git.oblomov.eu Git - wine/blob - 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 <stdarg.h>
  34 #include <stdio.h>
  35 #include <string.h>
  36 #ifdef HAVE_UNISTD_H
  37 # include <unistd.h>
  38 #endif
  39 #include <errno.h>
  40 #include <limits.h>
  41 #include <fcntl.h>
  42 #ifdef HAVE_SYS_IOCTL_H
  43 # include <sys/ioctl.h>
  44 #endif
  45 #ifdef HAVE_SYS_MMAN_H
  46 # include <sys/mman.h>
  47 #endif
  48 #include "windef.h"
  49 #include "winbase.h"
  50 #include "wingdi.h"
  51 #include "winerror.h"
  52 #include "winuser.h"
  53 #include "winnls.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(wave);
  64 WINE_DECLARE_DEBUG_CHANNEL(waveloop);
  65
  66 typedef struct IDsDriverImpl IDsDriverImpl;
  67 typedef struct IDsDriverBufferImpl IDsDriverBufferImpl;
  68
  69 struct IDsDriverImpl
  70 {
  71     /* IUnknown fields */
  72     const IDsDriverVtbl *lpVtbl;
  73     LONG                ref;
  74     /* IDsDriverImpl fields */
  75     UINT                wDevID;
  76     IDsDriverBufferImpl*primary;
  77 };
  78
  79 struct IDsDriverBufferImpl
  80 {
  81     /* IUnknown fields */
  82     const IDsDriverBufferVtbl *lpVtbl;
  83     LONG                      ref;
  84     /* IDsDriverBufferImpl fields */
  85     IDsDriverImpl*            drv;
  86
  87     LPVOID                    mmap_buffer;
  88     DWORD                     mmap_buflen_bytes;
  89     snd_pcm_uframes_t         mmap_buflen_frames;
  90     snd_pcm_channel_area_t *  mmap_areas;
  91     snd_pcm_uframes_t         mmap_ppos; /* play position */
  92     snd_pcm_uframes_t         mmap_wpos; /* write position */
  93     HANDLE                    mmap_thread;
  94     ALSA_MSG_RING             mmap_ring; /* sync object */
  95 };
  96
  97 static void DSDB_CheckXRUN(IDsDriverBufferImpl* pdbi)
  98 {
  99     WINE_WAVEDEV *     wwo = &(WOutDev[pdbi->drv->wDevID]);
 100     snd_pcm_state_t    state = snd_pcm_state(wwo->pcm);
 101     snd_pcm_avail_update(wwo->pcm);
 102
 103     if ( state == SND_PCM_STATE_XRUN )
 104     {
 105         int err = snd_pcm_prepare(wwo->pcm);
 106         WARN_(waveloop)("xrun occurred\n");
 107         if ( err < 0 )
 108             ERR("recovery from xrun failed, prepare failed: %s\n", snd_strerror(err));
 109     }
 110     else if ( state == SND_PCM_STATE_SUSPENDED )
 111     {
 112         int err = snd_pcm_resume(wwo->pcm);
 113         TRACE_(waveloop)("recovery from suspension occurred\n");
 114         if (err < 0 && err != -EAGAIN){
 115             err = snd_pcm_prepare(wwo->pcm);
 116             if (err < 0)
 117                 ERR("recovery from suspend failed, prepare failed: %s\n", snd_strerror(err));
 118         }
 119     } else if ( state != SND_PCM_STATE_RUNNING ) {
 120         WARN_(waveloop)("Unhandled state: %d\n", state);
 121     }
 122 }
 123
 124 /**
 125  * The helper thread for DirectSound
 126  *
 127  * Basically it does an infinite loop until it is told to die
 128  *
 129  * snd_pcm_wait() is a call that polls the sound buffer and waits
 130  * until there is at least 1 period free before it returns.
