mshtml: Added IHTMLWindow2::get_self implementation.
[wine] / dlls / winealsa.drv / dsoutput.c
1 /*
2  * Sample Wine Driver for Advanced Linux Sound System (ALSA)
3  *      Based on version <final> of the ALSA API
4  *
5  * Copyright    2002 Eric Pouech
6  *              2002 Marco Pietrobono
7  *              2003 Christian Costa : WaveIn support
8  *              2006-2007 Maarten Lankhorst
9  *
10  * This library is free software; you can redistribute it and/or
11  * modify it under the terms of the GNU Lesser General Public
12  * License as published by the Free Software Foundation; either
13  * version 2.1 of the License, or (at your option) any later version.
14  *
15  * This library is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
18  * Lesser General Public License for more details.
19  *
20  * You should have received a copy of the GNU Lesser General Public
21  * License along with this library; if not, write to the Free Software
22  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
23  */
24
25 /*======================================================================*
26  *              Low level dsound output implementation                  *
27  *======================================================================*/
28
29 #include "config.h"
30 #include "wine/port.h"
31
32 #include <stdlib.h>
33 #include <assert.h>
34 #include <stdarg.h>
35 #include <stdio.h>
36 #include <string.h>
37 #ifdef HAVE_UNISTD_H
38 # include <unistd.h>
39 #endif
40 #include <errno.h>
41 #include <limits.h>
42 #include <fcntl.h>
43 #ifdef HAVE_SYS_IOCTL_H
44 # include <sys/ioctl.h>
45 #endif
46 #ifdef HAVE_SYS_MMAN_H
47 # include <sys/mman.h>
48 #endif
49 #include "windef.h"
50 #include "winbase.h"
51 #include "wingdi.h"
52 #include "winerror.h"
53 #include "winuser.h"
54 #include "mmddk.h"
55
56 #include "alsa.h"
57 #include "wine/library.h"
58 #include "wine/unicode.h"
59 #include "wine/debug.h"
60
61 #ifdef HAVE_ALSA
62
63 WINE_DEFAULT_DEBUG_CHANNEL(dsalsa);
64
65 typedef struct IDsDriverImpl IDsDriverImpl;
66 typedef struct IDsDriverBufferImpl IDsDriverBufferImpl;
67
68 struct IDsDriverImpl
69 {
70     /* IUnknown fields */
71     const IDsDriverVtbl *lpVtbl;
72     LONG ref;
73
74     /* IDsDriverImpl fields */
75     IDsDriverBufferImpl* primary;
76     UINT wDevID;
77 };
78
79 struct IDsDriverBufferImpl
80 {
81     const IDsDriverBufferVtbl *lpVtbl;
82     LONG ref;
83     IDsDriverImpl* drv;
84
85     CRITICAL_SECTION pcm_crst;
86     LPVOID mmap_buffer;
87     DWORD mmap_buflen_bytes;
88
89     snd_pcm_t *pcm;
90     snd_pcm_hw_params_t *hw_params;
91     snd_pcm_sw_params_t *sw_params;
92     snd_pcm_uframes_t mmap_buflen_frames, mmap_pos, mmap_commitahead;
93 };
94
95 /** Fill buffers, for starting and stopping
96  * Alsa won't start playing until everything is filled up
97  * This also updates mmap_pos
98  *
99  * Returns: Amount of periods in use so snd_pcm_avail_update
100  * doesn't have to be called up to 4x in GetPosition()
101  */
102 static snd_pcm_uframes_t CommitAll(IDsDriverBufferImpl *This)
103 {
104     const snd_pcm_channel_area_t *areas;
105     snd_pcm_uframes_t used;
106     const snd_pcm_uframes_t commitahead = This->mmap_commitahead;
107
108     used = This->mmap_buflen_frames - snd_pcm_avail_update(This->pcm);
109     TRACE("%p needs to commit to %lu, used: %lu\n", This, commitahead, used);
110     if (used < commitahead)
111     {
112         snd_pcm_uframes_t done, putin = commitahead - used;
113         snd_pcm_mmap_begin(This->pcm, &areas, &This->mmap_pos, &putin);
114         done = snd_pcm_mmap_commit(This->pcm, This->mmap_pos, putin);
115         This->mmap_pos += done;
116         used += done;
117         putin = commitahead - used;
118
119         if (This->mmap_pos == This->mmap_buflen_frames && (snd_pcm_sframes_t)putin > 0)
