dlls/winealsa.drv/dsoutput.c

   1 /*
   2  * Sample Wine Driver for Advanced Linux Sound System (ALSA)
   3  *      Based on version <final> of the ALSA API
   4  *
   5  * Copyright    2002 Eric Pouech
   6  *              2002 Marco Pietrobono
   7  *              2003 Christian Costa : WaveIn support
   8  *              2006-2007 Maarten Lankhorst
   9  *
  10  * This library is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU Lesser General Public
  12  * License as published by the Free Software Foundation; either
  13  * version 2.1 of the License, or (at your option) any later version.
  14  *
  15  * This library is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * Lesser General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU Lesser General Public
  21  * License along with this library; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  23  */
  24
  25 /*======================================================================*
  26  *              Low level dsound output implementation                  *
  27  *======================================================================*/
  28
  29 #include "config.h"
  30 #include "wine/port.h"
  31
  32 #include <stdlib.h>
  33 #include <assert.h>
  34 #include <stdarg.h>
  35 #include <stdio.h>
  36 #include <string.h>
  37 #ifdef HAVE_UNISTD_H
  38 # include <unistd.h>
  39 #endif
  40 #include <errno.h>
  41 #include <limits.h>
  42 #include <fcntl.h>
  43 #ifdef HAVE_SYS_IOCTL_H
  44 # include <sys/ioctl.h>
  45 #endif
  46 #ifdef HAVE_SYS_MMAN_H
  47 # include <sys/mman.h>
  48 #endif
  49 #include "windef.h"
  50 #include "winbase.h"
  51 #include "wingdi.h"
  52 #include "winerror.h"
  53 #include "winuser.h"
  54 #include "mmddk.h"
  55
  56 #include "alsa.h"
  57 #include "wine/library.h"
  58 #include "wine/unicode.h"
  59 #include "wine/debug.h"
  60
  61 #ifdef HAVE_ALSA
  62
  63 WINE_DEFAULT_DEBUG_CHANNEL(dsalsa);
  64
  65 typedef struct IDsDriverImpl IDsDriverImpl;
  66 typedef struct IDsDriverBufferImpl IDsDriverBufferImpl;
  67
  68 struct IDsDriverImpl
  69 {
  70     /* IUnknown fields */
  71     const IDsDriverVtbl *lpVtbl;
  72     LONG ref;
  73
  74     /* IDsDriverImpl fields */
  75     IDsDriverBufferImpl* primary;
  76     UINT wDevID;
  77 };
  78
  79 struct IDsDriverBufferImpl
  80 {
  81     const IDsDriverBufferVtbl *lpVtbl;
  82     LONG ref;
  83     IDsDriverImpl* drv;
  84
  85     CRITICAL_SECTION pcm_crst;
  86     BYTE *mmap_buffer;
  87     DWORD mmap_buflen_bytes;
  88     BOOL mmap;
  89
  90     snd_pcm_t *pcm;
  91     snd_pcm_hw_params_t *hw_params;
  92     snd_pcm_sw_params_t *sw_params;
  93     snd_pcm_uframes_t mmap_buflen_frames, mmap_pos, mmap_commitahead;
  94 };
  95
  96 /** Fill buffers, for starting and stopping
  97  * Alsa won't start playing until everything is filled up
  98  * This also updates mmap_pos
  99  *
 100  * Returns: Amount of periods in use so snd_pcm_avail_update
 101  * doesn't have to be called up to 4x in GetPosition()
 102  */
 103 static snd_pcm_uframes_t CommitAll(IDsDriverBufferImpl *This)
 104 {
 105     const snd_pcm_channel_area_t *areas;
 106     snd_pcm_sframes_t used;
 107     const snd_pcm_uframes_t commitahead = This->mmap_commitahead;
 108
 109     used = This->mmap_buflen_frames - snd_pcm_avail_update(This->pcm);
 110     if (used < 0) used = 0;
 111     TRACE("%p needs to commit to %lu, used: %ld\n", This, commitahead, used);
 112     if (used < commitahead)
 113     {
 114         snd_pcm_uframes_t done, putin = commitahead - used;
 115         if (This->mmap)
 116         {
 117             snd_pcm_mmap_begin(This->pcm, &areas, &This->mmap_pos, &putin);
 118             done = snd_pcm_mmap_commit(This->pcm, This->mmap_pos, putin);
 119         }
 120         else
 121         {
 122             if (putin + This->mmap_pos > This->mmap_buflen_frames)
 123                 putin = This->mmap_buflen_frames - This->mmap_pos;
 124             done = putin;
 125             snd_pcm_writei(This->pcm, This->mmap_buffer + snd_pcm_frames_to_bytes(This->pcm, This->mmap_pos), putin);
 126         }
 127         This->mmap_pos += done;
 128         used += done;
 129         putin = commitahead - used;
 130
 131         if (This->mmap_pos == This->mmap_buflen_frames && (snd_pcm_sframes_t)putin > 0)
 132         {
