diff options
Diffstat (limited to 'Alc/effects/reverb.c')
| -rw-r--r-- | Alc/effects/reverb.c | 60 |
1 files changed, 27 insertions, 33 deletions
diff --git a/Alc/effects/reverb.c b/Alc/effects/reverb.c index 01f4caf3..7f4139c6 100644 --- a/Alc/effects/reverb.c +++ b/Alc/effects/reverb.c @@ -88,8 +88,7 @@ typedef struct ALreverbState { DelayLine Delay[4]; ALuint Offset[4]; - // The gain for each output channel based on 3D panning (only for the - // EAX path). + // The gain for each output channel based on 3D panning. ALfloat PanGain[4][MAX_OUTPUT_CHANNELS]; } Early; @@ -127,8 +126,7 @@ typedef struct ALreverbState { ALfloat LpCoeff[4]; ALfloat LpSample[4]; - // The gain for each output channel based on 3D panning (only for the - // EAX path). + // The gain for each output channel based on 3D panning. ALfloat PanGain[4][MAX_OUTPUT_CHANNELS]; } Late; @@ -159,10 +157,6 @@ typedef struct ALreverbState { // The current read offset for all delay lines. ALuint Offset; - // The gain for each output channel (non-EAX path only; aliased from - // Late.PanGain) - ALfloat (*Gain)[MAX_OUTPUT_CHANNELS]; - /* Temporary storage used when processing. */ ALfloat ReverbSamples[MAX_UPDATE_SAMPLES][4]; ALfloat EarlySamples[MAX_UPDATE_SAMPLES][4]; @@ -434,10 +428,10 @@ static inline ALvoid LateReverb(ALreverbState *State, ALuint todo, ALfloat (*res // Output the results of the matrix for all four channels, attenuated by // the late reverb gain (which is attenuated by the 'x' mix coefficient). // Mix early reflections and late reverb. - out[i][0] += State->Late.Gain * f[0]; - out[i][1] += State->Late.Gain * f[1]; - out[i][2] += State->Late.Gain * f[2]; - out[i][3] += State->Late.Gain * f[3]; + out[i][0] = State->Late.Gain * f[0]; + out[i][1] = State->Late.Gain * f[1]; + out[i][2] = State->Late.Gain * f[2]; + out[i][3] = State->Late.Gain * f[3]; // Re-feed the cyclical delay lines. DelayLineIn(&State->Late.Delay[0], offset, f[0]); @@ -488,7 +482,7 @@ static inline ALvoid EAXEcho(ALreverbState *State, ALuint todo, ALfloat (*restri // Perform the non-EAX reverb pass on a given input sample, resulting in // four-channel output. -static inline ALvoid VerbPass(ALreverbState *State, ALuint todo, const ALfloat *in, ALfloat (*restrict out)[4]) +static inline ALvoid VerbPass(ALreverbState *State, ALuint todo, const ALfloat *in, ALfloat (*restrict early)[4], ALfloat (*restrict late)[4]) { ALuint i; @@ -499,7 +493,7 @@ static inline ALvoid VerbPass(ALreverbState *State, ALuint todo, const ALfloat * ); // Calculate the early reflection from the first delay tap. - EarlyReflection(State, todo, out); + EarlyReflection(State, todo, early); // Feed the decorrelator from the energy-attenuated output of the second // delay tap. @@ -512,7 +506,7 @@ static inline ALvoid VerbPass(ALreverbState *State, ALuint todo, const ALfloat * } // Calculate the late reverb from the decorrelator taps. - LateReverb(State, todo, out); + LateReverb(State, todo, late); // Step all delays forward one sample. State->Offset += todo; @@ -552,7 +546,6 @@ static inline ALvoid EAXVerbPass(ALreverbState *State, ALuint todo, const ALfloa } // Calculate the late reverb from the decorrelator taps. - memset(late, 0, sizeof(*late)*todo); LateReverb(State, todo, late); // Calculate and mix in any echo. @@ -564,25 +557,34 @@ static inline ALvoid EAXVerbPass(ALreverbState *State, ALuint todo, const ALfloa static ALvoid ALreverbState_processStandard(ALreverbState *State, ALuint SamplesToDo, const ALfloat *restrict SamplesIn, ALfloat (*restrict SamplesOut)[BUFFERSIZE], ALuint NumChannels) { - ALfloat (*restrict out)[4] = State->ReverbSamples; + ALfloat (*restrict early)[4] = State->EarlySamples; + ALfloat (*restrict late)[4] = State->ReverbSamples; ALuint index, c, i, l; + ALfloat gain; /* Process reverb for these samples. */ for(index = 0;index < SamplesToDo;) { ALuint todo = minu(SamplesToDo-index, MAX_UPDATE_SAMPLES); - VerbPass(State, todo, &SamplesIn[index], out); + VerbPass(State, todo, &SamplesIn[index], early, late); for(l = 0;l < 4;l++) { for(c = 0;c < NumChannels;c++) { - ALfloat gain = State->Gain[l][c]; - if(!(fabsf(gain) > GAIN_SILENCE_THRESHOLD)) - continue; - for(i = 0;i < todo;i++) - SamplesOut[c][index+i] += gain*out[i][l]; + gain = State->Early.PanGain[l][c]; + if(fabsf(gain) > GAIN_SILENCE_THRESHOLD) + { + for(i = 0;i < todo;i++) + SamplesOut[c][index+i] += gain*early[i][l]; + } + gain = State->Late.PanGain[l][c]; + if(fabsf(gain) > GAIN_SILENCE_THRESHOLD) + { + for(i = 0;i < todo;i++) + SamplesOut[c][index+i] += gain*late[i][l]; + } } } @@ -1147,10 +1149,7 @@ static ALvoid Update3DPanning(const ALCdevice *Device, const ALfloat *Reflection * equals sqrt(1/4), a nice gain scaling for the four virtual points * producing an "ambient" response. */ - gain[0] = 0.5f; - gain[1] = 0.5f; - gain[2] = 0.5f; - gain[3] = 0.5f; + gain[0] = gain[1] = gain[2] = gain[3] = 0.5f; length = sqrtf(ReflectionsPan[0]*ReflectionsPan[0] + ReflectionsPan[1]*ReflectionsPan[1] + ReflectionsPan[2]*ReflectionsPan[2]); if(length > 1.0f) { @@ -1180,10 +1179,7 @@ static ALvoid Update3DPanning(const ALCdevice *Device, const ALfloat *Reflection ComputePanningGains(Device->AmbiCoeffs, Device->NumChannels, coeffs, Gain*gain[i], State->Early.PanGain[i]); } - gain[0] = 0.5f; - gain[1] = 0.5f; - gain[2] = 0.5f; - gain[3] = 0.5f; + gain[0] = gain[1] = gain[2] = gain[3] = 0.5f; length = sqrtf(LateReverbPan[0]*LateReverbPan[0] + LateReverbPan[1]*LateReverbPan[1] + LateReverbPan[2]*LateReverbPan[2]); if(length > 1.0f) { @@ -1392,8 +1388,6 @@ static ALeffectState *ALreverbStateFactory_create(ALreverbStateFactory* UNUSED(f state->Offset = 0; - state->Gain = state->Late.PanGain; - return STATIC_CAST(ALeffectState, state); } |