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 "mmddk.h"
  54
  55 #include "alsa.h"
  56 #include "wine/library.h"
  57 #include "wine/unicode.h"
  58 #include "wine/debug.h"
  59
  60 #ifdef HAVE_ALSA
  61
  62 WINE_DEFAULT_DEBUG_CHANNEL(dsalsa);
  63
  64 typedef struct IDsDriverImpl IDsDriverImpl;
  65 typedef struct IDsDriverBufferImpl IDsDriverBufferImpl;
  66
  67 struct IDsDriverImpl
  68 {
  69     /* IUnknown fields */
  70     const IDsDriverVtbl *lpVtbl;
  71     LONG ref;
  72
  73     /* IDsDriverImpl fields */
  74     IDsDriverBufferImpl* primary;
  75     UINT wDevID;
  76 };
  77
  78 struct IDsDriverBufferImpl
  79 {
  80     const IDsDriverBufferVtbl *lpVtbl;
  81     LONG ref;
  82     IDsDriverImpl* drv;
  83
  84     CRITICAL_SECTION pcm_crst;
  85     LPVOID mmap_buffer;
  86     DWORD mmap_buflen_bytes;
  87
  88     snd_pcm_t *pcm;
  89     snd_pcm_hw_params_t *hw_params;
  90     snd_pcm_sw_params_t *sw_params;
  91     snd_pcm_uframes_t mmap_buflen_frames, mmap_pos, mmap_commitahead;
  92 };
  93
  94 /** Fill buffers, for starting and stopping
  95  * Alsa won't start playing until everything is filled up
  96  * This also updates mmap_pos
  97  *
  98  * Returns: Amount of periods in use so snd_pcm_avail_update
  99  * doesn't have to be called up to 4x in GetPosition()
 100  */
 101 static snd_pcm_uframes_t CommitAll(IDsDriverBufferImpl *This)
 102 {
 103     const snd_pcm_channel_area_t *areas;
 104     snd_pcm_uframes_t used;
 105     const snd_pcm_uframes_t commitahead = This->mmap_commitahead;
 106
 107     used = This->mmap_buflen_frames - snd_pcm_avail_update(This->pcm);
 108     TRACE("%p needs to commit to %lu, used: %lu\n", This, commitahead, used);
 109     if (used < commitahead)
 110     {
 111         snd_pcm_uframes_t done, putin = commitahead - used;
 112         snd_pcm_mmap_begin(This->pcm, &areas, &This->mmap_pos, &putin);
 113         done = snd_pcm_mmap_commit(This->pcm, This->mmap_pos, putin);
 114         This->mmap_pos += done;
 115         used += done;
 116         putin = commitahead - used;
 117
 118         if (This->mmap_pos == This->mmap_buflen_frames && (snd_pcm_sframes_t)putin > 0)
 119         {
 120             snd_pcm_mmap_begin(This->pcm, &areas, &This->mmap_pos, &putin);
 121             done = snd_pcm_mmap_commit(This->pcm, This->mmap_pos, putin);
 122             This->mmap_pos += done;
 123             used += done;
 124         }
 125     }
 126
 127     if (This->mmap_pos == This->mmap_buflen_frames)
 128         This->mmap_pos = 0;
 129
 130     return used;
 131 }
 132
 133 static void CheckXRUN(IDsDriverBufferImpl* This)
 134 {
 135     snd_pcm_state_t state = snd_pcm_state(This->pcm);
 136     snd_pcm_sframes_t delay;
 137     int err;
 138
 139     snd_pcm_hwsync(This->pcm);
 140     snd_pcm_delay(This->pcm, &delay);
 141     if ( state == SND_PCM_STATE_XRUN )
 142     {
 143         err = snd_pcm_prepare(This->pcm);
 144         CommitAll(This);
 145         snd_pcm_start(This->pcm);
 146         WARN("xrun occurred\n");
 147         if ( err < 0 )
 148             ERR("recovery from xrun failed, prepare failed: %s\n", snd_strerror(err));
 149     }
 150     else if ( state == SND_PCM_STATE_SUSPENDED )
 151     {
 152         int err = snd_pcm_resume(This->pcm);
 153         TRACE("recovery from suspension occurred\n");
 154         if (err < 0 && err != -EAGAIN){
 155             err = snd_pcm_prepare(This->pcm);
 156             if (err < 0)
 157                 ERR("recovery from suspend failed, prepare failed: %s\n", snd_strerror(err));
 158         }
 159     } else if ( state != SND_PCM_STATE_RUNNING ) {
 160         FIXME("Unhandled state: %d\n", state);
 161     }
 162 }
 163
 164 /**
 165  * Allocate the memory-mapped buffer for direct sound, and set up the
 166  * callback.
