audio/dsoundaudio.c

   1 /*
   2  * QEMU DirectSound audio driver
   3  *
   4  * Copyright (c) 2005 Vassili Karpov (malc)
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24
  25 /*
  26  * SEAL 1.07 by Carlos 'pel' Hasan was used as documentation
  27  */
  28
  29 #include "qemu-common.h"
  30 #include "audio.h"
  31
  32 #define AUDIO_CAP "dsound"
  33 #include "audio_int.h"
  34
  35 #include <windows.h>
  36 #include <mmsystem.h>
  37 #include <objbase.h>
  38 #include <dsound.h>
  39
  40 /* #define DEBUG_DSOUND */
  41
  42 static struct {
  43     int lock_retries;
  44     int restore_retries;
  45     int getstatus_retries;
  46     int set_primary;
  47     int bufsize_in;
  48     int bufsize_out;
  49     struct audsettings settings;
  50     int latency_millis;
  51 } conf = {
  52     .lock_retries       = 1,
  53     .restore_retries    = 1,
  54     .getstatus_retries  = 1,
  55     .set_primary        = 0,
  56     .bufsize_in         = 16384,
  57     .bufsize_out        = 16384,
  58     .settings.freq      = 44100,
  59     .settings.nchannels = 2,
  60     .settings.fmt       = AUD_FMT_S16,
  61     .latency_millis     = 10
  62 };
  63
  64 typedef struct {
  65     LPDIRECTSOUND dsound;
  66     LPDIRECTSOUNDCAPTURE dsound_capture;
  67     LPDIRECTSOUNDBUFFER dsound_primary_buffer;
  68     struct audsettings settings;
  69 } dsound;
  70
  71 static dsound glob_dsound;
  72
  73 typedef struct {
  74     HWVoiceOut hw;
  75     LPDIRECTSOUNDBUFFER dsound_buffer;
  76     DWORD old_pos;
  77     int first_time;
  78 #ifdef DEBUG_DSOUND
  79     DWORD old_ppos;
  80     DWORD played;
  81     DWORD mixed;
  82 #endif
  83 } DSoundVoiceOut;
  84
  85 typedef struct {
  86     HWVoiceIn hw;
  87     int first_time;
  88     LPDIRECTSOUNDCAPTUREBUFFER dsound_capture_buffer;
  89 } DSoundVoiceIn;
  90
  91 static void dsound_log_hresult (HRESULT hr)
  92 {
  93     const char *str = "BUG";
  94
  95     switch (hr) {
  96     case DS_OK:
  97         str = "The method succeeded";
  98         break;
  99 #ifdef DS_NO_VIRTUALIZATION
 100     case DS_NO_VIRTUALIZATION:
 101         str = "The buffer was created, but another 3D algorithm was substituted";
 102         break;
 103 #endif
 104 #ifdef DS_INCOMPLETE
 105     case DS_INCOMPLETE:
 106         str = "The method succeeded, but not all the optional effects were obtained";
 107         break;
 108 #endif
 109 #ifdef DSERR_ACCESSDENIED
 110     case DSERR_ACCESSDENIED:
 111         str = "The request failed because access was denied";
 112         break;
 113 #endif
 114 #ifdef DSERR_ALLOCATED
 115     case DSERR_ALLOCATED:
 116         str = "The request failed because resources, such as a priority level, were already in use by another caller";
 117         break;
 118 #endif
 119 #ifdef DSERR_ALREADYINITIALIZED
 120     case DSERR_ALREADYINITIALIZED:
 121         str = "The object is already initialized";
 122         break;
 123 #endif
 124 #ifdef DSERR_BADFORMAT
 125     case DSERR_BADFORMAT:
 126         str = "The specified wave format is not supported";
 127         break;
 128 #endif
 129 #ifdef DSERR_BADSENDBUFFERGUID
 130     case DSERR_BADSENDBUFFERGUID:
 131         str = "The GUID specified in an audiopath file does not match a valid mix-in buffer";
 132         break;
 133 #endif
 134 #ifdef DSERR_BUFFERLOST
 135     case DSERR_BUFFERLOST:
 136         str = "The buffer memory has been lost and must be restored";
 137         break;
 138 #endif
 139 #ifdef DSERR_BUFFERTOOSMALL
 140     case DSERR_BUFFERTOOSMALL:
 141         str = "The buffer size is not great enough to enable effects processing";
 142         break;
 143 #endif
 144 #ifdef DSERR_CONTROLUNAVAIL
 145     case DSERR_CONTROLUNAVAIL:
