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
   8 #ifdef HAVE_FENV_H
   9 #include <fenv.h>
  10 #endif
  11
  12 #ifdef HAVE_FPU_CONTROL_H
  13 #include <fpu_control.h>
  14 #endif
  15
  16 #include "AL/al.h"
  17 #include "AL/alc.h"
  18 #include "AL/alext.h"
  19
  20 #ifndef ALC_SOFT_device_loopback
  21 #define ALC_SOFT_device_loopback 1
  22 #define ALC_FORMAT_CHANNELS_SOFT                 0x1990
  23 #define ALC_FORMAT_TYPE_SOFT                     0x1991
  24
  25 /* Sample types */
  26 #define ALC_BYTE_SOFT                            0x1400
  27 #define ALC_UNSIGNED_BYTE_SOFT                   0x1401
  28 #define ALC_SHORT_SOFT                           0x1402
  29 #define ALC_UNSIGNED_SHORT_SOFT                  0x1403
  30 #define ALC_INT_SOFT                             0x1404
  31 #define ALC_UNSIGNED_INT_SOFT                    0x1405
  32 #define ALC_FLOAT_SOFT                           0x1406
  33
  34 /* Channel configurations */
  35 #define ALC_MONO_SOFT                            0x1500
  36 #define ALC_STEREO_SOFT                          0x1501
  37 #define ALC_QUAD_SOFT                            0x1503
  38 #define ALC_5POINT1_SOFT                         0x1504 /* (WFX order) */
  39 #define ALC_6POINT1_SOFT                         0x1505 /* (WFX order) */
  40 #define ALC_7POINT1_SOFT                         0x1506 /* (WFX order) */
  41
  42 typedef ALCdevice* (ALC_APIENTRY*LPALCLOOPBACKOPENDEVICESOFT)(ALCdevice*);
  43 typedef ALCboolean (ALC_APIENTRY*LPALCISRENDERFORMATSUPPORTEDSOFT)(ALCdevice*,ALCsizei,ALCenum,ALCenum);
  44 typedef void (ALC_APIENTRY*LPALCRENDERSAMPLESSOFT)(ALCdevice*,ALCvoid*,ALCsizei);
  45 #ifdef AL_ALEXT_PROTOTYPES
  46 ALC_API ALCdevice* ALC_APIENTRY alcLoopbackOpenDeviceSOFT(ALCdevice *device);
  47 ALC_API ALCboolean ALC_APIENTRY alcIsRenderFormatSupportedSOFT(ALCdevice *device, ALCsizei freq, ALCenum channels, ALCenum type);
  48 ALC_API void ALC_APIENTRY alcRenderSamplesSOFT(ALCdevice *device, ALCvoid *buffer, ALCsizei samples);
  49 #endif
  50 #endif
  51
  52 #ifndef AL_SOFT_direct_channels
  53 #define AL_SOFT_direct_channels 1
  54 #define AL_DIRECT_CHANNELS_SOFT                  0x1033
  55 #endif
  56
  57 #ifndef AL_SOFT_deferred_updates
  58 #define AL_SOFT_deferred_updates 1
  59 #define AL_DEFERRED_UPDATES_SOFT                 0xC002
  60 typedef ALvoid (AL_APIENTRY*LPALDEFERUPDATESSOFT)(void);
  61 typedef ALvoid (AL_APIENTRY*LPALPROCESSUPDATESSOFT)(void);
  62 #ifdef AL_ALEXT_PROTOTYPES
  63 AL_API ALvoid AL_APIENTRY alDeferUpdatesSOFT(void);
  64 AL_API ALvoid AL_APIENTRY alProcessUpdatesSOFT(void);
  65 #endif
  66 #endif
  67
  68
  69 #if defined(HAVE_STDINT_H)
  70 #include <stdint.h>
  71 typedef int64_t ALint64;
  72 typedef uint64_t ALuint64;
  73 #elif defined(HAVE___INT64)
  74 typedef __int64 ALint64;
  75 typedef unsigned __int64 ALuint64;
  76 #elif (SIZEOF_LONG == 8)
  77 typedef long ALint64;
  78 typedef unsigned long ALuint64;
  79 #elif (SIZEOF_LONG_LONG == 8)
  80 typedef long long ALint64;
  81 typedef unsigned long long ALuint64;
  82 #endif
  83
  84 typedef ptrdiff_t ALintptrEXT;
  85 typedef ptrdiff_t ALsizeiptrEXT;
  86
  87 #ifdef HAVE_GCC_FORMAT
  88 #define PRINTF_STYLE(x, y) __attribute__((format(printf, (x), (y))))
  89 #else
  90 #define PRINTF_STYLE(x, y)
  91 #endif
  92
  93 #if defined(HAVE_RESTRICT)
  94 #define RESTRICT restrict
  95 #elif defined(HAVE___RESTRICT)
  96 #define RESTRICT __restrict
  97 #else
  98 #define RESTRICT
  99 #endif
 100
 101
 102 static const union {
 103     ALuint u;
 104     ALubyte b[sizeof(ALuint)];
 105 } EndianTest = { 1 };
 106 #define IS_LITTLE_ENDIAN (EndianTest.b[0] == 1)
 107
