OpenAL32/Include/alMain.h

   1 #ifndef AL_MAIN_H
   2 #define AL_MAIN_H
   3
   4 #include <string.h>
   5 #include <stdio.h>
   6 #include <stdarg.h>
   7 #include <assert.h>
   8
   9 #ifdef HAVE_FENV_H
  10 #include <fenv.h>
  11 #endif
  12
  13 #ifdef HAVE_FPU_CONTROL_H
  14 #include <fpu_control.h>
  15 #endif
  16
  17 #include "AL/al.h"
  18 #include "AL/alc.h"
  19 #include "AL/alext.h"
  20
  21 #ifndef AL_SOFT_deferred_updates
  22 #define AL_SOFT_deferred_updates 1
  23 #define AL_DEFERRED_UPDATES_SOFT                 0xC002
  24 typedef ALvoid (AL_APIENTRY*LPALDEFERUPDATESSOFT)(void);
  25 typedef ALvoid (AL_APIENTRY*LPALPROCESSUPDATESSOFT)(void);
  26 #ifdef AL_ALEXT_PROTOTYPES
  27 AL_API ALvoid AL_APIENTRY alDeferUpdatesSOFT(void);
  28 AL_API ALvoid AL_APIENTRY alProcessUpdatesSOFT(void);
  29 #endif
  30 #endif
  31
  32
  33 #if defined(HAVE_STDINT_H)
  34 #include <stdint.h>
  35 typedef int64_t ALint64;
  36 typedef uint64_t ALuint64;
  37 #elif defined(HAVE___INT64)
  38 typedef __int64 ALint64;
  39 typedef unsigned __int64 ALuint64;
  40 #elif (SIZEOF_LONG == 8)
  41 typedef long ALint64;
  42 typedef unsigned long ALuint64;
  43 #elif (SIZEOF_LONG_LONG == 8)
  44 typedef long long ALint64;
  45 typedef unsigned long long ALuint64;
  46 #endif
  47
  48 typedef ptrdiff_t ALintptrEXT;
  49 typedef ptrdiff_t ALsizeiptrEXT;
  50
  51 #ifdef HAVE_GCC_FORMAT
  52 #define PRINTF_STYLE(x, y) __attribute__((format(printf, (x), (y))))
  53 #else
  54 #define PRINTF_STYLE(x, y)
  55 #endif
  56
  57 #if defined(HAVE_RESTRICT)
  58 #define RESTRICT restrict
  59 #elif defined(HAVE___RESTRICT)
  60 #define RESTRICT __restrict
  61 #else
  62 #define RESTRICT
  63 #endif
  64
  65
  66 static const union {
  67     ALuint u;
  68     ALubyte b[sizeof(ALuint)];
  69 } EndianTest = { 1 };
  70 #define IS_LITTLE_ENDIAN (EndianTest.b[0] == 1)
  71
  72 #define COUNTOF(x) (sizeof((x))/sizeof((x)[0]))
  73
  74 #ifdef _WIN32
  75
  76 #include <windows.h>
  77
  78 typedef DWORD pthread_key_t;
  79 int pthread_key_create(pthread_key_t *key, void (*callback)(void*));
  80 int pthread_key_delete(pthread_key_t key);
  81 void *pthread_getspecific(pthread_key_t key);
  82 int pthread_setspecific(pthread_key_t key, void *val);
  83
  84 #define HAVE_DYNLOAD 1
  85 void *LoadLib(const char *name);
  86 void CloseLib(void *handle);
  87 void *GetSymbol(void *handle, const char *name);
  88
  89 WCHAR *strdupW(const WCHAR *str);
  90
  91 typedef LONG pthread_once_t;
  92 #define PTHREAD_ONCE_INIT 0
  93 void pthread_once(pthread_once_t *once, void (*callback)(void));
  94
  95 static __inline int sched_yield(void)
  96 { SwitchToThread(); return 0; }
  97
  98 #else
  99
 100 #include <unistd.h>
 101 #include <assert.h>
 102 #include <pthread.h>
 103 #ifdef HAVE_PTHREAD_NP_H
 104 #include <pthread_np.h>
 105 #endif
 106 #include <sys/time.h>
 107 #include <time.h>
 108 #include <errno.h>
 109
 110 #define IsBadWritePtr(a,b) ((a) == NULL && (b) != 0)
 111
 112 typedef pthread_mutex_t CRITICAL_SECTION;
 113 void InitializeCriticalSection(CRITICAL_SECTION *cs);
