git.oblomov.eu Git - wine/blob - dlls/winealsa.drv/dscapture.c

   1 /*
   2  * Sample Wine Driver for Advanced Linux Sound System (ALSA)
   3  *      Based on version <final> of the ALSA API
   4  *
   5  * Copyright 2007 - Maarten Lankhorst
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21
  22 /*======================================================================*
  23  *              Low level dsound input implementation                   *
  24  *======================================================================*/
  25
  26 #include "config.h"
  27 #include "wine/port.h"
  28
  29 #include <stdlib.h>
  30 #include <stdarg.h>
  31 #include <stdio.h>
  32 #include <string.h>
  33 #ifdef HAVE_UNISTD_H
  34 # include <unistd.h>
  35 #endif
  36 #include <errno.h>
  37 #include <limits.h>
  38 #include <fcntl.h>
  39 #ifdef HAVE_SYS_IOCTL_H
  40 # include <sys/ioctl.h>
  41 #endif
  42 #ifdef HAVE_SYS_MMAN_H
  43 # include <sys/mman.h>
  44 #endif
  45 #include "windef.h"
  46 #include "winbase.h"
  47 #include "wingdi.h"
  48 #include "winerror.h"
  49 #include "winuser.h"
  50 #include "mmddk.h"
  51
  52 #include "alsa.h"
  53 #include "wine/library.h"
  54 #include "wine/unicode.h"
  55 #include "wine/debug.h"
  56
  57 #ifdef HAVE_ALSA
  58
  59 /* Notify timer checks every 10 ms with a resolution of 2 ms */
  60 #define DS_TIME_DEL 10
  61 #define DS_TIME_RES 2
  62
  63 WINE_DEFAULT_DEBUG_CHANNEL(dsalsa);
  64
  65 typedef struct IDsCaptureDriverBufferImpl IDsCaptureDriverBufferImpl;
  66
  67 typedef struct IDsCaptureDriverImpl
  68 {
  69     const IDsCaptureDriverVtbl *lpVtbl;
  70     LONG ref;
  71     IDsCaptureDriverBufferImpl* capture_buffer;
  72     UINT wDevID;
  73 } IDsCaptureDriverImpl;
  74
  75 typedef struct IDsCaptureDriverNotifyImpl
  76 {
  77     const IDsDriverNotifyVtbl *lpVtbl;
  78     LONG ref;
  79     IDsCaptureDriverBufferImpl *buffer;
  80     DSBPOSITIONNOTIFY *notifies;
  81     DWORD nrofnotifies, playpos;
  82     UINT timerID;
  83 } IDsCaptureDriverNotifyImpl;
  84
  85 struct IDsCaptureDriverBufferImpl
  86 {
  87     const IDsCaptureDriverBufferVtbl *lpVtbl;
  88     LONG ref;
  89     IDsCaptureDriverImpl *drv;
  90     IDsCaptureDriverNotifyImpl *notify;
  91
  92     CRITICAL_SECTION pcm_crst;
  93     LPBYTE mmap_buffer, presented_buffer;
  94     DWORD mmap_buflen_bytes, play_looping, mmap_ofs_bytes;
  95     BOOL mmap;
  96
  97     /* Note: snd_pcm_frames_to_bytes(This->pcm, mmap_buflen_frames) != mmap_buflen_bytes */
  98     /* The actual buffer may differ in size from the wanted buffer size */
  99
 100     snd_pcm_t *pcm;
 101     snd_pcm_hw_params_t *hw_params;
 102     snd_pcm_sw_params_t *sw_params;
 103     snd_pcm_uframes_t mmap_buflen_frames, mmap_pos;
 104 };
 105
 106 static void Capture_CheckNotify(IDsCaptureDriverNotifyImpl *This, DWORD from, DWORD len)
 107 {
 108     unsigned i;
 109     for (i = 0; i < This->nrofnotifies; ++i) {
 110         LPDSBPOSITIONNOTIFY event = This->notifies + i;
 111         DWORD offset = event->dwOffset;
 112         TRACE("checking %d, position %d, event = %p\n", i, offset, event->hEventNotify);
 113
 114         if (offset == DSBPN_OFFSETSTOP) {
 115             if (!from && !len) {
 116                 SetEvent(event->hEventNotify);
 117                 TRACE("signalled event %p (%d)\n", event->hEventNotify, i);
 118                 return;
 119             }
 120             else return;
 121         }
 122
 123         if (offset >= from && offset < (from + len))
 124         {
 125             TRACE("signalled event %p (%d)\n", event->hEventNotify, i);
 126             SetEvent(event->hEventNotify);
 127         }
 128     }
 129 }
 130
 131 static void CALLBACK Capture_Notify(UINT timerID, UINT msg, DWORD_PTR dwUser, DWORD_PTR dw1, DWORD_PTR dw2)
 132 {
 133     IDsCaptureDriverBufferImpl *This = (IDsCaptureDriverBufferImpl *)dwUser;
 134     DWORD last_playpos, playpos;
 135     PIDSCDRIVERBUFFER iface = (PIDSCDRIVERBUFFER)This;
 136
 137     /* **** */
 138     /* Don't deadlock since there is a critical section can be held by the timer api itself while running this code */
 139     if (!TryEnterCriticalSection(&This->pcm_crst)) return;
 140
 141     IDsDriverBuffer_GetPosition(iface, &playpos, NULL);
 142     last_playpos = This->notify->playpos;
 143     This->notify->playpos = playpos;
 144
 145     if (snd_pcm_state(This->pcm) != SND_PCM_STATE_RUNNING || last_playpos == playpos || !This->notify->nrofnotifies || !This->notify->notifies)
 146         goto done;
 147
 148     if (playpos < last_playpos)
 149     {
 150         Capture_CheckNotify(This->notify, last_playpos, This->mmap_buflen_bytes);
 151         if (playpos)
 152             Capture_CheckNotify(This->notify, 0, playpos);
 153     }
 154     else Capture_CheckNotify(This->notify, last_playpos, playpos - last_playpos);
 155
 156 done:
 157     LeaveCriticalSection(&This->pcm_crst);
 158     /* **** */
 159 }
 160
 161 static HRESULT WINAPI IDsCaptureDriverNotifyImpl_QueryInterface(PIDSDRIVERNOTIFY iface, REFIID riid, LPVOID *ppobj)
 162 {
 163     IDsCaptureDriverNotifyImpl *This = (IDsCaptureDriverNotifyImpl *)iface;
 164     TRACE("(%p,%s,%p)\n",This,debugstr_guid(riid),ppobj);
 165
 166     if ( IsEqualGUID(riid, &IID_IUnknown) ||
 167          IsEqualGUID(riid, &IID_IDsDriverNotify) ) {
 168         IDsDriverNotify_AddRef(iface);
 169         *ppobj = This;
 170         return DS_OK;
 171     }
 172
 173     FIXME( "Unknown IID %s\n", debugstr_guid(riid));
