A bare minimum demonstration of writing audio to an AIFF file using libsndfile. (error checking not included)

simple_aiff.c

/* simple_aiff.c
 * Jacob Joaquin <jacobjoaquin@gmail.com>
 * csoundblog.com
 *
 * A bare minimum demonstration of writing audio to an AIFF file using
 * libsndfile. (error checking not included)
 *
 * License:
 * GNU Lesser General Public License
 * http://www.gnu.org/copyleft/lesser.html
 *
 * libsndfile by Erik de Castro Lopo
 * http://www.mega-nerd.com/libsndfile/
 */
 
#include <sndfile.h>
#include <stdlib.h>

int main()
{
    SNDFILE* sndfile;
    SF_INFO* sf_info;
    float* frame_buffer;
    int samplerate = 44100;
    int frames = 44100 * 4;
    float saw = 0.0;

    /* Set sound file attributes */
    sf_info = (SF_INFO *) malloc(sizeof(SF_INFO));
    sf_info->samplerate = samplerate;
    sf_info->channels = 1;
    sf_info->format = SF_FORMAT_AIFF | SF_FORMAT_PCM_16;

    /* Open sound file for writing */
    sndfile = sf_open("./simple_aiff.aif", SFM_WRITE, sf_info);

    /* Intialize frame_buffer and point to saw */
    frame_buffer = (float*) malloc(sf_info->channels * sizeof(float));
    frame_buffer = &saw;

    /* Write generated saw wave to file */
    do
    {
        sf_writef_float(sndfile, frame_buffer, 1);
        saw += 0.0025 - (saw >= 1.0) * 2.0;
    } while(--frames);
    
    /* Close sound file and return */
    sf_close(sndfile);
    return 0;
}