summaryrefslogtreecommitdiffstats
path: root/OpenAL32/Include/alMain.h
blob: 82d17b639572654050b811c928d563cfc691f075 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
#ifndef AL_MAIN_H
#define AL_MAIN_H

#include <string.h>
#include <stdio.h>
#include <stdarg.h>

#ifdef HAVE_FENV_H
#include <fenv.h>
#endif

#include "AL/al.h"
#include "AL/alc.h"
#include "AL/alext.h"

/* Sample types */
#define AL_BYTE                                  0x1400
#define AL_UNSIGNED_BYTE                         0x1401
#define AL_SHORT                                 0x1402
#define AL_UNSIGNED_SHORT                        0x1403
#define AL_INT                                   0x1404
#define AL_UNSIGNED_INT                          0x1405
#define AL_FLOAT                                 0x1406
#define AL_DOUBLE                                0x1407
#define AL_BYTE3                                 0x1408
#define AL_UNSIGNED_BYTE3                        0x1409
#define AL_MULAW                                 0x1410
#define AL_IMA4                                  0x1411

/* Channel configurations */
#define AL_MONO                                  0x1500
#define AL_STEREO                                0x1501
#define AL_REAR                                  0x1502
#define AL_QUAD                                  0x1503
#define AL_5POINT1                               0x1504 /* (WFX order) */
#define AL_6POINT1                               0x1505 /* (WFX order) */
#define AL_7POINT1                               0x1506 /* (WFX order) */

/* Storage formats */
#define AL_MONO8                                 0x1100
#define AL_MONO16                                0x1101
#define AL_MONO32F                               0x10010
#define AL_STEREO8                               0x1102
#define AL_STEREO16                              0x1103
#define AL_STEREO32F                             0x10011
#define AL_QUAD8                                 0x1204
#define AL_QUAD16                                0x1205
#define AL_QUAD32F                               0x1206
#define AL_REAR8                                 0x1207
#define AL_REAR16                                0x1208
#define AL_REAR32F                               0x1209
#define AL_5POINT1_8                             0x120A
#define AL_5POINT1_16                            0x120B
#define AL_5POINT1_32F                           0x120C
#define AL_6POINT1_8                             0x120D
#define AL_6POINT1_16                            0x120E
#define AL_6POINT1_32F                           0x120F
#define AL_7POINT1_8                             0x1210
#define AL_7POINT1_16                            0x1211
#define AL_7POINT1_32F                           0x1212

#ifndef ALC_SOFT_device_loopback
#define ALC_SOFT_device_loopback 1
#define ALC_FORMAT_CHANNELS_SOFT                 0x1990
#define ALC_FORMAT_TYPE_SOFT                     0x1991
typedef ALCdevice* (ALC_APIENTRY*LPALCLOOPBACKOPENDEVICESOFT)(void);
typedef ALCboolean (ALC_APIENTRY*LPALCISRENDERFORMATSUPPORTEDSOFT)(ALCdevice *device, ALCsizei freq, ALenum channels, ALenum type);
typedef void (ALC_APIENTRY*LPALCRENDERSAMPLESSOFT)(ALCdevice *device, ALCvoid *buffer, ALCsizei samples);
#ifdef AL_ALEXT_PROTOTYPES
ALC_API ALCdevice* ALC_APIENTRY alcLoopbackOpenDeviceSOFT(void);
ALC_API ALCboolean ALC_APIENTRY alcIsRenderFormatSupportedSOFT(ALCdevice *device, ALCsizei freq, ALenum channels, ALenum type);
ALC_API void ALC_APIENTRY alcRenderSamplesSOFT(ALCdevice *device, ALCvoid *buffer, ALCsizei samples);
#endif
#endif