 146         str = "The buffer control (volume, pan, and so on) requested by the caller is not available. Controls must be specified when the buffer is created, using the dwFlags member of DSBUFFERDESC";
 147         break;
 148 #endif
 149 #ifdef DSERR_DS8_REQUIRED
 150     case DSERR_DS8_REQUIRED:
 151         str = "A DirectSound object of class CLSID_DirectSound8 or later is required for the requested functionality. For more information, see IDirectSound8 Interface";
 152         break;
 153 #endif
 154 #ifdef DSERR_FXUNAVAILABLE
 155     case DSERR_FXUNAVAILABLE:
 156         str = "The effects requested could not be found on the system, or they are in the wrong order or in the wrong location; for example, an effect expected in hardware was found in software";
 157         break;
 158 #endif
 159 #ifdef DSERR_GENERIC
 160     case DSERR_GENERIC :
 161         str = "An undetermined error occurred inside the DirectSound subsystem";
 162         break;
 163 #endif
 164 #ifdef DSERR_INVALIDCALL
 165     case DSERR_INVALIDCALL:
 166         str = "This function is not valid for the current state of this object";
 167         break;
 168 #endif
 169 #ifdef DSERR_INVALIDPARAM
 170     case DSERR_INVALIDPARAM:
 171         str = "An invalid parameter was passed to the returning function";
 172         break;
 173 #endif
 174 #ifdef DSERR_NOAGGREGATION
 175     case DSERR_NOAGGREGATION:
 176         str = "The object does not support aggregation";
 177         break;
 178 #endif
 179 #ifdef DSERR_NODRIVER
 180     case DSERR_NODRIVER:
 181         str = "No sound driver is available for use, or the given GUID is not a valid DirectSound device ID";
 182         break;
 183 #endif
 184 #ifdef DSERR_NOINTERFACE
 185     case DSERR_NOINTERFACE:
 186         str = "The requested COM interface is not available";
 187         break;
 188 #endif
 189 #ifdef DSERR_OBJECTNOTFOUND
 190     case DSERR_OBJECTNOTFOUND:
 191         str = "The requested object was not found";
 192         break;
 193 #endif
 194 #ifdef DSERR_OTHERAPPHASPRIO
 195     case DSERR_OTHERAPPHASPRIO:
 196         str = "Another application has a higher priority level, preventing this call from succeeding";
 197         break;
 198 #endif
 199 #ifdef DSERR_OUTOFMEMORY
 200     case DSERR_OUTOFMEMORY:
 201         str = "The DirectSound subsystem could not allocate sufficient memory to complete the caller's request";
 202         break;
 203 #endif
 204 #ifdef DSERR_PRIOLEVELNEEDED
 205     case DSERR_PRIOLEVELNEEDED:
 206         str = "A cooperative level of DSSCL_PRIORITY or higher is required";
 207         break;
 208 #endif
 209 #ifdef DSERR_SENDLOOP
 210     case DSERR_SENDLOOP:
 211         str = "A circular loop of send effects was detected";
 212         break;
 213 #endif
 214 #ifdef DSERR_UNINITIALIZED
 215     case DSERR_UNINITIALIZED:
 216         str = "The Initialize method has not been called or has not been called successfully before other methods were called";
 217         break;
 218 #endif
 219 #ifdef DSERR_UNSUPPORTED
 220     case DSERR_UNSUPPORTED:
 221         str = "The function called is not supported at this time";
 222         break;
 223 #endif
 224     default:
 225         AUD_log (AUDIO_CAP, "Reason: Unknown (HRESULT %#lx)\n", hr);
 226         return;
 227     }
 228
 229     AUD_log (AUDIO_CAP, "Reason: %s\n", str);
 230 }
 231
 232 static void GCC_FMT_ATTR (2, 3) dsound_logerr (
 233     HRESULT hr,
 234     const char *fmt,
 235     ...
 236     )
 237 {
 238     va_list ap;
 239
 240     va_start (ap, fmt);
 241     AUD_vlog (AUDIO_CAP, fmt, ap);
 242     va_end (ap);
 243
 244     dsound_log_hresult (hr);
 245 }
 246
 247 static void GCC_FMT_ATTR (3, 4) dsound_logerr2 (
 248     HRESULT hr,
 249     const char *typ,
 250     const char *fmt,
 251     ...
