OpenAL32/Include/alMain.h

   1 #ifndef AL_MAIN_H
   2 #define AL_MAIN_H
   3
   4 #include <string.h>
   5 #include <stdio.h>
   6
   7 #include "alu.h"
   8
   9 #ifdef _WIN32
  10
  11 #include <windows.h>
  12
  13 #else
  14
  15 #include <assert.h>
  16 #include <pthread.h>
  17 #include <sys/time.h>
  18 #include <time.h>
  19 #include <errno.h>
  20
  21 #define IsBadWritePtr(a,b) (0)
  22
  23 typedef pthread_mutex_t CRITICAL_SECTION;
  24 static inline void EnterCriticalSection(CRITICAL_SECTION *cs)
  25 {
  26     int ret;
  27     ret = pthread_mutex_lock(cs);
  28     assert(ret == 0);
  29 }
  30 static inline void LeaveCriticalSection(CRITICAL_SECTION *cs)
  31 {
  32     int ret;
  33     ret = pthread_mutex_unlock(cs);
  34     assert(ret == 0);
  35 }
  36 static inline void InitializeCriticalSection(CRITICAL_SECTION *cs)
  37 {
  38     pthread_mutexattr_t attrib;
  39     int ret;
  40
  41     ret = pthread_mutexattr_init(&attrib);
  42     assert(ret == 0);
  43
  44     ret = pthread_mutexattr_settype(&attrib, PTHREAD_MUTEX_RECURSIVE);
  45     assert(ret == 0);
  46     ret = pthread_mutex_init(cs, &attrib);
  47     assert(ret == 0);
  48
  49     pthread_mutexattr_destroy(&attrib);
  50 }
  51
  52 static inline void DeleteCriticalSection(CRITICAL_SECTION *cs)
  53 {
  54     int ret;
  55     ret = pthread_mutex_destroy(cs);
  56     assert(ret == 0);
  57 }
  58
  59 /* NOTE: This wrapper isn't quite accurate as it returns an ALuint, as opposed
  60  * to the expected DWORD. Both are defined as unsigned 32-bit types, however.
  61  * Additionally, Win32 is supposed to measure the time since Windows started,
  62  * as opposed to the actual time. */
  63 static inline ALuint timeGetTime(void)
  64 {
  65     struct timeval tv;
  66     int ret;
  67
  68     ret = gettimeofday(&tv, NULL);
  69     assert(ret == 0);
  70
  71     return tv.tv_usec/1000 + tv.tv_sec*1000;
  72 }
  73
  74 static inline void Sleep(ALuint t)
  75 {
  76     struct timespec tv, rem;
  77     tv.tv_nsec = (t*1000000)%1000000000;
  78     tv.tv_sec = t/1000;
  79
  80     while(nanosleep(&tv, &rem) == -1 && errno == EINTR)
  81         tv = rem;
  82 }
  83 #define min(x,y) (((x)<(y))?(x):(y))
  84 #define max(x,y) (((x)>(y))?(x):(y))
  85 #endif
  86
  87 #include "AL/al.h"
  88 #include "AL/alc.h"
  89 #include "AL/alext.h"
  90 #include "alListener.h"
  91
  92 #ifdef __cplusplus
  93 extern "C" {
  94 #endif
  95
  96 extern CRITICAL_SECTION _alMutex;
  97
  98 extern char _alDebug[256];
  99
 100 #define AL_PRINT(...) do {                       \
 101     int _al_print_i;                             \
 102     char *_al_print_fn = strrchr(__FILE__, '/'); \
 103     if(!_al_print_fn) _al_print_fn  = __FILE__;  \
 104     else              _al_print_fn += 1;         \
 105     _al_print_i = snprintf(_alDebug, sizeof(_alDebug), "AL lib: %s:%d: ", _al_print_fn, __LINE__); \
 106     if(_al_print_i < (int)sizeof(_alDebug) && _al_print_i > 0) \
 107         snprintf(_alDebug+_al_print_i, sizeof(_alDebug)-_al_print_i, __VA_ARGS__); \
 108     _alDebug[sizeof(_alDebug)-1] = 0;            \
 109     fprintf(stderr, "%s", _alDebug);             \
 110 } while(0)
 111
 112
 113 #define SWMIXER_OUTPUT_RATE        44100
 114
 115 #define SPEEDOFSOUNDMETRESPERSEC   (343.3f)
 116 #define AIRABSORBGAINHF            (0.994f)
 117
 118 typedef struct {
 119     ALCboolean (*OpenPlayback)(ALCdevice*, const ALCchar*);
 120     void (*ClosePlayback)(ALCdevice*);
 121
 122     ALCboolean (*OpenCapture)(ALCdevice*, const ALCchar*, ALCuint, ALCenum, ALCsizei);
 123     void (*CloseCapture)(ALCdevice*);