#ifndef AL_SOFT_buffer_samples
#define AL_SOFT_buffer_samples 1
typedef void (AL_APIENTRY*LPALBUFFERSAMPLESSOFT)(ALuint,ALuint,ALenum,ALsizei,ALenum,ALenum,const ALvoid*);
typedef void (AL_APIENTRY*LPALBUFFERSUBSAMPLESSOFT)(ALuint,ALsizei,ALsizei,ALenum,ALenum,const ALvoid*);
typedef void (AL_APIENTRY*LPALGETBUFFERSAMPLESSOFT)(ALuint,ALsizei,ALsizei,ALenum,ALenum,ALvoid*);
typedef ALboolean (AL_APIENTRY*LPALISBUFFERFORMATSUPPORTEDSOFT)(ALenum);
#ifdef AL_ALEXT_PROTOTYPES
AL_API void AL_APIENTRY alBufferSamplesSOFT(ALuint buffer,
    ALuint samplerate, ALenum internalformat, ALsizei frames,
    ALenum channels, ALenum type, const ALvoid *data);
AL_API void AL_APIENTRY alBufferSubSamplesSOFT(ALuint buffer,
    ALsizei offset, ALsizei frames,
    ALenum channels, ALenum type, const ALvoid *data);
AL_API void AL_APIENTRY alGetBufferSamplesSOFT(ALuint buffer,
    ALsizei offset, ALsizei frames,
    ALenum channels, ALenum type, ALvoid *data);
AL_API ALboolean AL_APIENTRY alIsBufferFormatSupportedSOFT(ALenum format);
#endif
#endif

