diff options
Diffstat (limited to 'OpenAL32/Include/alu.h')
| -rw-r--r-- | OpenAL32/Include/alu.h | 76 |
1 files changed, 53 insertions, 23 deletions
diff --git a/OpenAL32/Include/alu.h b/OpenAL32/Include/alu.h index 01d3ca29..d88e860c 100644 --- a/OpenAL32/Include/alu.h +++ b/OpenAL32/Include/alu.h @@ -13,13 +13,17 @@ #endif -#define F_PI (3.14159265358979323846f) /* pi */ -#define F_PI_2 (1.57079632679489661923f) /* pi/2 */ +#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)) + #ifdef __cplusplus extern "C" { @@ -31,18 +35,20 @@ struct DirectParams; struct SendParams; typedef void (*ResamplerFunc)(const ALfloat *src, ALuint frac, ALuint increment, - ALfloat *RESTRICT dst, ALuint dstlen); + ALfloat *restrict dst, ALuint dstlen); typedef ALvoid (*DryMixerFunc)(const struct DirectParams *params, - const ALfloat *RESTRICT data, ALuint srcchan, + const ALfloat *restrict data, ALuint srcchan, ALuint OutPos, ALuint SamplesToDo, ALuint BufferSize); typedef ALvoid (*WetMixerFunc)(const struct SendParams *params, - const ALfloat *RESTRICT data, + const ALfloat *restrict data, ALuint OutPos, ALuint SamplesToDo, ALuint BufferSize); +#define GAIN_SILENCE_THRESHOLD (0.00001f) + #define SPEEDOFSOUNDMETRESPERSEC (343.3f) #define AIRABSORBGAINHF (0.99426f) /* -0.05dB */ @@ -51,47 +57,54 @@ typedef ALvoid (*WetMixerFunc)(const struct SendParams *params, #define FRACTIONMASK (FRACTIONONE-1) -static __inline ALfloat minf(ALfloat a, ALfloat b) +inline ALfloat minf(ALfloat a, ALfloat b) { return ((a > b) ? b : a); } -static __inline ALfloat maxf(ALfloat a, ALfloat b) +inline ALfloat maxf(ALfloat a, ALfloat b) { return ((a > b) ? a : b); } -static __inline ALfloat clampf(ALfloat val, ALfloat min, ALfloat max) +inline ALfloat clampf(ALfloat val, ALfloat min, ALfloat max) { return minf(max, maxf(min, val)); } -static __inline ALuint minu(ALuint a, ALuint b) +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); } -static __inline ALuint maxu(ALuint a, ALuint b) +inline ALuint maxu(ALuint a, ALuint b) { return ((a > b) ? a : b); } -static __inline ALuint clampu(ALuint val, ALuint min, ALuint max) +inline ALuint clampu(ALuint val, ALuint min, ALuint max) { return minu(max, maxu(min, val)); } -static __inline ALint mini(ALint a, ALint b) +inline ALint mini(ALint a, ALint b) { return ((a > b) ? b : a); } -static __inline ALint maxi(ALint a, ALint b) +inline ALint maxi(ALint a, ALint b) { return ((a > b) ? a : b); } -static __inline ALint clampi(ALint val, ALint min, ALint max) +inline ALint clampi(ALint val, ALint min, ALint max) { return mini(max, maxi(min, val)); } -static __inline ALint64 mini64(ALint64 a, ALint64 b) +inline ALint64 mini64(ALint64 a, ALint64 b) { return ((a > b) ? b : a); } -static __inline ALint64 maxi64(ALint64 a, ALint64 b) +inline ALint64 maxi64(ALint64 a, ALint64 b) { return ((a > b) ? a : b); } -static __inline ALint64 clampi64(ALint64 val, ALint64 min, ALint64 max) +inline ALint64 clampi64(ALint64 val, ALint64 min, ALint64 max) { return mini64(max, maxi64(min, val)); } -static __inline ALuint64 minu64(ALuint64 a, ALuint64 b) +inline ALuint64 minu64(ALuint64 a, ALuint64 b) { return ((a > b) ? b : a); } -static __inline ALuint64 maxu64(ALuint64 a, ALuint64 b) +inline ALuint64 maxu64(ALuint64 a, ALuint64 b) { return ((a > b) ? a : b); } -static __inline ALuint64 clampu64(ALuint64 val, ALuint64 min, ALuint64 max) +inline ALuint64 clampu64(ALuint64 val, ALuint64 min, ALuint64 max) { return minu64(max, maxu64(min, val)); } -static __inline ALfloat lerp(ALfloat val1, ALfloat val2, ALfloat mu) +inline ALfloat lerp(ALfloat val1, ALfloat val2, ALfloat mu) { return val1 + (val2-val1)*mu; } -static __inline ALfloat cubic(ALfloat val0, ALfloat val1, ALfloat val2, ALfloat val3, ALfloat 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; @@ -105,7 +118,24 @@ static __inline ALfloat cubic(ALfloat val0, ALfloat val1, ALfloat val2, ALfloat ALvoid aluInitPanning(ALCdevice *Device); -ALvoid ComputeAngleGains(const ALCdevice *device, ALfloat angle, ALfloat hwidth, ALfloat ingain, ALfloat *gains); +/** + * ComputeAngleGains + * + * Sets channel gains based on a given source's angle and its half-width. The + * angle and hwidth parameters are in radians. + */ +void ComputeAngleGains(const ALCdevice *device, ALfloat angle, ALfloat hwidth, ALfloat ingain, ALfloat gains[MaxChannels]); + +/** + * SetGains + * + * Helper to set the appropriate channels to the specified gain. + */ +inline void SetGains(const ALCdevice *device, ALfloat ingain, ALfloat gains[MaxChannels]) +{ + ComputeAngleGains(device, 0.0f, F_PI, ingain, gains); +} + ALvoid CalcSourceParams(struct ALsource *ALSource, const ALCcontext *ALContext); ALvoid CalcNonAttnSourceParams(struct ALsource *ALSource, const ALCcontext *ALContext); |