 108 #define COUNTOF(x) (sizeof((x))/sizeof((x)[0]))
 109
 110 #ifdef _WIN32
 111
 112 #include <windows.h>
 113
 114 typedef DWORD pthread_key_t;
 115 int pthread_key_create(pthread_key_t *key, void (*callback)(void*));
 116 int pthread_key_delete(pthread_key_t key);
 117 void *pthread_getspecific(pthread_key_t key);
 118 int pthread_setspecific(pthread_key_t key, void *val);
 119
 120 #define HAVE_DYNLOAD 1
 121 void *LoadLib(const char *name);
 122 void CloseLib(void *handle);
 123 void *GetSymbol(void *handle, const char *name);
 124
 125 typedef LONG pthread_once_t;
 126 #define PTHREAD_ONCE_INIT 0
 127 void pthread_once(pthread_once_t *once, void (*callback)(void));
 128
 129 static __inline int sched_yield(void)
 130 { SwitchToThread(); return 0; }
 131
 132 #else
 133
 134 #include <unistd.h>
 135 #include <assert.h>
 136 #include <pthread.h>
 137 #ifdef HAVE_PTHREAD_NP_H
 138 #include <pthread_np.h>
 139 #endif
 140 #include <sys/time.h>
 141 #include <time.h>
 142 #include <errno.h>
 143
 144 #define IsBadWritePtr(a,b) ((a) == NULL && (b) != 0)
 145
 146 typedef pthread_mutex_t CRITICAL_SECTION;
 147 void InitializeCriticalSection(CRITICAL_SECTION *cs);
 148 void DeleteCriticalSection(CRITICAL_SECTION *cs);
 149 void EnterCriticalSection(CRITICAL_SECTION *cs);
 150 void LeaveCriticalSection(CRITICAL_SECTION *cs);
 151
 152 ALuint timeGetTime(void);
 153 void Sleep(ALuint t);
 154
 155 #if defined(HAVE_DLFCN_H)
 156 #define HAVE_DYNLOAD 1
 157 void *LoadLib(const char *name);
 158 void CloseLib(void *handle);
 159 void *GetSymbol(void *handle, const char *name);
 160 #endif
 161
 162 #endif
 163
 164 typedef void *volatile XchgPtr;
 165
 166 #if defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1))
 167 typedef ALuint RefCount;
 168 static __inline RefCount IncrementRef(volatile RefCount *ptr)
 169 { return __sync_add_and_fetch(ptr, 1); }
 170 static __inline RefCount DecrementRef(volatile RefCount *ptr)
 171 { return __sync_sub_and_fetch(ptr, 1); }
 172
 173 static __inline int ExchangeInt(volatile int *ptr, int newval)
 174 {
 175     return __sync_lock_test_and_set(ptr, newval);
 176 }
 177 static __inline void *ExchangePtr(XchgPtr *ptr, void *newval)
 178 {
 179     return __sync_lock_test_and_set(ptr, newval);
 180 }
 181 static __inline ALboolean CompExchangeInt(volatile int *ptr, int oldval, int newval)
 182 {
 183     return __sync_bool_compare_and_swap(ptr, oldval, newval);
 184 }
 185 static __inline ALboolean CompExchangePtr(XchgPtr *ptr, void *oldval, void *newval)
 186 {
 187     return __sync_bool_compare_and_swap(ptr, oldval, newval);
 188 }
 189
 190 #elif defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
 191
 192 static __inline int xaddl(volatile int *dest, int incr)
 193 {
 194     int ret;
 195     __asm__ __volatile__("lock; xaddl %0,(%1)"
 196                          : "=r" (ret)
 197                          : "r" (dest), "0" (incr)
 198                          : "memory");
 199     return ret;
 200 }
 201
 202 typedef int RefCount;
 203 static __inline RefCount IncrementRef(volatile RefCount *ptr)
 204 { return xaddl(ptr, 1)+1; }
 205 static __inline RefCount DecrementRef(volatile RefCount *ptr)
 206 { return xaddl(ptr, -1)-1; }
 207
 208 static __inline int ExchangeInt(volatile int *dest, int newval)
 209 {
 210     int ret;
 211     __asm__ __volatile__("lock; xchgl %0,(%1)"
 212                          : "=r" (ret)
 213                          : "r" (dest), "0" (newval)
 214                          : "memory");
 215     return ret;
 216 }
 217
 218 static __inline ALboolean CompExchangeInt(volatile int *dest, int oldval, int newval)
 219 {
 220     int ret;
 221     __asm__ __volatile__("lock; cmpxchgl %2,(%1)"
