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author | Chris Johnson <jinx6568@sover.net> | 2018-10-22 18:04:06 -0400 |
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committer | Chris Johnson <jinx6568@sover.net> | 2018-10-22 18:04:06 -0400 |
commit | 633be2e22c6648c901f08f3b4cd4e8e14ea86443 (patch) | |
tree | 1e272c3d2b5bd29636b9f9f521af62734e4df012 /plugins/LinuxVST/src/Lowpass | |
parent | 057757aa8eb0a463caf0cdfdb5894ac5f723ff3f (diff) | |
download | airwindows-lv2-port-633be2e22c6648c901f08f3b4cd4e8e14ea86443.tar.gz airwindows-lv2-port-633be2e22c6648c901f08f3b4cd4e8e14ea86443.tar.bz2 airwindows-lv2-port-633be2e22c6648c901f08f3b4cd4e8e14ea86443.zip |
Updates (in case my plane crashes)
Diffstat (limited to 'plugins/LinuxVST/src/Lowpass')
-rwxr-xr-x | plugins/LinuxVST/src/Lowpass/Lowpass.cpp | 142 | ||||
-rwxr-xr-x | plugins/LinuxVST/src/Lowpass/Lowpass.h | 74 | ||||
-rwxr-xr-x | plugins/LinuxVST/src/Lowpass/LowpassProc.cpp | 302 |
3 files changed, 518 insertions, 0 deletions
diff --git a/plugins/LinuxVST/src/Lowpass/Lowpass.cpp b/plugins/LinuxVST/src/Lowpass/Lowpass.cpp new file mode 100755 index 0000000..8178799 --- /dev/null +++ b/plugins/LinuxVST/src/Lowpass/Lowpass.cpp @@ -0,0 +1,142 @@ +/* ======================================== + * Lowpass - Lowpass.h + * Copyright (c) 2016 airwindows, All rights reserved + * ======================================== */ + +#ifndef __Lowpass_H +#include "Lowpass.h" +#endif + +AudioEffect* createEffectInstance(audioMasterCallback audioMaster) {return new Lowpass(audioMaster);} + +Lowpass::Lowpass(audioMasterCallback audioMaster) : + AudioEffectX(audioMaster, kNumPrograms, kNumParameters) +{ + A = 1.0; + B = 0.5; + C = 1.0; + iirSampleAL = 0.0; + iirSampleBL = 0.0; + iirSampleAR = 0.0; + iirSampleBR = 0.0; + fpNShapeLA = 0.0; + fpNShapeLB = 0.0; + fpNShapeRA = 0.0; + fpNShapeRB = 0.0; + fpFlip = true; + //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. + _canDo.insert("plugAsSend"); // plug-in can be used as a send effect. + _canDo.insert("x2in2out"); + setNumInputs(kNumInputs); + setNumOutputs(kNumOutputs); + setUniqueID(kUniqueId); + canProcessReplacing(); // supports output replacing + canDoubleReplacing(); // supports double precision processing + programsAreChunks(true); + vst_strncpy (_programName, "Default", kVstMaxProgNameLen); // default program name +} + +Lowpass::~Lowpass() {} +VstInt32 Lowpass::getVendorVersion () {return 1000;} +void Lowpass::setProgramName(char *name) {vst_strncpy (_programName, name, kVstMaxProgNameLen);} +void Lowpass::getProgramName(char *name) {vst_strncpy (name, _programName, kVstMaxProgNameLen);} +//airwindows likes to ignore this stuff. Make your own programs, and make a different plugin rather than +//trying to do versioning and preventing people from using older versions. Maybe they like the old one! + +static float pinParameter(float data) +{ + if (data < 0.0f) return 0.0f; + if (data > 1.0f) return 1.0f; + return data; +} + +VstInt32 Lowpass::getChunk (void** data, bool isPreset) +{ + float *chunkData = (float *)calloc(kNumParameters, sizeof(float)); + chunkData[0] = A; + chunkData[1] = B; + chunkData[2] = C; + /* Note: The way this is set up, it will break if you manage to save settings on an Intel + machine and load them on a PPC Mac. However, it's fine if you stick to the machine you + started with. */ + + *data = chunkData; + return kNumParameters * sizeof(float); +} + +VstInt32 Lowpass::setChunk (void* data, VstInt32 byteSize, bool isPreset) +{ + float *chunkData = (float *)data; + A = pinParameter(chunkData[0]); + B = pinParameter(chunkData[1]); + C = pinParameter(chunkData[2]); + /* We're ignoring byteSize as we found it to be a filthy liar */ + + /* calculate any other fields you need here - you could copy in + code from setParameter() here. */ + return 0; +} + +void Lowpass::setParameter(VstInt32 