 114 void DeleteCriticalSection(CRITICAL_SECTION *cs);
 115 void EnterCriticalSection(CRITICAL_SECTION *cs);
 116 void LeaveCriticalSection(CRITICAL_SECTION *cs);
 117
 118 ALuint timeGetTime(void);
 119 void Sleep(ALuint t);
 120
 121 #if defined(HAVE_DLFCN_H)
 122 #define HAVE_DYNLOAD 1
 123 void *LoadLib(const char *name);
 124 void CloseLib(void *handle);
 125 void *GetSymbol(void *handle, const char *name);
 126 #endif
 127
 128 #endif
 129
 130 typedef void *volatile XchgPtr;
 131
 132 #if defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1))
 133 typedef ALuint RefCount;
 134 static __inline RefCount IncrementRef(volatile RefCount *ptr)
 135 { return __sync_add_and_fetch(ptr, 1); }
 136 static __inline RefCount DecrementRef(volatile RefCount *ptr)
 137 { return __sync_sub_and_fetch(ptr, 1); }
 138
 139 static __inline int ExchangeInt(volatile int *ptr, int newval)
 140 {
 141     return __sync_lock_test_and_set(ptr, newval);
 142 }
 143 static __inline void *ExchangePtr(XchgPtr *ptr, void *newval)
 144 {
 145     return __sync_lock_test_and_set(ptr, newval);
 146 }
 147 static __inline ALboolean CompExchangeInt(volatile int *ptr, int oldval, int newval)
 148 {
 149     return __sync_bool_compare_and_swap(ptr, oldval, newval);
 150 }
 151 static __inline ALboolean CompExchangePtr(XchgPtr *ptr, void *oldval, void *newval)
 152 {
 153     return __sync_bool_compare_and_swap(ptr, oldval, newval);
 154 }
 155
 156 #elif defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
 157
 158 static __inline int xaddl(volatile int *dest, int incr)
 159 {
 160     int ret;
 161     __asm__ __volatile__("lock; xaddl %0,(%1)"
 162                          : "=r" (ret)
 163                          : "r" (dest), "0" (incr)
 164                          : "memory");
 165     return ret;
 166 }
 167
 168 typedef int RefCount;
 169 static __inline RefCount IncrementRef(volatile RefCount *ptr)
 170 { return xaddl(ptr, 1)+1; }
 171 static __inline RefCount DecrementRef(volatile RefCount *ptr)
 172 { return xaddl(ptr, -1)-1; }
 173
 174 static __inline int ExchangeInt(volatile int *dest, int newval)
 175 {
 176     int ret;
 177     __asm__ __volatile__("lock; xchgl %0,(%1)"
 178                          : "=r" (ret)
 179                          : "r" (dest), "0" (newval)
 180                          : "memory");
 181     return ret;
 182 }
 183
 184 static __inline ALboolean CompExchangeInt(volatile int *dest, int oldval, int newval)
 185 {
 186     int ret;
 187     __asm__ __volatile__("lock; cmpxchgl %2,(%1)"
 188                          : "=a" (ret)
 189                          : "r" (dest), "r" (newval), "0" (oldval)
 190                          : "memory");
 191     return ret == oldval;
 192 }
 193
 194 static __inline void *ExchangePtr(XchgPtr *dest, void *newval)
 195 {
 196     void *ret;
 197     __asm__ __volatile__(
 198 #ifdef __i386__
 199                          "lock; xchgl %0,(%1)"
 200 #else
 201                          "lock; xchgq %0,(%1)"
 202 #endif
 203                          : "=r" (ret)
 204                          : "r" (dest), "0" (newval)