#ifndef AL_EXT_sample_buffer_object
#define AL_EXT_sample_buffer_object 1
typedef ptrdiff_t ALintptrEXT;
typedef ptrdiff_t ALsizeiptrEXT;
#define AL_SAMPLE_SOURCE_EXT                     0x1040
#define AL_SAMPLE_SINK_EXT                       0x1041
#define AL_READ_ONLY_EXT                         0x1042
#define AL_WRITE_ONLY_EXT                        0x1043
#define AL_READ_WRITE_EXT                        0x1044
#define AL_STREAM_WRITE_EXT                      0x1045
#define AL_STREAM_READ_EXT                       0x1046
#define AL_STREAM_COPY_EXT                       0x1047
#define AL_STATIC_WRITE_EXT                      0x1048
#define AL_STATIC_READ_EXT                       0x1049
#define AL_STATIC_COPY_EXT                       0x104A
#define AL_DYNAMIC_WRITE_EXT                     0x104B
#define AL_DYNAMIC_READ_EXT                      0x104C
#define AL_DYNAMIC_COPY_EXT                      0x104D
typedef ALvoid (AL_APIENTRY*PFNALGENDATABUFFERSEXTPROC)(ALsizei n,ALuint *puiBuffers);
typedef ALvoid (AL_APIENTRY*PFNALDELETEDATABUFFERSEXTPROC)(ALsizei n, const ALuint *puiBuffers);
typedef ALboolean (AL_APIENTRY*PFNALISDATABUFFEREXTPROC)(ALuint uiBuffer);
typedef ALvoid (AL_APIENTRY*PFNALDATABUFFERDATAEXTPROC)(ALuint buffer,const ALvoid *data,ALsizeiptrEXT size,ALenum usage);
typedef ALvoid (AL_APIENTRY*PFNALDATABUFFERSUBDATAEXTPROC)(ALuint buffer, ALintptrEXT start, ALsizeiptrEXT length, const ALvoid *);
typedef ALvoid (AL_APIENTRY*PFNALGETDATABUFFERSUBDATAEXTPROC)(ALuint buffer, ALintptrEXT start, ALsizeiptrEXT length, ALvoid *);
typedef ALvoid (AL_APIENTRY*PFNALDATABUFFERFEXTPROC)(ALuint buffer, ALenum eParam, ALfloat flValue);
typedef ALvoid (AL_APIENTRY*PFNALDATABUFFERFVEXTPROC)(ALuint buffer, ALenum eParam, const ALfloat* flValues);
typedef ALvoid (AL_APIENTRY*PFNALDATABUFFERIEXTPROC)(ALuint buffer, ALenum eParam, ALint lValue);
typedef ALvoid (AL_APIENTRY*PFNALDATABUFFERIVEXTPROC)(ALuint buffer, ALenum eParam, const ALint* plValues);
typedef ALvoid (AL_APIENTRY*PFNALGETDATABUFFERFEXTPROC)(ALuint buffer, ALenum eParam, ALfloat *pflValue);
typedef ALvoid (AL_APIENTRY*PFNALGETDATABUFFERFVEXTPROC)(ALuint buffer, ALenum eParam, ALfloat* pflValues);
typedef ALvoid (AL_APIENTRY*PFNALGETDATABUFFERIEXTPROC)(ALuint buffer, ALenum eParam, ALint *plValue);
typedef ALvoid (AL_APIENTRY*PFNALGETDATABUFFERIVEXTPROC)(ALuint buffer, ALenum eParam, ALint* plValues);
typedef ALvoid (AL_APIENTRY*PFNALSELECTDATABUFFEREXTPROC)(ALenum target, ALuint uiBuffer);
typedef ALvoid* (AL_APIENTRY*PFNALMAPDATABUFFEREXTPROC)(ALuint uiBuffer, ALintptrEXT start, ALsizeiptrEXT length, ALenum access);
typedef ALvoid (AL_APIENTRY*PFNALUNMAPDATABUFFEREXTPROC)(ALuint uiBuffer);
#ifdef AL_ALEXT_PROTOTYPES
AL_API ALvoid AL_APIENTRY alGenDatabuffersEXT(ALsizei n,ALuint *puiBuffers);
AL_API ALvoid AL_APIENTRY alDeleteDatabuffersEXT(ALsizei n, const ALuint *puiBuffers);
AL_API ALboolean AL_APIENTRY alIsDatabufferEXT(ALuint uiBuffer);
AL_API ALvoid AL_APIENTRY alDatabufferDataEXT(ALuint buffer,const ALvoid *data,ALsizeiptrEXT size,ALenum usage);
AL_API ALvoid AL_APIENTRY alDatabufferSubDataEXT(ALuint buffer, ALintptrEXT start, ALsizeiptrEXT length, const ALvoid *data);
AL_API ALvoid AL_APIENTRY alGetDatabufferSubDataEXT(ALuint buffer, ALintptrEXT start, ALsizeiptrEXT length, ALvoid *data);
AL_API ALvoid AL_APIENTRY alDatabufferfEXT(ALuint buffer, ALenum eParam, ALfloat flValue);
AL_API ALvoid AL_APIENTRY alDatabufferfvEXT(ALuint buffer, ALenum eParam, const ALfloat* flValues);
AL_API ALvoid AL_APIENTRY alDatabufferiEXT(ALuint buffer, ALenum eParam, ALint lValue);
AL_API ALvoid AL_APIENTRY alDatabufferivEXT(ALuint buffer, ALenum eParam, const ALint* plValues);
AL_API ALvoid AL_APIENTRY alGetDatabufferfEXT(ALuint buffer, ALenum eParam, ALfloat *pflValue);
AL_API ALvoid AL_APIENTRY alGetDatabufferfvEXT(ALuint buffer, ALenum eParam, ALfloat* pflValues);
AL_API ALvoid AL_APIENTRY alGetDatabufferiEXT(ALuint buffer, ALenum eParam, ALint *plValue);
AL_API ALvoid AL_APIENTRY alGetDatabufferivEXT(ALuint buffer, ALenum eParam, ALint* plValues);
AL_API ALvoid AL_APIENTRY alSelectDatabufferEXT(ALenum target, ALuint uiBuffer);
AL_API ALvoid* AL_APIENTRY alMapDatabufferEXT(ALuint uiBuffer, ALintptrEXT start, ALsizeiptrEXT length, ALenum access);
AL_API ALvoid AL_APIENTRY alUnmapDatabufferEXT(ALuint uiBuffer);
#endif
#endif


