diff options
| author | mick grierson <mickgrierson@gmail.com> | 2015-10-27 17:05:12 +0000 |
|---|---|---|
| committer | mick grierson <mickgrierson@gmail.com> | 2015-10-27 17:05:12 +0000 |
| commit | 60341ac292bb9ba6f1d33632f8fd8e767c6a99d4 (patch) | |
| tree | dd801de535997f2f6ff4fc6faab8cfc86c003b7a /openFrameworks/ofxMaxim/libs/maximilian.h | |
| parent | bb210658ed2aa4eafa790197f84f3e24df22351b (diff) | |
clean up
Diffstat (limited to 'openFrameworks/ofxMaxim/libs/maximilian.h')
| -rwxr-xr-x | openFrameworks/ofxMaxim/libs/maximilian.h | 637 |
1 files changed, 637 insertions, 0 deletions
diff --git a/openFrameworks/ofxMaxim/libs/maximilian.h b/openFrameworks/ofxMaxim/libs/maximilian.h new file mode 100755 index 0000000..8a78c26 --- /dev/null +++ b/openFrameworks/ofxMaxim/libs/maximilian.h @@ -0,0 +1,637 @@ +/* + * maximilian.h + * platform independent synthesis library using portaudio or rtaudio + * + * Created by Mick Grierson on 29/12/2009. + * Copyright 2009 Mick Grierson & Strangeloop Limited. All rights reserved. + * Thanks to the Goldsmiths Creative Computing Team. + * Special thanks to Arturo Castro for the PortAudio implementation. + * + * Permission is hereby granted, free of charge, to any person + * obtaining a copy of this software and associated documentation + * files (the "Software"), to deal in the Software without + * restriction, including without limitation the rights to use, + * copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following + * conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES + * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT + * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, + * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + * + */ + +#ifndef MAXIMILIAN_H +#define MAXIMILIAN_H + +//#define MAXIMILIAN_PORTAUDIO +#define MAXIMILIAN_RT_AUDIO + + +#include <iostream> +#include <fstream> +#include <string.h> +#include <cstdlib> +#include "math.h" + +#ifdef _WIN32 //|| _WIN64 +#include <algorithm> +#endif + +using namespace std; +#ifndef PI +#define PI 3.1415926535897932384626433832795 +#endif +#define TWOPI 6.283185307179586476925286766559 + +class maxiSettings { +public: + static int sampleRate; + static int channels; + static int bufferSize; + static void setup(int initSampleRate, int initChannels, int initBufferSize) { + maxiSettings::sampleRate = initSampleRate; + maxiSettings::channels = initChannels; + maxiSettings::bufferSize = initBufferSize; + } +}; + + +class maxiOsc { + + double frequency; + double phase; + double startphase; + double endphase; + double output; + double tri; + + +public: + maxiOsc(); + double sinewave(double frequency); + double coswave(double frequency); + double phasor(double frequency); + double phasor(double frequency, double startphase, double endphase); + double saw(double frequency); + double triangle(double frequency); + double square(double frequency); + double pulse(double frequency, double duty); + double noise(); + double sinebuf(double frequency); + double sinebuf4(double frequency); + double sawn(double frequency); + double rect(double frequency, double duty=0.5); + void phaseReset(double phaseIn); + +}; + + +class maxiEnvelope { + + double period; + double output; + double startval; + double currentval; + double nextval; + int isPlaying; + +public: + double line(int numberofsegments,double segments[100]); + void trigger(int index,double amp); + int valindex; + double amplitude; + +}; + + +class maxiDelayline { + double frequency; + int phase; + double startphase; + double endphase; + double output; + double memory[88200]; + +public: + maxiDelayline(); + double dl(double input, int size, double feedback); + double dl(double input, int size, double feedback, int position); + + +}; + + +class maxiFilter { + double gain; + double input; + double output; + double inputs[10]; + double outputs[10]; + double cutoff1; + double x;//speed + double y;//pos + double z;//pole + double c;//filter coefficient + +public: + maxiFilter():x(0.0), y(0.0), z(0.0), c(0.0){}; + double cutoff; + double resonance; + double lores(double input,double cutoff1, double resonance); + double hires(double input,double cutoff1, double resonance); + double bandpass(double input,double cutoff1, double resonance); + double lopass(double input,double cutoff); + double