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 <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     }
 251     else
 252     {
 253         err = snd_pcm_mmap_begin(pcm, &areas, &ofs, &avail);
 254         if ( err < 0 )
 255         {
 256             ERR("Can't map sound device for direct access: %s/%d\n", snd_strerror(err), err);
 257             return DSERR_GENERIC;
 258         }
 259         snd_pcm_format_set_silence(format, areas->addr, pdbi->mmap_buflen_frames);
 260         pdbi->mmap_pos = ofs + snd_pcm_mmap_commit(pcm, ofs, 0);
 261         pdbi->mmap_buffer = areas->addr;
 262     }
 263
 264     TRACE("created mmap buffer of %ld frames (%d bytes) at %p\n",
 265         frames, pdbi->mmap_buflen_bytes, pdbi->mmap_buffer);
 266
 267     return DS_OK;
 268 }
 269
 270 static HRESULT WINAPI IDsDriverBufferImpl_QueryInterface(PIDSDRIVERBUFFER iface, REFIID riid, LPVOID *ppobj)
 271 {
 272     /* IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface; */
 273     FIXME("(): stub!\n");
 274     return DSERR_UNSUPPORTED;
 275 }
 276
 277 static ULONG WINAPI IDsDriverBufferImpl_AddRef(PIDSDRIVERBUFFER iface)
 278 {
 279     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
 280     ULONG refCount = InterlockedIncrement(&This->ref);
 281
 282     TRACE("(%p)->(ref before=%u)\n",This, refCount - 1);
 283
 284     return refCount;
 285 }
 286
 287 static ULONG WINAPI IDsDriverBufferImpl_Release(PIDSDRIVERBUFFER iface)
 288 {
 289     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
 290     ULONG refCount = InterlockedDecrement(&This->ref);
 291
 292     TRACE("(%p)->(ref before=%u)\n",This, refCount + 1);
 293
 294     if (refCount)
 295         return refCount;
 296
 297     TRACE("mmap buffer %p destroyed\n", This->mmap_buffer);
 298
 299     if (This == This->drv->primary)
 300         This->drv->primary = NULL;
 301
 302     This->pcm_crst.DebugInfo->Spare[0] = 0;
 303     DeleteCriticalSection(&This->pcm_crst);
 304
 305     snd_pcm_drop(This->pcm);
 306     snd_pcm_close(This->pcm);
 307     This->pcm = NULL;
 308     HeapFree(GetProcessHeap(), 0, This->sw_params);
 309     HeapFree(GetProcessHeap(), 0, This->hw_params);
 310     if (!This->mmap)
 311         HeapFree(GetProcessHeap(), 0, This->mmap_buffer);
 312     HeapFree(GetProcessHeap(), 0, This);
 313     return 0;
 314 }
 315
 316 static HRESULT WINAPI IDsDriverBufferImpl_Lock(PIDSDRIVERBUFFER iface,
 317                                                LPVOID*ppvAudio1,LPDWORD pdwLen1,
 318                                                LPVOID*ppvAudio2,LPDWORD pdwLen2,
 319                                                DWORD dwWritePosition,DWORD dwWriteLen,
 320                                                DWORD dwFlags)
 321 {
 322     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
 323     snd_pcm_uframes_t writepos;
 324
 325     TRACE("%d bytes from %d\n", dwWriteLen, dwWritePosition);
 326
 327     /* **** */
 328     EnterCriticalSection(&This->pcm_crst);
 329
 330     if (dwFlags & DSBLOCK_ENTIREBUFFER)
 331         dwWriteLen = This->mmap_buflen_bytes;
 332
 333     if (dwWriteLen > This->mmap_buflen_bytes || dwWritePosition >= This->mmap_buflen_bytes)
