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 #define WIN32_LEAN_AND_MEAN
  36 #include <windows.h>
  37 #include <mmsystem.h>
  38 #include <objbase.h>
  39 #include <dsound.h>
  40
  41 /* #define DEBUG_DSOUND */
  42
  43 static struct {
  44     int lock_retries;
  45     int restore_retries;
  46     int getstatus_retries;
  47     int set_primary;
  48     int bufsize_in;
  49     int bufsize_out;
  50     audsettings_t settings;
  51     int latency_millis;
  52 } conf = {
  53     1,
  54     1,
  55     1,
  56     0,
  57     16384,
  58     16384,
  59     {
  60         44100,
  61         2,
  62         AUD_FMT_S16
  63     },
  64     10
  65 };
  66
  67 typedef struct {
  68     LPDIRECTSOUND dsound;
  69     LPDIRECTSOUNDCAPTURE dsound_capture;
  70     LPDIRECTSOUNDBUFFER dsound_primary_buffer;
  71     audsettings_t settings;
  72 } dsound;
  73
  74 static dsound glob_dsound;
  75
  76 typedef struct {
  77     HWVoiceOut hw;
  78     LPDIRECTSOUNDBUFFER dsound_buffer;
  79     DWORD old_pos;
  80     int first_time;
  81 #ifdef DEBUG_DSOUND
  82     DWORD old_ppos;
  83     DWORD played;
  84     DWORD mixed;
  85 #endif
  86 } DSoundVoiceOut;
  87
  88 typedef struct {
  89     HWVoiceIn hw;
  90     int first_time;
  91     LPDIRECTSOUNDCAPTUREBUFFER dsound_capture_buffer;
  92 } DSoundVoiceIn;
  93
  94 static void dsound_log_hresult (HRESULT hr)
  95 {
  96     const char *str = "BUG";
  97
  98     switch (hr) {
  99     case DS_OK:
 100         str = "The method succeeded";
 101         break;
 102 #ifdef DS_NO_VIRTUALIZATION
 103     case DS_NO_VIRTUALIZATION:
 104         str = "The buffer was created, but another 3D algorithm was substituted";
 105         break;
 106 #endif
 107 #ifdef DS_INCOMPLETE
 108     case DS_INCOMPLETE:
 109         str = "The method succeeded, but not all the optional effects were obtained";
 110         break;
 111 #endif
 112 #ifdef DSERR_ACCESSDENIED
 113     case DSERR_ACCESSDENIED:
 114         str = "The request failed because access was denied";
 115         break;
 116 #endif
 117 #ifdef DSERR_ALLOCATED
 118     case DSERR_ALLOCATED:
 119         str = "The request failed because resources, such as a priority level, were already in use by another caller";
 120         break;
 121 #endif
 122 #ifdef DSERR_ALREADYINITIALIZED
 123     case DSERR_ALREADYINITIALIZED:
 124         str = "The object is already initialized";
 125         break;
 126 #endif
 127 #ifdef DSERR_BADFORMAT
 128     case DSERR_BADFORMAT:
 129         str = "The specified wave format is not supported";
 130         break;
 131 #endif
 132 #ifdef DSERR_BADSENDBUFFERGUID
 133     case DSERR_BADSENDBUFFERGUID:
 134         str = "The GUID specified in an audiopath file does not match a valid mix-in buffer";
 135         break;
 136 #endif
 137 #ifdef DSERR_BUFFERLOST
 138     case DSERR_BUFFERLOST:
 139         str = "The buffer memory has been lost and must be restored";
 140         break;
 141 #endif
 142 #ifdef DSERR_BUFFERTOOSMALL
 143     case DSERR_BUFFERTOOSMALL:
 144         str = "The buffer size is not great enough to enable effects processing";
 145         break;
 146 #endif
 147 #ifdef DSERR_CONTROLUNAVAIL
 148     case DSERR_CONTROLUNAVAIL:
 149         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";
 150         break;
 151 #endif
 152 #ifdef DSERR_DS8_REQUIRED
 153     case DSERR_DS8_REQUIRED:
