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