 222                          : "=a" (ret)
 223                          : "r" (dest), "r" (newval), "0" (oldval)
 224                          : "memory");
 225     return ret == oldval;
 226 }
 227
 228 static __inline void *ExchangePtr(XchgPtr *dest, void *newval)
 229 {
 230     void *ret;
 231     __asm__ __volatile__(
 232 #ifdef __i386__
 233                          "lock; xchgl %0,(%1)"
 234 #else
 235                          "lock; xchgq %0,(%1)"
 236 #endif
 237                          : "=r" (ret)
 238                          : "r" (dest), "0" (newval)
 239                          : "memory"
 240     );
 241     return ret;
 242 }
 243
 244 static __inline ALboolean CompExchangePtr(XchgPtr *dest, void *oldval, void *newval)
 245 {
 246     void *ret;
 247     __asm__ __volatile__(
 248 #ifdef __i386__
 249                          "lock; cmpxchgl %2,(%1)"
 250 #else
 251                          "lock; cmpxchgq %2,(%1)"
 252 #endif
 253                          : "=a" (ret)
 254                          : "r" (dest), "r" (newval), "0" (oldval)
 255                          : "memory"
 256     );
 257     return ret == oldval;
 258 }
 259
 260 #elif defined(_WIN32)
 261
 262 typedef LONG RefCount;
 263 static __inline RefCount IncrementRef(volatile RefCount *ptr)
 264 { return InterlockedIncrement(ptr); }
 265 static __inline RefCount DecrementRef(volatile RefCount *ptr)
 266 { return InterlockedDecrement(ptr); }
 267
 268 extern ALbyte LONG_size_does_not_match_int[(sizeof(LONG)==sizeof(int))?1:-1];
 269
 270 static __inline int ExchangeInt(volatile int *ptr, int newval)
 271 {
 272     union {
 273         volatile int *i;
 274         volatile LONG *l;
 275     } u = { ptr };
 276     return InterlockedExchange(u.l, newval);
 277 }
 278 static __inline void *ExchangePtr(XchgPtr *ptr, void *newval)
 279 {
 280     return InterlockedExchangePointer(ptr, newval);
 281 }
 282 static __inline ALboolean CompExchangeInt(volatile int *ptr, int oldval, int newval)
 283 {
 284     union {
 285         volatile int *i;
 286         volatile LONG *l;
 287     } u = { ptr };
 288     return InterlockedCompareExchange(u.l, newval, oldval) == oldval;
 289 }
 290 static __inline ALboolean CompExchangePtr(XchgPtr *ptr, void *oldval, void *newval)
 291 {
 292     return InterlockedCompareExchangePointer(ptr, newval, oldval) == oldval;
 293 }
 294
 295 #elif defined(__APPLE__)
 296
 297 #include <libkern/OSAtomic.h>
 298
 299 typedef int32_t RefCount;
 300 static __inline RefCount IncrementRef(volatile RefCount *ptr)
 301 { return OSAtomicIncrement32Barrier(ptr); }
 302 static __inline RefCount DecrementRef(volatile RefCount *ptr)
 303 { return OSAtomicDecrement32Barrier(ptr); }
 304
 305 static __inline int ExchangeInt(volatile int *ptr, int newval)
 306 {
 307     /* Really? No regular old atomic swap? */
 308     int oldval;
 309     do {
 310         oldval = *ptr;
 311     } while(!OSAtomicCompareAndSwap32Barrier(oldval, newval, ptr));
 312     return oldval;
 313 }
 314 static __inline void *ExchangePtr(XchgPtr *ptr, void *newval)
 315 {
 316     void *oldval;
 317     do {
 318         oldval = *ptr;
 319     } while(!OSAtomicCompareAndSwapPtrBarrier(oldval, newval, ptr));
 320     return oldval;
 321 }
 322 static __inline ALboolean CompExchangeInt(volatile int *ptr, int oldval, int newval)
 323 {
 324     return OSAtomicCompareAndSwap32Barrier(oldval, newval, ptr);
 325 }
 326 static __inline ALboolean CompExchangePtr(XchgPtr *ptr, void *oldval, void *newval)
 327 {
 328     return OSAtomicCompareAndSwapPtrBarrier(oldval, newval, ptr);
 329 }
 330
 331 #else
 332 #error "No atomic functions available on this platform!"
