dsound_private.h

   1 /*                      DirectSound
   2  *
   3  * Copyright 1998 Marcus Meissner
   4  * Copyright 1998 Rob Riggs
   5  * Copyright 2000-2001 TransGaming Technologies, Inc.
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21
  22 /* Linux does not support better timing than 10ms */
  23 #define DS_TIME_RES 2  /* Resolution of multimedia timer */
  24 #define DS_TIME_DEL 10  /* Delay of multimedia timer callback, and duration of HEL fragment */
  25 /* Default refresh count, can be overridden */
  26 #define FAKE_REFRESH_COUNT (1000/DS_TIME_DEL/2)
  27
  28
  29 #ifdef __WINESRC__
  30
  31 #ifdef __APPLE__
  32 #include <OpenAL/al.h>
  33 #include <OpenAL/alc.h>
  34 #else
  35 #include <AL/al.h>
  36 #include <AL/alc.h>
  37 #endif
  38
  39 #define LONGFMT
  40 #else
  41
  42 #include <al.h>
  43 #include <alc.h>
  44
  45 #include <stdio.h>
  46
  47 extern int LogLevel;
  48
  49 #ifdef DEBUG_INFO
  50 #define TRACE(fmt,args...) do {                                                                      \
  51     if(LogLevel >= 3)                                                                                \
  52         fprintf(stderr, "%04x:trace:dsound:%s " fmt, (UINT)GetCurrentThreadId(), __FUNCTION__, ##args);  \
  53 } while(0)
  54 #define WARN(fmt,args...) do {                                                                       \
  55     if(LogLevel >= 2)                                                                                \
  56         fprintf(stderr, "%04x:warn:dsound:%s " fmt, (UINT)GetCurrentThreadId(), __FUNCTION__, ##args);   \
  57 } while(0)
  58 #define FIXME(fmt,args...) do {                                                                      \
  59     if(LogLevel >= 1)                                                                                \
  60         fprintf(stderr, "%04x:fixme:dsound:%s " fmt, (UINT)GetCurrentThreadId(), __FUNCTION__, ##args);  \
  61 } while(0)
  62 #define ERR(fmt,args...) do {                                                                        \
  63     if(LogLevel >= 0)                                                                                \
  64         fprintf(stderr, "%04x:err:dsound:%s " fmt, (UINT)GetCurrentThreadId(), __FUNCTION__, ##args);    \
  65 } while(0)
  66 #else
  67 #define TRACE(args...)
  68 #define WARN(args...)
  69 #define FIXME(args...)
  70 #define ERR(args...)
  71 #endif
  72
  73 const char *wine_dbg_sprintf( const char *format, ... );
  74 const char *wine_dbgstr_wn( const WCHAR *str, int n );
  75
  76 static inline const char *debugstr_guid( const GUID *id )
  77 {
  78     if (!id) return "(null)";
  79     if (!((ULONG_PTR)id >> 16)) return wine_dbg_sprintf( "<guid-0x%04hx>", (WORD)(ULONG_PTR)id );
  80     return wine_dbg_sprintf( "{%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x}",
  81                              id->Data1, id->Data2, id->Data3,
  82                              id->Data4[0], id->Data4[1], id->Data4[2], id->Data4[3],
  83                              id->Data4[4], id->Data4[5], id->Data4[6], id->Data4[7] );
  84 }
  85
  86 static inline const char *debugstr_w( const WCHAR *s ) { return wine_dbgstr_wn( s, -1 ); }
  87
  88 #define LONGFMT "l"
  89 #endif
  90
  91
  92 #include "alext.h"
  93 #include "eax.h"
  94
  95 /* Set to 1 to build a DLL that can be used in an app that uses OpenAL itself.
