Alc/ALc.c

   1 /**
   2  * OpenAL cross platform audio library
   3  * Copyright (C) 1999-2007 by authors.
   4  * This library is free software; you can redistribute it and/or
   5  *  modify it under the terms of the GNU Library General Public
   6  *  License as published by the Free Software Foundation; either
   7  *  version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  *  Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Library General Public
  15  *  License along with this library; if not, write to the
  16  *  Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  *  Boston, MA  02111-1307, USA.
  18  * Or go to http://www.gnu.org/copyleft/lgpl.html
  19  */
  20
  21 #include "config.h"
  22
  23 #include <math.h>
  24 #include <stdlib.h>
  25 #include <stdio.h>
  26 #include <memory.h>
  27 #include <ctype.h>
  28 #include "alMain.h"
  29 #include "alSource.h"
  30 #include "AL/al.h"
  31 #include "AL/alc.h"
  32 #include "alThunk.h"
  33 #include "alSource.h"
  34 #include "alBuffer.h"
  35 #include "alExtension.h"
  36 #include "alAuxEffectSlot.h"
  37 #include "alDatabuffer.h"
  38 #include "bs2b.h"
  39 #include "alu.h"
  40
  41
  42 #define EmptyFuncs { NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL }
  43 typedef struct BackendInfo {
  44     const char *name;
  45     void (*Init)(BackendFuncs*);
  46     void (*Deinit)(void);
  47     void (*Probe)(int);
  48     BackendFuncs Funcs;
  49 } BackendInfo;
  50 static BackendInfo BackendList[] = {
  51 #ifdef HAVE_ALSA
  52     { "alsa", alc_alsa_init, alc_alsa_deinit, alc_alsa_probe, EmptyFuncs },
  53 #endif
  54 #ifdef HAVE_OSS
  55     { "oss", alc_oss_init, alc_oss_deinit, alc_oss_probe, EmptyFuncs },
  56 #endif
  57 #ifdef HAVE_SOLARIS
  58     { "solaris", alc_solaris_init, alc_solaris_deinit, alc_solaris_probe, EmptyFuncs },
  59 #endif
  60 #ifdef HAVE_DSOUND
  61     { "dsound", alcDSoundInit, alcDSoundDeinit, alcDSoundProbe, EmptyFuncs },
  62 #endif
  63 #ifdef HAVE_WINMM
  64     { "winmm", alcWinMMInit, alcWinMMDeinit, alcWinMMProbe, EmptyFuncs },
  65 #endif
  66 #ifdef HAVE_PORTAUDIO
  67     { "port", alc_pa_init, alc_pa_deinit, alc_pa_probe, EmptyFuncs },
  68 #endif
  69 #ifdef HAVE_PULSEAUDIO
  70     { "pulse", alc_pulse_init, alc_pulse_deinit, alc_pulse_probe, EmptyFuncs },
  71 #endif
  72
  73     { "wave", alc_wave_init, alc_wave_deinit, alc_wave_probe, EmptyFuncs },
  74
  75     { NULL, NULL, NULL, NULL, EmptyFuncs }
  76 };
  77 #undef EmptyFuncs
  78
  79 ///////////////////////////////////////////////////////
  80
  81 #define ALC_EFX_MAJOR_VERSION                              0x20001
  82 #define ALC_EFX_MINOR_VERSION                              0x20002
  83 #define ALC_MAX_AUXILIARY_SENDS                            0x20003
  84
  85 ///////////////////////////////////////////////////////
  86 // STRING and EXTENSIONS
  87
  88 typedef struct ALCfunction_struct
  89 {
  90     ALCchar        *funcName;
  91     ALvoid        *address;
  92 } ALCfunction;
  93
  94 static ALCfunction  alcFunctions[] = {
  95     { "alcCreateContext",           (ALvoid *) alcCreateContext         },
  96     { "alcMakeContextCurrent",      (ALvoid *) alcMakeContextCurrent    },
  97     { "alcProcessContext",          (ALvoid *) alcProcessContext        },
  98     { "alcSuspendContext",          (ALvoid *) alcSuspendContext        },
  99     { "alcDestroyContext",          (ALvoid *) alcDestroyContext        },
 100     { "alcGetCurrentContext",       (ALvoid *) alcGetCurrentContext     },
 101     { "alcGetContextsDevice",       (ALvoid *) alcGetContextsDevice     },
 102     { "alcOpenDevice",              (ALvoid *) alcOpenDevice            },
 103     { "alcCloseDevice",             (ALvoid *) alcCloseDevice           },
 104     { "alcGetError",                (ALvoid *) alcGetError              },
 105     { "alcIsExtensionPresent",      (ALvoid *) alcIsExtensionPresent    },
 106     { "alcGetProcAddress",          (ALvoid *) alcGetProcAddress        },
 107     { "alcGetEnumValue",            (ALvoid *) alcGetEnumValue          },
 108     { "alcGetString",               (ALvoid *) alcGetString             },
 109     { "alcGetIntegerv",             (ALvoid *) alcGetIntegerv           },
 110     { "alcCaptureOpenDevice",       (ALvoid *) alcCaptureOpenDevice     },
 111     { "alcCaptureCloseDevice",      (ALvoid *) alcCaptureCloseDevice    },
 112     { "alcCaptureStart",            (ALvoid *) alcCaptureStart          },
 113     { "alcCaptureStop",             (ALvoid *) alcCaptureStop           },
 114     { "alcCaptureSamples",          (ALvoid *) alcCaptureSamples        },
 115
 116     { "alcMakeCurrent",             (ALvoid *) alcMakeCurrent           },
 117     { "alcGetThreadContext",        (ALvoid *) alcGetThreadContext      },
 118
 119     { NULL,                         (ALvoid *) NULL                     }
 120 };
 121
 122 static ALenums enumeration[]={
 123     // Types
 124     { (ALchar *)"ALC_INVALID",                          ALC_INVALID                         },
 125     { (ALchar *)"ALC_FALSE",                            ALC_FALSE                           },
 126     { (ALchar *)"ALC_TRUE",                             ALC_TRUE                            },
 127
 128     // ALC Properties
 129     { (ALchar *)"ALC_MAJOR_VERSION",                    ALC_MAJOR_VERSION                   },
 130     { (ALchar *)"ALC_MINOR_VERSION",                    ALC_MINOR_VERSION                   },
 131     { (ALchar *)"ALC_ATTRIBUTES_SIZE",                  ALC_ATTRIBUTES_SIZE                 },
 132     { (ALchar *)"ALC_ALL_ATTRIBUTES",                   ALC_ALL_ATTRIBUTES                  },
 133     { (ALchar *)"ALC_DEFAULT_DEVICE_SPECIFIER",         ALC_DEFAULT_DEVICE_SPECIFIER        },
 134     { (ALchar *)"ALC_DEVICE_SPECIFIER",                 ALC_DEVICE_SPECIFIER                },
 135     { (ALchar *)"ALC_ALL_DEVICES_SPECIFIER",            ALC_ALL_DEVICES_SPECIFIER           },
 136     { (ALchar *)"ALC_DEFAULT_ALL_DEVICES_SPECIFIER",    ALC_DEFAULT_ALL_DEVICES_SPECIFIER   },
 137     { (ALchar *)"ALC_EXTENSIONS",                       ALC_EXTENSIONS                      },
 138     { (ALchar *)"ALC_FREQUENCY",                        ALC_FREQUENCY                       },
 139     { (ALchar *)"ALC_REFRESH",                          ALC_REFRESH                         },
 140     { (ALchar *)"ALC_SYNC",                             ALC_SYNC                            },
 141     { (ALchar *)"ALC_MONO_SOURCES",                     ALC_MONO_SOURCES                    },
 142     { (ALchar *)"ALC_STEREO_SOURCES",                   ALC_STEREO_SOURCES                  },
 143     { (ALchar *)"ALC_CAPTURE_DEVICE_SPECIFIER",         ALC_CAPTURE_DEVICE_SPECIFIER        },
 144     { (ALchar *)"ALC_CAPTURE_DEFAULT_DEVICE_SPECIFIER", ALC_CAPTURE_DEFAULT_DEVICE_SPECIFIER},
 145     { (ALchar *)"ALC_CAPTURE_SAMPLES",                  ALC_CAPTURE_SAMPLES                 },
