//
//  write.cpp
//  MUSIC256a/CS476a - Lecture 4a
//  -----------------------------
//  Shows how to write to an audio file using libsndfile
//  Uses libsndfile, by Erik de Castro Lopo
//
//  Created by Jorge Herrera on 2011-10-17.
//
//  To compile this example you'll need libsndfile installed in your system.
//  Then type:
//
//  g++ write.cpp -o write -lsndfile

#include <sndfile.h>
#include <iostream>
#include <cmath>

#define SAMPLE double
#define MY_SRATE 44100

using namespace std;


int main()
{
    const char* outfilename="foo.wav";

    // define the desired output format
    SF_INFO sfinfo ;
    sfinfo.channels = 1;
    sfinfo.samplerate = MY_SRATE;
    sfinfo.format = SF_FORMAT_WAV | SF_FORMAT_PCM_16;
    
    // open to file
    SNDFILE * outfile = sf_open( outfilename, SFM_WRITE, &sfinfo );
    if (not outfile) return -1;

    // prepare a 3 second long buffer (sine wave)
    const int size = MY_SRATE*3;
    double sample[size];
    float current=0.;
    for (int i=0; i<size; i++) 
    {
        sample[i]=sin(double(i)/size*M_PI*1500);
    }

    // write the entire buffer to the file
    sf_count_t count = sf_write_double ( outfile, &sample[0], size ) ;

    // force write to disk
    sf_write_sync( outfile );
    // don't forget to close the file
    sf_close( outfile );
	
    return 0;
}