120         {
121             snd_pcm_mmap_begin(This->pcm, &areas, &This->mmap_pos, &putin);
122             done = snd_pcm_mmap_commit(This->pcm, This->mmap_pos, putin);
123             This->mmap_pos += done;
124             used += done;
125         }
126     }
127
128     if (This->mmap_pos == This->mmap_buflen_frames)
129         This->mmap_pos = 0;
130
131     return used;
132 }
133
134 static void CheckXRUN(IDsDriverBufferImpl* This)
135 {
136     snd_pcm_state_t state = snd_pcm_state(This->pcm);
137     snd_pcm_sframes_t delay;
138     int err;
139
140     snd_pcm_hwsync(This->pcm);
141     snd_pcm_delay(This->pcm, &delay);
142     if ( state == SND_PCM_STATE_XRUN )
143     {
144         err = snd_pcm_prepare(This->pcm);
145         CommitAll(This);
146         snd_pcm_start(This->pcm);
147         WARN("xrun occurred\n");
148         if ( err < 0 )
149             ERR("recovery from xrun failed, prepare failed: %s\n", snd_strerror(err));
150     }
151     else if ( state == SND_PCM_STATE_SUSPENDED )
152     {
153         int err = snd_pcm_resume(This->pcm);
154         TRACE("recovery from suspension occurred\n");
155         if (err < 0 && err != -EAGAIN){
156             err = snd_pcm_prepare(This->pcm);
157             if (err < 0)
158                 ERR("recovery from suspend failed, prepare failed: %s\n", snd_strerror(err));
159         }
160     } else if ( state != SND_PCM_STATE_RUNNING ) {
161         FIXME("Unhandled state: %d\n", state);
162     }
163 }
164
165 /**
166  * Allocate the memory-mapped buffer for direct sound, and set up the
167  * callback.
168  */
169 static int DSDB_CreateMMAP(IDsDriverBufferImpl* pdbi)
170 {
171     snd_pcm_t *pcm = pdbi->pcm;
172     snd_pcm_format_t format;
173     snd_pcm_uframes_t frames, ofs, avail, psize, boundary;
174     unsigned int channels, bits_per_sample, bits_per_frame;
175     int err, mmap_mode;
176     const snd_pcm_channel_area_t *areas;
177     snd_pcm_hw_params_t *hw_params = pdbi->hw_params;
178     snd_pcm_sw_params_t *sw_params = pdbi->sw_params;
179
180     mmap_mode = snd_pcm_type(pcm);
181
182     if (mmap_mode == SND_PCM_TYPE_HW)
183         TRACE("mmap'd buffer is a direct hardware buffer.\n");
184     else if (mmap_mode == SND_PCM_TYPE_DMIX)
185         TRACE("mmap'd buffer is an ALSA dmix buffer\n");
186     else
187         TRACE("mmap'd buffer is an ALSA type %d buffer\n", mmap_mode);
188
189     err = snd_pcm_hw_params_get_period_size(hw_params, &psize, NULL);
190
191     err = snd_pcm_hw_params_get_format(hw_params, &format);
192     err = snd_pcm_hw_params_get_buffer_size(hw_params, &frames);
193     err = snd_pcm_hw_params_get_channels(hw_params, &channels);
194     bits_per_sample = snd_pcm_format_physical_width(format);
195     bits_per_frame = bits_per_sample * channels;
196
197     if (TRACE_ON(dsalsa))
198         ALSA_TraceParameters(hw_params, NULL, FALSE);
199
200     TRACE("format=%s  frames=%ld  channels=%d  bits_per_sample=%d  bits_per_frame=%d\n",
201           snd_pcm_format_name(format), frames, channels, bits_per_sample, bits_per_frame);
202
203     pdbi->mmap_buflen_frames = frames;
204     pdbi->mmap_buflen_bytes = snd_pcm_frames_to_bytes( pcm, frames );
205
206     snd_pcm_sw_params_current(pcm, sw_params);
207     snd_pcm_sw_params_set_start_threshold(pcm, sw_params, 0);
208     snd_pcm_sw_params_get_boundary(sw_params, &boundary);
209     snd_pcm_sw_params_set_stop_threshold(pcm, sw_params, boundary);
210     snd_pcm_sw_params_set_silence_threshold(pcm, sw_params, INT_MAX);
211     snd_pcm_sw_params_set_silence_size(pcm, sw_params, 0);
212     snd_pcm_sw_params_set_avail_min(pcm, sw_params, 0);
213     snd_pcm_sw_params_set_xrun_mode(pcm, sw_params, SND_PCM_XRUN_NONE);
214     err = snd_pcm_sw_params(pcm, sw_params);
215
216     avail = snd_pcm_avail_update(pcm);