 334     {
 335         /* **** */
 336         LeaveCriticalSection(&This->pcm_crst);
 337         return DSERR_INVALIDPARAM;
 338     }
 339
 340     if (ppvAudio2) *ppvAudio2 = NULL;
 341     if (pdwLen2) *pdwLen2 = 0;
 342
 343     *ppvAudio1 = This->mmap_buffer + dwWritePosition;
 344     *pdwLen1 = dwWriteLen;
 345
 346     if (dwWritePosition+dwWriteLen > This->mmap_buflen_bytes)
 347     {
 348         DWORD remainder = This->mmap_buflen_bytes - dwWritePosition;
 349         *pdwLen1 = remainder;
 350
 351         if (ppvAudio2 && pdwLen2)
 352         {
 353             *ppvAudio2 = This->mmap_buffer;
 354             *pdwLen2 = dwWriteLen - remainder;
 355         }
 356         else dwWriteLen = remainder;
 357     }
 358
 359     writepos = snd_pcm_bytes_to_frames(This->pcm, dwWritePosition);
 360     if (writepos == This->mmap_pos)
 361     {
 362         const snd_pcm_channel_area_t *areas;
 363         snd_pcm_uframes_t writelen = snd_pcm_bytes_to_frames(This->pcm, dwWriteLen), putin = writelen;
 364         TRACE("Hit mmap_pos, locking data!\n");
 365         if (This->mmap)
 366             snd_pcm_mmap_begin(This->pcm, &areas, &This->mmap_pos, &putin);
 367     }
 368     else
 369         WARN("mmap_pos (%lu) != writepos (%lu) not locking data!\n", This->mmap_pos, writepos);
 370
 371     LeaveCriticalSection(&This->pcm_crst);
 372     /* **** */
 373     return DS_OK;
 374 }
 375
 376 static HRESULT WINAPI IDsDriverBufferImpl_Unlock(PIDSDRIVERBUFFER iface,
 377                                                  LPVOID pvAudio1,DWORD dwLen1,
 378                                                  LPVOID pvAudio2,DWORD dwLen2)
 379 {
 380     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
 381     snd_pcm_uframes_t writepos;
 382
 383     if (!dwLen1)
 384         return DS_OK;
 385
 386     /* **** */
 387     EnterCriticalSection(&This->pcm_crst);
 388
 389     writepos = snd_pcm_bytes_to_frames(This->pcm, (DWORD_PTR)pvAudio1 - (DWORD_PTR)This->mmap_buffer);
 390     if (writepos == This->mmap_pos)
 391     {
 392         const snd_pcm_channel_area_t *areas;
 393         snd_pcm_uframes_t writelen = snd_pcm_bytes_to_frames(This->pcm, dwLen1);
 394         TRACE("Committing data\n");
 395         if (This->mmap)
 396             This->mmap_pos += snd_pcm_mmap_commit(This->pcm, This->mmap_pos, writelen);
 397         else
 398         {
 399             int ret;
 400             ret = snd_pcm_writei(This->pcm, pvAudio1, writelen);
 401             if (ret == -EPIPE)
 402             {
 403                 WARN("Underrun occurred\n");
 404                 snd_pcm_prepare(This->pcm);
 405                 ret = snd_pcm_writei(This->pcm, pvAudio1, writelen);
 406                 snd_pcm_start(This->pcm);
 407             }
 408             if (ret < 0)
 409                 WARN("Committing data: %d / %s (%p %ld)\n", ret, snd_strerror(ret), pvAudio1, writelen);
 410             This->mmap_pos += writelen;
 411         }
 412
 413         if (This->mmap_pos == This->mmap_buflen_frames)
 414             This->mmap_pos = 0;
 415         if (!This->mmap_pos && dwLen2)
 416         {
 417             writelen = snd_pcm_bytes_to_frames(This->pcm, dwLen2);