 252     )
 253 {
 254     va_list ap;
 255
 256     AUD_log (AUDIO_CAP, "Could not initialize %s\n", typ);
 257     va_start (ap, fmt);
 258     AUD_vlog (AUDIO_CAP, fmt, ap);
 259     va_end (ap);
 260
 261     dsound_log_hresult (hr);
 262 }
 263
 264 static DWORD millis_to_bytes (struct audio_pcm_info *info, DWORD millis)
 265 {
 266     return (millis * info->bytes_per_second) / 1000;
 267 }
 268
 269 #ifdef DEBUG_DSOUND
 270 static void print_wave_format (WAVEFORMATEX *wfx)
 271 {
 272     dolog ("tag             = %d\n", wfx->wFormatTag);
 273     dolog ("nChannels       = %d\n", wfx->nChannels);
 274     dolog ("nSamplesPerSec  = %ld\n", wfx->nSamplesPerSec);
 275     dolog ("nAvgBytesPerSec = %ld\n", wfx->nAvgBytesPerSec);
 276     dolog ("nBlockAlign     = %d\n", wfx->nBlockAlign);
 277     dolog ("wBitsPerSample  = %d\n", wfx->wBitsPerSample);
 278     dolog ("cbSize          = %d\n", wfx->cbSize);
 279 }
 280 #endif
 281
 282 static int dsound_restore_out (LPDIRECTSOUNDBUFFER dsb)
 283 {
 284     HRESULT hr;
 285     int i;
 286
 287     for (i = 0; i < conf.restore_retries; ++i) {
 288         hr = IDirectSoundBuffer_Restore (dsb);
 289
 290         switch (hr) {
 291         case DS_OK:
 292             return 0;
 293
 294         case DSERR_BUFFERLOST:
 295             continue;
 296
 297         default:
 298             dsound_logerr (hr, "Could not restore playback buffer\n");
 299             return -1;
 300         }
 301     }
 302
 303     dolog ("%d attempts to restore playback buffer failed\n", i);
 304     return -1;
 305 }
 306
 307 static int waveformat_from_audio_settings (WAVEFORMATEX *wfx,
 308                                            struct audsettings *as)
 309 {
 310     memset (wfx, 0, sizeof (*wfx));
 311
 312     wfx->wFormatTag = WAVE_FORMAT_PCM;
 313     wfx->nChannels = as->nchannels;
 314     wfx->nSamplesPerSec = as->freq;
 315     wfx->nAvgBytesPerSec = as->freq << (as->nchannels == 2);
 316     wfx->nBlockAlign = 1 << (as->nchannels == 2);
 317     wfx->cbSize = 0;
 318
 319     switch (as->fmt) {
 320     case AUD_FMT_S8:
 321     case AUD_FMT_U8:
 322         wfx->wBitsPerSample = 8;
 323         break;
 324
 325     case AUD_FMT_S16:
 326     case AUD_FMT_U16:
 327         wfx->wBitsPerSample = 16;
 328         wfx->nAvgBytesPerSec <<= 1;
 329         wfx->nBlockAlign <<= 1;
 330         break;
 331
 332     case AUD_FMT_S32:
 333     case AUD_FMT_U32:
 334         wfx->wBitsPerSample = 32;
 335         wfx->nAvgBytesPerSec <<= 2;
 336         wfx->nBlockAlign <<= 2;
 337         break;
 338
 339     default:
 340         dolog ("Internal logic error: Bad audio format %d\n", as->freq);
 341         return -1;
 342     }
 343
 344     return 0;
 345 }
 346
 347 static int waveformat_to_audio_settings (WAVEFORMATEX *wfx,
 348                                          struct audsettings *as)
 349 {
 350     if (wfx->wFormatTag != WAVE_FORMAT_PCM) {
 351         dolog ("Invalid wave format, tag is not PCM, but %d\n",
 352                wfx->wFormatTag);
 353         return -1;
 354     }
 355
 356     if (!wfx->nSamplesPerSec) {
 357         dolog ("Invalid wave format, frequency is zero\n");
 358         return -1;
 359     }
 360     as->freq = wfx->nSamplesPerSec;
 361
 362     switch (wfx->nChannels) {
 363     case 1:
 364         as->nchannels = 1;
 365         break;
 366
 367     case 2:
 368         as->nchannels = 2;
 369         break;
 370
 371     default:
 372         dolog (
 373             "Invalid wave format, number of channels is not 1 or 2, but %d\n",
 374             wfx->nChannels
 375             );
 376         return -1;
 377     }
 378
 379     switch (wfx->wBitsPerSample) {
 380     case 8:
 381         as->fmt = AUD_FMT_U8;
 382         break;
 383
 384     case 16:
 385         as->fmt = AUD_FMT_S16;
 386         break;
 387
 388     case 32:
 389         as->fmt = AUD_FMT_S32;
 390         break;
 391
 392     default:
 393         dolog ("Invalid wave format, bits per sample is not "
 394                "8, 16 or 32, but %d\n",
 395                wfx->wBitsPerSample);