 174
 175     *ppobj = 0;
 176     return E_NOINTERFACE;
 177 }
 178
 179 static ULONG WINAPI IDsCaptureDriverNotifyImpl_AddRef(PIDSDRIVERNOTIFY iface)
 180 {
 181     IDsCaptureDriverNotifyImpl *This = (IDsCaptureDriverNotifyImpl *)iface;
 182     ULONG refCount = InterlockedIncrement(&This->ref);
 183
 184     TRACE("(%p) ref was %d\n", This, refCount - 1);
 185
 186     return refCount;
 187 }
 188
 189 static ULONG WINAPI IDsCaptureDriverNotifyImpl_Release(PIDSDRIVERNOTIFY iface)
 190 {
 191     IDsCaptureDriverNotifyImpl *This = (IDsCaptureDriverNotifyImpl *)iface;
 192     ULONG refCount = InterlockedDecrement(&This->ref);
 193
 194     TRACE("(%p) ref was %d\n", This, refCount + 1);
 195
 196     if (!refCount) {
 197         This->buffer->notify = NULL;
 198         if (This->timerID)
 199         {
 200             timeKillEvent(This->timerID);
 201             timeEndPeriod(DS_TIME_RES);
 202         }
 203         HeapFree(GetProcessHeap(), 0, This->notifies);
 204         HeapFree(GetProcessHeap(), 0, This);
 205         TRACE("(%p) released\n", This);
 206     }
 207     return refCount;
 208 }
 209
 210 static HRESULT WINAPI IDsCaptureDriverNotifyImpl_SetNotificationPositions(PIDSDRIVERNOTIFY iface, DWORD howmuch, LPCDSBPOSITIONNOTIFY notify)
 211 {
 212     DWORD len = howmuch * sizeof(DSBPOSITIONNOTIFY);
 213     unsigned i;
 214     LPVOID notifies;
 215     IDsCaptureDriverNotifyImpl *This = (IDsCaptureDriverNotifyImpl *)iface;
 216     TRACE("(%p,0x%08x,%p)\n",This,howmuch,notify);
 217
 218     if (!notify) {
 219         WARN("invalid parameter\n");
 220         return DSERR_INVALIDPARAM;
 221     }
 222
 223     if (TRACE_ON(dsalsa))
 224         for (i=0;i<howmuch; ++i)
 225             TRACE("notify at %d to %p\n", notify[i].dwOffset, notify[i].hEventNotify);
 226
 227     /* **** */
 228     EnterCriticalSection(&This->buffer->pcm_crst);
 229
 230     /* Make an internal copy of the caller-supplied array.
 231      * Replace the existing copy if one is already present. */
 232     if (This->notifies)
 233         notifies = HeapReAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, This->notifies, len);
 234     else
 235         notifies = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, len);
 236
 237     if (!notifies)
 238     {
 239         LeaveCriticalSection(&This->buffer->pcm_crst);
 240         /* **** */
 241         return DSERR_OUTOFMEMORY;
 242     }
 243     This->notifies = notifies;
 244     memcpy(This->notifies, notify, len);
 245     This->nrofnotifies = howmuch;
 246     IDsDriverBuffer_GetPosition((PIDSCDRIVERBUFFER)This->buffer, &This->playpos, NULL);
 247
 248     if (!This->timerID)
 249     {
 250         timeBeginPeriod(DS_TIME_RES);
 251         This->timerID = timeSetEvent(DS_TIME_DEL, DS_TIME_RES, Capture_Notify, (DWORD_PTR)This->buffer, TIME_PERIODIC | TIME_KILL_SYNCHRONOUS);
 252     }
 253
 254     LeaveCriticalSection(&This->buffer->pcm_crst);
 255     /* **** */
 256
 257     return S_OK;
 258 }
 259
 260 static const IDsDriverNotifyVtbl dscdnvt =
 261 {
 262     IDsCaptureDriverNotifyImpl_QueryInterface,
 263     IDsCaptureDriverNotifyImpl_AddRef,
 264     IDsCaptureDriverNotifyImpl_Release,
 265     IDsCaptureDriverNotifyImpl_SetNotificationPositions,
 266 };
 267
 268 #if 0
 269 /** Convert the position an application sees into a position ALSA sees */
 270 static snd_pcm_uframes_t fakepos_to_realpos(const IDsCaptureDriverBufferImpl* This, DWORD fakepos)
 271 {
 272     snd_pcm_uframes_t realpos;
 273     if (fakepos < This->mmap_ofs_bytes)
 274         realpos = This->mmap_buflen_bytes + fakepos - This->mmap_ofs_bytes;
 275     else realpos = fakepos - This->mmap_ofs_bytes;
 276     return snd_pcm_bytes_to_frames(This->pcm, realpos) % This->mmap_buflen_frames;
 277 }
 278 #endif
 279
 280 /** Convert the position ALSA sees into a position an application sees */
 281 static DWORD realpos_to_fakepos(const IDsCaptureDriverBufferImpl* This, snd_pcm_uframes_t realpos)
 282 {
 283     DWORD realposb = snd_pcm_frames_to_bytes(This->pcm, realpos);
 284     return (realposb + This->mmap_ofs_bytes) % This->mmap_buflen_bytes;
 285 }
 286
 287 /** Raw copy data, with buffer wrap around */
 288 static void CopyDataWrap(const IDsCaptureDriverBufferImpl* This, LPBYTE dest, DWORD fromwhere, DWORD copylen, DWORD buflen)
 289 {
 290     DWORD remainder = buflen - fromwhere;
 291     if (remainder >= copylen)
 292     {
 293         CopyMemory(dest, This->mmap_buffer + fromwhere, copylen);
 294     }
 295     else
 296     {
 297         CopyMemory(dest, This->mmap_buffer + fromwhere, remainder);
 298         copylen -= remainder;
 299         CopyMemory(dest, This->mmap_buffer, copylen);
 300     }
 301 }
 302
 303 /** Copy data from the mmap buffer to backbuffer, taking into account all wraparounds that may occur */
 304 static void CopyData(const IDsCaptureDriverBufferImpl* This, snd_pcm_uframes_t fromwhere, snd_pcm_uframes_t len)
 305 {
 306     DWORD dlen = snd_pcm_frames_to_bytes(This->pcm, len) % This->mmap_buflen_bytes;
 307
 308     /* Backbuffer */
 309     DWORD ofs = realpos_to_fakepos(This, fromwhere);
 310     DWORD remainder = This->mmap_buflen_bytes - ofs;
 311
 312     /* MMAP buffer */
 313     DWORD realbuflen = snd_pcm_frames_to_bytes(This->pcm, This->mmap_buflen_frames);
 314     DWORD realofs = snd_pcm_frames_to_bytes(This->pcm, fromwhere);
 315
 316     if (remainder >= dlen)
 317     {
 318        CopyDataWrap(This, This->presented_buffer + ofs, realofs, dlen, realbuflen);