  96  * Thread-local contexts are needed for true concurrency, however. Disallowing
  97  * concurrency can avoid a save and restore of the context. */
  98 #define ALLOW_CONCURRENT_AL 0
  99
 100 /* All openal functions */
 101 extern int openal_loaded;
 102 #ifdef SONAME_LIBOPENAL
 103 extern LPALCCREATECONTEXT palcCreateContext;
 104 extern LPALCMAKECONTEXTCURRENT palcMakeContextCurrent;
 105 extern LPALCPROCESSCONTEXT palcProcessContext;
 106 extern LPALCSUSPENDCONTEXT palcSuspendContext;
 107 extern LPALCDESTROYCONTEXT palcDestroyContext;
 108 extern LPALCGETCURRENTCONTEXT palcGetCurrentContext;
 109 extern LPALCGETCONTEXTSDEVICE palcGetContextsDevice;
 110 extern LPALCOPENDEVICE palcOpenDevice;
 111 extern LPALCCLOSEDEVICE palcCloseDevice;
 112 extern LPALCGETERROR palcGetError;
 113 extern LPALCISEXTENSIONPRESENT palcIsExtensionPresent;
 114 extern LPALCGETPROCADDRESS palcGetProcAddress;
 115 extern LPALCGETENUMVALUE palcGetEnumValue;
 116 extern LPALCGETSTRING palcGetString;
 117 extern LPALCGETINTEGERV palcGetIntegerv;
 118 extern LPALCCAPTUREOPENDEVICE palcCaptureOpenDevice;
 119 extern LPALCCAPTURECLOSEDEVICE palcCaptureCloseDevice;
 120 extern LPALCCAPTURESTART palcCaptureStart;
 121 extern LPALCCAPTURESTOP palcCaptureStop;
 122 extern LPALCCAPTURESAMPLES palcCaptureSamples;
 123 extern LPALENABLE palEnable;
 124 extern LPALDISABLE palDisable;
 125 extern LPALISENABLED palIsEnabled;
 126 extern LPALGETSTRING palGetString;
 127 extern LPALGETBOOLEANV palGetBooleanv;
 128 extern LPALGETINTEGERV palGetIntegerv;
 129 extern LPALGETFLOATV palGetFloatv;
 130 extern LPALGETDOUBLEV palGetDoublev;
 131 extern LPALGETBOOLEAN palGetBoolean;
 132 extern LPALGETINTEGER palGetInteger;
 133 extern LPALGETFLOAT palGetFloat;
 134 extern LPALGETDOUBLE palGetDouble;
 135 extern LPALGETERROR palGetError;
 136 extern LPALISEXTENSIONPRESENT palIsExtensionPresent;
 137 extern LPALGETPROCADDRESS palGetProcAddress;
 138 extern LPALGETENUMVALUE palGetEnumValue;
 139 extern LPALLISTENERF palListenerf;
 140 extern LPALLISTENER3F palListener3f;
 141 extern LPALLISTENERFV palListenerfv;
 142 extern LPALLISTENERI palListeneri;
 143 extern LPALLISTENER3I palListener3i;
 144 extern LPALLISTENERIV palListeneriv;
 145 extern LPALGETLISTENERF palGetListenerf;
 146 extern LPALGETLISTENER3F palGetListener3f;
 147 extern LPALGETLISTENERFV palGetListenerfv;
 148 extern LPALGETLISTENERI palGetListeneri;
 149 extern LPALGETLISTENER3I palGetListener3i;
 150 extern LPALGETLISTENERIV palGetListeneriv;
 151 extern LPALGENSOURCES palGenSources;
 152 extern LPALDELETESOURCES palDeleteSources;
 153 extern LPALISSOURCE palIsSource;
 154 extern LPALSOURCEF palSourcef;
 155 extern LPALSOURCE3F palSource3f;
 156 extern LPALSOURCEFV palSourcefv;
 157 extern LPALSOURCEI palSourcei;
 158 extern LPALSOURCE3I palSource3i;
 159 extern LPALSOURCEIV palSourceiv;
 160 extern LPALGETSOURCEF palGetSourcef;
 161 extern LPALGETSOURCE3F palGetSource3f;
 162 extern LPALGETSOURCEFV palGetSourcefv;
 163 extern LPALGETSOURCEI palGetSourcei;
 164 extern LPALGETSOURCE3I palGetSource3i;
 165 extern LPALGETSOURCEIV palGetSourceiv;
 166 extern LPALSOURCEPLAYV palSourcePlayv;
 167 extern LPALSOURCESTOPV palSourceStopv;
 168 extern LPALSOURCEREWINDV palSourceRewindv;
 169 extern LPALSOURCEPAUSEV palSourcePausev;
 170 extern LPALSOURCEPLAY palSourcePlay;