index, float value) { + switch (index) { + case kParamA: A = value; break; + case kParamB: B = value; break; //percent. Using this value, it'll be 0-100 everywhere + case kParamC: C = value; break; + default: throw; // unknown parameter, shouldn't happen! + } +} + +float Lowpass::getParameter(VstInt32 index) { + switch (index) { + case kParamA: return A; break; + case kParamB: return B; break; + case kParamC: return C; break; + default: break; // unknown parameter, shouldn't happen! + } return 0.0; //we only need to update the relevant name, this is simple to manage +} + +void Lowpass::getParameterName(VstInt32 index, char *text) { + switch (index) { + case kParamA: vst_strncpy (text, "Lowpass", kVstMaxParamStrLen); break; + case kParamB: vst_strncpy (text, "Soft/Hard", kVstMaxParamStrLen); break; + case kParamC: vst_strncpy (text, "Dry/Wet", kVstMaxParamStrLen); break; + default: break; // unknown parameter, shouldn't happen! + } //this is our labels for displaying in the VST host +} + +void Lowpass::getParameterDisplay(VstInt32 index, char *text) { + switch (index) { + case kParamA: float2string (A, text, kVstMaxParamStrLen); break; + case kParamB: float2string ((B * 2.0)-1.0, text, kVstMaxParamStrLen); break; //also display 0-1 as percent + case kParamC: float2string (C, text, kVstMaxParamStrLen); break; + default: break; // unknown parameter, shouldn't happen! + } //this displays the values and handles 'popups' where it's discrete choices +} + +void Lowpass::getParameterLabel(VstInt32 index, char *text) { + switch (index) { + case kParamA: vst_strncpy (text, " ", kVstMaxParamStrLen); break; + case kParamB: vst_strncpy (text, " ", kVstMaxParamStrLen); break; //the percent + case kParamC: vst_strncpy (text, " ", kVstMaxParamStrLen); break; + default: break; // unknown parameter, shouldn't happen! + } +} + +VstInt32 Lowpass::canDo(char *text) +{ return (_canDo.find(text) == _canDo.end()) ? -1: 1; } // 1 = yes, -1 = no, 0 = don't know + +bool Lowpass::getEffectName(char* name) { + vst_strncpy(name, "Lowpass", kVstMaxProductStrLen); return true; +} + +VstPlugCategory Lowpass::getPlugCategory() {return kPlugCategEffect;} + +bool Lowpass::getProductString(char* text) { + vst_strncpy (text, "airwindows Lowpass", kVstMaxProductStrLen); return true; +} + +bool Lowpass::getVendorString(char* text) { + vst_strncpy (text, "airwindows", kVstMaxVendorStrLen); return true; +} diff --git a/plugins/LinuxVST/src/Lowpass/Lowpass.h b/plugins/LinuxVST/src/Lowpass/Lowpass.h new file mode 100755 index 0000000..1b99c55 --- /dev/null +++ b/plugins/LinuxVST/src/Lowpass/Lowpass.h @@ -0,0 +1,74 @@ +/* ======================================== + * Lowpass - Lowpass.h + * Created 8/12/11 by SPIAdmin + * Copyright (c) 2011 __MyCompanyName__, All rights reserved + * ======================================== */ + +#ifndef __Lowpass_H +#define __Lowpass_H + +#ifndef __audioeffect__ +#include "audioeffectx.h" +#endif + +#include <set> +#include <string> +#include <math.h> + +enum { + kParamA = 0, + kParamB = 1, + kParamC = 2, + kNumParameters = 3 +}; // + +const int kNumPrograms = 0; +const int kNumInputs = 2; +const int kNumOutputs = 2; +const unsigned long kUniqueId = 'lops'; //Change this to what the AU identity is! + +class Lowpass : + public AudioEffectX +{ +public: + Lowpass(audioMasterCallback audioMaster); + ~Lowpass(); + virtual bool getEffectName(char* name); // The plug-in name + virtual VstPlugCategory getPlugCategory(); // The general category for the plug-in + virtual bool getProductString(char* text); // This is a unique plug-in string provided by Steinberg + virtual bool getVendorString(char* text); // Vendor info + virtual VstInt32 getVendorVersion(); // Version number + virtual void processReplacing (float** inputs, float** outputs, VstInt32 sampleFrames); + virtual void processDoubleReplacing (double** inputs, double** outputs, VstInt32 sampleFrames); + virtual void getProgramName(char *name); // read the name from the host + virtual void setProgramName(char *name); // changes the name of the preset displayed in the host + virtual VstInt32 getChunk (void** data, bool isPreset); + virtual VstInt32 setChunk (void* data, VstInt32 byteSize, bool isPreset); + virtual float getParameter(VstInt32 index); // get the parameter value at the specified index + virtual void setParameter(VstInt32 index, float value); // set the parameter at index to value + virtual void getParameterLabel(VstInt32 index, char *text); // label for the parameter (eg dB) + virtual void getParameterName(VstInt32 index, char *text); // name of the parameter + virtual void getParameterDisplay(VstInt32 index, char *text); // text description of the current value + virtual VstInt32 canDo(char *text); +private: + char _programName[kVstMaxProgNameLen + 1]; + std::set< std::string > _canDo; + + long double fpNShapeLA; + long double fpNShapeLB; + long double fpNShapeRA; + long double fpNShapeRB; + bool fpFlip; + //default stuff + + float A; + float B; + float C; + double iirSampleAL; + double iirSampleBL; + double iirSampleAR; + double iirSampleBR; + +}; + +#endif diff --git a/plugins/LinuxVST/src/Lowpass/LowpassProc.cpp b/plugins/LinuxVST/src/Lowpass/LowpassProc.cpp new file mode 100755 index 0000000..bcce714 --- /dev/null +++ b/plugins/LinuxVST/src/Lowpass/LowpassProc.cpp @@ -0,0 +1,302 @@ +/* ======================================== + * Lowpass - Lowpass.h + * Copyright (c) 2016 airwindows, All rights reserved + * ======================================== */ + +#ifndef __Lowpass_H +#include "Lowpass.h" +#endif + +void Lowpass::processReplacing(float **inputs, float **outputs, VstInt32 sampleFrames) +{ + float* in1 = inputs[0]; + float* in2 = inputs[1]; + float* out1 = outputs[0]; + float* out2 = outputs[1]; + + double overallscale = 1.0; + overallscale /= 44100.0; + overallscale *= getSampleRate(); + double iirAmount = (pow(A,2)+A)/2.0; + iirAmount /= overallscale; + double tight = (B*2.0)-1.0; + double wet = C; + double dry = 1.0 - wet; + double offset; + double inputSampleL; + double inputSampleR; + double outputSampleL; + double outputSampleR; + float fpTemp; + long double fpOld = 0.618033988749894848204586; //golden ratio! + long double fpNew = 1.0 - fpOld; + + iirAmount += (iirAmount * tight * tight); + if (tight > 0) tight /= 1.5; + else tight /= 3.0; + //we are setting it up so that to either extreme we can get an audible sound, + //but sort of scaled so small adjustments don't shift the cutoff frequency yet. + if (iirAmount <= 0.0) iirAmount = 0.0; + if (iirAmount > 1.0) iirAmount = 1.0; + //handle the change in cutoff frequency + + while (--sampleFrames >= 0) + { + inputSampleL = *in1; + inputSampleR = *in2; + if (inputSampleL<1.2e-38 && -inputSampleL<1.2e-38) { + static int noisesource = 0; + //this declares a variable before anything else is compiled. It won't keep assigning + //it to 0 for every sample, it's as if the declaration doesn't exist in this context, + //but it lets me add this denormalization fix in a single place rather than updating + //it in three different locations. The variable isn't thread-safe but this is only + //a random seed and we can share it with whatever. + noisesource = noisesource % 1700021; noisesource++; + int residue = noisesource * noisesource; + residue = residue % 170003; residue *= residue; + residue = residue % 17011; residue *= residue; + residue = residue % 1709; residue *= residue; + residue = residue % 173; residue *= residue; + residue = residue % 17; + double applyresidue = residue; + applyresidue *= 0.00000001; + applyresidue *= 0.00000001; + inputSampleL = applyresidue; + } + if (inputSampleR<1.2e-38 && -inputSampleR<1.2e-38) { + static int noisesource = 0; + noisesource = noisesource % 