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     if (areas != pdbi->mmap_areas || areas->addr != pdbi->mmap_areas->addr)
 147         FIXME("Can't access sound driver's buffer directly.\n");
 148
 149     do {
 150         enum win_wm_message msg;
 151         DWORD param;
 152         HANDLE hEvent;
 153         int err;
 154         snd_pcm_format_t format;
 155
 156         if (state != WINE_WS_PLAYING)
 157         {
 158             ALSA_WaitRingMessage(&pdbi->mmap_ring, 1000000);
 159             ALSA_RetrieveRingMessage(&pdbi->mmap_ring, &msg, &param, &hEvent);
 160         }
 161         else
 162         while (!ALSA_RetrieveRingMessage(&pdbi->mmap_ring, &msg, &param, &hEvent))
 163         {
 164             snd_pcm_wait(wwo->pcm, -1);
 165             DSDB_CheckXRUN(pdbi);
 166
 167             wanted = frames = pdbi->mmap_buflen_frames;
 168
 169             err = snd_pcm_mmap_begin(wwo->pcm, &areas, &ofs, &frames);
 170             snd_pcm_mmap_commit(wwo->pcm, ofs, frames);
 171
 172             /* mark our current play position */
 173             pdbi->mmap_ppos = ofs;
 174             TRACE_(waveloop)("Updated position to %lx [%d, 0x%8p, %lu]\n", ofs, err, areas, frames);
 175             /* Check to make sure we committed all we want to commit. ALSA
 176              * only gives a contiguous linear region, so we need to check this
 177              * in case we've reached the end of the buffer, in which case we
 178              * can wrap around back to the beginning. */
 179             if (frames < wanted) {
 180                 frames = wanted - frames;
 181                 snd_pcm_mmap_begin(wwo->pcm, &areas, &ofs, &frames);
 182                 snd_pcm_mmap_commit(wwo->pcm, ofs, frames);
 183             }
 184             wanted = 0;
 185             snd_pcm_mmap_begin(wwo->pcm, &areas, &ofs, &wanted);
 186             snd_pcm_mmap_commit(wwo->pcm, ofs, wanted);
 187             pdbi->mmap_wpos = ofs;
 188         }
 189
 190         switch (msg) {
 191         case WINE_WM_STARTING:
 192             if (state == WINE_WS_PLAYING)
 193                 break;
 194
 195             alsastate = snd_pcm_state(wwo->pcm);
 196             if ( alsastate == SND_PCM_STATE_SETUP )
 197             {
 198                 err = snd_pcm_prepare(wwo->pcm);
 199                 alsastate = snd_pcm_state(wwo->pcm);
 200             }
 201
 202             snd_pcm_avail_update(wwo->pcm);
 203
 204             /* Rewind, and initialise */
 205             frames = 0;
 206             snd_pcm_mmap_begin(wwo->pcm, &areas, &ofs, &frames);
 207             snd_pcm_mmap_commit(wwo->pcm, ofs, frames);
 208             snd_pcm_rewind(wwo->pcm, ofs);
 209             snd_pcm_hw_params_get_format(wwo->hw_params, &format);
 210             snd_pcm_format_set_silence(format, pdbi->mmap_buffer, pdbi->mmap_buflen_frames);
 211             pdbi->mmap_ppos = 0;
 212             snd_pcm_hw_params_get_period_size(wwo->hw_params, &wanted, NULL);
 213             pdbi->mmap_wpos = 2*wanted;
 214             if ( alsastate == SND_PCM_STATE_PREPARED )
 215             {
 216                 err = snd_pcm_start(wwo->pcm);
 217                 TRACE("Starting 0x%8p err: %d\n", wwo->pcm, err);
 218             }
 219             state = WINE_WS_PLAYING;
 220             break;
 221
 222         case WINE_WM_STOPPING:
 223             state = WINE_WS_STOPPED;
 224             snd_pcm_drain(wwo->pcm);
 225             break;
 226
 227         case WINE_WM_CLOSING:
 228             if (wwo->pcm != NULL)
 229                 snd_pcm_drain(wwo->pcm);
 230             pdbi->mmap_thread = NULL;
 231             SetEvent(hEvent);
 232             goto out;
 233         default:
 234             ERR("Unhandled event %s\n", ALSA_getCmdString(msg));
 235             break;
 236         }
 237         if (hEvent != INVALID_HANDLE_VALUE)
 238             SetEvent(hEvent);
 239     } while (1);
 240 out:
 241     TRACE_(waveloop)("Destroyed MMAP thread\n");
 242     TRACE("Destroyed MMAP thread\n");
 243     return 0;
 244 }
 245
 246 /**
 247  * Allocate the memory-mapped buffer for direct sound, and set up the
 248  * callback.
