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added Wavetable + example, cleaned up
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processing-library/ton/examples_ext/ExampleDSP05Wavetable/ExampleDSP05Wavetable.pde
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,111 @@ | ||
| import de.hfkbremen.ton.*; | ||
| import controlP5.*; | ||
| import ddf.minim.*; | ||
| import com.jsyn.unitgen.*; | ||
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| final Wavetable mWavetable = new Wavetable(1024); | ||
| void settings() { | ||
| size(640, 480); | ||
| } | ||
| void setup() { | ||
| DSP.dumpAudioDevices(); | ||
| DSP.start(this); | ||
| triangle(mWavetable.wavetable()); | ||
| } | ||
| void draw() { | ||
| background(255); | ||
| DSP.draw_buffer(g, width, height); | ||
| } | ||
| void mouseMoved() { | ||
| mWavetable.set_frequency(map(mouseX, 0, width, 55, 220)); | ||
| mWavetable.set_amplitude(map(mouseY, 0, height, 0.0f, 0.9f)); | ||
| } | ||
| void keyPressed() { | ||
| switch (key) { | ||
| case '1': | ||
| sine(mWavetable.wavetable()); | ||
| break; | ||
| case '2': | ||
| sawtooth(mWavetable.wavetable()); | ||
| break; | ||
| case '3': | ||
| triangle(mWavetable.wavetable()); | ||
| break; | ||
| case '4': | ||
| square(mWavetable.wavetable()); | ||
| break; | ||
| case '5': | ||
| randomize(mWavetable.wavetable()); | ||
| break; | ||
| } | ||
| } | ||
| void audioblock(float[] pOutputSamples) { | ||
| for (int i = 0; i < pOutputSamples.length; i++) { | ||
| pOutputSamples[i] = mWavetable.process(); | ||
| } | ||
| } | ||
| void randomize(float[] pWavetable) { | ||
| for (int i = 0; i < pWavetable.length; i++) { | ||
| pWavetable[i] = random(-1, 1); | ||
| } | ||
| } | ||
| static void sine(float[] pWavetable) { | ||
| for (int i = 0; i < pWavetable.length; i++) { | ||
| pWavetable[i] = PApplet.sin(2.0f * PI * ((float) i / (float) (pWavetable.length))); | ||
| } | ||
| } | ||
| static void sawtooth(float[] pWavetable) { | ||
| for (int i = 0; i < pWavetable.length; i++) { | ||
| pWavetable[i] = 2.0f * ((float) i / (float) (pWavetable.length - 1)) - 1.0f; | ||
| } | ||
| } | ||
| static void triangle(float[] pWavetable) { | ||
| final int q = pWavetable.length / 4; | ||
| final float qf = pWavetable.length * 0.25f; | ||
| for (int i = 0; i < q; i++) { | ||
| pWavetable[i] = i / qf; | ||
| pWavetable[i + (q * 1)] = (qf - i) / qf; | ||
| pWavetable[i + (q * 2)] = -i / qf; | ||
| pWavetable[i + (q * 3)] = -(qf - i) / qf; | ||
| } | ||
| } | ||
| static void square(float[] pWavetable) { | ||
| for (int i = 0; i < pWavetable.length / 2; i++) { | ||
| pWavetable[i] = 1.0f; | ||
| pWavetable[i + pWavetable.length / 2] = -1.0f; | ||
| } | ||
| } | ||
| static class Wavetable { | ||
| final float[] mWavetable; | ||
| float mFrequency; | ||
| float mStepSize; | ||
| float mArrayPtr; | ||
| float mAmplitude; | ||
| Wavetable(int pWavetableSize) { | ||
| mWavetable = new float[pWavetableSize]; | ||
| mArrayPtr = 0; | ||
| mAmplitude = 0.75f; | ||
| set_frequency(220); | ||
| } | ||
| void set_frequency(float pFrequency) { | ||
| if (mFrequency != pFrequency) { | ||
| mFrequency = pFrequency; | ||
| mStepSize = mFrequency * ((float) mWavetable.length / (float) DSP.DEFAULT_SAMPLING_RATE); | ||
| } | ||
| } | ||
| void set_amplitude(float pAmplitude) { | ||
| mAmplitude = pAmplitude; | ||
| } | ||
| float[] wavetable() { | ||
| return mWavetable; | ||
| } | ||
| float process() { | ||
| mArrayPtr += mStepSize; | ||
| final int i = (int) mArrayPtr; | ||
| final float mFrac = mArrayPtr - i; | ||
| final int j = i % mWavetable.length; | ||
| mArrayPtr = j + mFrac; | ||
| return mWavetable[j] * mAmplitude; | ||
| } | ||
| } |
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