 171 extern LPALSOURCESTOP palSourceStop;
 172 extern LPALSOURCEREWIND palSourceRewind;
 173 extern LPALSOURCEPAUSE palSourcePause;
 174 extern LPALSOURCEQUEUEBUFFERS palSourceQueueBuffers;
 175 extern LPALSOURCEUNQUEUEBUFFERS palSourceUnqueueBuffers;
 176 extern LPALGENBUFFERS palGenBuffers;
 177 extern LPALDELETEBUFFERS palDeleteBuffers;
 178 extern LPALISBUFFER palIsBuffer;
 179 extern LPALBUFFERF palBufferf;
 180 extern LPALBUFFER3F palBuffer3f;
 181 extern LPALBUFFERFV palBufferfv;
 182 extern LPALBUFFERI palBufferi;
 183 extern LPALBUFFER3I palBuffer3i;
 184 extern LPALBUFFERIV palBufferiv;
 185 extern LPALGETBUFFERF palGetBufferf;
 186 extern LPALGETBUFFER3F palGetBuffer3f;
 187 extern LPALGETBUFFERFV palGetBufferfv;
 188 extern LPALGETBUFFERI palGetBufferi;
 189 extern LPALGETBUFFER3I palGetBuffer3i;
 190 extern LPALGETBUFFERIV palGetBufferiv;
 191 extern LPALBUFFERDATA palBufferData;
 192 extern LPALDOPPLERFACTOR palDopplerFactor;
 193 extern LPALDOPPLERVELOCITY palDopplerVelocity;
 194 extern LPALDISTANCEMODEL palDistanceModel;
 195 extern LPALSPEEDOFSOUND palSpeedOfSound;
 196
 197 #define alcCreateContext palcCreateContext
 198 #define alcMakeContextCurrent palcMakeContextCurrent
 199 #define alcProcessContext palcProcessContext
 200 #define alcSuspendContext palcSuspendContext
 201 #define alcDestroyContext palcDestroyContext
 202 #define alcGetCurrentContext palcGetCurrentContext
 203 #define alcGetContextsDevice palcGetContextsDevice
 204 #define alcOpenDevice palcOpenDevice
 205 #define alcCloseDevice palcCloseDevice
 206 #define alcGetError palcGetError
 207 #define alcIsExtensionPresent palcIsExtensionPresent
 208 #define alcGetProcAddress palcGetProcAddress
 209 #define alcGetEnumValue palcGetEnumValue
 210 #define alcGetString palcGetString
 211 #define alcGetIntegerv palcGetIntegerv
 212 #define alcCaptureOpenDevice palcCaptureOpenDevice
 213 #define alcCaptureCloseDevice palcCaptureCloseDevice
 214 #define alcCaptureStart palcCaptureStart
 215 #define alcCaptureStop palcCaptureStop
 216 #define alcCaptureSamples palcCaptureSamples
 217 #define alEnable palEnable
 218 #define alDisable palDisable
 219 #define alIsEnabled palIsEnabled
 220 #define alGetString palGetString
 221 #define alGetBooleanv palGetBooleanv
 222 #define alGetIntegerv palGetIntegerv
 223 #define alGetFloatv palGetFloatv
 224 #define alGetDoublev palGetDoublev
 225 #define alGetBoolean palGetBoolean
 226 #define alGetInteger palGetInteger
 227 #define alGetFloat palGetFloat
 228 #define alGetDouble palGetDouble
 229 #define alGetError palGetError
 230 #define alIsExtensionPresent palIsExtensionPresent
 231 #define alGetProcAddress palGetProcAddress
 232 #define alGetEnumValue palGetEnumValue
 233 #define alListenerf palListenerf
 234 #define alListener3f palListener3f
 235 #define alListenerfv palListenerfv
 236 #define alListeneri palListeneri
 237 #define alListener3i palListener3i
 238 #define alListeneriv palListeneriv
 239 #define alGetListenerf palGetListenerf
 240 #define alGetListener3f palGetListener3f
 241 #define alGetListenerfv palGetListenerfv
 242 #define alGetListeneri palGetListeneri
 243 #define alGetListener3i palGetListener3i
 244 #define alGetListeneriv palGetListeneriv
 245 #define alGenSources palGenSources
 246 #define alDeleteSources palDeleteSources