 146
 147     // EFX Properties
 148     { (ALchar *)"ALC_EFX_MAJOR_VERSION",                ALC_EFX_MAJOR_VERSION               },
 149     { (ALchar *)"ALC_EFX_MINOR_VERSION",                ALC_EFX_MINOR_VERSION               },
 150     { (ALchar *)"ALC_MAX_AUXILIARY_SENDS",              ALC_MAX_AUXILIARY_SENDS             },
 151
 152     // ALC Error Message
 153     { (ALchar *)"ALC_NO_ERROR",                         ALC_NO_ERROR                        },
 154     { (ALchar *)"ALC_INVALID_DEVICE",                   ALC_INVALID_DEVICE                  },
 155     { (ALchar *)"ALC_INVALID_CONTEXT",                  ALC_INVALID_CONTEXT                 },
 156     { (ALchar *)"ALC_INVALID_ENUM",                     ALC_INVALID_ENUM                    },
 157     { (ALchar *)"ALC_INVALID_VALUE",                    ALC_INVALID_VALUE                   },
 158     { (ALchar *)"ALC_OUT_OF_MEMORY",                    ALC_OUT_OF_MEMORY                   },
 159     { (ALchar *)NULL,                                   (ALenum)0 }
 160 };
 161 // Error strings
 162 static const ALCchar alcNoError[] = "No Error";
 163 static const ALCchar alcErrInvalidDevice[] = "Invalid Device";
 164 static const ALCchar alcErrInvalidContext[] = "Invalid Context";
 165 static const ALCchar alcErrInvalidEnum[] = "Invalid Enum";
 166 static const ALCchar alcErrInvalidValue[] = "Invalid Value";
 167 static const ALCchar alcErrOutOfMemory[] = "Out of Memory";
 168
 169 /* Device lists. Sizes only include the first ending null character, not the
 170  * second */
 171 static ALCchar *alcDeviceList;
 172 static ALCuint alcDeviceListSize;
 173 static ALCchar *alcAllDeviceList;
 174 static ALCuint alcAllDeviceListSize;
 175 static ALCchar *alcCaptureDeviceList;
 176 static ALCuint alcCaptureDeviceListSize;
 177 // Default is always the first in the list
 178 static ALCchar *alcDefaultDeviceSpecifier;
 179 static ALCchar *alcDefaultAllDeviceSpecifier;
 180 static ALCchar *alcCaptureDefaultDeviceSpecifier;
 181
 182
 183 static ALCchar alcExtensionList[] = "ALC_ENUMERATE_ALL_EXT ALC_ENUMERATION_EXT ALC_EXT_CAPTURE ALC_EXT_disconnect ALC_EXT_EFX ALC_EXTX_thread_local_context";
 184 static ALCint alcMajorVersion = 1;
 185 static ALCint alcMinorVersion = 1;
 186
 187 static ALCint alcEFXMajorVersion = 1;
 188 static ALCint alcEFXMinorVersion = 0;
 189
 190 ///////////////////////////////////////////////////////
 191
 192
 193 ///////////////////////////////////////////////////////
 194 // Global Variables
 195
 196 static ALCdevice *g_pDeviceList = NULL;
 197 static ALCuint    g_ulDeviceCount = 0;
 198
 199 static CRITICAL_SECTION g_csMutex;
 200
 201 // Context List
 202 static ALCcontext *g_pContextList = NULL;
 203 static ALCuint     g_ulContextCount = 0;
 204
 205 // Thread-local current context
 206 static tls_type LocalContext;
 207
 208 // Context Error
 209 static ALCenum g_eLastContextError = ALC_NO_ERROR;
 210
 211 ///////////////////////////////////////////////////////
 212
 213
 214 ///////////////////////////////////////////////////////
 215 // ALC Related helper functions
 216 #ifdef _WIN32
 217 static void alc_init(void);
 218 static void alc_deinit(void);
 219
 220 BOOL APIENTRY DllMain(HANDLE hModule,DWORD ul_reason_for_call,LPVOID lpReserved)
 221 {
 222     (void)lpReserved;
 223
 224     // Perform actions based on the reason for calling.
 225     switch(ul_reason_for_call)
 226     {
 227         case DLL_PROCESS_ATTACH:
 228             DisableThreadLibraryCalls(hModule);
 229             alc_init();
 230             break;
 231
 232         case DLL_PROCESS_DETACH:
 233             alc_deinit();
 234             break;
 235     }
 236     return TRUE;
 237 }
 238 #else
 239 #ifdef HAVE_GCC_DESTRUCTOR
 240 static void alc_init(void) __attribute__((constructor));
 241 static void alc_deinit(void) __attribute__((destructor));
 242 #endif
 243 #endif
 244
 245 static void alc_init(void)
 246 {
 247     int i;
 248     const char *devs, *str;
 249
 250     InitializeCriticalSection(&g_csMutex);
 251     ALTHUNK_INIT();
 252     ReadALConfig();
 253
 254     tls_create(&LocalContext);
 255
 256     devs = GetConfigValue(NULL, "drivers", "");
 257     if(devs[0])
 258     {
 259         int n;
 260         size_t len;
 261         const char *next = devs;
 262
 263         i = 0;
 264         do {
 265             devs = next;
 266             next = strchr(devs, ',');
 267
 268             if(!devs[0] || devs[0] == ',')
 269                 continue;
 270
 271             len = (next ? ((size_t)(next-devs)) : strlen(devs));
 272             for(n = i;BackendList[n].Init;n++)
 273             {
 274                 if(len == strlen(BackendList[n].name) &&
 275                    strncmp(BackendList[n].name, devs, len) == 0)
 276                 {
 277                     BackendInfo Bkp = BackendList[i];
 278                     BackendList[i] = BackendList[n];
 279                     BackendList[n] = Bkp;
 280
 281                     i++;
 282                 }
 283             }
 284         } while(next++);
 285
 286         BackendList[i].name = NULL;
 287         BackendList[i].Init = NULL;
 288         BackendList[i].Deinit = NULL;
 289         BackendList[i].Probe = NULL;
 290     }
 291
 292     for(i = 0;BackendList[i].Init;i++)
 293     {
 294         BackendList[i].Init(&BackendList[i].Funcs);
 295
 296         BackendList[i].Probe(DEVICE_PROBE);
 297         BackendList[i].Probe(ALL_DEVICE_PROBE);
 298         BackendList[i].Probe(CAPTURE_DEVICE_PROBE);
 299     }
 300
 301     DuplicateStereo = GetConfigValueBool(NULL, "stereodup", 0);
 302
 303     str = GetConfigValue(NULL, "excludefx", "");
 304     if(str[0])
 305     {
 306         const struct {
 307             const char *name;
 308             int type;
 309         } EffectList[] = {
 310             { "eaxreverb", EAXREVERB },
 311             { "reverb", REVERB },
 312             { "echo", ECHO },
 313             { NULL, 0 }
 314         };
 315         int n;
 316         size_t len;
 317         const char *next = str;
 318
 319         do {
 320             str = next;
 321             next = strchr(str, ',');
 322
 323             if(!str[0] || next == str)
 324                 continue;
 325
 326             len = (next ? ((size_t)(next-str)) : strlen(str));
 327             for(n = 0;EffectList[n].name;n++)
 328             {
 329                 if(len == strlen(EffectList[n].name) &&
 330                    strncmp(EffectList[n].name, str, len) == 0)
 331                     DisabledEffects[EffectList[n].type] = AL_TRUE;
 332             }
 333         } while(next++);
 334     }
 335 }
 336
 337 static void alc_deinit(void)
 338 {
 339     int i;
 340
 341     ReleaseALC();
 342
 343     for(i = 0;BackendList[i].Deinit;i++)
 344         BackendList[i].Deinit();
 345
 346     tls_delete(LocalContext);
 347
 348     FreeALConfig();
 349     ALTHUNK_EXIT();
 350     DeleteCriticalSection(&g_csMutex);