#if defined(HAVE_STDINT_H)
#include <stdint.h>
typedef int64_t ALint64;
typedef uint64_t ALuint64;
#elif defined(HAVE___INT64)
typedef __int64 ALint64;
typedef unsigned __int64 ALuint64;
#elif (SIZEOF_LONG == 8)
typedef long ALint64;
typedef unsigned long ALuint64;
#elif (SIZEOF_LONG_LONG == 8)
typedef long long ALint64;
typedef unsigned long long ALuint64;
#endif

#ifdef HAVE_GCC_FORMAT
#define PRINTF_STYLE(x, y) __attribute__((format(printf, (x), (y))))
#else
#define PRINTF_STYLE(x, y)
#endif

#if defined(HAVE_RESTRICT)
#define RESTRICT restrict
#elif defined(HAVE___RESTRICT)
#define RESTRICT __restrict
#else
#define RESTRICT
#endif

#ifdef _WIN32

#ifndef _WIN32_WINNT
#define _WIN32_WINNT 0x0500
#endif
#include <windows.h>

typedef DWORD tls_type;
#define tls_create(x) (*(x) = TlsAlloc())
#define tls_delete(x) TlsFree((x))
#define tls_get(x) TlsGetValue((x))
#define tls_set(x, a) TlsSetValue((x), (a))

#else

#include <unistd.h>
#include <assert.h>
#include <pthread.h>
#ifdef HAVE_PTHREAD_NP_H
#include <pthread_np.h>
#endif
#include <sys/time.h>
#include <time.h>
#include <errno.h>

#define IsBadWritePtr(a,b) ((a) == NULL && (b) != 0)

typedef pthread_key_t tls_type;
#define tls_create(x) pthread_key_create((x), NULL)
#define tls_delete(x) pthread_key_delete((x))
#define tls_get(x) pthread_getspecific((x))
#define tls_set(x, a) pthread_setspecific((x), (a))

typedef pthread_mutex_t CRITICAL_SECTION;
static __inline void EnterCriticalSection(CRITICAL_SECTION *cs)
{
    int ret;
    ret = pthread_mutex_lock(cs);
    assert(ret == 0);
}
static __inline void LeaveCriticalSection(CRITICAL_SECTION *cs)
{
    int ret;
    ret = pthread_mutex_unlock(cs);
    assert(ret == 0);
}
static __inline void InitializeCriticalSection(CRITICAL_SECTION *cs)
{
    pthread_mutexattr_t attrib;
    int ret;

    ret = pthread_mutexattr_init(&attrib);
    assert(ret == 0);

    ret = pthread_mutexattr_settype(&attrib, PTHREAD_MUTEX_RECURSIVE);
#ifdef HAVE_PTHREAD_NP_H
    if(ret != 0)
        ret = pthread_mutexattr_setkind_np(&attrib, PTHREAD_MUTEX_RECURSIVE);
#endif
    assert(ret == 0);
    ret = pthread_mutex_init(cs, &attrib);
    assert(ret == 0);

    pthread_mutexattr_destroy(&attrib);
}
static __inline void DeleteCriticalSection(CRITICAL_SECTION *cs)
{
    int ret;
    ret = pthread_mutex_destroy(cs);
    assert(ret == 0);
}

/* NOTE: This wrapper isn't quite accurate as it returns an ALuint, as opposed
 * to the expected DWORD. Both are defined as unsigned 32-bit types, however.
 * Additionally, Win32 is supposed to measure the time since Windows started,
 * as opposed to the actual time. */
static __inline ALuint timeGetTime(void)
{
#if _POSIX_TIMERS > 0
    struct timespec ts;
    int ret = -1;