 319     }
 320     else
 321     {
 322        CopyDataWrap(This, This->presented_buffer + ofs, realofs, remainder, realbuflen);
 323        dlen -= remainder;
 324        CopyDataWrap(This, This->presented_buffer, (realofs+remainder)%realbuflen, dlen, realbuflen);
 325     }
 326 }
 327
 328 /** Fill buffers, for starting and stopping
 329  * Alsa won't start playing until everything is filled up
 330  * This also updates mmap_pos
 331  *
 332  * Returns: Amount of periods in use so snd_pcm_avail_update
 333  * doesn't have to be called up to 4x in GetPosition()
 334  */
 335 static snd_pcm_uframes_t CommitAll(IDsCaptureDriverBufferImpl *This, DWORD forced)
 336 {
 337     const snd_pcm_channel_area_t *areas;
 338     snd_pcm_uframes_t used;
 339     const snd_pcm_uframes_t commitahead = This->mmap_buflen_frames;
 340
 341     used = This->mmap_buflen_frames - snd_pcm_avail_update(This->pcm);
 342     TRACE("%p needs to commit to %lu, used: %lu\n", This, commitahead, used);
 343     if (used < commitahead && (forced || This->play_looping))
 344     {
 345         snd_pcm_uframes_t done, putin = commitahead - used;
 346         if (This->mmap)
 347         {
 348             snd_pcm_mmap_begin(This->pcm, &areas, &This->mmap_pos, &putin);
 349             CopyData(This, This->mmap_pos, putin);
 350             done = snd_pcm_mmap_commit(This->pcm, This->mmap_pos, putin);
 351
 352             This->mmap_pos += done;
 353             used += done;
 354             putin = commitahead - used;
 355
 356             if (This->mmap_pos == This->mmap_buflen_frames && (snd_pcm_sframes_t)putin > 0 && This->play_looping)
 357             {
 358                 This->mmap_ofs_bytes += snd_pcm_frames_to_bytes(This->pcm, This->mmap_buflen_frames);
 359                 This->mmap_ofs_bytes %= This->mmap_buflen_bytes;
 360
 361                 snd_pcm_mmap_begin(This->pcm, &areas, &This->mmap_pos, &putin);
 362                 CopyData(This, This->mmap_pos, putin);
 363                 done = snd_pcm_mmap_commit(This->pcm, This->mmap_pos, putin);
 364
 365                 This->mmap_pos += done;
 366                 used += done;
 367             }
 368         }
 369         else
 370         {
 371             DWORD pos;
 372             snd_pcm_sframes_t ret;
 373
 374             snd_pcm_uframes_t cap = snd_pcm_bytes_to_frames(This->pcm, This->mmap_buflen_bytes);
 375             pos = realpos_to_fakepos(This, This->mmap_pos);
 376             if (This->mmap_pos + putin > cap)
 377                 putin = cap - This->mmap_pos;
 378             ret = snd_pcm_readi(This->pcm, This->presented_buffer + pos, putin);
 379             if (ret == -EPIPE)
 380             {
 381                 WARN("Underrun occurred\n");
 382                 snd_pcm_prepare(This->pcm);
 383                 ret = snd_pcm_readi(This->pcm, This->presented_buffer + pos, putin);
 384                 snd_pcm_start(This->pcm);
 385             }
 386             if (ret < 0)
 387             {
 388                 WARN("Committing data: %ld / %s (%ld)\n", ret, snd_strerror(ret), putin);
 389                 ret = 0;
 390             }
 391             This->mmap_pos += ret;
 392             used += ret;
 393             /* At this point mmap_pos may be >= This->mmap_pos this is harmless
 394              * realpos_to_fakepos handles it well, and below it is truncated
 395              */
 396
 397             putin = commitahead - used;
 398             if (putin > 0)
 399             {
 400                 pos = realpos_to_fakepos(This, This->mmap_pos);
 401                 ret = snd_pcm_readi(This->pcm, This->presented_buffer + pos, putin);
 402                 if (ret > 0)
 403                 {
 404                     This->mmap_pos += ret;
 405                     used += ret;
 406                 }
 407             }
 408         }
 409
 410     }
 411
 412     if (This->mmap_pos >= This->mmap_buflen_frames)
 413     {
 414         This->mmap_ofs_bytes += snd_pcm_frames_to_bytes(This->pcm, This->mmap_buflen_frames);
 415         This->mmap_ofs_bytes %= This->mmap_buflen_bytes;
 416         This->mmap_pos -= This->mmap_buflen_frames;
 417     }
 418
 419     return used;
 420 }
 421
 422 static void CheckXRUN(IDsCaptureDriverBufferImpl* This)
 423 {
 424     snd_pcm_state_t state = snd_pcm_state(This->pcm);
 425     snd_pcm_sframes_t delay;
 426     int err;
 427
 428     snd_pcm_hwsync(This->pcm);
 429     snd_pcm_delay(This->pcm, &delay);
 430     if ( state == SND_PCM_STATE_XRUN )
 431     {
 432         err = snd_pcm_prepare(This->pcm);
 433         CommitAll(This, FALSE);
 434         snd_pcm_start(This->pcm);
 435         WARN("xrun occurred\n");
 436         if ( err < 0 )
 437             ERR("recovery from xrun failed, prepare failed: %s\n", snd_strerror(err));
 438     }
 439     else if ( state == SND_PCM_STATE_SUSPENDED )
 440     {
 441         int err = snd_pcm_resume(This->pcm);
 442         TRACE("recovery from suspension occurred\n");
 443         if (err < 0 && err != -EAGAIN){
 444             err = snd_pcm_prepare(This->pcm);
 445             if (err < 0)
 446                 ERR("recovery from suspend failed, prepare failed: %s\n", snd_strerror(err));
 447         }
 448     }
 449     else if ( state != SND_PCM_STATE_RUNNING)
 450     {
 451         WARN("Unhandled state: %d\n", state);
 452     }
 453 }
 454
 455 /**
 456  * Allocate the memory-mapped buffer for direct sound, and set up the
 457  * callback.