 351 }
 352
 353
 354 static void ProbeDeviceList()
 355 {
 356     ALint i;
 357
 358     free(alcDeviceList); alcDeviceList = NULL;
 359     alcDeviceListSize = 0;
 360
 361     for(i = 0;BackendList[i].Probe;i++)
 362         BackendList[i].Probe(DEVICE_PROBE);
 363 }
 364
 365 static void ProbeAllDeviceList()
 366 {
 367     ALint i;
 368
 369     free(alcAllDeviceList); alcAllDeviceList = NULL;
 370     alcAllDeviceListSize = 0;
 371
 372     for(i = 0;BackendList[i].Probe;i++)
 373         BackendList[i].Probe(ALL_DEVICE_PROBE);
 374 }
 375
 376 static void ProbeCaptureDeviceList()
 377 {
 378     ALint i;
 379
 380     free(alcCaptureDeviceList); alcCaptureDeviceList = NULL;
 381     alcCaptureDeviceListSize = 0;
 382
 383     for(i = 0;BackendList[i].Probe;i++)
 384         BackendList[i].Probe(CAPTURE_DEVICE_PROBE);
 385 }
 386
 387
 388 #define DECL_APPEND_LIST_FUNC(type)                                          \
 389 void Append##type##List(const ALCchar *name)                                 \
 390 {                                                                            \
 391     ALCuint len = strlen(name);                                              \
 392     void *temp;                                                              \
 393                                                                              \
 394     if(len == 0)                                                             \
 395         return;                                                              \
 396                                                                              \
 397     temp = realloc(alc##type##List, alc##type##ListSize + len + 2);          \
 398     if(!temp)                                                                \
 399     {                                                                        \
 400         AL_PRINT("Realloc failed to add %s!\n", name);                       \
 401         return;                                                              \
 402     }                                                                        \
 403     alc##type##List = temp;                                                  \
 404     sprintf(alc##type##List+alc##type##ListSize, "%s", name);                \
 405     alc##type##ListSize += len+1;                                            \
 406     alc##type##List[alc##type##ListSize] = 0;                                \
 407 }
 408
 409 DECL_APPEND_LIST_FUNC(Device)
 410 DECL_APPEND_LIST_FUNC(AllDevice)
 411 DECL_APPEND_LIST_FUNC(CaptureDevice)
 412
 413
 414 /*
 415     IsDevice
 416
 417     Check pDevice is a valid Device pointer
 418 */
 419 static ALCboolean IsDevice(ALCdevice *pDevice)
 420 {
 421     ALCdevice *pTempDevice;
 422
 423     SuspendContext(NULL);
 424
 425     pTempDevice = g_pDeviceList;
 426     while(pTempDevice && pTempDevice != pDevice)
 427         pTempDevice = pTempDevice->next;
 428
 429     ProcessContext(NULL);
 430
 431     return (pTempDevice ? ALC_TRUE : ALC_FALSE);
 432 }
 433
 434 /*
 435     IsContext
 436
 437     Check pContext is a valid Context pointer
 438 */
 439 static ALCboolean IsContext(ALCcontext *pContext)
 440 {
 441     ALCcontext *pTempContext;
 442
 443     SuspendContext(NULL);
 444
 445     pTempContext = g_pContextList;
 446     while (pTempContext && pTempContext != pContext)
 447         pTempContext = pTempContext->next;
 448
 449     ProcessContext(NULL);
 450
 451     return (pTempContext ? ALC_TRUE : ALC_FALSE);
 452 }
 453
 454
 455 /*
 456     SetALCError
 457
 458     Store latest ALC Error
 459 */
 460 ALCvoid SetALCError(ALenum errorCode)
 461 {
 462     g_eLastContextError = errorCode;
 463 }
 464
 465
 466 /*
 467     SuspendContext
 468
 469     Thread-safe entry
 470 */
 471 ALCvoid SuspendContext(ALCcontext *pContext)
 472 {
 473     (void)pContext;
 474     EnterCriticalSection(&g_csMutex);
 475 }
 476
 477
 478 /*
 479     ProcessContext
 480
 481     Thread-safe exit
 482 */
 483 ALCvoid ProcessContext(ALCcontext *pContext)
 484 {
 485     (void)pContext;
 486     LeaveCriticalSection(&g_csMutex);
 487 }
 488
 489
 490 /*
 491     GetContextSuspended
 492
 493     Returns the currently active Context, in a locked state
 494 */
 495 ALCcontext *GetContextSuspended(void)
 496 {
 497     ALCcontext *pContext = NULL;
 498
 499     SuspendContext(NULL);
 500
 501     pContext = tls_get(LocalContext);
 502     if(pContext && !IsContext(pContext))
 503     {
 504         tls_set(LocalContext, NULL);
 505         pContext = NULL;
 506     }
 507     if(!pContext)
 508     {
 509         pContext = g_pContextList;
 510         while(pContext && !pContext->InUse)
 511             pContext = pContext->next;
 512     }
 513     if(pContext)
 514         SuspendContext(pContext);
 515
 516     ProcessContext(NULL);
 517
 518     return pContext;
 519 }
 520
 521
 522 /*
 523     InitContext
 524
 525     Initialize Context variables
 526 */
 527 static ALvoid InitContext(ALCcontext *pContext)
 528 {
 529     //Initialise listener
 530     pContext->Listener.Gain = 1.0f;
 531     pContext->Listener.MetersPerUnit = 1.0f;
 532     pContext->Listener.Position[0] = 0.0f;
 533     pContext->Listener.Position[1] = 0.0f;
 534     pContext->Listener.Position[2] = 0.0f;
 535     pContext->Listener.Velocity[0] = 0.0f;
 536     pContext->Listener.Velocity[1] = 0.0f;
 537     pContext->Listener.Velocity[2] = 0.0f;
 538     pContext->Listener.Forward[0] = 0.0f;
 539     pContext->Listener.Forward[1] = 0.0f;
 540     pContext->Listener.Forward[2] = -1.0f;
 541     pContext->Listener.Up[0] = 0.0f;
 542     pContext->Listener.Up[1] = 1.0f;
 543     pContext->Listener.Up[2] = 0.0f;
 544
 545     //Validate pContext
 546     pContext->LastError = AL_NO_ERROR;
 547     pContext->InUse = AL_FALSE;
 548
 549     //Set output format
 550     pContext->Frequency = pContext->Device->Frequency;
 551
 552     //Set globals
 553     pContext->DistanceModel = AL_INVERSE_DISTANCE_CLAMPED;
 554     pContext->DopplerFactor = 1.0f;
 555     pContext->DopplerVelocity = 1.0f;
 556     pContext->flSpeedOfSound = SPEEDOFSOUNDMETRESPERSEC;
 557
 558     pContext->ExtensionList = "AL_EXTX_buffer_sub_data AL_EXT_EXPONENT_DISTANCE AL_EXT_FLOAT32 AL_EXT_IMA4 AL_EXT_LINEAR_DISTANCE AL_EXT_MCFORMATS AL_EXT_OFFSET AL_EXTX_sample_buffer_object AL_EXTX_source_distance_model AL_LOKI_quadriphonic";
 559
 560     aluInitPanning(pContext);
 561 }
 562
 563
 564 /*
 565     ExitContext
 566
 567     Clean up Context, destroy any remaining Sources
 568 */
 569 static ALCvoid ExitContext(ALCcontext *pContext)
 570 {
 571     //Invalidate context
 572     pContext->LastError = AL_NO_ERROR;
 573     pContext->InUse = AL_FALSE;
 574 }
 575
 576 ///////////////////////////////////////////////////////
 577
 578
 579 ///////////////////////////////////////////////////////
 580 // ALC Functions calls
 581
 582
 583 // This should probably move to another c file but for now ...
