prebuff_max) ? (prebuff_max - writelead) : 0;
892 TRACE("prebuff_left = %d, prebuff_max = %dx%d=%d, writelead=%d\n",
893 prebuff_left, device->prebuf, device->fraglen, prebuff_max, writelead);
895 /* Do we risk an 'underrun' if we don't advance pointer? */
896 if (writelead/device->fraglen <= ds_snd_queue_min || recover)
897 mustlock = TRUE;
899 if (lock)
900 IDsDriverBuffer_Lock(device->hwbuf, &buf1, &size1, &buf2, &size2, writepos, maxq, 0);
902 /* do the mixing */
903 frag = DSOUND_MixToPrimary(device, writepos, maxq, mustlock, recover, &all_stopped);
905 if (frag + writepos > device->buflen)
907 DWORD todo = device->buflen - writepos;
908 device->normfunction(device->mix_buffer + DSOUND_bufpos_to_mixpos(device, writepos), device->buffer + writepos, todo);
909 device->normfunction(device->mix_buffer, device->buffer, frag - todo);
911 else
912 device->normfunction(device->mix_buffer + DSOUND_bufpos_to_mixpos(device, writepos), device->buffer + writepos, frag);
914 /* update the mix position, taking wrap-around into account */
915 device->mixpos = writepos + frag;
916 device->mixpos %= device->buflen;
918 if (lock)
920 DWORD frag2 = (frag > size1 ? frag - size1 : 0);
921 frag -= frag2;
922 if (frag2 > size2)
924 FIXME("Buffering too much! (%d, %d, %d, %d)\n", maxq, frag, size2, frag2 - size2);
925 frag2 = size2;
927 IDsDriverBuffer_Unlock(device->hwbuf, buf1, frag, buf2, frag2);
930 /* update prebuff left */
931 prebuff_left = DSOUND_BufPtrDiff(device->buflen, device->mixpos, playpos);
933 /* check if have a whole fragment */
934 if (prebuff_left >= device->fraglen){
936 /* update the wave queue if using wave system */
937 if (!device->hwbuf)
938 DSOUND_WaveQueue(device, FALSE);
940 /* buffers are full. start playing if applicable */
941 if(device->state == STATE_STARTING){
942 TRACE("started primary buffer\n");
943 if(DSOUND_PrimaryPlay(device) != DS_OK){
944 WARN("DSOUND_PrimaryPlay failed\n");
946 else{
947 /* we are playing now */
948 device->state = STATE_PLAYING;
952 /* buffers are full. start stopping if applicable */
953 if(device->state == STATE_STOPPED){
954 TRACE("restarting primary buffer\n");
955 if(DSOUND_PrimaryPlay(device) != DS_OK){
956 WARN("DSOUND_PrimaryPlay failed\n");
958 else{
959 /* start stopping again. as soon as there is no more data, it will stop */
960 device->state = STATE_STOPPING;
965 /* if device was stopping, its for sure stopped when all buffers have stopped */
966 else if((all_stopped == TRUE) && (device->state == STATE_STOPPING)){
967 TRACE("All buffers have stopped. Stopping primary buffer\n");
968 device->state = STATE_STOPPED;
970 /* stop the primary buffer now */
971 DSOUND_PrimaryStop(device);
974 } else {
976 /* update the wave queue if using wave system */
977 if (!device->hwbuf)
978 DSOUND_WaveQueue(device, TRUE);
979 else
980 /* Keep alsa happy, which needs GetPosition called once every 10 ms */
981 IDsDriverBuffer_GetPosition(device->hwbuf, NULL, NULL);
983 /* in the DSSCL_WRITEPRIMARY mode, the app is totally in charge... */
984 if (device->state == STATE_STARTING) {
985 if (DSOUND_PrimaryPlay(device) != DS_OK)
986 WARN("DSOUND_PrimaryPlay failed\n");
987 else
988 device->state = STATE_PLAYING;
990 else if (device->state == STATE_STOPPING) {
991 if (DSOUND_PrimaryStop(device) != DS_OK)
992 WARN("DSOUND_PrimaryStop failed\n");
993 else
994 device->state = STATE_STOPPED;
998 LeaveCriticalSection(&(device->mixlock));
999 /* **** */
1002 void CALLBACK DSOUND_timer(UINT timerID, UINT msg, DWORD_PTR dwUser,
1003 DWORD_PTR dw1, DWORD_PTR dw2)
1005 DirectSoundDevice * device = (DirectSoundDevice*)dwUser;
1006 DWORD start_time = GetTickCount();
1007 DWORD end_time;
1008 TRACE("(%d,%d,0x%lx,0x%lx,0x%lx)\n",timerID,msg,dwUser,dw1,dw2);
1009 TRACE("entering at %d\n", start_time);
1011 if (DSOUND_renderer[device->drvdesc.dnDevNode] != device) {
1012 ERR("dsound died without killing us?\n");
1013 timeKillEvent(timerID);
1014 timeEndPeriod(DS_TIME_RES);
1015 return;
1018 RtlAcquireResourceShared(&(device->buffer_list_lock), TRUE);
1020 if (device->ref)
1021 DSOUND_PerformMix(device);
1023 RtlReleaseResource(&(device->buffer_list_lock));
1025 end_time = GetTickCount();
1026 TRACE("completed processing at %d, duration = %d\n", end_time, end_time - start_time);
1029 void CALLBACK DSOUND_callback(HWAVEOUT hwo, UINT msg, DWORD_PTR dwUser, DWORD_PTR dw1, DWORD_PTR dw2)
1031 DirectSoundDevice * device = (DirectSoundDevice*)dwUser;
1032 TRACE("(%p,%x,%lx,%lx,%lx)\n",hwo,msg,dwUser,dw1,dw2);
1033 TRACE("entering at %d, msg=%08x(%s)\n", GetTickCount(), msg,
1034 msg==MM_WOM_DONE ? "MM_WOM_DONE" : msg==MM_WOM_CLOSE ? "MM_WOM_CLOSE" :
1035 msg==MM_WOM_OPEN ? "MM_WOM_OPEN" : "UNKNOWN");
1037 /* check if packet completed from wave driver */
1038 if (msg == MM_WOM_DONE) {
1040 /* **** */
1041 EnterCriticalSection(&(device->mixlock));
1043 TRACE("done playing primary pos=%d\n", device->pwplay * device->fraglen);
1045 /* update playpos */
1046 device->pwplay++;
1047 device->pwplay %= device->helfrags;
1049 /* sanity */
1050 if(device->pwqueue == 0){
1051 ERR("Wave queue corrupted!\n");
1054 /* update queue */
1055 device->pwqueue--;
1057 LeaveCriticalSection(&(device->mixlock));
1058 /* **** */
1060 TRACE("completed\n");