#ifndef _ALU_H_ #define _ALU_H_ #include #include #ifdef HAVE_FLOAT_H #include #endif #ifdef HAVE_IEEEFP_H #include #endif #include "alMain.h" #include "alBuffer.h" #include "alFilter.h" #include "hrtf.h" #include "align.h" #define F_PI (3.14159265358979323846f) #define F_PI_2 (1.57079632679489661923f) #define F_2PI (6.28318530717958647692f) #ifndef FLT_EPSILON #define FLT_EPSILON (1.19209290e-07f) #endif #define DEG2RAD(x) ((ALfloat)(x) * (F_PI/180.0f)) #define RAD2DEG(x) ((ALfloat)(x) * (180.0f/F_PI)) #define MAX_PITCH (10) #ifdef __cplusplus extern "C" { #endif struct ALsource; struct ALvoice; enum ActiveFilters { AF_None = 0, AF_LowPass = 1, AF_HighPass = 2, AF_BandPass = AF_LowPass | AF_HighPass }; typedef struct MixGains { ALfloat Current; ALfloat Step; ALfloat Target; } MixGains; typedef struct DirectParams { ALfloat (*OutBuffer)[BUFFERSIZE]; ALuint OutChannels; /* If not 'moving', gain/coefficients are set directly without fading. */ ALboolean Moving; /* Stepping counter for gain/coefficient fading. */ ALuint Counter; /* Last direction (relative to listener) and gain of a moving source. */ ALfloat LastDir[3]; ALfloat LastGain; struct { enum ActiveFilters ActiveType; ALfilterState LowPass; ALfilterState HighPass; } Filters[MAX_INPUT_CHANNELS]; struct { HrtfParams Params[MAX_INPUT_CHANNELS]; HrtfState State[MAX_INPUT_CHANNELS]; ALuint IrSize; } Hrtf; MixGains Gains[MAX_INPUT_CHANNELS][MAX_OUTPUT_CHANNELS]; } DirectParams; typedef struct SendParams { ALfloat (*OutBuffer)[BUFFERSIZE]; ALboolean Moving; ALuint Counter; struct { enum ActiveFilters ActiveType; ALfilterState LowPass; ALfilterState HighPass; } Filters[MAX_INPUT_CHANNELS]; /* Gain control, which applies to all input channels to a single (mono) * output buffer. */ MixGains Gain; } SendParams; typedef const ALfloat* (*ResamplerFunc)(const ALfloat *src, ALuint frac, ALuint increment, ALfloat *restrict dst, ALuint dstlen); typedef void (*MixerFunc)(const ALfloat *data, ALuint OutChans, ALfloat (*restrict OutBuffer)[BUFFERSIZE], struct MixGains *Gains, ALuint Counter, ALuint OutPos, ALuint BufferSize); typedef void (*HrtfMixerFunc)(ALfloat (*restrict OutBuffer)[BUFFERSIZE], const ALfloat *data, ALuint Counter, ALuint Offset, ALuint OutPos, const ALuint IrSize, const HrtfParams *hrtfparams, HrtfState *hrtfstate, ALuint BufferSize); #define GAIN_SILENCE_THRESHOLD (0.00001f) /* -100dB */ #define SPEEDOFSOUNDMETRESPERSEC (343.3f) #define AIRABSORBGAINHF (0.99426f) /* -0.05dB */ #define FRACTIONBITS (14) #define FRACTIONONE (1< b) ? b : a); } inline ALfloat maxf(ALfloat a, ALfloat b) { return ((a > b) ? a : b); } inline ALfloat clampf(ALfloat val, ALfloat min, ALfloat max) { return minf(max, maxf(min, val)); } inline ALdouble mind(ALdouble a, ALdouble b) { return ((a > b) ? b : a); } inline ALdouble maxd(ALdouble a, ALdouble b) { return ((a > b) ? a : b); } inline ALdouble clampd(ALdouble val, ALdouble min, ALdouble max) { return mind(max, maxd(min, val)); } inline ALuint minu(ALuint a, ALuint b) { return ((a > b) ? b : a); } inline ALuint maxu(ALuint a, ALuint b) { return ((a > b) ? a : b); } inline ALuint clampu(ALuint val, ALuint min, ALuint max) { return minu(max, maxu(min, val)); } inline ALint mini(ALint a, ALint b) { return ((a > b) ? b : a); } inline ALint maxi(ALint a, ALint b) { return ((a > b) ? a : b); } inline ALint clampi(ALint val, ALint min, ALint max) { return mini(max, maxi(min, val)); } inline ALint64 mini64(ALint64 a, ALint64 b) { return ((a > b) ? b : a); } inline ALint64 maxi64(ALint64 a, ALint64 b) { return ((a > b) ? a : b); } inline ALint64 clampi64(ALint64 val, ALint64 min, ALint64 max) { return mini64(max, maxi64(min, val)); } inline ALuint64 minu64(ALuint64 a, ALuint64 b) { return ((a > b) ? b : a); } inline ALuint64 maxu64(ALuint64 a, ALuint64 b) { return ((a > b) ? a : b); } inline ALuint64 clampu64(ALuint64 val, ALuint64 min, ALuint64 max) { return minu64(max, maxu64(min, val)); } inline ALfloat lerp(ALfloat val1, ALfloat val2, ALfloat mu) { return val1 + (val2-val1)*mu; } inline ALfloat cubic(ALfloat val0, ALfloat val1, ALfloat val2, ALfloat val3, ALfloat mu) { ALfloat mu2 = mu*mu; ALfloat a0 = -0.5f*val0 + 1.5f*val1 + -1.5f*val2 + 0.5f*val3; ALfloat a1 = val0 + -2.5f*val1 + 2.0f*val2 + -0.5f*val3; ALfloat a2 = -0.5f*val0 + 0.5f*val2; ALfloat a3 = val1; return a0*mu*mu2 + a1*mu2 + a2*mu + a3; } ALvoid aluInitPanning(ALCdevice *Device); /** * ComputeDirectionalGains * * Sets channel gains based on a direction. The direction must be a 3-component * vector no longer than 1 unit. */ void ComputeDirectionalGains(const ALCdevice *device, const ALfloat dir[3], ALfloat ingain, ALfloat gains[MAX_OUTPUT_CHANNELS]); /** * ComputeAngleGains * * Sets channel gains based on angle and elevation. The angle and elevation * parameters are in radians, going right and up respectively. */ void ComputeAngleGains(const ALCdevice *device, ALfloat angle, ALfloat elevation, ALfloat ingain, ALfloat gains[MAX_OUTPUT_CHANNELS]); /** * ComputeAmbientGains * * Sets channel gains for ambient, omni-directional sounds. */ void ComputeAmbientGains(const ALCdevice *device, ALfloat ingain, ALfloat gains[MAX_OUTPUT_CHANNELS]); /** * ComputeBFormatGains * * Sets channel gains for a given (first-order) B-Format channel. The matrix is * a 1x4 'slice' of the rotation matrix for a given channel used to orient the * coefficients. */ void ComputeBFormatGains(const ALCdevice *device, const ALfloat mtx[4], ALfloat ingain, ALfloat gains[MAX_OUTPUT_CHANNELS]); ALvoid CalcSourceParams(struct ALvoice *voice, const struct ALsource *source, const ALCcontext *ALContext); ALvoid CalcNonAttnSourceParams(struct ALvoice *voice, const struct ALsource *source, const ALCcontext *ALContext); ALvoid MixSource(struct ALvoice *voice, struct ALsource *source, ALCdevice *Device, ALuint SamplesToDo); ALvoid aluMixData(ALCdevice *device, ALvoid *buffer, ALsizei size); /* Caller must lock the device. */ ALvoid aluHandleDisconnect(ALCdevice *device); extern ALfloat ConeScale; extern ALfloat ZScale; #ifdef __cplusplus } #endif #endif