diff options
Diffstat (limited to 'Alc')
| -rw-r--r-- | Alc/alcReverb.c | 26 |
1 files changed, 22 insertions, 4 deletions
diff --git a/Alc/alcReverb.c b/Alc/alcReverb.c index 24d1eb39..1d89e04d 100644 --- a/Alc/alcReverb.c +++ b/Alc/alcReverb.c @@ -539,11 +539,29 @@ ALvoid VerbUpdate(ALeffectState *effect, ALCcontext *Context, ALeffect *Effect) // Calculate the 3D-panning gains for the early reflections and late // reverb (for EAX mode). { - ALfloat *earlyPan = Effect->Reverb.ReflectionsPan; - ALfloat *latePan = Effect->Reverb.LateReverbPan; + ALfloat earlyPan[3] = { Effect->Reverb.ReflectionsPan[0], Effect->Reverb.ReflectionsPan[1], Effect->Reverb.ReflectionsPan[2] }; + ALfloat latePan[3] = { Effect->Reverb.LateReverbPan[0], Effect->Reverb.LateReverbPan[1], Effect->Reverb.LateReverbPan[2] }; ALfloat *speakerGain, dirGain, ambientGain; + ALfloat length; ALint pos; + length = earlyPan[0]*earlyPan[0] + earlyPan[1]*earlyPan[1] + earlyPan[2]*earlyPan[2]; + if(length > 1.0f) + { + length = 1.0f / aluSqrt(length); + earlyPan[0] *= length; + earlyPan[1] *= length; + earlyPan[2] *= length; + } + length = latePan[0]*latePan[0] + latePan[1]*latePan[1] + latePan[2]*latePan[2]; + if(length > 1.0f) + { + length = 1.0f / aluSqrt(length); + latePan[0] *= length; + latePan[1] *= length; + latePan[2] *= length; + } + // This code applies directional reverb just like the mixer applies // directional sources. It diffuses the sound toward all speakers // as the magnitude of the panning vector drops, which is only an @@ -552,14 +570,14 @@ ALvoid VerbUpdate(ALeffectState *effect, ALCcontext *Context, ALeffect *Effect) pos = aluCart2LUTpos(earlyPan[2], earlyPan[0]); speakerGain = &Context->PanningLUT[OUTPUTCHANNELS * pos]; dirGain = aluSqrt((earlyPan[0] * earlyPan[0]) + (earlyPan[2] * earlyPan[2])); - ambientGain = 1.0 / aluSqrt(Context->NumChan) * (1.0 - dirGain); + ambientGain = (1.0 - dirGain); for(index = 0;index < OUTPUTCHANNELS;index++) State->Early.PanGain[index] = dirGain * speakerGain[index] + ambientGain; pos = aluCart2LUTpos(latePan[2], latePan[0]); speakerGain = &Context->PanningLUT[OUTPUTCHANNELS * pos]; dirGain = aluSqrt((latePan[0] * latePan[0]) + (latePan[2] * latePan[2])); - ambientGain = 1.0 / aluSqrt(Context->NumChan) * (1.0 - dirGain); + ambientGain = (1.0 - dirGain); for(index = 0;index < OUTPUTCHANNELS;index++) State->Late.PanGain[index] = dirGain * speakerGain[index] + ambientGain; } |