 247 #define alIsSource palIsSource
 248 #define alSourcef palSourcef
 249 #define alSource3f palSource3f
 250 #define alSourcefv palSourcefv
 251 #define alSourcei palSourcei
 252 #define alSource3i palSource3i
 253 #define alSourceiv palSourceiv
 254 #define alGetSourcef palGetSourcef
 255 #define alGetSource3f palGetSource3f
 256 #define alGetSourcefv palGetSourcefv
 257 #define alGetSourcei palGetSourcei
 258 #define alGetSource3i palGetSource3i
 259 #define alGetSourceiv palGetSourceiv
 260 #define alSourcePlayv palSourcePlayv
 261 #define alSourceStopv palSourceStopv
 262 #define alSourceRewindv palSourceRewindv
 263 #define alSourcePausev palSourcePausev
 264 #define alSourcePlay palSourcePlay
 265 #define alSourceStop palSourceStop
 266 #define alSourceRewind palSourceRewind
 267 #define alSourcePause palSourcePause
 268 #define alSourceQueueBuffers palSourceQueueBuffers
 269 #define alSourceUnqueueBuffers palSourceUnqueueBuffers
 270 #define alGenBuffers palGenBuffers
 271 #define alDeleteBuffers palDeleteBuffers
 272 #define alIsBuffer palIsBuffer
 273 #define alBufferf palBufferf
 274 #define alBuffer3f palBuffer3f
 275 #define alBufferfv palBufferfv
 276 #define alBufferi palBufferi
 277 #define alBuffer3i palBuffer3i
 278 #define alBufferiv palBufferiv
 279 #define alGetBufferf palGetBufferf
 280 #define alGetBuffer3f palGetBuffer3f
 281 #define alGetBufferfv palGetBufferfv
 282 #define alGetBufferi palGetBufferi
 283 #define alGetBuffer3i palGetBuffer3i
 284 #define alGetBufferiv palGetBufferiv
 285 #define alBufferData palBufferData
 286 #define alDopplerFactor palDopplerFactor
 287 #define alDopplerVelocity palDopplerVelocity
 288 #define alDistanceModel palDistanceModel
 289 #define alSpeedOfSound palSpeedOfSound
 290 #endif
 291
 292 #include <math.h>
 293 #include "wingdi.h"
 294 #include "mmreg.h"
 295
 296 /* OpenAL only allows for 1 single access to the device at the same time */
 297 extern CRITICAL_SECTION openal_crst;
 298
 299 extern const ALCchar *DSOUND_getdevicestrings(void);
 300 extern const ALCchar *DSOUND_getcapturedevicestrings(void);
 301
 302 extern LPALCMAKECONTEXTCURRENT set_context;
 303 extern LPALCGETCURRENTCONTEXT get_context;
 304 extern BOOL local_contexts;
 305
 306 /* Device implementation */
 307 typedef struct DS8Primary DS8Primary;
 308 typedef struct DS8Buffer DS8Buffer;
 309
 310 typedef struct DS8Impl
 311 {
 312     IDirectSound8 IDirectSound8_iface;
 313     IDirectSound IDirectSound_iface;
 314
 315     LONG ref;
 316     BOOL is_8;
 317
 318     LONG *deviceref;
 319     ALCdevice *device;
 320     DS8Primary *primary;
 321
 322     DWORD speaker_config;
 323     DWORD prio_level;
 324     GUID guid;
 325 } DS8Impl;
 326
 327 /* Sample types */
 328 #define AL_BYTE                                  0x1400
 329 #define AL_UNSIGNED_BYTE                         0x1401
 330 #define AL_SHORT                                 0x1402
 331 #define AL_UNSIGNED_SHORT                        0x1403
 332 #define AL_INT                                   0x1404
 333 #define AL_UNSIGNED_INT                          0x1405
 334 #define AL_FLOAT                                 0x1406
 335 #define AL_DOUBLE                                0x1407
 336 #define AL_BYTE3                                 0x1408
