diff options
Diffstat (limited to 'Alc')
| -rw-r--r-- | Alc/ALu.c | 47 |
1 files changed, 44 insertions, 3 deletions
@@ -150,10 +150,35 @@ static __inline ALvoid aluMatrixVector(ALfloat *vector,ALfloat matrix[3][3]) memcpy(vector, result, sizeof(result)); } +static __inline ALfloat aluComputeDrySample(ALsource *source, ALfloat DryGainHF, ALfloat sample) +{ + if(DryGainHF < 1.0f) + { + sample *= DryGainHF; + sample += source->LastDrySample * (1.0f - DryGainHF); + } + + source->LastDrySample = sample; + return sample; +} + +static __inline ALfloat aluComputeWetSample(ALsource *source, ALfloat WetGainHF, ALfloat sample) +{ + if(WetGainHF < 1.0f) + { + sample *= WetGainHF; + sample += source->LastWetSample * (1.0f - WetGainHF); + } + + source->LastWetSample = sample; + return sample; +} + static ALvoid CalcSourceParams(ALCcontext *ALContext, ALsource *ALSource, ALenum isMono, ALenum OutputFormat, ALfloat *drysend, ALfloat *wetsend, - ALfloat *pitch) + ALfloat *pitch, ALfloat *drygainhf, + ALfloat *wetgainhf) { ALfloat ListenerOrientation[6],ListenerPosition[3],ListenerVelocity[3]; ALfloat InnerAngle,OuterAngle,OuterGain,Angle,Distance,DryMix,WetMix; @@ -168,6 +193,7 @@ static ALvoid CalcSourceParams(ALCcontext *ALContext, ALsource *ALSource, ALint HeadRelative; ALfloat flAttenuation; ALfloat MetersPerUnit; + ALfloat DryGainHF, WetGainHF; //Get context properties DopplerFactor = ALContext->DopplerFactor; @@ -272,6 +298,8 @@ static ALvoid CalcSourceParams(ALCcontext *ALContext, ALsource *ALSource, WetMix = __min(WetMix,MaxVolume); WetMix = __max(WetMix,MinVolume); //3. Apply directional soundcones + DryGainHF = 1.0f; + WetGainHF = 1.0f; SourceToListener[0] = -Position[0]; SourceToListener[1] = -Position[1]; SourceToListener[2] = -Position[2]; @@ -334,6 +362,9 @@ static ALvoid CalcSourceParams(ALCcontext *ALContext, ALsource *ALSource, PanningFB = 0.5f; } + *drygainhf = DryGainHF; + *wetgainhf = WetGainHF; + //7. Convert pannings into channel volumes switch(OutputFormat) { @@ -379,6 +410,9 @@ static ALvoid CalcSourceParams(ALCcontext *ALContext, ALsource *ALSource, wetsend[3] = SourceVolume * 0.0f * ListenerGain; pitch[0] = Pitch; + + *drygainhf = 1.0; + *wetgainhf = 1.0; } } @@ -388,6 +422,8 @@ ALvoid aluMixData(ALCcontext *ALContext,ALvoid *buffer,ALsizei size,ALenum forma static float WetBuffer[BUFFERSIZE][OUTPUTCHANNELS]; ALfloat DrySend[OUTPUTCHANNELS] = { 0.0f, 0.0f, 0.0f, 0.0f }; ALfloat WetSend[OUTPUTCHANNELS] = { 0.0f, 0.0f, 0.0f, 0.0f }; + ALfloat DryGainHF = 0.0f; + ALfloat WetGainHF = 0.0f; ALuint BlockAlign,BufferSize; ALuint DataSize=0,DataPosInt=0,DataPosFrac=0; ALuint Channels,Bits,Frequency,ulExtraSamples; @@ -447,7 +483,8 @@ ALvoid aluMixData(ALCcontext *ALContext,ALvoid *buffer,ALsizei size,ALenum forma CalcSourceParams(ALContext, ALSource, (Channels==1) ? AL_TRUE : AL_FALSE, - format, DrySend, WetSend, &Pitch); + format, DrySend, WetSend, &Pitch, + &DryGainHF, &WetGainHF); Pitch = (Pitch*Frequency) / ALContext->Frequency; @@ -510,13 +547,17 @@ ALvoid aluMixData(ALCcontext *ALContext,ALvoid *buffer,ALsizei size,ALenum forma if(Channels==1) { //First order interpolator - value = (ALfloat)((ALshort)(((Data[k]*((1L<<FRACTIONBITS)-fraction))+(Data[k+1]*(fraction)))>>FRACTIONBITS)); + ALfloat sample = (ALfloat)((ALshort)(((Data[k]*((1L<<FRACTIONBITS)-fraction))+(Data[k+1]*(fraction)))>>FRACTIONBITS)); + //Direct path final mix buffer and panning + value = aluComputeDrySample(ALSource, DryGainHF, sample); DryBuffer[j][0] += value*DrySend[0]; DryBuffer[j][1] += value*DrySend[1]; DryBuffer[j][2] += value*DrySend[2]; DryBuffer[j][3] += value*DrySend[3]; + //Room path final mix buffer and panning + value = aluComputeWetSample(ALSource, WetGainHF, sample); WetBuffer[j][0] += value*WetSend[0]; WetBuffer[j][1] += value*WetSend[1]; WetBuffer[j][2] += value*WetSend[2]; |