 584 ALCAPI ALCdevice* ALCAPIENTRY alcCaptureOpenDevice(const ALCchar *deviceName, ALCuint frequency, ALCenum format, ALCsizei SampleSize)
 585 {
 586     ALCboolean DeviceFound = ALC_FALSE;
 587     ALCdevice *pDevice = NULL;
 588     ALCint i;
 589
 590     if(SampleSize <= 0)
 591     {
 592         SetALCError(ALC_INVALID_VALUE);
 593         return NULL;
 594     }
 595
 596     if(deviceName && !deviceName[0])
 597         deviceName = NULL;
 598
 599     pDevice = malloc(sizeof(ALCdevice));
 600     if (pDevice)
 601     {
 602         //Initialise device structure
 603         memset(pDevice, 0, sizeof(ALCdevice));
 604
 605         //Validate device
 606         pDevice->Connected = ALC_TRUE;
 607         pDevice->IsCaptureDevice = AL_TRUE;
 608
 609         pDevice->szDeviceName = NULL;
 610
 611         pDevice->Frequency = frequency;
 612         pDevice->Format = format;
 613         pDevice->UpdateSize = SampleSize;
 614         pDevice->NumUpdates = 1;
 615
 616         SuspendContext(NULL);
 617         for(i = 0;BackendList[i].Init;i++)
 618         {
 619             pDevice->Funcs = &BackendList[i].Funcs;
 620             if(ALCdevice_OpenCapture(pDevice, deviceName))
 621             {
 622                 pDevice->next = g_pDeviceList;
 623                 g_pDeviceList = pDevice;
 624                 g_ulDeviceCount++;
 625
 626                 DeviceFound = ALC_TRUE;
 627                 break;
 628             }
 629         }
 630         ProcessContext(NULL);
 631
 632         if(!DeviceFound)
 633         {
 634             SetALCError(ALC_INVALID_VALUE);
 635             free(pDevice);
 636             pDevice = NULL;
 637         }
 638     }
 639     else
 640         SetALCError(ALC_OUT_OF_MEMORY);
 641
 642     return pDevice;
 643 }
 644
 645 ALCAPI ALCboolean ALCAPIENTRY alcCaptureCloseDevice(ALCdevice *pDevice)
 646 {
 647     ALCboolean bReturn = ALC_FALSE;
 648     ALCdevice **list;
 649
 650     if(IsDevice(pDevice) && pDevice->IsCaptureDevice)
 651     {
 652         SuspendContext(NULL);
 653
 654         list = &g_pDeviceList;
 655         while(*list != pDevice)
 656             list = &(*list)->next;
 657
 658         *list = (*list)->next;
 659         g_ulDeviceCount--;
 660
 661         ProcessContext(NULL);
 662
 663         free(pDevice->szDeviceName);
 664
 665         ALCdevice_CloseCapture(pDevice);
 666         free(pDevice);
 667
 668         bReturn = ALC_TRUE;
 669     }
 670     else
 671         SetALCError(ALC_INVALID_DEVICE);
 672
 673     return bReturn;
 674 }
 675
 676 ALCAPI void ALCAPIENTRY alcCaptureStart(ALCdevice *pDevice)
 677 {
 678     if(IsDevice(pDevice) && pDevice->IsCaptureDevice)
 679         ALCdevice_StartCapture(pDevice);
 680     else
 681         SetALCError(ALC_INVALID_DEVICE);
 682 }
 683
 684 ALCAPI void ALCAPIENTRY alcCaptureStop(ALCdevice *pDevice)
 685 {
 686     if(IsDevice(pDevice) && pDevice->IsCaptureDevice)
 687         ALCdevice_StopCapture(pDevice);
 688     else
 689         SetALCError(ALC_INVALID_DEVICE);
 690 }
 691
 692 ALCAPI void ALCAPIENTRY alcCaptureSamples(ALCdevice *pDevice, ALCvoid *pBuffer, ALCsizei lSamples)
 693 {
 694     if(IsDevice(pDevice) && pDevice->IsCaptureDevice)
 695         ALCdevice_CaptureSamples(pDevice, pBuffer, lSamples);
 696     else
 697         SetALCError(ALC_INVALID_DEVICE);
 698 }
 699
 700 /*
 701     alcGetError
 702
 703     Return last ALC generated error code
 704 */
 705 ALCAPI ALCenum ALCAPIENTRY alcGetError(ALCdevice *device)
 706 {
 707     ALCenum errorCode;
 708
 709     (void)device;
 710
 711     errorCode = g_eLastContextError;
 712     g_eLastContextError = ALC_NO_ERROR;
 713     return errorCode;
 714 }
 715
 716
 717 /*
 718     alcSuspendContext
 719
 720     Not functional
 721 */
 722 ALCAPI ALCvoid ALCAPIENTRY alcSuspendContext(ALCcontext *pContext)
 723 {
 724     // Not a lot happens here !
 725     (void)pContext;
 726 }
 727
 728
 729 /*
 730     alcProcessContext
 731
 732     Not functional
 733 */
 734 ALCAPI ALCvoid ALCAPIENTRY alcProcessContext(ALCcontext *pContext)
 735 {
 736     // Not a lot happens here !
 737     (void)pContext;
 738 }
 739
 740
 741 /*
 742     alcGetString
 743
 744     Returns information about the Device, and error strings
 745 */
 746 ALCAPI const ALCchar* ALCAPIENTRY alcGetString(ALCdevice *pDevice,ALCenum param)
 747 {
 748     const ALCchar *value = NULL;
 749
 750     switch (param)
 751     {
 752     case ALC_NO_ERROR:
 753         value = alcNoError;
 754         break;
 755
 756     case ALC_INVALID_ENUM:
 757         value = alcErrInvalidEnum;
 758         break;
 759
 760     case ALC_INVALID_VALUE:
 761         value = alcErrInvalidValue;
 762         break;
 763
 764     case ALC_INVALID_DEVICE:
 765         value = alcErrInvalidDevice;
 766         break;
 767
 768     case ALC_INVALID_CONTEXT:
 769         value = alcErrInvalidContext;
 770         break;
 771
 772     case ALC_OUT_OF_MEMORY:
 773         value = alcErrOutOfMemory;
 774         break;
 775
 776     case ALC_DEVICE_SPECIFIER:
 777         if(IsDevice(pDevice))
 778             value = pDevice->szDeviceName;
 779         else
 780         {
 781             ProbeDeviceList();
 782             value = alcDeviceList;
 783         }
 784         break;
 785
 786     case ALC_ALL_DEVICES_SPECIFIER:
 787         ProbeAllDeviceList();
 788         value = alcAllDeviceList;
 789         break;
 790
 791     case ALC_CAPTURE_DEVICE_SPECIFIER:
 792         if(IsDevice(pDevice))
 793             value = pDevice->szDeviceName;
 794         else
 795         {
 796             ProbeCaptureDeviceList();
 797             value = alcCaptureDeviceList;
 798         }
 799         break;
 800
 801     /* Default devices are always first in the list */
 802     case ALC_DEFAULT_DEVICE_SPECIFIER:
 803         free(alcDefaultDeviceSpecifier);
 804         alcDefaultDeviceSpecifier = strdup(alcDeviceList ? alcDeviceList : "");
 805         if(!alcDefaultDeviceSpecifier)
 806             SetALCError(ALC_OUT_OF_MEMORY);
 807         value = alcDefaultDeviceSpecifier;
 808         break;
 809
 810     case ALC_DEFAULT_ALL_DEVICES_SPECIFIER:
 811         free(alcDefaultAllDeviceSpecifier);
 812         alcDefaultAllDeviceSpecifier = strdup(alcAllDeviceList ?