 337 #define AL_UNSIGNED_BYTE3                        0x1409
 338 #define AL_MULAW                                 0x1410
 339 #define AL_IMA4                                  0x1411
 340
 341 /* Channel configurations */
 342 #define AL_MONO                                  0x1500
 343 #define AL_STEREO                                0x1501
 344 #define AL_REAR                                  0x1502
 345 #define AL_QUAD                                  0x1503
 346 #define AL_5POINT1                               0x1504 /* (WFX order) */
 347 #define AL_6POINT1                               0x1505 /* (WFX order) */
 348 #define AL_7POINT1                               0x1506 /* (WFX order) */
 349
 350 /* Storage formats */
 351 #define AL_MONO8                                 0x1100
 352 #define AL_MONO16                                0x1101
 353 #define AL_MONO32F                               0x10010
 354 #define AL_STEREO8                               0x1102
 355 #define AL_STEREO16                              0x1103
 356 #define AL_STEREO32F                             0x10011
 357 #define AL_QUAD8                                 0x1204
 358 #define AL_QUAD16                                0x1205
 359 #define AL_QUAD32F                               0x1206
 360 #define AL_REAR8                                 0x1207
 361 #define AL_REAR16                                0x1208
 362 #define AL_REAR32F                               0x1209
 363 #define AL_5POINT1_8                             0x120A
 364 #define AL_5POINT1_16                            0x120B
 365 #define AL_5POINT1_32F                           0x120C
 366 #define AL_6POINT1_8                             0x120D
 367 #define AL_6POINT1_16                            0x120E
 368 #define AL_6POINT1_32F                           0x120F
 369 #define AL_7POINT1_8                             0x1210
 370 #define AL_7POINT1_16                            0x1211
 371 #define AL_7POINT1_32F                           0x1212
 372
 373 enum {
 374     EXT_EFX,
 375     EXT_FLOAT32,
 376     EXT_MCFORMATS,
 377     EXT_STATIC_BUFFER,
 378     SOFT_BUFFER_SAMPLES,
 379     SOFT_BUFFER_SUB_DATA,
 380     SOFT_DEFERRED_UPDATES,
 381
 382     MAX_EXTENSIONS
 383 };
 384
 385 typedef struct ExtALFuncs
 386 {
 387     PFNALBUFFERSUBDATASOFTPROC BufferSubData;
 388     PFNALBUFFERDATASTATICPROC BufferDataStatic;
 389
 390     LPALGENEFFECTS GenEffects;
 391     LPALDELETEEFFECTS DeleteEffects;
 392     LPALEFFECTI Effecti;
 393     LPALEFFECTF Effectf;
 394
 395     LPALGENAUXILIARYEFFECTSLOTS GenAuxiliaryEffectSlots;
 396     LPALDELETEAUXILIARYEFFECTSLOTS DeleteAuxiliaryEffectSlots;
 397     LPALAUXILIARYEFFECTSLOTI AuxiliaryEffectSloti;
 398
 399     void (AL_APIENTRY*BufferSamplesSOFT)(ALuint,ALuint,ALenum,ALsizei,ALenum,ALenum,const ALvoid*);
 400     void (AL_APIENTRY*BufferSubSamplesSOFT)(ALuint,ALsizei,ALsizei,ALenum,ALenum,const ALvoid*);
 401     void (AL_APIENTRY*GetBufferSamplesSOFT)(ALuint,ALsizei,ALsizei,ALenum,ALenum,ALvoid*);
 402     ALboolean (AL_APIENTRY*IsBufferFormatSupportedSOFT)(ALenum);
 403
 404     void (AL_APIENTRY*DeferUpdates)(void);
 405     void (AL_APIENTRY*ProcessUpdates)(void);
 406 } ExtALFuncs;
 407
 408 struct DS8Primary
 409 {
 410     IDirectSoundBuffer IDirectSoundBuffer_iface;
 411     IDirectSound3DListener IDirectSound3DListener_iface;
