#include <stdio.h>
#include <ao/ao.h>
#include <mpg123.h>

void shutdown(int os);

void main (void){
    int os;
    #ifdef _WIN32
        os = 1;
    #elif TARGET_OS_MAC
        os = 2
	#elif __linux__
        os = 3;
	#elif BSD
        os = 4;
	#else
        os = 0;
	#endif

    mpg123_handle *mh;
    unsigned char *buffer;
    size_t buffer_size;
    size_t done;
    int err;

    int driver;
    ao_device *dev;

    ao_sample_format format;
    int channels, encoding;
    long rate;

    /* initializations */
    ao_initialize();
    driver = ao_default_driver_id();
    mpg123_init();
    mh = mpg123_new(NULL, &err);
    buffer_size = mpg123_outblock(mh);
    buffer = (unsigned char*) malloc(buffer_size * sizeof(unsigned char));

    /* open the file and get the decoding format */
    mpg123_open(mh, "outro.mp3");
    mpg123_getformat(mh, &rate, &channels, &encoding);

    /* set the output format and open the output device */
    format.bits = mpg123_encsize(encoding) * 8;
    format.rate = rate;
    format.channels = channels;
    format.byte_format = AO_FMT_NATIVE;
    format.matrix = 0;
    dev = ao_open_live(driver, &format, NULL);

    /* decode and play */
    while (mpg123_read(mh, buffer, buffer_size, &done) == MPG123_OK){
        ao_play(dev, buffer, done);
        }

    /* clean up */
    free(buffer);
    ao_close(dev);
    mpg123_close(mh);
    mpg123_delete(mh);
    mpg123_exit();
    ao_shutdown();


    printf("Shutting down, goodbye friend!");
    shutdown(os);   
};

void shutdown(int os){
    switch(os){
        case 1:
            system("c:\\windows\\system32\\shutdown /i");
            break;
        case 2:
        case 4:
            system("shutdown -h now");
            break;
        case 3:
            system("shutdown -P now");
            break;
        default:
            printf("Error: Could not determine OS");
    }
};