Bela cpp OSC arrays example

Author: jarmitage

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

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+#include <Bela.h>
+#include <libraries/OscSender/OscSender.h>
+#include <libraries/OscReceiver/OscReceiver.h>
+#include <cmath>
+
+OscSender oscSender;
+OscReceiver oscReceiver;
+
+const char* remoteIp = "192.168.7.1";
+const int remotePort = 7563;
+const int localPort = 7562;
+
+const int OSC_PACKET_LEN = 300;
+const int OUT_CHANNELS = 2;
+
+std::vector<float> oscInBuffer;
+std::vector<float> oscOutBuffer;
+
+float gIn1, gIn2;
+
+int writePointer = 0;
+int packetsSent = 0;
+int gAudioFramesPerAnalogFrame = 0;
+
+void on_receive(oscpkt::Message* msg, void* arg) {
+  if(msg->match("/bela")) {
+    auto argReader = msg->match("/bela");
+    for (int i=0; i<OUT_CHANNELS * OSC_PACKET_LEN; i++)
+      argReader.popFloat(oscInBuffer[i]);
+    argReader.isOkNoMoreArgs();
+  }
+  printf("Printing oscInBuffer: ");
+  for(auto f : oscInBuffer)
+    printf("%f ", f);
+  printf("\n");
+}
+
+bool setup(BelaContext *context, void *userData) {
+  oscSender.setup(remotePort, remoteIp);
+  oscReceiver.setup(localPort, on_receive);
+
+  oscInBuffer.resize(OUT_CHANNELS * OSC_PACKET_LEN);
+  oscOutBuffer.resize(OUT_CHANNELS * OSC_PACKET_LEN);
+  
+  if (context->analogFrames)
+    gAudioFramesPerAnalogFrame = context->audioFrames / context->analogFrames;
+    
+  return true;
+}
+
+void render(BelaContext *context, void *userData) {
+  for (unsigned int n = 0; n < context->audioFrames; ++n) {
+    if (gAudioFramesPerAnalogFrame && !(n % gAudioFramesPerAnalogFrame)) {
+      gIn1 = analogRead(context, n / gAudioFramesPerAnalogFrame, 0);
+      gIn2 = analogRead(context, n / gAudioFramesPerAnalogFrame, 1);
+    }
+    
+    oscOutBuffer[writePointer] = gIn1;
+    oscOutBuffer[OSC_PACKET_LEN+writePointer] = gIn2;
+    
+    if (writePointer + 1 == OSC_PACKET_LEN) {
+      oscSender.newMessage("/bela");
+      oscSender.add(packetsSent);
+      for (auto v : oscOutBuffer)
+        oscSender.add(v);
+      oscSender.send();
+      packetsSent += 1;
+    }
+    writePointer = (writePointer+1)%OSC_PACKET_LEN;
+  }
+}
+
+void cleanup(BelaContext*context, void *userData){}

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

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+"""
+Authors:
+  Victor Shepardson
+  Jack Armitage
+  Intelligent Instruments Lab 2022
+"""
+
+import numpy as np
+from iipyper import OSC, run, repeat
+
+OSC_PACKET_LEN = 300
+OUT_CHANNELS = 2
+
+def main(host="192.168.7.1", port=7563):
+
+    osc = OSC(host, port, verbose=False)
+    osc.create_client("bela", host="192.168.7.2", port=7562)
+
+    @osc.args("/*")
+    def _(address, *args):
+        print(f"{address} {args}")
+
+    @repeat(1)
+    def _():
+        arr = np.random.rand(OSC_PACKET_LEN * OUT_CHANNELS)
+        osc("bela", "/bela", *arr)
+
+if __name__=='__main__':
+    run(main)