 396         return -1;
 397     }
 398
 399     return 0;
 400 }
 401
 402 #include "dsound_template.h"
 403 #define DSBTYPE_IN
 404 #include "dsound_template.h"
 405 #undef DSBTYPE_IN
 406
 407 static int dsound_get_status_out (LPDIRECTSOUNDBUFFER dsb, DWORD *statusp)
 408 {
 409     HRESULT hr;
 410     int i;
 411
 412     for (i = 0; i < conf.getstatus_retries; ++i) {
 413         hr = IDirectSoundBuffer_GetStatus (dsb, statusp);
 414         if (FAILED (hr)) {
 415             dsound_logerr (hr, "Could not get playback buffer status\n");
 416             return -1;
 417         }
 418
 419         if (*statusp & DSERR_BUFFERLOST) {
 420             if (dsound_restore_out (dsb)) {
 421                 return -1;
 422             }
 423             continue;
 424         }
 425         break;
 426     }
 427
 428     return 0;
 429 }
 430
 431 static int dsound_get_status_in (LPDIRECTSOUNDCAPTUREBUFFER dscb,
 432                                  DWORD *statusp)
 433 {
 434     HRESULT hr;
 435
 436     hr = IDirectSoundCaptureBuffer_GetStatus (dscb, statusp);
 437     if (FAILED (hr)) {
 438         dsound_logerr (hr, "Could not get capture buffer status\n");
 439         return -1;
 440     }
 441
 442     return 0;
 443 }
 444
 445 static void dsound_write_sample (HWVoiceOut *hw, uint8_t *dst, int dst_len)
 446 {
 447     int src_len1 = dst_len;
 448     int src_len2 = 0;
 449     int pos = hw->rpos + dst_len;
 450     struct st_sample *src1 = hw->mix_buf + hw->rpos;
 451     struct st_sample *src2 = NULL;
 452
 453     if (pos > hw->samples) {
 454         src_len1 = hw->samples - hw->rpos;
 455         src2 = hw->mix_buf;
 456         src_len2 = dst_len - src_len1;
 457         pos = src_len2;
 458     }
 459
 460     if (src_len1) {
 461         hw->clip (dst, src1, src_len1);
 462     }
 463
 464     if (src_len2) {
 465         dst = advance (dst, src_len1 << hw->info.shift);
 466         hw->clip (dst, src2, src_len2);
 467     }
 468
 469     hw->rpos = pos % hw->samples;
 470 }
 471
 472 static void dsound_clear_sample (HWVoiceOut *hw, LPDIRECTSOUNDBUFFER dsb)
 473 {
 474     int err;
 475     LPVOID p1, p2;
 476     DWORD blen1, blen2, len1, len2;
 477
 478     err = dsound_lock_out (
 479         dsb,
 480         &hw->info,
 481         0,
 482         hw->samples << hw->info.shift,
 483         &p1, &p2,
 484         &blen1, &blen2,
 485         1
 486         );
 487     if (err) {
 488         return;
 489     }
 490
 491     len1 = blen1 >> hw->info.shift;
 492     len2 = blen2 >> hw->info.shift;
 493
 494 #ifdef DEBUG_DSOUND
 495     dolog ("clear %p,%ld,%ld %p,%ld,%ld\n",
 496            p1, blen1, len1,
 497            p2, blen2, len2);
 498 #endif
 499
 500     if (p1 && len1) {
 501         audio_pcm_info_clear_buf (&hw->info, p1, len1);
 502     }
 503
 504     if (p2 && len2) {
 505         audio_pcm_info_clear_buf (&hw->info, p2, len2);
 506     }
 507
 508     dsound_unlock_out (dsb, p1, p2, blen1, blen2);
 509 }
 510
 511 static void dsound_close (dsound *s)
 512 {
 513     HRESULT hr;
 514
 515     if (s->dsound_primary_buffer) {
 516         hr = IDirectSoundBuffer_Release (s->dsound_primary_buffer);
 517         if (FAILED (hr)) {
 518             dsound_logerr (hr, "Could not release primary buffer\n");
 519         }
 520         s->dsound_primary_buffer = NULL;
 521     }
 522 }
 523
 524 static int dsound_open (dsound *s)
 525 {
 526     int err;
 527     HRESULT hr;
 528     WAVEFORMATEX wfx;
 529     DSBUFFERDESC dsbd;
 530     HWND hwnd;
 531
 532     hwnd = GetForegroundWindow ();
 533     hr = IDirectSound_SetCooperativeLevel (
 534         s->dsound,
 535         hwnd,
 536         DSSCL_PRIORITY
 537         );
 538
 539     if (FAILED (hr)) {
 540         dsound_logerr (hr, "Could not set cooperative level for window %p\n",
 541                        hwnd);
 542         return -1;
 543     }
 544
 545     if (!conf.set_primary) {
 546         return 0;
 547     }
 548
 549     err = waveformat_from_audio_settings (&wfx, &conf.settings);
 550     if (err) {
 551         return -1;
 552     }
 553