 167  */
 168 static int DSDB_CreateMMAP(IDsDriverBufferImpl* pdbi)
 169 {
 170     snd_pcm_t *pcm = pdbi->pcm;
 171     snd_pcm_format_t format;
 172     snd_pcm_uframes_t frames, ofs, avail, psize, boundary;
 173     unsigned int channels, bits_per_sample, bits_per_frame;
 174     int err, mmap_mode;
 175     const snd_pcm_channel_area_t *areas;
 176     snd_pcm_hw_params_t *hw_params = pdbi->hw_params;
 177     snd_pcm_sw_params_t *sw_params = pdbi->sw_params;
 178
 179     mmap_mode = snd_pcm_type(pcm);
 180
 181     if (mmap_mode == SND_PCM_TYPE_HW)
 182         TRACE("mmap'd buffer is a direct hardware buffer.\n");
 183     else if (mmap_mode == SND_PCM_TYPE_DMIX)
 184         TRACE("mmap'd buffer is an ALSA dmix buffer\n");
 185     else
 186         TRACE("mmap'd buffer is an ALSA type %d buffer\n", mmap_mode);
 187
 188     err = snd_pcm_hw_params_get_period_size(hw_params, &psize, NULL);
 189
 190     err = snd_pcm_hw_params_get_format(hw_params, &format);
 191     err = snd_pcm_hw_params_get_buffer_size(hw_params, &frames);
 192     err = snd_pcm_hw_params_get_channels(hw_params, &channels);
 193     bits_per_sample = snd_pcm_format_physical_width(format);
 194     bits_per_frame = bits_per_sample * channels;
 195
 196     if (TRACE_ON(dsalsa))
 197         ALSA_TraceParameters(hw_params, NULL, FALSE);
 198
 199     TRACE("format=%s  frames=%ld  channels=%d  bits_per_sample=%d  bits_per_frame=%d\n",
 200           snd_pcm_format_name(format), frames, channels, bits_per_sample, bits_per_frame);
 201
 202     pdbi->mmap_buflen_frames = frames;
 203     pdbi->mmap_buflen_bytes = snd_pcm_frames_to_bytes( pcm, frames );
 204
 205     snd_pcm_sw_params_current(pcm, sw_params);
 206     snd_pcm_sw_params_set_start_threshold(pcm, sw_params, 0);
 207     snd_pcm_sw_params_get_boundary(sw_params, &boundary);
 208     snd_pcm_sw_params_set_stop_threshold(pcm, sw_params, boundary);
 209     snd_pcm_sw_params_set_silence_threshold(pcm, sw_params, INT_MAX);
 210     snd_pcm_sw_params_set_silence_size(pcm, sw_params, 0);
 211     snd_pcm_sw_params_set_avail_min(pcm, sw_params, 0);
 212     snd_pcm_sw_params_set_xrun_mode(pcm, sw_params, SND_PCM_XRUN_NONE);
 213     err = snd_pcm_sw_params(pcm, sw_params);
 214
 215     avail = snd_pcm_avail_update(pcm);
 216     if (avail < 0)
 217     {
 218         ERR("No buffer is available: %s.\n", snd_strerror(avail));
 219         return DSERR_GENERIC;
 220     }
 221     err = snd_pcm_mmap_begin(pcm, &areas, &ofs, &avail);
 222     if ( err < 0 )
 223     {
 224         ERR("Can't map sound device for direct access: %s\n", snd_strerror(err));
 225         return DSERR_GENERIC;
 226     }
 227     snd_pcm_format_set_silence(format, areas->addr, pdbi->mmap_buflen_frames);
 228     pdbi->mmap_pos = ofs + snd_pcm_mmap_commit(pcm, ofs, 0);
 229     pdbi->mmap_buffer = areas->addr;
 230
 231     TRACE("created mmap buffer of %ld frames (%d bytes) at %p\n",
 232         frames, pdbi->mmap_buflen_bytes, pdbi->mmap_buffer);
 233
 234     return DS_OK;
 235 }
 236
 237 static HRESULT WINAPI IDsDriverBufferImpl_QueryInterface(PIDSDRIVERBUFFER iface, REFIID riid, LPVOID *ppobj)
 238 {
 239     /* IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface; */
 240     FIXME("(): stub!\n");
 241     return DSERR_UNSUPPORTED;
 242 }
 243
 244 static ULONG WINAPI IDsDriverBufferImpl_AddRef(PIDSDRIVERBUFFER iface)
 245 {
 246     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
 247     ULONG refCount = InterlockedIncrement(&This->ref);
 248
 249     TRACE("(%p)->(ref before=%u)\n",This, refCount - 1);
 250
 251     return refCount;
 252 }
 253
 254 static ULONG WINAPI IDsDriverBufferImpl_Release(PIDSDRIVERBUFFER iface)
 255 {