 154         str = "A DirectSound object of class CLSID_DirectSound8 or later is required for the requested functionality. For more information, see IDirectSound8 Interface";
 155         break;
 156 #endif
 157 #ifdef DSERR_FXUNAVAILABLE
 158     case DSERR_FXUNAVAILABLE:
 159         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";
 160         break;
 161 #endif
 162 #ifdef DSERR_GENERIC
 163     case DSERR_GENERIC :
 164         str = "An undetermined error occurred inside the DirectSound subsystem";
 165         break;
 166 #endif
 167 #ifdef DSERR_INVALIDCALL
 168     case DSERR_INVALIDCALL:
 169         str = "This function is not valid for the current state of this object";
 170         break;
 171 #endif
 172 #ifdef DSERR_INVALIDPARAM
 173     case DSERR_INVALIDPARAM:
 174         str = "An invalid parameter was passed to the returning function";
 175         break;
 176 #endif
 177 #ifdef DSERR_NOAGGREGATION
 178     case DSERR_NOAGGREGATION:
 179         str = "The object does not support aggregation";
 180         break;
 181 #endif
 182 #ifdef DSERR_NODRIVER
 183     case DSERR_NODRIVER:
 184         str = "No sound driver is available for use, or the given GUID is not a valid DirectSound device ID";
 185         break;
 186 #endif
 187 #ifdef DSERR_NOINTERFACE
 188     case DSERR_NOINTERFACE:
 189         str = "The requested COM interface is not available";
 190         break;
 191 #endif
 192 #ifdef DSERR_OBJECTNOTFOUND
 193     case DSERR_OBJECTNOTFOUND:
 194         str = "The requested object was not found";
 195         break;
 196 #endif
 197 #ifdef DSERR_OTHERAPPHASPRIO
 198     case DSERR_OTHERAPPHASPRIO:
 199         str = "Another application has a higher priority level, preventing this call from succeeding";
 200         break;
 201 #endif
 202 #ifdef DSERR_OUTOFMEMORY
 203     case DSERR_OUTOFMEMORY:
 204         str = "The DirectSound subsystem could not allocate sufficient memory to complete the caller's request";
 205         break;
 206 #endif
 207 #ifdef DSERR_PRIOLEVELNEEDED
 208     case DSERR_PRIOLEVELNEEDED:
 209         str = "A cooperative level of DSSCL_PRIORITY or higher is required";
 210         break;
 211 #endif
 212 #ifdef DSERR_SENDLOOP
 213     case DSERR_SENDLOOP:
 214         str = "A circular loop of send effects was detected";
 215         break;
 216 #endif
 217 #ifdef DSERR_UNINITIALIZED
 218     case DSERR_UNINITIALIZED:
 219         str = "The Initialize method has not been called or has not been called successfully before other methods were called";
 220         break;
 221 #endif
 222 #ifdef DSERR_UNSUPPORTED
 223     case DSERR_UNSUPPORTED:
 224         str = "The function called is not supported at this time";
 225         break;
 226 #endif
 227     default:
 228         AUD_log (AUDIO_CAP, "Reason: Unknown (HRESULT %#lx)\n", hr);
 229         return;
 230     }
 231
 232     AUD_log (AUDIO_CAP, "Reason: %s\n", str);
 233 }
 234
 235 static void GCC_FMT_ATTR (2, 3) dsound_logerr (
 236     HRESULT hr,
 237     const char *fmt,
 238     ...
 239     )
 240 {
 241     va_list ap;
 242
 243     va_start (ap, fmt);
 244     AUD_vlog (AUDIO_CAP, fmt, ap);
 245     va_end (ap);
 246
 247     dsound_log_hresult (hr);
 248 }
 249
 250 static void GCC_FMT_ATTR (3, 4) dsound_logerr2 (
 251     HRESULT hr,
 252     const char *typ,
 253     const char *fmt,
 254     ...
