OpenAL32/Include/alMain.h

   1 #ifndef AL_MAIN_H
   2 #define AL_MAIN_H
   3
   4 #include <string.h>
   5 #include <stdio.h>
   6 #include <stdarg.h>
   7
   8 #ifdef HAVE_FENV_H
   9 #include <fenv.h>
  10 #endif
  11
  12 #include "AL/al.h"
  13 #include "AL/alc.h"
  14 #include "AL/alext.h"
  15
  16 #ifdef _WIN32
  17
  18 #ifndef _WIN32_WINNT
  19 #define _WIN32_WINNT 0x0500
  20 #endif
  21 #include <windows.h>
  22
  23 typedef DWORD tls_type;
  24 #define tls_create(x) (*(x) = TlsAlloc())
  25 #define tls_delete(x) TlsFree((x))
  26 #define tls_get(x) TlsGetValue((x))
  27 #define tls_set(x, a) TlsSetValue((x), (a))
  28
  29 #else
  30
  31 #include <unistd.h>
  32 #include <assert.h>
  33 #include <pthread.h>
  34 #ifdef HAVE_PTHREAD_NP_H
  35 #include <pthread_np.h>
  36 #endif
  37 #include <sys/time.h>
  38 #include <time.h>
  39 #include <errno.h>
  40
  41 #define IsBadWritePtr(a,b) ((a) == NULL && (b) != 0)
  42
  43 typedef pthread_key_t tls_type;
  44 #define tls_create(x) pthread_key_create((x), NULL)
  45 #define tls_delete(x) pthread_key_delete((x))
  46 #define tls_get(x) pthread_getspecific((x))
  47 #define tls_set(x, a) pthread_setspecific((x), (a))
  48
  49 typedef pthread_mutex_t CRITICAL_SECTION;
  50 static inline void EnterCriticalSection(CRITICAL_SECTION *cs)
  51 {
  52     int ret;
  53     ret = pthread_mutex_lock(cs);
  54     assert(ret == 0);
  55 }
  56 static inline void LeaveCriticalSection(CRITICAL_SECTION *cs)
  57 {
  58     int ret;
  59     ret = pthread_mutex_unlock(cs);
  60     assert(ret == 0);
  61 }
  62 static inline void InitializeCriticalSection(CRITICAL_SECTION *cs)
  63 {
  64     pthread_mutexattr_t attrib;
  65     int ret;
  66
  67     ret = pthread_mutexattr_init(&attrib);
  68     assert(ret == 0);
  69
  70     ret = pthread_mutexattr_settype(&attrib, PTHREAD_MUTEX_RECURSIVE);
  71 #ifdef HAVE_PTHREAD_NP_H
  72     if(ret != 0)
  73         ret = pthread_mutexattr_setkind_np(&attrib, PTHREAD_MUTEX_RECURSIVE);
  74 #endif
  75     assert(ret == 0);
  76     ret = pthread_mutex_init(cs, &attrib);
  77     assert(ret == 0);
  78
  79     pthread_mutexattr_destroy(&attrib);
  80 }
  81
  82 static inline void DeleteCriticalSection(CRITICAL_SECTION *cs)
  83 {
  84     int ret;
  85     ret = pthread_mutex_destroy(cs);
  86     assert(ret == 0);
  87 }
  88
  89 /* NOTE: This wrapper isn't quite accurate as it returns an ALuint, as opposed
  90  * to the expected DWORD. Both are defined as unsigned 32-bit types, however.
  91  * Additionally, Win32 is supposed to measure the time since Windows started,
  92  * as opposed to the actual time. */
  93 static inline ALuint timeGetTime(void)
  94 {
  95     int ret;
  96 #ifdef _POSIX_TIMERS
  97     struct timespec ts;
  98
  99     ret = clock_gettime(CLOCK_REALTIME, &ts);
 100     assert(ret == 0);
 101
 102     return ts.tv_nsec/1000000 + ts.tv_sec*1000;
 103 #else
 104     struct timeval tv;
 105
 106     ret = gettimeofday(&tv, NULL);
 107     assert(ret == 0);
 108
 109     return tv.tv_usec/1000 + tv.tv_sec*1000;
 110 #endif
 111 }
 112
 113 static inline void Sleep(ALuint t)
 114 {
 115     struct timespec tv, rem;
 116     tv.tv_nsec = (t*1000000)%1000000000;
 117     tv.tv_sec = t/1000;
 118
 119     while(nanosleep(&tv, &rem) == -1 && errno == EINTR)
 120         tv = rem;
 121 }
 122 #define min(x,y) (((x)<(y))?(x):(y))
 123 #define max(x,y) (((x)>(y))?(x):(y))
 124 #endif
 125
 126 #include "alListener.h"
 127 #include "alu.h"
 128
 129 #ifdef __cplusplus
 130 extern "C" {
 131 #endif
 132
 133 static __inline void al_print(const char *fname, unsigned int line, const char *fmt, ...)
