diff options
Diffstat (limited to 'plugins/WinVST/AtmosphereChannel/AtmosphereChannelProc.cpp')
| -rwxr-xr-x | plugins/WinVST/AtmosphereChannel/AtmosphereChannelProc.cpp | 56 |
1 files changed, 18 insertions, 38 deletions
diff --git a/plugins/WinVST/AtmosphereChannel/AtmosphereChannelProc.cpp b/plugins/WinVST/AtmosphereChannel/AtmosphereChannelProc.cpp index 97038e8..bbdf44c 100755 --- a/plugins/WinVST/AtmosphereChannel/AtmosphereChannelProc.cpp +++ b/plugins/WinVST/AtmosphereChannel/AtmosphereChannelProc.cpp @@ -13,7 +13,6 @@ void AtmosphereChannel::processReplacing(float **inputs, float **outputs, VstInt float* in2 = inputs[1]; float* out1 = outputs[0]; float* out2 = outputs[1]; - float fpTemp; double overallscale = 1.0; overallscale /= 44100.0; overallscale *= getSampleRate(); @@ -245,18 +244,14 @@ void AtmosphereChannel::processReplacing(float **inputs, float **outputs, VstInt lastSampleAR = drySampleR; //store the raw R input sample again for use next time - //noise shaping to 32-bit floating point - fpTemp = inputSampleL; - fpNShapeL += (inputSampleL-fpTemp); - inputSampleL += fpNShapeL; - //if this confuses you look at the wordlength for fpTemp :) - fpTemp = inputSampleR; - fpNShapeR += (inputSampleR-fpTemp); - inputSampleR += fpNShapeR; - //for deeper space and warmth, we try a non-oscillating noise shaping - //that is kind of ruthless: it will forever retain the rounding errors - //except we'll dial it back a hair at the end of every buffer processed - //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; @@ -266,12 +261,6 @@ void AtmosphereChannel::processReplacing(float **inputs, float **outputs, VstInt *out1++; *out2++; } - fpNShapeL *= 0.999999; - fpNShapeR *= 0.999999; - //we will just delicately dial back the FP noise shaping, not even every sample - //this is a good place to put subtle 'no runaway' calculations, though bear in mind - //that it will be called more often when you use shorter sample buffers in the DAW. - //So, very low latency operation will call these calculations more often. } void AtmosphereChannel::processDoubleReplacing(double **inputs, double **outputs, VstInt32 sampleFrames) @@ -280,7 +269,6 @@ void AtmosphereChannel::processDoubleReplacing(double **inputs, double **outputs double* in2 = inputs[1]; double* out1 = outputs[0]; double* out2 = outputs[1]; - double fpTemp; double overallscale = 1.0; overallscale /= 44100.0; overallscale *= getSampleRate(); @@ -512,18 +500,16 @@ void AtmosphereChannel::processDoubleReplacing(double **inputs, double **outputs lastSampleAR = drySampleR; //store the raw R input sample again for use next time - //noise shaping to 64-bit floating point - fpTemp = inputSampleL; - fpNShapeL += (inputSampleL-fpTemp); - inputSampleL += fpNShapeL; - //if this confuses you look at the wordlength for fpTemp :) - fpTemp = inputSampleR; - fpNShapeR += (inputSampleR-fpTemp); - inputSampleR += fpNShapeR; - //for deeper space and warmth, we try a non-oscillating noise shaping - //that is kind of ruthless: it will forever retain the rounding errors - //except we'll dial it back a hair at the end of every buffer processed - //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; @@ -533,10 +519,4 @@ void AtmosphereChannel::processDoubleReplacing(double **inputs, double **outputs *out1++; *out2++; } - fpNShapeL *= 0.999999; - fpNShapeR *= 0.999999; - //we will just delicately dial back the FP noise shaping, not even every sample - //this is a good place to put subtle 'no runaway' calculations, though bear in mind - //that it will be called more often when you use shorter sample buffers in the DAW. - //So, very low latency operation will call these calculations more often. }
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