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