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.
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.
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
21 #define _CRT_SECURE_NO_DEPRECATE // get rid of sprintf security warnings on VS2005
37 #include "alExtension.h"
38 #include "alAuxEffectSlot.h"
41 ///////////////////////////////////////////////////////
46 ///////////////////////////////////////////////////////
49 #define EmptyFuncs { NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL }
52 void (*Init
)(BackendFuncs
*);
56 { "alsa", alc_alsa_init
, EmptyFuncs
},
59 { "oss", alc_oss_init
, EmptyFuncs
},
62 { "solaris", alc_solaris_init
, EmptyFuncs
},
65 { "dsound", alcDSoundInit
, EmptyFuncs
},
68 { "winmm", alcWinMMInit
, EmptyFuncs
},
71 { "wave", alc_wave_init
, EmptyFuncs
},
73 { NULL
, NULL
, EmptyFuncs
}
77 ///////////////////////////////////////////////////////
79 #define ALC_EFX_MAJOR_VERSION 0x20001
80 #define ALC_EFX_MINOR_VERSION 0x20002
81 #define ALC_MAX_AUXILIARY_SENDS 0x20003
83 ///////////////////////////////////////////////////////
84 // STRING and EXTENSIONS
86 typedef struct ALCfunction_struct
92 static ALCfunction alcFunctions
[] = {
93 { "alcCreateContext", (ALvoid
*) alcCreateContext
},
94 { "alcMakeContextCurrent", (ALvoid
*) alcMakeContextCurrent
},
95 { "alcProcessContext", (ALvoid
*) alcProcessContext
},
96 { "alcSuspendContext", (ALvoid
*) alcSuspendContext
},
97 { "alcDestroyContext", (ALvoid
*) alcDestroyContext
},
98 { "alcGetCurrentContext", (ALvoid
*) alcGetCurrentContext
},
99 { "alcGetContextsDevice", (ALvoid
*) alcGetContextsDevice
},
100 { "alcOpenDevice", (ALvoid
*) alcOpenDevice
},
101 { "alcCloseDevice", (ALvoid
*) alcCloseDevice
},
102 { "alcGetError", (ALvoid
*) alcGetError
},
103 { "alcIsExtensionPresent", (ALvoid
*) alcIsExtensionPresent
},
104 { "alcGetProcAddress", (ALvoid
*) alcGetProcAddress
},
105 { "alcGetEnumValue", (ALvoid
*) alcGetEnumValue
},
106 { "alcGetString", (ALvoid
*) alcGetString
},
107 { "alcGetIntegerv", (ALvoid
*) alcGetIntegerv
},
108 { "alcCaptureOpenDevice", (ALvoid
*) alcCaptureOpenDevice
},
109 { "alcCaptureCloseDevice", (ALvoid
*) alcCaptureCloseDevice
},
110 { "alcCaptureStart", (ALvoid
*) alcCaptureStart
},
111 { "alcCaptureStop", (ALvoid
*) alcCaptureStop
},
112 { "alcCaptureSamples", (ALvoid
*) alcCaptureSamples
},
113 { NULL
, (ALvoid
*) NULL
}
116 static ALenums enumeration
[]={
118 { (ALchar
*)"ALC_INVALID", ALC_INVALID
},
119 { (ALchar
*)"ALC_FALSE", ALC_FALSE
},
120 { (ALchar
*)"ALC_TRUE", ALC_TRUE
},
123 { (ALchar
*)"ALC_MAJOR_VERSION", ALC_MAJOR_VERSION
},
124 { (ALchar
*)"ALC_MINOR_VERSION", ALC_MINOR_VERSION
},
125 { (ALchar
*)"ALC_ATTRIBUTES_SIZE", ALC_ATTRIBUTES_SIZE
},
126 { (ALchar
*)"ALC_ALL_ATTRIBUTES", ALC_ALL_ATTRIBUTES
},
127 { (ALchar
*)"ALC_DEFAULT_DEVICE_SPECIFIER", ALC_DEFAULT_DEVICE_SPECIFIER
},
128 { (ALchar
*)"ALC_DEVICE_SPECIFIER", ALC_DEVICE_SPECIFIER
},
129 { (ALchar
*)"ALC_ALL_DEVICES_SPECIFIER", ALC_ALL_DEVICES_SPECIFIER
},