 333 typedef ALuint RefCount;
 334 #endif
 335
 336
 337 typedef struct {
 338     volatile RefCount read_count;
 339     volatile RefCount write_count;
 340     volatile ALenum read_lock;
 341     volatile ALenum read_entry_lock;
 342     volatile ALenum write_lock;
 343 } RWLock;
 344
 345 void RWLockInit(RWLock *lock);
 346 void ReadLock(RWLock *lock);
 347 void ReadUnlock(RWLock *lock);
 348 void WriteLock(RWLock *lock);
 349 void WriteUnlock(RWLock *lock);
 350
 351
 352 typedef struct UIntMap {
 353     struct {
 354         ALuint key;
 355         ALvoid *value;
 356     } *array;
 357     ALsizei size;
 358     ALsizei maxsize;
 359     ALsizei limit;
 360     RWLock lock;
 361 } UIntMap;
 362 extern UIntMap TlsDestructor;
 363
 364 void InitUIntMap(UIntMap *map, ALsizei limit);
 365 void ResetUIntMap(UIntMap *map);
 366 ALenum InsertUIntMapEntry(UIntMap *map, ALuint key, ALvoid *value);
 367 ALvoid *RemoveUIntMapKey(UIntMap *map, ALuint key);
 368 ALvoid *LookupUIntMapKey(UIntMap *map, ALuint key);
 369
 370 static __inline void LockUIntMapRead(UIntMap *map)
 371 { ReadLock(&map->lock); }
 372 static __inline void UnlockUIntMapRead(UIntMap *map)
 373 { ReadUnlock(&map->lock); }
 374 static __inline void LockUIntMapWrite(UIntMap *map)
 375 { WriteLock(&map->lock); }
 376 static __inline void UnlockUIntMapWrite(UIntMap *map)
 377 { WriteUnlock(&map->lock); }
 378
 379 #include "alListener.h"
 380 #include "alu.h"
 381
 382 #ifdef __cplusplus
 383 extern "C" {
 384 #endif
 385
 386
 387 #define DEFAULT_OUTPUT_RATE        (44100)
 388 #define MIN_OUTPUT_RATE            (8000)
 389
 390 #define SPEEDOFSOUNDMETRESPERSEC   (343.3f)
 391 #define AIRABSORBGAINHF            (0.99426f) /* -0.05dB */
 392
 393 #define LOWPASSFREQREF             (5000)
 394
 395
 396 struct Hrtf;
 397
 398
 399 // Find the next power-of-2 for non-power-of-2 numbers.