 205                          : "memory"
 206     );
 207     return ret;
 208 }
 209
 210 static __inline ALboolean CompExchangePtr(XchgPtr *dest, void *oldval, void *newval)
 211 {
 212     void *ret;
 213     __asm__ __volatile__(
 214 #ifdef __i386__
 215                          "lock; cmpxchgl %2,(%1)"
 216 #else
 217                          "lock; cmpxchgq %2,(%1)"
 218 #endif
 219                          : "=a" (ret)
 220                          : "r" (dest), "r" (newval), "0" (oldval)
 221                          : "memory"
 222     );
 223     return ret == oldval;
 224 }
 225
 226 #elif defined(_WIN32)
 227
 228 typedef LONG RefCount;
 229 static __inline RefCount IncrementRef(volatile RefCount *ptr)
 230 { return InterlockedIncrement(ptr); }
 231 static __inline RefCount DecrementRef(volatile RefCount *ptr)
 232 { return InterlockedDecrement(ptr); }
 233
 234 extern ALbyte LONG_size_does_not_match_int[(sizeof(LONG)==sizeof(int))?1:-1];
 235
 236 static __inline int ExchangeInt(volatile int *ptr, int newval)
 237 {
 238     union {
 239         volatile int *i;
 240         volatile LONG *l;
 241     } u = { ptr };
 242     return InterlockedExchange(u.l, newval);
 243 }
 244 static __inline void *ExchangePtr(XchgPtr *ptr, void *newval)
 245 {
 246     return InterlockedExchangePointer(ptr, newval);
 247 }
 248 static __inline ALboolean CompExchangeInt(volatile int *ptr, int oldval, int newval)
 249 {
 250     union {
 251         volatile int *i;
 252         volatile LONG *l;
 253     } u = { ptr };
 254     return InterlockedCompareExchange(u.l, newval, oldval) == oldval;
 255 }
 256 static __inline ALboolean CompExchangePtr(XchgPtr *ptr, void *oldval, void *newval)
 257 {
 258     return InterlockedCompareExchangePointer(ptr, newval, oldval) == oldval;
 259 }
 260
 261 #elif defined(__APPLE__)
 262
 263 #include <libkern/OSAtomic.h>
 264
 265 typedef int32_t RefCount;
 266 static __inline RefCount IncrementRef(volatile RefCount *ptr)
 267 { return OSAtomicIncrement32Barrier(ptr); }
 268 static __inline RefCount DecrementRef(volatile RefCount *ptr)
 269 { return OSAtomicDecrement32Barrier(ptr); }
 270
 271 static __inline int ExchangeInt(volatile int *ptr, int newval)
 272 {
 273     /* Really? No regular old atomic swap? */
 274     int oldval;
 275     do {
 276         oldval = *ptr;
 277     } while(!OSAtomicCompareAndSwap32Barrier(oldval, newval, ptr));
 278     return oldval;
 279 }
 280 static __inline void *ExchangePtr(XchgPtr *ptr, void *newval)
 281 {
 282     void *oldval;
 283     do {
 284         oldval = *ptr;
 285     } while(!OSAtomicCompareAndSwapPtrBarrier(oldval, newval, ptr));
 286     return oldval;
 287 }
 288 static __inline ALboolean CompExchangeInt(volatile int *ptr, int oldval, int newval)
 289 {
 290     return OSAtomicCompareAndSwap32Barrier(oldval, newval, ptr);
 291 }
 292 static __inline ALboolean CompExchangePtr(XchgPtr *ptr, void *oldval, void *newval)
 293 {
 294     return OSAtomicCompareAndSwapPtrBarrier(oldval, newval, ptr);
 295 }
 296
 297 #else
 298 #error "No atomic functions available on this platform!"