 554     memset (&dsbd, 0, sizeof (dsbd));
 555     dsbd.dwSize = sizeof (dsbd);
 556     dsbd.dwFlags = DSBCAPS_PRIMARYBUFFER;
 557     dsbd.dwBufferBytes = 0;
 558     dsbd.lpwfxFormat = NULL;
 559
 560     hr = IDirectSound_CreateSoundBuffer (
 561         s->dsound,
 562         &dsbd,
 563         &s->dsound_primary_buffer,
 564         NULL
 565         );
 566     if (FAILED (hr)) {
 567         dsound_logerr (hr, "Could not create primary playback buffer\n");
 568         return -1;
 569     }
 570
 571     hr = IDirectSoundBuffer_SetFormat (s->dsound_primary_buffer, &wfx);
 572     if (FAILED (hr)) {
 573         dsound_logerr (hr, "Could not set primary playback buffer format\n");
 574     }
 575
 576     hr = IDirectSoundBuffer_GetFormat (
 577         s->dsound_primary_buffer,
 578         &wfx,
 579         sizeof (wfx),
 580         NULL
 581         );
 582     if (FAILED (hr)) {
 583         dsound_logerr (hr, "Could not get primary playback buffer format\n");
 584         goto fail0;
 585     }
 586
 587 #ifdef DEBUG_DSOUND
 588     dolog ("Primary\n");
 589     print_wave_format (&wfx);
 590 #endif
 591
 592     err = waveformat_to_audio_settings (&wfx, &s->settings);
 593     if (err) {
 594         goto fail0;
 595     }
 596
 597     return 0;
 598
 599  fail0:
 600     dsound_close (s);
 601     return -1;
 602 }
 603
 604 static int dsound_ctl_out (HWVoiceOut *hw, int cmd, ...)
 605 {
 606     HRESULT hr;
 607     DWORD status;
 608     DSoundVoiceOut *ds = (DSoundVoiceOut *) hw;
 609     LPDIRECTSOUNDBUFFER dsb = ds->dsound_buffer;
 610
 611     if (!dsb) {
 612         dolog ("Attempt to control voice without a buffer\n");
 613         return 0;
 614     }
 615
 616     switch (cmd) {
 617     case VOICE_ENABLE:
 618         if (dsound_get_status_out (dsb, &status)) {
 619             return -1;
 620         }
 621
 622         if (status & DSBSTATUS_PLAYING) {
 623             dolog ("warning: Voice is already playing\n");
 624             return 0;
 625         }
 626
 627         dsound_clear_sample (hw, dsb);
 628
 629         hr = IDirectSoundBuffer_Play (dsb, 0, 0, DSBPLAY_LOOPING);
 630         if (FAILED (hr)) {
 631             dsound_logerr (hr, "Could not start playing buffer\n");
 632             return -1;
 633         }
 634         break;
 635
 636     case VOICE_DISABLE:
 637         if (dsound_get_status_out (dsb, &status)) {
 638             return -1;
 639         }
 640
 641         if (status & DSBSTATUS_PLAYING) {
 642             hr = IDirectSoundBuffer_Stop (dsb);
 643             if (FAILED (hr)) {
 644                 dsound_logerr (hr, "Could not stop playing buffer\n");
 645                 return -1;
 646             }
 647         }
 648         else {
 649             dolog ("warning: Voice is not playing\n");
 650         }
 651         break;
 652     }
 653     return 0;
 654 }
 655
 656 static int dsound_write (SWVoiceOut *sw, void *buf, int len)
 657 {
 658     return audio_pcm_sw_write (sw, buf, len);
 659 }
 660
 661 static int dsound_run_out (HWVoiceOut *hw, int live)
 662 {
 663     int err;
 664     HRESULT hr;
 665     DSoundVoiceOut *ds = (DSoundVoiceOut *) hw;
 666     LPDIRECTSOUNDBUFFER dsb = ds->dsound_buffer;
 667     int len, hwshift;
 668     DWORD blen1, blen2;
 669     DWORD len1, len2;
 670     DWORD decr;
 671     DWORD wpos, ppos, old_pos;
 672     LPVOID p1, p2;
 673     int bufsize;
 674
 675     if (!dsb) {
 676         dolog ("Attempt to run empty with playback buffer\n");
 677         return 0;
 678     }
 679
 680     hwshift = hw->info.shift;
 681     bufsize = hw->samples << hwshift;
 682
 683     hr = IDirectSoundBuffer_GetCurrentPosition (
 684         dsb,
 685         &ppos,
 686         ds->first_time ? &wpos : NULL
 687         );
 688     if (FAILED (hr)) {
 689         dsound_logerr (hr, "Could not get playback buffer position\n");
 690         return 0;
 691     }
 692
 693     len = live << hwshift;
 694
 695     if (ds->first_time) {
 696         if (conf.latency_millis) {
 697             DWORD cur_blat;
 698
 699             cur_blat = audio_ring_dist (wpos, ppos, bufsize);