 813                                               alcAllDeviceList : "");
 814         if(!alcDefaultAllDeviceSpecifier)
 815             SetALCError(ALC_OUT_OF_MEMORY);
 816         value = alcDefaultAllDeviceSpecifier;
 817         break;
 818
 819     case ALC_CAPTURE_DEFAULT_DEVICE_SPECIFIER:
 820         free(alcCaptureDefaultDeviceSpecifier);
 821         alcCaptureDefaultDeviceSpecifier = strdup(alcCaptureDeviceList ?
 822                                                   alcCaptureDeviceList : "");
 823         if(!alcCaptureDefaultDeviceSpecifier)
 824             SetALCError(ALC_OUT_OF_MEMORY);
 825         value = alcCaptureDefaultDeviceSpecifier;
 826         break;
 827
 828     case ALC_EXTENSIONS:
 829         value = alcExtensionList;
 830         break;
 831
 832     default:
 833         SetALCError(ALC_INVALID_ENUM);
 834         break;
 835     }
 836
 837     return value;
 838 }
 839
 840
 841 /*
 842     alcGetIntegerv
 843
 844     Returns information about the Device and the version of Open AL
 845 */
 846 ALCAPI ALCvoid ALCAPIENTRY alcGetIntegerv(ALCdevice *device,ALCenum param,ALsizei size,ALCint *data)
 847 {
 848     if(IsDevice(device) && device->IsCaptureDevice)
 849     {
 850         SuspendContext(NULL);
 851
 852         // Capture device
 853         switch (param)
 854         {
 855         case ALC_CAPTURE_SAMPLES:
 856             if ((size) && (data))
 857                 *data = ALCdevice_AvailableSamples(device);
 858             else
 859                 SetALCError(ALC_INVALID_VALUE);
 860             break;
 861
 862         case ALC_CONNECTED:
 863             if(size <= 0)
 864                 SetALCError(ALC_INVALID_VALUE);
 865             else
 866                 *data = device->Connected;
 867             break;
 868
 869         default:
 870             SetALCError(ALC_INVALID_ENUM);
 871             break;
 872         }
 873
 874         ProcessContext(NULL);
 875     }
 876     else
 877     {
 878         if(data)
 879         {
 880             // Playback Device
 881             switch (param)
 882             {
 883                 case ALC_MAJOR_VERSION:
 884                     if(size <= 0)
 885                         SetALCError(ALC_INVALID_VALUE);
 886                     else
 887                         *data = alcMajorVersion;
 888                     break;
 889
 890                 case ALC_MINOR_VERSION:
 891                     if(size <= 0)
 892                         SetALCError(ALC_INVALID_VALUE);
 893                     else
 894                         *data = alcMinorVersion;
 895                     break;
 896
 897                 case ALC_EFX_MAJOR_VERSION:
 898                     if(size <= 0)
 899                         SetALCError(ALC_INVALID_VALUE);
 900                     else
 901                         *data = alcEFXMajorVersion;
 902                     break;
 903
 904                 case ALC_EFX_MINOR_VERSION:
 905                     if(size <= 0)
 906                         SetALCError(ALC_INVALID_VALUE);
 907                     else
 908                         *data = alcEFXMinorVersion;
 909                     break;
 910
 911                 case ALC_MAX_AUXILIARY_SENDS:
 912                     if(size <= 0)
 913                         SetALCError(ALC_INVALID_VALUE);
 914                     else
 915                         *data = (device?device->NumAuxSends:MAX_SENDS);
 916                     break;
 917
 918                 case ALC_ATTRIBUTES_SIZE:
 919                     if(!IsDevice(device))
 920                         SetALCError(ALC_INVALID_DEVICE);
 921                     else if(size <= 0)
 922                         SetALCError(ALC_INVALID_VALUE);
 923                     else
 924                         *data = 13;
 925                     break;
 926
 927                 case ALC_ALL_ATTRIBUTES:
 928                     if(!IsDevice(device))
 929                         SetALCError(ALC_INVALID_DEVICE);
 930                     else if (size < 13)
 931                         SetALCError(ALC_INVALID_VALUE);
 932                     else
 933                     {
 934                         int i = 0;
 935
 936                         SuspendContext(NULL);
 937                         data[i++] = ALC_FREQUENCY;
 938                         data[i++] = device->Frequency;
 939
 940                         data[i++] = ALC_REFRESH;
 941                         data[i++] = device->Frequency / device->UpdateSize;
 942
 943                         data[i++] = ALC_SYNC;
 944                         data[i++] = ALC_FALSE;
 945
 946                         data[i++] = ALC_MONO_SOURCES;
 947                         data[i++] = device->lNumMonoSources;
 948
 949                         data[i++] = ALC_STEREO_SOURCES;
 950                         data[i++] = device->lNumStereoSources;
 951
 952                         data[i++] = ALC_MAX_AUXILIARY_SENDS;
 953                         data[i++] = device->NumAuxSends;
 954
 955                         data[i++] = 0;
 956                         ProcessContext(NULL);
 957                     }
 958                     break;
 959
 960                 case ALC_FREQUENCY:
 961                     if(!IsDevice(device))
 962                         SetALCError(ALC_INVALID_DEVICE);
 963                     else if(size <= 0)
 964                         SetALCError(ALC_INVALID_VALUE);
 965                     else
 966                         *data = device->Frequency;
 967                     break;
 968
 969                 case ALC_REFRESH:
 970                     if(!IsDevice(device))
 971                         SetALCError(ALC_INVALID_DEVICE);
 972                     else if(size <= 0)
 973                         SetALCError(ALC_INVALID_VALUE);
 974                     else
 975                         *data = device->Frequency / device->UpdateSize;
 976                     break;
 977
 978                 case ALC_SYNC:
 979                     if(!IsDevice(device))
 980                         SetALCError(ALC_INVALID_DEVICE);
 981                     else if(size <= 0)
 982                         SetALCError(ALC_INVALID_VALUE);
 983                     else
 984                         *data = ALC_FALSE;
 985                     break;
 986
 987                 case ALC_MONO_SOURCES:
 988                     if(!IsDevice(device))
 989                         SetALCError(ALC_INVALID_DEVICE);
 990                     else if(size <= 0)
 991                         SetALCError(ALC_INVALID_VALUE);
 992                     else
 993                         *data = device->lNumMonoSources;
 994                     break;
 995
 996                 case ALC_STEREO_SOURCES:
 997                     if(!IsDevice(device))
 998                         SetALCError(ALC_INVALID_DEVICE);
 999                     else if(size <= 0)
1000                         SetALCError(ALC_INVALID_VALUE);