 255     )
 256 {
 257     va_list ap;
 258
 259     AUD_log (AUDIO_CAP, "Could not initialize %s\n", typ);
 260     va_start (ap, fmt);
 261     AUD_vlog (AUDIO_CAP, fmt, ap);
 262     va_end (ap);
 263
 264     dsound_log_hresult (hr);
 265 }
 266
 267 static DWORD millis_to_bytes (struct audio_pcm_info *info, DWORD millis)
 268 {
 269     return (millis * info->bytes_per_second) / 1000;
 270 }
 271
 272 #ifdef DEBUG_DSOUND
 273 static void print_wave_format (WAVEFORMATEX *wfx)
 274 {
 275     dolog ("tag             = %d\n", wfx->wFormatTag);
 276     dolog ("nChannels       = %d\n", wfx->nChannels);
 277     dolog ("nSamplesPerSec  = %ld\n", wfx->nSamplesPerSec);
 278     dolog ("nAvgBytesPerSec = %ld\n", wfx->nAvgBytesPerSec);
 279     dolog ("nBlockAlign     = %d\n", wfx->nBlockAlign);
 280     dolog ("wBitsPerSample  = %d\n", wfx->wBitsPerSample);
 281     dolog ("cbSize          = %d\n", wfx->cbSize);
 282 }
 283 #endif
 284
 285 static int dsound_restore_out (LPDIRECTSOUNDBUFFER dsb)
 286 {
 287     HRESULT hr;
 288     int i;
 289
 290     for (i = 0; i < conf.restore_retries; ++i) {
 291         hr = IDirectSoundBuffer_Restore (dsb);
 292
 293         switch (hr) {
 294         case DS_OK:
 295             return 0;
 296
 297         case DSERR_BUFFERLOST:
 298             continue;
 299
 300         default:
 301             dsound_logerr (hr, "Could not restore playback buffer\n");
 302             return -1;
 303         }
 304     }
 305
 306     dolog ("%d attempts to restore playback buffer failed\n", i);
 307     return -1;
 308 }
 309
 310 static int waveformat_from_audio_settings (WAVEFORMATEX *wfx, audsettings_t *as)
 311 {
 312     memset (wfx, 0, sizeof (*wfx));
 313
 314     wfx->wFormatTag = WAVE_FORMAT_PCM;
 315     wfx->nChannels = as->nchannels;
 316     wfx->nSamplesPerSec = as->freq;
 317     wfx->nAvgBytesPerSec = as->freq << (as->nchannels == 2);
 318     wfx->nBlockAlign = 1 << (as->nchannels == 2);
 319     wfx->cbSize = 0;
 320
 321     switch (as->fmt) {
 322     case AUD_FMT_S8:
 323     case AUD_FMT_U8:
 324         wfx->wBitsPerSample = 8;
 325         break;
 326
 327     case AUD_FMT_S16:
 328     case AUD_FMT_U16:
 329         wfx->wBitsPerSample = 16;
 330         wfx->nAvgBytesPerSec <<= 1;
 331         wfx->nBlockAlign <<= 1;
 332         break;
 333
 334     case AUD_FMT_S32:
 335     case AUD_FMT_U32:
 336         wfx->wBitsPerSample = 32;
 337         wfx->nAvgBytesPerSec <<= 2;
 338         wfx->nBlockAlign <<= 2;
 339         break;
 340
 341     default:
 342         dolog ("Internal logic error: Bad audio format %d\n", as->freq);
 343         return -1;
 344     }
 345
 346     return 0;
 347 }
 348
 349 static int waveformat_to_audio_settings (WAVEFORMATEX *wfx, audsettings_t *as)
 350 {
 351     if (wfx->wFormatTag != WAVE_FORMAT_PCM) {
 352         dolog ("Invalid wave format, tag is not PCM, but %d\n",
 353                wfx->wFormatTag);
 354         return -1;
 355     }
 356
 357     if (!wfx->nSamplesPerSec) {
 358         dolog ("Invalid wave format, frequency is zero\n");
 359         return -1;
 360     }
 361     as->freq = wfx->nSamplesPerSec;
 362
 363     switch (wfx->nChannels) {
 364     case 1:
 365         as->nchannels = 1;
 366         break;
 367
 368     case 2:
 369         as->nchannels = 2;
 370         break;
 371
 372     default:
 373         dolog (
 374             "Invalid wave format, number of channels is not 1 or 2, but %d\n",
 375             wfx->nChannels
 376             );
 377         return -1;
 378     }
 379
 380     switch (wfx->wBitsPerSample) {
 381     case 8:
 382         as->fmt = AUD_FMT_U8;
 383         break;
 384
 385     case 16:
 386         as->fmt = AUD_FMT_S16;
 387         break;
 388
 389     case 32:
 390         as->fmt = AUD_FMT_S32;
 391         break;
 392
 393     default:
 394         dolog ("Invalid wave format, bits per sample is not "
 395                "8, 16 or 32, but %d\n",
 396                wfx->wBitsPerSample);
 397         return -1;
 398     }
 399
 400     return 0;
 401 }
 402
 403 #include "dsound_template.h"
 404 #define DSBTYPE_IN
 405 #include "dsound_template.h"
 406 #undef DSBTYPE_IN
 407
 408 static int dsound_get_status_out (LPDIRECTSOUNDBUFFER dsb, DWORD *statusp)
 409 {
 410     HRESULT hr;
 411     int i;
 412
 413     for (i = 0; i < conf.getstatus_retries; ++i) {
 414         hr = IDirectSoundBuffer_GetStatus (dsb, statusp);
 415         if (FAILED (hr)) {
 416             dsound_logerr (hr, "Could not get playback buffer status\n");
 417             return -1;
 418         }
 419
 420         if (*statusp & DSERR_BUFFERLOST) {
 421             if (dsound_restore_out (dsb)) {
 422                 return -1;
 423             }
