c8f7dd52c6
- Adjust some demo window sizes. - Replace Random.double by Double.uniform - Tweak some demos so screenshots look more interesting
36 lines
968 B
Kotlin
36 lines
968 B
Kotlin
import ddf.minim.Minim
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import ddf.minim.analysis.FFT
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import ddf.minim.analysis.LanczosWindow
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import org.openrndr.application
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import org.openrndr.extra.minim.minim
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import org.openrndr.math.map
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import kotlin.math.ln
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fun main() = application {
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configure {
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width = 1280
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height = 720
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}
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program {
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val minim = minim()
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if (minim.lineOut == null) {
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application.exit()
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}
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val lineIn = minim.getLineIn(Minim.MONO, 2048, 48000f)
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if (lineIn == null) {
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application.exit()
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}
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val fft = FFT(lineIn.bufferSize(), lineIn.sampleRate())
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fft.window(LanczosWindow())
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extend {
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fft.forward(lineIn.mix)
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for (i in 0 until 200) {
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val bandDB = 20.0 * ln(2.0 * fft.getBand(i) / fft.timeSize())
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drawer.rectangle(i * 5.0, height / 2.0, 5.0, bandDB.map(0.0, -150.0, 0.0, -height / 8.0))
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}
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}
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}
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}
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