 418             if (This->mmap)
 419             {
 420                 snd_pcm_mmap_begin(This->pcm, &areas, &This->mmap_pos, &writelen);
 421                 This->mmap_pos += snd_pcm_mmap_commit(This->pcm, This->mmap_pos, writelen);
 422             }
 423             else
 424             {
 425                 int ret;
 426                 ret = snd_pcm_writei(This->pcm, pvAudio2, writelen);
 427                 This->mmap_pos = writelen;
 428             }
 429             assert(This->mmap_pos < This->mmap_buflen_frames);
 430         }
 431     }
 432     LeaveCriticalSection(&This->pcm_crst);
 433     /* **** */
 434
 435     return DS_OK;
 436 }
 437
 438 static HRESULT SetFormat(IDsDriverBufferImpl *This, LPWAVEFORMATEX pwfx)
 439 {
 440     snd_pcm_t *pcm = NULL;
 441     snd_pcm_hw_params_t *hw_params = This->hw_params;
 442     unsigned int buffer_time = 500000;
 443     snd_pcm_format_t format = -1;
 444     snd_pcm_uframes_t psize;
 445     DWORD rate = pwfx->nSamplesPerSec;
 446     int err=0;
 447
 448     switch (pwfx->wBitsPerSample)
 449     {
 450         case  8: format = SND_PCM_FORMAT_U8; break;
 451         case 16: format = SND_PCM_FORMAT_S16_LE; break;
 452         case 24: format = SND_PCM_FORMAT_S24_3LE; break;
 453         case 32: format = SND_PCM_FORMAT_S32_LE; break;
 454         default: FIXME("Unsupported bpp: %d\n", pwfx->wBitsPerSample); return DSERR_GENERIC;
 455     }
 456
 457     err = snd_pcm_open(&pcm, WOutDev[This->drv->wDevID].pcmname, SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
 458     if (err < 0)
 459     {
 460         if (errno != EBUSY || !This->pcm)
 461         {
 462             WARN("Cannot open sound device: %s\n", snd_strerror(err));
 463             return DSERR_GENERIC;
 464         }
 465         snd_pcm_drop(This->pcm);
 466         snd_pcm_close(This->pcm);
 467         This->pcm = NULL;
 468         err = snd_pcm_open(&pcm, WOutDev[This->drv->wDevID].pcmname, SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
 469         if (err < 0)
 470         {
 471             WARN("Cannot open sound device: %s\n", snd_strerror(err));
 472             return DSERR_BUFFERLOST;
 473         }
 474     }
 475
 476     /* Set some defaults */
 477     snd_pcm_hw_params_any(pcm, hw_params);
 478     err = snd_pcm_hw_params_set_channels(pcm, hw_params, pwfx->nChannels);
 479     if (err < 0) { WARN("Could not set channels to %d\n", pwfx->nChannels); goto err; }
 480
 481     err = snd_pcm_hw_params_set_format(pcm, hw_params, format);
 482     if (err < 0) { WARN("Could not set format to %d bpp\n", pwfx->wBitsPerSample); goto err; }
 483
 484     /* Alsa's rate resampling is only used if the application specifically requests
 485      * a buffer at a certain frequency, else it is better to disable it due to unwanted
 486      * side effects, which may include: Less granular pointer, changing buffer sizes, etc
 487      */
 488 #if SND_LIB_VERSION >= 0x010009
 489     snd_pcm_hw_params_set_rate_resample(pcm, hw_params, 0);
 490 #endif
 491
 492     err = snd_pcm_hw_params_set_rate_near(pcm, hw_params, &rate, NULL);
 493     if (err < 0) { rate = pwfx->nSamplesPerSec; WARN("Could not set rate\n"); goto err; }
 494
