#ifndef _ALU_H_ #define _ALU_H_ #include "AL/al.h" #include "AL/alc.h" #include "AL/alext.h" #include <math.h> #ifdef HAVE_FLOAT_H #include <float.h> #endif #ifndef M_PI #define M_PI 3.14159265358979323846 /* pi */ #define M_PI_2 1.57079632679489661923 /* pi/2 */ #endif #ifdef HAVE_POWF #define aluPow(x,y) ((ALfloat)powf((float)(x),(float)(y))) #else #define aluPow(x,y) ((ALfloat)pow((double)(x),(double)(y))) #endif #ifdef HAVE_SQRTF #define aluSqrt(x) ((ALfloat)sqrtf((float)(x))) #else #define aluSqrt(x) ((ALfloat)sqrt((double)(x))) #endif #ifdef HAVE_ACOSF #define aluAcos(x) ((ALfloat)acosf((float)(x))) #else #define aluAcos(x) ((ALfloat)acos((double)(x))) #endif #ifdef HAVE_ATANF #define aluAtan(x) ((ALfloat)atanf((float)(x))) #else #define aluAtan(x) ((ALfloat)atan((double)(x))) #endif #ifdef HAVE_FABSF #define aluFabs(x) ((ALfloat)fabsf((float)(x))) #else #define aluFabs(x) ((ALfloat)fabs((double)(x))) #endif // fixes for mingw32. #if defined(max) && !defined(__max) #define __max max #endif #if defined(min) && !defined(__min) #define __min min #endif #define QUADRANT_NUM 128 #define LUT_NUM (4 * QUADRANT_NUM) #ifdef __cplusplus extern "C" { #endif typedef enum { FRONT_LEFT = 0, FRONT_RIGHT, FRONT_CENTER, LFE, BACK_LEFT, BACK_RIGHT, BACK_CENTER, SIDE_LEFT, SIDE_RIGHT, OUTPUTCHANNELS } Channel; #define BUFFERSIZE 16384 /* NOTE: The AL_FORMAT_REAR* enums aren't handled here be cause they're * converted to AL_FORMAT_QUAD* when loaded */ static __inline ALuint aluBytesFromFormat(ALenum format) { switch(format) { case AL_FORMAT_MONO8: case AL_FORMAT_STEREO8: case AL_FORMAT_QUAD8_LOKI: case AL_FORMAT_QUAD8: case AL_FORMAT_51CHN8: case AL_FORMAT_61CHN8: case AL_FORMAT_71CHN8: return 1; case AL_FORMAT_MONO16: case AL_FORMAT_STEREO16: case AL_FORMAT_QUAD16_LOKI: case AL_FORMAT_QUAD16: case AL_FORMAT_51CHN16: case AL_FORMAT_61CHN16: case AL_FORMAT_71CHN16: return 2; case AL_FORMAT_MONO_FLOAT32: case AL_FORMAT_STEREO_FLOAT32: case AL_FORMAT_QUAD32: case AL_FORMAT_51CHN32: case AL_FORMAT_61CHN32: case AL_FORMAT_71CHN32: return 4; case AL_FORMAT_MONO_DOUBLE_EXT: case AL_FORMAT_STEREO_DOUBLE_EXT: return 8; default: return 0; } } static __inline ALuint aluChannelsFromFormat(ALenum format) { switch(format) { case AL_FORMAT_MONO8: case AL_FORMAT_MONO16: case AL_FORMAT_MONO_FLOAT32: case AL_FORMAT_MONO_DOUBLE_EXT: return 1; case AL_FORMAT_STEREO8: case AL_FORMAT_STEREO16: case AL_FORMAT_STEREO_FLOAT32: case AL_FORMAT_STEREO_DOUBLE_EXT: return 2; case AL_FORMAT_QUAD8_LOKI: case AL_FORMAT_QUAD16_LOKI: case AL_FORMAT_QUAD8: case AL_FORMAT_QUAD16: case AL_FORMAT_QUAD32: return 4; case AL_FORMAT_51CHN8: case AL_FORMAT_51CHN16: case AL_FORMAT_51CHN32: return 6; case AL_FORMAT_61CHN8: case AL_FORMAT_61CHN16: case AL_FORMAT_61CHN32: return 7; case AL_FORMAT_71CHN8: case AL_FORMAT_71CHN16: case AL_FORMAT_71CHN32: return 8; default: return 0; } } static __inline ALint aluCart2LUTpos(ALfloat re, ALfloat im) { ALint pos = 0; ALfloat denom = aluFabs(re) + aluFabs(im); if(denom > 0.0f) pos = (ALint)(QUADRANT_NUM*aluFabs(im) / denom + 0.5); if(re < 0.0) pos = 2 * QUADRANT_NUM - pos; if(im < 0.0) pos = LUT_NUM - pos; return pos%LUT_NUM; } ALvoid aluInitPanning(ALCdevice *Device); ALvoid aluMixData(ALCdevice *device, ALvoid *buffer, ALsizei size); ALvoid aluHandleDisconnect(ALCdevice *device); #ifdef __cplusplus } #endif #endif