 299 typedef ALuint RefCount;
 300 #endif
 301
 302
 303 typedef struct {
 304     volatile RefCount read_count;
 305     volatile RefCount write_count;
 306     volatile ALenum read_lock;
 307     volatile ALenum read_entry_lock;
 308     volatile ALenum write_lock;
 309 } RWLock;
 310
 311 void RWLockInit(RWLock *lock);
 312 void ReadLock(RWLock *lock);
 313 void ReadUnlock(RWLock *lock);
 314 void WriteLock(RWLock *lock);
 315 void WriteUnlock(RWLock *lock);
 316
 317
 318 typedef struct UIntMap {
 319     struct {
 320         ALuint key;
 321         ALvoid *value;
 322     } *array;
 323     ALsizei size;
 324     ALsizei maxsize;
 325     ALsizei limit;
 326     RWLock lock;
 327 } UIntMap;
 328 extern UIntMap TlsDestructor;
 329
 330 void InitUIntMap(UIntMap *map, ALsizei limit);
 331 void ResetUIntMap(UIntMap *map);
 332 ALenum InsertUIntMapEntry(UIntMap *map, ALuint key, ALvoid *value);
 333 ALvoid *RemoveUIntMapKey(UIntMap *map, ALuint key);
 334 ALvoid *LookupUIntMapKey(UIntMap *map, ALuint key);
 335
 336 static __inline void LockUIntMapRead(UIntMap *map)
 337 { ReadLock(&map->lock); }
 338 static __inline void UnlockUIntMapRead(UIntMap *map)
 339 { ReadUnlock(&map->lock); }
 340 static __inline void LockUIntMapWrite(UIntMap *map)
 341 { WriteLock(&map->lock); }
 342 static __inline void UnlockUIntMapWrite(UIntMap *map)
 343 { WriteUnlock(&map->lock); }
 344
 345 #include "alListener.h"
 346 #include "alu.h"
 347
 348 #ifdef __cplusplus
 349 extern "C" {
 350 #endif
 351
 352
 353 #define DEFAULT_OUTPUT_RATE        (44100)
 354 #define MIN_OUTPUT_RATE            (8000)
 355
 356 #define SPEEDOFSOUNDMETRESPERSEC   (343.3f)
 357 #define AIRABSORBGAINHF            (0.99426f) /* -0.05dB */
 358
 359 #define LOWPASSFREQREF             (5000)
 360
 361
 362 struct Hrtf;
 363
 364
 365 // Find the next power-of-2 for non-power-of-2 numbers.
 366 static __inline ALuint NextPowerOf2(ALuint value)
 367 {
 368     ALuint powerOf2 = 1;
 369
 370     if(value)
 371     {
 372         value--;
 373         while(value)
 374         {
 375             value >>= 1;
 376             powerOf2 <<= 1;
 377         }
 378     }
 379     return powerOf2;
 380 }
 381
 382 /* Fast float-to-int conversion. Assumes the FPU is already in round-to-zero
 383  * mode. */
 384 static __inline ALint fastf2i(ALfloat f)
 385 {
 386     ALint i;
 387 #if defined(_MSC_VER) && defined(_M_IX86)
 388     __asm fld f
 389     __asm fistp i
 390 #elif defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
 391     __asm__ __volatile__("flds %1\n\t"
 392                          "fistpl %0\n\t"
 393                          : "=m" (i)
 394                          : "m" (f));
 395 #else
 396     i = (ALint)f;
 397 #endif
 398     return i;
 399 }
 400
 401 /* Fast float-to-uint conversion. Assumes the FPU is already in round-to-zero
 402  * mode. */
 403 static __inline ALuint fastf2u(ALfloat f)
 404 { return fastf2i(f); }
 405
 406
 407 enum DevProbe {
 408     ALL_DEVICE_PROBE,
 409     CAPTURE_DEVICE_PROBE
 410 };
 411
 412 typedef struct {
 413     ALCenum (*OpenPlayback)(ALCdevice*, const ALCchar*);
 414     void (*ClosePlayback)(ALCdevice*);
 415     ALCboolean (*ResetPlayback)(ALCdevice*);
 416     ALCboolean (*StartPlayback)(ALCdevice*);
 417     void (*StopPlayback)(ALCdevice*);
 418
 419     ALCenum (*OpenCapture)(ALCdevice*, const ALCchar*);
 420     void (*CloseCapture)(ALCdevice*);
 421     void (*StartCapture)(ALCdevice*);
 422     void (*StopCapture)(ALCdevice*);
 423     ALCenum (*CaptureSamples)(ALCdevice*, void*, ALCuint);
 424     ALCuint (*AvailableSamples)(ALCdevice*);
 425 } BackendFuncs;
 426
 427 struct BackendInfo {
 428     const char *name;
 429     ALCboolean (*Init)(BackendFuncs*);
 430     void (*Deinit)(void);