1700021; noisesource++; + int residue = noisesource * noisesource; + residue = residue % 170003; residue *= residue; + residue = residue % 17011; residue *= residue; + residue = residue % 1709; residue *= residue; + residue = residue % 173; residue *= residue; + residue = residue % 17; + double applyresidue = residue; + applyresidue *= 0.00000001; + applyresidue *= 0.00000001; + inputSampleR = applyresidue; + //this denormalization routine produces a white noise at -300 dB which the noise + //shaping will interact with to produce a bipolar output, but the noise is actually + //all positive. That should stop any variables from going denormal, and the routine + //only kicks in if digital black is input. As a final touch, if you save to 24-bit + //the silence will return to being digital black again. + } + + outputSampleL = inputSampleL; + outputSampleR = inputSampleR; + + if (tight > 0) offset = (1 - tight) + (fabs(inputSampleL)*tight); + else offset = (1 + tight) + ((1-fabs(inputSampleL))*tight); + if (offset < 0) offset = 0; + if (offset > 1) offset = 1; + if (fpFlip) + { + iirSampleAL = (iirSampleAL * (1 - (offset * iirAmount))) + (inputSampleL * (offset * iirAmount)); + outputSampleL = iirSampleAL; + } + else + { + iirSampleBL = (iirSampleBL * (1 - (offset * iirAmount))) + (inputSampleL * (offset * iirAmount)); + outputSampleL = iirSampleBL; + } + + + if (tight > 0) offset = (1 - tight) + (fabs(inputSampleR)*tight); + else offset = (1 + tight) + ((1-fabs(inputSampleR))*tight); + if (offset < 0) offset = 0; + if (offset > 1) offset = 1; + if (fpFlip) + { + iirSampleAR = (iirSampleAR * (1 - (offset * iirAmount))) + (inputSampleR * (offset * iirAmount)); + outputSampleR = iirSampleAR; + } + else + { + iirSampleBR = (iirSampleBR * (1 - (offset * iirAmount))) + (inputSampleR * (offset * iirAmount)); + outputSampleR = iirSampleBR; + } + + + + if (wet < 1.0) outputSampleL = (outputSampleL * wet) + (inputSampleL * dry); + if (wet < 1.0) outputSampleR = (outputSampleR * wet) + (inputSampleR * dry); + + //noise shaping to 32-bit floating point + if (fpFlip) { + fpTemp = outputSampleL; + fpNShapeLA = (fpNShapeLA*fpOld)+((outputSampleL-fpTemp)*fpNew); + outputSampleL += fpNShapeLA; + + fpTemp = outputSampleR; + fpNShapeRA = (fpNShapeRA*fpOld)+((outputSampleR-fpTemp)*fpNew); + outputSampleR += fpNShapeRA; + } + else { + fpTemp = outputSampleL; + fpNShapeLB = (fpNShapeLB*fpOld)+((outputSampleL-fpTemp)*fpNew); + outputSampleL += fpNShapeLB; + + fpTemp = outputSampleR; + fpNShapeRB = (fpNShapeRB*fpOld)+((outputSampleR-fpTemp)*fpNew); + outputSampleR += fpNShapeRB; + } + fpFlip = !fpFlip; + //end noise shaping on 32 bit output + + *out1 = outputSampleL; + *out2 = outputSampleR; + + *in1++; + *in2++; + *out1++; + *out2++; + } +} + +void Lowpass::processDoubleReplacing(double **inputs, double **outputs, VstInt32 sampleFrames) +{ + double* in1 = inputs[0]; + double* in2 = inputs[1]; + double* out1 = outputs[0]; + double* out2 = outputs[1]; + + double overallscale = 1.0; + overallscale /= 44100.0; + overallscale *= getSampleRate(); + double iirAmount = (pow(A,2)+A)/2.0; + iirAmount /= overallscale; + double tight = (B*2.0)-1.0; + double wet = C; + double dry = 1.0 - wet; + double offset; + double inputSampleL; + double inputSampleR; + double outputSampleL; + double outputSampleR; + double fpTemp; + double fpOld = 0.618033988749894848204586; //golden ratio! + double fpNew = 1.0 - fpOld; + + iirAmount += (iirAmount * tight * tight); + if (tight > 0) tight /= 1.5; + else tight /= 3.0; + //we are setting it up so that to either extreme we can get an audible sound, + //but sort of scaled so small adjustments don't shift the cutoff frequency yet. + if (iirAmount <= 0.0) iirAmount = 0.0; + if (iirAmount > 1.0) iirAmount = 1.0; + //handle the change in cutoff frequency + + while (--sampleFrames >= 0) + { + inputSampleL = *in1; + inputSampleR = *in2; + if (inputSampleL<1.2e-38 && -inputSampleL<1.2e-38) { + static int noisesource = 0; + //this declares a variable before anything else is compiled. It won't keep assigning + //it to 0 for every sample, it's as if the declaration doesn't exist in this context, + //but it lets me add this denormalization fix in a single place rather than updating + //it in three different locations. The variable isn't thread-safe but this is only + //a random seed and we can share it with whatever. + noisesource = noisesource % 1700021; noisesource++; + int residue = noisesource * noisesource; + residue = residue % 170003; residue *= residue; + residue = residue % 17011; residue *= residue; + residue = residue % 1709; residue *= residue; + residue = residue % 173; residue *= residue; + residue = residue % 17; + double applyresidue = residue; + applyresidue *= 0.00000001; + applyresidue *= 0.00000001; + inputSampleL = applyresidue; + } + if (inputSampleR<1.2e-38 && -inputSampleR<1.2e-38) { + static int noisesource = 0; + noisesource = noisesource % 1700021; noisesource++; + int residue = noisesource * noisesource; + residue = residue % 170003; residue *= residue; + residue = residue % 17011; residue *= residue; + residue = residue % 1709; residue *= residue; + residue = residue % 173; residue *= residue; + residue = residue % 17; + double applyresidue = residue; + applyresidue *= 0.00000001; + applyresidue *= 0.00000001; + inputSampleR = applyresidue; + //this denormalization routine produces a white noise at -300 dB which the noise + //shaping will interact with to produce a bipolar output, but the noise is actually + //all positive. That should stop any variables from going denormal, and the routine + //only kicks in if digital black is input. As a final touch, if you save to 24-bit + //the silence will return to being digital black again. + } + + outputSampleL = inputSampleL; + outputSampleR = inputSampleR; + + if (tight > 0) offset = (1 - tight) + (fabs(inputSampleL)*tight); + else offset = (1 + tight) + ((1-fabs(inputSampleL))*tight); + if (offset < 0) offset = 0; + if (offset > 1) offset = 1; + if (fpFlip) + { + iirSampleAL = (iirSampleAL * (1 - (offset * iirAmount))) + (inputSampleL * (offset * iirAmount)); + outputSampleL = iirSampleAL; + } + else + { + iirSampleBL = (iirSampleBL * (1 - (offset * iirAmount))) + (inputSampleL * (offset * iirAmount)); + outputSampleL = iirSampleBL; + } + + + if (tight > 0) offset = (1 - tight) + (fabs(inputSampleR)*tight); + else offset = (1 + tight) + ((1-fabs(inputSampleR))*tight); + if (offset < 0) offset = 0; + if (offset > 1) offset = 1; + if (fpFlip) + { + iirSampleAR = (iirSampleAR * (1 - (offset * iirAmount))) + (inputSampleR * (offset * iirAmount)); + outputSampleR = iirSampleAR; + } + else + { + iirSampleBR = (iirSampleBR * (1 - (offset * iirAmount))) + (inputSampleR * (offset * iirAmount)); + outputSampleR = iirSampleBR; + } + + + + if (wet < 1.0) outputSampleL = (outputSampleL * wet) + (inputSampleL * dry); + if (wet < 1.0) outputSampleR = (outputSampleR * wet) + (inputSampleR * dry); + + //noise shaping to 64-bit floating point + if (fpFlip) { + fpTemp = outputSampleL; + fpNShapeLA = (fpNShapeLA*fpOld)+((outputSampleL-fpTemp)*fpNew); + outputSampleL += fpNShapeLA; + + fpTemp = outputSampleR; + fpNShapeRA = (fpNShapeRA*fpOld)+((outputSampleR-fpTemp)*fpNew); + outputSampleR += fpNShapeRA; + } + else { + fpTemp = outputSampleL; + fpNShapeLB = (fpNShapeLB*fpOld)+((outputSampleL-fpTemp)*fpNew); + outputSampleL += fpNShapeLB; + + fpTemp = outputSampleR; + fpNShapeRB = (fpNShapeRB*fpOld)+((outputSampleR-fpTemp)*fpNew); + outputSampleR += fpNShapeRB; + } + fpFlip = !fpFlip; + //end noise shaping on 32 bit output + + *out1 = outputSampleL; + *out2 = outputSampleR; + + *in1++; + *in2++; + *out1++; + *out2++; + } +}
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