 458  */
 459 static int CreateMMAP(IDsCaptureDriverBufferImpl* pdbi)
 460 {
 461     snd_pcm_t *pcm = pdbi->pcm;
 462     snd_pcm_format_t format;
 463     snd_pcm_uframes_t frames, ofs, avail, psize, boundary;
 464     unsigned int channels, bits_per_sample, bits_per_frame;
 465     int err, mmap_mode;
 466     const snd_pcm_channel_area_t *areas;
 467     snd_pcm_hw_params_t *hw_params = pdbi->hw_params;
 468     snd_pcm_sw_params_t *sw_params = pdbi->sw_params;
 469
 470     mmap_mode = snd_pcm_type(pcm);
 471
 472     if (mmap_mode == SND_PCM_TYPE_HW)
 473         TRACE("mmap'd buffer is a direct hardware buffer.\n");
 474     else if (mmap_mode == SND_PCM_TYPE_DMIX)
 475         TRACE("mmap'd buffer is an ALSA dmix buffer\n");
 476     else
 477         TRACE("mmap'd buffer is an ALSA type %d buffer\n", mmap_mode);
 478
 479     err = snd_pcm_hw_params_get_period_size(hw_params, &psize, NULL);
 480     err = snd_pcm_hw_params_get_format(hw_params, &format);
 481     err = snd_pcm_hw_params_get_buffer_size(hw_params, &frames);
 482     err = snd_pcm_hw_params_get_channels(hw_params, &channels);
 483     bits_per_sample = snd_pcm_format_physical_width(format);
 484     bits_per_frame = bits_per_sample * channels;
 485
 486     if (TRACE_ON(dsalsa))
 487         ALSA_TraceParameters(hw_params, NULL, FALSE);
 488
 489     TRACE("format=%s  frames=%ld  channels=%d  bits_per_sample=%d  bits_per_frame=%d\n",
 490           snd_pcm_format_name(format), frames, channels, bits_per_sample, bits_per_frame);
 491
 492     pdbi->mmap_buflen_frames = frames;
 493     snd_pcm_sw_params_current(pcm, sw_params);
 494     snd_pcm_sw_params_set_start_threshold(pcm, sw_params, 0);
 495     snd_pcm_sw_params_get_boundary(sw_params, &boundary);
 496     snd_pcm_sw_params_set_stop_threshold(pcm, sw_params, boundary);
 497     snd_pcm_sw_params_set_silence_threshold(pcm, sw_params, INT_MAX);
 498     snd_pcm_sw_params_set_silence_size(pcm, sw_params, 0);
 499     snd_pcm_sw_params_set_avail_min(pcm, sw_params, 0);
 500     err = snd_pcm_sw_params(pcm, sw_params);
 501
 502     pdbi->mmap_ofs_bytes = 0;
 503     if (!pdbi->mmap)
 504     {
 505         pdbi->mmap_buffer = NULL;
 506
 507         frames = snd_pcm_bytes_to_frames(pdbi->pcm, pdbi->mmap_buflen_bytes);
 508         snd_pcm_format_set_silence(format, pdbi->presented_buffer, frames);
 509         pdbi->mmap_pos = 0;
 510     }
 511     else
 512     {
 513         err = snd_pcm_mmap_begin(pcm, &areas, &ofs, &avail);
 514         if ( err < 0 )
 515         {
 516             ERR("Can't map sound device for direct access: %s/%d\n", snd_strerror(err), err);
 517             return DSERR_GENERIC;
 518         }
 519         snd_pcm_format_set_silence(format, areas->addr, pdbi->mmap_buflen_frames);
 520         pdbi->mmap_pos = ofs + snd_pcm_mmap_commit(pcm, ofs, 0);
 521         pdbi->mmap_buffer = areas->addr;
 522     }
 523
 524     TRACE("created mmap buffer of %ld frames (%d bytes) at %p\n",
 525         pdbi->mmap_buflen_frames, pdbi->mmap_buflen_bytes, pdbi->mmap_buffer);
 526
 527     return DS_OK;
 528 }
 529
 530 static HRESULT WINAPI IDsCaptureDriverBufferImpl_QueryInterface(PIDSCDRIVERBUFFER iface, REFIID riid, LPVOID *ppobj)
 531 {
 532     IDsCaptureDriverBufferImpl *This = (IDsCaptureDriverBufferImpl *)iface;
 533     if ( IsEqualGUID(riid, &IID_IUnknown) ||
 534          IsEqualGUID(riid, &IID_IDsCaptureDriverBuffer) ) {
 535         IDsCaptureDriverBuffer_AddRef(iface);
 536         *ppobj = iface;
 537         return DS_OK;
 538     }
 539
 540     if ( IsEqualGUID( &IID_IDsDriverNotify, riid ) ) {
 541         if (!This->notify)
 542         {
 543             This->notify = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(IDsCaptureDriverNotifyImpl));
 544             if (!This->notify)
 545                 return DSERR_OUTOFMEMORY;
 546             This->notify->lpVtbl = &dscdnvt;
 547             This->notify->buffer = This;
 548
 549             /* Keep a lock on IDsDriverNotify for ourself, so it is destroyed when the buffer is */
 550             IDsDriverNotify_AddRef((PIDSDRIVERNOTIFY)This->notify);
 551         }
 552         IDsDriverNotify_AddRef((PIDSDRIVERNOTIFY)This->notify);
 553         *ppobj = This->notify;
 554         return DS_OK;
 555     }
 556
 557     if ( IsEqualGUID( &IID_IDsDriverPropertySet, riid ) ) {
 558         FIXME("Unsupported interface IID_IDsDriverPropertySet\n");
 559         return E_FAIL;
 560     }
 561
 562     FIXME("(): Unknown interface %s\n", debugstr_guid(riid));
 563     return DSERR_UNSUPPORTED;
 564 }
 565
 566 static ULONG WINAPI IDsCaptureDriverBufferImpl_AddRef(PIDSCDRIVERBUFFER iface)
 567 {
 568     IDsCaptureDriverBufferImpl *This = (IDsCaptureDriverBufferImpl *)iface;
 569     ULONG refCount = InterlockedIncrement(&This->ref);
 570
 571     TRACE("(%p)->(ref before=%u)\n",This, refCount - 1);
 572
 573     return refCount;
 574 }
 575
 576 static ULONG WINAPI IDsCaptureDriverBufferImpl_Release(PIDSCDRIVERBUFFER iface)