 256     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
 257     ULONG refCount = InterlockedDecrement(&This->ref);
 258
 259     TRACE("(%p)->(ref before=%u)\n",This, refCount + 1);
 260
 261     if (refCount)
 262         return refCount;
 263
 264     TRACE("mmap buffer %p destroyed\n", This->mmap_buffer);
 265
 266     if (This == This->drv->primary)
 267         This->drv->primary = NULL;
 268
 269     This->pcm_crst.DebugInfo->Spare[0] = 0;
 270     DeleteCriticalSection(&This->pcm_crst);
 271
 272     snd_pcm_drop(This->pcm);
 273     snd_pcm_close(This->pcm);
 274     This->pcm = NULL;
 275     HeapFree(GetProcessHeap(), 0, This->sw_params);
 276     HeapFree(GetProcessHeap(), 0, This->hw_params);
 277     HeapFree(GetProcessHeap(), 0, This);
 278     return 0;
 279 }
 280
 281 static HRESULT WINAPI IDsDriverBufferImpl_Lock(PIDSDRIVERBUFFER iface,
 282                                                LPVOID*ppvAudio1,LPDWORD pdwLen1,
 283                                                LPVOID*ppvAudio2,LPDWORD pdwLen2,
 284                                                DWORD dwWritePosition,DWORD dwWriteLen,
 285                                                DWORD dwFlags)
 286 {
 287     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
 288     snd_pcm_uframes_t writepos;
 289
 290     TRACE("%d bytes from %d\n", dwWriteLen, dwWritePosition);
 291
 292     /* **** */
 293     EnterCriticalSection(&This->pcm_crst);
 294
 295     if (dwWriteLen > This->mmap_buflen_bytes || dwWritePosition >= This->mmap_buflen_bytes)
 296     {
 297         /* **** */
 298         LeaveCriticalSection(&This->pcm_crst);
 299         return DSERR_INVALIDPARAM;
 300     }
 301
 302     if (ppvAudio2) *ppvAudio2 = NULL;
 303     if (pdwLen2) *pdwLen2 = 0;
 304
 305     *ppvAudio1 = (LPBYTE)This->mmap_buffer + dwWritePosition;
 306     *pdwLen1 = dwWriteLen;
 307
 308     if (dwWritePosition+dwWriteLen > This->mmap_buflen_bytes)
 309     {
 310         DWORD remainder = This->mmap_buflen_bytes - dwWritePosition;
 311         *pdwLen1 = remainder;
 312
 313         if (ppvAudio2 && pdwLen2)
 314         {
 315             *ppvAudio2 = This->mmap_buffer;
 316             *pdwLen2 = dwWriteLen - remainder;
 317         }
 318         else dwWriteLen = remainder;
 319     }
 320
 321     writepos = snd_pcm_bytes_to_frames(This->pcm, dwWritePosition);
 322     if (writepos == This->mmap_pos)
 323     {
 324         const snd_pcm_channel_area_t *areas;
 325         snd_pcm_uframes_t writelen = snd_pcm_bytes_to_frames(This->pcm, dwWriteLen), putin = writelen;
 326         TRACE("Hit mmap_pos, locking data!\n");
 327         snd_pcm_mmap_begin(This->pcm, &areas, &This->mmap_pos, &putin);
 328     }
 329
 330     LeaveCriticalSection(&This->pcm_crst);
 331     /* **** */
 332     return DS_OK;
 333 }
 334
 335 static HRESULT WINAPI IDsDriverBufferImpl_Unlock(PIDSDRIVERBUFFER iface,
 336                                                  LPVOID pvAudio1,DWORD dwLen1,
 337                                                  LPVOID pvAudio2,DWORD dwLen2)
 338 {
 339     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
 340     snd_pcm_uframes_t writepos;
 341
 342     if (!dwLen1)
 343         return DS_OK;
 344
 345     /* **** */
 346     EnterCriticalSection(&This->pcm_crst);
 347
 348     writepos = snd_pcm_bytes_to_frames(This->pcm, (DWORD_PTR)pvAudio1 - (DWORD_PTR)This->mmap_buffer);
 349     if (writepos == This->mmap_pos)
 350     {
 351         const snd_pcm_channel_area_t *areas;
 352         snd_pcm_uframes_t writelen = snd_pcm_bytes_to_frames(This->pcm, dwLen1);
 353         TRACE("Committing data\n");
 354         This->mmap_pos += snd_pcm_mmap_commit(This->pcm, This->mmap_pos, writelen);