 700             ds->first_time = 0;
 701             old_pos = wpos;
 702             old_pos +=
 703                 millis_to_bytes (&hw->info, conf.latency_millis) - cur_blat;
 704             old_pos %= bufsize;
 705             old_pos &= ~hw->info.align;
 706         }
 707         else {
 708             old_pos = wpos;
 709         }
 710 #ifdef DEBUG_DSOUND
 711         ds->played = 0;
 712         ds->mixed = 0;
 713 #endif
 714     }
 715     else {
 716         if (ds->old_pos == ppos) {
 717 #ifdef DEBUG_DSOUND
 718             dolog ("old_pos == ppos\n");
 719 #endif
 720             return 0;
 721         }
 722
 723 #ifdef DEBUG_DSOUND
 724         ds->played += audio_ring_dist (ds->old_pos, ppos, hw->bufsize);
 725 #endif
 726         old_pos = ds->old_pos;
 727     }
 728
 729     if ((old_pos < ppos) && ((old_pos + len) > ppos)) {
 730         len = ppos - old_pos;
 731     }
 732     else {
 733         if ((old_pos > ppos) && ((old_pos + len) > (ppos + bufsize))) {
 734             len = bufsize - old_pos + ppos;
 735         }
 736     }
 737
 738     if (audio_bug (AUDIO_FUNC, len < 0 || len > bufsize)) {
 739         dolog ("len=%d bufsize=%d old_pos=%ld ppos=%ld\n",
 740                len, bufsize, old_pos, ppos);
 741         return 0;
 742     }
 743
 744     len &= ~hw->info.align;
 745     if (!len) {
 746         return 0;
 747     }
 748
 749 #ifdef DEBUG_DSOUND
 750     ds->old_ppos = ppos;
 751 #endif
 752     err = dsound_lock_out (
 753         dsb,
 754         &hw->info,
 755         old_pos,
 756         len,
 757         &p1, &p2,
 758         &blen1, &blen2,
 759         0
 760         );
 761     if (err) {
 762         return 0;
 763     }
 764
 765     len1 = blen1 >> hwshift;
 766     len2 = blen2 >> hwshift;
 767     decr = len1 + len2;
 768
 769     if (p1 && len1) {
 770         dsound_write_sample (hw, p1, len1);
 771     }
 772
 773     if (p2 && len2) {
 774         dsound_write_sample (hw, p2, len2);
 775     }
 776
 777     dsound_unlock_out (dsb, p1, p2, blen1, blen2);
 778     ds->old_pos = (old_pos + (decr << hwshift)) % bufsize;
 779
 780 #ifdef DEBUG_DSOUND
 781     ds->mixed += decr << hwshift;
 782
 783     dolog ("played %lu mixed %lu diff %ld sec %f\n",
 784            ds->played,
 785            ds->mixed,
 786            ds->mixed - ds->played,
 787            abs (ds->mixed - ds->played) / (double) hw->info.bytes_per_second);
 788 #endif
 789     return decr;
 790 }
 791
 792 static int dsound_ctl_in (HWVoiceIn *hw, int cmd, ...)
 793 {
 794     HRESULT hr;
 795     DWORD status;
 796     DSoundVoiceIn *ds = (DSoundVoiceIn *) hw;
 797     LPDIRECTSOUNDCAPTUREBUFFER dscb = ds->dsound_capture_buffer;
 798
 799     if (!dscb) {
 800         dolog ("Attempt to control capture voice without a buffer\n");
 801         return -1;
 802     }
 803
 804     switch (cmd) {
 805     case VOICE_ENABLE:
 806         if (dsound_get_status_in (dscb, &status)) {
 807             return -1;
 808         }
 809
 810         if (status & DSCBSTATUS_CAPTURING) {
 811             dolog ("warning: Voice is already capturing\n");
 812             return 0;
 813         }
 814
 815         /* clear ?? */
 816
 817         hr = IDirectSoundCaptureBuffer_Start (dscb, DSCBSTART_LOOPING);
 818         if (FAILED (hr)) {
 819             dsound_logerr (hr, "Could not start capturing\n");
 820             return -1;
 821         }
 822         break;
 823
 824     case VOICE_DISABLE:
 825         if (dsound_get_status_in (dscb, &status)) {
 826             return -1;
 827         }
 828
 829         if (status & DSCBSTATUS_CAPTURING) {
 830             hr = IDirectSoundCaptureBuffer_Stop (dscb);
 831             if (FAILED (hr)) {
 832                 dsound_logerr (hr, "Could not stop capturing\n");
 833                 return -1;
 834             }
 835         }
 836         else {
 837             dolog ("warning: Voice is not capturing\n");
 838         }
 839         break;
 840     }
 841     return 0;
 842 }
 843
 844 static int dsound_read (SWVoiceIn *sw, void *buf, int len)
 845 {