130 { (ALchar
*)"ALC_DEFAULT_ALL_DEVICES_SPECIFIER", ALC_DEFAULT_ALL_DEVICES_SPECIFIER
},
131 { (ALchar
*)"ALC_EXTENSIONS", ALC_EXTENSIONS
},
132 { (ALchar
*)"ALC_FREQUENCY", ALC_FREQUENCY
},
133 { (ALchar
*)"ALC_REFRESH", ALC_REFRESH
},
134 { (ALchar
*)"ALC_SYNC", ALC_SYNC
},
135 { (ALchar
*)"ALC_MONO_SOURCES", ALC_MONO_SOURCES
},
136 { (ALchar
*)"ALC_STEREO_SOURCES", ALC_STEREO_SOURCES
},
137 { (ALchar
*)"ALC_CAPTURE_DEVICE_SPECIFIER", ALC_CAPTURE_DEVICE_SPECIFIER
},
138 { (ALchar
*)"ALC_CAPTURE_DEFAULT_DEVICE_SPECIFIER", ALC_CAPTURE_DEFAULT_DEVICE_SPECIFIER
},
139 { (ALchar
*)"ALC_CAPTURE_SAMPLES", ALC_CAPTURE_SAMPLES
},
142 { (ALchar
*)"ALC_EFX_MAJOR_VERSION", ALC_EFX_MAJOR_VERSION
},
143 { (ALchar
*)"ALC_EFX_MINOR_VERSION", ALC_EFX_MINOR_VERSION
},
144 { (ALchar
*)"ALC_MAX_AUXILIARY_SENDS", ALC_MAX_AUXILIARY_SENDS
},
147 { (ALchar
*)"ALC_NO_ERROR", ALC_NO_ERROR
},
148 { (ALchar
*)"ALC_INVALID_DEVICE", ALC_INVALID_DEVICE
},
149 { (ALchar
*)"ALC_INVALID_CONTEXT", ALC_INVALID_CONTEXT
},
150 { (ALchar
*)"ALC_INVALID_ENUM", ALC_INVALID_ENUM
},
151 { (ALchar
*)"ALC_INVALID_VALUE", ALC_INVALID_VALUE
},
152 { (ALchar
*)"ALC_OUT_OF_MEMORY", ALC_OUT_OF_MEMORY
},
153 { (ALchar
*)NULL
, (ALenum
)0 }
156 static const ALCchar alcNoError
[] = "No Error";
157 static const ALCchar alcErrInvalidDevice
[] = "Invalid Device";
158 static const ALCchar alcErrInvalidContext
[] = "Invalid Context";
159 static const ALCchar alcErrInvalidEnum
[] = "Invalid Enum";
160 static const ALCchar alcErrInvalidValue
[] = "Invalid Value";
161 static const ALCchar alcErrOutOfMemory
[] = "Out of Memory";
164 static ALCchar alcDeviceList
[2048];
165 static ALCchar alcAllDeviceList
[2048];
166 static ALCchar alcCaptureDeviceList
[2048];
167 // Default is always the first in the list
168 static ALCchar
*alcDefaultDeviceSpecifier
= alcDeviceList
;
169 static ALCchar
*alcDefaultAllDeviceSpecifier
= alcAllDeviceList
;
170 static ALCchar
*alcCaptureDefaultDeviceSpecifier
= alcCaptureDeviceList
;
173 static ALCchar alcExtensionList
[] = "ALC_ENUMERATE_ALL_EXT ALC_ENUMERATION_EXT ALC_EXT_CAPTURE ALC_EXT_EFX";
174 static ALCint alcMajorVersion
= 1;
175 static ALCint alcMinorVersion
= 1;
177 static ALCint alcEFXMajorVersion
= 1;
178 static ALCint alcEFXMinorVersion
= 0;
180 ///////////////////////////////////////////////////////
183 ///////////////////////////////////////////////////////
186 static ALCdevice
*g_pDeviceList
= NULL
;
187 static ALCuint g_ulDeviceCount
= 0;
189 static CRITICAL_SECTION g_csMutex
;
192 static ALCcontext
*g_pContextList
= NULL
;
193 static ALCuint g_ulContextCount
= 0;
196 static ALCenum g_eLastContextError
= ALC_NO_ERROR
;
198 static ALboolean init_done
= AL_FALSE
;
200 ///////////////////////////////////////////////////////
203 ///////////////////////////////////////////////////////
204 // ALC Related helper functions
206 BOOL APIENTRY
DllMain(HANDLE hModule
,DWORD ul_reason_for_call
,LPVOID lpReserved
)
210 // Perform actions based on the reason for calling.