#if defined(_POSIX_MONOTONIC_CLOCK) && (_POSIX_MONOTONIC_CLOCK >= 0)
#if _POSIX_MONOTONIC_CLOCK == 0
    static int hasmono = 0;
    if(hasmono > 0 || (hasmono == 0 &&
                       (hasmono=sysconf(_SC_MONOTONIC_CLOCK)) > 0))
#endif
        ret = clock_gettime(CLOCK_MONOTONIC, &ts);
#endif
    if(ret != 0)
        ret = clock_gettime(CLOCK_REALTIME, &ts);
    assert(ret == 0);

    return ts.tv_nsec/1000000 + ts.tv_sec*1000;
#else
    struct timeval tv;
    int ret;

    ret = gettimeofday(&tv, NULL);
    assert(ret == 0);

    return tv.tv_usec/1000 + tv.tv_sec*1000;
#endif
}

static __inline void Sleep(ALuint t)
{
    struct timespec tv, rem;
    tv.tv_nsec = (t*1000000)%1000000000;
    tv.tv_sec = t/1000;

    while(nanosleep(&tv, &rem) == -1 && errno == EINTR)
        tv = rem;
}
#define min(x,y) (((x)<(y))?(x):(y))
#define max(x,y) (((x)>(y))?(x):(y))
#endif

#include "alListener.h"
#include "alu.h"

#ifdef __cplusplus
extern "C" {
#endif


#define DEFAULT_OUTPUT_RATE        (44100)

#define SPEEDOFSOUNDMETRESPERSEC   (343.3f)
#define AIRABSORBGAINDBHF          (-0.05f)

#define LOWPASSFREQCUTOFF          (5000)


// Find the next power-of-2 for non-power-of-2 numbers.
static __inline ALuint NextPowerOf2(ALuint value)
{
    ALuint powerOf2 = 1;

    if(value)
    {
        value--;
        while(value)
        {
            value >>= 1;
            powerOf2 <<= 1;
        }
    }
    return powerOf2;
}


typedef struct {
    ALCboolean (*OpenPlayback)(ALCdevice*, const ALCchar*);
    void (*ClosePlayback)(ALCdevice*);
    ALCboolean (*ResetPlayback)(ALCdevice*);
    void (*StopPlayback)(ALCdevice*);

    ALCboolean (*OpenCapture)(ALCdevice*, const ALCchar*);
    void (*CloseCapture)(ALCdevice*);
    void (*StartCapture)(ALCdevice*);
    void (*StopCapture)(ALCdevice*);
    void (*CaptureSamples)(ALCdevice*, void*, ALCuint);
    ALCuint (*AvailableSamples)(ALCdevice*);
} BackendFuncs;

enum {
    DEVICE_PROBE,
    ALL_DEVICE_PROBE,
    CAPTURE_DEVICE_PROBE
};

void alc_alsa_init(BackendFuncs *func_list);
void alc_alsa_deinit(void);
void alc_alsa_probe(int type);
void alc_oss_init(BackendFuncs *func_list);
void alc_oss_deinit(void);
void alc_oss_probe(int type);
void alc_solaris_init(BackendFuncs *func_list);
void alc_solaris_deinit(void);
void alc_solaris_probe(int type);
void alcMMDevApiInit(BackendFuncs *func_list);
void alcMMDevApiDeinit(void);
void alcMMDevApiProbe(int type);
void alcDSoundInit(BackendFuncs *func_list);
void alcDSoundDeinit(void);
void alcDSoundProbe(int type);
void alcWinMMInit(BackendFuncs *FuncList);
void alcWinMMDeinit(void);
void alcWinMMProbe(int type);
void alc_pa_init(BackendFuncs *func_list);
void alc_pa_deinit(void);
void alc_pa_probe(int type);
void alc_wave_init(BackendFuncs *func_list);
void alc_wave_deinit(void);
void alc_wave_probe(int type);
void alc_pulse_init(BackendFuncs *func_list);
void alc_pulse_deinit(void);
void alc_pulse_probe(int type);
void alc_ca_init(BackendFuncs *func_list);
void alc_ca_deinit(void);
void alc_ca_probe(int type);
void alc_null_init(BackendFuncs *func_list);
void alc_null_deinit(void);
void alc_null_probe(int type);
void alc_loopback_init(BackendFuncs *func_list);
void alc_loopback_deinit(void);
void alc_loopback_probe(int type);


typedef struct UIntMap {
    struct {
        ALuint key;
        ALvoid *value;
    } *array;
    ALsizei size;
    ALsizei maxsize;
} UIntMap;

void InitUIntMap(UIntMap *map);
void ResetUIntMap(UIntMap *map);
ALenum InsertUIntMapEntry(UIntMap *map, ALuint key, ALvoid *value);
void RemoveUIntMapKey(UIntMap *map, ALuint key);
ALvoid *LookupUIntMapKey(UIntMap *map, ALuint key);