 846     return audio_pcm_sw_read (sw, buf, len);
 847 }
 848
 849 static int dsound_run_in (HWVoiceIn *hw)
 850 {
 851     int err;
 852     HRESULT hr;
 853     DSoundVoiceIn *ds = (DSoundVoiceIn *) hw;
 854     LPDIRECTSOUNDCAPTUREBUFFER dscb = ds->dsound_capture_buffer;
 855     int live, len, dead;
 856     DWORD blen1, blen2;
 857     DWORD len1, len2;
 858     DWORD decr;
 859     DWORD cpos, rpos;
 860     LPVOID p1, p2;
 861     int hwshift;
 862
 863     if (!dscb) {
 864         dolog ("Attempt to run without capture buffer\n");
 865         return 0;
 866     }
 867
 868     hwshift = hw->info.shift;
 869
 870     live = audio_pcm_hw_get_live_in (hw);
 871     dead = hw->samples - live;
 872     if (!dead) {
 873         return 0;
 874     }
 875
 876     hr = IDirectSoundCaptureBuffer_GetCurrentPosition (
 877         dscb,
 878         &cpos,
 879         ds->first_time ? &rpos : NULL
 880         );
 881     if (FAILED (hr)) {
 882         dsound_logerr (hr, "Could not get capture buffer position\n");
 883         return 0;
 884     }
 885
 886     if (ds->first_time) {
 887         ds->first_time = 0;
 888         if (rpos & hw->info.align) {
 889             ldebug ("warning: Misaligned capture read position %ld(%d)\n",
 890                     rpos, hw->info.align);
 891         }
 892         hw->wpos = rpos >> hwshift;
 893     }
 894
 895     if (cpos & hw->info.align) {
 896         ldebug ("warning: Misaligned capture position %ld(%d)\n",
 897                 cpos, hw->info.align);
 898     }
 899     cpos >>= hwshift;
 900
 901     len = audio_ring_dist (cpos, hw->wpos, hw->samples);
 902     if (!len) {
 903         return 0;
 904     }
 905     len = audio_MIN (len, dead);
 906
 907     err = dsound_lock_in (
 908         dscb,
 909         &hw->info,
 910         hw->wpos << hwshift,
 911         len << hwshift,
 912         &p1,
 913         &p2,
 914         &blen1,
 915         &blen2,
 916         0
 917         );
 918     if (err) {
 919         return 0;
 920     }
 921
 922     len1 = blen1 >> hwshift;
 923     len2 = blen2 >> hwshift;
 924     decr = len1 + len2;
 925
 926     if (p1 && len1) {
 927         hw->conv (hw->conv_buf + hw->wpos, p1, len1, &nominal_volume);
 928     }
 929
 930     if (p2 && len2) {
 931         hw->conv (hw->conv_buf, p2, len2, &nominal_volume);
 932     }
 933
 934     dsound_unlock_in (dscb, p1, p2, blen1, blen2);
 935     hw->wpos = (hw->wpos + decr) % hw->samples;
 936     return decr;
 937 }
 938
 939 static void dsound_audio_fini (void *opaque)
 940 {
 941     HRESULT hr;
 942     dsound *s = opaque;
 943
 944     if (!s->dsound) {
 945         return;
 946     }
 947
 948     hr = IDirectSound_Release (s->dsound);
 949     if (FAILED (hr)) {
 950         dsound_logerr (hr, "Could not release DirectSound\n");
 951     }
 952     s->dsound = NULL;
 953
 954     if (!s->dsound_capture) {
 955         return;
 956     }
 957
 958     hr = IDirectSoundCapture_Release (s->dsound_capture);
 959     if (FAILED (hr)) {
 960         dsound_logerr (hr, "Could not release DirectSoundCapture\n");
 961     }
 962     s->dsound_capture = NULL;
 963 }
 964
 965 static void *dsound_audio_init (void)
 966 {
 967     int err;
 968     HRESULT hr;
 969     dsound *s = &glob_dsound;
 970
 971     hr = CoInitialize (NULL);
 972     if (FAILED (hr)) {
 973         dsound_logerr (hr, "Could not initialize COM\n");
 974         return NULL;
 975     }
 976
 977     hr = CoCreateInstance (
 978         &CLSID_DirectSound,
 979         NULL,
 980         CLSCTX_ALL,
 981         &IID_IDirectSound,
 982         (void **) &s->dsound
 983         );
 984     if (FAILED (hr)) {
 985         dsound_logerr (hr, "Could not create DirectSound instance\n");
 986         return NULL;
 987     }
 988
 989     hr = IDirectSound_Initialize (s->dsound, NULL);
 990     if (FAILED (hr)) {
 991         dsound_logerr (hr, "Could not initialize DirectSound\n");
 992
 993         hr = IDirectSound_Release (s->dsound);
 994         if (FAILED (hr)) {
 995             dsound_logerr (hr, "Could not release DirectSound\n");
 996         }
