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author | Chris Johnson <jinx6568@sover.net> | 2019-01-27 21:13:54 -0500 |
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committer | Chris Johnson <jinx6568@sover.net> | 2019-01-27 21:13:54 -0500 |
commit | 966f2d253cd2ee6ce140ad68095a20a9d2b63052 (patch) | |
tree | b0400d95bd06512531ade6ddf55190a58b6a5623 /plugins/MacAU/Point/Poynt.cpp | |
parent | 0887543349dbbec0721a1fc8b1c7deba9afefa8b (diff) | |
download | airwindows-lv2-port-966f2d253cd2ee6ce140ad68095a20a9d2b63052.tar.gz airwindows-lv2-port-966f2d253cd2ee6ce140ad68095a20a9d2b63052.tar.bz2 airwindows-lv2-port-966f2d253cd2ee6ce140ad68095a20a9d2b63052.zip |
Floating Point Dither For All
Diffstat (limited to 'plugins/MacAU/Point/Poynt.cpp')
-rwxr-xr-x | plugins/MacAU/Point/Poynt.cpp | 27 |
1 files changed, 7 insertions, 20 deletions
diff --git a/plugins/MacAU/Point/Poynt.cpp b/plugins/MacAU/Point/Poynt.cpp index fb51374..b8b7030 100755 --- a/plugins/MacAU/Point/Poynt.cpp +++ b/plugins/MacAU/Point/Poynt.cpp @@ -178,8 +178,7 @@ void Poynt::PoyntKernel::Reset() nobA = 0.0; nibB = 0.0; nobB = 0.0; - fpNShapeA = 0.0; - fpNShapeB = 0.0; + fpNShape = 0.0; fpFlip = true; } @@ -216,11 +215,6 @@ void Poynt::PoyntKernel::Process( const Float32 *inSourceP, Float64 nibnobFactor = 0.0; //start with the fallthrough value, why not long double inputSample; Float64 absolute; - - Float32 fpTemp; - Float64 fpOld = 0.618033988749894848204586; //golden ratio! - Float64 fpNew = 1.0 - fpOld; - while (nSampleFrames-- > 0) { inputSample = *sourceP; @@ -278,20 +272,13 @@ void Poynt::PoyntKernel::Process( const Float32 *inSourceP, } inputSample *= nibnobFactor; - - //noise shaping to 32-bit floating point - if (fpFlip) { - fpTemp = inputSample; - fpNShapeA = (fpNShapeA*fpOld)+((inputSample-fpTemp)*fpNew); - inputSample += fpNShapeA; - } - else { - fpTemp = inputSample; - fpNShapeB = (fpNShapeB*fpOld)+((inputSample-fpTemp)*fpNew); - inputSample += 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 = inputSample; destP += inNumChannels; |