diff options
Diffstat (limited to 'plugins/MacAU/Lowpass/Lowpass.cpp')
| -rwxr-xr-x | plugins/MacAU/Lowpass/Lowpass.cpp | 25 |
1 files changed, 7 insertions, 18 deletions
diff --git a/plugins/MacAU/Lowpass/Lowpass.cpp b/plugins/MacAU/Lowpass/Lowpass.cpp index 234b763..f727829 100755 --- a/plugins/MacAU/Lowpass/Lowpass.cpp +++ b/plugins/MacAU/Lowpass/Lowpass.cpp @@ -176,8 +176,7 @@ void Lowpass::LowpassKernel::Reset() { iirSampleA = 0.0; iirSampleB = 0.0; - fpNShapeA = 0.0; - fpNShapeB = 0.0; + fpNShape = 0.0; fpFlip = true; } @@ -205,9 +204,6 @@ void Lowpass::LowpassKernel::Process( const Float32 *inSourceP, Float64 offset; Float64 inputSample; Float64 outputSample; - Float32 fpTemp; - Float64 fpOld = 0.618033988749894848204586; //golden ratio! - Float64 fpNew = 1.0 - fpOld; iirAmount += (iirAmount * tight * tight); if (tight > 0) tight /= 1.5; @@ -262,20 +258,13 @@ void Lowpass::LowpassKernel::Process( const Float32 *inSourceP, } if (wet < 1.0) outputSample = (outputSample * wet) + (inputSample * dry); - - //noise shaping to 32-bit floating point - if (fpFlip) { - fpTemp = outputSample; - fpNShapeA = (fpNShapeA*fpOld)+((outputSample-fpTemp)*fpNew); - outputSample += fpNShapeA; - } - else { - fpTemp = outputSample; - fpNShapeB = (fpNShapeB*fpOld)+((outputSample-fpTemp)*fpNew); - outputSample += fpNShapeB; - } fpFlip = !fpFlip; - //end noise shaping on 32 bit output + + //32 bit dither, made small and tidy. + int expon; frexpf((Float32)inputSample, &expon); + long double dither = (rand()/(RAND_MAX*7.737125245533627e+25))*pow(2,expon+62); + inputSample += (dither-fpNShape); fpNShape = dither; + //end 32 bit dither *destP = outputSample; sourceP += inNumChannels; |