211 switch(ul_reason_for_call
)
213 case DLL_PROCESS_ATTACH
:
214 DisableThreadLibraryCalls(hModule
);
217 case DLL_PROCESS_DETACH
:
226 DeleteCriticalSection(&g_csMutex
);
232 #ifdef HAVE_GCC_DESTRUCTOR
233 static void my_deinit() __attribute__((destructor
));
234 static void my_deinit()
236 static ALenum once
= AL_FALSE
;
237 if(once
|| !init_done
) return;
246 DeleteCriticalSection(&g_csMutex
);
251 static void InitAL(void)
256 const char *devs
, *str
;
260 InitializeCriticalSection(&g_csMutex
);
264 devs
= GetConfigValue(NULL
, "drivers", "");
269 const char *next
= devs
;
275 next
= strchr(devs
, ',');
277 if(!devs
[0] || devs
[0] == ',')
280 len
= (next
? ((size_t)(next
-devs
)) : strlen(devs
));
281 for(n
= i
;BackendList
[n
].Init
;n
++)
283 if(len
== strlen(BackendList
[n
].name
) &&
284 strncmp(BackendList
[n
].name
, devs
, len
) == 0)
286 const char *name
= BackendList
[i
].name
;
287 void (*Init
)(BackendFuncs
*) = BackendList
[i
].Init
;
289 BackendList
[i
].name
= BackendList
[n
].name
;
290 BackendList
[i
].Init
= BackendList
[n
].Init
;
292 BackendList
[n
].name
= name
;
293 BackendList
[n
].Init
= Init
;
300 BackendList
[i
].name
= NULL
;
301 BackendList
[i
].Init
= NULL
;
304 for(i
= 0;BackendList
[i
].Init
;i
++)
305 BackendList
[i
].Init(&BackendList
[i
].Funcs
);
307 str
= GetConfigValue(NULL
, "stereodup", "false");
308 DuplicateStereo
= (strcasecmp(str
, "true") == 0 ||
309 strcasecmp(str
, "yes") == 0 ||
310 strcasecmp(str
, "on") == 0 ||
313 str
= GetConfigValue(NULL
, "excludefx", "");
320 { "reverb", REVERB
},
325 const char *next
= str
;
329 next
= strchr(str
, ',');
331 if(!str
[0] || next
== str
)
334 len
= (next
? ((size_t)(next
-str
)) : strlen(str
));
335 for(n
= 0;EffectList
[n
].name
;n
++)
337 if(len
== strlen(EffectList
[n
].name
) &&
338 strncmp(EffectList
[n
].name
, str
, len
) == 0)
339 DisabledEffects
[EffectList
[n
].type
] = AL_TRUE
;
346 ALCchar
*AppendDeviceList(char *name
)
349 ALCchar
*ret
= alcDeviceList
+pos
;
350 if(pos
>= sizeof(alcDeviceList
))
352 AL_PRINT("Not enough room to add %s!\n", name
);
353 return alcDeviceList
+ sizeof(alcDeviceList
) - 1;
355 pos
+= snprintf(alcDeviceList
+pos
, sizeof(alcDeviceList
)-pos
-1, "%s", name
) + 1;
359 ALCchar
*AppendAllDeviceList(char *name
)
362 ALCchar
*ret
= alcAllDeviceList
+pos
;
363 if(pos
>= sizeof(alcAllDeviceList
))
365 AL_PRINT("Not enough room to add %s!\n", name
);
366 return alcAllDeviceList
+ sizeof(alcAllDeviceList
) - 1;
368 pos
+= snprintf(alcAllDeviceList
+pos
, sizeof(alcAllDeviceList
)-pos
-1, "%s", name
) + 1;
372 ALCchar
*AppendCaptureDeviceList(char *name
)
375 ALCchar
*ret
= alcCaptureDeviceList
+pos
;
376 if(pos
>= sizeof(alcCaptureDeviceList
))
378 AL_PRINT("Not enough room to add %s!\n", name
);
379 return alcCaptureDeviceList
+ sizeof(alcCaptureDeviceList
) - 1;
381 pos
+= snprintf(alcCaptureDeviceList
+pos
, sizeof(alcCaptureDeviceList
)-pos
-1, "%s", name
) + 1;
388 Check pContext is a valid Context pointer
390 static ALCboolean
IsContext(ALCcontext
*pContext
)
392 ALCcontext
*pTempContext
;
394 pTempContext
= g_pContextList
;
395 while (pTempContext
&& pTempContext
!= pContext
)
396 pTempContext