 400 static __inline ALuint NextPowerOf2(ALuint value)
 401 {
 402     ALuint powerOf2 = 1;
 403
 404     if(value)
 405     {
 406         value--;
 407         while(value)
 408         {
 409             value >>= 1;
 410             powerOf2 <<= 1;
 411         }
 412     }
 413     return powerOf2;
 414 }
 415
 416 /* Fast float-to-int conversion. Assumes the FPU is already in round-to-zero
 417  * mode. */
 418 static __inline ALint fastf2i(ALfloat f)
 419 {
 420     ALint i;
 421 #if defined(_MSC_VER) && defined(_M_IX86)
 422     __asm fld f
 423     __asm fistp i
 424 #elif defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
 425     __asm__ __volatile__("flds %1\n\t"
 426                          "fistpl %0\n\t"
 427                          : "=m" (i)
 428                          : "m" (f));
 429 #else
 430     i = (ALint)f;
 431 #endif
 432     return i;
 433 }
 434
 435 /* Fast float-to-uint conversion. Assumes the FPU is already in round-to-zero
 436  * mode. */
 437 static __inline ALuint fastf2u(ALfloat f)
 438 { return fastf2i(f); }
 439
 440
 441 enum DevProbe {
 442     ALL_DEVICE_PROBE,
 443     CAPTURE_DEVICE_PROBE
 444 };
 445
 446 typedef struct {
 447     ALCenum (*OpenPlayback)(ALCdevice*, const ALCchar*);
 448     void (*ClosePlayback)(ALCdevice*);
 449     ALCboolean (*ResetPlayback)(ALCdevice*);
 450     void (*StopPlayback)(ALCdevice*);
 451
 452     ALCenum (*OpenCapture)(ALCdevice*, const ALCchar*);
 453     void (*CloseCapture)(ALCdevice*);
 454     void (*StartCapture)(ALCdevice*);
 455     void (*StopCapture)(ALCdevice*);
 456     ALCenum (*CaptureSamples)(ALCdevice*, void*, ALCuint);
 457     ALCuint (*AvailableSamples)(ALCdevice*);
 458 } BackendFuncs;
 459
 460 struct BackendInfo {
 461     const char *name;
 462     ALCboolean (*Init)(BackendFuncs*);
 463     void (*Deinit)(void);
 464     void (*Probe)(enum DevProbe);
 465     BackendFuncs Funcs;
 466 };
 467
 468 ALCboolean alc_alsa_init(BackendFuncs *func_list);
 469 void alc_alsa_deinit(void);
 470 void alc_alsa_probe(enum DevProbe type);
 471 ALCboolean alc_oss_init(BackendFuncs *func_list);
 472 void alc_oss_deinit(void);
 473 void alc_oss_probe(enum DevProbe type);
 474 ALCboolean alc_solaris_init(BackendFuncs *func_list);
 475 void alc_solaris_deinit(void);
 476 void alc_solaris_probe(enum DevProbe type);
 477 ALCboolean alc_sndio_init(BackendFuncs *func_list);
 478 void alc_sndio_deinit(void);
 479 void alc_sndio_probe(enum DevProbe type);
 480 ALCboolean alcMMDevApiInit(BackendFuncs *func_list);
 481 void alcMMDevApiDeinit(void);
 482 void alcMMDevApiProbe(enum DevProbe type);
 483 ALCboolean alcDSoundInit(BackendFuncs *func_list);
 484 void alcDSoundDeinit(void);
 485 void alcDSoundProbe(enum DevProbe type);
 486 ALCboolean alcWinMMInit(BackendFuncs *FuncList);
 487 void alcWinMMDeinit(void);
 488 void alcWinMMProbe(enum DevProbe type);
 489 ALCboolean alc_pa_init(BackendFuncs *func_list);
 490 void alc_pa_deinit(void);
 491 void alc_pa_probe(enum DevProbe type);
 492 ALCboolean alc_wave_init(BackendFuncs *func_list);
 493 void alc_wave_deinit(void);
 494 void alc_wave_probe(enum DevProbe type);
 495 ALCboolean alc_pulse_init(BackendFuncs *func_list);
 496 void alc_pulse_deinit(void);
 497 void alc_pulse_probe(enum DevProbe type);
 498 ALCboolean alc_ca_init(BackendFuncs *func_list);
 499 void alc_ca_deinit(void);
 500 void alc_ca_probe(enum DevProbe type);
 501 ALCboolean alc_opensl_init(BackendFuncs *func_list);
 502 void alc_opensl_deinit(void);
 503 void alc_opensl_probe(enum DevProbe type);
 504 ALCboolean alc_null_init(BackendFuncs *func_list);
 505 void alc_null_deinit(void);
