diff options
Diffstat (limited to 'Alc')
| -rw-r--r-- | Alc/effects/reverb.c | 64 |
1 files changed, 41 insertions, 23 deletions
diff --git a/Alc/effects/reverb.c b/Alc/effects/reverb.c index 9e8b8dd4..cfce5623 100644 --- a/Alc/effects/reverb.c +++ b/Alc/effects/reverb.c @@ -283,6 +283,15 @@ typedef struct ReverbState { ALfloat *SampleBuffer; ALuint TotalSamples; + struct { + /* Calculated parameters which indicate if cross-fading is needed after + * an update. + */ + ALfloat Density, Diffusion; + ALfloat DecayTime, HFDecayTime, LFDecayTime; + ALfloat HFReference, LFReference; + } Params; + /* Master effect filters */ struct { BiquadFilter Lp; @@ -340,6 +349,14 @@ static void ReverbState_Construct(ReverbState *state) state->TotalSamples = 0; state->SampleBuffer = NULL; + state->Params.Density = AL_EAXREVERB_DEFAULT_DENSITY; + state->Params.Diffusion = AL_EAXREVERB_DEFAULT_DIFFUSION; + state->Params.DecayTime = AL_EAXREVERB_DEFAULT_DECAY_TIME; + state->Params.HFDecayTime = AL_EAXREVERB_DEFAULT_DECAY_TIME*AL_EAXREVERB_DEFAULT_DECAY_HFRATIO; + state->Params.LFDecayTime = AL_EAXREVERB_DEFAULT_DECAY_TIME*AL_EAXREVERB_DEFAULT_DECAY_LFRATIO; + state->Params.HFReference = AL_EAXREVERB_DEFAULT_HFREFERENCE; + state->Params.LFReference = AL_EAXREVERB_DEFAULT_LFREFERENCE; + for(i = 0;i < NUM_LINES;i++) { BiquadFilter_clear(&state->Filter[i].Lp); @@ -929,7 +946,7 @@ static ALvoid Update3DPanning(const ALCdevice *Device, const ALfloat *Reflection #undef MATRIX_MULT } -static ALvoid ReverbState_update(ReverbState *State, const ALCcontext *Context, const ALeffectslot *Slot, const ALeffectProps *props) +static void ReverbState_update(ReverbState *State, const ALCcontext *Context, const ALeffectslot *Slot, const ALeffectProps *props) { const ALCdevice *Device = Context->Device; const ALlistener *Listener = Context->Listener; @@ -1001,30 +1018,31 @@ static ALvoid ReverbState_update(ReverbState *State, const ALCcontext *Context, mini(State->Early.Offset[0][1], State->Late.Offset[0][1]) ); - /* Determine if delay-line cross-fading is required. TODO: Add some fuzz - * for the float comparisons? The math should be stable enough that the - * result should be the same if nothing's changed, and changes in the float - * values should (though may not always) be matched by changes in delay - * offsets. + /* Determine if delay-line cross-fading is required. Density is essentially + * a master control for the feedback delays, so changes the offsets of many + * delay lines. */ - if(State->Late.DensityGain[1] != State->Late.DensityGain[0]) + if(State->Params.Density != props->Reverb.Density || + /* Diffusion and decay times influences the decay rate (gain) of the + * late reverb T60 filter. + */ + State->Params.Diffusion != props->Reverb.Diffusion || + State->Params.DecayTime != props->Reverb.DecayTime || + State->Params.HFDecayTime != hfDecayTime || + State->Params.LFDecayTime != lfDecayTime || + /* HF/LF References control the weighting used to calculate the density + * gain. + */ + State->Params.HFReference != props->Reverb.HFReference || + State->Params.LFReference != props->Reverb.LFReference) State->FadeCount = 0; - else for(i = 0;i < NUM_LINES;i++) - { - if(State->EarlyDelayTap[i][1] != State->EarlyDelayTap[i][0] || - State->EarlyDelayCoeff[i][1] != State->EarlyDelayCoeff[i][0] || - State->Early.VecAp.Offset[i][1] != State->Early.VecAp.Offset[i][0] || - State->Early.Offset[i][1] != State->Early.Offset[i][0] || - State->Early.Coeff[i][1] != State->Early.Coeff[i][0] || - State->LateDelayTap[i][1] != State->LateDelayTap[i][0] || - State->Late.VecAp.Offset[i][1] != State->Late.VecAp.Offset[i][0] || - State->Late.Offset[i][1] != State->Late.Offset[i][0] || - State->Late.T60[i].MidGain[1] != State->Late.T60[i].MidGain[0]) - { - State->FadeCount = 0; - break; - } - } + State->Params.Density = props->Reverb.Density; + State->Params.Diffusion = props->Reverb.Diffusion; + State->Params.DecayTime = props->Reverb.DecayTime; + State->Params.HFDecayTime = hfDecayTime; + State->Params.LFDecayTime = lfDecayTime; + State->Params.HFReference = props->Reverb.HFReference; + State->Params.LFReference = props->Reverb.LFReference; } |