= pTempContext
->next
;
398 return (pTempContext
? ALC_TRUE
: ALC_FALSE
);
405 Store latest ALC Error
407 ALCvoid
SetALCError(ALenum errorCode
)
409 g_eLastContextError
= errorCode
;
418 ALCvoid
SuspendContext(ALCcontext
*pContext
)
421 EnterCriticalSection(&g_csMutex
);
430 ALCvoid
ProcessContext(ALCcontext
*pContext
)
433 LeaveCriticalSection(&g_csMutex
);
440 Initialize Context variables
442 static ALvoid
InitContext(ALCcontext
*pContext
)
446 //Initialise listener
447 pContext
->Listener
.Gain
= 1.0f
;
448 pContext
->Listener
.MetersPerUnit
= 1.0f
;
449 pContext
->Listener
.Position
[0] = 0.0f
;
450 pContext
->Listener
.Position
[1] = 0.0f
;
451 pContext
->Listener
.Position
[2] = 0.0f
;
452 pContext
->Listener
.Velocity
[0] = 0.0f
;
453 pContext
->Listener
.Velocity
[1] = 0.0f
;
454 pContext
->Listener
.Velocity
[2] = 0.0f
;
455 pContext
->Listener
.Forward
[0] = 0.0f
;
456 pContext
->Listener
.Forward
[1] = 0.0f
;
457 pContext
->Listener
.Forward
[2] = -1.0f
;
458 pContext
->Listener
.Up
[0] = 0.0f
;
459 pContext
->Listener
.Up
[1] = 1.0f
;
460 pContext
->Listener
.Up
[2] = 0.0f
;
463 pContext
->LastError
= AL_NO_ERROR
;
464 pContext
->InUse
= AL_FALSE
;
467 pContext
->Frequency
= pContext
->Device
->Frequency
;
470 pContext
->DistanceModel
= AL_INVERSE_DISTANCE_CLAMPED
;
471 pContext
->DopplerFactor
= 1.0f
;
472 pContext
->DopplerVelocity
= 1.0f
;
473 pContext
->flSpeedOfSound
= SPEEDOFSOUNDMETRESPERSEC
;
475 pContext
->lNumStereoSources
= 1;
476 pContext
->lNumMonoSources
= pContext
->Device
->MaxNoOfSources
- pContext
->lNumStereoSources
;
478 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_LOKI_quadriphonic";
480 level
= GetConfigValueInt(NULL
, "cf_level", 0);
481 if(level
> 0 && level
<= 6)
483 pContext
->bs2b
= calloc(1, sizeof(*pContext
->bs2b
));
484 bs2b_set_srate(pContext
->bs2b
, pContext
->Frequency
);
485 bs2b_set_level(pContext
->bs2b
, level
);
493 Clean up Context, destroy any remaining Sources
495 static ALCvoid
ExitContext(ALCcontext
*pContext
)
498 pContext
->LastError
= AL_NO_ERROR
;
499 pContext
->InUse
= AL_FALSE
;
501 free(pContext
->bs2b
);
502 pContext
->bs2b
= NULL
;
505 ///////////////////////////////////////////////////////
508 ///////////////////////////////////////////////////////
509 // ALC Functions calls
512 // This should probably move to another c file but for now ...
513 ALCAPI ALCdevice
* ALCAPIENTRY
alcCaptureOpenDevice(const ALCchar
*deviceName
, ALCuint frequency
, ALCenum format
, ALCsizei SampleSize
)
515 ALCboolean DeviceFound
= ALC_FALSE
;
516 ALCdevice
*pDevice
= NULL
;
523 SetALCError(ALC_INVALID_VALUE
);
527 if(deviceName
&& !deviceName
[0])
530 pDevice
= malloc(sizeof(ALCdevice
));
533 //Initialise device structure
534 memset(pDevice
, 0, sizeof(ALCdevice
));
537 pDevice
->IsCaptureDevice
= AL_TRUE
;
539 pDevice
->Frequency
= frequency
;
540 pDevice
->Format
= format
;
542 for(i
= 0;BackendList
[i
].Init
;i
++)
544 pDevice
->Funcs
= &BackendList
[i
].Funcs
;
545 if(ALCdevice_OpenCapture(pDevice
, deviceName
, frequency
, format
, SampleSize
))
547 SuspendContext(NULL
);
548 pDevice
->next
= g_pDeviceList
;
549 g_pDeviceList
= pDevice
;
551 ProcessContext(NULL