 577 {
 578     IDsCaptureDriverBufferImpl *This = (IDsCaptureDriverBufferImpl *)iface;
 579     ULONG refCount = InterlockedDecrement(&This->ref);
 580
 581     TRACE("(%p)->(ref before=%u)\n",This, refCount + 1);
 582
 583     if (refCount)
 584         return refCount;
 585
 586     EnterCriticalSection(&This->pcm_crst);
 587     if (This->notify)
 588         IDsDriverNotify_Release((PIDSDRIVERNOTIFY)This->notify);
 589     TRACE("mmap buffer %p destroyed\n", This->mmap_buffer);
 590
 591     This->drv->capture_buffer = NULL;
 592     LeaveCriticalSection(&This->pcm_crst);
 593     This->pcm_crst.DebugInfo->Spare[0] = 0;
 594     DeleteCriticalSection(&This->pcm_crst);
 595
 596     snd_pcm_drop(This->pcm);
 597     snd_pcm_close(This->pcm);
 598     This->pcm = NULL;
 599     HeapFree(GetProcessHeap(), 0, This->presented_buffer);
 600     HeapFree(GetProcessHeap(), 0, This->sw_params);
 601     HeapFree(GetProcessHeap(), 0, This->hw_params);
 602     HeapFree(GetProcessHeap(), 0, This);
 603     return 0;
 604 }
 605
 606 static HRESULT WINAPI IDsCaptureDriverBufferImpl_Lock(PIDSCDRIVERBUFFER iface, LPVOID*ppvAudio1,LPDWORD pdwLen1,LPVOID*ppvAudio2,LPDWORD pdwLen2, DWORD dwWritePosition,DWORD dwWriteLen, DWORD dwFlags)
 607 {
 608     IDsCaptureDriverBufferImpl *This = (IDsCaptureDriverBufferImpl *)iface;
 609     TRACE("(%p,%p,%p,%p,%p,%d,%d,0x%08x)\n", This, ppvAudio1, pdwLen1, ppvAudio2, pdwLen2, dwWritePosition, dwWriteLen, dwFlags);
 610
 611     if (ppvAudio1)
 612         *ppvAudio1 = (LPBYTE)This->presented_buffer + dwWritePosition;
 613
 614     if (dwWritePosition + dwWriteLen <= This->mmap_buflen_bytes) {
 615         if (pdwLen1)
 616             *pdwLen1 = dwWriteLen;
 617         if (ppvAudio2)
 618             *ppvAudio2 = 0;
 619         if (pdwLen2)
 620             *pdwLen2 = 0;
 621     } else {
 622         if (pdwLen1)
 623             *pdwLen1 = This->mmap_buflen_bytes - dwWritePosition;
 624         if (ppvAudio2)
 625             *ppvAudio2 = This->presented_buffer;
 626         if (pdwLen2)
 627             *pdwLen2 = dwWriteLen - (This->mmap_buflen_bytes - dwWritePosition);
 628     }
 629     return DS_OK;
 630 }
 631
 632 static HRESULT WINAPI IDsCaptureDriverBufferImpl_Unlock(PIDSCDRIVERBUFFER iface, LPVOID pvAudio1,DWORD dwLen1, LPVOID pvAudio2,DWORD dwLen2)
 633 {
 634     IDsCaptureDriverBufferImpl *This = (IDsCaptureDriverBufferImpl *)iface;
 635     TRACE("(%p,%p,%d,%p,%d)\n",This,pvAudio1,dwLen1,pvAudio2,dwLen2);
 636     return DS_OK;
 637 }
 638
 639 static HRESULT WINAPI IDsCaptureDriverBufferImpl_SetFormat(PIDSCDRIVERBUFFER iface, LPWAVEFORMATEX pwfx)
 640 {
 641     IDsCaptureDriverBufferImpl *This = (IDsCaptureDriverBufferImpl *)iface;
 642     WINE_WAVEDEV *wwi = &WInDev[This->drv->wDevID];
 643     snd_pcm_t *pcm = NULL;
 644     snd_pcm_hw_params_t *hw_params = This->hw_params;
 645     snd_pcm_format_t format = -1;
 646     snd_pcm_uframes_t buffer_size;
 647     DWORD rate = pwfx->nSamplesPerSec;
 648     int err=0;
 649     BOOL mmap;
 650
 651     TRACE("(%p, %p)\n", iface, pwfx);
 652
 653     switch (pwfx->wBitsPerSample)
 654     {
 655         case  8: format = SND_PCM_FORMAT_U8; break;
 656         case 16: format = SND_PCM_FORMAT_S16_LE; break;
 657         case 24: format = SND_PCM_FORMAT_S24_3LE; break;
 658         case 32: format = SND_PCM_FORMAT_S32_LE; break;
 659         default: FIXME("Unsupported bpp: %d\n", pwfx->wBitsPerSample); return DSERR_GENERIC;
 660     }
 661
 662     /* **** */
 663     EnterCriticalSection(&This->pcm_crst);
 664
 665     err = snd_pcm_open(&pcm, wwi->pcmname, SND_PCM_STREAM_CAPTURE, SND_PCM_NONBLOCK);
 666
 667     if (err < 0)
 668     {
 669         if (errno != EBUSY || !This->pcm)
 670         {
 671             /* **** */
 672             LeaveCriticalSection(&This->pcm_crst);
 673             WARN("Cannot open sound device: %s\n", snd_strerror(err));
 674             return DSERR_GENERIC;
 675         }
 676         snd_pcm_drop(This->pcm);
 677         snd_pcm_close(This->pcm);
 678         This->pcm = NULL;
 679         err = snd_pcm_open(&pcm, wwi->pcmname, SND_PCM_STREAM_CAPTURE, SND_PCM_NONBLOCK);
 680         if (err < 0)
 681         {
 682             /* **** */
 683             LeaveCriticalSection(&This->pcm_crst);
 684             WARN("Cannot open sound device: %s\n", snd_strerror(err));
 685             return DSERR_BUFFERLOST;
 686         }
 687     }
 688
 689     /* Set some defaults */
 690     snd_pcm_hw_params_any(pcm, hw_params);
 691
 692     err = snd_pcm_hw_params_set_channels(pcm, hw_params, pwfx->nChannels);
 693     if (err < 0) { WARN("Could not set channels to %d\n", pwfx->nChannels); goto err; }
 694
 695     err = snd_pcm_hw_params_set_format(pcm, hw_params, format);
 696     if (err < 0) { WARN("Could not set format to %d bpp\n", pwfx->wBitsPerSample); goto err; }
 697
 698     err = snd_pcm_hw_params_set_rate_near(pcm, hw_params, &rate, NULL);
 699     if (err < 0) { rate = pwfx->nSamplesPerSec; WARN("Could not set rate\n"); goto err; }