217     if (avail < 0)
218     {
219         ERR("No buffer is available: %s.\n", snd_strerror(avail));
220         return DSERR_GENERIC;
221     }
222     err = snd_pcm_mmap_begin(pcm, &areas, &ofs, &avail);
223     if ( err < 0 )
224     {
225         ERR("Can't map sound device for direct access: %s\n", snd_strerror(err));
226         return DSERR_GENERIC;
227     }
228     snd_pcm_format_set_silence(format, areas->addr, pdbi->mmap_buflen_frames);
229     pdbi->mmap_pos = ofs + snd_pcm_mmap_commit(pcm, ofs, 0);
230     pdbi->mmap_buffer = areas->addr;
231
232     TRACE("created mmap buffer of %ld frames (%d bytes) at %p\n",
233         frames, pdbi->mmap_buflen_bytes, pdbi->mmap_buffer);
234
235     return DS_OK;
236 }
237
238 static HRESULT WINAPI IDsDriverBufferImpl_QueryInterface(PIDSDRIVERBUFFER iface, REFIID riid, LPVOID *ppobj)
239 {
240     /* IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface; */
241     FIXME("(): stub!\n");
242     return DSERR_UNSUPPORTED;
243 }
244
245 static ULONG WINAPI IDsDriverBufferImpl_AddRef(PIDSDRIVERBUFFER iface)
246 {
247     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
248     ULONG refCount = InterlockedIncrement(&This->ref);
249
250     TRACE("(%p)->(ref before=%u)\n",This, refCount - 1);
251
252     return refCount;
253 }
254
255 static ULONG WINAPI IDsDriverBufferImpl_Release(PIDSDRIVERBUFFER iface)
256 {
257     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
258     ULONG refCount = InterlockedDecrement(&This->ref);
259
260     TRACE("(%p)->(ref before=%u)\n",This, refCount + 1);
261
262     if (refCount)
263         return refCount;
264
265     TRACE("mmap buffer %p destroyed\n", This->mmap_buffer);
266
267     if (This == This->drv->primary)
268         This->drv->primary = NULL;
269
270     This->pcm_crst.DebugInfo->Spare[0] = 0;
271     DeleteCriticalSection(&This->pcm_crst);
272
273     snd_pcm_drop(This->pcm);
274     snd_pcm_close(This->pcm);
275     This->pcm = NULL;
276     HeapFree(GetProcessHeap(), 0, This->sw_params);
277     HeapFree(GetProcessHeap(), 0, This->hw_params);
278     HeapFree(GetProcessHeap(), 0, This);
279     return 0;
280 }
281
282 static HRESULT WINAPI IDsDriverBufferImpl_Lock(PIDSDRIVERBUFFER iface,
283                                                LPVOID*ppvAudio1,LPDWORD pdwLen1,
284                                                LPVOID*ppvAudio2,LPDWORD pdwLen2,
285                                                DWORD dwWritePosition,DWORD dwWriteLen,
286                                                DWORD dwFlags)
287 {
288     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
289     snd_pcm_uframes_t writepos;
290
291     TRACE("%d bytes from %d\n", dwWriteLen, dwWritePosition);
292
293     /* **** */
294     EnterCriticalSection(&This->pcm_crst);
295
296     if (dwFlags & DSBLOCK_ENTIREBUFFER)
297         dwWriteLen = This->mmap_buflen_bytes;
298
299     if (dwWriteLen > This->mmap_buflen_bytes || dwWritePosition >= This->mmap_buflen_bytes)
300     {
301         /* **** */
302         LeaveCriticalSection(&This->pcm_crst);
303         return DSERR_INVALIDPARAM;
304     }
305
306     if (ppvAudio2) *ppvAudio2 = NULL;
307     if (pdwLen2) *pdwLen2 = 0;
308
309     *ppvAudio1 = (LPBYTE)This->mmap_buffer + dwWritePosition;
310     *pdwLen1 = dwWriteLen;
311
312     if (dwWritePosition+dwWriteLen > This->mmap_buflen_bytes)
313     {
314         DWORD remainder = This->mmap_buflen_bytes - dwWritePosition;
315         *pdwLen1 = remainder;
316
317         if (ppvAudio2 && pdwLen2)
318         {
319             *ppvAudio2 = This->mmap_buffer;
320             *pdwLen2 = dwWriteLen - remainder;
321         }
322         else dwWriteLen = remainder;
323     }
324
325     writepos = snd_pcm_bytes_to_frames(This->pcm, dwWritePosition);
326     if (writepos == This->mmap_pos)