);
553 DeviceFound
= ALC_TRUE
;
560 SetALCError(ALC_INVALID_VALUE
);
566 SetALCError(ALC_OUT_OF_MEMORY
);
571 ALCAPI ALCboolean ALCAPIENTRY
alcCaptureCloseDevice(ALCdevice
*pDevice
)
573 ALCboolean bReturn
= ALC_FALSE
;
576 if ((pDevice
)&&(pDevice
->IsCaptureDevice
))
578 SuspendContext(NULL
);
580 list
= &g_pDeviceList
;
581 while(*list
!= pDevice
)
582 list
= &(*list
)->next
;
584 *list
= (*list
)->next
;
587 ProcessContext(NULL
);
589 ALCdevice_CloseCapture(pDevice
);
595 SetALCError(ALC_INVALID_DEVICE
);
600 ALCAPI
void ALCAPIENTRY
alcCaptureStart(ALCdevice
*pDevice
)
602 if ((pDevice
)&&(pDevice
->IsCaptureDevice
))
603 ALCdevice_StartCapture(pDevice
);
605 SetALCError(ALC_INVALID_DEVICE
);
608 ALCAPI
void ALCAPIENTRY
alcCaptureStop(ALCdevice
*pDevice
)
610 if ((pDevice
)&&(pDevice
->IsCaptureDevice
))
611 ALCdevice_StopCapture(pDevice
);
613 SetALCError(ALC_INVALID_DEVICE
);
616 ALCAPI
void ALCAPIENTRY
alcCaptureSamples(ALCdevice
*pDevice
, ALCvoid
*pBuffer
, ALCsizei lSamples
)
618 if ((pDevice
) && (pDevice
->IsCaptureDevice
))
619 ALCdevice_CaptureSamples(pDevice
, pBuffer
, lSamples
);
621 SetALCError(ALC_INVALID_DEVICE
);
627 Return last ALC generated error code
629 ALCAPI ALCenum ALCAPIENTRY
alcGetError(ALCdevice
*device
)
635 errorCode
= g_eLastContextError
;
636 g_eLastContextError
= ALC_NO_ERROR
;
646 ALCAPI ALCvoid ALCAPIENTRY
alcSuspendContext(ALCcontext
*pContext
)
648 // Not a lot happens here !
658 ALCAPI ALCvoid ALCAPIENTRY
alcProcessContext(ALCcontext
*pContext
)
660 // Not a lot happens here !
668 Returns information about the Device, and error strings
670 ALCAPI
const ALCchar
* ALCAPIENTRY
alcGetString(ALCdevice
*pDevice
,ALCenum param
)
672 const ALCchar
*value
= NULL
;
682 case ALC_INVALID_ENUM
:
683 value
= alcErrInvalidEnum
;
686 case ALC_INVALID_VALUE
:
687 value
= alcErrInvalidValue
;
690 case ALC_INVALID_DEVICE
:
691 value
= alcErrInvalidDevice
;
694 case ALC_INVALID_CONTEXT
:
695 value
= alcErrInvalidContext
;
698 case ALC_OUT_OF_MEMORY
:
699 value
= alcErrOutOfMemory
;
702 case ALC_DEFAULT_DEVICE_SPECIFIER
:
703 value
= alcDefaultDeviceSpecifier
;
706 case ALC_DEVICE_SPECIFIER
:
708 value
= pDevice
->szDeviceName
;
710 value
= alcDeviceList
;
713 case ALC_ALL_DEVICES_SPECIFIER
:
714 value
= alcAllDeviceList
;
717 case ALC_DEFAULT_ALL_DEVICES_SPECIFIER
:
718 value
= alcDefaultAllDeviceSpecifier
;
721 case ALC_CAPTURE_DEVICE_SPECIFIER
:
723 value
= pDevice
->szDeviceName
;
725 value
= alcCaptureDeviceList
;
728 case ALC_CAPTURE_DEFAULT_DEVICE_SPECIFIER
:
729 value
= alcCaptureDefaultDeviceSpecifier
;
733 value
= alcExtensionList
;
737 SetALCError(ALC_INVALID_ENUM
);
748 Returns information about the Device and the version of Open AL
750 ALCAPI ALCvoid ALCAPIENTRY
alcGetIntegerv(ALCdevice
*device
,ALCenum param
,ALsizei size
,ALCint
*data
)
754 if ((device
)&&(device
->IsCaptureDevice
))
756 SuspendContext(NULL
);
761 case ALC_CAPTURE_SAMPLES
:
762 if ((size
) && (data
))
763 *data
= ALCdevice_AvailableSamples(device
);
765 SetALCError(ALC_INVALID_VALUE
);
769 SetALCError(ALC_INVALID_ENUM
);
773 ProcessContext(NULL
);
782 case ALC_MAJOR_VERSION
:
784 SetALCError(ALC_INVALID_VALUE
);