 355         if (This->mmap_pos == This->mmap_buflen_frames)
 356             This->mmap_pos = 0;
 357         if (!This->mmap_pos && dwLen2)
 358         {
 359             writelen = snd_pcm_bytes_to_frames(This->pcm, dwLen2);
 360             snd_pcm_mmap_begin(This->pcm, &areas, &This->mmap_pos, &writelen);
 361             This->mmap_pos += snd_pcm_mmap_commit(This->pcm, This->mmap_pos, writelen);
 362             assert(This->mmap_pos < This->mmap_buflen_frames);
 363         }
 364     }
 365     LeaveCriticalSection(&This->pcm_crst);
 366     /* **** */
 367
 368     return DS_OK;
 369 }
 370
 371 static HRESULT SetFormat(IDsDriverBufferImpl *This, LPWAVEFORMATEX pwfx, BOOL forced)
 372 {
 373     snd_pcm_t *pcm = NULL;
 374     snd_pcm_hw_params_t *hw_params = This->hw_params;
 375     unsigned int buffer_time = 500000;
 376     snd_pcm_format_t format = -1;
 377     snd_pcm_uframes_t psize;
 378     DWORD rate = pwfx->nSamplesPerSec;
 379     int err=0;
 380
 381     switch (pwfx->wBitsPerSample)
 382     {
 383         case  8: format = SND_PCM_FORMAT_U8; break;
 384         case 16: format = SND_PCM_FORMAT_S16_LE; break;
 385         case 24: format = SND_PCM_FORMAT_S24_LE; break;
 386         case 32: format = SND_PCM_FORMAT_S32_LE; break;
 387         default: FIXME("Unsupported bpp: %d\n", pwfx->wBitsPerSample); return DSERR_GENERIC;
 388     }
 389
 390     /* **** */
 391     EnterCriticalSection(&This->pcm_crst);
 392
 393     err = snd_pcm_open(&pcm, WOutDev[This->drv->wDevID].pcmname, SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
 394
 395     if (err < 0)
 396     {
 397         if (errno != EBUSY || !This->pcm)
 398         {
 399             /* **** */
 400             LeaveCriticalSection(&This->pcm_crst);
 401             WARN("Cannot open sound device: %s\n", snd_strerror(err));
 402             return DSERR_GENERIC;
 403         }
 404         snd_pcm_drop(This->pcm);
 405         snd_pcm_close(This->pcm);
 406         This->pcm = NULL;
 407         err = snd_pcm_open(&pcm, WOutDev[This->drv->wDevID].pcmname, SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
 408         if (err < 0)
 409         {
 410             /* **** */
 411             LeaveCriticalSection(&This->pcm_crst);
 412             WARN("Cannot open sound device: %s\n", snd_strerror(err));
 413             return DSERR_BUFFERLOST;
 414         }
 415     }
 416
 417     /* Set some defaults */
 418     snd_pcm_hw_params_any(pcm, hw_params);
 419     err = snd_pcm_hw_params_set_channels(pcm, hw_params, pwfx->nChannels);
 420     if (err < 0) { WARN("Could not set channels to %d\n", pwfx->nChannels); goto err; }
 421
 422     err = snd_pcm_hw_params_set_format(pcm, hw_params, format);
 423     if (err < 0) { WARN("Could not set format to %d bpp\n", pwfx->wBitsPerSample); goto err; }
 424
 425     /* Alsa's rate resampling is only used if the application specifically requests
 426      * a buffer at a certain frequency, else it is better to disable it due to unwanted
 427      * side effects, which may include: Less granular pointer, changing buffer sizes, etc
 428      */
 429 #if SND_LIB_VERSION >= 0x010009
 430     snd_pcm_hw_params_set_rate_resample(pcm, hw_params, 0 && forced);
 431 #endif
 432
 433     err = snd_pcm_hw_params_set_rate_near(pcm, hw_params, &rate, NULL);
 434     if (err < 0) { rate = pwfx->nSamplesPerSec; WARN("Could not set rate\n"); goto err; }
 435
 436     if (!ALSA_NearMatch(rate, pwfx->nSamplesPerSec))
 437     {
 438         WARN("Could not set sound rate to %d, but instead to %d\n", pwfx->nSamplesPerSec, rate);
 439         pwfx->nSamplesPerSec = rate;
 440         pwfx->nAvgBytesPerSec = rate * pwfx->nBlockAlign;
 441         /* Let DirectSound detect this */