327     {
328         const snd_pcm_channel_area_t *areas;
329         snd_pcm_uframes_t writelen = snd_pcm_bytes_to_frames(This->pcm, dwWriteLen), putin = writelen;
330         TRACE("Hit mmap_pos, locking data!\n");
331         snd_pcm_mmap_begin(This->pcm, &areas, &This->mmap_pos, &putin);
332     }
333
334     LeaveCriticalSection(&This->pcm_crst);
335     /* **** */
336     return DS_OK;
337 }
338
339 static HRESULT WINAPI IDsDriverBufferImpl_Unlock(PIDSDRIVERBUFFER iface,
340                                                  LPVOID pvAudio1,DWORD dwLen1,
341                                                  LPVOID pvAudio2,DWORD dwLen2)
342 {
343     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
344     snd_pcm_uframes_t writepos;
345
346     if (!dwLen1)
347         return DS_OK;
348
349     /* **** */
350     EnterCriticalSection(&This->pcm_crst);
351
352     writepos = snd_pcm_bytes_to_frames(This->pcm, (DWORD_PTR)pvAudio1 - (DWORD_PTR)This->mmap_buffer);
353     if (writepos == This->mmap_pos)
354     {
355         const snd_pcm_channel_area_t *areas;
356         snd_pcm_uframes_t writelen = snd_pcm_bytes_to_frames(This->pcm, dwLen1);
357         TRACE("Committing data\n");
358         This->mmap_pos += snd_pcm_mmap_commit(This->pcm, This->mmap_pos, writelen);
359         if (This->mmap_pos == This->mmap_buflen_frames)
360             This->mmap_pos = 0;
361         if (!This->mmap_pos && dwLen2)
362         {
363             writelen = snd_pcm_bytes_to_frames(This->pcm, dwLen2);
364             snd_pcm_mmap_begin(This->pcm, &areas, &This->mmap_pos, &writelen);
365             This->mmap_pos += snd_pcm_mmap_commit(This->pcm, This->mmap_pos, writelen);
366             assert(This->mmap_pos < This->mmap_buflen_frames);
367         }
368     }
369     LeaveCriticalSection(&This->pcm_crst);
370     /* **** */
371
372     return DS_OK;
373 }
374
375 static HRESULT SetFormat(IDsDriverBufferImpl *This, LPWAVEFORMATEX pwfx)
376 {
377     snd_pcm_t *pcm = NULL;
378     snd_pcm_hw_params_t *hw_params = This->hw_params;
379     unsigned int buffer_time = 500000;
380     snd_pcm_format_t format = -1;
381     snd_pcm_uframes_t psize;
382     DWORD rate = pwfx->nSamplesPerSec;
383     int err=0;
384
385     switch (pwfx->wBitsPerSample)
386     {
387         case  8: format = SND_PCM_FORMAT_U8; break;
388         case 16: format = SND_PCM_FORMAT_S16_LE; break;
389         case 24: format = SND_PCM_FORMAT_S24_3LE; break;
390         case 32: format = SND_PCM_FORMAT_S32_LE; break;
391         default: FIXME("Unsupported bpp: %d\n", pwfx->wBitsPerSample); return DSERR_GENERIC;
392     }
393
394     err = snd_pcm_open(&pcm, WOutDev[This->drv->wDevID].pcmname, SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
395     if (err < 0)
396     {
397         if (errno != EBUSY || !This->pcm)
398         {
399             WARN("Cannot open sound device: %s\n", snd_strerror(err));
400             return DSERR_GENERIC;
401         }
402         snd_pcm_drop(This->pcm);
403         snd_pcm_close(This->pcm);
404         This->pcm = NULL;
405         err = snd_pcm_open(&pcm, WOutDev[This->drv->wDevID].pcmname, SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
406         if (err < 0)
407         {
408             WARN("Cannot open sound device: %s\n", snd_strerror(err));
409             return DSERR_BUFFERLOST;
410         }
411     }
412
413     /* Set some defaults */
414     snd_pcm_hw_params_any(pcm, hw_params);
415     err = snd_pcm_hw_params_set_channels(pcm, hw_params, pwfx->nChannels);
416     if (err < 0) { WARN("Could not set channels to %d\n", pwfx->nChannels); goto err; }
417
418     err = snd_pcm_hw_params_set_format(pcm, hw_params, format);
419     if (err < 0) { WARN("Could not set format to %d bpp\n", pwfx->wBitsPerSample); goto err; }
420