786 *data
= alcMajorVersion
;
789 case ALC_MINOR_VERSION
:
791 SetALCError(ALC_INVALID_VALUE
);
793 *data
= alcMinorVersion
;
796 case ALC_EFX_MAJOR_VERSION
:
798 SetALCError(ALC_INVALID_VALUE
);
800 *data
= alcEFXMajorVersion
;
803 case ALC_EFX_MINOR_VERSION
:
805 SetALCError(ALC_INVALID_VALUE
);
807 *data
= alcEFXMinorVersion
;
810 case ALC_MAX_AUXILIARY_SENDS
:
812 SetALCError(ALC_INVALID_VALUE
);
817 case ALC_ATTRIBUTES_SIZE
:
819 SetALCError(ALC_INVALID_DEVICE
);
821 SetALCError(ALC_INVALID_VALUE
);
826 case ALC_ALL_ATTRIBUTES
:
828 SetALCError(ALC_INVALID_DEVICE
);
830 SetALCError(ALC_INVALID_VALUE
);
835 data
[i
++] = ALC_FREQUENCY
;
836 data
[i
++] = device
->Frequency
;
838 data
[i
++] = ALC_REFRESH
;
839 data
[i
++] = device
->Frequency
/ device
->UpdateSize
;
841 data
[i
++] = ALC_SYNC
;
842 data
[i
++] = ALC_FALSE
;
844 SuspendContext(NULL
);
845 if(device
->Context
&& size
>= 12)
847 data
[i
++] = ALC_MONO_SOURCES
;
848 data
[i
++] = device
->Context
->lNumMonoSources
;
850 data
[i
++] = ALC_STEREO_SOURCES
;
851 data
[i
++] = device
->Context
->lNumStereoSources
;
853 data
[i
++] = ALC_MAX_AUXILIARY_SENDS
;
854 data
[i
++] = MAX_SENDS
;
856 ProcessContext(NULL
);
864 SetALCError(ALC_INVALID_DEVICE
);
866 SetALCError(ALC_INVALID_VALUE
);
868 *data
= device
->Frequency
;
873 SetALCError(ALC_INVALID_DEVICE
);
875 SetALCError(ALC_INVALID_VALUE
);
877 *data
= device
->Frequency
/ device
->UpdateSize
;
882 SetALCError(ALC_INVALID_DEVICE
);
884 SetALCError(ALC_INVALID_VALUE
);
889 case ALC_MONO_SOURCES
:
890 if(!device
|| !device
->Context
)
891 SetALCError(ALC_INVALID_DEVICE
);
893 SetALCError(ALC_INVALID_VALUE
);
895 *data
= device
->Context
->lNumMonoSources
;
898 case ALC_STEREO_SOURCES
:
899 if(!device
|| !device
->Context
)
900 SetALCError(ALC_INVALID_DEVICE
);
902 SetALCError(ALC_INVALID_VALUE
);
904 *data
= device
->Context
->lNumStereoSources
;
908 SetALCError(ALC_INVALID_ENUM
);
913 SetALCError(ALC_INVALID_VALUE
);
921 alcIsExtensionPresent
923 Determines if there is support for a particular extension
925 ALCAPI ALCboolean ALCAPIENTRY
alcIsExtensionPresent(ALCdevice
*device
, const ALCchar
*extName
)
927 ALCboolean bResult
= ALC_FALSE
;
936 len
= strlen(extName
);
937 ptr
= alcExtensionList
;
940 if(strncasecmp(ptr
, extName
, len
) == 0 &&
941 (ptr
[len
] == '\0' || isspace(ptr
[len
])))
946 if((ptr
=strchr(ptr
, ' ')) != NULL
)
950 } while(isspace(*ptr
));
955 SetALCError(ALC_INVALID_VALUE
);
964 Retrieves the function address for a particular extension function
966 ALCAPI ALCvoid
* ALCAPIENTRY
alcGetProcAddress(ALCdevice
*device
, const ALCchar
*funcName
)
968 ALCvoid
*pFunction
= NULL
;
975 while(alcFunctions
[i
].funcName
&&
976 strcmp(alcFunctions
[i
].funcName
,funcName
) != 0)
978 pFunction
= alcFunctions
[i
].address
;
981 SetALCError(ALC_INVALID_VALUE
);
990 Get the value for a particular ALC Enumerated Value
992 ALCAPI ALCenum ALCAPIENTRY
alcGetEnumValue(ALCdevice
*device
, const ALCchar
*enumName
)
999 while ((enumeration
[i
].enumName
)&&(strcmp(enumeration
[i
].enumName
,enumName
)))
1001 val
= enumeration
[i
].value
;
1003 if(!enumeration
[i
].enumName
)
1004 SetALCError(ALC_INVALID_VALUE
);
