100 lines
4.1 KiB
C++
100 lines
4.1 KiB
C++
#pragma once
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#include <cstdlib>
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namespace trnr::lib::clip {
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// Clipper based on ClipOnly2 by Chris Johnson
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class aw_cliponly2 {
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public:
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aw_cliponly2() {
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samplerate = 44100;
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lastSampleL = 0.0;
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wasPosClipL = false;
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wasNegClipL = false;
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lastSampleR = 0.0;
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wasPosClipR = false;
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wasNegClipR = false;
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for (int x = 0; x < 16; x++) {intermediateL[x] = 0.0; intermediateR[x] = 0.0;}
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//this is reset: values being initialized only once. Startup values, whatever they are.
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}
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void set_samplerate(double _samplerate) {
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samplerate = _samplerate;
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}
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void process_block(double** inputs, double** outputs, long sample_frames) {
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double* in1 = inputs[0];
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double* in2 = inputs[1];
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double* out1 = outputs[0];
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double* out2 = outputs[1];
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double overallscale = 1.0;
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overallscale /= 44100.0;
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overallscale *= samplerate;
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int spacing = floor(overallscale); //should give us working basic scaling, usually 2 or 4
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if (spacing < 1) spacing = 1; if (spacing > 16) spacing = 16;
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while (--sample_frames >= 0)
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{
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double inputSampleL = *in1;
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double inputSampleR = *in2;
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//begin ClipOnly2 stereo as a little, compressed chunk that can be dropped into code
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if (inputSampleL > 4.0) inputSampleL = 4.0; if (inputSampleL < -4.0) inputSampleL = -4.0;
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if (wasPosClipL == true) { //current will be over
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if (inputSampleL<lastSampleL) lastSampleL=0.7058208+(inputSampleL*0.2609148);
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else lastSampleL = 0.2491717+(lastSampleL*0.7390851);
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} wasPosClipL = false;
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if (inputSampleL>0.9549925859) {wasPosClipL=true;inputSampleL=0.7058208+(lastSampleL*0.2609148);}
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if (wasNegClipL == true) { //current will be -over
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if (inputSampleL > lastSampleL) lastSampleL=-0.7058208+(inputSampleL*0.2609148);
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else lastSampleL=-0.2491717+(lastSampleL*0.7390851);
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} wasNegClipL = false;
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if (inputSampleL<-0.9549925859) {wasNegClipL=true;inputSampleL=-0.7058208+(lastSampleL*0.2609148);}
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intermediateL[spacing] = inputSampleL;
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inputSampleL = lastSampleL; //Latency is however many samples equals one 44.1k sample
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for (int x = spacing; x > 0; x--) intermediateL[x-1] = intermediateL[x];
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lastSampleL = intermediateL[0]; //run a little buffer to handle this
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if (inputSampleR > 4.0) inputSampleR = 4.0; if (inputSampleR < -4.0) inputSampleR = -4.0;
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if (wasPosClipR == true) { //current will be over
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if (inputSampleR<lastSampleR) lastSampleR=0.7058208+(inputSampleR*0.2609148);
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else lastSampleR = 0.2491717+(lastSampleR*0.7390851);
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} wasPosClipR = false;
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if (inputSampleR>0.9549925859) {wasPosClipR=true;inputSampleR=0.7058208+(lastSampleR*0.2609148);}
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if (wasNegClipR == true) { //current will be -over
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if (inputSampleR > lastSampleR) lastSampleR=-0.7058208+(inputSampleR*0.2609148);
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else lastSampleR=-0.2491717+(lastSampleR*0.7390851);
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} wasNegClipR = false;
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if (inputSampleR<-0.9549925859) {wasNegClipR=true;inputSampleR=-0.7058208+(lastSampleR*0.2609148);}
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intermediateR[spacing] = inputSampleR;
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inputSampleR = lastSampleR; //Latency is however many samples equals one 44.1k sample
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for (int x = spacing; x > 0; x--) intermediateR[x-1] = intermediateR[x];
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lastSampleR = intermediateR[0]; //run a little buffer to handle this
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//end ClipOnly2 stereo as a little, compressed chunk that can be dropped into code
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*out1 = inputSampleL;
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*out2 = inputSampleR;
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in1++;
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in2++;
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out1++;
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out2++;
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}
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}
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private:
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double samplerate;
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double lastSampleL;
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double intermediateL[16];
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bool wasPosClipL;
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bool wasNegClipL;
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double lastSampleR;
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double intermediateR[16];
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bool wasPosClipR;
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bool wasNegClipR; //Stereo ClipOnly2
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//default stuff
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};
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} |