1001                     else
1002                         *data = device->lNumStereoSources;
1003                     break;
1004
1005                 case ALC_CONNECTED:
1006                     if(!IsDevice(device))
1007                         SetALCError(ALC_INVALID_DEVICE);
1008                     else if(size <= 0)
1009                         SetALCError(ALC_INVALID_VALUE);
1010                     else
1011                         *data = device->Connected;
1012                     break;
1013
1014                 default:
1015                     SetALCError(ALC_INVALID_ENUM);
1016                     break;
1017             }
1018         }
1019         else if(size)
1020             SetALCError(ALC_INVALID_VALUE);
1021     }
1022
1023     return;
1024 }
1025
1026
1027 /*
1028     alcIsExtensionPresent
1029
1030     Determines if there is support for a particular extension
1031 */
1032 ALCAPI ALCboolean ALCAPIENTRY alcIsExtensionPresent(ALCdevice *device, const ALCchar *extName)
1033 {
1034     ALCboolean bResult = ALC_FALSE;
1035
1036     (void)device;
1037
1038     if (extName)
1039     {
1040         const char *ptr;
1041         size_t len;
1042
1043         len = strlen(extName);
1044         ptr = alcExtensionList;
1045         while(ptr && *ptr)
1046         {
1047             if(strncasecmp(ptr, extName, len) == 0 &&
1048                (ptr[len] == '\0' || isspace(ptr[len])))
1049             {
1050                 bResult = ALC_TRUE;
1051                 break;
1052             }
1053             if((ptr=strchr(ptr, ' ')) != NULL)
1054             {
1055                 do {
1056                     ++ptr;
1057                 } while(isspace(*ptr));
1058             }
1059         }
1060     }
1061     else
1062         SetALCError(ALC_INVALID_VALUE);
1063
1064     return bResult;
1065 }
1066
1067
1068 /*
1069     alcGetProcAddress
1070
1071     Retrieves the function address for a particular extension function
1072 */
1073 ALCAPI ALCvoid *  ALCAPIENTRY alcGetProcAddress(ALCdevice *device, const ALCchar *funcName)
1074 {
1075     ALCvoid *pFunction = NULL;
1076     ALsizei i = 0;
1077
1078     (void)device;
1079
1080     if (funcName)
1081     {
1082         while(alcFunctions[i].funcName &&
1083               strcmp(alcFunctions[i].funcName,funcName) != 0)
1084             i++;
1085         pFunction = alcFunctions[i].address;
1086     }
1087     else
1088         SetALCError(ALC_INVALID_VALUE);
1089
1090     return pFunction;
1091 }
1092
1093
1094 /*
1095     alcGetEnumValue
1096
1097     Get the value for a particular ALC Enumerated Value
1098 */
1099 ALCAPI ALCenum ALCAPIENTRY alcGetEnumValue(ALCdevice *device, const ALCchar *enumName)
1100 {
1101     ALsizei i = 0;
1102     ALCenum val;
1103
1104     (void)device;
1105
1106     while ((enumeration[i].enumName)&&(strcmp(enumeration[i].enumName,enumName)))
1107         i++;
1108     val = enumeration[i].value;
1109
1110     if(!enumeration[i].enumName)
1111         SetALCError(ALC_INVALID_VALUE);
1112
1113     return val;
1114 }
1115
1116
1117 /*
1118     alcCreateContext
1119
1120     Create and attach a Context to a particular Device.
1121 */
1122 ALCAPI ALCcontext* ALCAPIENTRY alcCreateContext(ALCdevice *device, const ALCint *attrList)
1123 {
1124     ALCcontext *ALContext = NULL;
1125     ALuint      ulAttributeIndex, ulRequestedStereoSources;
1126     ALuint      RequestedSends;
1127
1128     if(IsDevice(device) && !device->IsCaptureDevice && device->Connected)
1129     {
1130         // Reset Context Last Error code
1131         g_eLastContextError = ALC_NO_ERROR;
1132
1133         // Current implementation only allows one Context per Device
1134         if(!device->Context)
1135         {
1136             ALContext = calloc(1, sizeof(ALCcontext));
1137             if(!ALContext)
1138             {
1139                 SetALCError(ALC_OUT_OF_MEMORY);
1140                 return NULL;
1141             }
1142
1143             SuspendContext(NULL);
1144
1145             ALContext->Device = device;
1146             InitContext(ALContext);
1147
1148             device->Context = ALContext;
1149
1150             ALContext->next = g_pContextList;
1151             g_pContextList = ALContext;
1152             g_ulContextCount++;
1153
1154             // Check for attributes
1155             if (attrList)
1156             {
1157                 ALCint level = device->Bs2bLevel;
1158                 ALCuint freq = device->Frequency;
1159                 ALCint numMono = device->lNumMonoSources;
1160                 ALCint numStereo = device->lNumStereoSources;
1161                 ALCuint numSends = device->NumAuxSends;
1162
1163                 ulAttributeIndex = 0;
1164                 while ((ulAttributeIndex < 10) && (attrList[ulAttributeIndex]))
1165                 {
1166                     if(attrList[ulAttributeIndex] == ALC_FREQUENCY)
1167                     {
1168                         freq = attrList[ulAttributeIndex + 1];
1169                         if(freq == 0)
1170                             freq = device->Frequency;
1171                     }
1172
1173                     if(attrList[ulAttributeIndex] == ALC_STEREO_SOURCES)
1174                     {
1175                         ulRequestedStereoSources = attrList[ulAttributeIndex + 1];
1176
1177                         if (ulRequestedStereoSources > device->MaxNoOfSources)
1178                             ulRequestedStereoSources = device->MaxNoOfSources;
1179
1180                         numStereo = ulRequestedStereoSources;
1181                         numMono = device->MaxNoOfSources - numStereo;
1182                     }
1183
1184                     if(attrList[ulAttributeIndex] == ALC_MAX_AUXILIARY_SENDS)
1185                     {
1186                         RequestedSends = attrList[ulAttributeIndex + 1];
1187
1188                         if(RequestedSends > MAX_SENDS)
1189                             RequestedSends = MAX_SENDS;
1190
1191                         numSends = RequestedSends;
1192                     }
1193
1194                     ulAttributeIndex += 2;
1195                 }
1196
1197                 device->Bs2bLevel = GetConfigValueInt(NULL, "cf_level", level);
1198                 device->Frequency = GetConfigValueInt(NULL, "frequency", freq);
1199                 device->lNumMonoSources = numMono;
1200                 device->lNumStereoSources = numStereo;
1201                 device->NumAuxSends = GetConfigValueInt(NULL, "sends", numSends);
1202             }
1203
1204             if(ALCdevice_ResetPlayback(device) == ALC_FALSE)
1205             {
1206                 alcDestroyContext(ALContext);
1207                 ALContext = NULL;
1208                 SetALCError(ALC_INVALID_VALUE);
1209             }
1210
1211             ALContext->Frequency = device->Frequency;
1212
1213             if(device->Bs2bLevel > 0 && device->Bs2bLevel <= 6)
1214             {
1215                 if(!device->Bs2b)