1013 Create and attach a Context to a particular Device.
1015 ALCAPI ALCcontext
* ALCAPIENTRY
alcCreateContext(ALCdevice
*device
, const ALCint
*attrList
)
1017 ALCcontext
*ALContext
= NULL
;
1018 ALuint ulAttributeIndex
, ulRequestedStereoSources
;
1020 if ((device
)&&(!device
->IsCaptureDevice
))
1022 // Reset Context Last Error code
1023 g_eLastContextError
= ALC_NO_ERROR
;
1025 // Current implementation only allows one Context per Device
1026 if(!device
->Context
)
1028 ALContext
= calloc(1, sizeof(ALCcontext
));
1031 SetALCError(ALC_OUT_OF_MEMORY
);
1035 ALContext
->Device
= device
;
1036 InitContext(ALContext
);
1038 device
->Context
= ALContext
;
1040 SuspendContext(NULL
);
1042 ALContext
->next
= g_pContextList
;
1043 g_pContextList
= ALContext
;
1046 ProcessContext(NULL
);
1048 // Check for Voice Count attributes
1051 ulAttributeIndex
= 0;
1052 while ((ulAttributeIndex
< 10) && (attrList
[ulAttributeIndex
]))
1054 if (attrList
[ulAttributeIndex
] == ALC_STEREO_SOURCES
)
1056 ulRequestedStereoSources
= attrList
[ulAttributeIndex
+ 1];
1058 if (ulRequestedStereoSources
> ALContext
->Device
->MaxNoOfSources
)
1059 ulRequestedStereoSources
= ALContext
->Device
->MaxNoOfSources
;
1061 ALContext
->lNumStereoSources
= ulRequestedStereoSources
;
1062 ALContext
->lNumMonoSources
= ALContext
->Device
->MaxNoOfSources
- ALContext
->lNumStereoSources
;
1066 ulAttributeIndex
+= 2;
1072 SetALCError(ALC_INVALID_VALUE
);
1077 SetALCError(ALC_INVALID_DEVICE
);
1088 ALCAPI ALCvoid ALCAPIENTRY
alcDestroyContext(ALCcontext
*context
)
1094 // Lock context list
1095 SuspendContext(NULL
);
1097 if (IsContext(context
))
1100 SuspendContext(context
);
1102 ReleaseALSources(context
);
1103 ReleaseALAuxiliaryEffectSlots(context
);
1105 context
->Device
->Context
= NULL
;
1107 list
= &g_pContextList
;
1108 while(*list
!= context
)
1109 list
= &(*list
)->next
;
1111 *list
= (*list
)->next
;
1115 ProcessContext(context
);
1117 ExitContext(context
);
1119 // Free memory (MUST do this after ProcessContext)
1120 memset(context
, 0, sizeof(ALCcontext
));
1124 SetALCError(ALC_INVALID_CONTEXT
);
1126 ProcessContext(NULL
);
1131 alcGetCurrentContext
1133 Returns the currently active Context
1135 ALCAPI ALCcontext
* ALCAPIENTRY
alcGetCurrentContext(ALCvoid
)
1137 ALCcontext
*pContext
= NULL
;
1141 SuspendContext(NULL
);
1143 pContext
= g_pContextList
;
1144 while ((pContext
) && (!pContext
->InUse
))
1145 pContext
= pContext
->next
;
1147 ProcessContext(NULL
);
1154 alcGetContextsDevice
1156 Returns the Device that a particular Context is attached to
1158 ALCAPI ALCdevice
* ALCAPIENTRY
alcGetContextsDevice(ALCcontext
*pContext
)
1160 ALCdevice
*pDevice
= NULL
;
1164 SuspendContext(NULL
);
1165 if (IsContext(pContext
))
1166 pDevice
= pContext
->Device
;
1168 SetALCError(ALC_INVALID_CONTEXT
);
1169 ProcessContext(NULL
);
1176 alcMakeContextCurrent
1178 Makes the given Context the active Context
1180 ALCAPI ALCboolean ALCAPIENTRY
alcMakeContextCurrent(ALCcontext
*context
)
1182 ALCcontext
*ALContext
;
1183 ALboolean bReturn
= AL_TRUE
;
1187 SuspendContext(NULL
);
1189 // context must be a valid Context or NULL
1190 if ((IsContext(context
)) || (context
== NULL
))
1192 if ((ALContext
=alcGetCurrentContext()))
1194 SuspendContext(ALContext
);
1195 ALContext
->InUse
=AL_FALSE
;
1196 ProcessContext(ALContext
);
1199 if ((ALContext
=context
) && (ALContext
->Device
))
1201 SuspendContext(ALContext
);
1202 ALContext
->InUse
=AL_TRUE
;
1203 ProcessContext(ALContext
);
1208 SetALCError(ALC_INVALID_CONTEXT
);
1212 ProcessContext(NULL
);