 700
 701     if (!ALSA_NearMatch(rate, pwfx->nSamplesPerSec))
 702     {
 703         WARN("Could not set sound rate to %d, but instead to %d\n", pwfx->nSamplesPerSec, rate);
 704         pwfx->nSamplesPerSec = rate;
 705         pwfx->nAvgBytesPerSec = rate * pwfx->nBlockAlign;
 706         /* Let DirectSound detect this */
 707     }
 708
 709     snd_pcm_hw_params_set_periods_integer(pcm, hw_params);
 710     buffer_size = This->mmap_buflen_bytes / pwfx->nBlockAlign;
 711     snd_pcm_hw_params_set_buffer_size_near(pcm, hw_params, &buffer_size);
 712     buffer_size = 5000;
 713     snd_pcm_hw_params_set_period_time_near(pcm, hw_params, (unsigned int*)&buffer_size, NULL);
 714
 715     err = snd_pcm_hw_params_set_access (pcm, hw_params, SND_PCM_ACCESS_MMAP_INTERLEAVED);
 716     if (err < 0)
 717     {
 718         err = snd_pcm_hw_params_set_access (pcm, hw_params, SND_PCM_ACCESS_RW_INTERLEAVED);
 719         if (err < 0) { WARN("Could not set access\n"); goto err; }
 720         mmap = 0;
 721     }
 722     else
 723         mmap = 1;
 724
 725     err = snd_pcm_hw_params(pcm, hw_params);
 726     if (err < 0) { WARN("Could not set hw parameters\n"); goto err; }
 727
 728     if (This->pcm)
 729     {
 730         snd_pcm_drop(This->pcm);
 731         snd_pcm_close(This->pcm);
 732     }
 733     This->pcm = pcm;
 734     This->mmap = mmap;
 735
 736     snd_pcm_prepare(This->pcm);
 737     CreateMMAP(This);
 738
 739     /* **** */
 740     LeaveCriticalSection(&This->pcm_crst);
 741     return S_OK;
 742
 743     err:
 744     if (err < 0)
 745         WARN("Failed to apply changes: %s\n", snd_strerror(err));
 746
 747     if (!This->pcm)
 748         This->pcm = pcm;
 749     else
 750         snd_pcm_close(pcm);
 751
 752     if (This->pcm)
 753         snd_pcm_hw_params_current(This->pcm, This->hw_params);
 754
 755     /* **** */
 756     LeaveCriticalSection(&This->pcm_crst);
 757     return DSERR_BADFORMAT;
 758 }
 759
 760 static HRESULT WINAPI IDsCaptureDriverBufferImpl_GetPosition(PIDSCDRIVERBUFFER iface, LPDWORD lpdwCappos, LPDWORD lpdwReadpos)
 761 {
 762     IDsCaptureDriverBufferImpl *This = (IDsCaptureDriverBufferImpl *)iface;
 763     snd_pcm_uframes_t hw_pptr, hw_wptr;
 764
 765     EnterCriticalSection(&This->pcm_crst);
 766
 767     if (!This->pcm)
 768     {
 769         FIXME("Bad pointer for pcm: %p\n", This->pcm);
 770         LeaveCriticalSection(&This->pcm_crst);
 771         return DSERR_GENERIC;
 772     }
 773
 774     if (snd_pcm_state(This->pcm) != SND_PCM_STATE_RUNNING)
 775     {
 776         CheckXRUN(This);
 777         hw_pptr = This->mmap_pos;
 778     }
 779     else
 780     {
 781         /* FIXME: Unused at the moment */
 782         snd_pcm_uframes_t used = CommitAll(This, FALSE);
 783
 784         if (This->mmap_pos > used)
 785             hw_pptr = This->mmap_pos - used;
 786         else
 787             hw_pptr = This->mmap_buflen_frames - used + This->mmap_pos;
 788     }
 789     hw_wptr = This->mmap_pos;
 790
 791     if (lpdwCappos)
 792         *lpdwCappos = realpos_to_fakepos(This, hw_pptr);
 793     if (lpdwReadpos)
 794         *lpdwReadpos = realpos_to_fakepos(This, hw_wptr);
 795
 796     LeaveCriticalSection(&This->pcm_crst);
 797
 798     TRACE("hw_pptr=%u, hw_wptr=%u playpos=%u(%p), writepos=%u(%p)\n", (unsigned int)hw_pptr, (unsigned int)hw_wptr, realpos_to_fakepos(This, hw_pptr), lpdwCappos, realpos_to_fakepos(This, hw_wptr), lpdwReadpos);
 799     return DS_OK;
 800 }
 801
 802 static HRESULT WINAPI IDsCaptureDriverBufferImpl_GetStatus(PIDSCDRIVERBUFFER iface, LPDWORD lpdwStatus)
 803 {
 804     IDsCaptureDriverBufferImpl *This = (IDsCaptureDriverBufferImpl *)iface;
 805     snd_pcm_state_t state;
 806     TRACE("(%p,%p)\n",iface,lpdwStatus);
 807
 808     state = snd_pcm_state(This->pcm);
 809     switch (state)
 810     {
 811     case SND_PCM_STATE_XRUN:
 812     case SND_PCM_STATE_SUSPENDED:
 813     case SND_PCM_STATE_RUNNING:
 814         *lpdwStatus = DSCBSTATUS_CAPTURING | (This->play_looping ? DSCBSTATUS_LOOPING : 0);
 815         break;
 816     default:
 817         *lpdwStatus = 0;
 818         break;
 819     }
 820
 821     TRACE("State: %d, flags: 0x%08x\n", state, *lpdwStatus);
 822     return DS_OK;
 823 }
 824
 825 static HRESULT WINAPI IDsCaptureDriverBufferImpl_Start(PIDSCDRIVERBUFFER iface, DWORD dwFlags)
 826 {
 827     IDsCaptureDriverBufferImpl *This = (IDsCaptureDriverBufferImpl *)iface;
 828     TRACE("(%p,%x)\n",iface,dwFlags);
 829
 830     /* **** */
 831     EnterCriticalSection(&This->pcm_crst);
 832     snd_pcm_start(This->pcm);
 833     This->play_looping = !!(dwFlags & DSCBSTART_LOOPING);
 834     if (!This->play_looping)
 835         /* Not well supported because of the difference in ALSA size and DSOUND's notion of size
 836          * what it does right now is fill the buffer once.. ALSA size */
 837         FIXME("Non-looping buffers are not properly supported!\n");
 838     CommitAll(This, TRUE);