 133             if (This->mmap)
 134             {
 135                 snd_pcm_mmap_begin(This->pcm, &areas, &This->mmap_pos, &putin);
 136                 done = snd_pcm_mmap_commit(This->pcm, This->mmap_pos, putin);
 137                 This->mmap_pos += done;
 138             }
 139             else
 140             {
 141                 snd_pcm_writei(This->pcm, This->mmap_buffer, putin);
 142                 This->mmap_pos = done = putin;
 143             }
 144             used += done;
 145         }
 146     }
 147
 148     if (This->mmap_pos == This->mmap_buflen_frames)
 149         This->mmap_pos = 0;
 150
 151     return used;
 152 }
 153
 154 static void CheckXRUN(IDsDriverBufferImpl* This)
 155 {
 156     snd_pcm_state_t state = snd_pcm_state(This->pcm);
 157     snd_pcm_sframes_t delay;
 158     int err;
 159
 160     snd_pcm_hwsync(This->pcm);
 161     snd_pcm_delay(This->pcm, &delay);
 162     if ( state == SND_PCM_STATE_XRUN )
 163     {
 164         err = snd_pcm_prepare(This->pcm);
 165         CommitAll(This);
 166         snd_pcm_start(This->pcm);
 167         WARN("xrun occurred\n");
 168         if ( err < 0 )
 169             ERR("recovery from xrun failed, prepare failed: %s\n", snd_strerror(err));
 170     }
 171     else if ( state == SND_PCM_STATE_SUSPENDED )
 172     {
 173         int err = snd_pcm_resume(This->pcm);
 174         TRACE("recovery from suspension occurred\n");
 175         if (err < 0 && err != -EAGAIN){
 176             err = snd_pcm_prepare(This->pcm);
 177             if (err < 0)
 178                 ERR("recovery from suspend failed, prepare failed: %s\n", snd_strerror(err));
 179         }
 180     } else if ( state != SND_PCM_STATE_RUNNING ) {
 181         FIXME("Unhandled state: %d\n", state);
 182     }
 183 }
 184
 185 /**
 186  * Allocate the memory-mapped buffer for direct sound, and set up the
 187  * callback.
 188  */
 189 static int DSDB_CreateMMAP(IDsDriverBufferImpl* pdbi)
 190 {
 191     snd_pcm_t *pcm = pdbi->pcm;
 192     snd_pcm_format_t format;
 193     snd_pcm_uframes_t frames, ofs, avail, psize, boundary;
 194     unsigned int channels, bits_per_sample, bits_per_frame;
 195     int err, mmap_mode;
 196     const snd_pcm_channel_area_t *areas;
 197     snd_pcm_hw_params_t *hw_params = pdbi->hw_params;
 198     snd_pcm_sw_params_t *sw_params = pdbi->sw_params;
 199     void *buf;
 200
 201     mmap_mode = snd_pcm_type(pcm);
 202
 203     if (mmap_mode == SND_PCM_TYPE_HW)
 204         TRACE("mmap'd buffer is a direct hardware buffer.\n");
 205     else if (mmap_mode == SND_PCM_TYPE_DMIX)
 206         TRACE("mmap'd buffer is an ALSA dmix buffer\n");
 207     else
 208         TRACE("mmap'd buffer is an ALSA type %d buffer\n", mmap_mode);
 209
 210     err = snd_pcm_hw_params_get_period_size(hw_params, &psize, NULL);
 211
 212     err = snd_pcm_hw_params_get_format(hw_params, &format);
 213     err = snd_pcm_hw_params_get_buffer_size(hw_params, &frames);
 214     err = snd_pcm_hw_params_get_channels(hw_params, &channels);
 215     bits_per_sample = snd_pcm_format_physical_width(format);
 216     bits_per_frame = bits_per_sample * channels;
 217
 218     if (TRACE_ON(dsalsa))
 219         ALSA_TraceParameters(hw_params, NULL, FALSE);
 220
 221     TRACE("format=%s  frames=%ld  channels=%d  bits_per_sample=%d  bits_per_frame=%d\n",
 222           snd_pcm_format_name(format), frames, channels, bits_per_sample, bits_per_frame);
 223
 224     pdbi->mmap_buflen_frames = frames;
 225     pdbi->mmap_buflen_bytes = snd_pcm_frames_to_bytes( pcm, frames );
 226
 227     snd_pcm_sw_params_current(pcm, sw_params);
 228     snd_pcm_sw_params_set_start_threshold(pcm, sw_params, 0);
 229     snd_pcm_sw_params_get_boundary(sw_params, &boundary);
 230     snd_pcm_sw_params_set_stop_threshold(pcm, sw_params, boundary);
 231     snd_pcm_sw_params_set_silence_threshold(pcm, sw_params, boundary);
 232     snd_pcm_sw_params_set_silence_size(pcm, sw_params, 0);
 233     snd_pcm_sw_params_set_avail_min(pcm, sw_params, 0);
 234     err = snd_pcm_sw_params(pcm, sw_params);
 235
 236     avail = snd_pcm_avail_update(pcm);
 237     if ((snd_pcm_sframes_t)avail < 0)
 238     {
 239         ERR("No buffer is available: %s.\n", snd_strerror(avail));
 240         return DSERR_GENERIC;
 241     }
 242
 243     if (!pdbi->mmap)
 244     {