 249  */
 250 static int DSDB_CreateMMAP(IDsDriverBufferImpl* pdbi)
 251 {
 252     WINE_WAVEDEV *     wwo = &(WOutDev[pdbi->drv->wDevID]);
 253     snd_pcm_format_t   format;
 254     snd_pcm_uframes_t  frames, ofs, avail, psize;
 255     unsigned int       channels, bits_per_sample, bits_per_frame;
 256     int                err, mmap_mode;
 257
 258     mmap_mode = snd_pcm_type(wwo->pcm);
 259
 260     ALSA_InitRingMessage(&pdbi->mmap_ring);
 261
 262     if (mmap_mode == SND_PCM_TYPE_HW) {
 263         TRACE("mmap'd buffer is a hardware buffer.\n");
 264     }
 265     else {
 266 #if 0 /* Horribly hack, shouldn't be used */
 267         err = snd_pcm_hw_params_get_period_size(wwo->hw_params, &psize, NULL);
 268         /* Set only a buffer of 2 period sizes, to decrease latency */
 269         if (err >= 0)
 270             err = snd_pcm_hw_params_set_buffer_size_near(wwo->pcm, wwo->hw_params, &psize);
 271
 272         psize *= 2;
 273         if (err < 0) {
 274             ERR("Errno %d (%s) occured when setting buffer size\n", err, strerror(errno));
 275         }
 276 #endif
 277         TRACE("mmap'd buffer is an ALSA emulation of hardware buffer.\n");
 278     }
 279
 280     err = snd_pcm_hw_params_get_period_size(wwo->hw_params, &psize, NULL);
 281     err = snd_pcm_hw_params_get_format(wwo->hw_params, &format);
 282     err = snd_pcm_hw_params_get_buffer_size(wwo->hw_params, &frames);
 283     err = snd_pcm_hw_params_get_channels(wwo->hw_params, &channels);
 284     bits_per_sample = snd_pcm_format_physical_width(format);
 285     bits_per_frame = bits_per_sample * channels;
 286
 287     if (TRACE_ON(wave))
 288         ALSA_TraceParameters(wwo->hw_params, NULL, FALSE);
 289
 290     TRACE("format=%s  frames=%ld  channels=%d  bits_per_sample=%d  bits_per_frame=%d\n",
 291           snd_pcm_format_name(format), frames, channels, bits_per_sample, bits_per_frame);
 292
 293     pdbi->mmap_buflen_frames = frames;
 294     pdbi->mmap_buflen_bytes = snd_pcm_frames_to_bytes( wwo->pcm, frames );
 295
 296     avail = snd_pcm_avail_update(wwo->pcm);
 297     if (avail < 0)
 298     {
 299         ERR("No buffer is available: %s.\n", snd_strerror(avail));
 300         return DSERR_GENERIC;
 301     }
 302     err = snd_pcm_mmap_begin(wwo->pcm, (const snd_pcm_channel_area_t **)&pdbi->mmap_areas, &ofs, &avail);
 303     if ( err < 0 )
 304     {
 305         ERR("Can't map sound device for direct access: %s\n", snd_strerror(err));
 306         return DSERR_GENERIC;
 307     }
 308     avail = 0;/* We don't have any data to commit yet */
 309     err = snd_pcm_mmap_commit(wwo->pcm, ofs, avail);
 310     if (ofs > 0)
 311         err = snd_pcm_rewind(wwo->pcm, ofs);
 312     pdbi->mmap_buffer = pdbi->mmap_areas->addr;
 313     pdbi->mmap_thread = NULL;
 314
 315     TRACE("created mmap buffer of %ld frames (%d bytes) at %p\n",
 316         frames, pdbi->mmap_buflen_bytes, pdbi->mmap_buffer);
 317
 318     return DS_OK;
 319 }
 320
 321 static HRESULT WINAPI IDsDriverBufferImpl_QueryInterface(PIDSDRIVERBUFFER iface, REFIID riid, LPVOID *ppobj)
 322 {
 323     /* IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface; */