 424             continue;
 425         }
 426         break;
 427     }
 428
 429     return 0;
 430 }
 431
 432 static int dsound_get_status_in (LPDIRECTSOUNDCAPTUREBUFFER dscb,
 433                                  DWORD *statusp)
 434 {
 435     HRESULT hr;
 436
 437     hr = IDirectSoundCaptureBuffer_GetStatus (dscb, statusp);
 438     if (FAILED (hr)) {
 439         dsound_logerr (hr, "Could not get capture buffer status\n");
 440         return -1;
 441     }
 442
 443     return 0;
 444 }
 445
 446 static void dsound_write_sample (HWVoiceOut *hw, uint8_t *dst, int dst_len)
 447 {
 448     int src_len1 = dst_len;
 449     int src_len2 = 0;
 450     int pos = hw->rpos + dst_len;
 451     st_sample_t *src1 = hw->mix_buf + hw->rpos;
 452     st_sample_t *src2 = NULL;
 453
 454     if (pos > hw->samples) {
 455         src_len1 = hw->samples - hw->rpos;
 456         src2 = hw->mix_buf;
 457         src_len2 = dst_len - src_len1;
 458         pos = src_len2;
 459     }
 460
 461     if (src_len1) {
 462         hw->clip (dst, src1, src_len1);
 463     }
 464
 465     if (src_len2) {
 466         dst = advance (dst, src_len1 << hw->info.shift);
 467         hw->clip (dst, src2, src_len2);
 468     }
 469
 470     hw->rpos = pos % hw->samples;
 471 }
 472
 473 static void dsound_clear_sample (HWVoiceOut *hw, LPDIRECTSOUNDBUFFER dsb)
 474 {
 475     int err;
 476     LPVOID p1, p2;
 477     DWORD blen1, blen2, len1, len2;
 478
 479     err = dsound_lock_out (
 480         dsb,
 481         &hw->info,
 482         0,
 483         hw->samples << hw->info.shift,
 484         &p1, &p2,
 485         &blen1, &blen2,
 486         1
 487         );
 488     if (err) {
 489         return;
 490     }
 491
 492     len1 = blen1 >> hw->info.shift;
 493     len2 = blen2 >> hw->info.shift;
 494
 495 #ifdef DEBUG_DSOUND
 496     dolog ("clear %p,%ld,%ld %p,%ld,%ld\n",
 497            p1, blen1, len1,
 498            p2, blen2, len2);
 499 #endif
 500
 501     if (p1 && len1) {
 502         audio_pcm_info_clear_buf (&hw->info, p1, len1);
 503     }
 504
 505     if (p2 && len2) {
 506         audio_pcm_info_clear_buf (&hw->info, p2, len2);
 507     }
 508
 509     dsound_unlock_out (dsb, p1, p2, blen1, blen2);
 510 }
 511
 512 static void dsound_close (dsound *s)
 513 {
 514     HRESULT hr;
 515
 516     if (s->dsound_primary_buffer) {
 517         hr = IDirectSoundBuffer_Release (s->dsound_primary_buffer);
 518         if (FAILED (hr)) {
 519             dsound_logerr (hr, "Could not release primary buffer\n");
 520         }
 521         s->dsound_primary_buffer = NULL;
 522     }
 523 }
 524
 525 static int dsound_open (dsound *s)
 526 {
 527     int err;
 528     HRESULT hr;
 529     WAVEFORMATEX wfx;
 530     DSBUFFERDESC dsbd;
 531     HWND hwnd;
 532
 533     hwnd = GetForegroundWindow ();
 534     hr = IDirectSound_SetCooperativeLevel (
 535         s->dsound,
 536         hwnd,
 537         DSSCL_PRIORITY
 538         );
 539
 540     if (FAILED (hr)) {
 541         dsound_logerr (hr, "Could not set cooperative level for window %p\n",
 542                        hwnd);
 543         return -1;
 544     }
 545
 546     if (!conf.set_primary) {
 547         return 0;
 548     }
 549
 550     err = waveformat_from_audio_settings (&wfx, &conf.settings);
 551     if (err) {
 552         return -1;
 553     }
 554
 555     memset (&dsbd, 0, sizeof (dsbd));
 556     dsbd.dwSize = sizeof (dsbd);
 557     dsbd.dwFlags = DSBCAPS_PRIMARYBUFFER;
 558     dsbd.dwBufferBytes = 0;
 559     dsbd.lpwfxFormat = NULL;
 560
 561     hr = IDirectSound_CreateSoundBuffer (
 562         s->dsound,
 563         &dsbd,
 564         &s->dsound_primary_buffer,
 565         NULL
 566         );
 567     if (FAILED (hr)) {
 568         dsound_logerr (hr, "Could not create primary playback buffer\n");
 569         return -1;
 570     }
 571
 572     hr = IDirectSoundBuffer_SetFormat (s->dsound_primary_buffer, &wfx);
 573     if (FAILED (hr)) {
 574         dsound_logerr (hr, "Could not set primary playback buffer format\n");
 575     }
 576
 577     hr = IDirectSoundBuffer_GetFormat (
 578         s->dsound_primary_buffer,
 579         &wfx,
 580         sizeof (wfx),
 581         NULL
 582         );
 583     if (FAILED (hr)) {
 584         dsound_logerr (hr, "Could not get primary playback buffer format\n");
 585         goto fail0;
 586     }
 587
 588 #ifdef DEBUG_DSOUND
 589     dolog ("Primary\n");
 590     print_wave_format (&wfx);
 591 #endif
 592
 593     err = waveformat_to_audio_settings (&wfx, &s->settings);
 594     if (err) {
 595         goto fail0;
 596     }
 597
 598     return 0;
 599
 600  fail0:
 601     dsound_close (s);
 602     return -1;
 603 }
 604
 605 static int dsound_ctl_out (HWVoiceOut *hw, int cmd, ...)