 431     void (*Probe)(enum DevProbe);
 432     BackendFuncs Funcs;
 433 };
 434
 435 ALCboolean alc_alsa_init(BackendFuncs *func_list);
 436 void alc_alsa_deinit(void);
 437 void alc_alsa_probe(enum DevProbe type);
 438 ALCboolean alc_oss_init(BackendFuncs *func_list);
 439 void alc_oss_deinit(void);
 440 void alc_oss_probe(enum DevProbe type);
 441 ALCboolean alc_solaris_init(BackendFuncs *func_list);
 442 void alc_solaris_deinit(void);
 443 void alc_solaris_probe(enum DevProbe type);
 444 ALCboolean alc_sndio_init(BackendFuncs *func_list);
 445 void alc_sndio_deinit(void);
 446 void alc_sndio_probe(enum DevProbe type);
 447 ALCboolean alcMMDevApiInit(BackendFuncs *func_list);
 448 void alcMMDevApiDeinit(void);
 449 void alcMMDevApiProbe(enum DevProbe type);
 450 ALCboolean alcDSoundInit(BackendFuncs *func_list);
 451 void alcDSoundDeinit(void);
 452 void alcDSoundProbe(enum DevProbe type);
 453 ALCboolean alcWinMMInit(BackendFuncs *FuncList);
 454 void alcWinMMDeinit(void);
 455 void alcWinMMProbe(enum DevProbe type);
 456 ALCboolean alc_pa_init(BackendFuncs *func_list);
 457 void alc_pa_deinit(void);
 458 void alc_pa_probe(enum DevProbe type);
 459 ALCboolean alc_wave_init(BackendFuncs *func_list);
 460 void alc_wave_deinit(void);
 461 void alc_wave_probe(enum DevProbe type);
 462 ALCboolean alc_pulse_init(BackendFuncs *func_list);
 463 void alc_pulse_deinit(void);
 464 void alc_pulse_probe(enum DevProbe type);
 465 ALCboolean alc_ca_init(BackendFuncs *func_list);
 466 void alc_ca_deinit(void);
 467 void alc_ca_probe(enum DevProbe type);
 468 ALCboolean alc_opensl_init(BackendFuncs *func_list);
 469 void alc_opensl_deinit(void);
 470 void alc_opensl_probe(enum DevProbe type);
 471 ALCboolean alc_null_init(BackendFuncs *func_list);
 472 void alc_null_deinit(void);
 473 void alc_null_probe(enum DevProbe type);
 474 ALCboolean alc_loopback_init(BackendFuncs *func_list);
 475 void alc_loopback_deinit(void);
 476 void alc_loopback_probe(enum DevProbe type);
 477
 478
 479 /* Device formats */
 480 enum DevFmtType {
 481     DevFmtByte   = ALC_BYTE_SOFT,
 482     DevFmtUByte  = ALC_UNSIGNED_BYTE_SOFT,
 483     DevFmtShort  = ALC_SHORT_SOFT,
 484     DevFmtUShort = ALC_UNSIGNED_SHORT_SOFT,
 485     DevFmtInt    = ALC_INT_SOFT,
 486     DevFmtUInt   = ALC_UNSIGNED_INT_SOFT,
 487     DevFmtFloat  = ALC_FLOAT_SOFT,
 488
 489     DevFmtTypeDefault = DevFmtFloat
 490 };
 491 enum DevFmtChannels {
 492     DevFmtMono   = ALC_MONO_SOFT,
 493     DevFmtStereo = ALC_STEREO_SOFT,
 494     DevFmtQuad   = ALC_QUAD_SOFT,
 495     DevFmtX51    = ALC_5POINT1_SOFT,
 496     DevFmtX61    = ALC_6POINT1_SOFT,
 497     DevFmtX71    = ALC_7POINT1_SOFT,
 498
 499     /* Similar to 5.1, except using the side channels instead of back */
 500     DevFmtX51Side = 0x80000000,
 501
 502     DevFmtChannelsDefault = DevFmtStereo
 503 };
 504
 505 ALuint BytesFromDevFmt(enum DevFmtType type);
 506 ALuint ChannelsFromDevFmt(enum DevFmtChannels chans);
 507 static __inline ALuint FrameSizeFromDevFmt(enum DevFmtChannels chans,
 508                                            enum DevFmtType type)
 509 {
 510     return ChannelsFromDevFmt(chans) * BytesFromDevFmt(type);
 511 }
 512
 513
 514 extern const struct EffectList {
 515     const char *name;
 516     int type;
 517     const char *ename;
 518     ALenum val;
 519 } EffectList[];
 520
 521
 522 enum DeviceType {
 523     Playback,
 524     Capture,
 525     Loopback
 526 };
 527
 528 struct ALCdevice_struct
 529 {
 530     volatile RefCount ref;
 531
 532     ALCboolean Connected;
 533     enum DeviceType Type;
 534
 535     CRITICAL_SECTION Mutex;
 536
 537     ALuint       Frequency;
 538     ALuint       UpdateSize;
 539     ALuint       NumUpdates;
 540     enum DevFmtChannels FmtChans;