 506 void alc_null_probe(enum DevProbe type);
 507 ALCboolean alc_loopback_init(BackendFuncs *func_list);
 508 void alc_loopback_deinit(void);
 509 void alc_loopback_probe(enum DevProbe type);
 510
 511
 512 /* Device formats */
 513 enum DevFmtType {
 514     DevFmtByte   = ALC_BYTE_SOFT,
 515     DevFmtUByte  = ALC_UNSIGNED_BYTE_SOFT,
 516     DevFmtShort  = ALC_SHORT_SOFT,
 517     DevFmtUShort = ALC_UNSIGNED_SHORT_SOFT,
 518     DevFmtInt    = ALC_INT_SOFT,
 519     DevFmtUInt   = ALC_UNSIGNED_INT_SOFT,
 520     DevFmtFloat  = ALC_FLOAT_SOFT
 521 };
 522 enum DevFmtChannels {
 523     DevFmtMono   = ALC_MONO_SOFT,
 524     DevFmtStereo = ALC_STEREO_SOFT,
 525     DevFmtQuad   = ALC_QUAD_SOFT,
 526     DevFmtX51    = ALC_5POINT1_SOFT,
 527     DevFmtX61    = ALC_6POINT1_SOFT,
 528     DevFmtX71    = ALC_7POINT1_SOFT,
 529
 530     /* Similar to 5.1, except using the side channels instead of back */
 531     DevFmtX51Side = 0x80000000 | ALC_5POINT1_SOFT
 532 };
 533
 534 ALuint BytesFromDevFmt(enum DevFmtType type);
 535 ALuint ChannelsFromDevFmt(enum DevFmtChannels chans);
 536 static __inline ALuint FrameSizeFromDevFmt(enum DevFmtChannels chans,
 537                                            enum DevFmtType type)
 538 {
 539     return ChannelsFromDevFmt(chans) * BytesFromDevFmt(type);
 540 }
 541
 542
 543 extern const struct EffectList {
 544     const char *name;
 545     int type;
 546     const char *ename;
 547     ALenum val;
 548 } EffectList[];
 549
 550
 551 struct ALCdevice_struct
 552 {
 553     volatile RefCount ref;
 554
 555     ALCboolean   Connected;
 556     ALboolean    IsCaptureDevice;
 557     ALboolean    IsLoopbackDevice;
 558
 559     CRITICAL_SECTION Mutex;
 560
 561     ALuint       Frequency;
 562     ALuint       UpdateSize;
 563     ALuint       NumUpdates;
 564     enum DevFmtChannels FmtChans;
 565     enum DevFmtType     FmtType;
 566
 567     ALCchar      *szDeviceName;
 568
 569     volatile ALCenum LastError;
 570
 571     // Maximum number of sources that can be created
 572     ALuint       MaxNoOfSources;
 573     // Maximum number of slots that can be created
 574     ALuint       AuxiliaryEffectSlotMax;
 575
 576     ALCuint      NumMonoSources;
 577     ALCuint      NumStereoSources;
 578     ALuint       NumAuxSends;
 579
 580     // Map of Buffers for this device
 581     UIntMap BufferMap;
 582
 583     // Map of Effects for this device
 584     UIntMap EffectMap;
 585
 586     // Map of Filters for this device
 587     UIntMap FilterMap;
 588
 589     /* HRTF filter tables */
 590     const struct Hrtf *Hrtf;
 591
 592     // Stereo-to-binaural filter
 593     struct bs2b *Bs2b;
 594     ALCint       Bs2bLevel;
 595
 596     // Device flags
 597     ALuint       Flags;
 598
 599     // Dry path buffer mix
 600     ALfloat DryBuffer[BUFFERSIZE][MAXCHANNELS];
 601
 602     enum Channel DevChannels[MAXCHANNELS];
 603
 604     enum Channel Speaker2Chan[MAXCHANNELS];
 605     ALfloat PanningLUT[LUT_NUM][MAXCHANNELS];
 606     ALuint  NumChan;
 607
 608     ALfloat ClickRemoval[MAXCHANNELS];
 609     ALfloat PendingClicks[MAXCHANNELS];
 610
 611     /* Default effect slot */
 612     struct ALeffectslot *DefaultSlot;
 613
 614     // Contexts created on this device
 615     ALCcontext *volatile ContextList;
 616
 617     BackendFuncs *Funcs;
 618     void         *ExtraData; // For the backend's use
 619
 620     ALCdevice *volatile next;
 621 };
 622
 623 #define ALCdevice_OpenPlayback(a,b)      ((a)->Funcs->OpenPlayback((a), (b)))
 624 #define ALCdevice_ClosePlayback(a)       ((a)->Funcs->ClosePlayback((a)))
