diff options
Diffstat (limited to 'Alc/effects/reverb.c')
| -rw-r--r-- | Alc/effects/reverb.c | 53 |
1 files changed, 29 insertions, 24 deletions
diff --git a/Alc/effects/reverb.c b/Alc/effects/reverb.c index a0f800bb..8408dc3d 100644 --- a/Alc/effects/reverb.c +++ b/Alc/effects/reverb.c @@ -152,8 +152,8 @@ typedef struct ALreverbState { ALfloat LpCoeff; ALfloat LpSample; - // Echo mixing coefficients. - ALfloat MixCoeff[2]; + // Echo mixing coefficient. + ALfloat MixCoeff; } Echo; // The current read offset for all delay lines. @@ -464,11 +464,11 @@ static inline ALvoid EAXEcho(ALreverbState *State, ALuint todo, ALfloat (*restri State->Echo.Coeff; // Mix the output into the late reverb channels. - out = State->Echo.MixCoeff[0] * feed; - late[i][0] = (State->Echo.MixCoeff[1] * late[i][0]) + out; - late[i][1] = (State->Echo.MixCoeff[1] * late[i][1]) + out; - late[i][2] = (State->Echo.MixCoeff[1] * late[i][2]) + out; - late[i][3] = (State->Echo.MixCoeff[1] * late[i][3]) + out; + out = State->Echo.MixCoeff * feed; + late[i][0] += out; + late[i][1] += out; + late[i][2] += out; + late[i][3] += out; // Mix the energy-attenuated input with the output and pass it through // the echo low-pass filter. @@ -962,7 +962,7 @@ static ALvoid UpdateDecorrelator(ALfloat density, ALuint frequency, ALreverbStat } // Update the late reverb gains, line lengths, and line coefficients. -static ALvoid UpdateLateLines(ALfloat reverbGain, ALfloat lateGain, ALfloat xMix, ALfloat density, ALfloat decayTime, ALfloat diffusion, ALfloat hfRatio, ALfloat cw, ALuint frequency, ALreverbState *State) +static ALvoid UpdateLateLines(ALfloat reverbGain, ALfloat lateGain, ALfloat xMix, ALfloat density, ALfloat decayTime, ALfloat diffusion, ALfloat echoDepth, ALfloat hfRatio, ALfloat cw, ALuint frequency, ALreverbState *State) { ALfloat length; ALuint index; @@ -970,9 +970,13 @@ static ALvoid UpdateLateLines(ALfloat reverbGain, ALfloat lateGain, ALfloat xMix /* Calculate the late reverb gain (from the master effect gain, and late * reverb gain parameters). Since the output is tapped prior to the * application of the next delay line coefficients, this gain needs to be - * attenuated by the 'x' mixing matrix coefficient as well. + * attenuated by the 'x' mixing matrix coefficient as well. Also attenuate + * the late reverb when echo depth is high and diffusion is low, so the + * echo is slightly stronger than the decorrelated echos in the reverb + * tail. */ - State->Late.Gain = reverbGain * lateGain * xMix; + State->Late.Gain = reverbGain * lateGain * xMix * + (1.0f - (echoDepth*0.5f*(1.0f - diffusion))); /* To compensate for changes in modal density and decay time of the late * reverb signal, the input is attenuated based on the maximal energy of @@ -985,8 +989,9 @@ static ALvoid UpdateLateLines(ALfloat reverbGain, ALfloat lateGain, ALfloat xMix length = (LATE_LINE_LENGTH[0] + LATE_LINE_LENGTH[1] + LATE_LINE_LENGTH[2] + LATE_LINE_LENGTH[3]) / 4.0f; length *= 1.0f + (density * LATE_LINE_MULTIPLIER); - State->Late.DensityGain = CalcDensityGain(CalcDecayCoeff(length, - decayTime)); + State->Late.DensityGain = CalcDensityGain( + CalcDecayCoeff(length, decayTime) + ); // Calculate the all-pass feed-back and feed-forward coefficient. State->Late.ApFeedCoeff = 0.5f * powf(diffusion, 2.0f); @@ -994,12 +999,13 @@ static ALvoid UpdateLateLines(ALfloat reverbGain, ALfloat lateGain, ALfloat xMix for(index = 0;index < 4;index++) { // Calculate the gain (coefficient) for each all-pass line. - State->Late.ApCoeff[index] = CalcDecayCoeff(ALLPASS_LINE_LENGTH[index], - decayTime); + State->Late.ApCoeff[index] = CalcDecayCoeff( + ALLPASS_LINE_LENGTH[index], decayTime + ); // Calculate the length (in seconds) of each cyclical delay line. - length = LATE_LINE_LENGTH[index] * (1.0f + (density * - LATE_LINE_MULTIPLIER)); + length = LATE_LINE_LENGTH[index] * + (1.0f + (density * LATE_LINE_MULTIPLIER)); // Calculate the delay offset for each cyclical delay line. State->Late.Offset[index] = fastf2u(length * frequency); @@ -1008,9 +1014,9 @@ static ALvoid UpdateLateLines(ALfloat reverbGain, ALfloat lateGain, ALfloat xMix State->Late.Coeff[index] = CalcDecayCoeff(length, decayTime); // Calculate the damping coefficient for each low-pass filter. - State->Late.LpCoeff[index] = - CalcDampingCoeff(hfRatio, length, decayTime, - State->Late.Coeff[index], cw); + State->Late.LpCoeff[index] = CalcDampingCoeff( + hfRatio, length, decayTime, State->Late.Coeff[index], cw + ); // Attenuate the cyclical line coefficients by the mixing coefficient // (x). @@ -1047,8 +1053,7 @@ static ALvoid UpdateEchoLine(ALfloat reverbGain, ALfloat lateGain, ALfloat echoT * echo depth is high and diffusion is low, so the echo is slightly * stronger than the decorrelated echos in the reverb tail. */ - State->Echo.MixCoeff[0] = reverbGain * lateGain * echoDepth; - State->Echo.MixCoeff[1] = 1.0f - (echoDepth * 0.5f * (1.0f - diffusion)); + State->Echo.MixCoeff = reverbGain * lateGain * echoDepth; } // Update the early and late 3D panning gains. @@ -1156,7 +1161,8 @@ static ALvoid ALreverbState_update(ALreverbState *State, ALCdevice *Device, cons // Update the late lines. UpdateLateLines(props->Reverb.Gain, props->Reverb.LateReverbGain, x, props->Reverb.Density, props->Reverb.DecayTime, - props->Reverb.Diffusion, hfRatio, cw, frequency, State); + props->Reverb.Diffusion, props->Reverb.EchoDepth, + hfRatio, cw, frequency, State); // Update the echo line. UpdateEchoLine(props->Reverb.Gain, props->Reverb.LateReverbGain, @@ -1267,8 +1273,7 @@ static ALeffectState *ALreverbStateFactory_create(ALreverbStateFactory* UNUSED(f state->Echo.ApOffset = 0; state->Echo.LpCoeff = 0.0f; state->Echo.LpSample = 0.0f; - state->Echo.MixCoeff[0] = 0.0f; - state->Echo.MixCoeff[1] = 0.0f; + state->Echo.MixCoeff = 0.0f; state->Offset = 0; |