 442     }
 443
 444     snd_pcm_hw_params_set_periods_integer(pcm, hw_params);
 445     snd_pcm_hw_params_set_buffer_time_near(pcm, hw_params, &buffer_time, NULL);
 446     buffer_time = 10000;
 447     snd_pcm_hw_params_set_period_time_near(pcm, hw_params, &buffer_time, NULL);
 448     err = snd_pcm_hw_params(pcm, hw_params);
 449     err = snd_pcm_sw_params(pcm, This->sw_params);
 450     snd_pcm_prepare(pcm);
 451
 452     err = snd_pcm_hw_params_get_period_size(hw_params, &psize, NULL);
 453     TRACE("Period size is: %lu\n", psize);
 454
 455     /* ALSA needs at least 3 buffers to work successfully */
 456     This->mmap_commitahead = 3 * psize;
 457     while (This->mmap_commitahead <= 512)
 458         This->mmap_commitahead += psize;
 459
 460     if (This->pcm)
 461     {
 462         snd_pcm_drop(This->pcm);
 463         snd_pcm_close(This->pcm);
 464     }
 465     This->pcm = pcm;
 466
 467     snd_pcm_prepare(This->pcm);
 468     DSDB_CreateMMAP(This);
 469
 470     /* **** */
 471     LeaveCriticalSection(&This->pcm_crst);
 472     return S_OK;
 473
 474     err:
 475     if (err < 0)
 476         WARN("Failed to apply changes: %s\n", snd_strerror(err));
 477
 478     if (!This->pcm)
 479         This->pcm = pcm;
 480     else
 481         snd_pcm_close(pcm);
 482
 483     if (This->pcm)
 484         snd_pcm_hw_params_current(This->pcm, This->hw_params);
 485
 486     /* **** */
 487     LeaveCriticalSection(&This->pcm_crst);
 488     return DSERR_BADFORMAT;
 489 }
 490
 491 static HRESULT WINAPI IDsDriverBufferImpl_SetFormat(PIDSDRIVERBUFFER iface, LPWAVEFORMATEX pwfx)
 492 {
 493     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
 494     HRESULT hr = S_OK;
 495
 496     TRACE("(%p, %p)\n", iface, pwfx);
 497
 498     hr = SetFormat(This, pwfx, TRUE);
 499
 500     if (hr == S_OK)
 501         /* Buffer size / Location changed, so tell dsound to recreate */
 502         return DSERR_BUFFERLOST;
 503     return hr;
 504 }
 505
 506 static HRESULT WINAPI IDsDriverBufferImpl_SetFrequency(PIDSDRIVERBUFFER iface, DWORD dwFreq)
 507 {
 508     /* IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface; */
 509     FIXME("(%p,%d): stub\n",iface,dwFreq);
 510     return S_OK;
 511 }
 512
 513 static HRESULT WINAPI IDsDriverBufferImpl_SetVolumePan(PIDSDRIVERBUFFER iface, PDSVOLUMEPAN pVolPan)
 514 {
 515     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
 516     FIXME("(%p,%p): stub\n",This,pVolPan);
 517     /* TODO: Bring volume control back */
 518     return DS_OK;
 519 }
 520
 521 static HRESULT WINAPI IDsDriverBufferImpl_SetPosition(PIDSDRIVERBUFFER iface, DWORD dwNewPos)
 522 {
 523     /* IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface; */
 524     /* I don't even think alsa allows this */
 525     FIXME("(%p,%d): stub\n",iface,dwNewPos);
 526     return DSERR_UNSUPPORTED;
 527 }
 528
 529 static HRESULT WINAPI IDsDriverBufferImpl_GetPosition(PIDSDRIVERBUFFER iface,
 530                                                       LPDWORD lpdwPlay, LPDWORD lpdwWrite)
 531 {
 532     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
 533     snd_pcm_uframes_t hw_pptr, hw_wptr;
 534     snd_pcm_state_t state;
 535
 536     /* **** */
 537     EnterCriticalSection(&This->pcm_crst);
 538
 539     if (!This->pcm)
 540     {
 541         FIXME("Bad pointer for pcm: %p\n", This->pcm);
 542         LeaveCriticalSection(&This->pcm_crst);
 543         return DSERR_GENERIC;
 544     }
 545
 546     if (!lpdwPlay && !lpdwWrite)
 547         CommitAll(This);
 548
 549     state = snd_pcm_state(This->pcm);
 550
 551     if (state != SND_PCM_STATE_PREPARED && state != SND_PCM_STATE_RUNNING)
 552     {
 553         CheckXRUN(This);