 606 {
 607     HRESULT hr;
 608     DWORD status;
 609     DSoundVoiceOut *ds = (DSoundVoiceOut *) hw;
 610     LPDIRECTSOUNDBUFFER dsb = ds->dsound_buffer;
 611
 612     if (!dsb) {
 613         dolog ("Attempt to control voice without a buffer\n");
 614         return 0;
 615     }
 616
 617     switch (cmd) {
 618     case VOICE_ENABLE:
 619         if (dsound_get_status_out (dsb, &status)) {
 620             return -1;
 621         }
 622
 623         if (status & DSBSTATUS_PLAYING) {
 624             dolog ("warning: Voice is already playing\n");
 625             return 0;
 626         }
 627
 628         dsound_clear_sample (hw, dsb);
 629
 630         hr = IDirectSoundBuffer_Play (dsb, 0, 0, DSBPLAY_LOOPING);
 631         if (FAILED (hr)) {
 632             dsound_logerr (hr, "Could not start playing buffer\n");
 633             return -1;
 634         }
 635         break;
 636
 637     case VOICE_DISABLE:
 638         if (dsound_get_status_out (dsb, &status)) {
 639             return -1;
 640         }
 641
 642         if (status & DSBSTATUS_PLAYING) {
 643             hr = IDirectSoundBuffer_Stop (dsb);
 644             if (FAILED (hr)) {
 645                 dsound_logerr (hr, "Could not stop playing buffer\n");
 646                 return -1;
 647             }
 648         }
 649         else {
 650             dolog ("warning: Voice is not playing\n");
 651         }
 652         break;
 653     }
 654     return 0;
 655 }
 656
 657 static int dsound_write (SWVoiceOut *sw, void *buf, int len)
 658 {
 659     return audio_pcm_sw_write (sw, buf, len);
 660 }
 661
 662 static int dsound_run_out (HWVoiceOut *hw)
 663 {
 664     int err;
 665     HRESULT hr;
 666     DSoundVoiceOut *ds = (DSoundVoiceOut *) hw;
 667     LPDIRECTSOUNDBUFFER dsb = ds->dsound_buffer;
 668     int live, len, hwshift;
 669     DWORD blen1, blen2;
 670     DWORD len1, len2;
 671     DWORD decr;
 672     DWORD wpos, ppos, old_pos;
 673     LPVOID p1, p2;
 674     int bufsize;
 675
 676     if (!dsb) {
 677         dolog ("Attempt to run empty with playback buffer\n");
 678         return 0;
 679     }
 680
 681     hwshift = hw->info.shift;
 682     bufsize = hw->samples << hwshift;
 683
 684     live = audio_pcm_hw_get_live_out (hw);
 685
 686     hr = IDirectSoundBuffer_GetCurrentPosition (
 687         dsb,
 688         &ppos,
 689         ds->first_time ? &wpos : NULL
 690         );
 691     if (FAILED (hr)) {
 692         dsound_logerr (hr, "Could not get playback buffer position\n");
 693         return 0;
 694     }
 695
 696     len = live << hwshift;
 697
 698     if (ds->first_time) {
 699         if (conf.latency_millis) {
 700             DWORD cur_blat;
 701
 702             cur_blat = audio_ring_dist (wpos, ppos, bufsize);
 703             ds->first_time = 0;
 704             old_pos = wpos;
 705             old_pos +=
 706                 millis_to_bytes (&hw->info, conf.latency_millis) - cur_blat;
 707             old_pos %= bufsize;
 708             old_pos &= ~hw->info.align;
 709         }
 710         else {
 711             old_pos = wpos;
 712         }
 713 #ifdef DEBUG_DSOUND
 714         ds->played = 0;
 715         ds->mixed = 0;
 716 #endif
 717     }
 718     else {
 719         if (ds->old_pos == ppos) {
 720 #ifdef DEBUG_DSOUND
 721             dolog ("old_pos == ppos\n");
 722 #endif
 723             return 0;
 724         }
 725
 726 #ifdef DEBUG_DSOUND
 727         ds->played += audio_ring_dist (ds->old_pos, ppos, hw->bufsize);
 728 #endif
 729         old_pos = ds->old_pos;
 730     }
 731