 625 #define ALCdevice_ResetPlayback(a)       ((a)->Funcs->ResetPlayback((a)))
 626 #define ALCdevice_StopPlayback(a)        ((a)->Funcs->StopPlayback((a)))
 627 #define ALCdevice_OpenCapture(a,b)       ((a)->Funcs->OpenCapture((a), (b)))
 628 #define ALCdevice_CloseCapture(a)        ((a)->Funcs->CloseCapture((a)))
 629 #define ALCdevice_StartCapture(a)        ((a)->Funcs->StartCapture((a)))
 630 #define ALCdevice_StopCapture(a)         ((a)->Funcs->StopCapture((a)))
 631 #define ALCdevice_CaptureSamples(a,b,c)  ((a)->Funcs->CaptureSamples((a), (b), (c)))
 632 #define ALCdevice_AvailableSamples(a)    ((a)->Funcs->AvailableSamples((a)))
 633
 634 // Duplicate stereo sources on the side/rear channels
 635 #define DEVICE_DUPLICATE_STEREO                  (1<<0)
 636 // Frequency was requested by the app or config file
 637 #define DEVICE_FREQUENCY_REQUEST                 (1<<1)
 638 // Channel configuration was requested by the config file
 639 #define DEVICE_CHANNELS_REQUEST                  (1<<2)
 640 // Sample type was requested by the config file
 641 #define DEVICE_SAMPLE_TYPE_REQUEST               (1<<3)
 642
 643 // Specifies if the device is currently running
 644 #define DEVICE_RUNNING                           (1<<31)
 645
 646 #define LookupBuffer(m, k) ((struct ALbuffer*)LookupUIntMapKey(&(m)->BufferMap, (k)))
 647 #define LookupEffect(m, k) ((struct ALeffect*)LookupUIntMapKey(&(m)->EffectMap, (k)))
 648 #define LookupFilter(m, k) ((struct ALfilter*)LookupUIntMapKey(&(m)->FilterMap, (k)))
 649 #define RemoveBuffer(m, k) ((struct ALbuffer*)RemoveUIntMapKey(&(m)->BufferMap, (k)))
 650 #define RemoveEffect(m, k) ((struct ALeffect*)RemoveUIntMapKey(&(m)->EffectMap, (k)))
 651 #define RemoveFilter(m, k) ((struct ALfilter*)RemoveUIntMapKey(&(m)->FilterMap, (k)))
 652
 653
 654 struct ALCcontext_struct
 655 {
 656     volatile RefCount ref;
 657
 658     ALlistener  Listener;
 659
 660     UIntMap SourceMap;
 661     UIntMap EffectSlotMap;
 662
 663     ALenum LastError;
 664
 665     volatile ALenum UpdateSources;
 666
 667     volatile enum DistanceModel DistanceModel;
 668     volatile ALboolean SourceDistanceModel;
 669
 670     volatile ALfloat DopplerFactor;
 671     volatile ALfloat DopplerVelocity;
 672     volatile ALfloat flSpeedOfSound;
 673     volatile ALenum  DeferUpdates;
 674
 675     struct ALsource **ActiveSources;
 676     ALsizei           ActiveSourceCount;
 677     ALsizei           MaxActiveSources;
 678
 679     struct ALeffectslot **ActiveEffectSlots;
 680     ALsizei               ActiveEffectSlotCount;
 681     ALsizei               MaxActiveEffectSlots;
 682
 683     ALCdevice  *Device;
 684     const ALCchar *ExtensionList;
 685
 686     ALCcontext *volatile next;
 687 };
 688
 689 #define LookupSource(m, k) ((struct ALsource*)LookupUIntMapKey(&(m)->SourceMap, (k)))
 690 #define LookupEffectSlot(m, k) ((struct ALeffectslot*)LookupUIntMapKey(&(m)->EffectSlotMap, (k)))
 691 #define RemoveSource(m, k) ((struct ALsource*)RemoveUIntMapKey(&(m)->SourceMap, (k)))
 692 #define RemoveEffectSlot(m, k) ((struct ALeffectslot*)RemoveUIntMapKey(&(m)->EffectSlotMap, (k)))
 693
 694 ALCcontext *GetContextRef(void);
 695
 696 void ALCcontext_IncRef(ALCcontext *context);
 697 void ALCcontext_DecRef(ALCcontext *context);
 698
 699 void AppendAllDeviceList(const ALCchar *name);
 700 void AppendCaptureDeviceList(const ALCchar *name);
 701
 702 static __inline void LockDevice(ALCdevice *device)
 703 { EnterCriticalSection(&device->Mutex); }
 704 static __inline void UnlockDevice(ALCdevice *device)
 705 { LeaveCriticalSection(&device->Mutex); }
 706
 707 static __inline void LockContext(ALCcontext *context)