 839
 840     if (This->notify && This->notify->nrofnotifies && This->notify->notifies)
 841     {
 842         DWORD playpos = realpos_to_fakepos(This, This->mmap_pos);
 843         if (playpos)
 844             Capture_CheckNotify(This->notify, 0, playpos);
 845         This->notify->playpos = playpos;
 846     }
 847
 848     /* **** */
 849     LeaveCriticalSection(&This->pcm_crst);
 850     return DS_OK;
 851 }
 852
 853 static HRESULT WINAPI IDsCaptureDriverBufferImpl_Stop(PIDSCDRIVERBUFFER iface)
 854 {
 855     IDsCaptureDriverBufferImpl *This = (IDsCaptureDriverBufferImpl *)iface;
 856     TRACE("(%p)\n",iface);
 857
 858     /* **** */
 859     EnterCriticalSection(&This->pcm_crst);
 860     This->play_looping = FALSE;
 861     snd_pcm_drop(This->pcm);
 862     snd_pcm_prepare(This->pcm);
 863
 864     if (This->notify && This->notify->notifies && This->notify->nrofnotifies)
 865         Capture_CheckNotify(This->notify, 0, 0);
 866
 867     /* **** */
 868     LeaveCriticalSection(&This->pcm_crst);
 869     return DS_OK;
 870 }
 871
 872 static const IDsCaptureDriverBufferVtbl dsdbvt =
 873 {
 874     IDsCaptureDriverBufferImpl_QueryInterface,
 875     IDsCaptureDriverBufferImpl_AddRef,
 876     IDsCaptureDriverBufferImpl_Release,
 877     IDsCaptureDriverBufferImpl_Lock,
 878     IDsCaptureDriverBufferImpl_Unlock,
 879     IDsCaptureDriverBufferImpl_SetFormat,
 880     IDsCaptureDriverBufferImpl_GetPosition,
 881     IDsCaptureDriverBufferImpl_GetStatus,
 882     IDsCaptureDriverBufferImpl_Start,
 883     IDsCaptureDriverBufferImpl_Stop
 884 };
 885
 886 static HRESULT WINAPI IDsCaptureDriverImpl_QueryInterface(PIDSCDRIVER iface, REFIID riid, LPVOID *ppobj)
 887 {
 888     /* IDsCaptureDriverImpl *This = (IDsCaptureDriverImpl *)iface; */
 889     FIXME("(%p): stub!\n",iface);
 890     return DSERR_UNSUPPORTED;
 891 }
 892
 893 static ULONG WINAPI IDsCaptureDriverImpl_AddRef(PIDSCDRIVER iface)
 894 {
 895     IDsCaptureDriverImpl *This = (IDsCaptureDriverImpl *)iface;
 896     ULONG refCount = InterlockedIncrement(&This->ref);
 897
 898     TRACE("(%p)->(ref before=%u)\n",This, refCount - 1);
 899
 900     return refCount;
 901 }
 902
 903 static ULONG WINAPI IDsCaptureDriverImpl_Release(PIDSCDRIVER iface)
 904 {
 905     IDsCaptureDriverImpl *This = (IDsCaptureDriverImpl *)iface;
 906     ULONG refCount = InterlockedDecrement(&This->ref);
 907
 908     TRACE("(%p)->(ref before=%u)\n",This, refCount + 1);
 909
 910     if (refCount)
 911         return refCount;
 912
 913     HeapFree(GetProcessHeap(), 0, This);
 914     return 0;
 915 }
 916
 917 static HRESULT WINAPI IDsCaptureDriverImpl_GetDriverDesc(PIDSCDRIVER iface, PDSDRIVERDESC pDesc)
 918 {
 919     IDsCaptureDriverImpl *This = (IDsCaptureDriverImpl *)iface;
 920     TRACE("(%p,%p)\n",iface,pDesc);
 921     *pDesc                      = WInDev[This->wDevID].ds_desc;
 922     pDesc->dwFlags              = 0;
 923     pDesc->dnDevNode            = WInDev[This->wDevID].waveDesc.dnDevNode;
 924     pDesc->wVxdId               = 0;
 925     pDesc->wReserved            = 0;
 926     pDesc->ulDeviceNum          = This->wDevID;
 927     pDesc->dwHeapType           = DSDHEAP_NOHEAP;
 928     pDesc->pvDirectDrawHeap     = NULL;
 929     pDesc->dwMemStartAddress    = 0xDEAD0000;
 930     pDesc->dwMemEndAddress      = 0xDEAF0000;
 931     pDesc->dwMemAllocExtra      = 0;
 932     pDesc->pvReserved1          = NULL;
 933     pDesc->pvReserved2          = NULL;
 934     return DS_OK;
 935 }
 936
 937 static HRESULT WINAPI IDsCaptureDriverImpl_Open(PIDSCDRIVER iface)
 938 {
 939     HRESULT hr = S_OK;
 940     IDsCaptureDriverImpl *This = (IDsCaptureDriverImpl *)iface;
 941     int err=0;
 942     snd_pcm_t *pcm = NULL;
 943     snd_pcm_hw_params_t *hw_params;
 944
 945     /* While this is not really needed, it is a good idea to do this,
 946      * to see if sound can be initialized */
 947
 948     hw_params = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, snd_pcm_hw_params_sizeof());
 949     if (!hw_params)
 950     {
 951         hr = DSERR_OUTOFMEMORY;
 952         WARN("--> %08x\n", hr);
 953         return hr;
 954     }
 955
 956     err = snd_pcm_open(&pcm, WInDev[This->wDevID].pcmname, SND_PCM_STREAM_CAPTURE, SND_PCM_NONBLOCK);
 957     if (err < 0) goto err;
 958     err = snd_pcm_hw_params_any(pcm, hw_params);
 959     if (err < 0) goto err;
 960     err = snd_pcm_hw_params_set_access (pcm, hw_params, SND_PCM_ACCESS_MMAP_INTERLEAVED);
 961     if (err < 0)
 962     {
 963         err = snd_pcm_hw_params_set_access (pcm, hw_params, SND_PCM_ACCESS_RW_INTERLEAVED);
 964         if (err < 0) goto err;
 965     }
 966
 967     TRACE("Success\n");
 968     snd_pcm_close(pcm);
 969     HeapFree(GetProcessHeap(), 0, hw_params);
 970     return hr;
 971
 972     err:
 973     hr = DSERR_GENERIC;
 974     WARN("Failed to open device: %s\n", snd_strerror(err));
 975     if (pcm)
 976         snd_pcm_close(pcm);
 977     HeapFree(GetProcessHeap(), 0, hw_params);