 131  *
 132  * We then commit the buffer filled by the owner of this
 133  * IDSDriverBuffer */
 134 static DWORD CALLBACK DBSB_MMAPLoop(LPVOID data)
 135 {
 136     IDsDriverBufferImpl* pdbi = (IDsDriverBufferImpl*)data;
 137     WINE_WAVEDEV *wwo = &(WOutDev[pdbi->drv->wDevID]);
 138     snd_pcm_uframes_t frames, wanted, ofs;
 139     const snd_pcm_channel_area_t *areas;
 140     int state = WINE_WS_STOPPED;
 141     snd_pcm_state_t alsastate;
 142
 143     TRACE_(waveloop)("0x%8p\n", data);
 144     TRACE("0x%8p, framelength: %lu, area: %8p\n", data, pdbi->mmap_buflen_frames, pdbi->mmap_areas);
 145
 146     do {
 147         enum win_wm_message msg;
 148         DWORD param;
 149         HANDLE hEvent;
 150         int err;
 151         snd_pcm_format_t format;
 152
 153         if (state != WINE_WS_PLAYING)
 154         {
 155             ALSA_WaitRingMessage(&pdbi->mmap_ring, 1000000);
 156             ALSA_RetrieveRingMessage(&pdbi->mmap_ring, &msg, &param, &hEvent);
 157         }
 158         else
 159         while (!ALSA_RetrieveRingMessage(&pdbi->mmap_ring, &msg, &param, &hEvent))
 160         {
 161             snd_pcm_wait(wwo->pcm, -1);
 162             DSDB_CheckXRUN(pdbi);
 163
 164             wanted = frames = pdbi->mmap_buflen_frames;
 165
 166             err = snd_pcm_mmap_begin(wwo->pcm, &areas, &ofs, &frames);
 167             snd_pcm_mmap_commit(wwo->pcm, ofs, frames);
 168
 169             /* mark our current play position */
 170             pdbi->mmap_ppos = ofs;
 171             TRACE_(waveloop)("Updated position to %lx [%d, 0x%8p, %lu]\n", ofs, err, areas, frames);
 172             /* Check to make sure we committed all we want to commit. ALSA
 173              * only gives a contiguous linear region, so we need to check this
 174              * in case we've reached the end of the buffer, in which case we
 175              * can wrap around back to the beginning. */
 176             if (frames < wanted) {
 177                 frames = wanted - frames;
 178                 snd_pcm_mmap_begin(wwo->pcm, &areas, &ofs, &frames);
 179                 snd_pcm_mmap_commit(wwo->pcm, ofs, frames);
 180             }
 181             wanted = 0;
 182             snd_pcm_mmap_begin(wwo->pcm, &areas, &ofs, &wanted);
 183             snd_pcm_mmap_commit(wwo->pcm, ofs, wanted);
 184             pdbi->mmap_wpos = ofs;
 185         }
 186
 187         switch (msg) {
 188         case WINE_WM_STARTING:
 189             if (state == WINE_WS_PLAYING)
 190                 break;
 191
 192             alsastate = snd_pcm_state(wwo->pcm);
 193             if ( alsastate == SND_PCM_STATE_SETUP )
 194             {
 195                 err = snd_pcm_prepare(wwo->pcm);
 196                 alsastate = snd_pcm_state(wwo->pcm);
 197             }
 198
 199             snd_pcm_avail_update(wwo->pcm);
 200
 201             /* Rewind, and initialise */
 202             frames = 0;
 203             snd_pcm_mmap_begin(wwo->pcm, &areas, &ofs, &frames);
 204             snd_pcm_mmap_commit(wwo->pcm, ofs, frames);
 205             snd_pcm_rewind(wwo->pcm, ofs);
 206             snd_pcm_hw_params_get_format(wwo->hw_params, &format);
 207             snd_pcm_format_set_silence(format, pdbi->mmap_buffer, pdbi->mmap_buflen_frames);
 208             pdbi->mmap_ppos = 0;
 209             snd_pcm_hw_params_get_period_size(wwo->hw_params, &wanted, NULL);
 210             pdbi->mmap_wpos = 2*wanted;
 211             if ( alsastate == SND_PCM_STATE_PREPARED )
 212             {
 213                 err = snd_pcm_start(wwo->pcm);
 214                 TRACE("Starting 0x%8p err: %d\n", wwo->pcm, err);
 215             }
 216             state = WINE_WS_PLAYING;
 217             break;
 218
 219         case WINE_WM_STOPPING:
 220             state = WINE_WS_STOPPED;
 221             snd_pcm_drop(wwo->pcm);
 222             break;
 223
 224         case WINE_WM_CLOSING:
 225             if (wwo->pcm != NULL)
 226                 snd_pcm_drop(wwo->pcm);
 227             pdbi->mmap_thread = NULL;
 228             SetEvent(hEvent);
 229             goto out;
 230         default:
 231             ERR("Unhandled event %s\n", ALSA_getCmdString(msg));
 232             break;
 233         }
 234         if (hEvent != INVALID_HANDLE_VALUE)
 235             SetEvent(hEvent);
 236     } while (1);
 237 out:
 238     TRACE_(waveloop)("Destroyed MMAP thread\n");
 239     TRACE("Destroyed MMAP thread\n");
 240     return 0;
 241 }
 242
 243 /**
 244  * Allocate the memory-mapped buffer for direct sound, and set up the
 245  * callback.