 732     if ((old_pos < ppos) && ((old_pos + len) > ppos)) {
 733         len = ppos - old_pos;
 734     }
 735     else {
 736         if ((old_pos > ppos) && ((old_pos + len) > (ppos + bufsize))) {
 737             len = bufsize - old_pos + ppos;
 738         }
 739     }
 740
 741     if (audio_bug (AUDIO_FUNC, len < 0 || len > bufsize)) {
 742         dolog ("len=%d bufsize=%d old_pos=%ld ppos=%ld\n",
 743                len, bufsize, old_pos, ppos);
 744         return 0;
 745     }
 746
 747     len &= ~hw->info.align;
 748     if (!len) {
 749         return 0;
 750     }
 751
 752 #ifdef DEBUG_DSOUND
 753     ds->old_ppos = ppos;
 754 #endif
 755     err = dsound_lock_out (
 756         dsb,
 757         &hw->info,
 758         old_pos,
 759         len,
 760         &p1, &p2,
 761         &blen1, &blen2,
 762         0
 763         );
 764     if (err) {
 765         return 0;
 766     }
 767
 768     len1 = blen1 >> hwshift;
 769     len2 = blen2 >> hwshift;
 770     decr = len1 + len2;
 771
 772     if (p1 && len1) {
 773         dsound_write_sample (hw, p1, len1);
 774     }
 775
 776     if (p2 && len2) {
 777         dsound_write_sample (hw, p2, len2);
 778     }
 779
 780     dsound_unlock_out (dsb, p1, p2, blen1, blen2);
 781     ds->old_pos = (old_pos + (decr << hwshift)) % bufsize;
 782
 783 #ifdef DEBUG_DSOUND
 784     ds->mixed += decr << hwshift;
 785
 786     dolog ("played %lu mixed %lu diff %ld sec %f\n",
 787            ds->played,
 788            ds->mixed,
 789            ds->mixed - ds->played,
 790            abs (ds->mixed - ds->played) / (double) hw->info.bytes_per_second);
 791 #endif
 792     return decr;
 793 }
 794
 795 static int dsound_ctl_in (HWVoiceIn *hw, int cmd, ...)
 796 {
 797     HRESULT hr;
 798     DWORD status;
 799     DSoundVoiceIn *ds = (DSoundVoiceIn *) hw;
 800     LPDIRECTSOUNDCAPTUREBUFFER dscb = ds->dsound_capture_buffer;
 801
 802     if (!dscb) {
 803         dolog ("Attempt to control capture voice without a buffer\n");
 804         return -1;
 805     }
 806
 807     switch (cmd) {
 808     case VOICE_ENABLE:
 809         if (dsound_get_status_in (dscb, &status)) {
 810             return -1;
 811         }
 812
 813         if (status & DSCBSTATUS_CAPTURING) {
 814             dolog ("warning: Voice is already capturing\n");
 815             return 0;
 816         }
 817
 818         /* clear ?? */
 819
 820         hr = IDirectSoundCaptureBuffer_Start (dscb, DSCBSTART_LOOPING);
 821         if (FAILED (hr)) {
 822             dsound_logerr (hr, "Could not start capturing\n");
 823             return -1;
 824         }
 825         break;
 826
 827     case VOICE_DISABLE:
 828         if (dsound_get_status_in (dscb, &status)) {
 829             return -1;
 830         }
 831
 832         if (status & DSCBSTATUS_CAPTURING) {
 833             hr = IDirectSoundCaptureBuffer_Stop (dscb);
 834             if (FAILED (hr)) {
 835                 dsound_logerr (hr, "Could not stop capturing\n");
 836                 return -1;
 837             }
 838         }
 839         else {
 840             dolog ("warning: Voice is not capturing\n");
 841         }
 842         break;
 843     }
 844     return 0;
 845 }
 846
 847 static int dsound_read (SWVoiceIn *sw, void *buf, int len)
 848 {
 849     return audio_pcm_sw_read (sw, buf, len);
 850 }
 851
 852 static int dsound_run_in (HWVoiceIn *hw)
 853 {
 854     int err;
 855     HRESULT hr;
 856     DSoundVoiceIn *ds = (DSoundVoiceIn *) hw;
 857     LPDIRECTSOUNDCAPTUREBUFFER dscb = ds->dsound_capture_buffer;
 858     int live, len, dead;