421     /* Alsa's rate resampling is only used if the application specifically requests
422      * a buffer at a certain frequency, else it is better to disable it due to unwanted
423      * side effects, which may include: Less granular pointer, changing buffer sizes, etc
424      */
425 #if SND_LIB_VERSION >= 0x010009
426     snd_pcm_hw_params_set_rate_resample(pcm, hw_params, 0);
427 #endif
428
429     err = snd_pcm_hw_params_set_rate_near(pcm, hw_params, &rate, NULL);
430     if (err < 0) { rate = pwfx->nSamplesPerSec; WARN("Could not set rate\n"); goto err; }
431
432     if (!ALSA_NearMatch(rate, pwfx->nSamplesPerSec))
433     {
434         WARN("Could not set sound rate to %d, but instead to %d\n", pwfx->nSamplesPerSec, rate);
435         pwfx->nSamplesPerSec = rate;
436         pwfx->nAvgBytesPerSec = rate * pwfx->nBlockAlign;
437         /* Let DirectSound detect this */
438     }
439
440     snd_pcm_hw_params_set_periods_integer(pcm, hw_params);
441     snd_pcm_hw_params_set_buffer_time_near(pcm, hw_params, &buffer_time, NULL);
442     buffer_time = 10000;
443     snd_pcm_hw_params_set_period_time_near(pcm, hw_params, &buffer_time, NULL);
444     err = snd_pcm_hw_params(pcm, hw_params);
445     err = snd_pcm_sw_params(pcm, This->sw_params);
446     snd_pcm_prepare(pcm);
447
448     err = snd_pcm_hw_params_get_period_size(hw_params, &psize, NULL);
449     TRACE("Period size is: %lu\n", psize);
450
451     /* ALSA needs at least 3 buffers to work successfully */
452     This->mmap_commitahead = 3 * psize;
453     while (This->mmap_commitahead <= 512)
454         This->mmap_commitahead += psize;
455
456     if (This->pcm)
457     {
458         snd_pcm_drop(This->pcm);
459         snd_pcm_close(This->pcm);
460     }
461     This->pcm = pcm;
462     snd_pcm_prepare(This->pcm);
463     DSDB_CreateMMAP(This);
464     return S_OK;
465
466     err:
467     if (err < 0)
468         WARN("Failed to apply changes: %s\n", snd_strerror(err));
469
470     if (!This->pcm)
471         This->pcm = pcm;
472     else
473         snd_pcm_close(pcm);
474
475     if (This->pcm)
476         snd_pcm_hw_params_current(This->pcm, This->hw_params);
477
478     return DSERR_BADFORMAT;
479 }
480
481 static HRESULT WINAPI IDsDriverBufferImpl_SetFormat(PIDSDRIVERBUFFER iface, LPWAVEFORMATEX pwfx)
482 {
483     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
484     HRESULT hr = S_OK;
485
486     TRACE("(%p, %p)\n", iface, pwfx);
487
488     /* **** */
489     EnterCriticalSection(&This->pcm_crst);
490     hr = SetFormat(This, pwfx);
491     /* **** */
492     LeaveCriticalSection(&This->pcm_crst);
493
494     if (hr == DS_OK)
495         return S_FALSE;
496     return hr;
497 }
498
499 static HRESULT WINAPI IDsDriverBufferImpl_SetFrequency(PIDSDRIVERBUFFER iface, DWORD dwFreq)
500 {
501     /* IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface; */
502     FIXME("(%p,%d): stub\n",iface,dwFreq);
503     return S_OK;
504 }
505
506 static HRESULT WINAPI IDsDriverBufferImpl_SetVolumePan(PIDSDRIVERBUFFER iface, PDSVOLUMEPAN pVolPan)
507 {
508     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
509     FIXME("(%p,%p): stub\n",This,pVolPan);
510     /* TODO: Bring volume control back */
511     return DS_OK;
512 }
513
514 static HRESULT WINAPI IDsDriverBufferImpl_SetPosition(PIDSDRIVERBUFFER iface, DWORD dwNewPos)
515 {
516     /* IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface; */
517     /* I don't even think alsa allows this */
518     FIXME("(%p,%d): stub\n",iface,dwNewPos);
519     return DSERR_UNSUPPORTED;
520 }
521
522 static HRESULT WINAPI IDsDriverBufferImpl_GetPosition(PIDSDRIVERBUFFER iface,
523                                                       LPDWORD lpdwPlay, LPDWORD lpdwWrite)
524 {
525     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
