diff options
Diffstat (limited to 'Alc/effects/reverb.c')
| -rw-r--r-- | Alc/effects/reverb.c | 38 |
1 files changed, 20 insertions, 18 deletions
diff --git a/Alc/effects/reverb.c b/Alc/effects/reverb.c index f0c0bea6..d30fceb0 100644 --- a/Alc/effects/reverb.c +++ b/Alc/effects/reverb.c @@ -220,11 +220,11 @@ static const ALfloat LATE_LINE_LENGTHS[4] = }; /* This coefficient is used to define the delay scale from the sinus, according - * to the modulation depth property. This value must be below half the shortest - * late line length (0.0097/2 = ~0.0048), otherwise with certain parameters - * (high mod time, low density) the downswing can sample before the input. + * to the modulation depth property. This value must be below the shortest late + * line length (0.0097), otherwise with certain parameters (high mod time, low + * density) the downswing can sample before the input. */ -static const ALfloat MODULATION_DEPTH_COEFF = 1.0f / 4096.0f; +static const ALfloat MODULATION_DEPTH_COEFF = 0.0032f; /* A filter is used to avoid the terrible distortion caused by changing * modulation time and/or depth. To be consistent across different sample @@ -1055,22 +1055,21 @@ static ALvoid UpdateModulator(const ALfloat modTime, const ALfloat modDepth, * (1 sample) and when the timing changes, the index is rescaled to the new * range to keep the sinus consistent. */ - range = maxi(fastf2i(modTime*frequency), 1); + range = fastf2i(modTime*frequency + 0.5f); State->Mod.Index = (ALsizei)(State->Mod.Index * (ALint64)range / State->Mod.Range) % range; State->Mod.Range = range; State->Mod.Scale = F_TAU / range; - /* The modulation depth effects the scale of the sinus, which changes how - * much extra delay is added to the delay line. This delay changing over - * time changes the pitch, creating the modulation effect. The scale needs - * to be multiplied by the modulation time so that a given depth produces a - * consistent shift in frequency over all ranges of time. Since the depth - * is applied to a sinus value, it needs to be halved for the sinus swing - * in time (half of it is spent decreasing the frequency, half is spent - * increasing it). + /* The modulation depth effects the scale of the sinus, which varies the + * delay for the tapped output. This delay changing over time changes the + * pitch, creating the modulation effect. The scale needs to be multiplied + * by the modulation time (itself scaled by the max modulation time) so + * that a given depth produces a consistent shift in frequency over all + * ranges of time. */ - State->Mod.Depth = modDepth * MODULATION_DEPTH_COEFF * modTime / 2.0f * + State->Mod.Depth = modDepth * MODULATION_DEPTH_COEFF * + (modTime / AL_EAXREVERB_MAX_MODULATION_TIME) * frequency; } @@ -1706,20 +1705,23 @@ static ALvoid LateReverb_##T(ALreverbState *State, const ALsizei todo, \ \ delay = offset - moddelay[i]; \ for(j = 0;j < 4;j++) \ - f[j] += DELAY_OUT_##T(&State->Late.Delay, \ + out[j][i] = f[j] + DELAY_OUT_##T(&State->Late.Delay, \ delay-State->Late.Offset[j][0], \ delay-State->Late.Offset[j][1], j, fade \ ); \ \ for(j = 0;j < 4;j++) \ + f[j] += DELAY_OUT_##T(&State->Late.Delay, \ + offset-State->Late.Offset[j][0], \ + offset-State->Late.Offset[j][1], j, fade \ + ); \ + \ + for(j = 0;j < 4;j++) \ f[j] = LateT60Filter(j, f[j], State); \ \ VectorAllpass_##T(f, offset, apFeedCoeff, mixX, mixY, fade, \ &State->Late.VecAp); \ \ - for(j = 0;j < 4;j++) \ - out[j][i] = f[j]; \ - \ VectorReverse(f); \ \ VectorPartialScatter(f, mixX, mixY); \ |