 859     DWORD blen1, blen2;
 860     DWORD len1, len2;
 861     DWORD decr;
 862     DWORD cpos, rpos;
 863     LPVOID p1, p2;
 864     int hwshift;
 865
 866     if (!dscb) {
 867         dolog ("Attempt to run without capture buffer\n");
 868         return 0;
 869     }
 870
 871     hwshift = hw->info.shift;
 872
 873     live = audio_pcm_hw_get_live_in (hw);
 874     dead = hw->samples - live;
 875     if (!dead) {
 876         return 0;
 877     }
 878
 879     hr = IDirectSoundCaptureBuffer_GetCurrentPosition (
 880         dscb,
 881         &cpos,
 882         ds->first_time ? &rpos : NULL
 883         );
 884     if (FAILED (hr)) {
 885         dsound_logerr (hr, "Could not get capture buffer position\n");
 886         return 0;
 887     }
 888
 889     if (ds->first_time) {
 890         ds->first_time = 0;
 891         if (rpos & hw->info.align) {
 892             ldebug ("warning: Misaligned capture read position %ld(%d)\n",
 893                     rpos, hw->info.align);
 894         }
 895         hw->wpos = rpos >> hwshift;
 896     }
 897
 898     if (cpos & hw->info.align) {
 899         ldebug ("warning: Misaligned capture position %ld(%d)\n",
 900                 cpos, hw->info.align);
 901     }
 902     cpos >>= hwshift;
 903
 904     len = audio_ring_dist (cpos, hw->wpos, hw->samples);
 905     if (!len) {
 906         return 0;
 907     }
 908     len = audio_MIN (len, dead);
 909
 910     err = dsound_lock_in (
 911         dscb,
 912         &hw->info,
 913         hw->wpos << hwshift,
 914         len << hwshift,
 915         &p1,
 916         &p2,
 917         &blen1,
 918         &blen2,
 919         0
 920         );
 921     if (err) {
 922         return 0;
 923     }
 924
 925     len1 = blen1 >> hwshift;
 926     len2 = blen2 >> hwshift;
 927     decr = len1 + len2;
 928
 929     if (p1 && len1) {
 930         hw->conv (hw->conv_buf + hw->wpos, p1, len1, &nominal_volume);
 931     }
 932
 933     if (p2 && len2) {
 934         hw->conv (hw->conv_buf, p2, len2, &nominal_volume);
 935     }
 936
 937     dsound_unlock_in (dscb, p1, p2, blen1, blen2);
 938     hw->wpos = (hw->wpos + decr) % hw->samples;
 939     return decr;
 940 }
 941
 942 static void dsound_audio_fini (void *opaque)
 943 {
 944     HRESULT hr;
 945     dsound *s = opaque;
 946
 947     if (!s->dsound) {
 948         return;
 949     }
 950
 951     hr = IDirectSound_Release (s->dsound);
 952     if (FAILED (hr)) {
 953         dsound_logerr (hr, "Could not release DirectSound\n");
 954     }
 955     s->dsound = NULL;
 956
 957     if (!s->dsound_capture) {
 958         return;
 959     }
 960
 961     hr = IDirectSoundCapture_Release (s->dsound_capture);
 962     if (FAILED (hr)) {
 963         dsound_logerr (hr, "Could not release DirectSoundCapture\n");
 964     }
 965     s->dsound_capture = NULL;
 966 }
 967
 968 static void *dsound_audio_init (void)
 969 {
 970     int err;
 971     HRESULT hr;
 972     dsound *s = &glob_dsound;
 973
 974     hr = CoInitialize (NULL);
 975     if (FAILED (hr)) {
 976         dsound_logerr (hr, "Could not initialize COM\n");
 977         return NULL;
 978     }
 979
 980     hr = CoCreateInstance (
 981         &CLSID_DirectSound,
 982         NULL,
 983         CLSCTX_ALL,
 984         &IID_IDirectSound,
 985         (void **) &s->dsound
 986         );
 987     if (FAILED (hr)) {
 988         dsound_logerr (hr, "Could not create DirectSound instance\n");
 989         return NULL;
 990     }
 991
 992     hr = IDirectSound_Initialize (s->dsound, NULL);
 993     if (FAILED (hr)) {