 324     FIXME("(): stub!\n");
 325     return DSERR_UNSUPPORTED;
 326 }
 327
 328 static ULONG WINAPI IDsDriverBufferImpl_AddRef(PIDSDRIVERBUFFER iface)
 329 {
 330     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
 331     ULONG refCount = InterlockedIncrement(&This->ref);
 332
 333     TRACE("(%p)->(ref before=%u)\n",This, refCount - 1);
 334
 335     return refCount;
 336 }
 337
 338 static ULONG WINAPI IDsDriverBufferImpl_Release(PIDSDRIVERBUFFER iface)
 339 {
 340     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
 341     ULONG refCount = InterlockedDecrement(&This->ref);
 342
 343     TRACE("(%p)->(ref before=%u)\n",This, refCount + 1);
 344
 345     if (refCount)
 346         return refCount;
 347
 348     if (This->mmap_thread != NULL)
 349         ALSA_AddRingMessage(&This->mmap_ring, WINE_WM_CLOSING, 0, 1);
 350
 351     TRACE("mmap buffer %p destroyed\n", This->mmap_buffer);
 352     ALSA_DestroyRingMessage(&This->mmap_ring);
 353
 354     if (This == This->drv->primary)
 355         This->drv->primary = NULL;
 356     HeapFree(GetProcessHeap(), 0, This);
 357     return 0;
 358 }
 359
 360 static HRESULT WINAPI IDsDriverBufferImpl_Lock(PIDSDRIVERBUFFER iface,
 361                                                LPVOID*ppvAudio1,LPDWORD pdwLen1,
 362                                                LPVOID*ppvAudio2,LPDWORD pdwLen2,
 363                                                DWORD dwWritePosition,DWORD dwWriteLen,
 364                                                DWORD dwFlags)
 365 {
 366     /* IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface; */
 367     TRACE("(%p)\n",iface);
 368     return DSERR_UNSUPPORTED;
 369 }
 370
 371 static HRESULT WINAPI IDsDriverBufferImpl_Unlock(PIDSDRIVERBUFFER iface,
 372                                                  LPVOID pvAudio1,DWORD dwLen1,
 373                                                  LPVOID pvAudio2,DWORD dwLen2)
 374 {
 375     /* IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface; */
 376     TRACE("(%p)\n",iface);
 377     return DSERR_UNSUPPORTED;
 378 }
 379
 380 static HRESULT WINAPI IDsDriverBufferImpl_SetFormat(PIDSDRIVERBUFFER iface,
 381                                                     LPWAVEFORMATEX pwfx)
 382 {
 383     /* IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface; */
 384     TRACE("(%p,%p)\n",iface,pwfx);
 385     return DSERR_BUFFERLOST;
 386 }
 387
 388 static HRESULT WINAPI IDsDriverBufferImpl_SetFrequency(PIDSDRIVERBUFFER iface, DWORD dwFreq)
 389 {
 390     /* IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface; */
 391     TRACE("(%p,%d): stub\n",iface,dwFreq);
 392     return DSERR_UNSUPPORTED;
 393 }
 394
 395 static HRESULT WINAPI IDsDriverBufferImpl_SetVolumePan(PIDSDRIVERBUFFER iface, PDSVOLUMEPAN pVolPan)
 396 {
 397     DWORD vol;
 398     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
 399     TRACE("(%p,%p)\n",iface,pVolPan);
 400     vol = pVolPan->dwTotalLeftAmpFactor | (pVolPan->dwTotalRightAmpFactor << 16);
 401
 402     if (wodSetVolume(This->drv->wDevID, vol) != MMSYSERR_NOERROR) {