 554         state = snd_pcm_state(This->pcm);
 555     }
 556     if (state == SND_PCM_STATE_RUNNING)
 557     {
 558         snd_pcm_uframes_t used = This->mmap_buflen_frames - snd_pcm_avail_update(This->pcm);
 559
 560         if (This->mmap_pos > used)
 561             hw_pptr = This->mmap_pos - used;
 562         else
 563             hw_pptr = This->mmap_buflen_frames + This->mmap_pos - used;
 564         hw_pptr %= This->mmap_buflen_frames;
 565
 566         TRACE("At position: %ld (%ld) - Used %ld\n", hw_pptr, This->mmap_pos, used);
 567     }
 568     else hw_pptr = This->mmap_pos;
 569     hw_wptr = This->mmap_pos;
 570
 571     LeaveCriticalSection(&This->pcm_crst);
 572     /* **** */
 573
 574     if (lpdwPlay)
 575         *lpdwPlay = snd_pcm_frames_to_bytes(This->pcm, hw_pptr);
 576     if (lpdwWrite)
 577         *lpdwWrite = snd_pcm_frames_to_bytes(This->pcm, hw_wptr);
 578
 579     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);
 580     return DS_OK;
 581 }
 582
 583 static HRESULT WINAPI IDsDriverBufferImpl_Play(PIDSDRIVERBUFFER iface, DWORD dwRes1, DWORD dwRes2, DWORD dwFlags)
 584 {
 585     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
 586     TRACE("(%p,%x,%x,%x)\n",iface,dwRes1,dwRes2,dwFlags);
 587
 588     /* **** */
 589     EnterCriticalSection(&This->pcm_crst);
 590     snd_pcm_start(This->pcm);
 591     /* **** */
 592     LeaveCriticalSection(&This->pcm_crst);
 593     return DS_OK;
 594 }
 595
 596 static HRESULT WINAPI IDsDriverBufferImpl_Stop(PIDSDRIVERBUFFER iface)
 597 {
 598     const snd_pcm_channel_area_t *areas;
 599     snd_pcm_uframes_t avail;
 600     snd_pcm_format_t format;
 601     IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
 602     TRACE("(%p)\n",iface);
 603
 604     /* **** */
 605     EnterCriticalSection(&This->pcm_crst);
 606     avail = This->mmap_buflen_frames;
 607     snd_pcm_drop(This->pcm);
 608     snd_pcm_prepare(This->pcm);
 609     avail = snd_pcm_avail_update(This->pcm);
 610     snd_pcm_mmap_begin(This->pcm, &areas, &This->mmap_pos, &avail);
 611     snd_pcm_hw_params_get_format(This->hw_params, &format);
 612     snd_pcm_format_set_silence(format, areas->addr, This->mmap_buflen_frames);
 613     snd_pcm_mmap_commit(This->pcm, This->mmap_pos, 0);
 614
 615     /* **** */
 616     LeaveCriticalSection(&This->pcm_crst);
 617     return DS_OK;
 618 }
 619
 620 static const IDsDriverBufferVtbl dsdbvt =
 621 {
 622     IDsDriverBufferImpl_QueryInterface,
 623     IDsDriverBufferImpl_AddRef,
 624     IDsDriverBufferImpl_Release,
 625     IDsDriverBufferImpl_Lock,
 626     IDsDriverBufferImpl_Unlock,
 627     IDsDriverBufferImpl_SetFormat,
 628     IDsDriverBufferImpl_SetFrequency,
 629     IDsDriverBufferImpl_SetVolumePan,
 630     IDsDriverBufferImpl_SetPosition,
 631     IDsDriverBufferImpl_GetPosition,
 632     IDsDriverBufferImpl_Play,
 633     IDsDriverBufferImpl_Stop
 634 };
 635
 636 static HRESULT WINAPI IDsDriverImpl_QueryInterface(PIDSDRIVER iface, REFIID riid, LPVOID *ppobj)
 637 {
 638     /* IDsDriverImpl *This = (IDsDriverImpl *)iface; */
 639     FIXME("(%p): stub!\n",iface);
 640     return DSERR_UNSUPPORTED;
 641 }
 642
 643 static ULONG WINAPI IDsDriverImpl_AddRef(PIDSDRIVER iface)
 644 {
 645     IDsDriverImpl *This = (IDsDriverImpl *)iface;
 646     ULONG refCount = InterlockedIncrement(&This->ref);
 647
 648     TRACE("(%p)->(ref before=%u)\n",This, refCount - 1);
 649
 650     return refCount;
 651 }
 652
 653 static ULONG WINAPI IDsDriverImpl_Release(PIDSDRIVER iface)
 654 {
 655     IDsDriverImpl *This = (IDsDriverImpl *)iface;
 656     ULONG refCount = InterlockedDecrement(&This->ref);
 657
 658     TRACE("(%p)->(ref before=%u)\n",This, refCount + 1);
 659