526     snd_pcm_uframes_t hw_pptr, hw_wptr;
527     snd_pcm_state_t state;
528
529     /* **** */
530     EnterCriticalSection(&This->pcm_crst);
531
532     if (!This->pcm)
533     {
534         FIXME("Bad pointer for pcm: %p\n", This->pcm);
535         LeaveCriticalSection(&This->pcm_crst);
536         return DSERR_GENERIC;
537     }
538
539     if (!lpdwPlay && !lpdwWrite)
540         CommitAll(This);
541
542     state = snd_pcm_state(This->pcm);
543
544     if (state != SND_PCM_STATE_PREPARED && state != SND_PCM_STATE_RUNNING)
545     {
546         CheckXRUN(This);
547         state = snd_pcm_state(This->pcm);
548     }
549     if (state == SND_PCM_STATE_RUNNING)
550     {
551         snd_pcm_uframes_t used = This->mmap_buflen_frames - snd_pcm_avail_update(This->pcm);
552
553         if (This->mmap_pos > used)
554             hw_pptr = This->mmap_pos - used;
555         else
556             hw_pptr = This->mmap_buflen_frames + This->mmap_pos - used;
557         hw_pptr %= This->mmap_buflen_frames;
558
559         TRACE("At position: %ld (%ld) - Used %ld\n", hw_pptr, This->mmap_pos, used);
560     }
561     else hw_pptr = This->mmap_pos;
562     hw_wptr = This->mmap_pos;
563
564     LeaveCriticalSection(&This->pcm_crst);
565     /* **** */
566
567     if (lpdwPlay)
568         *lpdwPlay = snd_pcm_frames_to_bytes(This->pcm, hw_pptr);
569     if (lpdwWrite)
570         *lpdwWrite = snd_pcm_frames_to_bytes(This->pcm, hw_wptr);
571
572     TRACE("hw_pptr=0x%08x, hw_wptr=0x%08x playpos=%d, writepos=%d\n", (unsigned int)hw_pptr, (unsigned int)hw_wptr, lpdwPlay?*lpdwPlay:-1, lpdwWrite?*lpdwWrite:-1);
573     return DS_OK;
574 }
575
576 static HRESULT WINAPI IDsDriverBufferImpl_Play(PIDSDRIVERBUFFER iface, DWORD dwRes1, DWORD dwRes2, DWORD dwFlags)
577 {
578     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
579     TRACE("(%p,%x,%x,%x)\n",iface,dwRes1,dwRes2,dwFlags);
580
581     /* **** */
582     EnterCriticalSection(&This->pcm_crst);
583     snd_pcm_start(This->pcm);
584     /* **** */
585     LeaveCriticalSection(&This->pcm_crst);
586     return DS_OK;
587 }
588
589 static HRESULT WINAPI IDsDriverBufferImpl_Stop(PIDSDRIVERBUFFER iface)
590 {
591     const snd_pcm_channel_area_t *areas;
592     snd_pcm_uframes_t avail;
593     snd_pcm_format_t format;
594     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
595     TRACE("(%p)\n",iface);
596
597     /* **** */
598     EnterCriticalSection(&This->pcm_crst);
599     avail = This->mmap_buflen_frames;
600     snd_pcm_drop(This->pcm);
601     snd_pcm_prepare(This->pcm);
602     avail = snd_pcm_avail_update(This->pcm);
603     snd_pcm_mmap_begin(This->pcm, &areas, &This->mmap_pos, &avail);
604     snd_pcm_hw_params_get_format(This->hw_params, &format);
605     snd_pcm_format_set_silence(format, areas->addr, This->mmap_buflen_frames);
606     snd_pcm_mmap_commit(This->pcm, This->mmap_pos, 0);
607
608     /* **** */
609     LeaveCriticalSection(&This->pcm_crst);
610     return DS_OK;
611 }
612
613 static const IDsDriverBufferVtbl dsdbvt =
614 {
615     IDsDriverBufferImpl_QueryInterface,
616     IDsDriverBufferImpl_AddRef,
617     IDsDriverBufferImpl_Release,
618     IDsDriverBufferImpl_Lock,
619     IDsDriverBufferImpl_Unlock,
620     IDsDriverBufferImpl_SetFormat,
621     IDsDriverBufferImpl_SetFrequency,
622     IDsDriverBufferImpl_SetVolumePan,
623     IDsDriverBufferImpl_SetPosition,
624     IDsDriverBufferImpl_GetPosition,
625     IDsDriverBufferImpl_Play,
626     IDsDriverBufferImpl_Stop
627 };
628
629 static HRESULT WINAPI IDsDriverImpl_QueryInterface(PIDSDRIVER iface, REFIID riid, LPVOID *ppobj)
630 {
631     /* IDsDriverImpl *This = (IDsDriverImpl *)iface; */
632     FIXME("(%p): stub!\n",iface);
633     return DSERR_UNSUPPORTED;
634 }
635
636 static ULONG WINAPI IDsDriverImpl_AddRef(PIDSDRIVER iface)
637 {
