giuliomoro@24: /*
giuliomoro@24:  * render.cpp
giuliomoro@24:  *
giuliomoro@24:  *  Created on: Oct 24, 2014
giuliomoro@24:  *      Author: parallels
giuliomoro@24:  */
giuliomoro@24: 
andrewm@56: #include <BeagleRT.h>
giuliomoro@92: //#include <rtdk.h>
giuliomoro@24: #include <cmath>
giuliomoro@221: #include <NetworkSend.h>
giuliomoro@92: #include <Utilities.h>
giuliomoro@92: 
andrewm@56: // setup() is called once before the audio rendering starts.
giuliomoro@24: // Use it to perform any initialisation and allocation which is dependent
giuliomoro@24: // on the period size or sample rate.
giuliomoro@24: //
giuliomoro@24: // userData holds an opaque pointer to a data structure that was passed
giuliomoro@24: // in from the call to initAudio().
giuliomoro@24: //
giuliomoro@24: // Return true on success; returning false halts the program.
giuliomoro@221: 
giuliomoro@221: NetworkSend networkSend;
giuliomoro@221: float gFrequency;
giuliomoro@221: float gInverseSampleRate;
giuliomoro@221: float gPhase;
andrewm@56: bool setup(BeagleRTContext *context, void *userData)
giuliomoro@24: {
giuliomoro@24: 	// Retrieve a parameter passed in from the initAudio() call
giuliomoro@24: 	gFrequency = *(float *)userData;
giuliomoro@24: 
giuliomoro@221: 	networkSend.setup(context->audioSampleRate, context->audioFrames, 3, 9999, "192.168.7.1");
andrewm@56: 	gInverseSampleRate = 1.0 / context->audioSampleRate;
giuliomoro@221: 	gPhase = 0.2132;
giuliomoro@24: 	return true;
giuliomoro@24: }
giuliomoro@24: 
giuliomoro@24: // render() is called regularly at the highest priority by the audio engine.
giuliomoro@24: // Input and output are given from the audio hardware and the other
giuliomoro@24: // ADCs and DACs (if available). If only audio is available, numMatrixFrames
giuliomoro@24: // will be 0.
giuliomoro@24: 
andrewm@56: void render(BeagleRTContext *context, void *userData)
giuliomoro@221: {
andrewm@56: 	for(unsigned int n = 0; n < context->audioFrames; n++) {
giuliomoro@24: 		float out = 0.7f * sinf(gPhase);
giuliomoro@24: 		gPhase += 2.0 * M_PI * gFrequency * gInverseSampleRate;
giuliomoro@24: 		if(gPhase > 2.0 * M_PI)
giuliomoro@24: 			gPhase -= 2.0 * M_PI;
giuliomoro@24: 
giuliomoro@221: 		for(unsigned int channel = 0; channel < context->audioChannels; channel++){
andrewm@56: 			context->audioOut[n * context->audioChannels + channel] = out;
giuliomoro@24: 		}
giuliomoro@221: 		networkSend.log(out);
giuliomoro@92: 	}
giuliomoro@24: }
giuliomoro@24: 
andrewm@56: // cleanup() is called once at the end, after the audio has stopped.
andrewm@56: // Release any resources that were allocated in setup().
giuliomoro@24: 
andrewm@56: void cleanup(BeagleRTContext *context, void *userData)
giuliomoro@24: {
giuliomoro@24: }