 978     WARN("--> %08x\n", hr);
 979     return hr;
 980 }
 981
 982 static HRESULT WINAPI IDsCaptureDriverImpl_Close(PIDSCDRIVER iface)
 983 {
 984     IDsCaptureDriverImpl *This = (IDsCaptureDriverImpl *)iface;
 985     TRACE("(%p) stub, harmless\n",This);
 986     return DS_OK;
 987 }
 988
 989 static HRESULT WINAPI IDsCaptureDriverImpl_GetCaps(PIDSCDRIVER iface, PDSCDRIVERCAPS pCaps)
 990 {
 991     IDsCaptureDriverImpl *This = (IDsCaptureDriverImpl *)iface;
 992     WINE_WAVEDEV *wwi = &WInDev[This->wDevID];
 993     TRACE("(%p,%p)\n",iface,pCaps);
 994     pCaps->dwSize = sizeof(DSCDRIVERCAPS);
 995     pCaps->dwFlags = wwi->ds_caps.dwFlags;
 996     pCaps->dwFormats = wwi->incaps.dwFormats;
 997     pCaps->dwChannels = wwi->incaps.wChannels;
 998     return DS_OK;
 999 }
1000
1001 static HRESULT WINAPI IDsCaptureDriverImpl_CreateCaptureBuffer(PIDSCDRIVER iface,
1002                                                       LPWAVEFORMATEX pwfx,
1003                                                       DWORD dwFlags, DWORD dwCardAddress,
1004                                                       LPDWORD pdwcbBufferSize,
1005                                                       LPBYTE *ppbBuffer,
1006                                                       LPVOID *ppvObj)
1007 {
1008     IDsCaptureDriverImpl *This = (IDsCaptureDriverImpl *)iface;
1009     IDsCaptureDriverBufferImpl** ippdsdb = (IDsCaptureDriverBufferImpl**)ppvObj;
1010     HRESULT err;
1011
1012     TRACE("(%p,%p,%x,%x)\n",iface,pwfx,dwFlags,dwCardAddress);
1013
1014     if (This->capture_buffer)
1015         return DSERR_ALLOCATED;
1016
1017     This->capture_buffer = *ippdsdb = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(IDsCaptureDriverBufferImpl));
1018     if (*ippdsdb == NULL)
1019         return DSERR_OUTOFMEMORY;
1020
1021     (*ippdsdb)->hw_params = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, snd_pcm_hw_params_sizeof());
1022     (*ippdsdb)->sw_params = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, snd_pcm_sw_params_sizeof());
1023     (*ippdsdb)->presented_buffer = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, *pdwcbBufferSize);
1024     if (!(*ippdsdb)->hw_params || !(*ippdsdb)->sw_params || !(*ippdsdb)->presented_buffer)
1025     {
1026         HeapFree(GetProcessHeap(), 0, (*ippdsdb)->sw_params);
1027         HeapFree(GetProcessHeap(), 0, (*ippdsdb)->hw_params);
1028         HeapFree(GetProcessHeap(), 0, (*ippdsdb)->presented_buffer);
1029         return DSERR_OUTOFMEMORY;
1030     }
1031     (*ippdsdb)->lpVtbl = &dsdbvt;
1032     (*ippdsdb)->ref = 1;
1033     (*ippdsdb)->drv = This;
1034     (*ippdsdb)->mmap_buflen_bytes = *pdwcbBufferSize;
1035     InitializeCriticalSection(&(*ippdsdb)->pcm_crst);
1036     (*ippdsdb)->pcm_crst.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": ALSA_DSCAPTURE.pcm_crst");
1037
1038     /* SetFormat initialises pcm */
1039     err = IDsDriverBuffer_SetFormat((IDsDriverBuffer*)*ppvObj, pwfx);
1040     if (FAILED(err))
1041     {
1042         WARN("Error occurred: %08x\n", err);
1043         goto err;
1044     }
1045     *ppbBuffer = (*ippdsdb)->presented_buffer;
1046
1047     /* buffer is ready to go */
1048     TRACE("buffer created at %p\n", *ippdsdb);
1049     return err;
1050
1051     err:
1052     HeapFree(GetProcessHeap(), 0, (*ippdsdb)->presented_buffer);
1053     HeapFree(GetProcessHeap(), 0, (*ippdsdb)->sw_params);
1054     HeapFree(GetProcessHeap(), 0, (*ippdsdb)->hw_params);
1055     HeapFree(GetProcessHeap(), 0, *ippdsdb);
1056     *ippdsdb = NULL;
1057     return err;
1058 }
1059
1060 static const IDsCaptureDriverVtbl dscdvt =
1061 {
1062     IDsCaptureDriverImpl_QueryInterface,
1063     IDsCaptureDriverImpl_AddRef,
1064     IDsCaptureDriverImpl_Release,
1065     IDsCaptureDriverImpl_GetDriverDesc,
1066     IDsCaptureDriverImpl_Open,
1067     IDsCaptureDriverImpl_Close,
1068     IDsCaptureDriverImpl_GetCaps,
1069     IDsCaptureDriverImpl_CreateCaptureBuffer
1070 };
1071
1072 /**************************************************************************
1073  *                              widDsCreate                     [internal]
1074  */
1075 DWORD widDsCreate(UINT wDevID, PIDSCDRIVER* drv)
1076 {
1077     IDsCaptureDriverImpl** idrv = (IDsCaptureDriverImpl**)drv;
1078     TRACE("(%d,%p)\n",wDevID,drv);
1079
1080     *idrv = HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,sizeof(IDsCaptureDriverImpl));
1081     if (!*idrv)
1082         return MMSYSERR_NOMEM;
1083     (*idrv)->lpVtbl     = &dscdvt;
1084     (*idrv)->ref        = 1;
1085
1086     (*idrv)->wDevID     = wDevID;
1087     return MMSYSERR_NOERROR;
1088 }
1089
1090 /**************************************************************************
1091  *                              widDsDesc                       [internal]
1092  */
1093 DWORD widDsDesc(UINT wDevID, PDSDRIVERDESC desc)
1094 {
1095     *desc = WInDev[wDevID].ds_desc;
1096     return MMSYSERR_NOERROR;
1097 }
1098
1099 #endif /* HAVE_ALSA */