 997         s->dsound = NULL;
 998         return NULL;
 999     }
1000
1001     hr = CoCreateInstance (
1002         &CLSID_DirectSoundCapture,
1003         NULL,
1004         CLSCTX_ALL,
1005         &IID_IDirectSoundCapture,
1006         (void **) &s->dsound_capture
1007         );
1008     if (FAILED (hr)) {
1009         dsound_logerr (hr, "Could not create DirectSoundCapture instance\n");
1010     }
1011     else {
1012         hr = IDirectSoundCapture_Initialize (s->dsound_capture, NULL);
1013         if (FAILED (hr)) {
1014             dsound_logerr (hr, "Could not initialize DirectSoundCapture\n");
1015
1016             hr = IDirectSoundCapture_Release (s->dsound_capture);
1017             if (FAILED (hr)) {
1018                 dsound_logerr (hr, "Could not release DirectSoundCapture\n");
1019             }
1020             s->dsound_capture = NULL;
1021         }
1022     }
1023
1024     err = dsound_open (s);
1025     if (err) {
1026         dsound_audio_fini (s);
1027         return NULL;
1028     }
1029
1030     return s;
1031 }
1032
1033 static struct audio_option dsound_options[] = {
1034     {
1035         .name  = "LOCK_RETRIES",
1036         .tag   = AUD_OPT_INT,
1037         .valp  = &conf.lock_retries,
1038         .descr = "Number of times to attempt locking the buffer"
1039     },
1040     {
1041         .name  = "RESTOURE_RETRIES",
1042         .tag   = AUD_OPT_INT,
1043         .valp  = &conf.restore_retries,
1044         .descr = "Number of times to attempt restoring the buffer"
1045     },
1046     {
1047         .name  = "GETSTATUS_RETRIES",
1048         .tag   = AUD_OPT_INT,
1049         .valp  = &conf.getstatus_retries,
1050         .descr = "Number of times to attempt getting status of the buffer"
1051     },
1052     {
1053         .name  = "SET_PRIMARY",
1054         .tag   = AUD_OPT_BOOL,
1055         .valp  = &conf.set_primary,
1056         .descr = "Set the parameters of primary buffer"
1057     },
1058     {
1059         .name  = "LATENCY_MILLIS",
1060         .tag   = AUD_OPT_INT,
1061         .valp  = &conf.latency_millis,
1062         .descr = "(undocumented)"
1063     },
1064     {
1065         .name  = "PRIMARY_FREQ",
1066         .tag   = AUD_OPT_INT,
1067         .valp  = &conf.settings.freq,
1068         .descr = "Primary buffer frequency"
1069     },
1070     {
1071         .name  = "PRIMARY_CHANNELS",
1072         .tag   = AUD_OPT_INT,
1073         .valp  = &conf.settings.nchannels,
1074         .descr = "Primary buffer number of channels (1 - mono, 2 - stereo)"
1075     },
1076     {
1077         .name  = "PRIMARY_FMT",
1078         .tag   = AUD_OPT_FMT,
1079         .valp  = &conf.settings.fmt,
1080         .descr = "Primary buffer format"
1081     },
1082     {
1083         .name  = "BUFSIZE_OUT",
1084         .tag   = AUD_OPT_INT,
1085         .valp  = &conf.bufsize_out,
1086         .descr = "(undocumented)"
1087     },
1088     {
1089         .name  = "BUFSIZE_IN",
1090         .tag   = AUD_OPT_INT,
1091         .valp  = &conf.bufsize_in,
1092         .descr = "(undocumented)"
1093     },
1094     { /* End of list */ }
1095 };
1096
1097 static struct audio_pcm_ops dsound_pcm_ops = {
1098     .init_out = dsound_init_out,
1099     .fini_out = dsound_fini_out,
1100     .run_out  = dsound_run_out,
1101     .write    = dsound_write,
1102     .ctl_out  = dsound_ctl_out,
1103
1104     .init_in  = dsound_init_in,
1105     .fini_in  = dsound_fini_in,
1106     .run_in   = dsound_run_in,
1107     .read     = dsound_read,
1108     .ctl_in   = dsound_ctl_in
1109 };
1110
1111 struct audio_driver dsound_audio_driver = {
1112     .name           = "dsound",
1113     .descr          = "DirectSound http://wikipedia.org/wiki/DirectSound",
1114     .options        = dsound_options,
1115     .init           = dsound_audio_init,
1116     .fini           = dsound_audio_fini,
1117     .pcm_ops        = &dsound_pcm_ops,
1118     .can_be_default = 1,
1119     .max_voices_out = INT_MAX,
1120     .max_voices_in  = 1,
1121     .voice_size_out = sizeof (DSoundVoiceOut),
1122     .voice_size_in  = sizeof (DSoundVoiceIn)
1123 };