 660     if (refCount)
 661         return refCount;
 662
 663     HeapFree(GetProcessHeap(), 0, This);
 664     return 0;
 665 }
 666
 667 static HRESULT WINAPI IDsDriverImpl_GetDriverDesc(PIDSDRIVER iface, PDSDRIVERDESC pDesc)
 668 {
 669     IDsDriverImpl *This = (IDsDriverImpl *)iface;
 670     TRACE("(%p,%p)\n",iface,pDesc);
 671     memcpy(pDesc, &(WOutDev[This->wDevID].ds_desc), sizeof(DSDRIVERDESC));
 672     pDesc->dwFlags              = DSDDESC_DONTNEEDSECONDARYLOCK | DSDDESC_DONTNEEDWRITELEAD;
 673     pDesc->dnDevNode            = WOutDev[This->wDevID].waveDesc.dnDevNode;
 674     pDesc->wVxdId               = 0;
 675     pDesc->wReserved            = 0;
 676     pDesc->ulDeviceNum          = This->wDevID;
 677     pDesc->dwHeapType           = DSDHEAP_NOHEAP;
 678     pDesc->pvDirectDrawHeap     = NULL;
 679     pDesc->dwMemStartAddress    = 0xDEAD0000;
 680     pDesc->dwMemEndAddress      = 0xDEAF0000;
 681     pDesc->dwMemAllocExtra      = 0;
 682     pDesc->pvReserved1          = NULL;
 683     pDesc->pvReserved2          = NULL;
 684     return DS_OK;
 685 }
 686
 687 static HRESULT WINAPI IDsDriverImpl_Open(PIDSDRIVER iface)
 688 {
 689     HRESULT hr = S_OK;
 690     IDsDriverImpl *This = (IDsDriverImpl *)iface;
 691     int err=0;
 692     snd_pcm_t *pcm = NULL;
 693     snd_pcm_hw_params_t *hw_params;
 694
 695     /* While this is not really needed, it is a good idea to do this,
 696      * to see if sound can be initialized */
 697
 698     hw_params = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, snd_pcm_hw_params_sizeof());
 699
 700     if (!hw_params)
 701     {
 702         hr = DSERR_OUTOFMEMORY;
 703         goto unalloc;
 704     }
 705
 706     err = snd_pcm_open(&pcm, WOutDev[This->wDevID].pcmname, SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
 707     if (err < 0) goto err;
 708     err = snd_pcm_hw_params_any(pcm, hw_params);
 709     if (err < 0) goto err;
 710     err = snd_pcm_hw_params_set_access (pcm, hw_params, SND_PCM_ACCESS_MMAP_INTERLEAVED);
 711     if (err < 0) goto err;
 712
 713     TRACE("Success\n");
 714     snd_pcm_close(pcm);
 715     goto unalloc;
 716
 717     err:
 718     hr = DSERR_GENERIC;
 719     FIXME("Failed to open device: %s\n", snd_strerror(err));
 720     if (pcm)
 721         snd_pcm_close(pcm);
 722     unalloc:
 723     HeapFree(GetProcessHeap(), 0, hw_params);
 724     if (hr != S_OK)
 725         WARN("--> %08x\n", hr);
 726     return hr;
 727 }
 728
 729 static HRESULT WINAPI IDsDriverImpl_Close(PIDSDRIVER iface)
 730 {
 731     IDsDriverImpl *This = (IDsDriverImpl *)iface;
 732     TRACE("(%p) stub, harmless\n",This);
 733     return DS_OK;
 734 }
 735
 736 static HRESULT WINAPI IDsDriverImpl_GetCaps(PIDSDRIVER iface, PDSDRIVERCAPS pCaps)
 737 {
 738     IDsDriverImpl *This = (IDsDriverImpl *)iface;
 739     TRACE("(%p,%p)\n",iface,pCaps);
 740     memcpy(pCaps, &(WOutDev[This->wDevID].ds_caps), sizeof(DSDRIVERCAPS));
 741     return DS_OK;
 742 }
 743
 744 static HRESULT WINAPI IDsDriverImpl_CreateSoundBuffer(PIDSDRIVER iface,
 745                                                       LPWAVEFORMATEX pwfx,
 746                                                       DWORD dwFlags, DWORD dwCardAddress,
 747                                                       LPDWORD pdwcbBufferSize,
 748                                                       LPBYTE *ppbBuffer,
 749                                                       LPVOID *ppvObj)
 750 {
 751     IDsDriverImpl *This = (IDsDriverImpl *)iface;
 752     IDsDriverBufferImpl** ippdsdb = (IDsDriverBufferImpl**)ppvObj;
 753     HRESULT err;
 754
 755     TRACE("(%p,%p,%x,%x)\n",iface,pwfx,dwFlags,dwCardAddress);