 246  */
 247 static int DSDB_CreateMMAP(IDsDriverBufferImpl* pdbi)
 248 {
 249     WINE_WAVEDEV *     wwo = &(WOutDev[pdbi->drv->wDevID]);
 250     snd_pcm_format_t   format;
 251     snd_pcm_uframes_t  frames, ofs, avail, psize;
 252     unsigned int       channels, bits_per_sample, bits_per_frame;
 253     int                err, mmap_mode;
 254
 255     mmap_mode = snd_pcm_type(wwo->pcm);
 256
 257     ALSA_InitRingMessage(&pdbi->mmap_ring);
 258
 259     if (mmap_mode == SND_PCM_TYPE_HW) {
 260         TRACE("mmap'd buffer is a hardware buffer.\n");
 261     }
 262     else {
 263 #if 0 /* Horribly hack, shouldn't be used */
 264         err = snd_pcm_hw_params_get_period_size(wwo->hw_params, &psize, NULL);
 265         /* Set only a buffer of 2 period sizes, to decrease latency */
 266         if (err >= 0)
 267             err = snd_pcm_hw_params_set_buffer_size_near(wwo->pcm, wwo->hw_params, &psize);
 268
 269         psize *= 2;
 270         if (err < 0) {
 271             ERR("Errno %d (%s) occurred when setting buffer size\n", err, strerror(errno));
 272         }
 273 #endif
 274         TRACE("mmap'd buffer is an ALSA emulation of hardware buffer.\n");
 275     }
 276
 277     err = snd_pcm_hw_params_get_period_size(wwo->hw_params, &psize, NULL);
 278     err = snd_pcm_hw_params_get_format(wwo->hw_params, &format);
 279     err = snd_pcm_hw_params_get_buffer_size(wwo->hw_params, &frames);
 280     err = snd_pcm_hw_params_get_channels(wwo->hw_params, &channels);
 281     bits_per_sample = snd_pcm_format_physical_width(format);
 282     bits_per_frame = bits_per_sample * channels;
 283
 284     if (TRACE_ON(wave))
 285         ALSA_TraceParameters(wwo->hw_params, NULL, FALSE);
 286
 287     TRACE("format=%s  frames=%ld  channels=%d  bits_per_sample=%d  bits_per_frame=%d\n",
 288           snd_pcm_format_name(format), frames, channels, bits_per_sample, bits_per_frame);
 289
 290     pdbi->mmap_buflen_frames = frames;
 291     pdbi->mmap_buflen_bytes = snd_pcm_frames_to_bytes( wwo->pcm, frames );
 292
 293     avail = snd_pcm_avail_update(wwo->pcm);
 294     if (avail < 0)
 295     {
 296         ERR("No buffer is available: %s.\n", snd_strerror(avail));
 297         return DSERR_GENERIC;
 298     }
 299     err = snd_pcm_mmap_begin(wwo->pcm, (const snd_pcm_channel_area_t **)&pdbi->mmap_areas, &ofs, &avail);
 300     if ( err < 0 )
 301     {
 302         ERR("Can't map sound device for direct access: %s\n", snd_strerror(err));
 303         return DSERR_GENERIC;
 304     }
 305     avail = 0;/* We don't have any data to commit yet */
 306     err = snd_pcm_mmap_commit(wwo->pcm, ofs, avail);
 307     if (ofs > 0)
 308         err = snd_pcm_rewind(wwo->pcm, ofs);
 309     pdbi->mmap_buffer = pdbi->mmap_areas->addr;
 310     pdbi->mmap_thread = NULL;
 311
 312     TRACE("created mmap buffer of %ld frames (%d bytes) at %p\n",
 313         frames, pdbi->mmap_buflen_bytes, pdbi->mmap_buffer);
 314
 315     return DS_OK;
 316 }
 317
 318 static HRESULT WINAPI IDsDriverBufferImpl_QueryInterface(PIDSDRIVERBUFFER iface, REFIID riid, LPVOID *ppobj)
 319 {
 320     /* IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface; */