 245         buf = pdbi->mmap_buffer = HeapAlloc(GetProcessHeap(), 0, pdbi->mmap_buflen_bytes);
 246         if (!buf)
 247             return DSERR_OUTOFMEMORY;
 248
 249         snd_pcm_format_set_silence(format, buf, pdbi->mmap_buflen_frames);
 250         pdbi->mmap_pos = 0;
 251     }
 252     else
 253     {
 254         err = snd_pcm_mmap_begin(pcm, &areas, &ofs, &avail);
 255         if ( err < 0 )
 256         {
 257             ERR("Can't map sound device for direct access: %s/%d\n", snd_strerror(err), err);
 258             return DSERR_GENERIC;
 259         }
 260         snd_pcm_format_set_silence(format, areas->addr, pdbi->mmap_buflen_frames);
 261         pdbi->mmap_pos = ofs + snd_pcm_mmap_commit(pcm, ofs, 0);
 262         pdbi->mmap_buffer = areas->addr;
 263     }
 264
 265     TRACE("created mmap buffer of %ld frames (%d bytes) at %p\n",
 266         frames, pdbi->mmap_buflen_bytes, pdbi->mmap_buffer);
 267
 268     return DS_OK;
 269 }
 270
 271 static HRESULT WINAPI IDsDriverBufferImpl_QueryInterface(PIDSDRIVERBUFFER iface, REFIID riid, LPVOID *ppobj)
 272 {
 273     /* IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface; */
 274     FIXME("(): stub!\n");
 275     return DSERR_UNSUPPORTED;
 276 }
 277
 278 static ULONG WINAPI IDsDriverBufferImpl_AddRef(PIDSDRIVERBUFFER iface)
 279 {
 280     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
 281     ULONG refCount = InterlockedIncrement(&This->ref);
 282
 283     TRACE("(%p)->(ref before=%u)\n",This, refCount - 1);
 284
 285     return refCount;
 286 }
 287
 288 static ULONG WINAPI IDsDriverBufferImpl_Release(PIDSDRIVERBUFFER iface)
 289 {
 290     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
 291     ULONG refCount = InterlockedDecrement(&This->ref);
 292
 293     TRACE("(%p)->(ref before=%u)\n",This, refCount + 1);
 294
 295     if (refCount)
 296         return refCount;
 297
 298     TRACE("mmap buffer %p destroyed\n", This->mmap_buffer);
 299
 300     if (This == This->drv->primary)
 301         This->drv->primary = NULL;
 302
 303     This->pcm_crst.DebugInfo->Spare[0] = 0;
 304     DeleteCriticalSection(&This->pcm_crst);
 305
 306     snd_pcm_drop(This->pcm);
 307     snd_pcm_close(This->pcm);
 308     This->pcm = NULL;
 309     HeapFree(GetProcessHeap(), 0, This->sw_params);
 310     HeapFree(GetProcessHeap(), 0, This->hw_params);
 311     if (!This->mmap)
 312         HeapFree(GetProcessHeap(), 0, This->mmap_buffer);
 313     HeapFree(GetProcessHeap(), 0, This);
 314     return 0;
 315 }
 316
 317 static HRESULT WINAPI IDsDriverBufferImpl_Lock(PIDSDRIVERBUFFER iface,
 318                                                LPVOID*ppvAudio1,LPDWORD pdwLen1,
 319                                                LPVOID*ppvAudio2,LPDWORD pdwLen2,
 320                                                DWORD dwWritePosition,DWORD dwWriteLen,
 321                                                DWORD dwFlags)
 322 {
 323     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
 324     snd_pcm_uframes_t writepos;
 325
 326     TRACE("%d bytes from %d\n", dwWriteLen, dwWritePosition);
 327
 328     /* **** */
 329     EnterCriticalSection(&This->pcm_crst);
 330
 331     if (dwFlags & DSBLOCK_ENTIREBUFFER)
 332         dwWriteLen = This->mmap_buflen_bytes;
 333
 334     if (dwWriteLen > This->mmap_buflen_bytes || dwWritePosition >= This->mmap_buflen_bytes)
 335     {
 336         /* **** */
 337         LeaveCriticalSection(&This->pcm_crst);
 338         return DSERR_INVALIDPARAM;
 339     }
 340
 341     if (ppvAudio2) *ppvAudio2 = NULL;
 342     if (pdwLen2) *pdwLen2 = 0;
 343
 344     *ppvAudio1 = This->mmap_buffer + dwWritePosition;
 345     *pdwLen1 = dwWriteLen;
 346
 347     if (dwWritePosition+dwWriteLen > This->mmap_buflen_bytes)
 348     {
 349         DWORD remainder = This->mmap_buflen_bytes - dwWritePosition;
 350         *pdwLen1 = remainder;
 351
 352         if (ppvAudio2 && pdwLen2)
 353         {
 354             *ppvAudio2 = This->mmap_buffer;
 355             *pdwLen2 = dwWriteLen - remainder;
 356         }
 357         else dwWriteLen = remainder;
 358     }
 359
 360     writepos = snd_pcm_bytes_to_frames(This->pcm, dwWritePosition);
 361     if (writepos == This->mmap_pos)
 362     {
 363         const snd_pcm_channel_area_t *areas;