 495     if (!ALSA_NearMatch(rate, pwfx->nSamplesPerSec))
 496     {
 497         WARN("Could not set sound rate to %d, but instead to %d\n", pwfx->nSamplesPerSec, rate);
 498         pwfx->nSamplesPerSec = rate;
 499         pwfx->nAvgBytesPerSec = rate * pwfx->nBlockAlign;
 500         /* Let DirectSound detect this */
 501     }
 502
 503     snd_pcm_hw_params_set_periods_integer(pcm, hw_params);
 504     snd_pcm_hw_params_set_buffer_time_near(pcm, hw_params, &buffer_time, NULL);
 505     buffer_time = 10000;
 506     snd_pcm_hw_params_set_period_time_near(pcm, hw_params, &buffer_time, NULL);
 507
 508     err = snd_pcm_hw_params_get_period_size(hw_params, &psize, NULL);
 509     buffer_time = 16;
 510     snd_pcm_hw_params_set_periods_near(pcm, hw_params, &buffer_time, NULL);
 511
 512     if (!This->mmap)
 513     {
 514         HeapFree(GetProcessHeap(), 0, This->mmap_buffer);
 515         This->mmap_buffer = NULL;
 516     }
 517
 518     err = snd_pcm_hw_params_set_access (pcm, hw_params, SND_PCM_ACCESS_MMAP_INTERLEAVED);
 519     if (err >= 0)
 520         This->mmap = 1;
 521     else
 522     {
 523         This->mmap = 0;
 524         err = snd_pcm_hw_params_set_access (pcm, hw_params, SND_PCM_ACCESS_RW_INTERLEAVED);
 525     }
 526
 527     err = snd_pcm_hw_params(pcm, hw_params);
 528     err = snd_pcm_sw_params(pcm, This->sw_params);
 529     snd_pcm_prepare(pcm);
 530
 531     /* ALSA needs at least 3 buffers to work successfully */
 532     This->mmap_commitahead = 3 * psize;
 533     while (This->mmap_commitahead <= 512)
 534         This->mmap_commitahead += psize;
 535
 536     if (This->pcm)
 537     {
 538         snd_pcm_drop(This->pcm);
 539         snd_pcm_close(This->pcm);
 540     }
 541     This->pcm = pcm;
 542     snd_pcm_prepare(This->pcm);
 543     DSDB_CreateMMAP(This);
 544     return S_OK;
 545
 546     err:
 547     if (err < 0)
 548         WARN("Failed to apply changes: %s\n", snd_strerror(err));
 549
 550     if (!This->pcm)
 551         This->pcm = pcm;
 552     else
 553         snd_pcm_close(pcm);
 554
 555     if (This->pcm)
 556         snd_pcm_hw_params_current(This->pcm, This->hw_params);
 557
 558     return DSERR_BADFORMAT;
 559 }
 560
 561 static HRESULT WINAPI IDsDriverBufferImpl_SetFormat(PIDSDRIVERBUFFER iface, LPWAVEFORMATEX pwfx)
 562 {
 563     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
 564     HRESULT hr = S_OK;
 565
 566     TRACE("(%p, %p)\n", iface, pwfx);
 567
 568     /* **** */
 569     EnterCriticalSection(&This->pcm_crst);
 570     hr = SetFormat(This, pwfx);
 571     /* **** */
 572     LeaveCriticalSection(&This->pcm_crst);
 573
 574     if (hr == DS_OK)
 575         return S_FALSE;
 576     return hr;
 577 }
 578
 579 static HRESULT WINAPI IDsDriverBufferImpl_SetFrequency(PIDSDRIVERBUFFER iface, DWORD dwFreq)
 580 {
 581     /* IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface; */
 582     FIXME("(%p,%d): stub\n",iface,dwFreq);
 583     return S_OK;
 584 }
 585
 586 static HRESULT WINAPI IDsDriverBufferImpl_SetVolumePan(PIDSDRIVERBUFFER iface, PDSVOLUMEPAN pVolPan)
 587 {
 588     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
 589     FIXME("(%p,%p): stub\n",This,pVolPan);