 321     FIXME("(): stub!\n");
 322     return DSERR_UNSUPPORTED;
 323 }
 324
 325 static ULONG WINAPI IDsDriverBufferImpl_AddRef(PIDSDRIVERBUFFER iface)
 326 {
 327     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
 328     ULONG refCount = InterlockedIncrement(&This->ref);
 329
 330     TRACE("(%p)->(ref before=%u)\n",This, refCount - 1);
 331
 332     return refCount;
 333 }
 334
 335 static ULONG WINAPI IDsDriverBufferImpl_Release(PIDSDRIVERBUFFER iface)
 336 {
 337     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
 338     ULONG refCount = InterlockedDecrement(&This->ref);
 339
 340     TRACE("(%p)->(ref before=%u)\n",This, refCount + 1);
 341
 342     if (refCount)
 343         return refCount;
 344
 345     if (This->mmap_thread != NULL)
 346         ALSA_AddRingMessage(&This->mmap_ring, WINE_WM_CLOSING, 0, 1);
 347
 348     TRACE("mmap buffer %p destroyed\n", This->mmap_buffer);
 349     ALSA_DestroyRingMessage(&This->mmap_ring);
 350
 351     if (This == This->drv->primary)
 352         This->drv->primary = NULL;
 353     HeapFree(GetProcessHeap(), 0, This);
 354     return 0;
 355 }
 356
 357 static HRESULT WINAPI IDsDriverBufferImpl_Lock(PIDSDRIVERBUFFER iface,
 358                                                LPVOID*ppvAudio1,LPDWORD pdwLen1,
 359                                                LPVOID*ppvAudio2,LPDWORD pdwLen2,
 360                                                DWORD dwWritePosition,DWORD dwWriteLen,
 361                                                DWORD dwFlags)
 362 {
 363     /* IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface; */
 364     TRACE("(%p)\n",iface);
 365     return DSERR_UNSUPPORTED;
 366 }
 367
 368 static HRESULT WINAPI IDsDriverBufferImpl_Unlock(PIDSDRIVERBUFFER iface,
 369                                                  LPVOID pvAudio1,DWORD dwLen1,
 370                                                  LPVOID pvAudio2,DWORD dwLen2)
 371 {
 372     /* IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface; */
 373     TRACE("(%p)\n",iface);
 374     return DSERR_UNSUPPORTED;
 375 }
 376
 377 static HRESULT WINAPI IDsDriverBufferImpl_SetFormat(PIDSDRIVERBUFFER iface,
 378                                                     LPWAVEFORMATEX pwfx)
 379 {
 380     /* IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface; */
 381     TRACE("(%p,%p)\n",iface,pwfx);
 382     return DSERR_BUFFERLOST;
 383 }
 384
 385 static HRESULT WINAPI IDsDriverBufferImpl_SetFrequency(PIDSDRIVERBUFFER iface, DWORD dwFreq)
 386 {
 387     /* IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface; */
 388     TRACE("(%p,%d): stub\n",iface,dwFreq);
 389     return DSERR_UNSUPPORTED;
 390 }
 391
 392 static HRESULT WINAPI IDsDriverBufferImpl_SetVolumePan(PIDSDRIVERBUFFER iface, PDSVOLUMEPAN pVolPan)
 393 {
 394     DWORD vol;
 395     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
 396     TRACE("(%p,%p)\n",iface,pVolPan);
 397     vol = pVolPan->dwTotalLeftAmpFactor | (pVolPan->dwTotalRightAmpFactor << 16);
 398
 399     if (wodSetVolume(This->drv->wDevID, vol) != MMSYSERR_NOERROR) {