 412     IKsPropertySet IKsPropertySet_iface;
 413
 414     LONG ref, ds3d_ref, prop_ref;
 415     IDirectSoundBuffer8 *write_emu;
 416     DS8Impl *parent;
 417
 418     CRITICAL_SECTION crst;
 419
 420     DWORD buf_size;
 421     BOOL stopped;
 422     DWORD flags;
 423     WAVEFORMATEXTENSIBLE format;
 424     ALCcontext *ctx;
 425
 426     ALboolean SupportedExt[MAX_EXTENSIONS];
 427
 428     ALuint *sources;
 429     DWORD nsources, sizesources;
 430     DWORD max_sources;
 431     DS8Buffer **buffers;
 432     DWORD nbuffers, sizebuffers;
 433     DS8Buffer **notifies;
 434     DWORD nnotifies, sizenotifies;
 435
 436     UINT timer_id;
 437     DWORD timer_res;
 438     HANDLE thread_hdl;
 439     DWORD thread_id;
 440
 441     ALuint auxslot;
 442     ALuint effect;
 443     EAXLISTENERPROPERTIES eax_prop;
 444
 445     ExtALFuncs ExtAL;
 446     union {
 447         struct {
 448             BOOL pos : 1;
 449             BOOL vel : 1;
 450             BOOL orientation : 1;
 451             BOOL distancefactor : 1;
 452             BOOL rollofffactor : 1;
 453             BOOL dopplerfactor : 1;
 454             BOOL effect : 1;
 455         } bit;
 456         int flags;
 457     } dirty;
 458     ALfloat rollofffactor;
 459     DS3DLISTENER listen;
 460 };
 461
 462
 463 typedef struct DS8Data {
 464     LONG ref;
 465
 466     /* Lock was called and unlock isn't? */
 467     LONG locked;
 468
 469     WAVEFORMATEXTENSIBLE format;
 470
 471     ALuint buf_size;
 472     ALenum buf_format;
 473     ALenum in_type, in_chans;
 474     DWORD dsbflags;
 475     BYTE *data;
 476     ALuint *buffers;
 477     ALuint numsegs;
 478     ALuint segsize;
 479     ALuint lastsegsize;
 480 } DS8Data;
 481 /* Amount of buffers that have to be queued when
 482  * bufferdatastatic and buffersubdata are not available */
 483 #define QBUFFERS 3
 484
 485 struct DS8Buffer
 486 {
 487     IDirectSoundBuffer8 IDirectSoundBuffer8_iface;
 488     IDirectSoundBuffer IDirectSoundBuffer_iface;
 489     IDirectSound3DBuffer IDirectSound3DBuffer_iface;
 490     IDirectSoundNotify IDirectSoundNotify_iface;
 491     IKsPropertySet IKsPropertySet_iface;
 492
 493     LONG ref, ds3d_ref, not_ref, prop_ref;
 494     LONG all_ref;
 495
 496     DWORD ds3dmode;
 497     DS8Primary *primary;
 498     DS8Data *buffer;
 499     ALuint source;
 500     ALuint curidx;
 501     BOOL isplaying, islooping, bufferlost;
 502     ALCcontext *ctx;
 503     ExtALFuncs *ExtAL;
 504     CRITICAL_SECTION *crst;
 505
 506     DS3DBUFFER ds3dbuffer;
 507     union {
 508         struct {
 509             BOOL pos : 1;
 510             BOOL vel : 1;
 511             BOOL cone_angles : 1;
 512             BOOL cone_orient : 1;
 513             BOOL cone_outsidevolume : 1;
 514             BOOL min_distance : 1;
 515             BOOL max_distance : 1;
 516             BOOL mode : 1;
 517         } bit;
 518         int flags;
 519     } dirty;
 520
 521     DWORD nnotify, lastpos;
 522     DSBPOSITIONNOTIFY *notify;
 523 };
 524
 525 extern HRESULT DS8Primary_Create(DS8Primary **prim, DS8Impl *parent);
 526 extern void DS8Primary_Destroy(DS8Primary *prim);
 527
 528 extern HRESULT DS8Buffer_Create(DS8Buffer **ppv, DS8Primary *parent, IDirectSoundBuffer *orig);
 529 extern void DS8Buffer_Destroy(DS8Buffer *buf);