638     IDsDriverImpl *This = (IDsDriverImpl *)iface;
639     ULONG refCount = InterlockedIncrement(&This->ref);
640
641     TRACE("(%p)->(ref before=%u)\n",This, refCount - 1);
642
643     return refCount;
644 }
645
646 static ULONG WINAPI IDsDriverImpl_Release(PIDSDRIVER iface)
647 {
648     IDsDriverImpl *This = (IDsDriverImpl *)iface;
649     ULONG refCount = InterlockedDecrement(&This->ref);
650
651     TRACE("(%p)->(ref before=%u)\n",This, refCount + 1);
652
653     if (refCount)
654         return refCount;
655
656     HeapFree(GetProcessHeap(), 0, This);
657     return 0;
658 }
659
660 static HRESULT WINAPI IDsDriverImpl_GetDriverDesc(PIDSDRIVER iface, PDSDRIVERDESC pDesc)
661 {
662     IDsDriverImpl *This = (IDsDriverImpl *)iface;
663     TRACE("(%p,%p)\n",iface,pDesc);
664     *pDesc                      = WOutDev[This->wDevID].ds_desc;
665     pDesc->dwFlags              = DSDDESC_DONTNEEDSECONDARYLOCK | DSDDESC_DONTNEEDWRITELEAD;
666     pDesc->dnDevNode            = WOutDev[This->wDevID].waveDesc.dnDevNode;
667     pDesc->wVxdId               = 0;
668     pDesc->wReserved            = 0;
669     pDesc->ulDeviceNum          = This->wDevID;
670     pDesc->dwHeapType           = DSDHEAP_NOHEAP;
671     pDesc->pvDirectDrawHeap     = NULL;
672     pDesc->dwMemStartAddress    = 0xDEAD0000;
673     pDesc->dwMemEndAddress      = 0xDEAF0000;
674     pDesc->dwMemAllocExtra      = 0;
675     pDesc->pvReserved1          = NULL;
676     pDesc->pvReserved2          = NULL;
677     return DS_OK;
678 }
679
680 static HRESULT WINAPI IDsDriverImpl_Open(PIDSDRIVER iface)
681 {
682     HRESULT hr = S_OK;
683     IDsDriverImpl *This = (IDsDriverImpl *)iface;
684     int err=0;
685     snd_pcm_t *pcm = NULL;
686     snd_pcm_hw_params_t *hw_params;
687
688     /* While this is not really needed, it is a good idea to do this,
689      * to see if sound can be initialized */
690
691     hw_params = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, snd_pcm_hw_params_sizeof());
692
693     if (!hw_params)
694     {
695         hr = DSERR_OUTOFMEMORY;
696         goto unalloc;
697     }
698
699     err = snd_pcm_open(&pcm, WOutDev[This->wDevID].pcmname, SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
700     if (err < 0) goto err;
701     err = snd_pcm_hw_params_any(pcm, hw_params);
702     if (err < 0) goto err;
703     err = snd_pcm_hw_params_set_access (pcm, hw_params, SND_PCM_ACCESS_MMAP_INTERLEAVED);
704     if (err < 0) goto err;
705
706     TRACE("Success\n");
707     snd_pcm_close(pcm);
708     goto unalloc;
709
710     err:
711     hr = DSERR_GENERIC;
712     FIXME("Failed to open device: %s\n", snd_strerror(err));
713     if (pcm)
714         snd_pcm_close(pcm);
715     unalloc:
716     HeapFree(GetProcessHeap(), 0, hw_params);
717     if (hr != S_OK)
718         WARN("--> %08x\n", hr);
719     return hr;
720 }
721
722 static HRESULT WINAPI IDsDriverImpl_Close(PIDSDRIVER iface)
723 {
724     IDsDriverImpl *This = (IDsDriverImpl *)iface;
725     TRACE("(%p) stub, harmless\n",This);
726     return DS_OK;
727 }
728
729 static HRESULT WINAPI IDsDriverImpl_GetCaps(PIDSDRIVER iface, PDSDRIVERCAPS pCaps)
730 {
731     IDsDriverImpl *This = (IDsDriverImpl *)iface;
732     TRACE("(%p,%p)\n",iface,pCaps);
733     *pCaps = WOutDev[This->wDevID].ds_caps;
734     return DS_OK;
735 }
736
737 static HRESULT WINAPI IDsDriverImpl_CreateSoundBuffer(PIDSDRIVER iface,
738                                                       LPWAVEFORMATEX pwfx,
739                                                       DWORD dwFlags, DWORD dwCardAddress,
740                                                       LPDWORD pdwcbBufferSize,
741                                                       LPBYTE *ppbBuffer,
742                                                       LPVOID *ppvObj)
743 {
