bela cpp osc resonator example

Author: jarmitage

examples/bela/cpp/cpp-osc-resonator/render.cpp

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+#include <Bela.h>
+#include <libraries/OscSender/OscSender.h>
+#include <libraries/OscReceiver/OscReceiver.h>
+#include "Resonator.h" // https://github.com/jarmitage/resonators
+
+OscReceiver oscReceiver;
+const char* remoteIp = "192.168.7.1";
+const int localPort = 7562;
+
+Resonator res;
+ResonatorOptions options; // will initialise to default
+
+void onReceive(oscpkt::Message* msg, void* arg) {
+
+  if(msg->match("/resonator")) {
+    float freq, gain, decay;
+    msg->match("/resonator")
+      .popFloat(freq)
+      .popFloat(gain)
+      .popFloat(decay)
+      .isOkNoMoreArgs();
+    res.setParameters(freq, gain, decay);
+    res.update();
+    printf("Freq: %f, Gain: %f, Decay: %f\n", freq, gain, decay);
+
+  } else if (msg->match("/resonator/freq")) {
+
+    float freq;
+    msg->match("/resonator/freq").popFloat(freq).isOkNoMoreArgs();
+    res.setParameter(0, freq);
+    res.update();
+    printf("Freq: %f\n", freq);
+
+  } else if (msg->match("/resonator/gain")) {
+
+    float gain;
+    msg->match("/resonator/gain").popFloat(gain).isOkNoMoreArgs();
+    res.setParameter(1, gain);
+    res.update();
+    printf("Gain: %f\n", gain);
+
+  } else if (msg->match("/resonator/decay")) {
+
+    float decay;
+    msg->match("/resonator/decay").popFloat(decay).isOkNoMoreArgs();
+    res.setParameter(2, decay);
+    res.update();
+    printf("Decay: %f\n", decay);
+
+  } else {
+    printf("Message address not recognised\n");
+  }
+}
+
+bool setup (BelaContext *context, void *userData) {
+
+  oscReceiver.setup(localPort, onReceive);
+
+  res.setup(options, context->audioSampleRate, context->audioFrames);
+  res.setParameters(440, 0.1, 0.5); // freq, gain, decay
+  res.update(); // update the state of the resonator based on the new parameters
+
+  return true;
+}
+
+void render (BelaContext *context, void *userData) { 
+
+  for (unsigned int n = 0; n < context->audioFrames; ++n) {
+
+    float in = audioRead(context, n, 0); // an excitation signal
+    float out = 0.0f;
+
+    out = res.render(in);
+
+    audioWrite(context, n, 0, out);
+    audioWrite(context, n, 1, out);
+  
+  }
+
+}
+
+void cleanup (BelaContext *context, void *userData) { }

examples/bela/cpp/cpp-osc-resonator/server.py

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+"""
+Authors:
+  Victor Shepardson
+  Jack Armitage
+  Intelligent Instruments Lab 2022
+"""
+import random
+
+from iipyper import OSC, run, repeat
+
+def main(host="192.168.7.1", port=7563):
+    
+    osc = OSC(host, port)
+    osc.create_client("bela", host="192.168.7.2", port=7562)
+
+    connected = False
+
+    count = 0
+    freq = 440.0
+    gain = 0.1
+    decay = 0.5
+
+    @repeat(1)
+    def _():
+        nonlocal freq, gain, decay, count
+        freq = random.random() * 10000 + 50
+        gain = random.random()
+        decay = random.random()
+        if count==0:
+            osc("bela", "/resonator", freq, gain, decay)
+        elif count==1:
+            osc("bela", "/resonator/freq", freq)
+        elif count==2:
+            osc("bela", "/resonator/gain", gain)
+        elif count==3:
+            osc("bela", "/resonator/decay", decay)
+        count = (count + 1) % 4
+
+if __name__=='__main__':
+    run(main)