 756     /* we only support primary buffers... for now */
 757     if (!(dwFlags & DSBCAPS_PRIMARYBUFFER))
 758         return DSERR_UNSUPPORTED;
 759     if (This->primary)
 760         return DSERR_ALLOCATED;
 761
 762     *ippdsdb = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(IDsDriverBufferImpl));
 763     if (*ippdsdb == NULL)
 764         return DSERR_OUTOFMEMORY;
 765
 766     (*ippdsdb)->hw_params = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, snd_pcm_hw_params_sizeof());
 767     (*ippdsdb)->sw_params = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, snd_pcm_sw_params_sizeof());
 768     if (!(*ippdsdb)->hw_params || !(*ippdsdb)->sw_params)
 769     {
 770         HeapFree(GetProcessHeap(), 0, (*ippdsdb)->sw_params);
 771         HeapFree(GetProcessHeap(), 0, (*ippdsdb)->hw_params);
 772         return DSERR_OUTOFMEMORY;
 773     }
 774     (*ippdsdb)->lpVtbl  = &dsdbvt;
 775     (*ippdsdb)->ref     = 1;
 776     (*ippdsdb)->drv     = This;
 777     InitializeCriticalSection(&(*ippdsdb)->pcm_crst);
 778     (*ippdsdb)->pcm_crst.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": ALSA_DSOUTPUT.pcm_crst");
 779
 780     /* SetFormat has to re-initialize pcm here anyway */
 781     err = SetFormat(*ippdsdb, pwfx, FALSE);
 782     if (FAILED(err))
 783     {
 784         WARN("Error occurred: %08x\n", err);
 785         goto err;
 786     }
 787
 788     if (dwFlags & DSBCAPS_PRIMARYBUFFER)
 789         This->primary = *ippdsdb;
 790
 791     *pdwcbBufferSize = (*ippdsdb)->mmap_buflen_bytes;
 792     *ppbBuffer = (*ippdsdb)->mmap_buffer;
 793
 794     /* buffer is ready to go */
 795     TRACE("buffer created at %p\n", *ippdsdb);
 796     return err;
 797
 798     err:
 799     HeapFree(GetProcessHeap(), 0, (*ippdsdb)->sw_params);
 800     HeapFree(GetProcessHeap(), 0, (*ippdsdb)->hw_params);
 801     HeapFree(GetProcessHeap(), 0, *ippdsdb);
 802     *ippdsdb = NULL;
 803     return err;
 804 }
 805
 806 static HRESULT WINAPI IDsDriverImpl_DuplicateSoundBuffer(PIDSDRIVER iface,
 807                                                          PIDSDRIVERBUFFER pBuffer,
 808                                                          LPVOID *ppvObj)
 809 {
 810     IDsDriverImpl *This = (IDsDriverImpl *)iface;
 811     FIXME("(%p,%p): stub\n",This,pBuffer);
 812     return DSERR_INVALIDCALL;
 813 }
 814
 815 static const IDsDriverVtbl dsdvt =
 816 {
 817     IDsDriverImpl_QueryInterface,
 818     IDsDriverImpl_AddRef,
 819     IDsDriverImpl_Release,
 820     IDsDriverImpl_GetDriverDesc,
 821     IDsDriverImpl_Open,
 822     IDsDriverImpl_Close,
 823     IDsDriverImpl_GetCaps,
 824     IDsDriverImpl_CreateSoundBuffer,
 825     IDsDriverImpl_DuplicateSoundBuffer
 826 };
 827
 828 DWORD wodDsCreate(UINT wDevID, PIDSDRIVER* drv)
 829 {
 830     IDsDriverImpl** idrv = (IDsDriverImpl**)drv;
 831
 832     TRACE("driver created\n");
 833
 834     /* the HAL isn't much better than the HEL if we can't do mmap() */
 835     if (!(WOutDev[wDevID].outcaps.dwSupport & WAVECAPS_DIRECTSOUND))
 836     {
 837         WARN("MMAP not supported for this device, falling back to waveout, should be harmless\n");
 838         return MMSYSERR_NOTSUPPORTED;
 839     }
 840
 841     *idrv = HeapAlloc(GetProcessHeap(),0,sizeof(IDsDriverImpl));
 842     if (!*idrv)
 843         return MMSYSERR_NOMEM;
 844     (*idrv)->lpVtbl     = &dsdvt;
 845     (*idrv)->ref        = 1;
 846
 847     (*idrv)->wDevID     = wDevID;
 848     (*idrv)->primary    = NULL;
 849     return MMSYSERR_NOERROR;
 850 }
 851
 852 DWORD wodDsDesc(UINT wDevID, PDSDRIVERDESC desc)
 853 {
 854     memcpy(desc, &(WOutDev[wDevID].ds_desc), sizeof(DSDRIVERDESC));
 855     return MMSYSERR_NOERROR;
 856 }
 857
 858 #endif /* HAVE_ALSA */