 364         snd_pcm_uframes_t writelen = snd_pcm_bytes_to_frames(This->pcm, dwWriteLen), putin = writelen;
 365         TRACE("Hit mmap_pos, locking data!\n");
 366         if (This->mmap)
 367             snd_pcm_mmap_begin(This->pcm, &areas, &This->mmap_pos, &putin);
 368     }
 369     else
 370         WARN("mmap_pos (%lu) != writepos (%lu) not locking data!\n", This->mmap_pos, writepos);
 371
 372     LeaveCriticalSection(&This->pcm_crst);
 373     /* **** */
 374     return DS_OK;
 375 }
 376
 377 static HRESULT WINAPI IDsDriverBufferImpl_Unlock(PIDSDRIVERBUFFER iface,
 378                                                  LPVOID pvAudio1,DWORD dwLen1,
 379                                                  LPVOID pvAudio2,DWORD dwLen2)
 380 {
 381     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
 382     snd_pcm_uframes_t writepos;
 383
 384     if (!dwLen1)
 385         return DS_OK;
 386
 387     /* **** */
 388     EnterCriticalSection(&This->pcm_crst);
 389
 390     writepos = snd_pcm_bytes_to_frames(This->pcm, (DWORD_PTR)pvAudio1 - (DWORD_PTR)This->mmap_buffer);
 391     if (writepos == This->mmap_pos)
 392     {
 393         const snd_pcm_channel_area_t *areas;
 394         snd_pcm_uframes_t writelen = snd_pcm_bytes_to_frames(This->pcm, dwLen1);
 395         TRACE("Committing data\n");
 396         if (This->mmap)
 397             This->mmap_pos += snd_pcm_mmap_commit(This->pcm, This->mmap_pos, writelen);
 398         else
 399         {
 400             int ret;
 401             ret = snd_pcm_writei(This->pcm, pvAudio1, writelen);
 402             if (ret == -EPIPE)
 403             {
 404                 WARN("Underrun occurred\n");
 405                 snd_pcm_prepare(This->pcm);
 406                 ret = snd_pcm_writei(This->pcm, pvAudio1, writelen);
 407                 snd_pcm_start(This->pcm);
 408             }
 409             if (ret < 0)
 410                 WARN("Committing data: %d / %s (%p %ld)\n", ret, snd_strerror(ret), pvAudio1, writelen);
 411             This->mmap_pos += writelen;
 412         }
 413
 414         if (This->mmap_pos == This->mmap_buflen_frames)
 415             This->mmap_pos = 0;
 416         if (!This->mmap_pos && dwLen2)
 417         {
 418             writelen = snd_pcm_bytes_to_frames(This->pcm, dwLen2);
 419             if (This->mmap)
 420             {
 421                 snd_pcm_mmap_begin(This->pcm, &areas, &This->mmap_pos, &writelen);
 422                 This->mmap_pos += snd_pcm_mmap_commit(This->pcm, This->mmap_pos, writelen);
 423             }
 424             else
 425             {
 426                 int ret;
 427                 ret = snd_pcm_writei(This->pcm, pvAudio2, writelen);
 428                 This->mmap_pos = writelen;
 429             }
 430             assert(This->mmap_pos < This->mmap_buflen_frames);
 431         }
 432     }
 433     LeaveCriticalSection(&This->pcm_crst);
 434     /* **** */
 435
 436     return DS_OK;
 437 }
 438
 439 static HRESULT SetFormat(IDsDriverBufferImpl *This, LPWAVEFORMATEX pwfx)
 440 {
 441     snd_pcm_t *pcm = NULL;
 442     snd_pcm_hw_params_t *hw_params = This->hw_params;
 443     unsigned int buffer_time = 500000;
 444     snd_pcm_format_t format = -1;
 445     snd_pcm_uframes_t psize;
 446     DWORD rate = pwfx->nSamplesPerSec;
 447     int err=0;
 448
 449     switch (pwfx->wBitsPerSample)
 450     {
 451         case  8: format = SND_PCM_FORMAT_U8; break;
 452         case 16: format = SND_PCM_FORMAT_S16_LE; break;
 453         case 24: format = SND_PCM_FORMAT_S24_3LE; break;
 454         case 32: format = SND_PCM_FORMAT_S32_LE; break;
 455         default: FIXME("Unsupported bpp: %d\n", pwfx->wBitsPerSample); return DSERR_GENERIC;
 456     }
 457
 458     err = snd_pcm_open(&pcm, WOutDev[This->drv->wDevID].pcmname, SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
 459     if (err < 0)
 460     {
 461         if (errno != EBUSY || !This->pcm)
 462         {
 463             WARN("Cannot open sound device: %s\n", snd_strerror(err));
 464             return DSERR_GENERIC;
 465         }
 466         snd_pcm_drop(This->pcm);
 467         snd_pcm_close(This->pcm);
 468         This->pcm = NULL;
 469         err = snd_pcm_open(&pcm, WOutDev[This->drv->wDevID].pcmname, SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
 470         if (err < 0)
 471         {