 590     /* TODO: Bring volume control back */
 591     return DS_OK;
 592 }
 593
 594 static HRESULT WINAPI IDsDriverBufferImpl_SetPosition(PIDSDRIVERBUFFER iface, DWORD dwNewPos)
 595 {
 596     /* IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface; */
 597     /* I don't even think alsa allows this */
 598     FIXME("(%p,%d): stub\n",iface,dwNewPos);
 599     return DSERR_UNSUPPORTED;
 600 }
 601
 602 static HRESULT WINAPI IDsDriverBufferImpl_GetPosition(PIDSDRIVERBUFFER iface,
 603                                                       LPDWORD lpdwPlay, LPDWORD lpdwWrite)
 604 {
 605     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
 606     snd_pcm_uframes_t hw_pptr, hw_wptr;
 607     snd_pcm_state_t state;
 608
 609     /* **** */
 610     EnterCriticalSection(&This->pcm_crst);
 611
 612     if (!This->pcm)
 613     {
 614         FIXME("Bad pointer for pcm: %p\n", This->pcm);
 615         LeaveCriticalSection(&This->pcm_crst);
 616         return DSERR_GENERIC;
 617     }
 618
 619     if (!lpdwPlay && !lpdwWrite)
 620         CommitAll(This);
 621
 622     state = snd_pcm_state(This->pcm);
 623
 624     if (state != SND_PCM_STATE_PREPARED && state != SND_PCM_STATE_RUNNING)
 625     {
 626         CheckXRUN(This);
 627         state = snd_pcm_state(This->pcm);
 628     }
 629     if (state == SND_PCM_STATE_RUNNING)
 630     {
 631         snd_pcm_sframes_t used = This->mmap_buflen_frames - snd_pcm_avail_update(This->pcm);
 632
 633         if (used < 0)
 634         {
 635             WARN("Underrun: %ld / %ld\n", used, snd_pcm_avail_update(This->pcm));
 636             if (This->mmap)
 637             {
 638                 snd_pcm_forward(This->pcm, -used);
 639                 This->mmap_pos += -used;
 640                 This->mmap_pos %= This->mmap_buflen_frames;
 641             }
 642             used = 0;
 643         }
 644
 645         if (This->mmap_pos > used)
 646             hw_pptr = This->mmap_pos - used;
 647         else
 648             hw_pptr = This->mmap_buflen_frames + This->mmap_pos - used;
 649         hw_pptr %= This->mmap_buflen_frames;
 650
 651         TRACE("At position: %ld (%ld) - Used %ld\n", hw_pptr, This->mmap_pos, used);
 652     }
 653     else hw_pptr = This->mmap_pos;
 654     hw_wptr = This->mmap_pos;
 655
 656     LeaveCriticalSection(&This->pcm_crst);
 657     /* **** */
 658
 659     if (lpdwPlay)
 660         *lpdwPlay = snd_pcm_frames_to_bytes(This->pcm, hw_pptr);
 661     if (lpdwWrite)
 662         *lpdwWrite = snd_pcm_frames_to_bytes(This->pcm, hw_wptr);
 663
 664     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);
 665     return DS_OK;
 666 }
 667
 668 static HRESULT WINAPI IDsDriverBufferImpl_Play(PIDSDRIVERBUFFER iface, DWORD dwRes1, DWORD dwRes2, DWORD dwFlags)
 669 {
 670     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
 671     TRACE("(%p,%x,%x,%x)\n",iface,dwRes1,dwRes2,dwFlags);
 672
 673     /* **** */
 674     EnterCriticalSection(&This->pcm_crst);
 675     snd_pcm_start(This->pcm);
 676     /* **** */
 677     LeaveCriticalSection(&This->pcm_crst);
 678     return DS_OK;
 679 }
 680
 681 static HRESULT WINAPI IDsDriverBufferImpl_Stop(PIDSDRIVERBUFFER iface)
 682 {