 541     enum DevFmtType     FmtType;
 542
 543     ALCchar      *DeviceName;
 544
 545     volatile ALCenum LastError;
 546
 547     // Maximum number of sources that can be created
 548     ALuint       MaxNoOfSources;
 549     // Maximum number of slots that can be created
 550     ALuint       AuxiliaryEffectSlotMax;
 551
 552     ALCuint      NumMonoSources;
 553     ALCuint      NumStereoSources;
 554     ALuint       NumAuxSends;
 555
 556     // Map of Buffers for this device
 557     UIntMap BufferMap;
 558
 559     // Map of Effects for this device
 560     UIntMap EffectMap;
 561
 562     // Map of Filters for this device
 563     UIntMap FilterMap;
 564
 565     /* HRTF filter tables */
 566     const struct Hrtf *Hrtf;
 567
 568     // Stereo-to-binaural filter
 569     struct bs2b *Bs2b;
 570     ALCint       Bs2bLevel;
 571
 572     // Device flags
 573     ALuint       Flags;
 574
 575     // Dry path buffer mix
 576     ALfloat DryBuffer[BUFFERSIZE][MAXCHANNELS];
 577
 578     enum Channel DevChannels[MAXCHANNELS];
 579
 580     enum Channel Speaker2Chan[MAXCHANNELS];
 581     ALfloat SpeakerAngle[MAXCHANNELS];
 582     ALuint  NumChan;
 583
 584     ALfloat ClickRemoval[MAXCHANNELS];
 585     ALfloat PendingClicks[MAXCHANNELS];
 586
 587     /* Default effect slot */
 588     struct ALeffectslot *DefaultSlot;
 589
 590     // Contexts created on this device
 591     ALCcontext *volatile ContextList;
 592
 593     BackendFuncs *Funcs;
 594     void         *ExtraData; // For the backend's use
 595
 596     ALCdevice *volatile next;
 597 };
 598
 599 #define ALCdevice_OpenPlayback(a,b)      ((a)->Funcs->OpenPlayback((a), (b)))
 600 #define ALCdevice_ClosePlayback(a)       ((a)->Funcs->ClosePlayback((a)))
 601 #define ALCdevice_ResetPlayback(a)       ((a)->Funcs->ResetPlayback((a)))
 602 #define ALCdevice_StartPlayback(a)       ((a)->Funcs->StartPlayback((a)))
 603 #define ALCdevice_StopPlayback(a)        ((a)->Funcs->StopPlayback((a)))
 604 #define ALCdevice_OpenCapture(a,b)       ((a)->Funcs->OpenCapture((a), (b)))
 605 #define ALCdevice_CloseCapture(a)        ((a)->Funcs->CloseCapture((a)))
 606 #define ALCdevice_StartCapture(a)        ((a)->Funcs->StartCapture((a)))
 607 #define ALCdevice_StopCapture(a)         ((a)->Funcs->StopCapture((a)))
 608 #define ALCdevice_CaptureSamples(a,b,c)  ((a)->Funcs->CaptureSamples((a), (b), (c)))
 609 #define ALCdevice_AvailableSamples(a)    ((a)->Funcs->AvailableSamples((a)))
 610
 611 // Frequency was requested by the app or config file
 612 #define DEVICE_FREQUENCY_REQUEST                 (1<<1)
 613 // Channel configuration was requested by the config file
 614 #define DEVICE_CHANNELS_REQUEST                  (1<<2)
 615 // Sample type was requested by the config file
 616 #define DEVICE_SAMPLE_TYPE_REQUEST               (1<<3)
 617
 618 // Specifies if the device is currently running
 619 #define DEVICE_RUNNING                           (1<<31)
 620
 621 #define LookupBuffer(m, k) ((struct ALbuffer*)LookupUIntMapKey(&(m)->BufferMap, (k)))
 622 #define LookupEffect(m, k) ((struct ALeffect*)LookupUIntMapKey(&(m)->EffectMap, (k)))
 623 #define LookupFilter(m, k) ((struct ALfilter*)LookupUIntMapKey(&(m)->FilterMap, (k)))
 624 #define RemoveBuffer(m, k) ((struct ALbuffer*)RemoveUIntMapKey(&(m)->BufferMap, (k)))
 625 #define RemoveEffect(m, k) ((struct ALeffect*)RemoveUIntMapKey(&(m)->EffectMap, (k)))
 626 #define RemoveFilter(m, k) ((struct ALfilter*)RemoveUIntMapKey(&(m)->FilterMap, (k)))
 627
 628
 629 struct ALCcontext_struct
 630 {
 631     volatile RefCount ref;
 632
 633     ALlistener Listener;
 634
 635     UIntMap SourceMap;
 636     UIntMap EffectSlotMap;
 637
 638     ALenum LastError;
 639
 640     volatile ALenum UpdateSources;
 641