 472             WARN("Cannot open sound device: %s\n", snd_strerror(err));
 473             return DSERR_BUFFERLOST;
 474         }
 475     }
 476
 477     /* Set some defaults */
 478     snd_pcm_hw_params_any(pcm, hw_params);
 479     err = snd_pcm_hw_params_set_channels(pcm, hw_params, pwfx->nChannels);
 480     if (err < 0) { WARN("Could not set channels to %d\n", pwfx->nChannels); goto err; }
 481
 482     err = snd_pcm_hw_params_set_format(pcm, hw_params, format);
 483     if (err < 0) { WARN("Could not set format to %d bpp\n", pwfx->wBitsPerSample); goto err; }
 484
 485     /* Alsa's rate resampling is only used if the application specifically requests
 486      * a buffer at a certain frequency, else it is better to disable it due to unwanted
 487      * side effects, which may include: Less granular pointer, changing buffer sizes, etc
 488      */
 489 #if SND_LIB_VERSION >= 0x010009
 490     snd_pcm_hw_params_set_rate_resample(pcm, hw_params, 0);
 491 #endif
 492
 493     err = snd_pcm_hw_params_set_rate_near(pcm, hw_params, &rate, NULL);
 494     if (err < 0) { rate = pwfx->nSamplesPerSec; WARN("Could not set rate\n"); goto err; }
 495
 496     if (!ALSA_NearMatch(rate, pwfx->nSamplesPerSec))
 497     {
 498         WARN("Could not set sound rate to %d, but instead to %d\n", pwfx->nSamplesPerSec, rate);
 499         pwfx->nSamplesPerSec = rate;
 500         pwfx->nAvgBytesPerSec = rate * pwfx->nBlockAlign;
 501         /* Let DirectSound detect this */
 502     }
 503
 504     snd_pcm_hw_params_set_periods_integer(pcm, hw_params);
 505     snd_pcm_hw_params_set_buffer_time_near(pcm, hw_params, &buffer_time, NULL);
 506     buffer_time = 10000;
 507     snd_pcm_hw_params_set_period_time_near(pcm, hw_params, &buffer_time, NULL);
 508
 509     err = snd_pcm_hw_params_get_period_size(hw_params, &psize, NULL);
 510     buffer_time = 16;
 511     snd_pcm_hw_params_set_periods_near(pcm, hw_params, &buffer_time, NULL);
 512
 513     if (!This->mmap)
 514     {
 515         HeapFree(GetProcessHeap(), 0, This->mmap_buffer);
 516         This->mmap_buffer = NULL;
 517     }
 518
 519     err = snd_pcm_hw_params_set_access (pcm, hw_params, SND_PCM_ACCESS_MMAP_INTERLEAVED);
 520     if (err >= 0)
 521         This->mmap = 1;
 522     else
 523     {
 524         This->mmap = 0;
 525         err = snd_pcm_hw_params_set_access (pcm, hw_params, SND_PCM_ACCESS_RW_INTERLEAVED);
 526     }
 527
 528     err = snd_pcm_hw_params(pcm, hw_params);
 529     err = snd_pcm_sw_params(pcm, This->sw_params);
 530     snd_pcm_prepare(pcm);
 531
 532     /* ALSA needs at least 3 buffers to work successfully */
 533     This->mmap_commitahead = 3 * psize;
 534     while (This->mmap_commitahead <= 512)
 535         This->mmap_commitahead += psize;
 536
 537     if (This->pcm)
 538     {
 539         snd_pcm_drop(This->pcm);
 540         snd_pcm_close(This->pcm);
 541     }
 542     This->pcm = pcm;
 543     snd_pcm_prepare(This->pcm);
 544     DSDB_CreateMMAP(This);
 545     return S_OK;
 546
 547     err:
 548     if (err < 0)
 549         WARN("Failed to apply changes: %s\n", snd_strerror(err));
 550
 551     if (!This->pcm)
 552         This->pcm = pcm;
 553     else
 554         snd_pcm_close(pcm);
 555
 556     if (This->pcm)
 557         snd_pcm_hw_params_current(This->pcm, This->hw_params);
 558
 559     return DSERR_BADFORMAT;
 560 }
 561
 562 static HRESULT WINAPI IDsDriverBufferImpl_SetFormat(PIDSDRIVERBUFFER iface, LPWAVEFORMATEX pwfx)
 563 {
 564     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
 565     HRESULT hr = S_OK;
 566
 567     TRACE("(%p, %p)\n", iface, pwfx);
 568
 569     /* **** */
 570     EnterCriticalSection(&This->pcm_crst);
 571     hr = SetFormat(This, pwfx);
 572     /* **** */
 573     LeaveCriticalSection(&This->pcm_crst);
 574
 575     if (hr == DS_OK)
 576         return S_FALSE;
 577     return hr;
 578 }
 579
 580 static HRESULT WINAPI IDsDriverBufferImpl_SetFrequency(PIDSDRIVERBUFFER iface, DWORD dwFreq)
 581 {
 582     /* IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface; */
 583     FIXME("(%p,%d): stub\n",iface,dwFreq);
 584     return S_OK;
 585 }
 586
 587 static HRESULT WINAPI IDsDriverBufferImpl_SetVolumePan(PIDSDRIVERBUFFER iface, PDSVOLUMEPAN pVolPan)
 588 {
 589     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