1216                 {
1217                     device->Bs2b = calloc(1, sizeof(*device->Bs2b));
1218                     bs2b_clear(device->Bs2b);
1219                 }
1220                 bs2b_set_srate(device->Bs2b, device->Frequency);
1221                 bs2b_set_level(device->Bs2b, device->Bs2bLevel);
1222             }
1223             else
1224             {
1225                 free(device->Bs2b);
1226                 device->Bs2b = NULL;
1227             }
1228
1229             ProcessContext(NULL);
1230         }
1231         else
1232         {
1233             SetALCError(ALC_INVALID_VALUE);
1234             ALContext = NULL;
1235         }
1236     }
1237     else
1238         SetALCError(ALC_INVALID_DEVICE);
1239
1240     return ALContext;
1241 }
1242
1243
1244 /*
1245     alcDestroyContext
1246
1247     Remove a Context
1248 */
1249 ALCAPI ALCvoid ALCAPIENTRY alcDestroyContext(ALCcontext *context)
1250 {
1251     ALCcontext **list;
1252
1253     if (IsContext(context))
1254     {
1255         ALCdevice_StopPlayback(context->Device);
1256
1257         // Lock context
1258         SuspendContext(context);
1259
1260         if(context->SourceCount > 0)
1261         {
1262 #ifdef _DEBUG
1263             AL_PRINT("alcDestroyContext(): deleting %d Source(s)\n", context->SourceCount);
1264 #endif
1265             ReleaseALSources(context);
1266         }
1267         if(context->AuxiliaryEffectSlotCount > 0)
1268         {
1269 #ifdef _DEBUG
1270             AL_PRINT("alcDestroyContext(): deleting %d AuxiliaryEffectSlot(s)\n", context->AuxiliaryEffectSlotCount);
1271 #endif
1272             ReleaseALAuxiliaryEffectSlots(context);
1273         }
1274
1275         context->Device->Context = NULL;
1276
1277         list = &g_pContextList;
1278         while(*list != context)
1279             list = &(*list)->next;
1280
1281         *list = (*list)->next;
1282         g_ulContextCount--;
1283
1284         // Unlock context
1285         ProcessContext(context);
1286
1287         ExitContext(context);
1288
1289         // Free memory (MUST do this after ProcessContext)
1290         memset(context, 0, sizeof(ALCcontext));
1291         free(context);
1292     }
1293     else
1294         SetALCError(ALC_INVALID_CONTEXT);
1295 }
1296
1297
1298 /*
1299     alcGetCurrentContext
1300
1301     Returns the currently active Context
1302 */
1303 ALCAPI ALCcontext * ALCAPIENTRY alcGetCurrentContext(ALCvoid)
1304 {
1305     ALCcontext *pContext;
1306
1307     if((pContext=GetContextSuspended()) != NULL)
1308         ProcessContext(pContext);
1309
1310     return pContext;
1311 }
1312
1313 /*
1314     alcGetThreadContext
1315
1316     Returns the currently active thread-local Context
1317 */
1318 ALCcontext * ALCAPIENTRY alcGetThreadContext(void)
1319 {
1320     ALCcontext *pContext = NULL;
1321
1322     SuspendContext(NULL);
1323
1324     pContext = tls_get(LocalContext);
1325     if(pContext && !IsContext(pContext))
1326     {
1327         tls_set(LocalContext, NULL);
1328         pContext = NULL;
1329     }
1330
1331     ProcessContext(NULL);
1332
1333     return pContext;
1334 }
1335
1336
1337 /*
1338     alcGetContextsDevice
1339
1340     Returns the Device that a particular Context is attached to
1341 */
1342 ALCAPI ALCdevice* ALCAPIENTRY alcGetContextsDevice(ALCcontext *pContext)
1343 {
1344     ALCdevice *pDevice = NULL;
1345
1346     SuspendContext(NULL);
1347     if (IsContext(pContext))
1348         pDevice = pContext->Device;
1349     else
1350         SetALCError(ALC_INVALID_CONTEXT);
1351     ProcessContext(NULL);
1352
1353     return pDevice;
1354 }
1355
1356
1357 /*
1358     alcMakeContextCurrent
1359
1360     Makes the given Context the active Context
1361 */
1362 ALCAPI ALCboolean ALCAPIENTRY alcMakeContextCurrent(ALCcontext *context)
1363 {
1364     ALCcontext *ALContext;
1365     ALboolean bReturn = AL_TRUE;
1366
1367     SuspendContext(NULL);
1368
1369     // context must be a valid Context or NULL
1370     if(context == NULL || IsContext(context))
1371     {
1372         if((ALContext=GetContextSuspended()) != NULL)
1373         {
1374             ALContext->InUse=AL_FALSE;
1375             ProcessContext(ALContext);
1376         }
1377
1378         if((ALContext=context) != NULL && ALContext->Device)
1379         {
1380             SuspendContext(ALContext);
1381             ALContext->InUse=AL_TRUE;
1382             ProcessContext(ALContext);
1383         }
1384
1385         tls_set(LocalContext, NULL);
1386     }
1387     else
1388     {
1389         SetALCError(ALC_INVALID_CONTEXT);
1390         bReturn = AL_FALSE;
1391     }
1392
1393     ProcessContext(NULL);
1394
1395     return bReturn;
1396 }
1397
1398 /*
1399     alcMakeCurrent
1400
1401     Makes the given Context the active Context for the current thread
1402 */
1403 ALCboolean ALCAPIENTRY alcMakeCurrent(ALCcontext *context)
1404 {
1405     ALboolean bReturn = AL_TRUE;
1406
1407     SuspendContext(NULL);
1408
1409     // context must be a valid Context or NULL
1410     if(context == NULL || IsContext(context))
1411         tls_set(LocalContext, context);
1412     else
1413     {
1414         SetALCError(ALC_INVALID_CONTEXT);
1415         bReturn = AL_FALSE;
1416     }
1417
1418     ProcessContext(NULL);
1419
1420     return bReturn;
1421 }
1422
1423
1424 static ALenum GetFormatFromString(const char *str)
1425 {
1426     if(strcasecmp(str, "AL_FORMAT_MONO32") == 0)    return AL_FORMAT_MONO_FLOAT32;
1427     if(strcasecmp(str, "AL_FORMAT_STEREO32") == 0)  return AL_FORMAT_STEREO_FLOAT32;
1428     if(strcasecmp(str, "AL_FORMAT_QUAD32") == 0)    return AL_FORMAT_QUAD32;
1429     if(strcasecmp(str, "AL_FORMAT_51CHN32") == 0)   return AL_FORMAT_51CHN32;
1430     if(strcasecmp(str, "AL_FORMAT_61CHN32") == 0)   return AL_FORMAT_61CHN32;
1431     if(strcasecmp(str, "AL_FORMAT_71CHN32") == 0)   return AL_FORMAT_71CHN32;
1432
1433     if(strcasecmp(str, "AL_FORMAT_MONO16") == 0)    return AL_FORMAT_MONO16;
1434     if(strcasecmp(str, "AL_FORMAT_STEREO16") == 0)  return AL_FORMAT_STEREO16;
1435     if(strcasecmp(str, "AL_FORMAT_QUAD16") == 0)    return AL_FORMAT_QUAD16;
1436     if(strcasecmp(str, "AL_FORMAT_51CHN16") == 0)   return AL_FORMAT_51CHN16;
1437     if(strcasecmp(str, "AL_FORMAT_61CHN16") == 0)   return AL_FORMAT_61CHN16;
1438     if(strcasecmp(str, "AL_FORMAT_71CHN16") == 0)   return AL_FORMAT_71CHN16;
1439
1440     if(strcasecmp(str, "AL_FORMAT_MONO8") == 0)    return AL_FORMAT_MONO8;
1441     if(strcasecmp(str, "AL_FORMAT_STEREO8") == 0)  return AL_FORMAT_STEREO8;
1442     if(strcasecmp(str, "AL_FORMAT_QUAD8") == 0)    return AL_FORMAT_QUAD8;
1443     if(strcasecmp(str, "AL_FORMAT_51CHN8") == 0)   return AL_FORMAT_51CHN8;
1444     if(strcasecmp(str, "AL_FORMAT_61CHN8") == 0)   return AL_FORMAT_61CHN8;
1445     if(strcasecmp(str, "AL_FORMAT_71CHN8") == 0)   return AL_FORMAT_71CHN8;
1446
1447     AL_PRINT("Unknown format: \"%s\"\n", str);
1448     return AL_FORMAT_STEREO16;