 400         WARN("wodSetVolume failed\n");
 401         return DSERR_INVALIDPARAM;
 402     }
 403
 404     return DS_OK;
 405 }
 406
 407 static HRESULT WINAPI IDsDriverBufferImpl_SetPosition(PIDSDRIVERBUFFER iface, DWORD dwNewPos)
 408 {
 409     /* IDsDriverImpl *This = (IDsDriverImpl *)iface; */
 410     FIXME("(%p,%d): stub\n",iface,dwNewPos);
 411     return DSERR_UNSUPPORTED;
 412 }
 413
 414 static HRESULT WINAPI IDsDriverBufferImpl_GetPosition(PIDSDRIVERBUFFER iface,
 415                                                       LPDWORD lpdwPlay, LPDWORD lpdwWrite)
 416 {
 417     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
 418     WINE_WAVEDEV *      wwo = &(WOutDev[This->drv->wDevID]);
 419     snd_pcm_uframes_t   hw_pptr, hw_wptr;
 420     snd_pcm_state_t     state;
 421
 422     if (wwo->hw_params == NULL || wwo->pcm == NULL) return DSERR_GENERIC;
 423
 424 #if 0 /* Shouldn't be needed */
 425     /* we need to track down buffer underruns */
 426     DSDB_CheckXRUN(This);
 427 #endif
 428
 429     state = snd_pcm_state(wwo->pcm);
 430     if (state == SND_PCM_STATE_RUNNING)
 431     {
 432         hw_pptr = This->mmap_ppos;
 433         hw_wptr = This->mmap_wpos;
 434     }
 435     else
 436         hw_pptr = hw_wptr = 0;
 437
 438     if (lpdwPlay)
 439         *lpdwPlay = snd_pcm_frames_to_bytes(wwo->pcm, hw_pptr) % This->mmap_buflen_bytes;
 440     if (lpdwWrite)
 441         *lpdwWrite = snd_pcm_frames_to_bytes(wwo->pcm, hw_wptr) % This->mmap_buflen_bytes;
 442
 443     TRACE_(waveloop)("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);
 444     return DS_OK;
 445 }
 446
 447 static HRESULT WINAPI IDsDriverBufferImpl_Play(PIDSDRIVERBUFFER iface, DWORD dwRes1, DWORD dwRes2, DWORD dwFlags)
 448 {
 449     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
 450
 451     TRACE("(%p,%x,%x,%x)\n",iface,dwRes1,dwRes2,dwFlags);
 452
 453     if (This->mmap_thread == NULL)
 454         This->mmap_thread = CreateThread(NULL, 0, DBSB_MMAPLoop, (LPVOID)(DWORD)This, 0, NULL);
 455
 456     if (This->mmap_thread == NULL)
 457         ERR("Cannot create sound thread, don't expect any sound at all\n");
 458     else
 459         ALSA_AddRingMessage(&This->mmap_ring, WINE_WM_STARTING, 0, 1);
 460
 461     return DS_OK;
 462 }
 463
 464 static HRESULT WINAPI IDsDriverBufferImpl_Stop(PIDSDRIVERBUFFER iface)
 465 {
 466     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
 467
 468     TRACE("(%p)\n",iface);
 469
 470     if (This->mmap_thread != NULL)
 471         ALSA_AddRingMessage(&This->mmap_ring, WINE_WM_STOPPING, 0, 1);
 472
 473     return DS_OK;
 474 }
 475
 476 static const IDsDriverBufferVtbl dsdbvt =
 477 {
 478     IDsDriverBufferImpl_QueryInterface,
 479     IDsDriverBufferImpl_AddRef,
 480     IDsDriverBufferImpl_Release,
 481     IDsDriverBufferImpl_Lock,
 482     IDsDriverBufferImpl_Unlock,
 483     IDsDriverBufferImpl_SetFormat,
 484     IDsDriverBufferImpl_SetFrequency,
 485     IDsDriverBufferImpl_SetVolumePan,
 486     IDsDriverBufferImpl_SetPosition,
 487     IDsDriverBufferImpl_GetPosition,
 488     IDsDriverBufferImpl_Play,
 489     IDsDriverBufferImpl_Stop
 490 };
 491