 134 {
 135     const char *fn;
 136     char str[256];
 137     int i;
 138
 139     fn = strrchr(fname, '/');
 140     if(!fn) fn = strrchr(fname, '\\');;
 141     if(!fn) fn = fname;
 142     else fn += 1;
 143
 144     i = snprintf(str, sizeof(str), "AL lib: %s:%d: ", fn, line);
 145     if(i < (int)sizeof(str) && i > 0)
 146     {
 147         va_list ap;
 148         va_start(ap, fmt);
 149         vsnprintf(str+i, sizeof(str)-i, fmt, ap);
 150         va_end(ap);
 151     }
 152     str[sizeof(str)-1] = 0;
 153
 154     fprintf(stderr, "%s", str);
 155 }
 156 #define AL_PRINT(...) al_print(__FILE__, __LINE__, __VA_ARGS__)
 157
 158
 159 #define SWMIXER_OUTPUT_RATE        44100
 160
 161 #define SPEEDOFSOUNDMETRESPERSEC   (343.3f)
 162 #define AIRABSORBGAINDBHF          (-0.05f)
 163
 164 #define LOWPASSFREQCUTOFF          (5000)
 165
 166 #define DEFAULT_HEAD_DAMPEN        (0.25f)
 167
 168
 169 // Find the next power-of-2 for non-power-of-2 numbers.
 170 static __inline ALuint NextPowerOf2(ALuint value)
 171 {
 172     ALuint powerOf2 = 1;
 173
 174     if(value)
 175     {
 176         value--;
 177         while(value)
 178         {
 179             value >>= 1;
 180             powerOf2 <<= 1;
 181         }
 182     }
 183     return powerOf2;
 184 }
 185
 186
 187 typedef struct {
 188     ALCboolean (*OpenPlayback)(ALCdevice*, const ALCchar*);
 189     void (*ClosePlayback)(ALCdevice*);
 190     ALCboolean (*ResetPlayback)(ALCdevice*);
 191     void (*StopPlayback)(ALCdevice*);
 192
 193     ALCboolean (*OpenCapture)(ALCdevice*, const ALCchar*);
 194     void (*CloseCapture)(ALCdevice*);
 195     void (*StartCapture)(ALCdevice*);
 196     void (*StopCapture)(ALCdevice*);
 197     void (*CaptureSamples)(ALCdevice*, void*, ALCuint);
 198     ALCuint (*AvailableSamples)(ALCdevice*);
 199 } BackendFuncs;
 200
 201 enum {
 202     DEVICE_PROBE,
 203     ALL_DEVICE_PROBE,
 204     CAPTURE_DEVICE_PROBE
 205 };
 206
 207 void alc_alsa_init(BackendFuncs *func_list);
 208 void alc_alsa_deinit(void);
 209 void alc_alsa_probe(int type);
 210 void alc_oss_init(BackendFuncs *func_list);
 211 void alc_oss_deinit(void);
 212 void alc_oss_probe(int type);
 213 void alc_solaris_init(BackendFuncs *func_list);
 214 void alc_solaris_deinit(void);
 215 void alc_solarise_probe(int type);
 216 void alcDSoundInit(BackendFuncs *func_list);
 217 void alcDSoundDeinit(void);
 218 void alcDSoundProbe(int type);
 219 void alcWinMMInit(BackendFuncs *FuncList);
 220 void alcWinMMDeinit(void);
 221 void alcWinMMProbe(int type);
 222 void alc_pa_init(BackendFuncs *func_list);
 223 void alc_pa_deinit(void);
 224 void alc_pa_probe(int type);
 225 void alc_wave_init(BackendFuncs *func_list);
 226 void alc_wave_deinit(void);
 227 void alc_wave_probe(int type);
 228 void alc_pulse_init(BackendFuncs *func_list);
 229 void alc_pulse_deinit(void);
 230 void alc_pulse_probe(int type);
 231
 232
 233 struct ALCdevice_struct
 234 {
 235     ALCboolean   Connected;
 236     ALboolean    IsCaptureDevice;
 237
 238     ALuint       Frequency;
 239     ALuint       UpdateSize;
 240     ALuint       NumUpdates;
 241     ALenum       Format;
 242
 243     ALCchar      *szDeviceName;
 244
 245     // Maximum number of sources that can be created
 246     ALuint       MaxNoOfSources;
 247     // Maximum number of slots that can be created
 248     ALuint       AuxiliaryEffectSlotMax;
 249
 250     ALint        lNumMonoSources;
 251     ALint        lNumStereoSources;
 252     ALuint       NumAuxSends;
 253
 254     // Linked List of Buffers for this device
 255     struct ALbuffer *Buffers;
 256     ALuint          BufferCount;
 257
 258     // Linked List of Effects for this device
 259     struct ALeffect *EffectList;
 260     ALuint          EffectCount;
 261
 262     // Linked List of Filters for this device
 263     struct ALfilter *FilterList;
 264     ALuint          FilterCount;
 265
 266     // Linked List of Databuffers for this device
 267     struct ALdatabuffer *Databuffers;
