/* Reverse the audio file foo.wav and save it in bar.wav.
 * libsndfile example
 * Hans Fugal
 */

#include <sndfile.h>
#include <stdlib.h>

int main()
{
    SF_INFO info;
    SNDFILE *input, *output;
    float *samples;
    int len, i;
    
    /* open input file */
    input = sf_open("foo.wav", SFM_READ, &info);

    /* allocate buffer */
    len = info.frames;
    samples = malloc(sizeof(float) * len);

    /* read in input file */
    sf_read_float(input, samples, len);

    /* close the input file */
    sf_close(input);



    /* open output file */
    output = sf_open("bar.wav", SFM_WRITE, &info);

    /* write samples in reverse order to output file */
    for (i=len-1; i>=0; i--)
    {
        sf_write_float(output, &samples[i], 1);
    }

    /* close output file */
    sf_close(output);

    /* deallocate buffer */ 
    free(samples);

    return 0;
}