/* Device formats */
enum DevFmtType {
    DevFmtByte   = AL_BYTE,
    DevFmtUByte  = AL_UNSIGNED_BYTE,
    DevFmtShort  = AL_SHORT,
    DevFmtUShort = AL_UNSIGNED_SHORT,
    DevFmtFloat  = AL_FLOAT
};
enum DevFmtChannels {
    DevFmtMono   = AL_MONO,
    DevFmtStereo = AL_STEREO,
    DevFmtQuad   = AL_QUAD,
    DevFmtX51    = AL_5POINT1,
    DevFmtX61    = AL_6POINT1,
    DevFmtX71    = AL_7POINT1
};

ALuint BytesFromDevFmt(enum DevFmtType type);
ALuint ChannelsFromDevFmt(enum DevFmtChannels chans);
static __inline ALuint FrameSizeFromDevFmt(enum DevFmtChannels chans,
                                           enum DevFmtType type)
{
    return ChannelsFromDevFmt(chans) * BytesFromDevFmt(type);
}


extern const struct EffectList {
    const char *name;
    int type;
    const char *ename;
    ALenum val;
} EffectList[];


struct ALCdevice_struct
{
    ALCboolean   Connected;
    ALboolean    IsCaptureDevice;
    ALboolean    IsLoopbackDevice;

    ALuint       Frequency;
    ALuint       UpdateSize;
    ALuint       NumUpdates;
    enum DevFmtChannels FmtChans;
    enum DevFmtType     FmtType;

    ALCchar      *szDeviceName;

    ALCenum      LastError;

    // Maximum number of sources that can be created
    ALuint       MaxNoOfSources;
    // Maximum number of slots that can be created
    ALuint       AuxiliaryEffectSlotMax;

    ALCuint      NumMonoSources;
    ALCuint      NumStereoSources;
    ALuint       NumAuxSends;

    // Map of Buffers for this device
    UIntMap BufferMap;

    // Map of Effects for this device
    UIntMap EffectMap;

    // Map of Filters for this device
    UIntMap FilterMap;

    // Map of Databuffers for this device
    UIntMap DatabufferMap;

    // Stereo-to-binaural filter
    struct bs2b *Bs2b;
    ALCint       Bs2bLevel;

    // Device flags
    ALuint       Flags;

    // Dry path buffer mix
    ALfloat DryBuffer[BUFFERSIZE][MAXCHANNELS];

    ALuint DevChannels[MAXCHANNELS];

    Channel Speaker2Chan[MAXCHANNELS];
    ALfloat PanningLUT[LUT_NUM][MAXCHANNELS];
    ALuint  NumChan;

    ALfloat ClickRemoval[MAXCHANNELS];
    ALfloat PendingClicks[MAXCHANNELS];

    // Contexts created on this device
    ALCcontext  **Contexts;
    ALuint        NumContexts;

    BackendFuncs *Funcs;
    void         *ExtraData; // For the backend's use

    ALCdevice *next;
};

#define ALCdevice_OpenPlayback(a,b)      ((a)->Funcs->OpenPlayback((a), (b)))
#define ALCdevice_ClosePlayback(a)       ((a)->Funcs->ClosePlayback((a)))
#define ALCdevice_ResetPlayback(a)       ((a)->Funcs->ResetPlayback((a)))
#define ALCdevice_StopPlayback(a)        ((a)->Funcs->StopPlayback((a)))
#define ALCdevice_OpenCapture(a,b)       ((a)->Funcs->OpenCapture((a), (b)))
#define ALCdevice_CloseCapture(a)        ((a)->Funcs->CloseCapture((a)))
#define ALCdevice_StartCapture(a)        ((a)->Funcs->StartCapture((a)))
#define ALCdevice_StopCapture(a)         ((a)->Funcs->StopCapture((a)))
#define ALCdevice_CaptureSamples(a,b,c)  ((a)->Funcs->CaptureSamples((a), (b), (c)))
#define ALCdevice_AvailableSamples(a)    ((a)->Funcs->AvailableSamples((a)))

