a2bb4c3f13
The current gain gets explicitly set to the target when the stepping is finished to ensure the target is still used. This way, however, will allow for asynchronously 'canceling' a fade by setting the counter to 0.
147 lines
5.0 KiB
C
147 lines
5.0 KiB
C
#include "config.h"
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#include <assert.h>
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#include "alMain.h"
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#include "alu.h"
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#include "alSource.h"
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#include "alAuxEffectSlot.h"
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static inline ALfloat point32(const ALfloat *vals, ALuint UNUSED(frac))
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{ return vals[0]; }
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static inline ALfloat lerp32(const ALfloat *vals, ALuint frac)
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{ return lerp(vals[0], vals[1], frac * (1.0f/FRACTIONONE)); }
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static inline ALfloat cubic32(const ALfloat *vals, ALuint frac)
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{ return cubic(vals[-1], vals[0], vals[1], vals[2], frac * (1.0f/FRACTIONONE)); }
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void Resample_copy32_C(const ALfloat *data, ALuint UNUSED(frac),
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ALuint increment, ALfloat *restrict OutBuffer, ALuint BufferSize)
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{
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assert(increment==FRACTIONONE);
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memcpy(OutBuffer, data, BufferSize*sizeof(ALfloat));
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}
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#define DECL_TEMPLATE(Sampler) \
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void Resample_##Sampler##_C(const ALfloat *data, ALuint frac, \
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ALuint increment, ALfloat *restrict OutBuffer, ALuint BufferSize) \
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{ \
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ALuint pos = 0; \
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ALuint i; \
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\
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for(i = 0;i < BufferSize;i++) \
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{ \
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OutBuffer[i] = Sampler(data + pos, frac); \
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\
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frac += increment; \
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pos += frac>>FRACTIONBITS; \
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frac &= FRACTIONMASK; \
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} \
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}
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DECL_TEMPLATE(point32)
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DECL_TEMPLATE(lerp32)
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DECL_TEMPLATE(cubic32)
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#undef DECL_TEMPLATE
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static inline void ApplyCoeffsStep(ALuint Offset, ALfloat (*restrict Values)[2],
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const ALuint IrSize,
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ALfloat (*restrict Coeffs)[2],
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const ALfloat (*restrict CoeffStep)[2],
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ALfloat left, ALfloat right)
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{
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ALuint c;
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for(c = 0;c < IrSize;c++)
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{
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const ALuint off = (Offset+c)&HRIR_MASK;
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Values[off][0] += Coeffs[c][0] * left;
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Values[off][1] += Coeffs[c][1] * right;
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Coeffs[c][0] += CoeffStep[c][0];
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Coeffs[c][1] += CoeffStep[c][1];
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}
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}
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static inline void ApplyCoeffs(ALuint Offset, ALfloat (*restrict Values)[2],
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const ALuint IrSize,
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ALfloat (*restrict Coeffs)[2],
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ALfloat left, ALfloat right)
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{
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ALuint c;
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for(c = 0;c < IrSize;c++)
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{
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const ALuint off = (Offset+c)&HRIR_MASK;
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Values[off][0] += Coeffs[c][0] * left;
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Values[off][1] += Coeffs[c][1] * right;
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}
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}
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#define SUFFIX C
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#include "mixer_inc.c"
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#undef SUFFIX
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void MixDirect_C(DirectParams *params, const ALfloat *restrict data, ALuint srcchan,
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ALuint OutPos, ALuint BufferSize)
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{
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ALfloat (*restrict OutBuffer)[BUFFERSIZE] = params->OutBuffer;
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ALuint Counter = maxu(params->Counter, OutPos) - OutPos;
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ALfloat DrySend, Step;
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ALuint c;
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for(c = 0;c < MaxChannels;c++)
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{
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ALuint pos = 0;
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DrySend = params->Mix.Gains.Current[srcchan][c];
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Step = params->Mix.Gains.Step[srcchan][c];
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if(Step != 1.0f && Counter > 0)
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{
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for(;pos < BufferSize && pos < Counter;pos++)
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{
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OutBuffer[c][OutPos+pos] += data[pos]*DrySend;
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DrySend *= Step;
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}
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if(pos == Counter)
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DrySend = params->Mix.Gains.Target[srcchan][c];
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params->Mix.Gains.Current[srcchan][c] = DrySend;
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}
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if(!(DrySend > GAIN_SILENCE_THRESHOLD))
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continue;
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for(;pos < BufferSize;pos++)
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OutBuffer[c][OutPos+pos] += data[pos]*DrySend;
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}
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}
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void MixSend_C(SendParams *params, const ALfloat *restrict data,
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ALuint OutPos, ALuint BufferSize)
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{
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ALfloat (*restrict OutBuffer)[BUFFERSIZE] = params->OutBuffer;
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ALuint Counter = maxu(params->Counter, OutPos) - OutPos;
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ALfloat WetSend, Step;
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{
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ALuint pos = 0;
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WetSend = params->Gain.Current;
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Step = params->Gain.Step;
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if(Step != 1.0f && Counter > 0)
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{
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for(;pos < BufferSize && pos < Counter;pos++)
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{
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OutBuffer[0][OutPos+pos] += data[pos]*WetSend;
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WetSend *= Step;
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}
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if(pos == Counter)
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WetSend = params->Gain.Target;
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params->Gain.Current = WetSend;
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}
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if(!(WetSend > GAIN_SILENCE_THRESHOLD))
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return;
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for(;pos < BufferSize;pos++)
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OutBuffer[0][OutPos+pos] += data[pos] * WetSend;
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}
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}
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