hipass(double input,double cutoff); + +}; + +class maxiMix { + double input; + double two[2]; + double four[4]; + double eight[8]; +public: + double x; + double y; + double z; + double *stereo(double input,double two[2],double x); + double *quad(double input,double four[4], double x,double y); + double *ambisonic(double input,double eight[8],double x,double y, double z); + +}; + +//lagging with an exponential moving average +//a lower alpha value gives a slower lag +template <class T> +class maxiLagExp { +public: + T alpha, alphaReciprocal; + T val; + + maxiLagExp() { + init(0.5, 0.0); + }; + + maxiLagExp(T initAlpha, T initVal) { + init(initAlpha, initVal); + } + + void init(T initAlpha, T initVal) { + alpha = initAlpha; + alphaReciprocal = 1.0 - alpha; + val = initVal; + } + + inline void addSample(T newVal) { + val = (alpha * newVal) + (alphaReciprocal * val); + } + + inline T value() { + return val; + } +}; + + +class maxiSample { + +private: + string myPath; + int myChunkSize; + int mySubChunk1Size; + int readChannel; + short myFormat; + int myByteRate; + short myBlockAlign; + short myBitsPerSample; + double position, recordPosition; + double speed; + double output; + maxiLagExp<double> loopRecordLag; + +public: + int myDataSize; + short myChannels; + int mySampleRate; + long length; + void getLength(); + void setLength(unsigned long numSamples); + + +// char* myData; + short* temp; + + // get/set for the Path property + + ~maxiSample() + { +// if (myData) free(myData); + if (temp) free(temp); + printf("freeing SampleData"); + + } + + maxiSample():temp(NULL),position(0), recordPosition(0), myChannels(1), mySampleRate(maxiSettings::sampleRate) {}; + + maxiSample& operator=(const maxiSample &source) { + if (this == &source) + return *this; + position=0; + recordPosition = 0; + myChannels = source.myChannels; + mySampleRate = maxiSettings::sampleRate; + free(temp); + myDataSize = source.myDataSize; + temp = (short*) malloc(myDataSize * sizeof(char)); + memcpy(temp, source.temp, myDataSize * sizeof(char)); + length = source.length; + return *this; + } + + bool load(string fileName, int channel=0); + + bool loadOgg(string filename,int channel=0); + + void trigger(); + + // read a wav file into this class + bool read(); + + //read an ogg file into this class using stb_vorbis + bool readOgg(); + + void loopRecord(double newSample, const bool recordEnabled, const double recordMix, double start = 0.0, double end = 1.0) { + loopRecordLag.addSample(recordEnabled); + if (recordPosition < start * length) recordPosition = start * length; + if(recordEnabled) { + double currentSample = temp[(unsigned long)recordPosition] / 32767.0; + newSample = (recordMix * currentSample) + ((1.0 - recordMix) * newSample); + newSample *= loopRecordLag.value(); + temp[(unsigned long)recordPosition] = newSample * 32767; + } + ++recordPosition; + if (recordPosition >= end * length) + recordPosition= start * length; + } + + void clear(); + + void reset(); + + double play(); + + double playLoop(double start, double end); // start and end are between 0.0 and 1.0 + + double playOnce(); + + double playOnce(double speed); + + void setPosition(double newPos); // between 0.0 and 1.0 + + double playUntil(double end); + + double play(double speed); + + double play(double frequency, double start, double end, double &pos); + + double play(double frequency, double start, double end); + + double play4(double frequency, double start, double end); + + double bufferPlay(unsigned char &bufferin,long length); + + double bufferPlay(unsigned char &bufferin,double speed,long length); + + double bufferPlay(unsigned char &bufferin,double frequency, double start, double end); + + double bufferPlay4(unsigned char &bufferin,double frequency, double start, double end); + bool save() { + return save(myPath); + } + + bool save(string filename) + { + fstream myFile (filename.c_str(), ios::out | ios::binary); + + // write the wav file per the wav file format + myFile.seekp (0, ios::beg); + myFile.write ("RIFF", 4); + myFile.write ((char*) &myChunkSize, 4); + myFile.write ("WAVE", 4); + myFile.write ("fmt ", 4); + myFile.write ((char*) &mySubChunk1Size, 4); + myFile.write ((char*) &myFormat, 2); + myFile.write ((char*) &myChannels, 2); + myFile.write ((char*) &mySampleRate, 4); + myFile.write ((char*) &myByteRate, 4); + myFile.write ((char*) &myBlockAlign, 2); + myFile.write ((char*) &myBitsPerSample, 2); + myFile.write ("data", 4); + myFile.write ((char*) &myDataSize, 4); + myFile.write ((char*) temp, myDataSize); + + return true; + } + + // return a printable summary of the wav file + char *getSummary() + { + char *summary = new char[250]; + sprintf(summary, " Format: %d\n Channels: %d\n SampleRate: %d\n ByteRate: %d\n BlockAlign: %d\n BitsPerSample: %d\n DataSize: %d\n", myFormat, myChannels, mySampleRate, myByteRate, myBlockAlign, myBitsPerSample, myDataSize); + std::cout << myDataSize; + return summary; + } + + void normalise(float maxLevel = 0.99); //0 < maxLevel < 1.0 + void autoTrim(float alpha = 0.3, float threshold = 6000, bool trimStart = true, bool trimEnd = true); //alpha of lag filter (lower == slower reaction), threshold to mark start and end, < 32767 +}; + + +class maxiMap { +public: + static double inline linlin(double val, double inMin, double inMax, double outMin, double outMax) { + val = max(min(val, inMax), inMin); + return ((val - inMin) / (inMax - inMin) * (outMax - outMin)) + outMin; + } + + static double inline linexp(double val, double inMin, double inMax, double outMin, double outMax) { + //clipping + val = max(min(val, inMax), inMin); + return pow((outMax / outMin), (val - inMin) / (inMax - inMin)) * outMin; + } + + static double inline explin(double val, double inMin, double inMax, double outMin, double outMax) { + //clipping + val = max(min(val, inMax), inMin); + return (log(val/inMin) / log(inMax/inMin) * (outMax - outMin)) + outMin; + } + + //changed to templated function, e.g. maxiMap::maxiClamp<int>(v, l, h); + template<typename T> + static T inline clamp(T v, const T low, const T high) { + if (v > high) + v = high; + else if (v < low) { + v = low; + } + return v; + } + +}; + + +class maxiDyn { + + +public: +// double gate(double input, double threshold=0.9, long holdtime=1, double attack=1, double release=0.9995); +// double compressor(double input, double ratio, double threshold=0.9, double attack=1, double release=0.9995); + double gate(double input, double threshold=0.9, long holdtime=1, double attack=1, double release=0.9995); + double compressor(double input, double ratio, double threshold=0.9, double attack=1, double release=0.9995); + double compress(double input); + double input; + double ratio; + double currentRatio; + double threshold; + double output; + double attack; + double release; + double amplitude; + void setAttack(double attackMS); + void setRelease(double releaseMS); + void setThreshold(double thresholdI); + void setRatio(double ratioF); + long holdtime; + long holdcount; + int attackphase,holdphase,releasephase; +}; + +class maxiEnv { + + +public: + double ar(double input, double attack=1, double release=0.9, long holdtime=1, int trigger=0); + double adsr(double input, double attack=1, double decay=0.99, double sustain=0.125, double release=0.9, long holdtime=1, int trigger=0); + double adsr(double input,int trigger); + double input; + double output; + double attack; + double decay; + double sustain; + double release; + double amplitude; + void setAttack(double attackMS); + void setRelease(double releaseMS); + void setDecay(double decayMS); + void setSustain(double sustainL); + int trigger; + long holdtime=1; + long holdcount; + int attackphase,decayphase,sustainphase,holdphase,releasephase; +}; + +class convert { +public: + double mtof(int midinote); +}; + + + +class maxiDistortion { +public: + /*atan distortion, see http://www.musicdsp.org/showArchiveComment.php?ArchiveID=104*/ + /*shape from 1 (soft clipping) to infinity (hard clipping)*/ + double atanDist(const double in, const double shape); + double fastAtanDist(const double in, const double shape); + double fastatan( double x ); +}; + +inline double maxiDistortion::fastatan(double x) +{ + return (x / (1.0 + 0.28 * (x * x))); +} + +inline double maxiDistortion::atanDist(const double in, const double shape) { + double out; + out = (1.0 / atan(shape)) * atan(in * shape); + return out; +} + +inline double maxiDistortion::fastAtanDist(const double in, const double shape) { + double out; + out = (1.0 / fastatan(shape)) * fastatan(in * shape); + return out; +} + + +class maxiFlanger { +public: + //delay = delay time - ~800 sounds good + //feedback = 0 - 1 + //speed = lfo speed in Hz, 0.0001 - 10 sounds good + //depth = 0 - 1 + double flange(const double input, const unsigned int delay, const double feedback, const double speed, const double depth); + maxiDelayline dl; + maxiOsc lfo; + +}; + +inline double maxiFlanger::flange(const double input, const unsigned int delay, const double feedback, const double speed, const double depth) +{ + //todo: needs fixing + double output; + double lfoVal = lfo.triangle(speed); + output = dl.dl(input, delay + (lfoVal * depth * delay) + 1, feedback) ; + double normalise = (1 - fabs(output)); + output *= normalise; + return (output + input) / 2.0; +} + +class maxiChorus { +public: + //delay = delay time - ~800 sounds good + //feedback = 0 - 1 + //speed = lfo speed in Hz, 0.0001 - 10 sounds good + //depth = 0 - 1 + double chorus(const double input, const unsigned int delay, const double feedback, const double speed, const double depth); + maxiDelayline dl, dl2; + maxiOsc lfo; + maxiFilter lopass; + +}; + +inline double maxiChorus::chorus(const double input, const unsigned int delay, const double feedback, const double speed, const double depth) +{ + //this needs fixing + double output1, output2; + double lfoVal = lfo.noise(); + lfoVal = lopass.lores(lfoVal, speed, 1.0) * 2.0; + output1 = dl.dl(input, delay + (lfoVal * depth * delay) + 1, feedback) ; + output2 = dl2.dl(input, (delay + (lfoVal * depth * delay * 1.02) + 1) * 0.98, feedback * 0.99) ; + output1 *= (1.0 - fabs(output1)); + output2 *= (1.0 - fabs(output2)); + return (output1 + output2 + input) / 3.0; +} + +template<typename T> +class maxiEnvelopeFollowerType { +public: + maxiEnvelopeFollowerType() { + setAttack(100); + setRelease(100); + env = 0; + } + void setAttack(T attackMS) { + attack = pow( 0.01, 1.0 / (attackMS * maxiSettings::sampleRate * 0.001 ) ); + } + void setRelease(T releaseMS) { + release = pow( 0.01, 1.0 / (releaseMS * maxiSettings::sampleRate * 0.001 ) ); + } + inline T play(T input) { + input = fabs(input); + if (input>env) + env = attack * (env - input) + input; + else + env = release * (env - input) + input; + return env; + } + void reset() {env=0;} + inline T getEnv(){return env;} + inline void setEnv(T val){env = val;} +private: + T attack, release, env; +}; + +typedef maxiEnvelopeFollowerType<double> maxiEnvelopeFollower; +typedef maxiEnvelopeFollowerType<float> maxiEnvelopeFollowerF; + +class maxiDCBlocker { +public: + double xm1, ym1; + maxiDCBlocker() : xm1(0), ym1(0) {} + inline double play(double input, double R) { + ym1 = input - xm1 + R * ym1; + xm1 = input; + return ym1; + } +}; + +/* + State Variable Filter + + algorithm from http://www.cytomic.com/files/dsp/SvfLinearTrapOptimised.pdf + usage: + either set the parameters separately as required (to save CPU) + + filter.setCutoff(param1); + filter.setResonance(param2); + + w = filter.play(w, 0.0, 1.0, 0.0, 0.0); + + or set everything together at once + + w = filter.setCutoff(param1).setResonance(param2).play(w, 0.0, 1.0, 0.0, 0.0); + + */ +class maxiSVF { +public: + maxiSVF() : v0z(0), v1(0), v2(0) { setParams(1000, 1);} + + //20 < cutoff < 20000 + inline maxiSVF& setCutoff(double cutoff) { + setParams(cutoff, res); + return *this; + } + + //from 0 upwards, starts to ring from 2-3ish, cracks a bit around 10 + inline maxiSVF& setResonance(double q) { + setParams(freq, q); + return *this; + } + + //run the filter, and get a mixture of lowpass, bandpass, highpass and notch outputs + inline double play(double w, double lpmix, double bpmix, double hpmix, double notchmix) { + double low, band, high, notch; + double v1z = v1; + double v2z = v2; + double v3 = w + v0z - 2.0 * v2z; + v1 += g1*v3-g2*v1z; + v2 += g3*v3+g4*v1z; + v0z = w; + low = v2; + band = v1; + high = w-k*v1-v2; + notch = w-k*v1; + return (low * lpmix) + (band * bpmix) + (high * hpmix) + (notch * notchmix); + } + +private: + inline void setParams(double _freq, double _res) { + freq = _freq; + res = _res; + g = tan(PI * freq / maxiSettings::sampleRate); + damping = res == 0 ? 0 : 1.0 / res; + k = damping; + ginv = g / (1.0 + g * (g + k)); + g1 = ginv; + g2 = 2.0 * (g + k) * ginv; + g3 = g * ginv; + g4 = 2.0 * ginv; + } + + double v0z, v1, v2, g, damping, k, ginv, g1, g2, g3 ,g4; + double freq, res; + +}; + + +#endif |