 590     FIXME("(%p,%p): stub\n",This,pVolPan);
 591     /* TODO: Bring volume control back */
 592     return DS_OK;
 593 }
 594
 595 static HRESULT WINAPI IDsDriverBufferImpl_SetPosition(PIDSDRIVERBUFFER iface, DWORD dwNewPos)
 596 {
 597     /* IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface; */
 598     /* I don't even think alsa allows this */
 599     FIXME("(%p,%d): stub\n",iface,dwNewPos);
 600     return DSERR_UNSUPPORTED;
 601 }
 602
 603 static HRESULT WINAPI IDsDriverBufferImpl_GetPosition(PIDSDRIVERBUFFER iface,
 604                                                       LPDWORD lpdwPlay, LPDWORD lpdwWrite)
 605 {
 606     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
 607     snd_pcm_uframes_t hw_pptr, hw_wptr;
 608     snd_pcm_state_t state;
 609
 610     /* **** */
 611     EnterCriticalSection(&This->pcm_crst);
 612
 613     if (!This->pcm)
 614     {
 615         FIXME("Bad pointer for pcm: %p\n", This->pcm);
 616         LeaveCriticalSection(&This->pcm_crst);
 617         return DSERR_GENERIC;
 618     }
 619
 620     if (!lpdwPlay && !lpdwWrite)
 621         CommitAll(This);
 622
 623     state = snd_pcm_state(This->pcm);
 624
 625     if (state != SND_PCM_STATE_PREPARED && state != SND_PCM_STATE_RUNNING)
 626     {
 627         CheckXRUN(This);
 628         state = snd_pcm_state(This->pcm);
 629     }
 630     if (state == SND_PCM_STATE_RUNNING)
 631     {
 632         snd_pcm_sframes_t used = This->mmap_buflen_frames - snd_pcm_avail_update(This->pcm);
 633
 634         if (used < 0)
 635         {
 636             WARN("Underrun: %ld / %ld\n", used, snd_pcm_avail_update(This->pcm));
 637             if (This->mmap)
 638             {
 639                 snd_pcm_forward(This->pcm, -used);
 640                 This->mmap_pos += -used;
 641                 This->mmap_pos %= This->mmap_buflen_frames;
 642             }
 643             used = 0;
 644         }
 645
 646         if (This->mmap_pos > used)
 647             hw_pptr = This->mmap_pos - used;
 648         else
 649             hw_pptr = This->mmap_buflen_frames + This->mmap_pos - used;
 650         hw_pptr %= This->mmap_buflen_frames;
 651
 652         TRACE("At position: %ld (%ld) - Used %ld\n", hw_pptr, This->mmap_pos, used);
 653     }
 654     else hw_pptr = This->mmap_pos;
 655     hw_wptr = This->mmap_pos;
 656
 657     LeaveCriticalSection(&This->pcm_crst);
 658     /* **** */
 659
 660     if (lpdwPlay)
 661         *lpdwPlay = snd_pcm_frames_to_bytes(This->pcm, hw_pptr);
 662     if (lpdwWrite)
 663         *lpdwWrite = snd_pcm_frames_to_bytes(This->pcm, hw_wptr);
 664
 665     TRACE("hw_pptr=0x%08x, hw_wptr=0x%08x playpos=%d, writepos=%d\n", (unsigned int)hw_pptr, (unsigned int)hw_wptr, lpdwPlay?*lpdwPlay:-1, lpdwWrite?*lpdwWrite:-1);
 666     return DS_OK;
 667 }
 668
 669 static HRESULT WINAPI IDsDriverBufferImpl_Play(PIDSDRIVERBUFFER iface, DWORD dwRes1, DWORD dwRes2, DWORD dwFlags)
 670 {
 671     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
 672     TRACE("(%p,%x,%x,%x)\n",iface,dwRes1,dwRes2,dwFlags);
 673
 674     /* **** */
 675     EnterCriticalSection(&This->pcm_crst);
 676     snd_pcm_start(This->pcm);
 677     /* **** */
 678     LeaveCriticalSection(&This->pcm_crst);
 679     return DS_OK;
 680 }
 681
 682 static HRESULT WINAPI IDsDriverBufferImpl_Stop(PIDSDRIVERBUFFER iface)
 683 {
 684     const snd_pcm_channel_area_t *areas;
 685     snd_pcm_uframes_t avail;
 686     snd_pcm_format_t format;
 687     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
 688     TRACE("(%p)\n",iface);
 689
 690     /* **** */
 691     EnterCriticalSection(&This->pcm_crst);
 692     avail = This->mmap_buflen_frames;
 693     snd_pcm_drop(This->pcm);
 694     snd_pcm_prepare(This->pcm);
 695     avail = snd_pcm_avail_update(This->pcm);
 696     snd_pcm_hw_params_get_format(This->hw_params, &format);
 697     if (This->mmap)
 698     {
 699         snd_pcm_mmap_begin(This->pcm, &areas, &This->mmap_pos, &avail);
 700         snd_pcm_format_set_silence(format, areas->addr, This->mmap_buflen_frames);
 701         snd_pcm_mmap_commit(This->pcm, This->mmap_pos, 0);
 702     }
 703     else
 704     {
 705         snd_pcm_format_set_silence(format, This->mmap_buffer, This->mmap_buflen_frames);
 706         snd_pcm_writei(This->pcm, This->mmap_buffer, This->mmap_buflen_frames);
