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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/MacVST/Drive/source | |
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/MacVST/Drive/source')
-rwxr-xr-x | plugins/MacVST/Drive/source/Drive.cpp | 7 | ||||
-rwxr-xr-x | plugins/MacVST/Drive/source/Drive.h | 9 | ||||
-rwxr-xr-x | plugins/MacVST/Drive/source/DriveProc.cpp | 64 |
3 files changed, 25 insertions, 55 deletions
diff --git a/plugins/MacVST/Drive/source/Drive.cpp b/plugins/MacVST/Drive/source/Drive.cpp index 35d0594..ac5f228 100755 --- a/plugins/MacVST/Drive/source/Drive.cpp +++ b/plugins/MacVST/Drive/source/Drive.cpp @@ -20,12 +20,9 @@ Drive::Drive(audioMasterCallback audioMaster) : iirSampleBL = 0.0; iirSampleAR = 0.0; iirSampleBR = 0.0; - - fpNShapeLA = 0.0; - fpNShapeLB = 0.0; - fpNShapeRA = 0.0; - fpNShapeRB = 0.0; fpFlip = true; + fpNShapeL = 0.0; + fpNShapeR = 0.0; //this is reset: values being initialized only once. Startup values, whatever they are. _canDo.insert("plugAsChannelInsert"); // plug-in can be used as a channel insert effect. diff --git a/plugins/MacVST/Drive/source/Drive.h b/plugins/MacVST/Drive/source/Drive.h index c7039c5..525a09e 100755 --- a/plugins/MacVST/Drive/source/Drive.h +++ b/plugins/MacVST/Drive/source/Drive.h @@ -55,17 +55,14 @@ private: char _programName[kVstMaxProgNameLen + 1]; std::set< std::string > _canDo; - long double fpNShapeLA; - long double fpNShapeLB; - long double fpNShapeRA; - long double fpNShapeRB; - bool fpFlip; + long double fpNShapeL; + long double fpNShapeR; //default stuff double iirSampleAL; double iirSampleBL; double iirSampleAR; double iirSampleBR; - + bool fpFlip; float A; float B; float C; diff --git a/plugins/MacVST/Drive/source/DriveProc.cpp b/plugins/MacVST/Drive/source/DriveProc.cpp index 3670e85..074ccfd 100755 --- a/plugins/MacVST/Drive/source/DriveProc.cpp +++ b/plugins/MacVST/Drive/source/DriveProc.cpp @@ -26,9 +26,6 @@ void Drive::processReplacing(float **inputs, float **outputs, VstInt32 sampleFra double glitch = 0.60; double out; - float fpTemp; - long double fpOld = 0.618033988749894848204586; //golden ratio! - long double fpNew = 1.0 - fpOld; long double inputSampleL; long double inputSampleR; @@ -95,6 +92,7 @@ void Drive::processReplacing(float **inputs, float **outputs, VstInt32 sampleFra inputSampleR -= iirSampleBR; } //highpass section + fpFlip = !fpFlip; if (inputSampleL > 1.0) inputSampleL = 1.0; @@ -129,25 +127,14 @@ void Drive::processReplacing(float **inputs, float **outputs, VstInt32 sampleFra //nice little output stage template: if we have another scale of floating point //number, we really don't want to meaninglessly multiply that by 1.0. - //noise shaping to 32-bit floating point - if (fpFlip) { - fpTemp = inputSampleL; - fpNShapeLA = (fpNShapeLA*fpOld)+((inputSampleL-fpTemp)*fpNew); - inputSampleL += fpNShapeLA; - fpTemp = inputSampleR; - fpNShapeRA = (fpNShapeRA*fpOld)+((inputSampleR-fpTemp)*fpNew); - inputSampleR += fpNShapeRA; - } - else { - fpTemp = inputSampleL; - fpNShapeLB = (fpNShapeLB*fpOld)+((inputSampleL-fpTemp)*fpNew); - inputSampleL += fpNShapeLB; - fpTemp = inputSampleR; - fpNShapeRB = (fpNShapeRB*fpOld)+((inputSampleR-fpTemp)*fpNew); - inputSampleR += fpNShapeRB; - } - fpFlip = !fpFlip; - //end noise shaping on 32 bit output + //stereo 32 bit dither, made small and tidy. + int expon; frexpf((float)inputSampleL, &expon); + long double dither = (rand()/(RAND_MAX*7.737125245533627e+25))*pow(2,expon+62); + inputSampleL += (dither-fpNShapeL); fpNShapeL = dither; + frexpf((float)inputSampleR, &expon); + dither = (rand()/(RAND_MAX*7.737125245533627e+25))*pow(2,expon+62); + inputSampleR += (dither-fpNShapeR); fpNShapeR = dither; + //end 32 bit dither *out1 = inputSampleL; *out2 = inputSampleR; @@ -178,9 +165,6 @@ void Drive::processDoubleReplacing(double **inputs, double **outputs, VstInt32 s double glitch = 0.60; double out; - double fpTemp; //this is different from singlereplacing - long double fpOld = 0.618033988749894848204586; //golden ratio! - long double fpNew = 1.0 - fpOld; long double inputSampleL; long double inputSampleR; @@ -247,6 +231,7 @@ void Drive::processDoubleReplacing(double **inputs, double **outputs, VstInt32 s inputSampleR -= iirSampleBR; } //highpass section + fpFlip = !fpFlip; if (inputSampleL > 1.0) inputSampleL = 1.0; @@ -281,25 +266,16 @@ void Drive::processDoubleReplacing(double **inputs, double **outputs, VstInt32 s //nice little output stage template: if we have another scale of floating point //number, we really don't want to meaninglessly multiply that by 1.0. - //noise shaping to 64-bit floating point - if (fpFlip) { - fpTemp = inputSampleL; - fpNShapeLA = (fpNShapeLA*fpOld)+((inputSampleL-fpTemp)*fpNew); - inputSampleL += fpNShapeLA; - fpTemp = inputSampleR; - fpNShapeRA = (fpNShapeRA*fpOld)+((inputSampleR-fpTemp)*fpNew); - inputSampleR += fpNShapeRA; - } - else { - fpTemp = inputSampleL; - fpNShapeLB = (fpNShapeLB*fpOld)+((inputSampleL-fpTemp)*fpNew); - inputSampleL += fpNShapeLB; - fpTemp = inputSampleR; - fpNShapeRB = (fpNShapeRB*fpOld)+((inputSampleR-fpTemp)*fpNew); - inputSampleR += fpNShapeRB; - } - fpFlip = !fpFlip; - //end noise shaping on 64 bit output + //stereo 64 bit dither, made small and tidy. + int expon; frexp((double)inputSampleL, &expon); + long double dither = (rand()/(RAND_MAX*7.737125245533627e+25))*pow(2,expon+62); + dither /= 536870912.0; //needs this to scale to 64 bit zone + inputSampleL += (dither-fpNShapeL); fpNShapeL = dither; + frexp((double)inputSampleR, &expon); + dither = (rand()/(RAND_MAX*7.737125245533627e+25))*pow(2,expon+62); + dither /= 536870912.0; //needs this to scale to 64 bit zone + inputSampleR += (dither-fpNShapeR); fpNShapeR = dither; + //end 64 bit dither *out1 = inputSampleL; *out2 = inputSampleR; |