giuliomoro@94: /*
giuliomoro@94:  * render.cpp
giuliomoro@94:  *
giuliomoro@94:  *  Created on: Oct 24, 2014
giuliomoro@94:  *      Author: parallels
giuliomoro@94:  */
giuliomoro@94: 
giuliomoro@94: #include <BeagleRT.h>
giuliomoro@94: #include <cmath>
giuliomoro@94: #include <client.h>
giuliomoro@94: 
giuliomoro@94: float gFrequency;
giuliomoro@94: float gPhase;
giuliomoro@94: float gInverseSampleRate;
giuliomoro@94: int gCount=0;
giuliomoro@94: networkData networkObject;
giuliomoro@94: AuxiliaryTask transmitReceiveDataTask;
giuliomoro@94: 
giuliomoro@94: void transmitReceiveData(){
giuliomoro@94:    	printf("transmitReceiveData auxiliary task has started\n");
giuliomoro@94: 	while(!gShouldStop){
giuliomoro@94: 		sendMessage(networkObject);
giuliomoro@94: 		receiveMessage(networkObject);
giuliomoro@94: 		usleep(1000);
giuliomoro@94: 	}
giuliomoro@94: 	closeSockets();
giuliomoro@94: }
giuliomoro@94: 
giuliomoro@94: // setup() is called once before the audio rendering starts.
giuliomoro@94: // Use it to perform any initialisation and allocation which is dependent
giuliomoro@94: // on the period size or sample rate.
giuliomoro@94: //
giuliomoro@94: // userData holds an opaque pointer to a data structure that was passed
giuliomoro@94: // in from the call to initAudio().
giuliomoro@94: //
giuliomoro@94: // Return true on success; returning false halts the program.
giuliomoro@94: bool setup(BeagleRTContext *context, void *userData)
giuliomoro@94: {
giuliomoro@94: 	// Retrieve a parameter passed in from the initAudio() call
giuliomoro@94: 	gFrequency = *(float *)userData;
giuliomoro@94: 
giuliomoro@94: 	gInverseSampleRate = 1.0 / context->audioSampleRate;
giuliomoro@94: 	gPhase = 0.0;
giuliomoro@94: 
giuliomoro@94: 	networkObject.counter=&gCount;
giuliomoro@94: 	networkObject.variables[0]=&gFrequency;
giuliomoro@94: 	networkObject.variables[1]=&gPhase;
giuliomoro@94: 	networkObject.numVariables=2;
giuliomoro@94: 
giuliomoro@94: 	setupSockets(settings->receivePort, settings->transmitPort, settings->serverName);
giuliomoro@94: 	transmitReceiveDataTask= BeagleRT_createAuxiliaryTask(*transmitReceiveData, 80, "transmit-receive-data");
giuliomoro@94: 	//scheduleAuxiliaryTask(transmitReceiveDataTask); //here it does not work
giuliomoro@94: 	return true;
giuliomoro@94: }
giuliomoro@94: 
giuliomoro@94: // render() is called regularly at the highest priority by the audio engine.
giuliomoro@94: // Input and output are given from the audio hardware and the other
giuliomoro@94: // ADCs and DACs (if available). If only audio is available, numMatrixFrames
giuliomoro@94: // will be 0.
giuliomoro@94: 
giuliomoro@94: void render(BeagleRTContext *context, void *userData)
giuliomoro@94: {
giuliomoro@94: 	for(unsigned int n = 0; n < context->audioFrames; n++) {
giuliomoro@94: 		float out = 0.7f * sinf(gPhase);
giuliomoro@94: 		gPhase += 2.0 * M_PI * gFrequency * gInverseSampleRate;
giuliomoro@94: 		if(gPhase > 2.0 * M_PI)
giuliomoro@94: 			gPhase -= 2.0 * M_PI;
giuliomoro@94: 
giuliomoro@94: 		for(unsigned int channel = 0; channel < context->audioChannels; channel++)
giuliomoro@94: 			context->audioOut[n * context->audioChannels + channel] = out;
giuliomoro@94: 
giuliomoro@94: 		if(gCount == 0){
giuliomoro@94: 			BeagleRT_scheduleAuxiliaryTask(transmitReceiveDataTask);
giuliomoro@94: 		}
giuliomoro@94: 		gCount++;
giuliomoro@94: 	}
giuliomoro@94: }
giuliomoro@94: 
giuliomoro@94: // cleanup() is called once at the end, after the audio has stopped.
giuliomoro@94: // Release any resources that were allocated in setup().
giuliomoro@94: 
giuliomoro@94: void cleanup(BeagleRTContext *context, void *userData)
giuliomoro@94: {
giuliomoro@94: }