 707         This->mmap_pos = 0;
 708     }
 709
 710     /* **** */
 711     LeaveCriticalSection(&This->pcm_crst);
 712     return DS_OK;
 713 }
 714
 715 static const IDsDriverBufferVtbl dsdbvt =
 716 {
 717     IDsDriverBufferImpl_QueryInterface,
 718     IDsDriverBufferImpl_AddRef,
 719     IDsDriverBufferImpl_Release,
 720     IDsDriverBufferImpl_Lock,
 721     IDsDriverBufferImpl_Unlock,
 722     IDsDriverBufferImpl_SetFormat,
 723     IDsDriverBufferImpl_SetFrequency,
 724     IDsDriverBufferImpl_SetVolumePan,
 725     IDsDriverBufferImpl_SetPosition,
 726     IDsDriverBufferImpl_GetPosition,
 727     IDsDriverBufferImpl_Play,
 728     IDsDriverBufferImpl_Stop
 729 };
 730
 731 static HRESULT WINAPI IDsDriverImpl_QueryInterface(PIDSDRIVER iface, REFIID riid, LPVOID *ppobj)
 732 {
 733     /* IDsDriverImpl *This = (IDsDriverImpl *)iface; */
 734     FIXME("(%p): stub!\n",iface);
 735     return DSERR_UNSUPPORTED;
 736 }
 737
 738 static ULONG WINAPI IDsDriverImpl_AddRef(PIDSDRIVER iface)
 739 {
 740     IDsDriverImpl *This = (IDsDriverImpl *)iface;
 741     ULONG refCount = InterlockedIncrement(&This->ref);
 742
 743     TRACE("(%p)->(ref before=%u)\n",This, refCount - 1);
 744
 745     return refCount;
 746 }
 747
 748 static ULONG WINAPI IDsDriverImpl_Release(PIDSDRIVER iface)
 749 {
 750     IDsDriverImpl *This = (IDsDriverImpl *)iface;
 751     ULONG refCount = InterlockedDecrement(&This->ref);
 752
 753     TRACE("(%p)->(ref before=%u)\n",This, refCount + 1);
 754
 755     if (refCount)
 756         return refCount;
 757
 758     HeapFree(GetProcessHeap(), 0, This);
 759     return 0;
 760 }
 761
 762 static HRESULT WINAPI IDsDriverImpl_GetDriverDesc(PIDSDRIVER iface, PDSDRIVERDESC pDesc)
 763 {
 764     IDsDriverImpl *This = (IDsDriverImpl *)iface;
 765     TRACE("(%p,%p)\n",iface,pDesc);
 766     *pDesc                      = WOutDev[This->wDevID].ds_desc;
 767     pDesc->dwFlags              = DSDDESC_DONTNEEDSECONDARYLOCK | DSDDESC_DONTNEEDWRITELEAD;
 768     pDesc->dnDevNode            = WOutDev[This->wDevID].waveDesc.dnDevNode;
 769     pDesc->wVxdId               = 0;
 770     pDesc->wReserved            = 0;
 771     pDesc->ulDeviceNum          = This->wDevID;
 772     pDesc->dwHeapType           = DSDHEAP_NOHEAP;
 773     pDesc->pvDirectDrawHeap     = NULL;
 774     pDesc->dwMemStartAddress    = 0xDEAD0000;
 775     pDesc->dwMemEndAddress      = 0xDEAF0000;
 776     pDesc->dwMemAllocExtra      = 0;
 777     pDesc->pvReserved1          = NULL;
 778     pDesc->pvReserved2          = NULL;
 779     return DS_OK;
 780 }
 781
 782 static HRESULT WINAPI IDsDriverImpl_Open(PIDSDRIVER iface)
 783 {
 784     HRESULT hr = S_OK;
 785     IDsDriverImpl *This = (IDsDriverImpl *)iface;
 786     int err=0;
 787     snd_pcm_t *pcm = NULL;
 788     snd_pcm_hw_params_t *hw_params;
 789
 790     /* While this is not really needed, it is a good idea to do this,
 791      * to see if sound can be initialized */
 792
 793     hw_params = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, snd_pcm_hw_params_sizeof());
 794
 795     if (!hw_params)
 796     {
 797         hr = DSERR_OUTOFMEMORY;
 798         goto unalloc;
 799     }
 800
 801     err = snd_pcm_open(&pcm, WOutDev[This->wDevID].pcmname, SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
 802     if (err < 0) goto err;
 803     err = snd_pcm_hw_params_any(pcm, hw_params);
 804     if (err < 0) goto err;
 805     err = snd_pcm_hw_params_set_access (pcm, hw_params, SND_PCM_ACCESS_MMAP_INTERLEAVED);
 806     if (err < 0)
 807         err = snd_pcm_hw_params_set_access (pcm, hw_params, SND_PCM_ACCESS_RW_INTERLEAVED);
 808     if (err < 0) goto err;
 809
 810     TRACE("Success\n");
 811     snd_pcm_close(pcm);
 812     goto unalloc;
 813
 814     err:
 815     hr = DSERR_GENERIC;
 816     FIXME("Failed to open device: %s\n", snd_strerror(err));
 817     if (pcm)
 818         snd_pcm_close(pcm);
 819     unalloc:
 820     HeapFree(GetProcessHeap(), 0, hw_params);
 821     if (hr != S_OK)
 822         WARN("--> %08x\n", hr);
 823     return hr;
 824 }
 825
 826 static HRESULT WINAPI IDsDriverImpl_Close(PIDSDRIVER iface)
 827 {
 828     IDsDriverImpl *This = (IDsDriverImpl *)iface;
 829     TRACE("(%p) stub, harmless\n",This);
 830     return DS_OK;
 831 }
 832
 833 static HRESULT WINAPI IDsDriverImpl_GetCaps(PIDSDRIVER iface, PDSDRIVERCAPS pCaps)