1221 Open the Device specified.
1223 ALCAPI ALCdevice
* ALCAPIENTRY
alcOpenDevice(const ALCchar
*deviceName
)
1225 ALboolean bDeviceFound
= AL_FALSE
;
1231 if(deviceName
&& !deviceName
[0])
1234 device
= malloc(sizeof(ALCdevice
));
1239 //Initialise device structure
1240 memset(device
, 0, sizeof(ALCdevice
));
1243 device
->IsCaptureDevice
= AL_FALSE
;
1246 device
->Frequency
= GetConfigValueInt(NULL
, "frequency", SWMIXER_OUTPUT_RATE
);
1247 if((ALint
)device
->Frequency
<= 0)
1248 device
->Frequency
= SWMIXER_OUTPUT_RATE
;
1250 fmt
= GetConfigValue(NULL
, "format", "AL_FORMAT_STEREO16");
1252 device
->Format
= alGetEnumValue(fmt
);
1254 if(!aluChannelsFromFormat(device
->Format
))
1255 device
->Format
= AL_FORMAT_STEREO16
;
1257 device
->UpdateSize
= GetConfigValueInt(NULL
, "refresh", 4096);
1258 if((ALint
)device
->UpdateSize
<= 0)
1259 device
->UpdateSize
= 4096;
1261 device
->MaxNoOfSources
= GetConfigValueInt(NULL
, "sources", 256);
1262 if((ALint
)device
->MaxNoOfSources
<= 0)
1263 device
->MaxNoOfSources
= 256;
1265 // Find a playback device to open
1266 for(i
= 0;BackendList
[i
].Init
;i
++)
1268 device
->Funcs
= &BackendList
[i
].Funcs
;
1269 if(ALCdevice_OpenPlayback(device
, deviceName
))
1271 SuspendContext(NULL
);
1272 device
->next
= g_pDeviceList
;
1273 g_pDeviceList
= device
;
1275 ProcessContext(NULL
);
1277 bDeviceFound
= AL_TRUE
;
1284 // No suitable output device found
1285 SetALCError(ALC_INVALID_VALUE
);
1291 SetALCError(ALC_OUT_OF_MEMORY
);
1300 Close the specified Device
1302 ALCAPI ALCboolean ALCAPIENTRY
alcCloseDevice(ALCdevice
*pDevice
)
1304 ALCboolean bReturn
= ALC_FALSE
;
1307 if ((pDevice
)&&(!pDevice
->IsCaptureDevice
))
1309 SuspendContext(NULL
);
1311 list
= &g_pDeviceList
;
1312 while(*list
!= pDevice
)
1313 list
= &(*list
)->next
;
1315 *list
= (*list
)->next
;
1318 ProcessContext(NULL
);
1320 if(pDevice
->Context
)
1323 AL_PRINT("alcCloseDevice(): destroying 1 Context\n");
1325 alcDestroyContext(pDevice
->Context
);
1327 ALCdevice_ClosePlayback(pDevice
);
1329 //Release device structure
1330 memset(pDevice
, 0, sizeof(ALCdevice
));
1336 SetALCError(ALC_INVALID_DEVICE
);
1342 ALCvoid
ReleaseALC(ALCvoid
)
1345 if(g_ulDeviceCount
> 0)
1346 AL_PRINT("exit(): closing %u Device%s\n", g_ulDeviceCount
, (g_ulDeviceCount
>1)?"s":"");
1349 while(g_pDeviceList
)
1351 if(g_pDeviceList
->IsCaptureDevice
)
1352 alcCaptureCloseDevice(g_pDeviceList
);
1354 alcCloseDevice(g_pDeviceList
);
1358 ///////////////////////////////////////////////////////