 492 static HRESULT WINAPI IDsDriverImpl_QueryInterface(PIDSDRIVER iface, REFIID riid, LPVOID *ppobj)
 493 {
 494     /* IDsDriverImpl *This = (IDsDriverImpl *)iface; */
 495     FIXME("(%p): stub!\n",iface);
 496     return DSERR_UNSUPPORTED;
 497 }
 498
 499 static ULONG WINAPI IDsDriverImpl_AddRef(PIDSDRIVER iface)
 500 {
 501     IDsDriverImpl *This = (IDsDriverImpl *)iface;
 502     ULONG refCount = InterlockedIncrement(&This->ref);
 503
 504     TRACE("(%p)->(ref before=%u)\n",This, refCount - 1);
 505
 506     return refCount;
 507 }
 508
 509 static ULONG WINAPI IDsDriverImpl_Release(PIDSDRIVER iface)
 510 {
 511     IDsDriverImpl *This = (IDsDriverImpl *)iface;
 512     ULONG refCount = InterlockedDecrement(&This->ref);
 513
 514     TRACE("(%p)->(ref before=%u)\n",This, refCount + 1);
 515
 516     if (refCount)
 517         return refCount;
 518     HeapFree(GetProcessHeap(),0,This);
 519     return 0;
 520 }
 521
 522 static HRESULT WINAPI IDsDriverImpl_GetDriverDesc(PIDSDRIVER iface, PDSDRIVERDESC pDesc)
 523 {
 524     IDsDriverImpl *This = (IDsDriverImpl *)iface;
 525     TRACE("(%p,%p)\n",iface,pDesc);
 526     memcpy(pDesc, &(WOutDev[This->wDevID].ds_desc), sizeof(DSDRIVERDESC));
 527     pDesc->dwFlags = DSDDESC_DOMMSYSTEMOPEN | DSDDESC_DOMMSYSTEMSETFORMAT |
 528         DSDDESC_USESYSTEMMEMORY | DSDDESC_DONTNEEDPRIMARYLOCK;
 529     pDesc->dnDevNode            = WOutDev[This->wDevID].waveDesc.dnDevNode;
 530     pDesc->wVxdId               = 0;
 531     pDesc->wReserved            = 0;
 532     pDesc->ulDeviceNum          = This->wDevID;
 533     pDesc->dwHeapType           = DSDHEAP_NOHEAP;
 534     pDesc->pvDirectDrawHeap     = NULL;
 535     pDesc->dwMemStartAddress    = 0;
 536     pDesc->dwMemEndAddress      = 0;
 537     pDesc->dwMemAllocExtra      = 0;
 538     pDesc->pvReserved1          = NULL;
 539     pDesc->pvReserved2          = NULL;
 540     return DS_OK;
 541 }
 542
 543 static HRESULT WINAPI IDsDriverImpl_Open(PIDSDRIVER iface)
 544 {
 545     /* IDsDriverImpl *This = (IDsDriverImpl *)iface; */
 546     TRACE("(%p)\n",iface);
 547     return DS_OK;
 548 }
 549
 550 static HRESULT WINAPI IDsDriverImpl_Close(PIDSDRIVER iface)
 551 {
 552     /* IDsDriverImpl *This = (IDsDriverImpl *)iface; */
 553     TRACE("(%p)\n",iface);
 554     return DS_OK;
 555 }
 556
 557 static HRESULT WINAPI IDsDriverImpl_GetCaps(PIDSDRIVER iface, PDSDRIVERCAPS pCaps)
 558 {
 559     IDsDriverImpl *This = (IDsDriverImpl *)iface;
 560     TRACE("(%p,%p)\n",iface,pCaps);
 561     memcpy(pCaps, &(WOutDev[This->wDevID].ds_caps), sizeof(DSDRIVERCAPS));
 562     return DS_OK;
 563 }
 564
 565 static HRESULT WINAPI IDsDriverImpl_CreateSoundBuffer(PIDSDRIVER iface,
 566                                                       LPWAVEFORMATEX pwfx,
 567                                                       DWORD dwFlags, DWORD dwCardAddress,
 568                                                       LPDWORD pdwcbBufferSize,
 569                                                       LPBYTE *ppbBuffer,
 570                                                       LPVOID *ppvObj)
 571 {
