# play.c

    #include "common.h"
    #include <signal.h>

    int repeat= 1;

    void stopplay (int signo);
    void hhmmss (u_int16_t seconds, u_int16_t *hh, u_int16_t *mm, u_int16_t *ss);
    void usage (void);

    int main (int argc, char **argv)
    {
            njb_t njbs[NJB_MAX_DEVICES], *njb;
            int i, n, status, change, opt, debug;
            u_int16_t sec, hh, mm, ss;
            u_int32_t trackid;
            extern char *optarg;
            extern int optind;

            debug= 0;

            while ( (opt= getopt(argc, argv, "D:")) != -1 ) {
                    switch (opt) {
                    case 'D':
                            debug= atoi(optarg);
                            break;
                    default:
                            break;
                    }
            }
            argc-= optind;
            argv+= optind;

            if ( ! argc ) usage();

            if ( debug ) NJB_Set_Debug(debug);

            signal(SIGINT, stopplay);

            if (NJB_Discover(njbs, 0, &n) == -1) {
              fprintf(stderr, "could not locate any jukeboxes\n");
              return 1;
            }

            if ( n == 0 ) {
                    fprintf(stderr, "no NJB devices found\n");
                    return 0;
            }

            njb= njbs;

            if ( NJB_Open(njb) == -1 ) {
                    NJB_Error_Dump(njb,stderr);
                    return 1;
            }

            if ( NJB_Capture(njb) == -1 ) {
                    NJB_Error_Dump(njb,stderr);
                    return 1;
            }

            for (i= 0; i< argc; i++) {
                    trackid= strtoul(argv[i], NULL, 10);

                    if ( i == 0 ) {
                            status= NJB_Play_Track(njb, trackid);
                    } else {
                            status= NJB_Queue_Track(njb, trackid);
                    }

                    if ( status == -1 ) NJB_Error_Dump(njb,stderr);
            }

            printf("---> Hit ^C to exit <---\n");

            change= 0;
            i= 0;
            printf("Track ID %10.10s: 00:00:00\b\b\b\b\b\b\b", argv[i]);
            fflush(stdout);
            while ( repeat ) {
                    if ( change ) {
                            i++;
                            if ( i == argc ) {
                                    repeat= 0;
                            } else {
                                    printf("\rTrack ID %10.10s: 00:00:00\b\b\b\b\b\b\b",
                                            argv[i]);
                                    fflush(stdout);
                            }
                            change= 0;
                    } else
                            NJB_Elapsed_Time(njb, &sec, &change);
                    hhmmss(sec, &hh, &mm, &ss);
                    printf("%02u:%02u:%02u\b\b\b\b\b\b\b\b", hh, mm, ss);
                    fflush(stdout);

                    sleep(1);
            }
            printf("\n");

            NJB_Stop_Play(njb);

            NJB_Release(njb);

            NJB_Close(njb);
            return 0;
    }

    void stopplay (int signo)
    {
            repeat= 0;
    }

    void hhmmss (u_int16_t seconds, u_int16_t *hh, u_int16_t *mm, u_int16_t *ss)
    {
            if ( seconds >= 3600 ) *hh= seconds/3600;
            seconds-= 3600*(*hh);
            if ( seconds >= 60 ) *mm= seconds/60;
            *ss= seconds-(60*(*mm));
    }

    void usage (void) {
            fprintf(stderr, "usage: play [ -D debuglvl ] <trackid> ...\n");
            exit(1);
    }