comparison projects/basic_network/render.cpp @ 24:ad5cd8dd99b3 bbb_network

UDP communication in place, pre-alpha

+/*
+ * render.cpp
+ *
+ *  Created on: Oct 24, 2014
+ *      Author: parallels
+ */
+
+#include "../../include/RTAudioSettings.h"
+#include "../../include/render.h"
+#include <cmath>
+#include "../../include/client.h"
+#include "../../include/RTAudio.h"	// to schedule lower prio parallel process
+#include <rtdk.h>
+float gFrequency;
+float gPhase;
+float gInverseSampleRate;
+int gCount=0;
+networkData networkObject;
+AuxiliaryTask transmitReceiveDataTask;
+
+void transmitReceiveData(){
+	printf("transmitAndReceiveData\n");
+	while(!gShouldStop){
+		//sendMessage(networkObject);
+		//receiveMessage(networkObject);
+		usleep(10000);
+	}
+	closeSockets();
+}
+
+// initialise_render() is called once before the audio rendering starts.
+// Use it to perform any initialisation and allocation which is dependent
+// on the period size or sample rate.
+//
+// userData holds an opaque pointer to a data structure that was passed
+// in from the call to initAudio().
+//
+// Return true on success; returning false halts the program.
+bool initialise_render(int numMatrixChannels, int numDigitalChannels, int numAudioChannels,
+					   int numMatrixFramesPerPeriod,
+					   int numAudioFramesPerPeriod,
+					   float matrixSampleRate, float audioSampleRate,
+					   void *userData, RTAudioSettings *settings)
+{
+	// Retrieve a parameter passed in from the initAudio() call
+	gFrequency = *(float *)userData;
+
+	gInverseSampleRate = 1.0 / audioSampleRate;
+	gPhase = 0.0;
+
+	networkObject.counter=&gCount;
+	networkObject.variables[0]=&gFrequency;
+	networkObject.variables[1]=&gPhase;
+	networkObject.numVariables=2;
+	setupSockets(settings->receivePort, settings->transmitPort, settings->serverName);
+	transmitReceiveDataTask=createAuxiliaryTaskLoop(*transmitReceiveData, 50, "transmit-receive-data");
+	//scheduleAuxiliaryTask(transmitReceiveDataTask); //here it does not work
+	return true;
+}
+
+// render() is called regularly at the highest priority by the audio engine.
+// Input and output are given from the audio hardware and the other
+// ADCs and DACs (if available). If only audio is available, numMatrixFrames
+// will be 0.
+
+void render(int numAnalogFrames, int numAudioFrames, int numDigitalFrames, float *audioIn, float *audioOut,
+		float *analogIn, float *analogOut, uint32_t *digital)
+{
+	for(int n = 0; n < numAudioFrames; n++) {
+		float out = 0.7f * sinf(gPhase);
+		gPhase += 2.0 * M_PI * gFrequency * gInverseSampleRate;
+		if(gPhase > 2.0 * M_PI)
+			gPhase -= 2.0 * M_PI;
+
+		for(int channel = 0; channel < gNumAudioChannels; channel++)
+			audioOut[n * gNumAudioChannels + channel] = out;
+		if(gCount==0){
+			scheduleAuxiliaryTask(transmitReceiveDataTask);
+		}
+		gCount++;
+	}
+}
+
+// cleanup_render() is called once at the end, after the audio has stopped.
+// Release any resources that were allocated in initialise_render().
+
+void cleanup_render()
+{
+}