diff options
Diffstat (limited to 'Alc/alcFlanger.c')
| -rw-r--r-- | Alc/alcFlanger.c | 113 |
1 files changed, 65 insertions, 48 deletions
diff --git a/Alc/alcFlanger.c b/Alc/alcFlanger.c index 2d3c35b0..4f9a4f22 100644 --- a/Alc/alcFlanger.c +++ b/Alc/alcFlanger.c @@ -153,7 +153,7 @@ static ALvoid FlangerUpdate(ALeffectState *effect, ALCdevice *Device, const ALef } } -static __inline void CalcTriangleDelays(ALint *delay_left, ALint *delay_right, ALint offset, const ALflangerState *state) +static __inline void Triangle(ALint *delay_left, ALint *delay_right, ALint offset, const ALflangerState *state) { ALfloat lfo_value; @@ -170,7 +170,7 @@ static __inline void CalcTriangleDelays(ALint *delay_left, ALint *delay_right, A *delay_right = (ALint)(lfo_value * state->frequency); } -static __inline void CalcSinusoidDelays(ALint *delay_left, ALint *delay_right, ALint offset, const ALflangerState *state) +static __inline void Sinusoid(ALint *delay_left, ALint *delay_right, ALint offset, const ALflangerState *state) { ALfloat lfo_value; @@ -186,56 +186,73 @@ static __inline void CalcSinusoidDelays(ALint *delay_left, ALint *delay_right, A *delay_right = (ALint)(lfo_value * state->frequency); } +#define DECL_TEMPLATE(func) \ +static void Process##func(ALflangerState *state, ALuint SamplesToDo, \ + const ALfloat *RESTRICT SamplesIn, \ + ALfloat (*RESTRICT SamplesOut)[BUFFERSIZE]) \ +{ \ + const ALint mask = state->BufferLength-1; \ + ALint offset = state->offset; \ + ALuint it, kt; \ + ALuint base; \ + \ + for(base = 0;base < SamplesToDo;) \ + { \ + ALfloat temps[64][2]; \ + ALuint td = minu(SamplesToDo-base, 64); \ + \ + for(it = 0;it < td;it++,offset++) \ + { \ + ALint delay_left, delay_right; \ + (func)(&delay_left, &delay_right, offset, state); \ + \ + temps[it][0] = state->SampleBufferLeft[(offset-delay_left)&mask]; \ + state->SampleBufferLeft[offset&mask] = (temps[it][0] + \ + SamplesIn[it+base]) * \ + state->feedback; \ + \ + temps[it][1] = state->SampleBufferRight[(offset-delay_right)&mask];\ + state->SampleBufferRight[offset&mask] = (temps[it][1] + \ + SamplesIn[it+base]) * \ + state->feedback; \ + } \ + \ + for(kt = 0;kt < MaxChannels;kt++) \ + { \ + ALfloat gain = state->Gain[0][kt]; \ + if(gain > 0.00001f) \ + { \ + for(it = 0;it < td;it++) \ + SamplesOut[kt][it+base] += temps[it][0] * gain; \ + } \ + \ + gain = state->Gain[1][kt]; \ + if(gain > 0.00001f) \ + { \ + for(it = 0;it < td;it++) \ + SamplesOut[kt][it+base] += temps[it][1] * gain; \ + } \ + } \ + \ + base += td; \ + } \ + \ + state->offset = offset; \ +} + +DECL_TEMPLATE(Triangle) +DECL_TEMPLATE(Sinusoid) + +#undef DECL_TEMPLATE + static ALvoid FlangerProcess(ALeffectState *effect, ALuint SamplesToDo, const ALfloat *RESTRICT SamplesIn, ALfloat (*RESTRICT SamplesOut)[BUFFERSIZE]) { ALflangerState *state = GET_PARENT_TYPE(ALflangerState, ALeffectState, effect); - const ALuint mask = state->BufferLength-1; - ALuint it; - ALuint kt; - ALint offset; - ALint delay_left = 0; - ALint delay_right = 0; - ALfloat smp; - - offset = state->offset; - - switch(state->waveform) - { - case AL_FLANGER_WAVEFORM_TRIANGLE: - for(it = 0;it < SamplesToDo;it++,offset++) - { - CalcTriangleDelays(&delay_left, &delay_right, offset, state); - - smp = state->SampleBufferLeft[(offset-delay_left) & mask]; - for(kt = 0;kt < MaxChannels;kt++) - SamplesOut[kt][it] += smp * state->Gain[0][kt]; - state->SampleBufferLeft[offset & mask] = (smp + SamplesIn[it]) * state->feedback; - - smp = state->SampleBufferRight[(offset-delay_right) & mask]; - for(kt = 0;kt < MaxChannels;kt++) - SamplesOut[kt][it] += smp * state->Gain[1][kt]; - state->SampleBufferRight[offset & mask] = (smp + SamplesIn[it]) * state->feedback; - } - break; - case AL_FLANGER_WAVEFORM_SINUSOID: - for(it = 0;it < SamplesToDo;it++,offset++) - { - CalcSinusoidDelays(&delay_left, &delay_right, offset, state); - - smp = state->SampleBufferLeft[(offset-delay_left) & mask]; - for(kt = 0;kt < MaxChannels;kt++) - SamplesOut[kt][it] += smp * state->Gain[0][kt]; - state->SampleBufferLeft[offset & mask] = (smp + SamplesIn[it]) * state->feedback; - - smp = state->SampleBufferRight[(offset-delay_right) & mask]; - for(kt = 0;kt < MaxChannels;kt++) - SamplesOut[kt][it] += smp * state->Gain[1][kt]; - state->SampleBufferRight[offset & mask] = (smp + SamplesIn[it]) * state->feedback; - } - break; - } - state->offset = offset; + if(state->waveform == AL_FLANGER_WAVEFORM_TRIANGLE) + ProcessTriangle(state, SamplesToDo, SamplesIn, SamplesOut); + else if(state->waveform == AL_FLANGER_WAVEFORM_SINUSOID) + ProcessSinusoid(state, SamplesToDo, SamplesIn, SamplesOut); } ALeffectState *FlangerCreate(void) |