 708 { LockDevice(context->Device); }
 709 static __inline void UnlockContext(ALCcontext *context)
 710 { UnlockDevice(context->Device); }
 711
 712
 713 ALvoid *StartThread(ALuint (*func)(ALvoid*), ALvoid *ptr);
 714 ALuint StopThread(ALvoid *thread);
 715
 716 typedef struct RingBuffer RingBuffer;
 717 RingBuffer *CreateRingBuffer(ALsizei frame_size, ALsizei length);
 718 void DestroyRingBuffer(RingBuffer *ring);
 719 ALsizei RingBufferSize(RingBuffer *ring);
 720 void WriteRingBuffer(RingBuffer *ring, const ALubyte *data, ALsizei len);
 721 void ReadRingBuffer(RingBuffer *ring, ALubyte *data, ALsizei len);
 722
 723 void ReadALConfig(void);
 724 void FreeALConfig(void);
 725 int ConfigValueExists(const char *blockName, const char *keyName);
 726 const char *GetConfigValue(const char *blockName, const char *keyName, const char *def);
 727 int GetConfigValueBool(const char *blockName, const char *keyName, int def);
 728 int ConfigValueStr(const char *blockName, const char *keyName, const char **ret);
 729 int ConfigValueInt(const char *blockName, const char *keyName, int *ret);
 730 int ConfigValueUInt(const char *blockName, const char *keyName, unsigned int *ret);
 731 int ConfigValueFloat(const char *blockName, const char *keyName, float *ret);
 732
 733 void SetRTPriority(void);
 734
 735 void SetDefaultChannelOrder(ALCdevice *device);
 736 void SetDefaultWFXChannelOrder(ALCdevice *device);
 737
 738 const ALCchar *DevFmtTypeString(enum DevFmtType type);
 739 const ALCchar *DevFmtChannelsString(enum DevFmtChannels chans);
 740
 741 #define HRIR_BITS        (5)
 742 #define HRIR_LENGTH      (1<<HRIR_BITS)
 743 #define HRIR_MASK        (HRIR_LENGTH-1)
 744 void InitHrtf(void);
 745 void FreeHrtf(void);
 746 const struct Hrtf *GetHrtf(ALCdevice *device);
 747 ALfloat CalcHrtfDelta(ALfloat oldGain, ALfloat newGain, const ALfloat olddir[3], const ALfloat newdir[3]);
 748 void GetLerpedHrtfCoeffs(const struct Hrtf *Hrtf, ALfloat elevation, ALfloat azimuth, ALfloat gain, ALfloat (*coeffs)[2], ALuint *delays);
 749 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);
 750
 751 void al_print(const char *func, const char *fmt, ...) PRINTF_STYLE(2,3);
 752 #define AL_PRINT(...) al_print(__FUNCTION__, __VA_ARGS__)
 753
 754 extern FILE *LogFile;
 755 enum LogLevel {
 756     NoLog,
 757     LogError,
 758     LogWarning,
 759     LogTrace,
 760     LogRef
 761 };
 762 extern enum LogLevel LogLevel;
 763
 764 #define TRACEREF(...) do {                                                    \
 765     if(LogLevel >= LogRef)                                                    \
 766         AL_PRINT(__VA_ARGS__);                                                \
 767 } while(0)
 768
 769 #define TRACE(...) do {                                                       \
 770     if(LogLevel >= LogTrace)                                                  \
 771         AL_PRINT(__VA_ARGS__);                                                \
 772 } while(0)
 773
 774 #define WARN(...) do {                                                        \
 775     if(LogLevel >= LogWarning)                                                \
 776         AL_PRINT(__VA_ARGS__);                                                \
 777 } while(0)
 778
 779 #define ERR(...) do {                                                         \
 780     if(LogLevel >= LogError)                                                  \
 781         AL_PRINT(__VA_ARGS__);                                                \
 782 } while(0)
 783
 784
 785 extern ALint RTPrioLevel;
 786
 787 #ifdef __cplusplus
 788 }
 789 #endif
 790
 791 #endif