// Duplicate stereo sources on the side/rear channels
#define DEVICE_DUPLICATE_STEREO                  (1<<0)
// Use HRTF filters for mixing sounds
#define DEVICE_USE_HRTF                          (1<<1)
// Frequency was requested by the app or config file
#define DEVICE_FREQUENCY_REQUEST                 (1<<2)
// Channel configuration was requested by the config file
#define DEVICE_CHANNELS_REQUEST                  (1<<3)


struct ALCcontext_struct
{
    ALlistener  Listener;

    UIntMap SourceMap;
    UIntMap EffectSlotMap;

    struct ALdatabuffer *SampleSource;
    struct ALdatabuffer *SampleSink;

    ALenum      LastError;

    ALboolean   Suspended;

    ALenum      DistanceModel;
    ALboolean   SourceDistanceModel;

    ALfloat     DopplerFactor;
    ALfloat     DopplerVelocity;
    ALfloat     flSpeedOfSound;

    struct ALsource **ActiveSources;
    ALsizei           ActiveSourceCount;
    ALsizei           MaxActiveSources;

    ALCdevice  *Device;
    const ALCchar *ExtensionList;

    ALCcontext *next;
};

void AppendDeviceList(const ALCchar *name);
void AppendAllDeviceList(const ALCchar *name);
void AppendCaptureDeviceList(const ALCchar *name);

ALCvoid alcSetError(ALCdevice *device, ALenum errorCode);

ALCvoid SuspendContext(ALCcontext *context);
ALCvoid ProcessContext(ALCcontext *context);

ALvoid *StartThread(ALuint (*func)(ALvoid*), ALvoid *ptr);
ALuint StopThread(ALvoid *thread);

ALCcontext *GetContextSuspended(void);

typedef struct RingBuffer RingBuffer;
RingBuffer *CreateRingBuffer(ALsizei frame_size, ALsizei length);
void DestroyRingBuffer(RingBuffer *ring);
ALsizei RingBufferSize(RingBuffer *ring);
void WriteRingBuffer(RingBuffer *ring, const ALubyte *data, ALsizei len);
void ReadRingBuffer(RingBuffer *ring, ALubyte *data, ALsizei len);

void ReadALConfig(void);
void FreeALConfig(void);
int ConfigValueExists(const char *blockName, const char *keyName);
const char *GetConfigValue(const char *blockName, const char *keyName, const char *def);
int GetConfigValueInt(const char *blockName, const char *keyName, int def);
float GetConfigValueFloat(const char *blockName, const char *keyName, float def);
int GetConfigValueBool(const char *blockName, const char *keyName, int def);

void SetRTPriority(void);

void SetDefaultChannelOrder(ALCdevice *device);
void SetDefaultWFXChannelOrder(ALCdevice *device);

const ALCchar *DevFmtTypeString(enum DevFmtType type);
const ALCchar *DevFmtChannelsString(enum DevFmtChannels chans);

ALboolean IsValidType(ALenum type);
ALboolean IsValidChannels(ALenum type);

#define HRTF_BITS        (7)
#define HRTF_LENGTH      (1<<HRTF_BITS)
#define HRTF_LENGTH_MASK (HRTF_LENGTH-1)
void GetHrtfCoeffs(ALfloat elevation, ALfloat angle, const ALshort **left, const ALshort **right);

void al_print(const char *fname, unsigned int line, const char *fmt, ...)
             PRINTF_STYLE(3,4);
#define AL_PRINT(...) al_print(__FILE__, __LINE__, __VA_ARGS__)

extern ALdouble ConeScale;
extern ALdouble ZScale;

#ifdef __cplusplus
}
#endif

#endif