744     IDsDriverImpl *This = (IDsDriverImpl *)iface;
745     IDsDriverBufferImpl** ippdsdb = (IDsDriverBufferImpl**)ppvObj;
746     HRESULT err;
747
748     TRACE("(%p,%p,%x,%x)\n",iface,pwfx,dwFlags,dwCardAddress);
749     /* we only support primary buffers... for now */
750     if (!(dwFlags & DSBCAPS_PRIMARYBUFFER))
751         return DSERR_UNSUPPORTED;
752     if (This->primary)
753         return DSERR_ALLOCATED;
754
755     *ippdsdb = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(IDsDriverBufferImpl));
756     if (*ippdsdb == NULL)
757         return DSERR_OUTOFMEMORY;
758
759     (*ippdsdb)->hw_params = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, snd_pcm_hw_params_sizeof());
760     (*ippdsdb)->sw_params = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, snd_pcm_sw_params_sizeof());
761     if (!(*ippdsdb)->hw_params || !(*ippdsdb)->sw_params)
762     {
763         HeapFree(GetProcessHeap(), 0, (*ippdsdb)->sw_params);
764         HeapFree(GetProcessHeap(), 0, (*ippdsdb)->hw_params);
765         return DSERR_OUTOFMEMORY;
766     }
767     (*ippdsdb)->lpVtbl  = &dsdbvt;
768     (*ippdsdb)->ref     = 1;
769     (*ippdsdb)->drv     = This;
770     InitializeCriticalSection(&(*ippdsdb)->pcm_crst);
771     (*ippdsdb)->pcm_crst.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": ALSA_DSOUTPUT.pcm_crst");
772
773     /* SetFormat has to re-initialize pcm here anyway */
774     err = SetFormat(*ippdsdb, pwfx);
775     if (FAILED(err))
776     {
777         WARN("Error occurred: %08x\n", err);
778         goto err;
779     }
780
781     if (dwFlags & DSBCAPS_PRIMARYBUFFER)
782         This->primary = *ippdsdb;
783
784     *pdwcbBufferSize = (*ippdsdb)->mmap_buflen_bytes;
785     *ppbBuffer = (*ippdsdb)->mmap_buffer;
786
787     /* buffer is ready to go */
788     TRACE("buffer created at %p\n", *ippdsdb);
789     return err;
790
791     err:
792     HeapFree(GetProcessHeap(), 0, (*ippdsdb)->sw_params);
793     HeapFree(GetProcessHeap(), 0, (*ippdsdb)->hw_params);
794     HeapFree(GetProcessHeap(), 0, *ippdsdb);
795     *ippdsdb = NULL;
796     return err;
797 }
798
799 static HRESULT WINAPI IDsDriverImpl_DuplicateSoundBuffer(PIDSDRIVER iface,
800                                                          PIDSDRIVERBUFFER pBuffer,
801                                                          LPVOID *ppvObj)
802 {
803     IDsDriverImpl *This = (IDsDriverImpl *)iface;
804     FIXME("(%p,%p): stub\n",This,pBuffer);
805     return DSERR_INVALIDCALL;
806 }
807
808 static const IDsDriverVtbl dsdvt =
809 {
810     IDsDriverImpl_QueryInterface,
811     IDsDriverImpl_AddRef,
812     IDsDriverImpl_Release,
813     IDsDriverImpl_GetDriverDesc,
814     IDsDriverImpl_Open,
815     IDsDriverImpl_Close,
816     IDsDriverImpl_GetCaps,
817     IDsDriverImpl_CreateSoundBuffer,
818     IDsDriverImpl_DuplicateSoundBuffer
819 };
820
821 DWORD wodDsCreate(UINT wDevID, PIDSDRIVER* drv)
822 {
823     IDsDriverImpl** idrv = (IDsDriverImpl**)drv;
824
825     TRACE("driver created\n");
826
827     /* the HAL isn't much better than the HEL if we can't do mmap() */
828     if (!(WOutDev[wDevID].outcaps.dwSupport & WAVECAPS_DIRECTSOUND))
829     {
830         WARN("MMAP not supported for this device, falling back to waveout, should be harmless\n");
831         return MMSYSERR_NOTSUPPORTED;
832     }
833
834     *idrv = HeapAlloc(GetProcessHeap(),0,sizeof(IDsDriverImpl));
835     if (!*idrv)
836         return MMSYSERR_NOMEM;
837     (*idrv)->lpVtbl     = &dsdvt;
838     (*idrv)->ref        = 1;
839
840     (*idrv)->wDevID     = wDevID;
841     (*idrv)->primary    = NULL;
842     return MMSYSERR_NOERROR;
843 }
844
845 DWORD wodDsDesc(UINT wDevID, PDSDRIVERDESC desc)
846 {
847     *desc = WOutDev[wDevID].ds_desc;
848     return MMSYSERR_NOERROR;
849 }
850
851 #endif /* HAVE_ALSA */