 642     volatile enum DistanceModel DistanceModel;
 643     volatile ALboolean SourceDistanceModel;
 644
 645     volatile ALfloat DopplerFactor;
 646     volatile ALfloat DopplerVelocity;
 647     volatile ALfloat SpeedOfSound;
 648     volatile ALenum  DeferUpdates;
 649
 650     struct ALsource **ActiveSources;
 651     ALsizei           ActiveSourceCount;
 652     ALsizei           MaxActiveSources;
 653
 654     struct ALeffectslot **ActiveEffectSlots;
 655     ALsizei               ActiveEffectSlotCount;
 656     ALsizei               MaxActiveEffectSlots;
 657
 658     ALCdevice  *Device;
 659     const ALCchar *ExtensionList;
 660
 661     ALCcontext *volatile next;
 662 };
 663
 664 #define LookupSource(m, k) ((struct ALsource*)LookupUIntMapKey(&(m)->SourceMap, (k)))
 665 #define LookupEffectSlot(m, k) ((struct ALeffectslot*)LookupUIntMapKey(&(m)->EffectSlotMap, (k)))
 666 #define RemoveSource(m, k) ((struct ALsource*)RemoveUIntMapKey(&(m)->SourceMap, (k)))
 667 #define RemoveEffectSlot(m, k) ((struct ALeffectslot*)RemoveUIntMapKey(&(m)->EffectSlotMap, (k)))
 668
 669 ALCcontext *GetContextRef(void);
 670
 671 void ALCcontext_IncRef(ALCcontext *context);
 672 void ALCcontext_DecRef(ALCcontext *context);
 673
 674 void AppendAllDeviceList(const ALCchar *name);
 675 void AppendCaptureDeviceList(const ALCchar *name);
 676
 677 static __inline void LockDevice(ALCdevice *device)
 678 { EnterCriticalSection(&device->Mutex); }
 679 static __inline void UnlockDevice(ALCdevice *device)
 680 { LeaveCriticalSection(&device->Mutex); }
 681
 682 static __inline void LockContext(ALCcontext *context)
 683 { LockDevice(context->Device); }
 684 static __inline void UnlockContext(ALCcontext *context)
 685 { UnlockDevice(context->Device); }
 686
 687
 688 ALvoid *StartThread(ALuint (*func)(ALvoid*), ALvoid *ptr);
 689 ALuint StopThread(ALvoid *thread);
 690
 691 typedef struct RingBuffer RingBuffer;
 692 RingBuffer *CreateRingBuffer(ALsizei frame_size, ALsizei length);
 693 void DestroyRingBuffer(RingBuffer *ring);
 694 ALsizei RingBufferSize(RingBuffer *ring);
 695 void WriteRingBuffer(RingBuffer *ring, const ALubyte *data, ALsizei len);
 696 void ReadRingBuffer(RingBuffer *ring, ALubyte *data, ALsizei len);
 697
 698 void ReadALConfig(void);
 699 void FreeALConfig(void);
 700 int ConfigValueExists(const char *blockName, const char *keyName);
 701 const char *GetConfigValue(const char *blockName, const char *keyName, const char *def);
 702 int GetConfigValueBool(const char *blockName, const char *keyName, int def);
 703 int ConfigValueStr(const char *blockName, const char *keyName, const char **ret);
 704 int ConfigValueInt(const char *blockName, const char *keyName, int *ret);
 705 int ConfigValueUInt(const char *blockName, const char *keyName, unsigned int *ret);
 706 int ConfigValueFloat(const char *blockName, const char *keyName, float *ret);
 707
 708 void SetRTPriority(void);
 709
 710 void SetDefaultChannelOrder(ALCdevice *device);
 711 void SetDefaultWFXChannelOrder(ALCdevice *device);
 712
 713 const ALCchar *DevFmtTypeString(enum DevFmtType type);
 714 const ALCchar *DevFmtChannelsString(enum DevFmtChannels chans);
 715
 716 #define HRIR_BITS        (5)
 717 #define HRIR_LENGTH      (1<<HRIR_BITS)
 718 #define HRIR_MASK        (HRIR_LENGTH-1)
 719 void InitHrtf(void);
 720 void FreeHrtf(void);
 721 const struct Hrtf *GetHrtf(ALCdevice *device);
 722 ALfloat CalcHrtfDelta(ALfloat oldGain, ALfloat newGain, const ALfloat olddir[3], const ALfloat newdir[3]);
 723 void GetLerpedHrtfCoeffs(const struct Hrtf *Hrtf, ALfloat elevation, ALfloat azimuth, ALfloat gain, ALfloat (*coeffs)[2], ALuint *delays);
 724 ALuint GetMovingHrtfCoeffs(const struct Hrtf *Hrtf, ALfloat elevation, ALfloat azimuth, ALfloat gain, ALfloat delta, ALint counter, ALfloat (*coeffs)[2], ALuint *delays, ALfloat (*coeffStep)[2], ALint *delayStep);