 683     const snd_pcm_channel_area_t *areas;
 684     snd_pcm_uframes_t avail;
 685     snd_pcm_format_t format;
 686     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
 687     TRACE("(%p)\n",iface);
 688
 689     /* **** */
 690     EnterCriticalSection(&This->pcm_crst);
 691     avail = This->mmap_buflen_frames;
 692     snd_pcm_drop(This->pcm);
 693     snd_pcm_prepare(This->pcm);
 694     avail = snd_pcm_avail_update(This->pcm);
 695     snd_pcm_hw_params_get_format(This->hw_params, &format);
 696     if (This->mmap)
 697     {
 698         snd_pcm_mmap_begin(This->pcm, &areas, &This->mmap_pos, &avail);
 699         snd_pcm_format_set_silence(format, areas->addr, This->mmap_buflen_frames);
 700         snd_pcm_mmap_commit(This->pcm, This->mmap_pos, 0);
 701     }
 702     else
 703     {
 704         snd_pcm_format_set_silence(format, This->mmap_buffer, This->mmap_buflen_frames);
 705         snd_pcm_writei(This->pcm, This->mmap_buffer, This->mmap_buflen_frames);
 706         This->mmap_pos = 0;
 707     }
 708
 709     /* **** */
 710     LeaveCriticalSection(&This->pcm_crst);
 711     return DS_OK;
 712 }
 713
 714 static const IDsDriverBufferVtbl dsdbvt =
 715 {
 716     IDsDriverBufferImpl_QueryInterface,
 717     IDsDriverBufferImpl_AddRef,
 718     IDsDriverBufferImpl_Release,
 719     IDsDriverBufferImpl_Lock,
 720     IDsDriverBufferImpl_Unlock,
 721     IDsDriverBufferImpl_SetFormat,
 722     IDsDriverBufferImpl_SetFrequency,
 723     IDsDriverBufferImpl_SetVolumePan,
 724     IDsDriverBufferImpl_SetPosition,
 725     IDsDriverBufferImpl_GetPosition,
 726     IDsDriverBufferImpl_Play,
 727     IDsDriverBufferImpl_Stop
 728 };
 729
 730 static HRESULT WINAPI IDsDriverImpl_QueryInterface(PIDSDRIVER iface, REFIID riid, LPVOID *ppobj)
 731 {
 732     /* IDsDriverImpl *This = (IDsDriverImpl *)iface; */
 733     FIXME("(%p): stub!\n",iface);
 734     return DSERR_UNSUPPORTED;
 735 }
 736
 737 static ULONG WINAPI IDsDriverImpl_AddRef(PIDSDRIVER iface)
 738 {
 739     IDsDriverImpl *This = (IDsDriverImpl *)iface;
 740     ULONG refCount = InterlockedIncrement(&This->ref);
 741
 742     TRACE("(%p)->(ref before=%u)\n",This, refCount - 1);
 743
 744     return refCount;
 745 }
 746
 747 static ULONG WINAPI IDsDriverImpl_Release(PIDSDRIVER iface)
 748 {
 749     IDsDriverImpl *This = (IDsDriverImpl *)iface;
 750     ULONG refCount = InterlockedDecrement(&This->ref);
 751
 752     TRACE("(%p)->(ref before=%u)\n",This, refCount + 1);
 753
 754     if (refCount)
 755         return refCount;
 756
 757     HeapFree(GetProcessHeap(), 0, This);
 758     return 0;
 759 }
 760
 761 static HRESULT WINAPI IDsDriverImpl_GetDriverDesc(PIDSDRIVER iface, PDSDRIVERDESC pDesc)
 762 {
 763     IDsDriverImpl *This = (IDsDriverImpl *)iface;
 764     TRACE("(%p,%p)\n",iface,pDesc);
 765     *pDesc                      = WOutDev[This->wDevID].ds_desc;
 766     pDesc->dwFlags              = DSDDESC_DONTNEEDSECONDARYLOCK | DSDDESC_DONTNEEDWRITELEAD;
 767     pDesc->dnDevNode            = WOutDev[This->wDevID].waveDesc.dnDevNode;
 768     pDesc->wVxdId               = 0;
 769     pDesc->wReserved            = 0;
 770     pDesc->ulDeviceNum          = This->wDevID;