 994         dsound_logerr (hr, "Could not initialize DirectSound\n");
 995
 996         hr = IDirectSound_Release (s->dsound);
 997         if (FAILED (hr)) {
 998             dsound_logerr (hr, "Could not release DirectSound\n");
 999         }
1000         s->dsound = NULL;
1001         return NULL;
1002     }
1003
1004     hr = CoCreateInstance (
1005         &CLSID_DirectSoundCapture,
1006         NULL,
1007         CLSCTX_ALL,
1008         &IID_IDirectSoundCapture,
1009         (void **) &s->dsound_capture
1010         );
1011     if (FAILED (hr)) {
1012         dsound_logerr (hr, "Could not create DirectSoundCapture instance\n");
1013     }
1014     else {
1015         hr = IDirectSoundCapture_Initialize (s->dsound_capture, NULL);
1016         if (FAILED (hr)) {
1017             dsound_logerr (hr, "Could not initialize DirectSoundCapture\n");
1018
1019             hr = IDirectSoundCapture_Release (s->dsound_capture);
1020             if (FAILED (hr)) {
1021                 dsound_logerr (hr, "Could not release DirectSoundCapture\n");
1022             }
1023             s->dsound_capture = NULL;
1024         }
1025     }
1026
1027     err = dsound_open (s);
1028     if (err) {
1029         dsound_audio_fini (s);
1030         return NULL;
1031     }
1032
1033     return s;
1034 }
1035
1036 static struct audio_option dsound_options[] = {
1037     {"LOCK_RETRIES", AUD_OPT_INT, &conf.lock_retries,
1038      "Number of times to attempt locking the buffer", NULL, 0},
1039     {"RESTOURE_RETRIES", AUD_OPT_INT, &conf.restore_retries,
1040      "Number of times to attempt restoring the buffer", NULL, 0},
1041     {"GETSTATUS_RETRIES", AUD_OPT_INT, &conf.getstatus_retries,
1042      "Number of times to attempt getting status of the buffer", NULL, 0},
1043     {"SET_PRIMARY", AUD_OPT_BOOL, &conf.set_primary,
1044      "Set the parameters of primary buffer", NULL, 0},
1045     {"LATENCY_MILLIS", AUD_OPT_INT, &conf.latency_millis,
1046      "(undocumented)", NULL, 0},
1047     {"PRIMARY_FREQ", AUD_OPT_INT, &conf.settings.freq,
1048      "Primary buffer frequency", NULL, 0},
1049     {"PRIMARY_CHANNELS", AUD_OPT_INT, &conf.settings.nchannels,
1050      "Primary buffer number of channels (1 - mono, 2 - stereo)", NULL, 0},
1051     {"PRIMARY_FMT", AUD_OPT_FMT, &conf.settings.fmt,
1052      "Primary buffer format", NULL, 0},
1053     {"BUFSIZE_OUT", AUD_OPT_INT, &conf.bufsize_out,
1054      "(undocumented)", NULL, 0},
1055     {"BUFSIZE_IN", AUD_OPT_INT, &conf.bufsize_in,
1056      "(undocumented)", NULL, 0},
1057     {NULL, 0, NULL, NULL, NULL, 0}
1058 };
1059
1060 static struct audio_pcm_ops dsound_pcm_ops = {
1061     dsound_init_out,
1062     dsound_fini_out,
1063     dsound_run_out,
1064     dsound_write,
1065     dsound_ctl_out,
1066
1067     dsound_init_in,
1068     dsound_fini_in,
1069     dsound_run_in,
1070     dsound_read,
1071     dsound_ctl_in
1072 };
1073
1074 struct audio_driver dsound_audio_driver = {
1075     INIT_FIELD (name           = ) "dsound",
1076     INIT_FIELD (descr          = )
1077     "DirectSound http://wikipedia.org/wiki/DirectSound",
1078     INIT_FIELD (options        = ) dsound_options,
1079     INIT_FIELD (init           = ) dsound_audio_init,
1080     INIT_FIELD (fini           = ) dsound_audio_fini,
1081     INIT_FIELD (pcm_ops        = ) &dsound_pcm_ops,
1082     INIT_FIELD (can_be_default = ) 1,
1083     INIT_FIELD (max_voices_out = ) INT_MAX,
1084     INIT_FIELD (max_voices_in  = ) 1,
1085     INIT_FIELD (voice_size_out = ) sizeof (DSoundVoiceOut),
1086     INIT_FIELD (voice_size_in  = ) sizeof (DSoundVoiceIn)
1087 };