 530
 531 static inline ALdouble gain_to_mB(ALdouble gain)
 532 {
 533     return log10(gain) * 2000.0;
 534 }
 535 static inline ALdouble mB_to_gain(ALdouble millibels)
 536 {
 537     return pow(10.0, millibels/2000.0);
 538 }
 539
 540 static inline LONG clampI(LONG val, LONG minval, LONG maxval)
 541 {
 542     if(val >= maxval) return maxval;
 543     if(val <= minval) return minval;
 544     return val;
 545 }
 546 static inline ULONG clampU(ULONG val, ULONG minval, ULONG maxval)
 547 {
 548     if(val >= maxval) return maxval;
 549     if(val <= minval) return minval;
 550     return val;
 551 }
 552 static inline FLOAT clampF(FLOAT val, FLOAT minval, FLOAT maxval)
 553 {
 554     if(val >= maxval) return maxval;
 555     if(val <= minval) return minval;
 556     return val;
 557 }
 558
 559
 560 #define getALError() \
 561 do { \
 562     ALenum err = alGetError(); \
 563     if(err != AL_NO_ERROR) \
 564         ERR(">>>>>>>>>>>> Received AL error %#x on context %p, %s:%u\n", err, get_context(), __FUNCTION__, __LINE__); \
 565 } while (0)
 566
 567 #define getALCError(dev) \
 568 do { \
 569     ALenum err = alcGetError(dev); \
 570     if(err != ALC_NO_ERROR) \
 571         ERR(">>>>>>>>>>>> Received ALC error %#x on device %p, %s:%u\n", err, dev, __FUNCTION__, __LINE__); \
 572 } while(0)
 573
 574 #if ALLOW_CONCURRENT_AL
 575
 576 #define setALContext(actx) \
 577     do { \
 578         ALCcontext *__old_ctx, *cur_ctx = actx; \
 579         if (!local_contexts) EnterCriticalSection(&openal_crst); \
 580         __old_ctx = get_context(); \
 581         if (__old_ctx != cur_ctx && set_context(cur_ctx) == ALC_FALSE) {\
 582             ERR("Couldn't set current context!!\n"); \
 583             getALCError(alcGetContextsDevice(cur_ctx)); \
 584         }
 585
 586 /* Only restore a NULL context if using global contexts, for TLS contexts always restore */
 587 #define popALContext() \
 588         if (__old_ctx != cur_ctx && \
 589             (local_contexts || __old_ctx) && \
 590             set_context(__old_ctx) == ALC_FALSE) { \
 591             ERR("Couldn't restore old context!!\n"); \
 592             getALCError(alcGetContextsDevice(__old_ctx)); \
 593         } \
 594         if (!local_contexts) LeaveCriticalSection(&openal_crst); \
 595     } while (0)
 596
 597 #else
 598
 599 #define setALContext(actx) \
 600     do { \
 601         ALCcontext *cur_ctx = actx; \
 602         if (!local_contexts) EnterCriticalSection(&openal_crst); \
 603         if (set_context(cur_ctx) == ALC_FALSE) { \
 604             ERR("Couldn't set current context!!\n"); \
 605             getALCError(alcGetContextsDevice(cur_ctx)); \
 606         }
 607
 608 #define popALContext() \
 609         if (!local_contexts) LeaveCriticalSection(&openal_crst); \
 610     } while (0)
 611
 612 #endif
 613
 614 HRESULT DSOUND_Create(REFIID riid, void **ppDS);
 615 HRESULT DSOUND_Create8(REFIID riid, void **ppDS);
 616 HRESULT DSOUND_FullDuplexCreate(REFIID riid, void **ppDSFD);
 617 HRESULT IKsPrivatePropertySetImpl_Create(REFIID riid, void **piks);
 618 HRESULT DSOUND_CaptureCreate(REFIID riid, void **ppDSC);
 619 HRESULT DSOUND_CaptureCreate8(REFIID riid, void **ppDSC8);
 620
 621 extern const GUID DSOUND_renderer_guid;
 622 extern const GUID DSOUND_capture_guid;