 572     IDsDriverImpl *This = (IDsDriverImpl *)iface;
 573     IDsDriverBufferImpl** ippdsdb = (IDsDriverBufferImpl**)ppvObj;
 574     int err;
 575
 576     TRACE("(%p,%p,%x,%x)\n",iface,pwfx,dwFlags,dwCardAddress);
 577     /* we only support primary buffers */
 578     if (!(dwFlags & DSBCAPS_PRIMARYBUFFER))
 579         return DSERR_UNSUPPORTED;
 580     if (This->primary)
 581         return DSERR_ALLOCATED;
 582     if (dwFlags & (DSBCAPS_CTRLFREQUENCY | DSBCAPS_CTRLPAN))
 583         return DSERR_CONTROLUNAVAIL;
 584
 585     *ippdsdb = HeapAlloc(GetProcessHeap(),0,sizeof(IDsDriverBufferImpl));
 586     if (*ippdsdb == NULL)
 587         return DSERR_OUTOFMEMORY;
 588     (*ippdsdb)->lpVtbl  = &dsdbvt;
 589     (*ippdsdb)->ref     = 1;
 590     (*ippdsdb)->drv     = This;
 591
 592     err = DSDB_CreateMMAP((*ippdsdb));
 593     if ( err != DS_OK )
 594      {
 595         HeapFree(GetProcessHeap(), 0, *ippdsdb);
 596         *ippdsdb = NULL;
 597         return err;
 598      }
 599     *ppbBuffer = (*ippdsdb)->mmap_buffer;
 600     *pdwcbBufferSize = (*ippdsdb)->mmap_buflen_bytes;
 601
 602     This->primary = *ippdsdb;
 603
 604     /* buffer is ready to go */
 605     TRACE("buffer created at %p\n", *ippdsdb);
 606     return DS_OK;
 607 }
 608
 609 static HRESULT WINAPI IDsDriverImpl_DuplicateSoundBuffer(PIDSDRIVER iface,
 610                                                          PIDSDRIVERBUFFER pBuffer,
 611                                                          LPVOID *ppvObj)
 612 {
 613     /* IDsDriverImpl *This = (IDsDriverImpl *)iface; */
 614     TRACE("(%p,%p): stub\n",iface,pBuffer);
 615     return DSERR_INVALIDCALL;
 616 }
 617
 618 static const IDsDriverVtbl dsdvt =
 619 {
 620     IDsDriverImpl_QueryInterface,
 621     IDsDriverImpl_AddRef,
 622     IDsDriverImpl_Release,
 623     IDsDriverImpl_GetDriverDesc,
 624     IDsDriverImpl_Open,
 625     IDsDriverImpl_Close,
 626     IDsDriverImpl_GetCaps,
 627     IDsDriverImpl_CreateSoundBuffer,
 628     IDsDriverImpl_DuplicateSoundBuffer
 629 };
 630
 631 DWORD wodDsCreate(UINT wDevID, PIDSDRIVER* drv)
 632 {
 633     IDsDriverImpl** idrv = (IDsDriverImpl**)drv;
 634
 635     TRACE("driver created\n");
 636
 637     /* the HAL isn't much better than the HEL if we can't do mmap() */
 638     if (!(WOutDev[wDevID].outcaps.dwSupport & WAVECAPS_DIRECTSOUND)) {
 639         ERR("DirectSound flag not set\n");
 640         MESSAGE("This sound card's driver does not support direct access\n");
 641         MESSAGE("The (slower) DirectSound HEL mode will be used instead.\n");
 642         return MMSYSERR_NOTSUPPORTED;
 643     }
 644
 645     *idrv = HeapAlloc(GetProcessHeap(),0,sizeof(IDsDriverImpl));
 646     if (!*idrv)
 647         return MMSYSERR_NOMEM;
 648     (*idrv)->lpVtbl     = &dsdvt;
 649     (*idrv)->ref        = 1;
 650
 651     (*idrv)->wDevID     = wDevID;
 652     (*idrv)->primary    = NULL;
 653     return MMSYSERR_NOERROR;
 654 }
 655
 656 DWORD wodDsDesc(UINT wDevID, PDSDRIVERDESC desc)
 657 {
 658     memcpy(desc, &(WOutDev[wDevID].ds_desc), sizeof(DSDRIVERDESC));
 659     return MMSYSERR_NOERROR;
 660 }
 661
 662 #endif /* HAVE_ALSA */