 771     pDesc->dwHeapType           = DSDHEAP_NOHEAP;
 772     pDesc->pvDirectDrawHeap     = NULL;
 773     pDesc->dwMemStartAddress    = 0xDEAD0000;
 774     pDesc->dwMemEndAddress      = 0xDEAF0000;
 775     pDesc->dwMemAllocExtra      = 0;
 776     pDesc->pvReserved1          = NULL;
 777     pDesc->pvReserved2          = NULL;
 778     return DS_OK;
 779 }
 780
 781 static HRESULT WINAPI IDsDriverImpl_Open(PIDSDRIVER iface)
 782 {
 783     HRESULT hr = S_OK;
 784     IDsDriverImpl *This = (IDsDriverImpl *)iface;
 785     int err=0;
 786     snd_pcm_t *pcm = NULL;
 787     snd_pcm_hw_params_t *hw_params;
 788
 789     /* While this is not really needed, it is a good idea to do this,
 790      * to see if sound can be initialized */
 791
 792     hw_params = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, snd_pcm_hw_params_sizeof());
 793
 794     if (!hw_params)
 795     {
 796         hr = DSERR_OUTOFMEMORY;
 797         goto unalloc;
 798     }
 799
 800     err = snd_pcm_open(&pcm, WOutDev[This->wDevID].pcmname, SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
 801     if (err < 0) goto err;
 802     err = snd_pcm_hw_params_any(pcm, hw_params);
 803     if (err < 0) goto err;
 804     err = snd_pcm_hw_params_set_access (pcm, hw_params, SND_PCM_ACCESS_MMAP_INTERLEAVED);
 805     if (err < 0)
 806         err = snd_pcm_hw_params_set_access (pcm, hw_params, SND_PCM_ACCESS_RW_INTERLEAVED);
 807     if (err < 0) goto err;
 808
 809     TRACE("Success\n");
 810     snd_pcm_close(pcm);
 811     goto unalloc;
 812
 813     err:
 814     hr = DSERR_GENERIC;
 815     FIXME("Failed to open device: %s\n", snd_strerror(err));
 816     if (pcm)
 817         snd_pcm_close(pcm);
 818     unalloc:
 819     HeapFree(GetProcessHeap(), 0, hw_params);
 820     if (hr != S_OK)
 821         WARN("--> %08x\n", hr);
 822     return hr;
 823 }
 824
 825 static HRESULT WINAPI IDsDriverImpl_Close(PIDSDRIVER iface)
 826 {
 827     IDsDriverImpl *This = (IDsDriverImpl *)iface;
 828     TRACE("(%p) stub, harmless\n",This);
 829     return DS_OK;
 830 }
 831
 832 static HRESULT WINAPI IDsDriverImpl_GetCaps(PIDSDRIVER iface, PDSDRIVERCAPS pCaps)
 833 {
 834     IDsDriverImpl *This = (IDsDriverImpl *)iface;
 835     TRACE("(%p,%p)\n",iface,pCaps);
 836     *pCaps = WOutDev[This->wDevID].ds_caps;
 837     return DS_OK;
 838 }
 839
 840 static HRESULT WINAPI IDsDriverImpl_CreateSoundBuffer(PIDSDRIVER iface,
 841                                                       LPWAVEFORMATEX pwfx,
 842                                                       DWORD dwFlags, DWORD dwCardAddress,
 843                                                       LPDWORD pdwcbBufferSize,
 844                                                       LPBYTE *ppbBuffer,
 845                                                       LPVOID *ppvObj)
 846 {
 847     IDsDriverImpl *This = (IDsDriverImpl *)iface;
 848     IDsDriverBufferImpl** ippdsdb = (IDsDriverBufferImpl**)ppvObj;
 849     HRESULT err;
 850
 851     TRACE("(%p,%p,%x,%x)\n",iface,pwfx,dwFlags,dwCardAddress);
 852     /* we only support primary buffers... for now */
 853     if (!(dwFlags & DSBCAPS_PRIMARYBUFFER))
 854         return DSERR_UNSUPPORTED;
 855     if (This->primary)