 403         WARN("wodSetVolume failed\n");
 404         return DSERR_INVALIDPARAM;
 405     }
 406
 407     return DS_OK;
 408 }
 409
 410 static HRESULT WINAPI IDsDriverBufferImpl_SetPosition(PIDSDRIVERBUFFER iface, DWORD dwNewPos)
 411 {
 412     /* IDsDriverImpl *This = (IDsDriverImpl *)iface; */
 413     FIXME("(%p,%d): stub\n",iface,dwNewPos);
 414     return DSERR_UNSUPPORTED;
 415 }
 416
 417 static HRESULT WINAPI IDsDriverBufferImpl_GetPosition(PIDSDRIVERBUFFER iface,
 418                                                       LPDWORD lpdwPlay, LPDWORD lpdwWrite)
 419 {
 420     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
 421     WINE_WAVEDEV *      wwo = &(WOutDev[This->drv->wDevID]);
 422     snd_pcm_uframes_t   hw_pptr, hw_wptr;
 423     snd_pcm_state_t     state;
 424
 425     if (wwo->hw_params == NULL || wwo->pcm == NULL) return DSERR_GENERIC;
 426
 427 #if 0 /* Shouldn't be needed */
 428     /* we need to track down buffer underruns */
 429     DSDB_CheckXRUN(This);
 430 #endif
 431
 432     state = snd_pcm_state(wwo->pcm);
 433     if (state == SND_PCM_STATE_RUNNING)
 434     {
 435         hw_pptr = This->mmap_ppos;
 436         hw_wptr = This->mmap_wpos;
 437     }
 438     else
 439         hw_pptr = hw_wptr = 0;
 440
 441     if (lpdwPlay)
 442         *lpdwPlay = snd_pcm_frames_to_bytes(wwo->pcm, hw_pptr) % This->mmap_buflen_bytes;
 443     if (lpdwWrite)
 444         *lpdwWrite = snd_pcm_frames_to_bytes(wwo->pcm, hw_wptr) % This->mmap_buflen_bytes;
 445
 446     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);
 447     return DS_OK;
 448 }
 449
 450 static HRESULT WINAPI IDsDriverBufferImpl_Play(PIDSDRIVERBUFFER iface, DWORD dwRes1, DWORD dwRes2, DWORD dwFlags)
 451 {
 452     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
 453
 454     TRACE("(%p,%x,%x,%x)\n",iface,dwRes1,dwRes2,dwFlags);
 455
 456     if (This->mmap_thread == NULL)
 457         This->mmap_thread = CreateThread(NULL, 0, DBSB_MMAPLoop, (LPVOID)(DWORD)This, 0, NULL);
 458
 459     if (This->mmap_thread == NULL)
 460         ERR("Cannot create sound thread, don't expect any sound at all\n");
 461     else
 462         ALSA_AddRingMessage(&This->mmap_ring, WINE_WM_STARTING, 0, 1);
 463
 464     return DS_OK;
 465 }
 466
 467 static HRESULT WINAPI IDsDriverBufferImpl_Stop(PIDSDRIVERBUFFER iface)
 468 {
 469     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
 470
 471     TRACE("(%p)\n",iface);
 472
 473     if (This->mmap_thread != NULL)
 474         ALSA_AddRingMessage(&This->mmap_ring, WINE_WM_STOPPING, 0, 1);
 475
 476     return DS_OK;
 477 }
 478
 479 static const IDsDriverBufferVtbl dsdbvt =
 480 {
 481     IDsDriverBufferImpl_QueryInterface,
 482     IDsDriverBufferImpl_AddRef,
 483     IDsDriverBufferImpl_Release,
 484     IDsDriverBufferImpl_Lock,
 485     IDsDriverBufferImpl_Unlock,
 486     IDsDriverBufferImpl_SetFormat,
 487     IDsDriverBufferImpl_SetFrequency,
 488     IDsDriverBufferImpl_SetVolumePan,
 489     IDsDriverBufferImpl_SetPosition,
 490     IDsDriverBufferImpl_GetPosition,
 491     IDsDriverBufferImpl_Play,
 492     IDsDriverBufferImpl_Stop
 493 };
 494