 834 {
 835     IDsDriverImpl *This = (IDsDriverImpl *)iface;
 836     TRACE("(%p,%p)\n",iface,pCaps);
 837     *pCaps = WOutDev[This->wDevID].ds_caps;
 838     return DS_OK;
 839 }
 840
 841 static HRESULT WINAPI IDsDriverImpl_CreateSoundBuffer(PIDSDRIVER iface,
 842                                                       LPWAVEFORMATEX pwfx,
 843                                                       DWORD dwFlags, DWORD dwCardAddress,
 844                                                       LPDWORD pdwcbBufferSize,
 845                                                       LPBYTE *ppbBuffer,
 846                                                       LPVOID *ppvObj)
 847 {
 848     IDsDriverImpl *This = (IDsDriverImpl *)iface;
 849     IDsDriverBufferImpl** ippdsdb = (IDsDriverBufferImpl**)ppvObj;
 850     HRESULT err;
 851
 852     TRACE("(%p,%p,%x,%x)\n",iface,pwfx,dwFlags,dwCardAddress);
 853     /* we only support primary buffers... for now */
 854     if (!(dwFlags & DSBCAPS_PRIMARYBUFFER))
 855         return DSERR_UNSUPPORTED;
 856     if (This->primary)
 857         return DSERR_ALLOCATED;
 858
 859     *ippdsdb = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(IDsDriverBufferImpl));
 860     if (*ippdsdb == NULL)
 861         return DSERR_OUTOFMEMORY;
 862
 863     (*ippdsdb)->hw_params = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, snd_pcm_hw_params_sizeof());
 864     (*ippdsdb)->sw_params = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, snd_pcm_sw_params_sizeof());
 865     if (!(*ippdsdb)->hw_params || !(*ippdsdb)->sw_params)
 866     {
 867         HeapFree(GetProcessHeap(), 0, (*ippdsdb)->sw_params);
 868         HeapFree(GetProcessHeap(), 0, (*ippdsdb)->hw_params);
 869         return DSERR_OUTOFMEMORY;
 870     }
 871     (*ippdsdb)->lpVtbl  = &dsdbvt;
 872     (*ippdsdb)->ref     = 1;
 873     (*ippdsdb)->drv     = This;
 874     InitializeCriticalSection(&(*ippdsdb)->pcm_crst);
 875     (*ippdsdb)->pcm_crst.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": ALSA_DSOUTPUT.pcm_crst");
 876
 877     /* SetFormat has to re-initialize pcm here anyway */
 878     err = SetFormat(*ippdsdb, pwfx);
 879     if (FAILED(err))
 880     {
 881         WARN("Error occurred: %08x\n", err);
 882         goto err;
 883     }
 884
 885     if (dwFlags & DSBCAPS_PRIMARYBUFFER)
 886         This->primary = *ippdsdb;
 887
 888     *pdwcbBufferSize = (*ippdsdb)->mmap_buflen_bytes;
 889     *ppbBuffer = (*ippdsdb)->mmap_buffer;
 890
 891     /* buffer is ready to go */
 892     TRACE("buffer created at %p\n", *ippdsdb);
 893     return err;
 894
 895     err:
 896     HeapFree(GetProcessHeap(), 0, (*ippdsdb)->sw_params);
 897     HeapFree(GetProcessHeap(), 0, (*ippdsdb)->hw_params);
 898     HeapFree(GetProcessHeap(), 0, *ippdsdb);
 899     *ippdsdb = NULL;
 900     return err;
 901 }
 902
 903 static HRESULT WINAPI IDsDriverImpl_DuplicateSoundBuffer(PIDSDRIVER iface,
 904                                                          PIDSDRIVERBUFFER pBuffer,
 905                                                          LPVOID *ppvObj)
 906 {
 907     IDsDriverImpl *This = (IDsDriverImpl *)iface;
 908     FIXME("(%p,%p): stub\n",This,pBuffer);
 909     return DSERR_INVALIDCALL;
 910 }
 911
 912 static const IDsDriverVtbl dsdvt =
 913 {
 914     IDsDriverImpl_QueryInterface,
 915     IDsDriverImpl_AddRef,
 916     IDsDriverImpl_Release,
 917     IDsDriverImpl_GetDriverDesc,
 918     IDsDriverImpl_Open,
 919     IDsDriverImpl_Close,
 920     IDsDriverImpl_GetCaps,
 921     IDsDriverImpl_CreateSoundBuffer,
 922     IDsDriverImpl_DuplicateSoundBuffer
 923 };
 924
 925 DWORD wodDsCreate(UINT wDevID, PIDSDRIVER* drv)
 926 {
 927     IDsDriverImpl** idrv = (IDsDriverImpl**)drv;
 928
 929     TRACE("driver created\n");
 930
 931     *idrv = HeapAlloc(GetProcessHeap(),0,sizeof(IDsDriverImpl));
 932     if (!*idrv)
 933         return MMSYSERR_NOMEM;
 934     (*idrv)->lpVtbl     = &dsdvt;
 935     (*idrv)->ref        = 1;
 936
 937     (*idrv)->wDevID     = wDevID;
 938     (*idrv)->primary    = NULL;
 939     return MMSYSERR_NOERROR;
 940 }
 941
 942 DWORD wodDsDesc(UINT wDevID, PDSDRIVERDESC desc)
 943 {
 944     *desc = WOutDev[wDevID].ds_desc;
 945     return MMSYSERR_NOERROR;
 946 }
 947
 948 #endif /* HAVE_ALSA */