1449 }
1450
1451 /*
1452     alcOpenDevice
1453
1454     Open the Device specified.
1455 */
1456 ALCAPI ALCdevice* ALCAPIENTRY alcOpenDevice(const ALCchar *deviceName)
1457 {
1458     ALboolean bDeviceFound = AL_FALSE;
1459     ALCdevice *device;
1460     ALint i;
1461
1462     if(deviceName && !deviceName[0])
1463         deviceName = NULL;
1464
1465     device = malloc(sizeof(ALCdevice));
1466     if (device)
1467     {
1468         const char *fmt;
1469
1470         //Initialise device structure
1471         memset(device, 0, sizeof(ALCdevice));
1472
1473         //Validate device
1474         device->Connected = ALC_TRUE;
1475         device->IsCaptureDevice = AL_FALSE;
1476
1477         device->Bs2b = NULL;
1478         device->szDeviceName = NULL;
1479
1480         //Set output format
1481         device->Frequency = GetConfigValueInt(NULL, "frequency", SWMIXER_OUTPUT_RATE);
1482         if(device->Frequency == 0)
1483             device->Frequency = SWMIXER_OUTPUT_RATE;
1484
1485         fmt = GetConfigValue(NULL, "format", "AL_FORMAT_STEREO16");
1486         device->Format = GetFormatFromString(fmt);
1487
1488         device->NumUpdates = GetConfigValueInt(NULL, "periods", 4);
1489         if(device->NumUpdates < 2)
1490             device->NumUpdates = 4;
1491
1492         i = GetConfigValueInt(NULL, "refresh", 4096);
1493         if(i <= 0) i = 4096;
1494
1495         device->UpdateSize = GetConfigValueInt(NULL, "period_size", i/device->NumUpdates);
1496         if(device->UpdateSize <= 0)
1497             device->UpdateSize = i/device->NumUpdates;
1498
1499         device->MaxNoOfSources = GetConfigValueInt(NULL, "sources", 256);
1500         if((ALint)device->MaxNoOfSources <= 0)
1501             device->MaxNoOfSources = 256;
1502
1503         device->AuxiliaryEffectSlotMax = GetConfigValueInt(NULL, "slots", 4);
1504         if((ALint)device->AuxiliaryEffectSlotMax <= 0)
1505             device->AuxiliaryEffectSlotMax = 4;
1506
1507         device->lNumStereoSources = 1;
1508         device->lNumMonoSources = device->MaxNoOfSources - device->lNumStereoSources;
1509
1510         device->NumAuxSends = GetConfigValueInt(NULL, "sends", MAX_SENDS);
1511         if(device->NumAuxSends > MAX_SENDS)
1512             device->NumAuxSends = MAX_SENDS;
1513
1514         device->Bs2bLevel = GetConfigValueInt(NULL, "cf_level", 0);
1515
1516         // Find a playback device to open
1517         SuspendContext(NULL);
1518         for(i = 0;BackendList[i].Init;i++)
1519         {
1520             device->Funcs = &BackendList[i].Funcs;
1521             if(ALCdevice_OpenPlayback(device, deviceName))
1522             {
1523                 device->next = g_pDeviceList;
1524                 g_pDeviceList = device;
1525                 g_ulDeviceCount++;
1526
1527                 bDeviceFound = AL_TRUE;
1528                 break;
1529             }
1530         }
1531         ProcessContext(NULL);
1532
1533         if (!bDeviceFound)
1534         {
1535             // No suitable output device found
1536             SetALCError(ALC_INVALID_VALUE);
1537             free(device);
1538             device = NULL;
1539         }
1540     }
1541     else
1542         SetALCError(ALC_OUT_OF_MEMORY);
1543
1544     return device;
1545 }
1546
1547
1548 /*
1549     alcCloseDevice
1550
1551     Close the specified Device
1552 */
1553 ALCAPI ALCboolean ALCAPIENTRY alcCloseDevice(ALCdevice *pDevice)
1554 {
1555     ALCboolean bReturn = ALC_FALSE;
1556     ALCdevice **list;
1557
1558     if(IsDevice(pDevice) && !pDevice->IsCaptureDevice)
1559     {
1560         SuspendContext(NULL);
1561
1562         list = &g_pDeviceList;
1563         while(*list != pDevice)
1564             list = &(*list)->next;
1565
1566         *list = (*list)->next;
1567         g_ulDeviceCount--;
1568
1569         ProcessContext(NULL);
1570
1571         if(pDevice->Context)
1572         {
1573 #ifdef _DEBUG
1574             AL_PRINT("alcCloseDevice(): destroying 1 Context\n");
1575 #endif
1576             alcDestroyContext(pDevice->Context);
1577         }
1578         ALCdevice_ClosePlayback(pDevice);
1579
1580         if(pDevice->BufferCount > 0)
1581         {
1582 #ifdef _DEBUG
1583             AL_PRINT("alcCloseDevice(): deleting %d Buffer(s)\n", pDevice->BufferCount);
1584 #endif
1585             ReleaseALBuffers(pDevice);
1586         }
1587         if(pDevice->EffectCount > 0)
1588         {
1589 #ifdef _DEBUG
1590             AL_PRINT("alcCloseDevice(): deleting %d Effect(s)\n", pDevice->EffectCount);
1591 #endif
1592             ReleaseALEffects(pDevice);
1593         }
1594         if(pDevice->FilterCount > 0)
1595         {
1596 #ifdef _DEBUG
1597             AL_PRINT("alcCloseDevice(): deleting %d Filter(s)\n", pDevice->FilterCount);
1598 #endif
1599             ReleaseALFilters(pDevice);
1600         }
1601         if(pDevice->DatabufferCount > 0)
1602         {
1603 #ifdef _DEBUG
1604             AL_PRINT("alcCloseDevice(): deleting %d Databuffer(s)\n", pDevice->DatabufferCount);
1605 #endif
1606             ReleaseALDatabuffers(pDevice);
1607         }
1608
1609         free(pDevice->Bs2b);
1610         pDevice->Bs2b = NULL;
1611
1612         free(pDevice->szDeviceName);
1613
1614         //Release device structure
1615         memset(pDevice, 0, sizeof(ALCdevice));
1616         free(pDevice);
1617
1618         bReturn = ALC_TRUE;
1619     }
1620     else
1621         SetALCError(ALC_INVALID_DEVICE);
1622
1623     return bReturn;
1624 }
1625
1626
1627 ALCvoid ReleaseALC(ALCvoid)
1628 {
1629     free(alcDeviceList); alcDeviceList = NULL;
1630     alcDeviceListSize = 0;
1631     free(alcAllDeviceList); alcAllDeviceList = NULL;
1632     alcAllDeviceListSize = 0;
1633     free(alcCaptureDeviceList); alcCaptureDeviceList = NULL;
1634     alcCaptureDeviceListSize = 0;
1635
1636     free(alcDefaultDeviceSpecifier);
1637     alcDefaultDeviceSpecifier = NULL;
1638     free(alcDefaultAllDeviceSpecifier);
1639     alcDefaultAllDeviceSpecifier = NULL;
1640     free(alcCaptureDefaultDeviceSpecifier);
1641     alcCaptureDefaultDeviceSpecifier = NULL;
1642
1643 #ifdef _DEBUG
1644     if(g_ulDeviceCount > 0)
1645         AL_PRINT("exit(): closing %u Device%s\n", g_ulDeviceCount, (g_ulDeviceCount>1)?"s":"");
1646 #endif
1647
1648     while(g_pDeviceList)
1649     {
1650         if(g_pDeviceList->IsCaptureDevice)
1651             alcCaptureCloseDevice(g_pDeviceList);
1652         else
1653             alcCloseDevice(g_pDeviceList);
1654     }
1655 }
1656
1657 ///////////////////////////////////////////////////////