 856         return DSERR_ALLOCATED;
 857
 858     *ippdsdb = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(IDsDriverBufferImpl));
 859     if (*ippdsdb == NULL)
 860         return DSERR_OUTOFMEMORY;
 861
 862     (*ippdsdb)->hw_params = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, snd_pcm_hw_params_sizeof());
 863     (*ippdsdb)->sw_params = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, snd_pcm_sw_params_sizeof());
 864     if (!(*ippdsdb)->hw_params || !(*ippdsdb)->sw_params)
 865     {
 866         HeapFree(GetProcessHeap(), 0, (*ippdsdb)->sw_params);
 867         HeapFree(GetProcessHeap(), 0, (*ippdsdb)->hw_params);
 868         return DSERR_OUTOFMEMORY;
 869     }
 870     (*ippdsdb)->lpVtbl  = &dsdbvt;
 871     (*ippdsdb)->ref     = 1;
 872     (*ippdsdb)->drv     = This;
 873     InitializeCriticalSection(&(*ippdsdb)->pcm_crst);
 874     (*ippdsdb)->pcm_crst.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": ALSA_DSOUTPUT.pcm_crst");
 875
 876     /* SetFormat has to re-initialize pcm here anyway */
 877     err = SetFormat(*ippdsdb, pwfx);
 878     if (FAILED(err))
 879     {
 880         WARN("Error occurred: %08x\n", err);
 881         goto err;
 882     }
 883
 884     if (dwFlags & DSBCAPS_PRIMARYBUFFER)
 885         This->primary = *ippdsdb;
 886
 887     *pdwcbBufferSize = (*ippdsdb)->mmap_buflen_bytes;
 888     *ppbBuffer = (*ippdsdb)->mmap_buffer;
 889
 890     /* buffer is ready to go */
 891     TRACE("buffer created at %p\n", *ippdsdb);
 892     return err;
 893
 894     err:
 895     HeapFree(GetProcessHeap(), 0, (*ippdsdb)->sw_params);
 896     HeapFree(GetProcessHeap(), 0, (*ippdsdb)->hw_params);
 897     HeapFree(GetProcessHeap(), 0, *ippdsdb);
 898     *ippdsdb = NULL;
 899     return err;
 900 }
 901
 902 static HRESULT WINAPI IDsDriverImpl_DuplicateSoundBuffer(PIDSDRIVER iface,
 903                                                          PIDSDRIVERBUFFER pBuffer,
 904                                                          LPVOID *ppvObj)
 905 {
 906     IDsDriverImpl *This = (IDsDriverImpl *)iface;
 907     FIXME("(%p,%p): stub\n",This,pBuffer);
 908     return DSERR_INVALIDCALL;
 909 }
 910
 911 static const IDsDriverVtbl dsdvt =
 912 {
 913     IDsDriverImpl_QueryInterface,
 914     IDsDriverImpl_AddRef,
 915     IDsDriverImpl_Release,
 916     IDsDriverImpl_GetDriverDesc,
 917     IDsDriverImpl_Open,
 918     IDsDriverImpl_Close,
 919     IDsDriverImpl_GetCaps,
 920     IDsDriverImpl_CreateSoundBuffer,
 921     IDsDriverImpl_DuplicateSoundBuffer
 922 };
 923
 924 DWORD wodDsCreate(UINT wDevID, PIDSDRIVER* drv)
 925 {
 926     IDsDriverImpl** idrv = (IDsDriverImpl**)drv;
 927
 928     TRACE("driver created\n");
 929
 930     *idrv = HeapAlloc(GetProcessHeap(),0,sizeof(IDsDriverImpl));
 931     if (!*idrv)
 932         return MMSYSERR_NOMEM;
 933     (*idrv)->lpVtbl     = &dsdvt;
 934     (*idrv)->ref        = 1;
 935
 936     (*idrv)->wDevID     = wDevID;
 937     (*idrv)->primary    = NULL;
 938     return MMSYSERR_NOERROR;
 939 }
 940
 941 DWORD wodDsDesc(UINT wDevID, PDSDRIVERDESC desc)
 942 {
 943     *desc = WOutDev[wDevID].ds_desc;
 944     return MMSYSERR_NOERROR;
 945 }
 946
 947 #endif /* HAVE_ALSA */