// ex11.cpp / Music 120 / Lecture 3
// Pitch-controllable "BeeThree" instrument. Stops when pitch is set "zero".
//
// Mac OS X with StkX:
//  g++ -g -o ex11 ex11.cpp -framework StkX -D__STKX__
//
// CCRMA Linux machines:
//  g++ -g -o ex11 ex11.cpp -I/usr/include/stk -lstk -lasound -ljack
//
// Usage: ./ex11
// Example: ./ex11
//
// Created by Woon Seung Yeo on 10/9/06.
// Based on the callback sample code by Gary Scavone and Perry Cook.
// Copyright 2006 CCRMA, Stanford University. All rights reserved.

#include <iostream>

#ifdef	__STKX__
	#include <StkX/StkX.h>
#else
	#include "BeeThree.h"
	#include "RtAudio.h"
#endif

int tick_c(char *buffer, int bufferSize, void *dataPointer) {
	// Pointer to "BeeThree" from main
	BeeThree *beethree = (BeeThree *) dataPointer;
	StkFloat *samples = (StkFloat *) buffer;

	// Filling buffer with "tick"s of beethree
	for ( int i=0; i<bufferSize; i++ )
		*samples++ = beethree->tick();

	return 0;
}

int main (int argc, char* const argv[]) {

	Stk::setSampleRate( 44100.0 );

	float frequency = 440.0;		// Initial frequency value
	
	BeeThree* beethree = new BeeThree();	// BeeThree
	beethree->noteOn( frequency, 0.7 );	// "noteOn"

	RtAudio* dac;
	RtAudioFormat format = ( sizeof(StkFloat) == 8 ) ? RTAUDIO_FLOAT64 : RTAUDIO_FLOAT32;
	int bufferSize = RT_BUFFER_SIZE;
	dac = new RtAudio(0, 1, 0, 0, format, (int)Stk::sampleRate(), &bufferSize, 0);
	dac->setStreamCallback(&tick_c, (void *)beethree);

	dac->startStream();

	// Loop to take frequency value. Enter "0" to exit.
	while ( frequency != 0 ) {
		std::cout << "\nEnter new frequency (0 to quit): ";
		std::cin >> frequency;
		beethree->setFrequency( frequency );
	}

	dac->cancelStreamCallback();
	dac->closeStream();

	delete dac;
	delete beethree;

	return 0;
}