 495 static HRESULT WINAPI IDsDriverImpl_QueryInterface(PIDSDRIVER iface, REFIID riid, LPVOID *ppobj)
 496 {
 497     /* IDsDriverImpl *This = (IDsDriverImpl *)iface; */
 498     FIXME("(%p): stub!\n",iface);
 499     return DSERR_UNSUPPORTED;
 500 }
 501
 502 static ULONG WINAPI IDsDriverImpl_AddRef(PIDSDRIVER iface)
 503 {
 504     IDsDriverImpl *This = (IDsDriverImpl *)iface;
 505     ULONG refCount = InterlockedIncrement(&This->ref);
 506
 507     TRACE("(%p)->(ref before=%u)\n",This, refCount - 1);
 508
 509     return refCount;
 510 }
 511
 512 static ULONG WINAPI IDsDriverImpl_Release(PIDSDRIVER iface)
 513 {
 514     IDsDriverImpl *This = (IDsDriverImpl *)iface;
 515     ULONG refCount = InterlockedDecrement(&This->ref);
 516
 517     TRACE("(%p)->(ref before=%u)\n",This, refCount + 1);
 518
 519     if (refCount)
 520         return refCount;
 521     HeapFree(GetProcessHeap(),0,This);
 522     return 0;
 523 }
 524
 525 static HRESULT WINAPI IDsDriverImpl_GetDriverDesc(PIDSDRIVER iface, PDSDRIVERDESC pDesc)
 526 {
 527     IDsDriverImpl *This = (IDsDriverImpl *)iface;
 528     TRACE("(%p,%p)\n",iface,pDesc);
 529     memcpy(pDesc, &(WOutDev[This->wDevID].ds_desc), sizeof(DSDRIVERDESC));
 530     pDesc->dwFlags = DSDDESC_DOMMSYSTEMOPEN | DSDDESC_DOMMSYSTEMSETFORMAT |
 531         DSDDESC_USESYSTEMMEMORY | DSDDESC_DONTNEEDPRIMARYLOCK;
 532     pDesc->dnDevNode            = WOutDev[This->wDevID].waveDesc.dnDevNode;
 533     pDesc->wVxdId               = 0;
 534     pDesc->wReserved            = 0;
 535     pDesc->ulDeviceNum          = This->wDevID;
 536     pDesc->dwHeapType           = DSDHEAP_NOHEAP;
 537     pDesc->pvDirectDrawHeap     = NULL;
 538     pDesc->dwMemStartAddress    = 0;
 539     pDesc->dwMemEndAddress      = 0;
 540     pDesc->dwMemAllocExtra      = 0;
 541     pDesc->pvReserved1          = NULL;
 542     pDesc->pvReserved2          = NULL;
 543     return DS_OK;
 544 }
 545
 546 static HRESULT WINAPI IDsDriverImpl_Open(PIDSDRIVER iface)
 547 {
 548     /* IDsDriverImpl *This = (IDsDriverImpl *)iface; */
 549     TRACE("(%p)\n",iface);
 550     return DS_OK;
 551 }
 552
 553 static HRESULT WINAPI IDsDriverImpl_Close(PIDSDRIVER iface)
 554 {
 555     /* IDsDriverImpl *This = (IDsDriverImpl *)iface; */
 556     TRACE("(%p)\n",iface);
 557     return DS_OK;
 558 }
 559
 560 static HRESULT WINAPI IDsDriverImpl_GetCaps(PIDSDRIVER iface, PDSDRIVERCAPS pCaps)
 561 {
 562     IDsDriverImpl *This = (IDsDriverImpl *)iface;
 563     TRACE("(%p,%p)\n",iface,pCaps);
 564     memcpy(pCaps, &(WOutDev[This->wDevID].ds_caps), sizeof(DSDRIVERCAPS));
 565     return DS_OK;
 566 }
 567
 568 static HRESULT WINAPI IDsDriverImpl_CreateSoundBuffer(PIDSDRIVER iface,
 569                                                       LPWAVEFORMATEX pwfx,
 570                                                       DWORD dwFlags, DWORD dwCardAddress,
 571                                                       LPDWORD pdwcbBufferSize,
 572                                                       LPBYTE *ppbBuffer,
 573                                                       LPVOID *ppvObj)
 574 {
 575     IDsDriverImpl *This = (IDsDriverImpl *)iface;