 268     ALuint              DatabufferCount;
 269
 270     // Stereo-to-binaural filter
 271     struct bs2b *Bs2b;
 272     ALCint       Bs2bLevel;
 273
 274     // Simulated dampening from head occlusion
 275     ALfloat      HeadDampen;
 276
 277     // Dry path buffer mix
 278     float DryBuffer[BUFFERSIZE][OUTPUTCHANNELS];
 279
 280     Channel DevChannels[OUTPUTCHANNELS];
 281
 282     // Contexts created on this device
 283     ALCcontext  **Contexts;
 284     ALuint        NumContexts;
 285
 286     BackendFuncs *Funcs;
 287     void         *ExtraData; // For the backend's use
 288
 289     ALCdevice *next;
 290 };
 291
 292 #define ALCdevice_OpenPlayback(a,b)      ((a)->Funcs->OpenPlayback((a), (b)))
 293 #define ALCdevice_ClosePlayback(a)       ((a)->Funcs->ClosePlayback((a)))
 294 #define ALCdevice_ResetPlayback(a)       ((a)->Funcs->ResetPlayback((a)))
 295 #define ALCdevice_StopPlayback(a)        ((a)->Funcs->StopPlayback((a)))
 296 #define ALCdevice_OpenCapture(a,b)       ((a)->Funcs->OpenCapture((a), (b)))
 297 #define ALCdevice_CloseCapture(a)        ((a)->Funcs->CloseCapture((a)))
 298 #define ALCdevice_StartCapture(a)        ((a)->Funcs->StartCapture((a)))
 299 #define ALCdevice_StopCapture(a)         ((a)->Funcs->StopCapture((a)))
 300 #define ALCdevice_CaptureSamples(a,b,c)  ((a)->Funcs->CaptureSamples((a), (b), (c)))
 301 #define ALCdevice_AvailableSamples(a)    ((a)->Funcs->AvailableSamples((a)))
 302
 303 struct ALCcontext_struct
 304 {
 305     ALlistener  Listener;
 306
 307     struct ALsource *Source;
 308     ALuint           SourceCount;
 309
 310     struct ALeffectslot *AuxiliaryEffectSlot;
 311     ALuint               AuxiliaryEffectSlotCount;
 312
 313     struct ALdatabuffer *SampleSource;
 314     struct ALdatabuffer *SampleSink;
 315
 316     ALenum      LastError;
 317     ALboolean   InUse;
 318
 319     ALenum      DistanceModel;
 320     ALboolean   SourceDistanceModel;
 321
 322     ALfloat     DopplerFactor;
 323     ALfloat     DopplerVelocity;
 324     ALfloat     flSpeedOfSound;
 325
 326     ALfloat     PanningLUT[OUTPUTCHANNELS * LUT_NUM];
 327     ALint       NumChan;
 328
 329     ALfloat     ChannelMatrix[OUTPUTCHANNELS][OUTPUTCHANNELS];
 330
 331     ALCdevice  *Device;
 332     const ALCchar *ExtensionList;
 333
 334     ALCcontext *next;
 335 };
 336
 337 extern ALint RTPrioLevel;
 338
 339 ALCvoid ReleaseALC(ALCvoid);
 340
 341 void AppendDeviceList(const ALCchar *name);
 342 void AppendAllDeviceList(const ALCchar *name);
 343 void AppendCaptureDeviceList(const ALCchar *name);
 344
 345 ALCvoid alcSetError(ALenum errorCode);
 346
 347 ALCvoid SuspendContext(ALCcontext *context);
 348 ALCvoid ProcessContext(ALCcontext *context);
 349
 350 ALvoid *StartThread(ALuint (*func)(ALvoid*), ALvoid *ptr);
 351 ALuint StopThread(ALvoid *thread);
 352
 353 ALCcontext *GetContextSuspended(void);
 354
 355 typedef struct RingBuffer RingBuffer;
 356 RingBuffer *CreateRingBuffer(ALsizei frame_size, ALsizei length);
 357 void DestroyRingBuffer(RingBuffer *ring);
 358 ALsizei RingBufferSize(RingBuffer *ring);
 359 void WriteRingBuffer(RingBuffer *ring, const ALubyte *data, ALsizei len);
 360 void ReadRingBuffer(RingBuffer *ring, ALubyte *data, ALsizei len);
 361
 362 void ReadALConfig(void);
 363 void FreeALConfig(void);
 364 const char *GetConfigValue(const char *blockName, const char *keyName, const char *def);
 365 int GetConfigValueInt(const char *blockName, const char *keyName, int def);
 366 float GetConfigValueFloat(const char *blockName, const char *keyName, float def);
 367 int GetConfigValueBool(const char *blockName, const char *keyName, float def);
 368
 369 void EnableRTPrio(ALint level);
 370
 371 void SetDefaultChannelOrder(ALCdevice *device);
 372 void SetDefaultWFXChannelOrder(ALCdevice *device);
 373
 374 ALCboolean  ALCAPIENTRY alcMakeCurrent(ALCcontext *context);
 375 ALCcontext* ALCAPIENTRY alcGetThreadContext(void);
 376
 377 #ifdef __cplusplus
 378 }
 379 #endif
 380
 381 #endif