 725
 726 void al_print(const char *func, const char *fmt, ...) PRINTF_STYLE(2,3);
 727 #define AL_PRINT(...) al_print(__FUNCTION__, __VA_ARGS__)
 728
 729 extern FILE *LogFile;
 730 enum LogLevel {
 731     NoLog,
 732     LogError,
 733     LogWarning,
 734     LogTrace,
 735     LogRef
 736 };
 737 extern enum LogLevel LogLevel;
 738
 739 #define TRACEREF(...) do {                                                    \
 740     if(LogLevel >= LogRef)                                                    \
 741         AL_PRINT(__VA_ARGS__);                                                \
 742 } while(0)
 743
 744 #define TRACE(...) do {                                                       \
 745     if(LogLevel >= LogTrace)                                                  \
 746         AL_PRINT(__VA_ARGS__);                                                \
 747 } while(0)
 748
 749 #define WARN(...) do {                                                        \
 750     if(LogLevel >= LogWarning)                                                \
 751         AL_PRINT(__VA_ARGS__);                                                \
 752 } while(0)
 753
 754 #define ERR(...) do {                                                         \
 755     if(LogLevel >= LogError)                                                  \
 756         AL_PRINT(__VA_ARGS__);                                                \
 757 } while(0)
 758
 759
 760 extern ALint RTPrioLevel;
 761
 762 /**
 763  * Starts a try block. Must not be nested within another try block within the
 764  * same function.
 765  */
 766 #define al_try do {                                                           \
 767     int _al_err=0;                                                            \
 768 _al_try_label:                                                                \
 769     if(_al_err == 0)
 770 /**
 771  * After a try or another catch block, runs the next block if the given value
 772  * was thrown.
 773  */
 774 #define al_catch(val) else if(_al_err == (val))
 775 /**
 776  * After a try or catch block, runs the next block for any value thrown and not
 777  * caught.
 778  */
 779 #define al_catchany() else
 780 /** Marks the end of the final catch (or the try) block. */
 781 #define al_endtry } while(0)
 782
 783 /**
 784  * The given integer value is "thrown" so as to be caught by a catch block.
 785  * Must be called in a try block within the same function. The value must not
 786  * be 0.
 787  */
 788 #define al_throw(e) do {                                                      \
 789     _al_err = (e);                                                            \
 790     assert(_al_err != 0);                                                     \
 791     goto _al_try_label;                                                       \
 792 } while(0)
 793 /** Sets an AL error on the given context, before throwing the error code. */
 794 #define al_throwerr(ctx, err) do {                                            \
 795     alSetError((ctx), (err));                                                 \
 796     al_throw((err));                                                          \
 797 } while(0)
 798
 799 /**
 800  * Throws an AL_INVALID_VALUE error with the given ctx if the given condition
 801  * is false.
 802  */
 803 #define CHECK_VALUE(ctx, cond) do {                                           \
 804     if(!(cond))                                                               \
 805         al_throwerr((ctx), AL_INVALID_VALUE);                                 \
 806 } while(0)
 807
 808 #ifdef __cplusplus
 809 }
 810 #endif
 811
 812 #endif