 124     void (*StartCapture)(ALCdevice*);
 125     void (*StopCapture)(ALCdevice*);
 126     void (*CaptureSamples)(ALCdevice*, void*, ALCuint);
 127     ALCuint (*AvailableSamples)(ALCdevice*);
 128 } BackendFuncs;
 129
 130 void alc_alsa_init(BackendFuncs *func_list);
 131 void alc_oss_init(BackendFuncs *func_list);
 132 void alcDSoundInit(BackendFuncs *func_list);
 133 void alcWinMMInit(BackendFuncs *FuncList);
 134 void alc_wave_init(BackendFuncs *func_list);
 135
 136
 137 struct ALCdevice_struct
 138 {
 139     ALboolean    IsCaptureDevice;
 140
 141     ALuint       Frequency;
 142     ALuint       UpdateSize;
 143     ALuint       FrameSize;
 144     ALenum       Format;
 145
 146     ALCchar      *szDeviceName;
 147
 148     // Maximum number of sources that can be created
 149     ALuint       MaxNoOfSources;
 150
 151     // Context created on this device
 152     ALCcontext   *Context;
 153
 154     BackendFuncs *Funcs;
 155     void         *ExtraData; // For the backend's use
 156
 157     ALCdevice *next;
 158 };
 159
 160 #define ALCdevice_OpenPlayback(a,b)      ((a)->Funcs->OpenPlayback((a), (b)))
 161 #define ALCdevice_ClosePlayback(a)       ((a)->Funcs->ClosePlayback((a)))
 162 #define ALCdevice_OpenCapture(a,b,c,d,e) ((a)->Funcs->OpenCapture((a), (b), (c), (d), (e)))
 163 #define ALCdevice_CloseCapture(a)        ((a)->Funcs->CloseCapture((a)))
 164 #define ALCdevice_StartCapture(a)        ((a)->Funcs->StartCapture((a)))
 165 #define ALCdevice_StopCapture(a)         ((a)->Funcs->StopCapture((a)))
 166 #define ALCdevice_CaptureSamples(a,b,c)  ((a)->Funcs->CaptureSamples((a), (b), (c)))
 167 #define ALCdevice_AvailableSamples(a)    ((a)->Funcs->AvailableSamples((a)))
 168
 169 struct ALCcontext_struct
 170 {
 171     ALlistener  Listener;
 172
 173     struct ALsource *Source;
 174     ALuint           SourceCount;
 175
 176     struct ALeffectslot *AuxiliaryEffectSlot;
 177     ALuint               AuxiliaryEffectSlotCount;
 178
 179     ALenum      LastError;
 180     ALboolean   InUse;
 181
 182     ALuint      Frequency;
 183
 184     ALenum      DistanceModel;
 185
 186     ALfloat     DopplerFactor;
 187     ALfloat     DopplerVelocity;
 188     ALfloat     flSpeedOfSound;
 189
 190     ALint       lNumMonoSources;
 191     ALint       lNumStereoSources;
 192
 193     ALCdevice  *Device;
 194     ALCchar     ExtensionList[1024];
 195
 196     struct bs2b *bs2b;
 197
 198     ALCcontext *next;
 199 };
 200
 201 ALCvoid ReleaseALC(ALCvoid);
 202
 203 ALCchar *AppendDeviceList(char *name);
 204 ALCchar *AppendAllDeviceList(char *name);
 205 ALCchar *AppendCaptureDeviceList(char *name);
 206
 207 ALCvoid SetALCError(ALenum errorCode);
 208
 209 ALCvoid SuspendContext(ALCcontext *context);
 210 ALCvoid ProcessContext(ALCcontext *context);
 211
 212 ALvoid *StartThread(ALuint (*func)(ALvoid*), ALvoid *ptr);
 213 ALuint StopThread(ALvoid *thread);
 214
 215 typedef struct RingBuffer RingBuffer;
 216 RingBuffer *CreateRingBuffer(ALsizei frame_size, ALsizei length);
 217 void DestroyRingBuffer(RingBuffer *ring);
 218 ALsizei RingBufferSize(RingBuffer *ring);
 219 void WriteRingBuffer(RingBuffer *ring, const ALubyte *data, ALsizei len);
 220 void ReadRingBuffer(RingBuffer *ring, ALubyte *data, ALsizei len);
 221
 222 void ReadALConfig(void);
 223 void FreeALConfig(void);
 224 const char *GetConfigValue(const char *blockName, const char *keyName, const char *def);
 225 int GetConfigValueInt(const char *blockName, const char *keyName, int def);
 226 float GetConfigValueFloat(const char *blockName, const char *keyName, float def);
 227
 228 #ifdef __cplusplus
 229 }
 230 #endif
 231
 232 #endif