 576     IDsDriverBufferImpl** ippdsdb = (IDsDriverBufferImpl**)ppvObj;
 577     int err;
 578
 579     TRACE("(%p,%p,%x,%x)\n",iface,pwfx,dwFlags,dwCardAddress);
 580     /* we only support primary buffers */
 581     if (!(dwFlags & DSBCAPS_PRIMARYBUFFER))
 582         return DSERR_UNSUPPORTED;
 583     if (This->primary)
 584         return DSERR_ALLOCATED;
 585     if (dwFlags & (DSBCAPS_CTRLFREQUENCY | DSBCAPS_CTRLPAN))
 586         return DSERR_CONTROLUNAVAIL;
 587
 588     *ippdsdb = HeapAlloc(GetProcessHeap(),0,sizeof(IDsDriverBufferImpl));
 589     if (*ippdsdb == NULL)
 590         return DSERR_OUTOFMEMORY;
 591     (*ippdsdb)->lpVtbl  = &dsdbvt;
 592     (*ippdsdb)->ref     = 1;
 593     (*ippdsdb)->drv     = This;
 594
 595     err = DSDB_CreateMMAP((*ippdsdb));
 596     if ( err != DS_OK )
 597      {
 598         HeapFree(GetProcessHeap(), 0, *ippdsdb);
 599         *ippdsdb = NULL;
 600         return err;
 601      }
 602     *ppbBuffer = (*ippdsdb)->mmap_buffer;
 603     *pdwcbBufferSize = (*ippdsdb)->mmap_buflen_bytes;
 604
 605     This->primary = *ippdsdb;
 606
 607     /* buffer is ready to go */
 608     TRACE("buffer created at %p\n", *ippdsdb);
 609     return DS_OK;
 610 }
 611
 612 static HRESULT WINAPI IDsDriverImpl_DuplicateSoundBuffer(PIDSDRIVER iface,
 613                                                          PIDSDRIVERBUFFER pBuffer,
 614                                                          LPVOID *ppvObj)
 615 {
 616     /* IDsDriverImpl *This = (IDsDriverImpl *)iface; */
 617     TRACE("(%p,%p): stub\n",iface,pBuffer);
 618     return DSERR_INVALIDCALL;
 619 }
 620
 621 static const IDsDriverVtbl dsdvt =
 622 {
 623     IDsDriverImpl_QueryInterface,
 624     IDsDriverImpl_AddRef,
 625     IDsDriverImpl_Release,
 626     IDsDriverImpl_GetDriverDesc,
 627     IDsDriverImpl_Open,
 628     IDsDriverImpl_Close,
 629     IDsDriverImpl_GetCaps,
 630     IDsDriverImpl_CreateSoundBuffer,
 631     IDsDriverImpl_DuplicateSoundBuffer
 632 };
 633
 634 DWORD wodDsCreate(UINT wDevID, PIDSDRIVER* drv)
 635 {
 636     IDsDriverImpl** idrv = (IDsDriverImpl**)drv;
 637
 638     TRACE("driver created\n");
 639
 640     /* the HAL isn't much better than the HEL if we can't do mmap() */
 641     if (!(WOutDev[wDevID].outcaps.dwSupport & WAVECAPS_DIRECTSOUND)) {
 642         ERR("DirectSound flag not set\n");
 643         MESSAGE("This sound card's driver does not support direct access\n");
 644         MESSAGE("The (slower) DirectSound HEL mode will be used instead.\n");
 645         return MMSYSERR_NOTSUPPORTED;
 646     }
 647
 648     *idrv = HeapAlloc(GetProcessHeap(),0,sizeof(IDsDriverImpl));
 649     if (!*idrv)
 650         return MMSYSERR_NOMEM;
 651     (*idrv)->lpVtbl     = &dsdvt;
 652     (*idrv)->ref        = 1;
 653
 654     (*idrv)->wDevID     = wDevID;
 655     (*idrv)->primary    = NULL;
 656     return MMSYSERR_NOERROR;
 657 }
 658
 659 DWORD wodDsDesc(UINT wDevID, PDSDRIVERDESC desc)
 660 {
 661     memcpy(desc, &(WOutDev[wDevID].ds_desc), sizeof(DSDRIVERDESC));
 662     return MMSYSERR_NOERROR;
 663 }
 664
 665 #endif /* HAVE_ALSA */